CN112367075A - Single-interface multifunctional signal processing circuit - Google Patents
Single-interface multifunctional signal processing circuit Download PDFInfo
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- CN112367075A CN112367075A CN202011182488.6A CN202011182488A CN112367075A CN 112367075 A CN112367075 A CN 112367075A CN 202011182488 A CN202011182488 A CN 202011182488A CN 112367075 A CN112367075 A CN 112367075A
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- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
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Abstract
The invention discloses a single-interface multifunctional signal processing circuit, which comprises: a power port, a signal port, and a ground port; the power supply is connected with the power supply port; the circuit comprises a signal processing circuit, a first resistor, a first switch, a second switch and a third switch, wherein the signal processing circuit comprises a first input end and a second input end; the second switch, the first resistor and the third switch are sequentially connected in series between the first input end of the processing circuit and the ground port; and the controller is connected with the output end and the second input end of the signal processing circuit and controls the first switch, the second switch and the third switch to be switched on or off. The single-interface multifunctional signal processing circuit provided by the invention can meet the requirements of a control system on different types of signals, reduce the size of a signal processing circuit module and reduce interfaces, and achieve the effects of miniaturization and simplification of equipment.
Description
Technical Field
The embodiment of the invention relates to an automatic control principle, in particular to a single-interface multifunctional signal processing circuit.
Background
In modern industrial production, physical quantities such as process parameters, working condition logics, equipment running conditions and the like in the industrial production process must be converted into electric signals which can be identified by a computer through a sensor or a transmitter, signals output by the sensor and the transmitter have various specifications, and 4-20mA current signals, platinum thermal resistance signals, switching signals and the like are all signal specifications which are frequently used by a computer measurement and control system. An automatic controller used for a control system, particularly a ship controller, is often required to acquire or output various signals when in use.
In order to meet the input and output requirements of various signals such as 4-20mA current signals, platinum thermal resistance signals, switch signals and the like in a control system and meet the differentiation requirements of different systems, the common control system design at present is combined through modules with various single functions so as to meet the requirements of different types of input and output signals. Although the circuit design can meet the requirements of a system for considering various signals such as 4-20mA current signals, platinum thermal resistance signals, switching signals and the like, the surplus of interfaces is common, and the size of the circuit module combination is increased due to the combination mode, so that the circuit module combination is not suitable for being used in places with limited space such as vehicles and ships.
Disclosure of Invention
The invention provides a single-interface multifunctional signal processing circuit, which is used for meeting the requirements of a control system on input and output of different types of signals such as 4-20mA current signals, platinum thermal resistance signals, switch signals and the like, and reducing the size of a processing circuit module and interfaces.
The embodiment of the invention provides a single-interface multifunctional signal processing circuit, which is characterized by comprising: a power port, a signal port, and a ground port; the first power supply is connected with the power supply port; the output end of the digital-to-analog conversion circuit is connected with a signal port through the second power supply and the first switch; the circuit comprises a signal processing circuit, a first resistor, a second switch and a third switch, wherein the signal processing circuit comprises a first input end and a second input end; the second switch, the first resistor and the third switch are sequentially connected in series between the first input end and the grounding port of the signal processing circuit, and the second input end of the signal processing circuit is grounded; and the controller is connected with the output end of the signal processing circuit and the input end of the digital-to-analog conversion circuit and controls the first switch, the second switch and the third switch to be switched on or off.
Optionally, the single-interface multifunctional signal processing circuit comprises a fourth switch; the fourth switch is connected between the power supply port and the first power supply; the fourth switch is controlled by the controller to be turned on and off.
Optionally, the signal processing circuit comprises an amplifier, an analog-to-digital conversion circuit; the first input end and the second input end of the amplifier are respectively used as the first input end and the second input end of the signal processing circuit; the input end of the analog-to-digital conversion circuit is connected with the output end of the amplifier; the output end of the analog-to-digital conversion circuit is used as the output end of the signal processing circuit. Optionally, the power port is connected to a first end of the sensor, and the signal port is connected to a second end of the sensor; the controller controls the second switch, the third switch and the fourth switch to be switched on, and the first switch is switched off.
Optionally, the power port is connected to the first end of the sensor, the signal port is connected to the second end of the sensor, and the ground port is connected to the third end of the sensor; the controller controls the second switch, the third switch and the fourth switch to be switched on, and the first switch is switched off.
Optionally, the signal port and the ground port are respectively connected to two ends of an external load; the controller controls the first switch to be turned on, and the second switch and the third switch to be turned off.
Optionally, the signal port and the ground port are respectively connected to the second end and the third end of the external sensor; the controller controls the first switch and the second switch to be turned off.
