CN103454557B - The detection method of a kind of cable fault and detecting device - Google Patents
The detection method of a kind of cable fault and detecting device Download PDFInfo
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Abstract
The detection method of a kind of cable fault of disclosure and detecting device, it is possible to when being not take up the communication resource, it is determined that the input of cable or outfan whether fault。The method includes: detect the voltage between the first outfan or the second outfan and the described earth terminal of described current inductor part, it is thus achieved that described first outfan or the magnitude of voltage between described second outfan and described earth terminal；According to the voltage range belonging to described magnitude of voltage, it is determined that the input of described cable or outfan whether fault。The present invention is applicable to the communications field。
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for detecting a cable fault.
Background
When power is supplied among a plurality of modules or racks, cables are required to be connected to ensure the normal power supply, and when the cables among the modules or racks fail, the modules or the racks need to detect the section where the failure occurs in time and output an alarm signal.
In the prior art, a cable fault is detected by defining a signal line in a bundle of cables, and when an alarm signal is output, one end of the signal line is a signal sending end, and the other end of the signal line is a signal receiving end. However, whether the cable fails or not, the voltage of the transmitting end is always high, and the transmitting end cannot know whether the cable fails or not. The cable fault is detected by defining two signal lines in a bundle of cables, and when an alarm signal is output, each end of the cable is provided with a sending end and a receiving end. However, this method requires that the processing circuits of the racks or modules connecting the two ends of the cable are different, and is not suitable for two modules or racks with the same processing circuit; in addition, the method occupies two wires in the cable to implement work irrelevant to communication, and occupies communication resources.
Disclosure of Invention
Embodiments of the present invention provide a method and an apparatus for detecting a cable fault, which can determine whether an input end or an output end of a cable has a fault without occupying communication resources.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method and an apparatus for detecting a cable fault, where a current sensing circuit is configured at an input end or an output end of a cable, and the current sensing circuit at least includes: a current sensing device connected to an input or an output of the cable, a first power source connected to a first output of the current sensing device, and a ground connected to a second output of the current sensing device, the method comprising:
detecting the voltage between a first output end or a second output end of the current sensing device and the grounding end to obtain the voltage value between the first output end or the second output end and the grounding end;
and determining whether the input end or the output end of the cable has a fault according to the voltage range to which the voltage value belongs.
In a first possible implementation manner of the first aspect, according to the first aspect, the current sensing circuit is configured at an input end of the cable; the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the second resistor, the input end of the second resistor is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable;
detecting a voltage between a first output terminal or a second output terminal of the current sensing device and the ground terminal, and obtaining a voltage value between the first output terminal or the second output terminal and the ground terminal specifically includes:
detecting the voltage between a first output end of the current sensing device and the grounding end to obtain a voltage value between the first output end and the grounding end;
the determining whether the input end of the cable has the fault according to the voltage range to which the voltage value belongs specifically includes:
if the voltage value is a high level, determining that the input end of the cable has a fault;
if the voltage value is a low level, determining that the input end of the cable is normal;
or,
the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal, and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the input end of the second resistor, the output end of the second resistor is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable;
detecting a voltage between a first output terminal or a second output terminal of the current sensing device and the ground terminal, and obtaining a voltage value between the first output terminal or the second output terminal and the ground terminal specifically includes:
detecting the voltage between a second output end of the current sensing device and the grounding end to obtain a voltage value between the second output end and the grounding end;
the determining whether the input end of the cable has the fault according to the voltage range to which the voltage value belongs specifically includes:
if the voltage value is a low level, determining that the input end of the cable has a fault;
and if the voltage value is a high level, determining that the input end of the cable is normal.
In a second possible implementation manner of the first aspect, according to the first possible implementation manner of the first aspect, the first power supply and the second power supply are dangerous voltages;
or,
the first power supply is a dangerous voltage and the second power supply is a safe voltage.
