CN105897432B - A kind of Power over Ethernet POE distributor - Google Patents
A kind of Power over Ethernet POE distributor Download PDFInfo
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- CN105897432B CN105897432B CN201510038178.XA CN201510038178A CN105897432B CN 105897432 B CN105897432 B CN 105897432B CN 201510038178 A CN201510038178 A CN 201510038178A CN 105897432 B CN105897432 B CN 105897432B
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Abstract
The present invention provides a kind of Power over Ethernet POE distributor, with so that each network interface of the POE distributor may act as power supply network interface, can also be used as by power grid mouth so that POE distributor using more flexible, network interface is distinguished without user.The POE distributor, comprising: multiple network interfaces, each network interface are separately connected different power supply modules, power receiving equipment detection module, power receiving equipment control module, wherein each power receiving equipment detection module be connected to it is same by electric module；Wherein, the power supply module of each network interface is all connect with the power supply module of other network interfaces, the power receiving equipment detection module of each network interface is all connect with the power receiving equipment detection module of other network interfaces, and the power receiving equipment control module of each network interface is connect with the power receiving equipment detection module of other network interfaces respectively.
Description
Technical field
The present invention relates to technical field of electricity more particularly to a kind of Power over Ethernet POE distributors.
Background technique
Power over Ethernet (Power Over Ethernet, POE) technology is to be routed foundation frame in existing Ethernet Cat.5
Under structure, while transmitting data-signal for ethernet client, the technology of direct current supply also is provided for it, ethernet client can
Think Internet protocol (Internet Protocol, IP) telephone set, WLAN (Wireless Local Area
Net, WLAN) access point (Access Point, AP), web camera etc..
It mainly include power supply unit (Power Sourcing Equipment, PSE) and power receiving equipment in POE system
(Powered Device, PD) two parts.For example, power supply unit is POE interchanger, power receiving equipment is POE distributor, then basis
Traditional POE dispenser technology can only realize fixed network interface by electricity and fixed network interface power supply.
In traditional POE dispenser technology, usually network interface 2 and network interface 3 are used as and are supplied as by power grid mouth by network interface 1
Power grid mouth.Referring to shown in Fig. 1, network interface 1 is only used for connection POE interchanger, network interface 2 and network interface 3, be only used for connection by
Electric equipment, and the electric energy received can only be less than the half that network interface 1 receives electric energy.Wherein, PSE represents power supply unit,
PD represents power receiving equipment, and system power supply refers to that the electric energy for receiving network interface 1 distributes to the other parts application of this equipment.
However, thus bringing 2 big technological deficiencies: 1, same POE dispenser device, the maximum output of each network interface
Power is only fixed value, if necessary to connect the PD equipment of bigger power consumption, it is necessary to replace POE distributor, usage scenario is solid
It is fixed, single；2, the confession of all network interfaces is unique by Electricity Functional, and this requires the placement of dispenser device, wiring must be according to solid
Fixed design carries out, and otherwise can not carry out cable connection, if user POE interchanger be connected to network interface 2 in Fig. 1 or
Network interface 3, then distributor can not work, then limit the usage experience of client.
In conclusion in the prior art, each network interface of POE distributor can only be power supply network interface or by power grid mouth, no
Energy flexible Application, needs user to distinguish network interface.
Summary of the invention
The embodiment of the invention provides a kind of Power over Ethernet POE distributor, with so that the POE distributor each net
Mouth may act as power supply network interface, can also be used as by power grid mouth so that POE distributor using more flexible, be not necessarily to
User distinguishes network interface.
The embodiment of the invention provides a kind of Power over Ethernet POE distributors, comprising:
Multiple network interfaces, each network interface are separately connected different power supply modules, power receiving equipment detection module, power receiving equipment control
Module, wherein each power receiving equipment detection module be connected to it is same by electric module；
Wherein, the power supply module of each network interface is all connect with the power supply module of other network interfaces, the power receiving equipment of each network interface
Detection module is all connect with the power receiving equipment detection module of other network interfaces, the power receiving equipment control module of each network interface respectively with its
The power receiving equipment detection module of his network interface connects；
The power receiving equipment detection module of any network interface, the inspection for being sent when the power supply unit received through local terminal network interface
What the power receiving equipment control module surveyed signal, and do not receive other network interfaces was sent is used to close this power receiving equipment detection module
When controlling signal, which is sent to described by electric module, also, is sent out to the power receiving equipment control module of other network interfaces
Send the control signal of the power receiving equipment control module for closing other network interfaces；
The power receiving equipment control module of any network interface, the inspection for being sent when the power supply unit received through local terminal network interface
What the power receiving equipment detection module surveyed signal, and do not receive other network interfaces was sent is used to close this power receiving equipment control module
When controlling signal, the power receiving equipment for closing other network interfaces is sent to the power receiving equipment detection module of other network interfaces and detects mould
The control signal of block；
The power supply module of any network interface, the power supply signal for being sent when the power supply unit received through local terminal network interface
When, the power supply signal is supplied to the power supply module of other network interfaces；And when local terminal network interface connection power receiving equipment, receive
To other network interfaces power supply module send power supply signal, by the power supply signal by local terminal network interface be supplied to local terminal network interface by
Electric equipment.
By the way that each network interface of POE distributor is separately connected power supply module, power receiving equipment detection module, power receiving equipment control
Molding block, wherein each power receiving equipment detection module be connected to it is same by electric module, with so that the POE distributor each net
Mouth may act as power supply network interface, can also be used as by power grid mouth so that POE distributor using more flexible, be not necessarily to
User distinguishes network interface.
Preferably, the power receiving equipment detection module, comprising: first switch device, first resistor, first capacitor, first
Diode and first input end, the second input terminal, third output end and the 4th input terminal；
Wherein, the first end of first switch device is connect with the first input end of the power receiving equipment detection module, and first opens
The second end for closing device is connect with the second input terminal of first resistor and the power receiving equipment detection module, first switch device
Third end is connect with the third output end of the power receiving equipment detection module；
One end of first resistor is connect with the second end of the first switch device, the other end ground connection of first resistor；
One end of first capacitor is connect with the second end of the first switch device, the other end ground connection of first capacitor；
The first end of first diode is connect with the 4th input terminal of the power receiving equipment detection module, first diode it is another
One end is connect with the second end of the first switch device；
The first input end and local terminal network interface connection of the power receiving equipment detection module, the second of the power receiving equipment detection module
Input terminal is connect with the power receiving equipment control module of other network interfaces；The third output end of the power receiving equipment detection module respectively with its
The power receiving equipment control module of his network interface, the power receiving equipment detection module of other network interfaces are connected, are connected by electric module；It should be set by electricity
4th input terminal of standby detection module is connect with the power supply module of local terminal network interface.
Preferably, the power receiving equipment control module, including power receiving equipment corresponding with other each network interfaces controls submodule
Block；
Wherein, power receiving equipment control submodule, the detection for being sent when the power supply unit received through local terminal network interface
Signal, and the control for being used to close this power receiving equipment control module that the power receiving equipment detection module for not receiving other network interfaces is sent
When signal processed, the power receiving equipment for closing the network interface is sent to the power receiving equipment detection module of corresponding other network interfaces and is examined
Survey the control signal of module.
Preferably, the power receiving equipment control submodule, comprising: second switch device, the second diode, the three or two pole
Pipe, second resistance, the second capacitor and first input end, the second input/output terminal, third output end and the 4th input terminal；
Wherein, the first end of second switch device is connect with the first input end of the power receiving equipment control submodule, and second
The second end of switching device is connect with the second input/output terminal of second resistance and the power receiving equipment control submodule, and second
The third end of switching device is connect with the first end of the second diode；
The first end of second diode is connect with the third end of the second switch device, the other end of the second diode with
The third output end of the power receiving equipment control submodule connects；
The first end of third diode is connect with the 4th input terminal of the power receiving equipment control submodule, third diode
The other end is connect with the second end of the second switch device；
One end of second resistance is connect with the second end of the second switch device, the other end ground connection of second resistance；
One end of second capacitor is connect with the second end of the second switch device, the other end ground connection of the second capacitor；
The first input end and local terminal network interface connection of the power receiving equipment control submodule, the power receiving equipment control submodule
Second input/output terminal controls mould with the power receiving equipment of the power receiving equipment detection module of other network interface, other network interfaces respectively
Block connection；The third output end of the power receiving equipment control submodule respectively with the power receiving equipment detection module of other network interfaces, other
The power receiving equipment control module of network interface connects；4th input terminal of the power receiving equipment control submodule and the power supply mould of local terminal network interface
Block connection.
