WO2019223414A1

WO2019223414A1 - Cable conduction test method, device and test equipment

Info

Publication number: WO2019223414A1
Application number: PCT/CN2019/079196
Authority: WO
Inventors: 张洪月; 黄召明; 常杰; 耿天宇; 栾明; 房少君; 闫君
Original assignee: 中车青岛四方机车车辆股份有限公司
Priority date: 2018-05-25
Filing date: 2019-03-22
Publication date: 2019-11-28
Also published as: CN108983019A

Abstract

Provided in the invention are a cable conduction test method, a device (101) and test equipment. The method comprises: according to physical addresses corresponding to start and end terminals of a to-be-tested cable, enabling communication between an input channel of test equipment and the start terminal, and enabling communication between an output channel of the test equipment and the end terminal (S210); initiating a point-to-point conduction test from the start terminal to the end terminal according to a test configuration corresponding to the to-be-tested cable (S220); and according to a result of the point-to-point conduction test, determining a conduction resistance of the to-be-tested cable, and if the conduction resistance of the to-be-tested cable is beyond a preset resistance criterion range, then identifying the to-be-tested cable as a fault cable (S230). The fault cable can be identified rapidly, onsite fault checking time of workers is reduced greatly, and the test accuracy is high.

Description

Cable continuity test method, device and test equipment

cross reference

This application refers to Chinese Patent Application No. 2018105154292 entitled “Cable Continuity Test Method, Apparatus, and Test Equipment” filed on May 25, 2018, which is incorporated by reference in its entirety.

Technical field

The embodiments of the present application relate to the technical field of testing, and in particular, to a method, a device, and a test device for testing the continuity of a cable.

Background technique

With the continuous improvement of the speed of the EMU, how to improve the driving safety is the most important issue during the design and use of the EMU. Electric vehicle cable insulation test is an important part of the performance test process of the production line and maintenance line of the EMU, which accounts for 50% of the entire electrical test task. Quickly obtaining the performance status of the vehicle cable can greatly reduce safety risks and reduce A failure occurred.

The conventional cable continuity test uses a manual and manual detection method, using a multimeter and a pin jack line to check point by point. This method has a considerable workload and requires careful testing by two professional testers. In addition, manual detection can only detect the conduction and non-conduction between two points, and there is no effective means to detect the short circuit of the cable (that is, misconnection, multiconnection).

The EMU cable distribution is complicated. The number of cables in the first car is greater than 6000, and the number of cables in each car is about 4,000. It is necessary to complete fast and accurate testing and rapid error detection to meet the needs of vehicle production and maintenance. Obviously Traditional test methods are not applicable.

Summary of the Invention

In view of the defects in the prior art, the embodiments of the present application provide a cable continuity test method, device, and test equipment, which can realize rapid identification of a faulty cable, greatly saving the time for troubleshooting troubles of workers on site, and test accuracy. high.

In one aspect, an embodiment of the present application provides a cable continuity test method, including:

According to the physical addresses corresponding to the start and end ends of the cable under test, the communication between the input channel of the test equipment and the start end, and the communication between the output channel of the test equipment and the end end ;

Starting a point-to-point continuity test from the start point to the end point according to a test configuration corresponding to the cable to be tested;

Determine the on-resistance of the cable under test according to the result of the point-to-point continuity test, and identify the cable under test if the on-resistance of the cable under test is outside a preset resistance criterion range Is the faulty cable.

On the other hand, an embodiment of the present application provides a cable continuity test device, including:

The cable connection unit is configured to perform communication between an input channel of the test device and the start point and an output channel of the test device and the physical address corresponding to the start and end ends of the cable to be tested. Communication between the end points;

A cable test unit configured to start a point-to-point continuity test from the start point to the end point according to a test configuration corresponding to the cable to be tested;

The fault detection unit is configured to determine the on-resistance of the cable under test according to the result of the point-to-point continuity test. If the on-resistance of the cable under test is outside a preset resistance criterion range, Then, the cable under test is identified as a faulty cable.

In another aspect, an embodiment of the present application provides a test device, comprising: the cable continuity test device according to claim 9, an excitation source, a signal collector, and a plurality of switch matrices;

Wherein, the cable continuity test device is connected to the excitation source, the signal collector, and the switch matrix; the switch matrix is connected to the excitation source and the signal collector; the switch matrix There are multiple channels, and each channel is provided with a corresponding relay.