Optionally, the power port and the signal port are respectively connected to a first end and a second end of the external sensor; the controller controls the fourth switch to be switched on, and the first switch and the second switch are switched off.
Optionally, the power supply port signal port and the ground port are respectively connected with a first end, a second end and a third end of the external sensor and connected with a second port of the external switch; the controller controls the fourth switch to be switched on, and the first switch and the second switch are switched off.
Optionally, the power port and the ground port are respectively connected to a first end and a third end of an external load; the controller controls the first switch and the third switch to be turned off, and the controller outputs a switching value signal by controlling the fourth switch to be turned off and turned on.
The invention realizes that the signal processing circuit receives or sends different types of signals such as 4-20mA current signals, platinum thermal resistance signals, switch signals and the like by arranging a plurality of switches controlled by the controller and controlling different combinations of the on-off states of the switches, and adopts the set of simple signal processing circuit with switchable functions to replace the traditional circuit combination module with multiple single functions, thereby solving the problems of multiple interfaces and large module volume of the multifunctional signal processing circuit in the automatic control equipment and realizing the effects of miniaturization and simplification of the equipment.
Drawings
Fig. 1 is a schematic structural diagram of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating another connection of a single-interface multi-function signal processing circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating another connection of a single-interface multi-function signal processing circuit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of another connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating another connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention. Referring to fig. 1, the single-interface multifunctional signal processing circuit includes: a power port 101, a signal port 102, and a ground port 103; a first power supply 104, wherein the first power supply 104 is connected with the power port 101; the digital-to-analog conversion circuit 105, the first switch 106 and the second power supply 107, wherein the output end of the digital-to-analog conversion circuit 105 is connected with the signal port 102 through the second power supply 107 and the first switch 106; a signal processing circuit 108, a first resistor 109, a second switch 110 and a third switch 111, wherein the signal processing circuit 108 comprises a first input terminal 112 and a second input terminal 113; the second switch 110, the first resistor 109 and the third switch 111 are sequentially connected in series between the first input end 112 of the signal processing circuit 108 and the ground port 103, and the second input end 113 of the signal processing circuit 108 is grounded; and a controller 114, connected to the output terminal of the signal processing circuit 108 and the input terminal of the digital-to-analog conversion circuit 105, for controlling the first switch 106, the second switch 110, and the third switch 111 to be turned on or off.
Optionally, the single-interface multifunctional signal processing circuit further comprises a fourth switch 115; the fourth switch 115 is connected between the power port 101 and the first power supply; the fourth switch 115 is controlled to be turned on and off by the controller 114.
The power port 101 is connected to a first power supply 104, and is a port for supplying power to an external circuit. The power port 101 may be directly connected to the first power supply 104, or may be indirectly connected to the first power supply 104 through the fourth switch 115. For example, the power supply voltage of the first power supply 104 is 24V, and the positive electrode of the first power supply 104 is connected to the power port 101 through the fourth switch 115 to supply power to the external circuit; the signal port 102 is a port for inputting and outputting signals to and from the signal processing circuit 108, and is connected to a first input terminal 112 of the signal processing circuit, the first switch 106, and the second switch 110, respectively; the ground port 103 is a port connected to a ground terminal; the signal processing circuit 108 includes: an amplifier 116 and an analog-to-digital conversion circuit 117; the first input terminal 112 of the signal processing circuit 108 is connected to the signal port 102, and the second input terminal 113 of the signal processing circuit 108 is grounded; the input end of the analog-to-digital conversion circuit 117 is connected to the output end of the amplifier 116, and the output end of the analog-to-digital conversion circuit 117 is the output end of the signal processing circuit 108, and is connected to the controller 114, for example, the controller 114 via a Gpio port; the input end of the digital-to-analog conversion circuit 105 is connected to the controller 114, for example, the controller 114 is connected via a Gpio port, and the output end of the digital-to-analog converter is connected to the second power supply 107; the second power supply 107 is connected with the signal port 102 through the first switch 106; the controller 114 is connected to the first output terminal 112 of the signal processing circuit 108 and the input terminal of the digital-to-analog conversion circuit 105 for collecting and sending signal signals, and the controller 114 may also be connected to each switch through the Gpio port to control the on and off of the switch.
According to the embodiment of the invention, the controller is used for controlling the on and off of the switch, so that the connection method of the single-interface multifunctional signal processing circuit is changed, and the processing, acquisition and sending of various signals such as 4-20mA current signals, platinum thermal resistance signals, switch signals and the like are realized by matching with different external circuits, the problems of large size and multiple interfaces of the multifunctional signal processing circuit module are solved, and the effects of miniaturization and simplification of the circuit module are realized.