Preferably, the power supply module, comprising: power control module, input signal control module and output signal control
Module；
Wherein, input signal control module, the power supply signal that the power supply unit for receiving through local terminal network interface is sent, and
The power supply signal is supplied to the 4th input terminal of the power receiving equipment detection module of local terminal network interface, power receiving equipment control module
The power control module of 4th input terminal and all network interfaces；
Power control module, for receiving the power supply signal of input signal control module transmission, and by the power supply signal
It is supplied to output signal control module, and when local terminal network interface connection power receiving equipment, receives the power supply module hair of other network interfaces
The power supply signal sent；
Output signal control module, the power supply signal sent for receiving power control module, and when local terminal network interface connects
When receiving electric equipment, which is supplied to the power receiving equipment of local terminal network interface connection by local terminal network interface.
Preferably, the input signal control module, comprising:
First zener diode, 3rd resistor, third capacitor, third switching device, the 4th diode and the first input
End, second output terminal and third output end；
The first end of first zener diode and one end of 3rd resistor connect, another termination of the first zener diode
Ground；
One end of 3rd resistor is connect with first input end, and the first of the other end of 3rd resistor and the first zener diode
End connection；
One end of third capacitor is connect with first input end, and the first of the other end of third capacitor and the first zener diode
End connection；
The first end of third switching device is connect with the first input end of the input signal control module, third switching device
Second end connect with the first end of the first zener diode, the first end at the third end of third switching device and the 4th diode
And the second output terminal connection of the input signal control module；
The first end of 4th diode is connect with the third end of third switching device, and the other end of the 4th diode is defeated with this
Enter the third output end connection of signal control module；
The first input end and local terminal network interface connection of the input signal control module, the second of the input signal control module
Output end is connect with the 4th input terminal of the power receiving equipment detection module of local terminal network interface, and the third of the input signal control module is defeated
Outlet is connect with the third output end of the input signal control module of all network interfaces and power control module.
Preferably, the power control module, comprising:
5th diode, the 4th capacitor, the 4th switching device, the 5th switching device, the 6th switching device, the 7th derailing switch
Part, the second zener diode, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance and the tenth
Resistance and first input end, the second input/output terminal and third output end；
The first end of 5th diode is connect with the first input end of the power control module, the second end of the 5th diode
With the 4th capacitance connection；
One end of 4th capacitor is connect with the second end of the 5th diode, the other end ground connection of the 4th capacitor；
One end of 4th resistance connects the 4th capacitor and the connected one end of the 5th diode, the other end of the 4th resistance and the
The connection of five resistance；
One end of 5th resistance is connect with one end of the 4th resistance, the other end ground connection of the 5th resistance；
One end of 6th resistance connects the 4th capacitor and the connected one end of the 5th diode, the other end of the 6th resistance and the
The first end of two zener diodes connects；
The first end of second zener diode is connect with one end of the 6th resistance, another termination of the second zener diode
Ground；
The first end of 4th switching device is connect with one end of the 6th resistance, and the second end of the 4th switching device is connected to
The third end of one end that four resistance are connected with the 5th resistance, the 4th switching device is connect with the 7th resistance；
One end of 7th resistance is connect with the third end of the 4th switching device, the other end ground connection of the 7th resistance；
The first end of 5th switching device is grounded, and the second end of the 5th switching device and the third end of the 4th switching device connect
It connects, the third end of the 5th switching device is connect with the 8th resistance；
One end of 8th resistance is connect with the third end of the 5th switching device, and the other end of the 8th resistance and the tenth resistance connect
It connects；
The first end of 6th switching device is grounded, and the second end of the 6th switching device and the third end of the 5th switching device connect
It connects, the third end of the 6th switching device is connect with the 9th resistance；
One end of 9th resistance is connect with the third end of the 6th switching device, and the other end of the 9th resistance and the tenth resistance connect
It connects；
One end of tenth resistance is connect with the 9th resistance, and the other end of the tenth resistance and the first end of the 7th switching device connect
It connects；
The first end of 7th switching device and the second input/output terminal of the tenth resistance and the power control module connect
It connects, the second end of the 7th switching device is connect with the 9th resistance, third end and the power control module of the 7th switching device
The connection of third output end；
The first input end and local terminal network interface connection of the power control module, the second input/output of power control module
End connects with the second input/output terminal of the power control module of all network interfaces and the third output end of input signal control module
It connects.
Preferably, the output signal control module, comprising: the 6th diode, power supply unit PSE and input terminal and defeated
Outlet；
Wherein, one end of power supply unit PSE is connect with the input terminal of the output signal control module, power supply unit PSE's
The other end is connect with the first end of the 6th diode；
The first end of 6th diode is connect with power supply unit PSE, the second end of the 6th diode and the output signal control
The output end of molding block connects；
The output signal control module input terminal is connect with the third output end of the power control module of local terminal network interface, this is defeated
Signal control module output end and local terminal network interface connection out.
Preferably, the switching device is field effect transistor or relay.
Detailed description of the invention
Fig. 1 is a kind of operation principle schematic diagram of the POE distributor provided in the prior art；
Fig. 2 is a kind of functional block diagram of POE distributor provided in an embodiment of the present invention；
Fig. 3 is a kind of working principle structure chart of POE distributor provided in an embodiment of the present invention；
Fig. 4 is a kind of hardware circuit diagram of the power supply module of POE distributor provided in an embodiment of the present invention；
Fig. 5 is a kind of hardware circuit diagram of the PD detection module of POE distributor provided in an embodiment of the present invention；
Fig. 6 is a kind of hardware circuit diagram of the PD control module of POE distributor provided in an embodiment of the present invention；
Fig. 7 is a kind of hardware circuit diagram of POE distributor provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides a kind of Power over Ethernet POE distributor, with so that the POE distributor each net
Mouth may act as power supply network interface, can also be used as by power grid mouth so that POE distributor using more flexible, be not necessarily to
User distinguishes network interface.
Referring to fig. 2, a kind of POE distributor provided in an embodiment of the present invention, comprising:
Multiple network interfaces, each network interface are separately connected different power supply modules, power receiving equipment detection module, power receiving equipment control
Module, wherein each power receiving equipment detection module be connected to it is same by electric module；
Wherein, the power supply module of each network interface is all connect with the power supply module of other network interfaces, the power receiving equipment of each network interface
Detection module is all connect with the power receiving equipment detection module of other network interfaces, the power receiving equipment control module of each network interface respectively with its
The power receiving equipment detection module of his network interface connects；
For the power supply module, power receiving equipment detection module, power receiving equipment control module of any network interface, it is respectively provided with as follows
Function:
Power receiving equipment detection module, the detection signal for being sent when the power supply unit received through local terminal network interface, and
The control signal for being used to close this power receiving equipment detection module that the power receiving equipment control module of other network interfaces is sent is not received
When, which is sent to described by electric module, also, sent to the power receiving equipment control module of other network interfaces for closing
Close the control signal of the power receiving equipment control module of other network interfaces；
Power receiving equipment control module, the detection signal for being sent when the power supply unit received through local terminal network interface, and
The control signal for being used to close this power receiving equipment control module that the power receiving equipment detection module of other network interfaces is sent is not received
When, the control for closing the power receiving equipment detection module of other network interfaces is sent to the power receiving equipment detection module of other network interfaces
Signal；
Power supply module, for when receiving the power supply signal sent by the power supply unit of local terminal network interface, by the confession
Electric signal is supplied to the power supply module of other network interfaces；And when local terminal network interface connection power receiving equipment, receive other network interfaces
The power supply signal, is supplied to the power receiving equipment of local terminal network interface by the power supply signal that power supply module is sent by local terminal network interface.
Wherein, heretofore described POE distributor refers to by the improved POE distributor of the present invention, and the POE divides
Orchestration may include multiple network interfaces.Specifically, when POE distributor has a network interface access power supply unit PSE, and network interface reception
After the supply voltage sent to PSE, which is transmitted to other multiple network interfaces for the supply voltage, so that other network interfaces can be with
As power supply network interface, to connect power receiving equipment.
Power receiving equipment described in the embodiment of the present invention (PD) detection module, power receiving equipment (PD) control module, power supply mould
Block and by electric module it is based on being described by function, but is not limited only to circuit described in embodiment, as long as its effect and function
It can describe unanimously, can be achieved with certain chip or hardware programming device etc. in each functional module.
The embodiment of the present invention is not limited to POE distributor and there was only 3 network interfaces so that POE distributor has 3 network interfaces as an example,
There can be more than 3 network interfaces, there can also be 2 network interfaces, network interface data is without limiting.
It should be noted that detection signal described in the embodiment of the present invention includes 4V detection signal and 20V graded signal.