The cable continuity test method, device, and test equipment provided in the embodiments of the present application use the cable continuity test device to perform the input channels of the test equipment and the corresponding physical addresses according to the respective physical addresses of the start and end ends of the cable to be tested. The communication between the starting point and the output channel of the test equipment and the terminal end; according to the test configuration corresponding to the cable to be tested, the point-to-point guidance from the starting point to the ending point is started. Continuity test; determining the on-resistance of the cable under test according to the result of the point-to-point continuity test; if the on-resistance of the cable under test is outside a preset resistance criterion range, identifying the The test cable is a faulty cable. In this way, compared with the traditional point-to-point manual test method, the solution provided in the embodiment of the present application can realize the rapid identification of the faulty cable, greatly save the troubleshooting time for workers on-site operation, and the test accuracy is high.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present application or the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

FIG. 1 is a schematic structural diagram of a test device according to an embodiment of the present application; FIG.

FIG. 2 shows an exemplary flowchart of a cable continuity test method according to an embodiment of the present application;

3 is a schematic structural diagram of a cable continuity test device according to an embodiment of the present application;

4 is a schematic structural diagram of a cable continuity test device according to another embodiment of the present application;

FIG. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed ways

The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The terms “module” and “device” used in this application are intended to include computer-related entities such as, but not limited to, hardware, firmware, software and hardware combinations, software, or software in execution. For example, a module may be, but is not limited to, a process running on a processor, a processor, an object, an executable program, a thread of execution, a program, and / or a computer. For example, both an application running on a computing device and this computing device can be a module. One or more modules may be located within a process and / or thread of execution, and a module may also be located on one computer and / or distributed between two or more computers.

The technical solution of the present application is described in detail below with reference to the drawings.

Referring to FIG. 1, a schematic structural diagram of a test device according to an embodiment of the present application is shown.

As shown in FIG. 1, the test equipment provided in the embodiment of the present application may include: a cable continuity test device 101, an excitation source 102, a signal collector 103, and a plurality of switch matrices 104.

Wherein, the cable continuity test device is connected to the excitation source, the signal collector, and the switch matrix;

The switch matrix is connected to the excitation source and the signal collector; a plurality of channels are provided in the switch matrix, for example, each switch matrix may include 50 channels. Each channel is provided with a corresponding relay. In this way, the channel can be turned on or off by the response relay.

In the embodiment of the present application, the excitation source 102 is configured to provide a constant current excitation signal when conducting a continuity test. Alternatively, the excitation source may be replaced by a low-voltage DC voltage source, and the voltage may be 12V.

The signal collector 103 is configured to acquire a voltage signal and a current signal in a loop in order to calculate a loop resistance.

The switch matrix 104 includes multiple channels, and the corresponding relays are used to switch the channels on and off, thereby realizing any two-channel switching.

In the embodiment of the present application, the cable continuity test device 101 is configured to, after all the cables to be tested of the train group are connected to the channels of the test equipment, for each cable to be tested, according to the cable to be tested The respective channels corresponding to the start point and the end point of each of the channels, and the physical addresses corresponding to the channels, respectively, record the physical addresses corresponding to the start and end points of the cable under test.

Further, the cable continuity test device 101 is further configured to perform communication between the input channel of the test equipment and the starting point according to the physical addresses corresponding to the starting point and the ending point of the cable under test, and the The communication between the output channel of the test device and the end point; starting a point-to-point continuity test from the start point to the end point according to the test configuration corresponding to the cable under test; according to the result of the point-to-point continuity test, Determine the on-resistance of the cable under test, and if the on-resistance of the cable under test is outside a preset resistance criterion range, identify the cable under test as a faulty cable.

Further, the cable continuity test device 101 is specifically configured to close a relay of a channel corresponding to a physical address corresponding to a starting end of the cable to be tested, so that an input channel of a test device communicates with the starting end; The relay of the channel corresponding to the physical address corresponding to the terminal end of the cable to be tested, so that the output channel of the test equipment communicates with the terminal end.