In a third possible implementation manner of the first aspect, with reference to the first aspect, the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, the current sensing circuit is configured at an output end of the cable; the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal and the current sensing device; the output end of the first power supply is connected with the input end of the third resistor, the first output end of the current sensing device is connected with the output end of the third resistor, the second output end of the current sensing device is connected with the grounding end, the third output end is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
detecting a voltage between a first output terminal or a second output terminal of the current sensing device and the ground terminal, and obtaining a voltage value between the first output terminal or the second output terminal and the ground terminal specifically includes:
detecting the voltage between a first output end of the current sensing device and the grounding end to obtain a voltage value between the first output end and the grounding end;
the determining whether the output end of the cable has the fault according to the voltage range to which the voltage value belongs specifically includes:
if the voltage value is a high level, determining that the output end of the cable has a fault;
if the voltage value is a low level, determining that the output end of the cable is normal;
or,
the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal, and the current sensing device; the output end of the first power supply is connected with the first output end of the current sensing device, the second output end of the current sensing device is connected with the input end of the third resistor, the output end of the third resistor is connected with the grounding end, the third output end of the current sensing device is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
detecting a voltage between a first output terminal or a second output terminal of the current sensing device and the ground terminal, and obtaining a voltage value between the first output terminal or the second output terminal and the ground terminal specifically includes:
detecting the voltage between a second output end of the current sensing device and the grounding end to obtain a voltage value between the second output end and the grounding end;
the determining whether the output end of the cable has the fault according to the voltage range to which the voltage value belongs specifically includes:
if the voltage value is a low level, determining that the output end of the cable has a fault;
and if the voltage value is a high level, determining that the output end of the cable is normal.
In a fourth possible implementation manner of the first aspect, with reference to the first aspect or the first possible implementation manner of the first aspect to the third possible implementation manner of the first aspect, the current sensing device includes: any one of an optical coupler, a relay and a Hall device.
In a second aspect, the present invention provides a cable fault detection device, in which a current sensing circuit is disposed at an input end or an output end of a cable, the current sensing circuit at least includes: with the current sensing device of the input or output connection of cable, with the first power that the first output of current sensing device is connected, and with the earthing terminal that the second output of current sensing device is connected, cable fault detection device includes: a detection unit and a determination unit;
the detection unit is used for detecting the voltage between the first output end or the second output end of the current sensing device and the grounding end to obtain the voltage value between the first output end or the second output end and the grounding end;
the determining unit is used for determining whether the input end or the output end of the cable has a fault according to the voltage range to which the voltage value obtained by the detecting unit belongs.
In a first possible implementation manner of the second aspect, according to the second aspect, the current sensing circuit is configured at an input end of the cable; the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the second resistor, the input end of the second resistor is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable;
the detection unit is specifically configured to detect a voltage between a first output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal and the ground terminal;
the determining unit is specifically configured to:
if the voltage value is a high level, determining that the input end of the cable has a fault;
if the voltage value is a low level, determining that the input end of the cable is normal;
or,
the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal, and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the input end of the second resistor, the output end of the second resistor is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable;
the detection unit is specifically configured to detect a voltage between a second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal;
the determining unit is specifically configured to:
if the voltage value is a low level, determining that the input end of the cable has a fault;
and if the voltage value is a high level, determining that the input end of the cable is normal.
In a second possible implementation manner of the second aspect, according to the first possible implementation manner of the second aspect, the first power supply and the second power supply are dangerous voltages;
or,
the first power supply is a dangerous voltage and the second power supply is a safe voltage.
In a third possible implementation manner of the second aspect, with reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, the current sensing circuit is configured at an output end of the cable; the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal and the current sensing device; the output end of the first power supply is connected with the input end of the third resistor, the first output end of the current sensing device is connected with the output end of the third resistor, the second output end of the current sensing device is connected with the grounding end, the third output end is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
the detection unit is specifically configured to detect a voltage between a first output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal and the ground terminal;
the determining unit is specifically configured to:
if the voltage value is a high level, determining that the output end of the cable has a fault;
if the voltage value is a low level, determining that the output end of the cable is normal;
or,
the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal, and the current sensing device; the output end of the first power supply is connected with the first output end of the current sensing device, the second output end of the current sensing device is connected with the input end of the third resistor, the output end of the third resistor is connected with the grounding end, the third output end of the current sensing device is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
the detection unit is specifically configured to detect a voltage between a second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal;
the determining unit is specifically configured to:
if the voltage value is a low level, determining that the output end of the cable has a fault;
and if the voltage value is a high level, determining that the output end of the cable is normal.
In a fourth possible implementation manner of the second aspect, with reference to the second aspect or the first possible implementation manner of the second aspect to the third possible implementation manner of the second aspect, the current sensing device includes: any one of an optical coupler, a relay and a Hall device.