Wherein, the power receiving equipment detection module, comprising: first switch device, first resistor, first capacitor, the one or two
Pole pipe and first input end, the second input terminal, third output end and the 4th input terminal；
Wherein, the first end of first switch device is connect with the first input end of the power receiving equipment detection module, and first opens
The second end for closing device is connect with the second input terminal of first resistor and the power receiving equipment detection module, first switch device
Third end is connect with the third output end of the power receiving equipment detection module；
One end of first resistor is connect with the second end of the first switch device, the other end ground connection of first resistor；
One end of first capacitor is connect with the second end of the first switch device, the other end ground connection of first capacitor；
The first end of first diode is connect with the 4th input terminal of the power receiving equipment detection module, first diode it is another
One end is connect with the second end of the first switch device；
The first input end and local terminal network interface connection of the power receiving equipment detection module, the second of the power receiving equipment detection module
Input terminal is connect with the power receiving equipment control module of other network interfaces；The third output end of the power receiving equipment detection module respectively with its
The power receiving equipment control module of his network interface, the power receiving equipment detection module of other network interfaces are connected, are connected by electric module；It should be set by electricity
4th input terminal of standby detection module is connect with the power supply module of local terminal network interface.
When the first input end of power receiving equipment detection module receives the detection sent by the power supply unit of local terminal network interface
Signal, and the second input terminal of the power receiving equipment detection module does not receive the power receiving equipment control module transmission of other network interfaces
When for closing the control signal of this power receiving equipment detection module, the first end of first switch device is connected with third end, third
End by the third output end of the power receiving equipment detection module, by the detection signal be sent to rear class by electric module, also, to
The power receiving equipment control module of other network interfaces sends the control signal for closing the power receiving equipment control module of other network interfaces.
Wherein, the power receiving equipment control module, including power receiving equipment control submodule corresponding with other each network interfaces；
Wherein, power receiving equipment control submodule, the detection for being sent when the power supply unit received through local terminal network interface
Signal, and the control for being used to close this power receiving equipment control module that the power receiving equipment detection module for not receiving other network interfaces is sent
When signal processed, the power receiving equipment for closing the network interface is sent to the power receiving equipment detection module of corresponding other network interfaces and is examined
Survey the control signal of module.
Specifically, the power receiving equipment control submodule, comprising: second switch device, the second diode, the three or two pole
Pipe, second resistance, the second capacitor and first input end, the second input/output terminal, third output end and the 4th input terminal；
Wherein, the first end of second switch device is connect with the first input end of the power receiving equipment control submodule, and second
The second end of switching device is connect with the second input/output terminal of second resistance and the power receiving equipment control submodule, and second
The third end of switching device is connect with the first end of the second diode；
The first end of second diode is connect with the third end of the second switch device, the other end of the second diode with
The third output end of the power receiving equipment control submodule connects；
The first end of third diode is connect with the 4th input terminal of the power receiving equipment control submodule, third diode
The other end is connect with the second end of the second switch device；
One end of second resistance is connect with the second end of the second switch device, the other end ground connection of second resistance；
One end of second capacitor is connect with the second end of the second switch device, the other end ground connection of the second capacitor；
The first input end and local terminal network interface connection of the power receiving equipment control submodule, the power receiving equipment control submodule
Second input/output terminal controls mould with the power receiving equipment of the power receiving equipment detection module of other network interface, other network interfaces respectively
Block connection；The third output end of the power receiving equipment control submodule respectively with the power receiving equipment detection module of other network interfaces, other
The power receiving equipment control module of network interface connects；4th input terminal of the power receiving equipment control submodule and the power supply mould of local terminal network interface
Block connection.
When the first input end of power receiving equipment control submodule receives the inspection sent by the power supply unit of local terminal network interface
Signal is surveyed, and the second input/output terminal of the power receiving equipment control module does not receive the power receiving equipment detection mould of other network interfaces
When the control signal for being used to close this power receiving equipment control module that block is sent, first end and the third end of second switch device are led
Logical, third end passes through the third output end of the power receiving equipment control module, to the of the power receiving equipment detection module of other network interfaces
Two input terminals send the control signal for closing the power receiving equipment detection module of other network interfaces.
Wherein, the power supply module, comprising: power control module, input signal control module and output signal control mould
Block；
Wherein, input signal control module, the power supply signal that the power supply unit for receiving through local terminal network interface is sent, and
The power supply signal is supplied to the 4th input terminal of the power receiving equipment detection module of local terminal network interface, power receiving equipment control module
The power control module of 4th input terminal and all network interfaces；
Power control module, for receiving the power supply signal of input signal control module transmission, and by the power supply signal
It is supplied to output signal control module, and when local terminal network interface connection power receiving equipment, receives the power supply module hair of other network interfaces
The power supply signal sent；
Output signal control module, the power supply signal sent for receiving power control module, and when local terminal network interface connects
When receiving electric equipment, which is supplied to the power receiving equipment of local terminal network interface connection by local terminal network interface.
Wherein, the input signal control module, comprising:
First zener diode, 3rd resistor, third capacitor, third switching device, the 4th diode and the first input
End, second output terminal and third output end；
The first end of first zener diode and one end of 3rd resistor connect, another termination of the first zener diode
Ground；
One end of 3rd resistor is connect with first input end, and the first of the other end of 3rd resistor and the first zener diode
End connection；
One end of third capacitor is connect with first input end, and the first of the other end of third capacitor and the first zener diode
End connection；
The first end of third switching device is connect with the first input end of the input signal control module, third switching device
Second end connect with the first end of the first zener diode, the first end at the third end of third switching device and the 4th diode
And the second output terminal connection of the input signal control module；
The first end of 4th diode is connect with the third end of third switching device, and the other end of the 4th diode is defeated with this
Enter the third output end connection of signal control module；
The first input end and local terminal network interface connection of the input signal control module, the second of the input signal control module
Output end is connect with the 4th input terminal of the power receiving equipment detection module of local terminal network interface, and the third of the input signal control module is defeated
Outlet is connect with the third output end of the input signal control module of all network interfaces and power control module.
When the first input end of input signal control module receives the power supply sent by the power supply unit of local terminal network interface
When signal, the first end of third switching device is connected with third end, and third end is defeated by the third of the input signal control module
The power supply signal is supplied to the power control module of all network interfaces by outlet, and pass through the input signal control module
Two output ends are supplied to the power receiving equipment control of the 4th input terminal and local terminal network interface of the power receiving equipment detection module of local terminal network interface
4th input terminal of module.
Wherein, the power control module, comprising:
5th diode, the 4th capacitor, the 4th switching device, the 5th switching device, the 6th switching device, the 7th derailing switch
Part, the second zener diode, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance and the tenth
Resistance and first input end, the second input/output terminal and third output end；
The first end of 5th diode is connect with the first input end of the power control module, the second end of the 5th diode
With the 4th capacitance connection；
One end of 4th capacitor is connect with the second end of the 5th diode, the other end ground connection of the 4th capacitor；
One end of 4th resistance connects the 4th capacitor and the connected one end of the 5th diode, the other end of the 4th resistance and the
The connection of five resistance；
One end of 5th resistance is connect with one end of the 4th resistance, the other end ground connection of the 5th resistance；
One end of 6th resistance connects the 4th capacitor and the connected one end of the 5th diode, the other end of the 6th resistance and the
The first end of two zener diodes connects；
The first end of second zener diode is connect with one end of the 6th resistance, another termination of the second zener diode
Ground；
The first end of 4th switching device is connect with one end of the 6th resistance, and the second end of the 4th switching device is connected to
The third end of one end that four resistance are connected with the 5th resistance, the 4th switching device is connect with the 7th resistance；
One end of 7th resistance is connect with the third end of the 4th switching device, the other end ground connection of the 7th resistance；
The first end of 5th switching device is grounded, and the second end of the 5th switching device and the third end of the 4th switching device connect
It connects, the third end of the 5th switching device is connect with the 8th resistance；
One end of 8th resistance is connect with the third end of the 5th switching device, and the other end of the 8th resistance and the tenth resistance connect
It connects；
The first end of 6th switching device is grounded, and the second end of the 6th switching device and the third end of the 5th switching device connect
It connects, the third end of the 6th switching device is connect with the 9th resistance；
One end of 9th resistance is connect with the third end of the 6th switching device, and the other end of the 9th resistance and the tenth resistance connect
It connects；
One end of tenth resistance is connect with the 9th resistance, and the other end of the tenth resistance and the first end of the 7th switching device connect
It connects；
The first end of 7th switching device and the second input/output terminal of the tenth resistance and the power control module connect
It connects, the second end of the 7th switching device is connect with the 9th resistance, third end and the power control module of the 7th switching device
The connection of third output end；
The first input end and local terminal network interface connection of the power control module, the second input/output of power control module
End connects with the second input/output terminal of the power control module of all network interfaces and the third output end of input signal control module
It connects.