Further, the cable continuity test device 101 is further configured to select one end from a start end and an end end of the faulty cable as the fault input end, and use the physical address corresponding to the fault input end as the fault input address;

Less than the fault of the physical address to the address input packet sequence, to obtain N packets Y _i, Y _i packet includes one or more physical addresses; wherein, N is an integer greater than 1, the value I [1, N ]; i is greater than 1, the physical address of each packet Y _i Y _i are greater than _1-packet for each physical addresses;

The faulty cable fault detection is performed on the faulty output channel T _i in sequence, wherein the faulty output channel T _{i is} composed of channels corresponding to all the physical addresses included in the group Y _i .

Further, the cable continuity test device 101 is specifically configured to start a one-to-many point continuity test from the faulty input terminal to the faulty output channel T _i according to a test configuration corresponding to the faulty cable; The result of the point continuity test is to determine whether the cable corresponding to the faulty input end and the faulty output channel T _i has a wrong connection and short-circuit relationship; if it is, find out all cables corresponding to the faulty output channel T _i The faulty cable has a cable with a wrong connection and short-circuit relationship; if not, further judge whether i is N; if not, start the one-to-multipoint conduction of the faulty input terminal to the faulty output channel T _{i + 1} Test; if yes, identify the faulty cable as an empty spot.

Further, the cable continuity test device 101 is specifically configured to compare the physical address corresponding to the starting end of the faulty cable with the physical address corresponding to the end; if the physical address corresponding to the starting end of the faulty cable is greater than the end If the physical address corresponding to the terminal is selected as the fault input terminal, if the physical address corresponding to the starting point of the faulty cable is smaller than the physical address corresponding to the terminal end, then the starting terminal is selected as the fault input terminal.

Further, the cable continuity test device 101 is specifically configured to determine the resistance of the circuit under test according to the result of the one-to-multipoint continuity test; if the resistance of the circuit under test is in the resistance criterion in the test configuration Within the range, it is determined that the cable corresponding to the faulty input terminal and the faulty output channel T _i has a wrong connection and short-circuit relationship; if the resistance of the circuit under test is outside the resistance criterion range in the test configuration, It is determined that all cables corresponding to the faulty input end and the faulty output channel T _i do not have a faulty short-circuit relationship.

Further, the cable continuity test device 101 is specifically configured to divide the fault output channel T _i to obtain two sub-channels: a first sub-channel and a second sub-channel, and each physical address corresponding to the first sub-channel is Smaller than each physical address corresponding to the second sub-channel; starting a point-to-multipoint continuity test from the fault input terminal to the first sub-channel; judging the fault based on a result of the point-to-multipoint continuity test Whether the cable corresponding to the input terminal and the first sub-channel has a wrong connection and short-circuit relationship; if so, continue to divide the first sub-channel until the sub-channel contains only one channel, and determine the line corresponding to the channel There is a misconnection short connection between the cable and the faulty cable; if not, then all cables corresponding to the second sub-channel are searched for a cable that has a misconnection short connection with the faulty cable.

The test equipment provided in the embodiment of the present application uses a cable continuity test device to perform communication between an input channel of the test equipment and the start end according to the physical addresses corresponding to the start and end ends of the cable to be tested, and The communication between the output channel of the test device and the end point; starting the point-to-point continuity test from the start point to the end point according to the test configuration corresponding to the cable under test; As a result, the on-resistance of the cable under test is determined, and if the on-resistance of the cable under test is outside a preset resistance criterion range, the cable under test is identified as a faulty cable. In this way, compared with the traditional point-to-point manual test method, the solution provided in the embodiment of the present application can realize the rapid identification of the faulty cable, greatly save the troubleshooting time for workers on-site operation, and the test accuracy is high.

Referring to FIG. 2, an exemplary flowchart of a cable continuity test method according to an embodiment of the present application is shown. The cable continuity test method is applicable to a cable continuity test device 101.

As shown in FIG. 2, a cable continuity test method provided in an embodiment of the present application may include the following steps:

S210: Perform communication between the input channel of the test device and the start point and the output channel of the test device and the end point according to the physical addresses corresponding to the start and end ends of the cable under test. Connected.

In the embodiment of the present application, before testing a cable to be tested, a corresponding physical address needs to be assigned to each channel in the test device in advance. For example, you can order the test equipment channel position, each channel is assigned a unique physical address, with 50 channels as a group, the address format is four digits, the leftmost two digits indicate the group number, and the group number range is 00- 99; The right two digits indicate the channel number, and the channel number range is 01-50. For example, 0001-0050 represents the physical address of the first group of channels; 0101-0150 represents the physical address of the second group of channels; and so on.