The embodiment of the invention provides a method and a device for detecting cable faults, wherein the method comprises the steps of detecting the voltage between a first output end or a second output end of a current sensing device and a grounding end to obtain the voltage value between the first output end or the second output end and the grounding end; and determining whether the input end or the output end of the cable has a fault according to the voltage range to which the voltage value belongs. According to the scheme, under the condition that one signal line is used, the current sensing circuit for detecting the cable fault is added to the input end of the cable, so that the cable fault detection device can detect whether the input end or the output end of the cable is in fault or not through the voltage at the specific position of the current sensing circuit, and further can determine whether the input end or the output end of the cable is in fault or not under the condition that communication resources are not occupied.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for detecting a cable fault according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another cable fault detection method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a current sensing circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another current sensing circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a current sensing circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another current sensing circuit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a cable fault detection apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another cable fault detection apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Example 1
The embodiment of the invention provides a method for detecting cable faults, wherein a current sensing circuit is configured at the input end or the output end of a cable, and the current sensing circuit at least comprises the following components: a current sensing device connected to an input or an output of the cable, a first power source connected to a first output of the current sensing device, and a ground terminal connected to a second output of the current sensing device, as shown in fig. 1, the method comprising:
101. and detecting the voltage between the first output end or the second output end of the current sensing device and the grounding end to obtain the voltage value between the first output end or the second output end and the grounding end.
It should be noted that a bundle of cables has a plurality of signal lines for transmitting information from the input end of the cable to the output end of the cable. In order to ensure the information transfer from the input end of the cable to the output end of the cable, the input end and the output end of the cable need to be able to detect whether the cable is faulty or not. In order to enable the input end of the cable and the output end of the cable to detect whether the cable is faulty or not, a signal line for detecting whether the cable is faulty or not can be defined in the bundle of cables.
When the output end of the cable detects whether the cable is in fault, the level corresponding to the voltage of the defined signal line can be directly judged; if the level corresponding to the voltage is a low level, the cable is in fault; and if the level corresponding to the voltage is high level, the cable is normal. Here, the low level generally refers to a voltage close to 0, and the high level generally refers to a voltage close to a system operation voltage.
Of course, the current sensing circuit may be disposed at the output end of the cable.
In order to guarantee the rate and user experience of transferring information between the input of the cable and the output of the cable, it is necessary to be on this defined signal line so that the input is also able to detect whether the cable is faulty or not. Specifically, a current sensing circuit may be configured at the input end of the cable, so that the cable fault detection apparatus may detect a voltage between the first output end or the second output end of the current sensing device and the ground end to obtain a voltage value between the first output end or the second output end and the ground end, and further determine whether the input end of the cable is faulty according to the voltage value.
102. And determining whether the input end or the output end of the cable has a fault according to the voltage range to which the voltage value belongs.
And when the input end of the cable is determined to be in fault according to the voltage value, different current sensing circuits judge whether the input end or the output end of the cable is in fault according to different detection methods.
Illustratively, when the current sensing circuit is configured at the input end of the cable, the first power supply, the second power supply, the first resistor, the second resistor, the ground end and the current sensing device are configured; wherein the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the second resistor, the input end of the second resistor is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the grounding end, the third output end of the current sensing device is connected with the input end of the cable, and the cable fault detection device detects the voltage between the first output terminal of the current sensing device and the ground terminal, and when the voltage value between the first output terminal and the ground terminal is obtained, the cable fault detection device determines whether the input end of the cable has a fault according to the voltage range to which the voltage value belongs, and specifically comprises: if the voltage value is a high level, determining that the input end of the cable has a fault; and if the voltage value is low level, determining that the input end of the cable is normal.
The embodiment of the invention provides a method for detecting a cable fault, which comprises the steps of detecting the voltage between a first output end or a second output end of a current sensing device and a grounding end to obtain the voltage value between the first output end or the second output end and the grounding end; and determining whether the input end of the cable is in fault according to the voltage range to which the voltage value belongs. According to the scheme, under the condition that one signal line is used, the current sensing circuit for detecting the cable fault is added to the input end of the cable, so that the cable fault detection device can detect whether the input end or the output end of the cable is in fault or not through the voltage at the specific position of the current sensing circuit, and further can determine whether the input end or the output end of the cable is in fault or not under the condition that communication resources are not occupied.
Example 2
An embodiment of the present invention provides a method for detecting a cable fault, where when a current sensing circuit is configured at an input end of a cable, as shown in fig. 2, the method includes:
201. and configuring the current sensing circuit at the input end of the cable, detecting the voltage between the first output end or the second output end of the current sensing device and the grounding end, and obtaining the voltage value between the first output end or the second output end and the grounding end.
Specifically, in a first case, the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the second resistor, the input end of the second resistor is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable. At this time, the cable fault detection apparatus may detect a voltage between the first output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal and the ground terminal.