When the first input end of power control module receives the power supply signal that input signal control module is sent, the 7th is opened
The first end for closing device is connected with third end, and third end passes through the third output end of the power control module, by described for telecommunications
Number it is supplied to output signal control module, and when local terminal network interface connection power receiving equipment, passes through the second of power control module
Input/output terminal receives the power supply signal that the power supply module of other network interfaces is sent.
Wherein, output signal control module, comprising: the 6th diode, power supply unit PSE and input terminal and output end；
One end of power supply unit PSE is connect with the input terminal of the output signal control module, the other end of power supply unit PSE
It is connect with the first end of the 6th diode；
The first end of 6th diode is connect with power supply unit PSE, the second end of the 6th diode and the output signal control
The output end of molding block connects；
The output signal control module input terminal is connect with the third output end of the power control module of local terminal network interface, this is defeated
Signal control module output end and local terminal network interface connection out.
The power supply signal that power control module is sent is received by output signal control module input terminal, and works as local terminal net
When mouth connection power receiving equipment, which is supplied to local terminal net by local terminal network interface for the power supply signal
The power receiving equipment of mouth connection.
Wherein, either switch device described in the embodiment of the present invention can be field effect transistor or relay.
In the embodiment of the present invention by taking POE distributor there are 3 network interfaces as an example, the design of hardware circuit is described in detail.
The effect of the POE distributor modules is described in detail in embodiment 1 from function and operation process.Wherein, this hair
Bright detection signal as described in the examples includes 4V detection signal and 20V graded signal.
Embodiment 1
Referring to fig. 2, the functional block diagram of a kind of POE distributor provided in an embodiment of the present invention, comprising:
3 network interfaces, each network interface are separately connected different power supply modules, power receiving equipment (PD) detection module, power receiving equipment
(PD) control module, wherein each PD detection module is connected to one by electric module.
Wherein, the power supply module of each network interface is all connect with the power supply module of other network interfaces, and the PD of each network interface detects mould
Block is all connect with the PD detection module of other network interfaces, the PD control module of each network interface respectively with the PD detection module of other network interfaces
Connection.
When network interface 1 connects PSE, then PSE is sent to network interface 1 and detects signal, and when network interface 2 connects PSE, then PSE is sent to net
Mouth 2 detects signals, wherein and according to the chronological order of network interface connection PSE device, PSE is successively sent to network interface detection signal,
So the detection signal is sent to corresponding network interface according to Time priority.
For example, then PSE is first sent to network interface 1 and detects signal when network interface 1 first connects PSE, which is sent to simultaneously
The power supply module of network interface 1, PD detection module, PD control module.When the PD detection module of network interface 1 receives the inspection of the transmission of network interface 1
When surveying signal, which is sent to the detection signal by electric module.The PD detection module is to network interface 2 and network interface simultaneously
3 PD control module sends the control signal for closing the PD control module of the network interface 2 and network interface 3.
When the PD control module of network interface 1 receives the detection signal of the transmission of network interface 1, the PD control module is to 2 He of network interface
The PD detection module of network interface 3 sends the control signal for closing the PD detection module of the network interface 2 and network interface 3.
When the power supply module of network interface 1 receives the detection signal of the transmission of network interface 1, which rejects network interface 2
The supply voltage provided with network interface 3, so that network interface 1 completes original detection, power supply process.
When network interface 1 is completed to detect, when PSE is sent to 1 power supply signal of network interface, the power supply module of network interface 1 receives what PSE was sent
Power supply signal, while the power supply signal being supplied to the power supply module of network interface 2 and network interface 3.Meanwhile PSE is sent to the power supply of network interface 1
The input terminal of signal, network interface 1 is sent to the PD detection module and PD control module of network interface 1 for closing the PD detection module and PD
The control signal of control module.
In conclusion first connect PSE when network interface 2, then PSE is first sent to network interface 2 and detects signal, working principle with it is above-mentioned
1 principle of network interface is identical.
Specifically, for the workflow of network interface 1,2 and 3, it may refer to step described in Fig. 3.
Referring to Fig. 3, a kind of POE distributor working principle provided in an embodiment of the present invention, comprising steps of
S301, it detects whether this network interface connects PSE, if so, executing S302, otherwise, executes S303；
S302, it other network interfaces is judged whether there is is in detection-phase, if so, executing S305, otherwise, execute S306；
S303, judge whether that other network interfaces are completed by electricity, if so, executing S304, otherwise, return to S301；
S304, this network interface start supplying power for outside；
The control for being used to close this network interface PD detection module that S305, this network interface receiving area are sent in the network interface of detection-phase
Signal, for blocking the detection signal of this network interface to be sent to by electric module；
S306, PSE start to detect this network interface；
S307, this network interface PD detection module to the PD control module of other network interfaces send for closing other network interfaces
The control signal of PD control module, meanwhile, the PD control module of this network interface is sent to the PD detection module of other network interfaces for closing
Close the control signal of the PD detection module of other network interfaces；
S308, the power supply signal that PSE is provided is received, completes to provide the power supply signal by electricity, while to other network interfaces.
Based on the description of above-mentioned functional module and workflow to POE distributor, following example 2 and embodiment 3 will
The physical circuit design of the functional module of the POE distributor is described in detail.
It should be noted that in the embodiment of the present invention, the power supply module of each network interface, PD detection module, PD control module
Difference, but the power supply module function of each network interface is just the same, and circuit design is the same, and equally, the PD of each network interface detects mould
Block function is just the same, and circuit design is the same, and the PD control functions of modules of each network interface is just the same, circuit design one
Sample.
Embodiment 2 will be described in the hardware circuit design of power supply module, PD detection module and PD control module, and with net
Its working principle is described in detail in circuit design corresponding to mouth 1.Wherein, the present invention implements switching device described in 2 as field effect
Transistor is answered, and the conducting voltage of the field effect transistor is 2V.
Embodiment 2
Referring to fig. 4, the power supply module in POE distributor provided in an embodiment of the present invention, including input signal control module,
Power control module and output signal control module.
Wherein, input signal control module includes: resistance R11, zener diode D15, capacitor C13, P-channel field-effect transistor (PEFT) crystalline substance
Body pipe Q11, diode D12 and first input end, second output terminal and third output end.
One end of resistance R11 is connect with the first input end of input signal control module, the other end of resistance R11 and pressure stabilizing
The first end of diode D15 connects；
The first end of zener diode D15 is connect with resistance R11, the second end ground connection of zener diode D15；
Capacitor C13 is in parallel with resistance R11；
The source S of P-channel field-effect transistor (PEFT) transistor Q11 is connect with the first input end of input signal control module, and grid G connects
Ground, drain D are connect with the second output terminal of the first end of diode D12 and input signal control module, and the tie point is
H；
The first end of diode D12 and the drain D of Q11 connect, the second end of D12 and the third of input signal control module
Output end connection.
The first input end of input signal control module is connect with network interface 1, the third output end of input signal control module
Second input/output terminal of power control module connects.
Wherein, power control module, comprising: resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, resistance
R20, resistance R21, diode D19, zener diode D20, capacitor C16, P-channel field-effect transistor (PEFT) transistor Q15 and Q18, N-channel field
Effect transistor Q16 and Q17 and first input end, the second input/output terminal and third output end.
The first end of diode D19 is connect with power control module first input end, the other end and capacitor of diode D19
One end of C16 connects, and power control module first input end is connect with the input terminal of network interface 1, and wherein the input terminal of network interface 1 is figure
A point in 4；
One end of capacitor C16 is connect with the second end of diode D19, which is J, and the other end of capacitor C16 is grounded；
One end that one end connection diode D19 of resistance R15 is connected with capacitor C16, the other end and resistance of resistance R15
R16 connection, wherein the tie point of resistance R15 and R16 are K point；
One end of resistance R16 is connect with resistance R15, the other end ground connection of resistance R16；
One end of resistance R17 is connect with the drain D of P-channel field-effect transistor (PEFT) transistor Q15, the other end ground connection of resistance R17；
The source S of P-channel field-effect transistor (PEFT) transistor Q15 is connect with resistance R18, the grid G connection resistance R16 and resistance of Q15
R15 connected one end, the drain D of Q15 are connect with resistance R17, wherein the point that drain D is connect with resistance R17 is M；
One end one end for being connected with capacitor C16 connection resistance R15 of resistance R18, i.e. J point, the other end of resistance R18 with surely
Press the first end connection of diode D20；
The first end of zener diode D20 is connect with resistance R18, zener diode D20 second end ground connection, wherein D20's
The tie point of first end and resistance R18 are L；
The source S of N-channel field effect transistor Q16 is grounded, and the grid G of Q16 and the drain D of Q15 connect, the drain D of Q16
It is connect with resistance R19, wherein the tie point of drain D and resistance R19 are N；
One end of resistance R19 and the drain D of Q16 connect, and the other end of resistance R19 and the source S of Q18 connect；
The source S of N-channel field effect transistor Q17 is grounded, and the grid G of Q17 and the drain D of Q16 connect, the drain D of Q17
It is connect with resistance R20；
One end of resistance R20 and the drain D of Q17 connect, and the other end of resistance R20 and the grid G of Q18 connect；
One end of resistance R21 is connect with one end of resistance R20, the other end and P-channel field-effect transistor (PEFT) transistor of resistance R21
The source S of Q18 connects；
The source S and resistance R21 of P-channel field-effect transistor (PEFT) transistor Q18 and the second input/output terminal of power control module
Connection, the grid G of Q18 are connect with resistance R20, and the drain D of Q18 and the third output end of power control module connect, wherein source
The tie point of pole S and resistance R21 are P, and the tie point of grid G and resistance R20 are O, the second input/output of power control module
For the B point in Fig. 4.