In the embodiment of the present application, before testing the cables to be tested, all the cables to be tested of the train group need to be connected to each channel of the test equipment.

In this way, after all the cables to be tested of the train group are connected to the channels of the test equipment, the cable continuity test device 101 may, for each cable to be tested, according to the start and end ends of the cable to be tested The corresponding channel and the physical address of each channel respectively record the physical addresses of the start and end ends of the cable under test.

In the embodiment of the present application, in the process of testing the current cable to be tested, the cable continuity test device 101 may first determine the physical addresses corresponding to the start and end ends of the current cable to be tested, and then, Closing the relay of the channel corresponding to the physical address corresponding to the starting end of the cable to be tested, so that the input channel of the test equipment communicates with the starting point; closing the physical address corresponding to the terminal end of the cable to be tested A relay of a corresponding channel, so that the output channel of the test equipment is in communication with the end terminal.

In this way, the cable under test and the excitation source in the test equipment can form the circuit under test.

S220: Start a point-to-point continuity test from the start point to the end point according to a test configuration corresponding to the cable to be tested.

In the embodiment of the present application, after the communication between the test equipment and the cable to be tested is achieved, the cable continuity test apparatus 101 may obtain a test configuration corresponding to the cable to be tested.

In practical applications in China, the test configuration may include, but is not limited to: the physical address corresponding to the starting point, the physical address corresponding to the end point, test excitation requirements, and resistance determination range.

Then, the cable continuity test device 101 can configure the excitation source according to the test excitation requirements in the test configuration, so that the excitation source outputs a constant current excitation signal, thereby starting the point-to-point continuity test of the starting point to the end point of the cable under test. .

S230: Determine the on-resistance of the cable to be tested according to the result of the point-to-point continuity test. If the on-resistance of the cable to be tested is outside the preset resistance criterion, identify the to-be-tested cable. The cable is a faulty cable.

In the embodiment of the present application, after starting the point-to-point continuity test of the starting point to the end point of the cable under test, the constant current excitation signal output by the excitation source flows through the circuit under test; at the same time, the signal collector can collect the voltage of the circuit under test. Signal and current signal. In this way, the cable continuity test device 101 can determine the resistance of the circuit under test according to Ohm's law, that is, the on-resistance of the cable to be tested.

Then, it is determined whether the on-resistance of the cable to be tested is within the resistance criterion range according to a preset resistance criterion range. The resistance criterion range is set by a person skilled in the art according to the actual situation, for example, it can be set to [0,20] Ω.

If the on-resistance of the cable under test is within the resistance criterion, the cable under test is identified as a normal cable.

If the on-resistance of the cable under test is outside the range of the resistance criterion, the cable under test is identified as a faulty cable.

According to the cable continuity test method provided in the embodiment of the present application, according to the physical addresses corresponding to the start and end ends of the cables to be tested, the connection between the input channel of the test equipment and the start end, and the test are performed. Connect between the output channel of the device and the end point; start the point-to-point continuity test from the start point to the end point according to the test configuration corresponding to the cable under test; determine according to the result of the point-to-point continuity test If the on-resistance of the cable under test is outside the preset resistance criterion, the cable under test is identified as a faulty cable. In this way, compared with the traditional point-to-point manual test method, the solution provided in the embodiment of the present application can realize the rapid identification of the faulty cable, greatly save the troubleshooting time for workers on-site operation, and the test accuracy is high.

Further, based on the above embodiment, in the cable continuity test method provided by another embodiment of the present application, after the identification of the cable under test as a faulty cable, the method further includes the following steps:

Selecting one end of the faulty cable as the fault input end, and using the physical address corresponding to the fault input end as the fault input address;

In the embodiment of the present application, the cable continuity test device 101 may compare the physical address corresponding to the start end of the faulty cable with the physical address corresponding to the end end; if the physical address corresponding to the start point of the faulty cable is greater than the end point If the physical address corresponding to the terminal is selected as the fault input terminal, if the physical address corresponding to the starting point of the faulty cable is smaller than the physical address corresponding to the terminal end, then the starting terminal is selected as the fault input terminal.

After the fault input terminal is selected, the cable continuity test device 101 may determine the physical address corresponding to the fault input terminal as the fault input address.