Fig. 3 is a schematic structural diagram of a current sensing circuit. Wherein, the output of second power VCC2 with first resistance R's input is connected, first resistance R's output with current sensing device H's input 1 is connected, current sensing device H's first output 4 with second resistance R1's output is connected, second resistance R1's input with first power VCC 1's output is connected, ground GND is connected to current sensing device H's second output 3, current sensing device H's third output 2 with the input 1_ F of cable is connected. At this time, the voltage between the first output terminal of the current sensing device and the ground terminal may be: the voltage between the output end 1_1 of the second resistor and the ground end GND or the voltage between the first output end 4 of the current sensing device and the ground end GND. Wherein a is a structural schematic diagram of a current sensing circuit when the current sensing device is a photoelectric coupler; b is a structural schematic diagram of a current sensing circuit when the current sensing device is a relay.
In a second case, the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal, and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the input end of the second resistor, the output end of the second resistor is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable. At this time, the cable fault detection apparatus may detect a voltage between the second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal.
Fig. 4 is a schematic structural diagram of another current sensing circuit. Wherein, the output of second power VCC2 with first resistance R's input is connected, first resistance R's output with current sensing device H's input 1 is connected, current sensing device H's first output 4 with first power VCC 1's output is connected, current sensing device H's second output 3 with second resistance R1's input is connected, second resistance R1's output is connected with ground connection GDN, current sensing device H's third output 2 with the input 1_ F of cable is connected. At this time, the voltage between the second output terminal of the current sensing device and the ground terminal may be: the voltage between the input end 1_2 of the second resistor and the ground end GND or the voltage between the second output end 3 of the current sensing device and the ground end GND. Wherein a is a structural schematic diagram of a current sensing circuit when the current sensing device is a photoelectric coupler; b is a structural schematic diagram of a current sensing circuit when the current sensing device is a relay.
It should be noted that the first power supply and the second power supply are determined by the system operating voltage and the acceptable operating voltage of the device. The first power source and the second power source may be the same power source, e.g., both the first power source and the second power source are hazardous voltages. Of course, the first power source may be a dangerous voltage, and the second power source may be a safe voltage. The resistance values of the first resistor and the second resistor are determined by the working current of the current sensing device, the first power supply and the second power supply together, and the working current of the current sensing device is guaranteed to be within an allowable working range.
202. And determining whether the input end of the cable is in fault according to the voltage range to which the voltage value belongs.
Specifically, when the current sensing circuit is in the first condition, if the cable is normal, the current sensing device is closed, and a current passes through the second resistor, so that the voltage between the first output end and the ground end is a low voltage; if the cable is in fault, the current sensing device is disconnected, no current passes through the second resistor, and the voltage between the first output end and the grounding end is high voltage. Therefore, the determining whether the input end of the cable is faulty according to the voltage value specifically includes: if the voltage value is a high level, determining that the input end of the cable has a fault; and if the voltage value is low level, determining that the input end of the cable is normal.
When the current sensing circuit is in the second condition, if the cable is normal, the current sensing device is closed, and current passes through the second resistor, so that the voltage between the second output end and the grounding end is high voltage; if the cable is in fault, the current sensing device is disconnected, no current passes through the second resistor, and the voltage between the second output end and the grounding end is low voltage. Therefore, the determining whether the input end of the cable is faulty according to the voltage value specifically includes: if the voltage value is a low level, determining that the input end of the cable has a fault; and if the voltage value is a high level, determining that the input end of the cable is normal.
Note that the low level generally refers to a voltage close to 0, and the high level generally refers to a voltage close to the system operating voltage.
In order to enable the output end of the cable to have a power isolation function, that is, signals can be transmitted between dangerous voltage and safe voltage, and two devices connected by the cable can detect the fault of the cable, the output end of the cable can be provided with a current sensing circuit, and whether the output end of the cable is in fault or not can be judged by detecting the voltage between the first output end or the second output end of the current sensing circuit and the grounding end. Wherein the current sensing circuit comprises at least: the cable comprises a current sensing device connected with the input end or the output end of the cable, a first power supply connected with the first output end of the current sensing device, and a grounding end connected with the second output end of the current sensing device.
203. And configuring the current sensing circuit at the output end of the cable, detecting the voltage between the first output end or the second output end of the current sensing device and the grounding end, and obtaining the voltage value between the first output end or the second output end and the grounding end.
Specifically, in a first case, the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal and the current sensing device; the output end of the first power supply is connected with the input end of the third resistor, the first output end of the current sensing device is connected with the output end of the third resistor, the second output end of the current sensing device is connected with the grounding end, the third output end is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device. At this time, the cable fault detection apparatus may detect a voltage between the first output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal and the ground terminal.