Specifically, the first input end of power control module is connect with network interface 1, power control module second input/it is defeated
Outlet is connect with the third output end of input signal control module, and the third output end and output signal of power control module control
The input terminal of module connects.
Wherein, output signal control module, comprising: diode D11, power supply unit PSE1 and input terminal and output end.
Wherein, one end of PSE1 is connect with the input terminal of output signal control module, the other end and diode D11 of PSE1
First end connection, and the third output end of the input terminal of output signal control module and power control module connect；
The first end of diode D11 and one end of PSE1 connect, the second end and output signal control module of diode D11
Output end connection, and the output end of output signal control module is connect with network interface 1.
The input terminal of output signal control module and the third output end of power control module connect, and output signal controls mould
The output end of block is connect with network interface 1.
Divide below briefing power control module first input end, the second input/output terminal, third output end signal it
Between relationship.
Assuming that resistance R15 and resistance R16 are equal, the resistance of resistance R17 is far longer than the resistance value of resistance R18, false
If resistance R20 and resistance R21 are equal, zener diode D15 is 40V, and zener diode D20 is 20V.
Situation one:
When A sends the detection graded signal of 4~20V, which charges to capacitor C16 by diode D19, together
When will not be reversely put because signal voltage becomes 0 when capacitor C16 is charged to ceiling voltage due to the presence of diode D19
Electricity, and it is held in the ceiling voltage of charging, so, diode D19 and capacitor C16 in circuit constitute peak detection electricity
Road can allow J point voltage to be maintained at 4~20V.So by the partial pressure of resistance R15 and resistance R16, so that K point voltage is maintained at
2~10V.Because J point is 4~20V, zener diode D20 shutdown.
The source S voltage (L) of P-channel field-effect transistor (PEFT) transistor Q15 and the pressure difference of grid G voltage (K) they are 2~10V, so
The source S and drain D of Q15 is connected, then M point voltage is 4~20V.Wherein, because the resistance value of resistance R17 is far longer than resistance R18
Resistance value, so resistance R18 partial pressure be almost 0.
The pressure difference of the grid G voltage (M) of N-channel field effect transistor Q16 and source S voltage (ground voltage 0) is 4~
20V, so the source S of Q16 and drain D conducting, then N point voltage is 0.
The grid G voltage (N) and source S voltage (ground voltage 0) of N-channel field effect transistor Q17 is 0, so Q17
Shutdown.
The pressure difference of P-channel field-effect transistor (PEFT) transistor Q18 source S voltage (P) and grid G voltage (O) are 0, so Q18 is turned off.
Obviously, when A sends the detection graded signal of 4~20V, because Q18 is turned off, so that power supply module, PSE does not have
The voltage signal that the first end A of voltage and power supply module that signal output, i.e. the third end B of power supply module provide is provided, not
This can be made by electric the 4th end output voltage signal of module.So PSE cannot receive any voltage signal that B and A is provided.
Situation two:
When A sends the voltage signal of 20~36V, which charges to capacitor C16 by diode D19, simultaneously
Due to the presence of diode D19, when capacitor C16 is charged to ceiling voltage, will not reversely be put because signal voltage becomes 0
Electricity, and it is held in the ceiling voltage of charging, so, diode D19 and capacitor C16 in circuit constitute peak detection electricity
Road can allow J point voltage to be maintained at 20~36V.So by the partial pressure of resistance R15 and resistance R16, so that K point voltage is kept
In 10~18V.Because J point is 20~36V, zener diode D20 is connected, and zener diode D20 both end voltage is maintained at
20V, i.e. L point voltage are 20V.
The source S voltage (L) of P-channel field-effect transistor (PEFT) transistor Q15 and the pressure difference of grid G voltage (K) they are 2~10V, so
The source S and drain D of Q15 is connected, then M point voltage is 20V.
The grid G voltage (M) and the pressure difference of source S voltage (ground voltage 0) of N-channel field effect transistor Q16 is
20V, so the source S of Q16 and drain D conducting, then N point voltage is 0.
The grid G voltage (N) and source S voltage (ground voltage 0) of N-channel field effect transistor Q17 is 0, so Q17
Shutdown.
The pressure difference of P-channel field-effect transistor (PEFT) transistor Q18 source S voltage (P) and grid G voltage (O) are 0, so Q18 is turned off.
Obviously, when A sends the voltage signal of 20~36V, because Q18 is turned off, so that the PSE of power supply module does not have signal
The voltage signal that the first end A of voltage and power supply module that output, i.e. the third end B of power supply module provide is provided, cannot all make
It should be by electric the 4th end output voltage signal of module.So PSE cannot receive any voltage signal that B and A is provided.
Situation three:
When A sends the voltage signal for being greater than 36V, J point voltage is maintained at greater than 36V.So by resistance R15 and resistance
The partial pressure of R16, so that K point voltage is greater than 18V.Because J point voltage is greater than 36V, zener diode D20 conducting, and the pressure stabilizing two
Pole pipe D20 both end voltage is maintained at 20V, i.e. L point voltage is 20V.
The source S voltage (L) of P-channel field-effect transistor (PEFT) transistor Q15 and the pressure difference of grid G voltage (K) are less than 2V, so Q15
Source S and drain D shutdown, then M point voltage be 0V.
The grid G voltage (M) of N-channel field effect transistor Q16 and the pressure difference of source S voltage (ground voltage 0) are 0V,
So the source S and drain D of Q16 turn off, then N point voltage is B point voltage.
When B point voltage is greater than 4V, grid G voltage (B) and source S the voltage (ground connection of N-channel field effect transistor Q17
Voltage is 0) to be greater than 4V, so the source S of Q17 is connected with drain D.When the voltage of B point is less than 4V, Q17 shutdown.
When the source S of Q17 is connected with drain D, then P-channel field-effect transistor (PEFT) transistor Q18 source S voltage (B) and grid G voltage
(O) pressure difference is greater than 2V, so the source S of Q18 is connected with drain D.When Q17 is turned off, then Q18 is turned off.
Obviously, when A send be greater than 36V voltage signal when, and B point voltage be greater than 4V when, then Q18 source S is led with drain D
It is logical.PSE can receive any voltage signal that B and A is provided.
Situation four:
When A sends the voltage signal for being less than 4V, J point voltage is less than 4V.So by point of resistance R15 and resistance R16
Pressure, so that K point voltage is less than 2V.So P-channel field-effect transistor (PEFT) transistor Q15 is turned off, M point voltage is 0V.
The grid G voltage (M) of N-channel field effect transistor Q16 and the pressure difference of source S voltage (ground voltage 0) are 0,
So Q16 is turned off.
The voltage value of the grid G voltage (N) of N-channel field effect transistor Q17 is B point voltage value.When the voltage of B is greater than
4V, then the source S of Q17 is connected with drain D.When the voltage of B is less than 4V, then source S Yu the drain D shutdown of Q17.
When the source S of Q17 is connected with drain D, then P-channel field-effect transistor (PEFT) transistor Q18 source S voltage (P) is that B point voltage is big
In 4V.Since the partial pressure of resistance R20 and resistance R21 act on, grid G voltage (O) is greater than 2V, so Q18 source S and drain D
Conducting.When the source S and drain D of Q17 turn off, then Q18 source S and drain D turn off.
Obviously, when A sends the voltage signal for being less than 4V, and when B point voltage is greater than 4V, then Q18 source S and drain D
Conducting.PSE can receive any voltage signal that B and A is provided.
To sum up described in four kinds of situations, when A sends 4~36V voltage, because Q18 source S and drain D turn off, so that PSE
It cannot receive any voltage signal that B and A is provided；It is less than 4V or greater than the voltage of 36V when A is sent, and B point voltage is greater than 4V
When, then Q18 source S is connected with drain D, and PSE is enabled to receive any voltage signal that B and A is provided.