Optionally, the signal processing circuit 108 includes an amplifier 116, an analog-to-digital conversion circuit 117; a first input terminal and a second input terminal of the amplifier are respectively used as a first input terminal 112 and a second input terminal 113 of the signal processing circuit 108; the input end of the analog-to-digital conversion circuit 117 is connected with the output end of the amplifier 116; an output terminal of the analog-to-digital conversion circuit 117 serves as an output terminal of the signal processing circuit 108.
The amplifier 116 is a device for amplifying an input signal, and includes a first input terminal, a second input terminal, and an output terminal, where the first input terminal of the amplifier is used as the first input terminal 112 of the signal processing circuit 108, and the output terminal of the amplifier 116 is connected to the input terminal of the analog-to-digital conversion circuit 117; an output terminal of the analog-to-digital conversion circuit 117 is connected to the controller 114 as an output terminal of the signal processing circuit 108.
In the above embodiment, optionally, the controller 114 changes different on-off combinations of the four switches, and may switch different functions of the single-interface multifunctional signal processing circuit in cooperation with different external circuits, and the following description is about the connection manner of several single-interface multifunctional signal processing circuits with different functions, but the present invention is not limited thereto.
Fig. 2 is a schematic diagram of a connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention. Referring to fig. 2, in a schematic diagram of a connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention, optionally, a power port 101 is connected to a first end 202 of a sensor, and a signal port 102 is connected to a second end 203 of the sensor; the controller 114 controls the second switch 110, the third switch 111 and the fourth switch 115 to be turned on, and the first switch 106 to be turned off.
Wherein, the first power supply 104 connected to the power port 101 provides 24V power for the sensor 201; the controller 114 may be connected to the output end of the signal processing circuit 108 through a Gpio interface, and collects a signal output by the signal processing circuit 108; the sensor 201 can be a pressure sensor 201, a temperature sensor 201, a speed sensor 201, an angle sensor 201, or the like, outputs a 4-20mA current analog quantity signal, the signal enters the amplifier 116 through the signal port 102 for signal amplification, and then enters the analog-to-digital conversion circuit 117, and the analog-to-digital conversion circuit 117 converts the analog signal into a digital signal and transmits the signal to the controller 114 through a Goip interface for collection. The embodiment of the invention controls the states of the switches through the controller, changes the wiring mode of the single-interface multifunctional signal processing circuit, and is matched with proper external circuit wiring, so that the single-interface multifunctional signal processing circuit has the function of receiving 4-20mA current analog quantity input, and the effects of miniaturization and simplification of a circuit module are achieved.
Fig. 3 is a schematic diagram of a connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention. Referring to fig. 3, in a schematic diagram of a connection mode of the single-interface multifunctional signal processing circuit according to the embodiment of the present invention, optionally, the power port 101 is connected to the first end 202 of the sensor, the signal port 102 is connected to the second end 203 of the sensor, and the ground port 103 is connected to the third end 301 of the sensor; the controller 114 controls the second switch 110, the third switch 111 and the fourth switch 115 to be turned on, and the first switch 106 to be turned off.
Wherein, the first power supply 104 connected to the power port 101 provides 24V power for the sensor 201; the controller 114 is connected with the output end of the signal processing circuit 108 through a Gpio interface and collects signals output by the signal processing circuit 108; the sensor 201 can output a 4-20mA current analog quantity signal, the signal enters the amplifier 116 through the signal port 102 for signal amplification, and then enters the analog-to-digital conversion circuit 117, the analog signal is converted into a digital signal, and the signal is transmitted to the controller 114 through the Goip interface for collection. The embodiment of the invention controls the states of the switches through the controller, changes the wiring mode of the single-interface multifunctional signal processing circuit, and is matched with proper external circuit wiring, so that the single-interface multifunctional signal processing circuit has the function of receiving 4-20mA current analog quantity input, and the effects of miniaturization and simplification of a circuit module are achieved.
Fig. 4 is a schematic diagram of a connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention. Referring to fig. 4, in a schematic diagram of a connection mode of the single-interface multifunctional signal processing circuit according to the embodiment of the present invention, optionally, the signal port 102 and the ground port 103 are respectively connected to two ends of an external load 401; the controller 114 controls the first switch 106 to be turned on and the second switch 110 and the third switch 111 to be turned off.