Fig. 5 is a schematic structural diagram of a current sensing circuit. Wherein, the output of first power VCC1 with the input of third resistance R2 is connected, the first output 4 of current sensing device H with the output of third resistance R2 is connected, the second output 3 and the third output 2 of current sensing device H are connected with ground terminal GND, the output 1_ M of cable with the input 1 of current sensing device H is connected. At this time, the voltage between the first output terminal of the current sensing device and the ground terminal may be: the voltage between the output end 2_1 of the third resistor and the ground end GND or the voltage between the first output end 4 of the current sensing device and the ground end GND. Wherein a is a structural schematic diagram of a current sensing circuit when the current sensing device is a photoelectric coupler; b is a structural schematic diagram of a current sensing circuit when the current sensing device is a relay.
In a second case, the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal, and the current sensing device; the output end of the first power supply is connected with the first output end of the current sensing device, the second output end of the current sensing device is connected with the input end of the third resistor, the output end of the third resistor is connected with the grounding end, the third output end of the current sensing device is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device. At this time, the cable fault detection apparatus may detect a voltage between the second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal.
Fig. 6 is a schematic structural diagram of another current sensing circuit. Wherein, the output of first power VCC1 with the first output 4 of current sensing device H is connected, the second output 3 of current sensing device H with the input of third resistance R2 is connected, the output of third resistance R2 is connected with ground terminal GND, the third output 2 of current sensing device H is connected with ground terminal GND, the output 1_ M of cable with input 1 of current sensing device H is connected. At this time, the voltage between the second output terminal of the current sensing device and the ground terminal may be: an input terminal 2_2 of the third resistor or a second output terminal 3 of the current sensing device. Wherein a is a structural schematic diagram of a current sensing circuit when the current sensing device is a photoelectric coupler; b is a structural schematic diagram of a current sensing circuit when the current sensing device is a relay.
It should be noted that the first power supply and the second power supply are determined by the system operating voltage and the acceptable operating voltage of the device. The resistance value of the third resistor is determined by the working current of the current sensing device and the first power supply together, and the working current of the current sensing device is ensured to be within an allowable working range. Generally, the working range of the current of the port of the current sensing device connected with the third resistor is large, so that the third resistor can be selected by firstly adopting a common power resistor and then selecting a proper resistance value of the resistor on the basis of meeting the power requirement of the resistor according to the voltage provided by the first power supply.
204. And determining whether the output end of the cable is in fault according to the voltage range to which the voltage value belongs.
Specifically, when the current sensing circuit is in the first condition, if the cable is normal, the current sensing device is closed, and a current passes through the second resistor, so that the voltage between the first output end and the ground end is a low voltage; if the cable is in fault, the current sensing device is disconnected, no current passes through the second resistor, and the voltage between the first output end and the grounding end is high voltage. Therefore, the determining whether the output end of the cable fails according to the voltage value specifically includes: determining whether the voltage value is a high level; if the voltage value is a high level, determining that the output end of the cable has a fault; and if the voltage value is low level, determining that the output end of the cable is normal.
When the current sensing circuit is in the second condition, if the cable is normal, the current sensing device is closed, and current passes through the second resistor, so that the voltage between the second output end and the ground end is high voltage; if the cable is in fault, the current sensing device is disconnected, no current passes through the second resistor, and the voltage between the second output end and the grounding end is low voltage. Therefore, the determining whether the output end of the cable fails according to the voltage value specifically includes: determining whether the voltage value is a low level; if the voltage value is a low level, determining that the output end of the cable has a fault; and if the voltage value is a high level, determining that the output end of the cable is normal.
It should be noted that, the steps 201-202 and the steps 203-204 have no timing relationship.
Wherein the current sensing device comprises: any one of an optical coupler, a relay and a Hall device.
The embodiment of the invention provides a method for detecting a cable fault, which comprises the steps of detecting the voltage between a first output end or a second output end of a current sensing device and a grounding end to obtain the voltage value between the first output end or the second output end and the grounding end; and determining whether the input end of the cable is in fault according to the voltage range to which the voltage value belongs. According to the scheme, under the condition that one signal line is used, the current sensing circuit for detecting the cable fault is added to the input end of the cable, so that the cable fault detection device can detect whether the input end or the output end of the cable is in fault or not through the voltage at the specific position of the current sensing circuit, and further can determine whether the input end or the output end of the cable is in fault or not under the condition that communication resources are not occupied.