PD detection module referring to Fig. 5, in POE distributor provided in an embodiment of the present invention, comprising: P-channel field-effect transistor (PEFT) is brilliant
Body pipe Q12, diode D14, resistance R12 and capacitor C11 and first input end, the second input terminal, third output end and the 4th
Input terminal.
Wherein, the source S of P-channel field-effect transistor (PEFT) transistor Q12 is connect with the first input end of PD detection module, the grid of Q12
Pole G is connect with the second input terminal of resistance R12 and the PD detection module, and the drain D of Q12 and the third of PD detection module export
End connection, and the tie point of grid G and resistance R12 are E；
The first end of diode D14 is connect with the 4th input terminal of the PD detection module, the second end of diode D14 with
The grid G of Q12 connects；
One end of resistance R12 and the grid G of Q12 connect, the other end ground connection of resistance R12；
One end of capacitor C11 and the grid G of Q12 connect, the other end ground connection of capacitor C11.
Wherein, referring to shown in Fig. 5, the first input end of PD detection module is A, and the second input terminal is E, third output end
For C, the 4th input terminal is H.
The working principle of PD detection module is described below in detail.
Specifically, the first input end A connection network interface 1 of PD detection module, the 4th input terminal connect the power supply module of network interface 1
The second output terminal of middle input signal control module, third output end connect the PD control module of network interface 2 and network interface 3.Wherein, when
When network interface 1 connects PSE, A first sends 4V detection signal, then sends 20V graded signal, finally sends 48V burning voltage signal.
So the 4th input terminal H voltage is 0V when first input end receives 4V the 20V signal that A is sent.
When the first input end of PD detection module, which receives the 4V that A is sent, detects signal, the 4th input terminal input voltage is
0V, and the second input terminal input voltage is also 0V, then the source S voltage of P-channel field-effect transistor (PEFT) transistor Q12 is 4V, grid G voltage
For 0V, so the source S of Q12 and drain D conducting, 4V detection signal is sent third output end C, third output by drain D
End by the 4V detection signal be sent to rear class by electric module, while by the 4V detection signal be sent to network interface PD control module
Third output end, the control signal of the PD control module for closing network interface 2 and network interface 3.
When the first input end of PD detection module, which receives the 20V that A is sent, detects signal, the 4th input terminal input voltage is
0V, and the second input terminal input voltage is also 0V, then the source S voltage of P-channel field-effect transistor (PEFT) transistor Q12 is 20V, grid G electricity
Pressure is 0V, so 20V detection signal is sent third output end C by the source S of Q12 and drain D conducting, drain D.Third is defeated
Outlet C by the 20V detection signal be sent to rear class by electric module, while by the 20V detection signal be sent to PD control mould
Block third output end.
When the first input end of PD detection module, which receives the 4V that A is sent, detects signal, the 4th input terminal input voltage is
0V, and the second input terminal input voltage is 4V, then source S and the drain D shutdown of Q12.
So the second input terminal of the PD detection module of network interface 1 can receive the PD control module hair of network interface 2 and network interface 3
That send is used to close the control signal of PD detection module, which is the detection signal of 4V voltage.It should be noted that working as
When network interface 1 preferentially receives the 4V detection signal of A transmission, it would not be used for by what the PD control module of network interface 2 and network interface 3 was sent
The control signal of PD detection module is closed, because of the PD control of network interface 2 and network interface 3 of PD control module priority acccess control in network interface 1
Molding block.
PD control module referring to Fig. 6, in POE distributor provided in an embodiment of the present invention, comprising: P-channel field-effect transistor (PEFT) is brilliant
Body pipe Q14, diode D16, diode D18, resistance R14 and capacitor C12 and first input end, the second input/output terminal,
Third output end and the 4th input terminal.
Wherein, PD control module, further includes: P-channel field-effect transistor (PEFT) transistor Q13, diode D17, diode D19, resistance
R13 and capacitor C15.
As shown in Figure 6, P-channel field-effect transistor (PEFT) transistor Q14, diode D16, diode D18, resistance R14 and capacitor C12
The connection relationship of composition, with P-channel field-effect transistor (PEFT) transistor Q13, diode D17, diode D19, resistance R13 and capacitor C15 group
At connection relationship it is identical.
Because POE distributor is described in the embodiment of the present invention by taking 3 network interfaces as an example, PD control mould in network interface 1
The circuit that P-channel field-effect transistor (PEFT) transistor Q14, diode D16, diode D18, resistance R14 and the capacitor C12 of block are formed, is used for
Control the PD detection module of network interface 3；P-channel field-effect transistor (PEFT) transistor Q13, diode D17, diode D19, resistance R13 and capacitor
The circuit of C15 composition, for controlling the PD detection module of network interface 2, and control principle is identical.
Wherein, the source S of P-channel field-effect transistor (PEFT) transistor Q14 is connect with the first input end of PD control module, the grid of Q14
Pole G is connect with the second input/output terminal of resistance R14 and PD control module, the drain D of Q14 and the first end of diode D18
Connection, wherein the tie point of grid G and resistance R14 are I；
The first end of diode D16 is connect with the 4th input terminal of PD control module, the second end and Q14 of diode D16
Grid G connection；
The first end of diode D18 and the drain D of Q14 connect, the second end of diode D18 and the third of PD control module
Output end connection；
One end of resistance R14 and the grid G of Q14 connect, the other end ground connection of resistance R14；
One end of capacitor C12 and the grid G of Q14 connect, the other end ground connection of capacitor C12.
Wherein, the 4th input terminal of 1 input terminal of first input end A connection network interface of PD control module, PD control module connects
Connect the input signal control module of power supply module, the of the PD control module of the third output end connection network interface 2 of PD control module
Three output ends, and connect the third output end of the PD detection module of network interface 3.
The working principle of PD control module is described below in detail.
When PD control module first input end receives the detection signal of the 4V sent by the power supply unit of network interface 1,
And the second input/output terminal of PD control module do not receive that the PD detection module of network interface 3 sends for closing the PD control
The control signal of module, i.e. I point voltage are 0, then the source S of Q14 is connected with drain D, drain D by the detection signal of the 4V, to
The third output end of the PD detection module of network interface 3 is sent, for closing the PD detection module of network interface 3, so that network interface 1 is in detection
Stage, and forbid receiving the control signal of other network interfaces transmission.
Similarly, it is made of P-channel field-effect transistor (PEFT) transistor Q13, diode D17, diode D19, resistance R13 and capacitor C15
Circuit, for controlling the PD detection module of network interface 2, so that network interface 1 is in detection-phase and will not be controlled by network interface 2.
Similarly, when PD control module first input end receives the detection letter of the 20V sent by the power supply unit of network interface 1
Number when, principle is identical, as a result identical, all makes network interface 1 alone in the classification stage, and forbid receiving the control of other network interfaces transmission
Signal processed.
The POE distributor provided in the embodiment of the present invention, further includes: P-channel field-effect transistor (PEFT) transistor Q11, zener diode
D15, diode D12, resistance R11 and capacitor C13.
Embodiment 3
The working principle of the detailed description POE distributor of embodiment 3.
Referring to Fig. 7, a kind of POE distributor provided in an embodiment of the present invention, including network interface 1, network interface 2 and network interface 3.
Wherein, QX (X indicates number) represents field effect transistor, is divided into P-channel field-effect transistor (PEFT) transistor PMOS and N-channel field
Effect transistor NMOS, wherein the effect of PMOS is when grid G step voltage is lower than source S grade certain value, and S and D are connected,
The effect of NMOS is S and D conducting when grid G step voltage is higher than source S grade certain value, assumes to lead in the embodiment of the present invention
The pressure that is powered is 2V, otherwise S and D shutdown；RX represents resistance；CX represents capacitor；DX represents diode, and effect is when its forward direction pressure
When drop is greater than certain value, conducting, it is assumed herein that 0.7V, otherwise it is in an off state always；D15,D25,D35,D20,
D30, D40 are zener diodes, and effect is exactly when its both end voltage is higher than certain value, and both end voltage can be forced to maintain
Assume that D15, D25, D35 are 40V to the particular value, in the embodiment of the present invention, D20, D30, D40 are 20V, otherwise zener diode
It is in an off state.
The working principle of network interface 1 is described below in detail, other network interface working principles are identical.
When network interface 1 connects upper POE interchanger, network interface 2 and network interface 3 do not connect POE interchanger, and POE interchanger is first
It sends 4V and detects signal, then send 20V graded signal, finally send 48V power supply signal.