In the embodiment of the present application, according to a low-order test principle, physical addresses smaller than the faulty input address may be sequentially grouped to obtain N groups Y _i . Y _i packets include one or more physical addresses; wherein, N is an integer greater than 1, i of values [1, N]; I is greater than 1, the physical address of each packet are Y _i Y _i-1 is greater than the packet Each physical address.

For example, when the fault input address is 0215, a physical address {0001˜0214} smaller than the fault input address 0215 may be determined; and then the physical addresses {0001˜0214} smaller than the fault input address 0215 may be determined. Starting from the smallest channel address 0001, packet Y ₁ includes {0001 ~ 0050}; packet Y ₂ includes {0101 ～ 0150}; and packet Y ₃ includes {0201 ～ 0214}.

In the embodiment of the present application, after sequentially grouping the physical addresses smaller than the fault input address, the fault output cable T _i can be used for fault detection of the faulty cable in sequence.

Specifically, the cable continuity test device 101 may start a point-to-multipoint continuity test from the fault input terminal to the fault output channel T _i according to a test configuration corresponding to the faulty cable; according to the point-to-multipoint continuity test, As a result of the test, it is determined whether the cable corresponding to the faulty input end and the faulty output channel T _i has a short-circuit connection; if so, the faulty line is found from all the cables corresponding to the faulty output channel T _i . The cable is connected to the cable with the wrong connection and short connection; if not, further judge whether i is N; if not, start the one-to-multipoint continuity test of the fault input end to the fault output channel T _{i + 1} ; if yes , It is identified that the faulty cable is an empty point.

In the embodiment of the present application, the cable continuity test device 101 may determine a physical address corresponding to each channel in the fault output channel T _i as a fault detection address.

Then, according to the fault input address and the fault detection address, the communication between the input channel of the test equipment and the fault input end of the faulty cable, and the connection between the output channel of the test equipment and the fault output channel T _i Connected.

Specifically, the relay corresponding to the channel corresponding to the physical address corresponding to the fault input end of the faulty cable may be closed, so that the input channel of the test equipment is in communication with the fault input end of the faulty cable; the fault output channel is closed Each channel in T _i corresponds to a relay, so that the output channel of the test equipment is in communication with each channel in the fault output channel T _i . In this way, the faulty cable and the cable corresponding to the faulty output channel T _i and the excitation source in the test equipment form the circuit under test. Wherein T _i corresponding to the output channel fault cable means within the fault output channel access cable T _i, T _i output channel corresponding to the failure of one or more cables.

Then, the cable continuity test device 101 may configure an excitation source according to a test configuration corresponding to the faulty cable, so that the excitation source outputs a constant current excitation signal to start the fault input end to the fault output channel T _i One-to-multipoint continuity test.

Then, the resistance of the circuit under test is determined according to the result of the one-to-multipoint continuity test; if the resistance of the circuit under test is outside the range of the resistance criterion in the test configuration, the fault input terminal and the All cables corresponding to the faulty output channel T _i do not have a wrong connection and short-circuit relationship.

In the embodiment of the present application, if all the cables corresponding to the faulty input end and the faulty output channel T _i do not have a faulty short-circuit relationship, it can be determined whether the faulty output channel T _i is a faulty output channel corresponding to the last packet. That is, whether i is the maximum value N, and if not, the one-to-multipoint continuity test of the fault input end to the next fault output channel T _{i + 1} is started. If the faulty output channel T _i is the last faulty output channel T _N , it means that all cables corresponding to all faulty output channels and faulty cables do not have a faulty short-circuit relationship, indicating that the faulty cable is an empty point. Therefore, The faulty cable can be identified as an empty point.

In the embodiment of the present application, if the resistance of the circuit under test is within the resistance criterion range in the test configuration, it is determined that the cable corresponding to the faulty input terminal and the faulty output channel T _{i is} misconnected and shorted. relationship.

In this way, the cable continuity test device 101 can find, from all the cables corresponding to the faulty output channel T _i , the cables that are in the wrong connection and short-circuit relationship with the faulty cable.

In the embodiment of the present application, a fast binary error detection processing method using a binary method can be used to quickly find cables that have a wrong connection and short connection relationship with the faulty cable.