Example 3
The embodiment of the invention provides a cable fault detection device, wherein a current sensing circuit is configured at the input end or the output end of a cable, and the current sensing circuit at least comprises: when the current sensing device connected to the input terminal or the output terminal of the cable, the first power supply connected to the first output terminal of the current sensing device, and the ground terminal connected to the second output terminal of the current sensing device are connected to each other, as shown in fig. 7, the cable fault detecting apparatus 70 includes: a detection unit 71 and a determination unit 72.
The detecting unit 71 is configured to detect a voltage between the first output terminal or the second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal or the second output terminal and the ground terminal.
The determining unit 72 is configured to determine whether the input end or the output end of the cable is faulty according to the voltage range to which the voltage value obtained by the detecting unit 71 belongs.
Further, the current sensing circuit is arranged at the input end of the cable; the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the second resistor, the input end of the second resistor is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable.
Then, the detecting unit 71 is specifically configured to detect a voltage between the first output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal and the ground terminal;
the determining unit 72 is specifically configured to:
if the voltage value is a high level, determining that the input end of the cable has a fault;
and if the voltage value is low level, determining that the input end of the cable is normal.
Further, the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal, and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the input end of the second resistor, the output end of the second resistor is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable.
Then, the detecting unit 71 is specifically configured to detect a voltage between the second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal;
the determining unit 72 is specifically configured to:
if the voltage value is a low level, determining that the input end of the cable has a fault;
and if the voltage value is a high level, determining that the input end of the cable is normal.
Further, the first power supply and the second power supply are dangerous voltages;
or,
the first power supply is a dangerous voltage and the second power supply is a safe voltage.
Further, the current sensing circuit is configured at the output end of the cable; the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal and the current sensing device; the output end of the first power supply is connected with the input end of the third resistor, the first output end of the current sensing device is connected with the output end of the third resistor, the second output end of the current sensing device is connected with the grounding end, the third output end is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
the detecting unit 71 is specifically configured to detect a voltage between a first output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal and the ground terminal;
the determining unit 72 is specifically configured to:
if the voltage value is a high level, determining that the output end of the cable has a fault;
if the voltage value is a low level, determining that the output end of the cable is normal;
or,
the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal, and the current sensing device; the output end of the first power supply is connected with the first output end of the current sensing device, the second output end of the current sensing device is connected with the input end of the third resistor, the output end of the third resistor is connected with the grounding end, the third output end of the current sensing device is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
the detecting unit 71 is specifically configured to detect a voltage between the second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal;
the determining unit 72 is specifically configured to:
if the voltage value is a low level, determining that the output end of the cable has a fault;
and if the voltage value is a high level, determining that the output end of the cable is normal.
Further, the current sensing device includes: any one of an optical coupler, a relay and a Hall device.
The embodiment of the invention provides a cable fault detection device, wherein a detection unit detects the voltage between a first output end or a second output end of a current sensing device and a grounding end to obtain the voltage value between the first output end or the second output end and the grounding end; the determining unit determines whether the input end or the output end of the cable is in fault according to the voltage range to which the voltage value obtained by the detecting unit belongs. According to the scheme, under the condition that one signal line is used, the current sensing circuit for detecting the cable fault is added to the input end of the cable, so that the cable fault detection device can detect whether the input end or the output end of the cable is in fault or not through the voltage at the specific position of the current sensing circuit, and further can determine whether the input end or the output end of the cable is in fault or not under the condition that communication resources are not occupied.
Example 4
The embodiment of the invention provides a cable fault detection device, wherein a current sensing circuit is configured at the input end or the output end of a cable, and the current sensing circuit at least comprises: when the current sensing device connected to the input terminal or the output terminal of the cable, the first power supply connected to the first output terminal of the current sensing device, and the ground terminal connected to the second output terminal of the current sensing device are connected to each other, as shown in fig. 8, the cable fault detecting apparatus 80 includes: a processor 81 and a memory 82.
The processor 81 is configured to detect a voltage between the first output terminal or the second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal or the second output terminal and the ground terminal.
The memory 82 is configured to store a voltage value between the first output terminal or the second output terminal and the ground terminal.
The processor 81 is further configured to determine whether the input end or the output end of the cable is faulty according to the voltage range to which the voltage value belongs.
Further, the current sensing circuit is arranged at the input end of the cable; the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the second resistor, the input end of the second resistor is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable.
Then, the processor 81 is specifically configured to detect a voltage between a first output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal and the ground terminal;
the processor 81 is specifically configured to:
if the voltage value is a high level, determining that the input end of the cable has a fault;
and if the voltage value is low level, determining that the input end of the cable is normal.
Further, the current sensing circuit specifically includes: the first power supply, the second power supply, the first resistor, the second resistor, the ground terminal, and the current sensing device; the output end of the second power supply is connected with the input end of the first resistor, the output end of the first resistor is connected with the input end of the current sensing device, the first output end of the current sensing device is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the input end of the second resistor, the output end of the second resistor is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable.