As shown in Figure 7, signal is detected when POE interchanger sends 4V, then A point voltage is 4V.Because of zener diode D15
For 20V, so D15 is turned off, then the source S voltage value of Q11 is identical as grid G voltage value, Q11 shutdown, so that diode D12,
D14, D16, D17 shutdown, so H point voltage is 0, while E point, F point and I point voltage are 0.
Because the 4th input terminal (E) voltage of PD detection module is 0V, then the first input end of PD detection module receives 4V
When detecting signal, Q12 conducting, the third output end of PD detection module by the detection signal be sent to rear class by electric module,
Meanwhile the detection signal is sent to the second of the PD control module of network interface 2 and network interface 3 by the third output end of PD detection module
Input/output terminal, for closing the PD control module of network interface 2 and network interface 3.
Meanwhile PD control module the 4th input terminal (I and F) voltage is 0V, so Q13 and Q14 are respectively turned on, 4V detection letter
The second input terminal of the PD detection module of network interface 2 number is sent to by Q13, i.e. E1 point in Fig. 7 is sent to network interface 3 by Q14
PD detection module the second input terminal be point E2.
We are described in detail by taking the E1 in network interface 2 as an example: the signal of 4V can be to by capacitor C21 and diode D12 group
At peak-detector circuit charge, so that the E1 point of capacitor C21 is maintained ceiling voltage after charging, and due to resistance
The presence of R22, although C21 can keep the maximum charging voltage of a period of time, the capacitor C21 when not charging for a long time
It can be discharged by resistance R22, capacitor C21 can also return 0 with voltage after guaranteeing long-time.For example, when network interface 1 is in detection-phase
When, E1 point can be maintained the voltage of 4V, and this guarantees the 4V when network interface 2 connects another POE interchanger simultaneously, issued
Detection signal will not be such that the Q22 in PD detection module is connected, so the detection signal in network interface 2 will not be sent to rear class by electric mould
Block avoids detection conflict.
Similarly network interface 3 will not be with 1 phase conflict of network interface.
With should the POE interchanger of network interface 1 send 20V graded signal when, graded signal that network interface 2 and network interface 3 are sent
It will not be with 1 phase conflict of network interface.
After the POE interchanger of network interface 1 completes 4V detection and 20V classification process, the power supply signal of 48V is sent to network interface 1
Input terminal, i.e. A point voltage be 48V.Because 48V power supply signal is more than the 40V pressure stabilizing value of D15, thus make the source S of Q11 with
Grid G voltage difference is 8V (48-40=8V), so Q11 is connected, so H point voltage is 48V, while E point, F point and I point voltage
For 48V.So Q12, Q13, Q14 are turned off, i.e. PD detection module and PD control module does not work, and network interface 1 does not reconnect rear class
By electric module.
Because A point voltage is 48V, the first input end of power control module inputs 48V voltage.Again because of H point electricity
Pressure is 48V, so the third input terminal (P point) in power control module receives the power supply signal of 48V.It is retouched according in embodiment 2
The power supply module working principle stated, it is known that, when A is sent less than 4V or greater than the voltage of 36V, and B point voltage is greater than 4V, then
Q18 source S is connected with drain D, and PSE is enabled to receive any voltage signal that B and A is provided.
Because 48V is greater than 36V, the Q18 source S in power control module is connected with drain D, and PSE is enabled to receive A
The 48V power supply signal of offer.Meanwhile the 48V power supply signal being sent to the power supply in network interface 2 and network interface 3 by diode D12
The third input terminal of module, so network interface 1 is by power grid mouth, network interface 2 and network interface 3 are power supply network interface.
The beneficial effect of network interface 1, network interface 2 and network interface 3 is described below in detail.
For network interface 1:
Since A point is 48V signal, so 48V signal can send PSE1 to, but due to the network interface 1 where PSE1 itself
It is exactly receiving end mouth, and there are diode D11, so that 48V supply voltage and PSE1 that POE interchanger provides reversely exported
48V voltage signal does not turn on D11, so allowing network interface 1 itself to be by power grid mouth because of the presence of diode D11.
For network interface 2:
If network interface 2 does not connect POE interchanger, then before network interface 1 carries out 4V detection and 20V graded signal is completed
A1 voltage is 0V in Fig. 7, so the Q28 in power supply module is connected, the 48V power supply signal that network interface 1 is sent is sent to PSE2, so that
Network interface 2 can connect power receiving equipment, i.e. network interface 2 is power supply network interface；
If network interface 2 is connected to POE interchanger before network interface 1 carries out 4V detection and 20V graded signal is completed, according to
PD detection module working principle described in embodiment 2, it is known that, when network interface 1 is in detection-phase, the PD detection module of network interface 2
Q22 shutdown, prevent network interface 2 from send a signal to rear class by electric module.So the POE exchange opportunity of network interface 2 recycles always
The detection signal of 4V is sent in A1.The working principle of the power supply module according to described in implementing 2 simultaneously, it is known that, in power supply module
Q28 shutdown, network interface 1 send 48V power supply signal can not supply PSE2.
Again because after network interface 1 receives the 48V power supply signal of POE interchanger transmission, not reconnecting rear class by electric module.
So the POE interchanger of network interface 2 can continue to connect rear class by electric module, according to the identical working principle of network interface 1, complete
4V detection and 20V graded signal to the last receive the 48V power supply signal that the POE interchanger of network interface 2 is sent.
In conclusion network interface 1 and network interface 2 can provide the power supply signal by electricity, while to other network interfaces simultaneously.
For network interface 3:
Identical with beneficial effect with the working principle of network interface 2, details are not described herein again.
It should be noted that capacitor charging and being controlled outside switch with field-effect transistors in the embodiment of the present invention, can also adopt
With the connection of relay control switch route, essential effect is consistent, belongs to the scope of protection of the invention.
In conclusion a kind of Power over Ethernet POE distributor provided in an embodiment of the present invention, comprising: multiple network interfaces, it is each
Network interface is separately connected different power supply modules, power receiving equipment detection module, power receiving equipment control module, wherein each power receiving equipment is examined
Survey module is connected to same by electric module；The power supply module of each network interface is all connect with the power supply module of other network interfaces, each
The power receiving equipment detection module of network interface is all connect with the power receiving equipment detection module of other network interfaces, the power receiving equipment control of each network interface
Molding block is connect with the power receiving equipment detection module of other network interfaces respectively.So that each network interface of the POE distributor can be made
For network interface of powering, can also be used as by power grid mouth so that POE distributor using more flexible, without user to network interface
It distinguishes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. a kind of Power over Ethernet POE distributor characterized by comprising
Multiple network interfaces, each network interface are separately connected different power supply modules, power receiving equipment detection module, power receiving equipment control mould
Block, wherein each power receiving equipment detection module be connected to it is same by electric module；
Wherein, the power supply module of each network interface is all connect with the power supply module of other network interfaces, the power receiving equipment detection of each network interface
Module is all connect with the power receiving equipment detection module of other network interfaces, the power receiving equipment control module of each network interface respectively with other nets
The power receiving equipment detection module connection of mouth；
The power receiving equipment detection module of any network interface, the detection letter for being sent when the power supply unit received through local terminal network interface
Number, and the control for being used to close this power receiving equipment detection module that the power receiving equipment control module for not receiving other network interfaces is sent
When signal, which is sent to described by electric module, also, sends and use to the power receiving equipment control module of other network interfaces
In the control signal for the power receiving equipment control module for closing other network interfaces；
The power receiving equipment control module of any network interface, the detection letter for being sent when the power supply unit received through local terminal network interface
Number, and the control for being used to close this power receiving equipment control module that the power receiving equipment detection module for not receiving other network interfaces is sent
When signal, the power receiving equipment detection module for closing other network interfaces is sent to the power receiving equipment detection module of other network interfaces
Control signal；
The power supply module of any network interface, for inciting somebody to action when receiving the power supply signal by the power supply unit transmission of local terminal network interface
The power supply signal is supplied to the power supply module of other network interfaces；And when local terminal network interface connection power receiving equipment, receive other
The power supply signal that the power supply module of network interface is sent, is supplied to being set by electricity for local terminal network interface by local terminal network interface for the power supply signal
It is standby.