Specifically, the cable continuity test device 101 may divide the fault output channel T _i to obtain two sub-channels: a first sub-channel and a second sub-channel, and each physical address corresponding to the first sub-channel is smaller than the physical address. Physical addresses corresponding to the second sub-channel; then, a one-to-multipoint continuity test from the fault input end to the first sub-channel is started; and the faulty input is judged based on the result of the one-to-multipoint continuity test Whether the cable corresponding to the first sub-channel has a wrong connection and short-circuit relationship; if so, continue to divide the first sub-channel until the sub-channel contains only one channel, and determine the cable corresponding to the channel There is a faulty short-circuit relationship with the faulty cable; if not, a cable with a faulty short-circuit relationship with the faulty cable is found from all cables corresponding to the second subchannel.

The other steps in the embodiment of the present application are similar to those in the foregoing embodiment, and details are not described in the embodiment of the present application.

The cable continuity test method provided by the embodiment of the present application uses the low-level test principle and the fast binary error detection processing method to perform fault detection of a faulty cable, and can quickly find the faulty connection relationship or empty point of the faulty cable. The connection relationship realizes rapid error detection of faulty cables, with fast error detection and high accuracy.

Based on the above embodiments, another embodiment of the present application provides a cable continuity test device.

Referring to FIG. 3, a schematic structural diagram of a cable continuity test device according to an embodiment of the present application is shown.

As shown in FIG. 3, the cable continuity test apparatus provided by the embodiment of the present application may include a cable communication unit 301, a cable test unit 302, and a fault identification unit 303.

The cable connection unit 301 is configured to perform communication between an input channel of a test device and the start point, and an output of the test device according to the physical addresses corresponding to the start and end ends of the cable to be tested. The communication between the channel and the terminal end.

The cable test unit 302 is configured to start a point-to-point continuity test from the start point to the end point according to a test configuration corresponding to the cable to be tested.

The fault identification unit 303 is configured to determine the on-resistance of the cable under test according to the result of the point-to-point continuity test. If the on-resistance of the cable under test is outside a preset resistance criterion range, then Identifying the cable under test as a faulty cable.

Optionally, the apparatus further includes: an address recording unit.

The address recording unit is configured to, after all the cables to be tested of the train group are connected to the channels of the test equipment, for each cable to be tested, according to the respective channels of the start and end ends of the cable to be tested , And the physical address corresponding to each channel, record the physical addresses corresponding to the start and end of the cable under test.

Optionally, the cable communication unit 301 is specifically configured to close a relay of a channel corresponding to a physical address corresponding to a starting end of the cable to be tested, so that an input channel of a test device communicates with the starting end; The relay of the channel corresponding to the physical address corresponding to the terminal end of the cable to be tested is described, so that the output channel of the test equipment communicates with the terminal end.

Optionally, referring to FIG. 4, a schematic structural diagram of a cable continuity test device according to another embodiment of the present application is shown.

As shown in FIG. 4, the cable continuity test apparatus includes a cable communication unit 301, a cable test unit 302, and a fault identification unit 303, and further includes a fault detection unit 304.

The fault detection unit 304 is configured to select one end as a fault input end from a start end and an end end of the faulted cable; sequentially group physical addresses smaller than the fault input address to obtain N groups Y _i , Y _i packets include one or more physical addresses; wherein, N is an integer greater than 1, i of values [1, N]; I is greater than 1, the physical address of each packet are Y _i Y _i-1 is greater than the packet Each physical address; fault detection of a faulty cable is sequentially performed on the faulty output channel T _i , wherein the faulty output channel T _{i is} composed of channels corresponding to all the physical addresses included in the group Y _i .

Optionally, the fault detection unit 304 is specifically configured to compare the physical address corresponding to the start end of the faulty cable with the physical address corresponding to the end end; if the physical address corresponding to the start end of the faulty cable is greater than the end end For the corresponding physical address, the end point is selected as the fault input end; if the physical address corresponding to the start end of the faulty cable is smaller than the physical address corresponding to the end point, the start end is selected as the fault input.

Optionally, the fault detection unit 304 is specifically configured to start a point-to-multipoint continuity test from the fault input end to the fault output channel T _i according to the test configuration corresponding to the faulted cable; according to the point-to-multipoint As a result of the continuity test, it is determined whether the cable corresponding to the faulty input end and the faulty output channel T _i has a wrong connection and short-circuit relationship; if so, it is found out from all the cables corresponding to the faulty output channel T _i The faulty cable has cables that are connected in a short-circuit relationship; if not, further judge whether i is N; if not, start the one-to-multipoint continuity test from the faulty input to the faulty output channel T _{i + 1} ; If yes, identify the faulty cable as an empty point.