Then, the processor 81 is specifically configured to detect a voltage between a second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal;
the processor 81 is specifically configured to:
if the voltage value is a low level, determining that the input end of the cable has a fault;
and if the voltage value is a high level, determining that the input end of the cable is normal.
Further, the first power supply and the second power supply are dangerous voltages;
or,
the first power supply is a dangerous voltage and the second power supply is a safe voltage.
Further, the current sensing circuit is configured at the output end of the cable; the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal and the current sensing device; the output end of the first power supply is connected with the input end of the third resistor, the first output end of the current sensing device is connected with the output end of the third resistor, the second output end of the current sensing device is connected with the grounding end, the third output end is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
the processor 81 is specifically configured to detect a voltage between a first output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal and the ground terminal;
the processor 81 is specifically configured to:
if the voltage value is a high level, determining that the output end of the cable has a fault;
if the voltage value is a low level, determining that the output end of the cable is normal;
or,
the current sensing circuit specifically includes: the first power supply, the third resistor, the ground terminal, and the current sensing device; the output end of the first power supply is connected with the first output end of the current sensing device, the second output end of the current sensing device is connected with the input end of the third resistor, the output end of the third resistor is connected with the grounding end, the third output end of the current sensing device is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
the processor 81 is specifically configured to detect a voltage between a second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal;
the processor 81 is specifically configured to:
if the voltage value is a low level, determining that the output end of the cable has a fault;
and if the voltage value is a high level, determining that the output end of the cable is normal.
Further, the current sensing device includes: any one of an optical coupler, a relay and a Hall device.
The embodiment of the invention provides a cable fault detection device, wherein a processor detects the voltage between a first output end or a second output end of a current sensing device and a grounding end to obtain the voltage value between the first output end or the second output end and the grounding end; and the processor determines whether the input end or the output end of the cable has a fault according to the voltage range to which the voltage value belongs. According to the scheme, under the condition that one signal line is used, the current sensing circuit for detecting the cable fault is added to the input end of the cable, so that the cable fault detection device can detect whether the input end or the output end of the cable is in fault or not through the voltage at the specific position of the current sensing circuit, and further can determine whether the input end or the output end of the cable is in fault or not under the condition that communication resources are not occupied.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A method for detecting cable faults is characterized in that a current sensing circuit is configured at the input end or the output end of a cable, and the current sensing circuit comprises: the circuit comprises a first power supply, a second power supply, a first resistor, a second resistor, a grounding terminal and a current sensing device; the output end of the second power supply is connected with the input end of the first resistor, and the output end of the first resistor is connected with the input end of the current sensing device;
when the first output end of the current sensing device is connected with the output end of the second resistor, the input end of the second resistor is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the ground end, and the third output end of the current sensing device is connected with the input end of the cable, the method comprises the following steps:
detecting the voltage between a first output end of the current sensing device and the grounding end to obtain a voltage value between the first output end and the grounding end;
determining whether the output end of the cable is in fault according to the voltage range to which the voltage value belongs;
if the voltage value is a high level, determining that the input end of the cable has a fault;
if the voltage value is a low level, determining that the input end of the cable is normal;
when a first output end of the current sensing device is connected with an output end of the first power supply, a second output end of the current sensing device is connected with an input end of the second resistor, an output end of the second resistor is connected with the ground end, and a third output end of the current sensing device is connected with an input end of the cable, the method includes:
detecting the voltage between a second output end of the current sensing device and the grounding end to obtain a voltage value between the second output end and the grounding end;
determining whether the output end of the cable is in fault according to the voltage range to which the voltage value belongs;
if the voltage value is a low level, determining that the input end of the cable has a fault;
if the voltage value is a high level, determining that the input end of the cable is normal;
the second power supply is a direct current power supply, and the first power supply and the second power supply are dangerous voltages; or, the first power supply is a dangerous voltage, and the second power supply is a safe voltage.
2. The method of claim 1, wherein the current sensing device comprises: any one of an optical coupler, a relay and a Hall device.