2. POE distributor according to claim 1, which is characterized in that the power receiving equipment detection module, comprising: first
Switching device, first resistor, first capacitor, first diode and first input end, the second input terminal, third output end and
Four input terminals；
Wherein, the first end of first switch device is connect with the first input end of the power receiving equipment detection module, first switch device
The second end of part is connect with the second input terminal of first resistor and the power receiving equipment detection module, the third of first switch device
End is connect with the third output end of the power receiving equipment detection module；
One end of first resistor is connect with the second end of the first switch device, the other end ground connection of first resistor；
One end of first capacitor is connect with the second end of the first switch device, the other end ground connection of first capacitor；
The first end of first diode is connect with the 4th input terminal of the power receiving equipment detection module, the other end of first diode
It is connect with the second end of the first switch device；
The first input end and local terminal network interface connection of the power receiving equipment detection module, the second input of the power receiving equipment detection module
End is connect with the power receiving equipment control module of other network interfaces；The third output end of the power receiving equipment detection module respectively with other nets
The power receiving equipment control module of mouth, the power receiving equipment detection module of other network interfaces are connected, are connected by electric module；Power receiving equipment inspection
The 4th input terminal for surveying module is connect with the power supply module of local terminal network interface.
3. POE distributor according to claim 2, which is characterized in that the power receiving equipment control module, including with other
The corresponding power receiving equipment control submodule of each network interface；
Wherein, power receiving equipment control submodule, the detection signal for being sent when the power supply unit received through local terminal network interface,
And the control letter for closing this power receiving equipment control module that the power receiving equipment detection module for not receiving other network interfaces is sent
Number when, to the power receiving equipment detection module of corresponding other network interfaces send for close the network interface power receiving equipment detect mould
The control signal of block.
4. POE distributor according to claim 3, which is characterized in that the power receiving equipment control submodule, comprising: the
Two switching devices, the second diode, third diode, second resistance, the second capacitor and first input end, the second input/defeated
Outlet, third output end and the 4th input terminal；
Wherein, the first end of second switch device is connect with the first input end of the power receiving equipment control submodule, second switch
The second end of device is connect with the second input/output terminal of second resistance and the power receiving equipment control submodule, second switch
The third end of device is connect with the first end of the second diode；
The first end of second diode is connect with the third end of the second switch device, the other end of the second diode with should be by
The third output end of electric equipment control submodule connects；
The first end of third diode is connect with the 4th input terminal of the power receiving equipment control submodule, third diode it is another
End is connect with the second end of the second switch device；
One end of second resistance is connect with the second end of the second switch device, the other end ground connection of second resistance；
One end of second capacitor is connect with the second end of the second switch device, the other end ground connection of the second capacitor；
The first input end and local terminal network interface connection of the power receiving equipment control submodule, the second of the power receiving equipment control submodule
Input/output terminal connects with the power receiving equipment control module of the power receiving equipment detection module of other network interface, other network interfaces respectively
It connects；The third output end of the power receiving equipment control submodule respectively with the power receiving equipment detection module of other network interfaces, other network interfaces
Power receiving equipment control module connection；4th input terminal of the power receiving equipment control submodule and the power supply module of local terminal network interface connect
It connects.
5. POE distributor according to claim 4, which is characterized in that the power supply module, comprising: power control module,
Input signal control module and output signal control module；
Wherein, input signal control module, for receiving the power supply signal sent by the power supply unit of local terminal network interface, and by institute
State power supply signal be supplied to the 4th input terminal of power receiving equipment detection module of local terminal network interface, power receiving equipment control module the 4th
The power control module of input terminal and all network interfaces；
Power control module for receiving the power supply signal of input signal control module transmission, and the power supply signal is provided
Output signal control module is given, and when local terminal network interface connection power receiving equipment, receives the power supply module transmission of other network interfaces
Power supply signal；
Output signal control module, for receive power control module transmission power supply signal, and when local terminal network interface connection by
When electric equipment, which is supplied to the power receiving equipment of local terminal network interface connection by local terminal network interface.
6. POE distributor according to claim 5, which is characterized in that the input signal control module, comprising:
First zener diode, 3rd resistor, third capacitor, third switching device, the 4th diode and first input end,
Second output terminal and third output end；
The first end of first zener diode and one end of 3rd resistor connect, the other end ground connection of the first zener diode；
One end of 3rd resistor is connect with first input end, and the first end of the other end of 3rd resistor and the first zener diode connects
It connects；
One end of third capacitor is connect with first input end, and the first end of the other end of third capacitor and the first zener diode connects
It connects；
The first end of third switching device is connect with the first input end of the input signal control module, and the of third switching device
Two ends are connect with the first end of the first zener diode, the third end of third switching device and the first end of the 4th diode and
The second output terminal of the input signal control module connects；
The first end of 4th diode is connect with the third end of third switching device, and the other end of the 4th diode and the input are believed
The third output end connection of number control module；
The first input end and local terminal network interface connection of the input signal control module, the second output of the input signal control module
End is connect with the 4th input terminal of the power receiving equipment detection module of local terminal network interface, the third output end of the input signal control module
It is connect with the third output end of the input signal control module of all network interfaces and power control module.
7. POE distributor according to claim 6, which is characterized in that the power control module, comprising:
5th diode, the 4th capacitor, the 4th switching device, the 5th switching device, the 6th switching device, the 7th switching device,
Second zener diode, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance and the tenth electricity
Resistance and first input end, the second input/output terminal and third output end；
The first end of 5th diode is connect with the first input end of the power control module, the second end of the 5th diode and the
Four capacitance connections；
One end of 4th capacitor is connect with the second end of the 5th diode, the other end ground connection of the 4th capacitor；
One end of 4th resistance connects one end that the 4th capacitor and the 5th diode are connected, the other end of the 4th resistance and the 5th electricity
Resistance connection；
One end of 5th resistance is connect with one end of the 4th resistance, the other end ground connection of the 5th resistance；
One end of 6th resistance connects one end that the 4th capacitor and the 5th diode are connected, and the other end of the 6th resistance and second is surely
Press the first end connection of diode；
The first end of second zener diode is connect with one end of the 6th resistance, the other end ground connection of the second zener diode；
The first end of 4th switching device is connect with one end of the 6th resistance, and the second end of the 4th switching device is connected to the 4th electricity
The one end being connected with the 5th resistance is hindered, the third end of the 4th switching device is connect with the 7th resistance；
One end of 7th resistance is connect with the third end of the 4th switching device, the other end ground connection of the 7th resistance；
The first end of 5th switching device is grounded, and the second end of the 5th switching device is connect with the third end of the 4th switching device,
The third end of 5th switching device is connect with the 8th resistance；
One end of 8th resistance is connect with the third end of the 5th switching device, and the other end of the 8th resistance is connect with the tenth resistance；
The first end of 6th switching device is grounded, and the second end of the 6th switching device is connect with the third end of the 5th switching device,
The third end of 6th switching device is connect with the 9th resistance；
One end of 9th resistance is connect with the third end of the 6th switching device, and the other end of the 9th resistance is connect with the tenth resistance；
One end of tenth resistance is connect with the 9th resistance, and the other end of the tenth resistance is connect with the first end of the 7th switching device；
The first end of 7th switching device is connect with the second input/output terminal of the tenth resistance and the power control module, the
The second end of seven switching devices is connect with the 9th resistance, and the third end of the 7th switching device and the third of the power control module are defeated
Outlet connection；
The first input end of the power control module and local terminal network interface connection, the second input/output terminal of power control module with
Second input/output terminal of the power control module of all network interfaces is connected with the third output end of input signal control module.
8. POE distributor according to claim 7, which is characterized in that the output signal control module, comprising: the 6th
Diode, power supply unit PSE and input terminal and output end；
One end of power supply unit PSE is connect with the input terminal of the output signal control module, the other end of power supply unit PSE and
The first end of six diodes connects；
The first end of 6th diode is connect with power supply unit PSE, and the second end and the output signal of the 6th diode control mould
The output end of block connects；
The output signal control module input terminal is connect with the third output end of the power control module of local terminal network interface, output letter
Number control module output end and local terminal network interface connection.
9. POE distributor according to claim 8, which is characterized in that the switching device is field effect transistor, or after
Electric appliance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510038178.XA CN105897432B (en) | 2015-01-26 | 2015-01-26 | A kind of Power over Ethernet POE distributor |
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| CN201510038178.XA CN105897432B (en) | 2015-01-26 | 2015-01-26 | A kind of Power over Ethernet POE distributor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107979474B (en) * | 2016-10-21 | 2020-06-26 | 华为技术有限公司 | Network device and power supply method |
| CN107846286A (en) * | 2017-10-19 | 2018-03-27 | 浙江大华技术股份有限公司 | It is a kind of for the electric supply installation of cascade, method of supplying power to and cascade electric power system |
| US10887116B2 (en) | 2017-12-11 | 2021-01-05 | Cisco Technology, Inc. | Ethernet power distribution |
| CN109038692B (en) * | 2018-06-27 | 2021-11-16 | 浙江大华技术股份有限公司 | Power supply device |
| CN112684383B (en) * | 2020-11-18 | 2024-07-19 | 杭州士兰微电子股份有限公司 | Load connection detection method and power supply device in Ethernet power supply system |
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