Optionally, the fault detection unit 304 is specifically configured to determine the resistance of the circuit under test according to the result of the one-to-multipoint continuity test; if the resistance of the circuit under test is within the resistance criterion range in the test configuration Within, it is determined that the cable corresponding to the faulty input terminal and the faulty output channel T _{i has} a misconnection and short-circuit relationship; if the resistance of the circuit under test is outside the resistance criterion range in the test configuration, then It is determined that all cables corresponding to the faulty input end and the faulty output channel T _i do not have a misconnection and short-circuit relationship.

Optionally, the fault detection unit 304 is specifically configured to divide the fault output channel T _i to obtain two sub-channels: a first sub-channel and a second sub-channel, and each physical address corresponding to the first sub-channel is less than Each physical address corresponding to the second subchannel; starting a point-to-multipoint continuity test from the fault input end to the first subchannel; judging the faulty input based on a result of the point-to-multipoint continuity test Whether the cable corresponding to the first sub-channel has a wrong connection and short-circuit relationship; if so, continue to divide the first sub-channel until the sub-channel contains only one channel, and determine the cable corresponding to the channel There is a faulty short-circuit relationship with the faulty cable; if not, a cable with a faulty short-circuit relationship with the faulty cable is found from all cables corresponding to the second subchannel.

The cable continuity test device provided in the embodiment of the present application performs communication between an input channel of a test device and the starting point according to a physical address corresponding to a starting point and an end point of a cable to be tested, and the The communication between the output channel of the test device and the end point; starting a point-to-point continuity test from the start point to the end point according to the test configuration corresponding to the cable under test; according to the result of the point-to-point continuity test, Determine the on-resistance of the cable under test, and if the on-resistance of the cable under test is outside a preset resistance criterion range, identify the cable under test as a faulty cable. In this way, compared with the traditional point-to-point manual test method, the solution provided in the embodiment of the present application can realize the rapid identification of the faulty cable, greatly save the troubleshooting time for workers on-site operation, and the test accuracy is high.

The embodiments of the cable continuity test device provided in this application can be specifically used to execute the processing procedures of the foregoing method embodiments, and their functions are not described herein again, and reference may be made to the detailed description of the foregoing method embodiments.

Referring to FIG. 5, a schematic diagram of a physical structure of an electronic device according to an embodiment of the present application is shown. As shown in FIG. 5, the electronic device 500 may include a processor 501, a memory 502, and a bus 503. The processor 501 and the memory 502 complete communication with each other through the bus 503. The processor 501 may call a computer program in the memory 502 to execute the methods provided by the foregoing method embodiments, for example, including:

According to the physical addresses corresponding to the start and end ends of the cable under test, the communication between the input channel of the test equipment and the start end, and the communication between the output channel of the test equipment and the end end Start a point-to-point continuity test from the starting point to the end point according to the test configuration corresponding to the cable under test; determine the on-resistance of the cable under test based on the result of the point-to-point continuity test. If the on-resistance of the cable under test is outside the preset resistance criterion, the cable under test is identified as a faulty cable.

In another implementation manner, when the processor 501 executes the computer program, the following method is implemented: The method further includes:

After all the cables under test of the train group are connected to the channels of the test equipment, for each cable under test, according to the respective channels of the start and end ends of the cable under test, and each channel corresponding And record the physical addresses corresponding to the start and end of the cable under test.

In another embodiment, when the processor 501 executes the computer program, the following method is implemented: the communication between an input channel of a test device and the starting point is performed according to the physical address, and the The communication between the output channel of the test equipment and the endpoint includes:

Closing the relay of the channel corresponding to the physical address corresponding to the starting end of the cable to be tested, so that the input channel of the test equipment is in communication with the starting end;

The relay of the channel corresponding to the physical address corresponding to the terminal end of the cable to be tested is closed, so that the output channel of the test equipment is in communication with the terminal end.