The controller 114 is connected to the input end of the digital-to-analog conversion circuit 105 through a Gpio interface, and can provide a digital signal to the digital-to-analog conversion circuit 105; the digital-to-analog conversion circuit 105 converts the digital signal into a current analog quantity of 4 to 20mA, and the current analog quantity is output from the output terminal of the digital-to-analog conversion circuit 105, output via the second power supply 107, the first switch 106, and the signal port 102, and supplied to the external load 401. The embodiment of the invention controls the states of the switches through the controller, changes the wiring mode of the single-interface multifunctional signal processing circuit, and is matched with proper external circuit wiring, so that the single-interface multifunctional signal processing circuit has the function of outputting the 4-20mA current analog quantity, and the effects of miniaturization and simplification of a circuit module are achieved.
Fig. 5 is a schematic diagram of a connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention. Referring to fig. 5, in a schematic diagram of a connection mode of the single-interface multifunctional signal processing circuit according to the embodiment of the present invention, optionally, the signal port 102 and the ground port 103 are respectively connected to the second terminal 203 and the third terminal 301 of the external sensor; the controller 114 controls the first switch 106 and the second switch 110 to be turned off.
The controller 114 is connected to the output end of the signal processing circuit 108 through a Gpio interface, and collects signals output by the signal processing circuit 108; the sensor 201 can be a PT1000 or PT100 thermistor with a power supply, the output current analog signal is directly connected to the output end of the amplifier 116, the analog signal is amplified by the amplifier 116, then transmitted to the analog-to-digital conversion circuit 117 for conversion and output of a corresponding digital signal, and transmitted to the controller 114 for collection through the Gpio interface. The embodiment of the invention controls the states of the switches through the controller, changes the wiring mode of the single-interface multifunctional signal processing circuit, and is matched with the external circuit wiring with the platinum thermal resistance sensor, so that the single-interface multifunctional signal processing circuit has the function of receiving platinum thermal resistance signals, and the effects of miniaturization and simplification of a circuit module are achieved.
Fig. 6 is a schematic diagram of a connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention. Referring to fig. 6, in a schematic diagram of a connection mode of the single-interface multifunctional signal processing circuit according to the embodiment of the present invention, optionally, the power port 101 and the signal port 102 are respectively connected to the first end 202 and the second end 203 of the external sensor; the controller 114 controls the fourth switch 115 to be turned on, and the first switch 106 and the second switch 110 to be turned off.
The power supply port 101 is connected with the first end 202 of the sensor, and the power supply port 101 is connected with the first power supply 104 to provide 24V power for the sensor 201; the controller 114 is connected with the output end of the signal processing circuit 108 through a Gpio interface and collects the switching value signal output by the signal processing circuit 108; the signal terminal is connected to the second terminal 203 of the sensor, the sensor 201 may be a relay, an electric switch, or other device capable of providing a switching value signal, outputs a 24V switching value signal, enters the first input terminal 112 of the amplifier via the signal port 102, and transmits the switching value signal to the controller 114 via the Gpio interface via the analog-to-digital conversion circuit 117 for collection. The embodiment of the invention controls the states of the switches through the controller, changes the wiring mode of the single-interface multifunctional signal processing circuit, and is matched with the external circuit wiring without an external power supply, so that the single-interface multifunctional signal processing circuit has the function of receiving 24V switching value signal input, and the effects of miniaturization and simplification of a circuit module are achieved.
Fig. 7 is a schematic diagram of a connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention. Referring to fig. 7, in a schematic diagram of a connection mode of the single-interface multifunctional signal processing circuit according to the embodiment of the present invention, optionally, the signal port 102 and the ground port 103 of the power port 101 are respectively connected to the first end 202, the second end 203 and the third end 301 of the external sensor, and are connected to the second port of the external switch; the controller 114 controls the fourth switch 115 to be turned on, and the first switch 106 and the second switch 110 to be turned off.
The power supply port 101 is connected with the first end 202 of the sensor, and the power supply port 101 is connected with the first power supply 104 to provide 24V power for the sensor 201; the controller 114 is connected with the output end of the signal processing circuit 108 through a Gpio interface and collects the switching value signal output by the signal processing circuit 108; the signal end is connected with the second end 203 of the sensor, the sensor 201 can be a relay, an electric switch and other devices which can provide a switching value signal, the sensor 201 outputs a 24V switching value signal, the 24V switching value signal enters the first input end 112 of the amplifier through the signal port 102, and the switching value signal is transmitted to the controller 114 for collection through the Gpio interface through the analog-to-digital conversion circuit 117. The embodiment of the invention controls the states of the switches through the controller, changes the wiring mode of the single-interface multifunctional signal processing circuit, and is matched with the external circuit wiring without an external power supply, so that the single-interface multifunctional signal processing circuit has the function of receiving 24V switching value signal input, and the effects of miniaturization and simplification of a circuit module are achieved.