3. A method for detecting cable faults is characterized in that a current sensing circuit is configured at the input end or the output end of a cable, and the current sensing circuit comprises: the circuit comprises a first power supply, a third resistor, a grounding end and a current sensing device; the third output end of the current sensing device is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
when the output end of the first power supply is connected with the input end of the third resistor, the first output end of the current sensing device is connected with the output end of the third resistor, and the second output end of the current sensing device is connected with the ground end, the method includes:
detecting the voltage between a first output end of the current sensing device and the grounding end to obtain a voltage value between the first output end and the grounding end;
determining whether the output end of the cable is in fault according to the voltage range to which the voltage value belongs;
if the voltage value is a high level, determining that the output end of the cable has a fault;
if the voltage value is a low level, determining that the output end of the cable is normal;
when the output end of the first power supply is connected with the first output end of the current sensing device, the second output end of the current sensing device is connected with the input end of the third resistor, and the output end of the third resistor is connected with the ground end, the method includes:
detecting the voltage between a second output end of the current sensing device and the grounding end to obtain a voltage value between the second output end and the grounding end;
determining whether the output end of the cable is in fault according to the voltage range to which the voltage value belongs;
if the voltage value is a low level, determining that the output end of the cable has a fault;
if the voltage value is a high level, determining that the output end of the cable is normal;
wherein the output end of the cable outputs direct current.
4. The method of claim 3, wherein the current sensing device comprises: any one of an optical coupler, a relay and a Hall device.
5. A cable fault detection device, wherein a current sensing circuit is provided at an input end or an output end of a cable, the cable fault detection device comprising: a detection unit and a determination unit;
the current sensing circuit includes: the circuit comprises a first power supply, a second power supply, a first resistor, a second resistor, a grounding terminal and a current sensing device; the output end of the second power supply is connected with the input end of the first resistor, and the output end of the first resistor is connected with the input end of the current sensing device;
when the first output end of the current sensing device is connected with the output end of the second resistor, the input end of the second resistor is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable;
the detection unit is used for detecting the voltage between the first output end of the current sensing device and the grounding end to obtain the voltage value between the first output end and the grounding end;
the determining unit is used for determining whether the input end or the output end of the cable has a fault according to the voltage range to which the voltage value obtained by the detecting unit belongs;
if the voltage value is a high level, determining that the input end of the cable has a fault;
if the voltage value is a low level, determining that the input end of the cable is normal;
when the first output end of the current sensing device is connected with the output end of the first power supply, the second output end of the current sensing device is connected with the input end of the second resistor, the output end of the second resistor is connected with the grounding end, and the third output end of the current sensing device is connected with the input end of the cable;
the detection unit is specifically configured to detect a voltage between a second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal;
the determining unit is used for determining whether the input end or the output end of the cable has a fault according to the voltage range to which the voltage value obtained by the detecting unit belongs;
if the voltage value is a low level, determining that the input end of the cable has a fault;
if the voltage value is a high level, determining that the input end of the cable is normal;
the second power supply is a direct current power supply, and the first power supply and the second power supply are dangerous voltages; or, the first power supply is a dangerous voltage, and the second power supply is a safe voltage.
6. The cable fault detection device of claim 5, wherein the current sensing means comprises: any one of an optical coupler, a relay and a Hall device.
7. A cable fault detection device, wherein a current sensing circuit is provided at an input end or an output end of a cable, the cable fault detection device comprising: a detection unit and a determination unit; the current sensing circuit includes: the current sensing device comprises a first power supply, a third resistor, a ground terminal and a current sensing device; the third output end of the current sensing device is connected with the grounding end, and the output end of the cable is connected with the input end of the current sensing device;
when the output end of the first power supply is connected with the input end of the third resistor, the first output end of the current sensing device is connected with the output end of the third resistor, and the second output end of the current sensing device is connected with the ground end;
the detection unit is specifically configured to detect a voltage between a first output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the first output terminal and the ground terminal;
the determining unit is used for determining whether the input end or the output end of the cable has a fault according to the voltage range to which the voltage value obtained by the detecting unit belongs;
if the voltage value is a high level, determining that the output end of the cable has a fault;
if the voltage value is a low level, determining that the output end of the cable is normal;
when the output end of the first power supply is connected with the first output end of the current sensing device, the second output end of the current sensing device is connected with the input end of the third resistor, and the output end of the third resistor is connected with the grounding end;
the detection unit is specifically configured to detect a voltage between a second output terminal of the current sensing device and the ground terminal, and obtain a voltage value between the second output terminal and the ground terminal;
the determining unit is used for determining whether the input end or the output end of the cable has a fault according to the voltage range to which the voltage value obtained by the detecting unit belongs;
if the voltage value is a low level, determining that the output end of the cable has a fault;
if the voltage value is a high level, determining that the output end of the cable is normal;
wherein the output end of the cable outputs direct current.
8. The cable fault detection device of claim 7, wherein the current sensing means comprises: any one of an optical coupler, a relay and a Hall device.
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