Fig. 8 is a schematic diagram of a connection mode of a single-interface multifunctional signal processing circuit according to an embodiment of the present invention. Referring to fig. 8, in a schematic diagram of a connection mode of the single-interface multifunctional signal processing circuit according to the embodiment of the present invention, optionally, the power port 101 and the ground port 103 are respectively connected to two ends of an external load 401; the controller 114 controls the first switch 106 and the third switch 111 to be turned off, and the controller 114 outputs the switching value signal by controlling the fourth switch 115 to be turned off and on.
The power port 101 is connected with a first power supply 104 to supply power to the circuit; the controller 114 may control on or off of the fourth switch 115 to output a 24V switching amount signal to the external load 401, and may control a frequency and a duty ratio of the output switching amount to perform a pulse width modulation output. The embodiment of the invention controls the states of the switches through the controller, changes the wiring mode of the single-interface multifunctional signal processing circuit, and is matched with external circuit wiring with external load, so that the single-interface multifunctional signal processing circuit has the function of outputting 24V switching value signals, and the effects of miniaturization and simplification of a circuit module are achieved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A single-interface, multi-function signal processing circuit, comprising:
a power port, a signal port, and a ground port;
the first power supply is connected with the power port;
the output end of the digital-to-analog conversion circuit is connected with the signal port through the second power supply and the first switch;
the circuit comprises a signal processing circuit, a first resistor, a second switch and a third switch, wherein the signal processing circuit comprises a first input end and a second input end; the second switch, the first resistor and the third switch are sequentially connected in series between the first input end of the signal processing circuit and the grounding port, and the second input end of the signal processing circuit is grounded;
and the controller is connected with the output end of the signal processing circuit and the input end of the digital-to-analog conversion circuit and controls the first switch, the second switch and the third switch to be switched on or off.
2. The single-interface multi-function signal processing circuit of claim 1, further comprising a fourth switch; the fourth switch is connected between the power port and the first power supply; the fourth switch is controlled by the controller to be turned on and off.
3. The single interface multi-function signal processing circuit of claim 2, wherein said signal processing circuit comprises an amplifier, an analog to digital conversion circuit;
the first input end and the second input end of the amplifier are respectively used as the first input end and the second input end of the signal processing circuit; the input end of the analog-to-digital conversion circuit is connected with the output end of the amplifier; and the output end of the analog-to-digital conversion circuit is used as the output end of the signal processing circuit.
4. The single-interface multi-function signal processing circuit of claim 3, wherein the power port is connected to a first end of a sensor and the signal port is connected to a second end of the sensor;
the controller controls the second switch, the third switch and the fourth switch to be switched on, and the first switch is switched off.
5. The single-interface multifunctional signal processing circuit of claim 3, wherein the power port is connected to a first end of the sensor, the signal port is connected to a second end of the sensor, and the ground port is connected to a third end of the sensor;
the controller controls the second switch, the third switch and the fourth switch to be switched on, and the first switch is switched off.
6. The single-interface multifunctional signal processing circuit of claim 3, wherein the signal port and the ground port are respectively connected to two ends of an external load;
the controller controls the first switch to be turned on, and the second switch and the third switch are turned off.
7. The single-interface multi-function signal processing circuit of claim 3, wherein the signal port and the ground port are connected to a second terminal and a third terminal of an external sensor, respectively;
the controller controls the first switch and the second switch to be turned off.
8. The single-interface multi-function signal processing circuit of claim 3, wherein the power port and the signal port are connected to a first end and a second end of an external sensor, respectively;
the controller controls the fourth switch to be switched on, and the first switch and the second switch are switched off.
9. The single-interface multifunctional signal processing circuit of claim 3, wherein the power port and the ground port are respectively connected with a first end, a second end and a third end of an external sensor to be connected with a second port of an external switch;
the controller controls the fourth switch to be switched on, and the first switch and the second switch are switched off.
10. The single-interface multifunctional signal processing circuit of claim 3, wherein the power port and the ground port are respectively connected to two ends of an external load;
the controller controls the first switch and the third switch to be switched off, and the controller outputs a switching value signal by controlling the fourth switch to be switched off and switched on.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117254810A (en) * | 2023-11-17 | 2023-12-19 | 浙江国利信安科技有限公司 | Signal acquisition system |
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| CN117254810A (en) * | 2023-11-17 | 2023-12-19 | 浙江国利信安科技有限公司 | Signal acquisition system |
| CN117254810B (en) * | 2023-11-17 | 2024-03-05 | 浙江国利信安科技有限公司 | Signal acquisition system |
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