In another embodiment, when the processor 501 executes the computer program, the following method is implemented: After the identification of the cable under test as a faulty cable, the method further includes:

Selecting one end from the start and end ends of the faulty cable as the fault input end;

In another implementation manner, when the processor 501 executes the computer program, the following method is implemented: the selecting one end from the start and end ends of the faulty cable as the fault input end includes:

Comparing the physical address corresponding to the starting end of the faulty cable with the physical address corresponding to the end;

If the physical address corresponding to the start end of the faulty cable is greater than the physical address corresponding to the end end, selecting the end end as the fault input end;

If the physical address corresponding to the start end of the faulty cable is smaller than the physical address corresponding to the end end, the start end is selected as the fault input end.

In another implementation manner, when the processor 501 executes the computer program, the following method is implemented: the fault detection of the faulty cable on the faulty output channel T _i includes:

Starting a point-to-multipoint continuity test from the faulty input terminal to the faulty output channel T _i according to the test configuration corresponding to the faulty cable;

Judging whether the cable corresponding to the faulty input end and the faulty output channel T _i has a wrong connection and short circuit relationship according to the result of the one-to-multipoint continuity test;

If yes, find out from all the cables corresponding to the faulty output channel T _i the cables that have a faulty short-circuit relationship with the faulty cable;

If not, further judge whether i is N; if not, start a one-to-multipoint continuity test from the fault input end to the fault output channel T _{i + 1} ; if yes, identify the faulty cable as an empty point .

In another implementation manner, when the processor 501 executes the computer program, the following method is implemented: determining, based on a result of a one-to-multipoint continuity test, that the fault input end corresponds to the fault output channel T _i Whether the cables are misconnected and short-circuited, including:

Determine the resistance of the circuit under test based on the results of the point-to-multipoint continuity test;

If the resistance of the circuit under test is within the range of the resistance criterion in the test configuration, it is determined that the cable corresponding to the faulty input terminal and the faulty output channel T _{i has} a misconnection relationship;

If the resistance of the circuit under test is outside the range of the resistance criterion in the test configuration, it is determined that all cables corresponding to the faulty input terminal and the faulty output channel T _i do not have a misconnection short connection relationship.

In another implementation manner, when the processor 501 executes the computer program, the following method is implemented: the search finds, from all cables corresponding to the fault output channel T _i , that there is a faulty connection with the faulty cable and a short circuit. Relationship cables, including:

Dividing the fault output channel T _i to obtain two sub-channels: a first sub-channel and a second sub-channel, and each physical address corresponding to the first sub-channel is smaller than each physical address corresponding to the second sub-channel;

Start a point-to-multipoint continuity test from the fault input terminal to the first subchannel;

Judging whether the cable corresponding to the faulty input end and the first sub-channel has a wrong connection short circuit relationship according to the result of the one-to-multipoint continuity test;

If yes, continue to divide the first sub-channel until the sub-channel contains only one channel, and determine that the cable corresponding to the channel has a faulty short-circuit relationship with the faulty cable;

If not, find out from all the cables corresponding to the second sub-channel the cables that have the wrong connection and short connection relationship with the faulty cable.

The electronic device provided in the embodiment of the present application has at least the following technical effects: the connection between the input channel of the test device and the starting point is performed according to the physical addresses corresponding to the starting point and the ending point of the cable to be tested, and The communication between the output channel of the test device and the end point; starting the point-to-point continuity test from the start point to the end point according to the test configuration corresponding to the cable under test; As a result, the on-resistance of the cable under test is determined, and if the on-resistance of the cable under test is outside a preset resistance criterion range, the cable under test is identified as a faulty cable. In this way, compared with the traditional point-to-point manual test method, the solution provided in the embodiment of the present application can realize the rapid identification of the faulty cable, greatly save the troubleshooting time for workers on-site operation, and the test accuracy is high.

An embodiment of the present application discloses a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, The computer can execute the methods provided by the foregoing method embodiments, for example, including:

An embodiment of the present application provides a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores a computer program, and the computer program causes the computer to execute the methods provided by the foregoing method embodiments, for example, include:

In addition, the logic instructions in the memory may be implemented in the form of a software functional unit and sold or used as an independent product, and may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes .

The device embodiments described above are only schematic, and the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located One place, or it can be distributed across multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the objective of the solution of this embodiment. Those of ordinary skill in the art can understand and implement without creative labor.

Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be implemented by means of software plus a necessary universal hardware platform, and of course, they can also be implemented by hardware. Based on such an understanding, the above-mentioned technical solution essentially or part that contributes to the existing technology can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic A disc, an optical disc, and the like include a number of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments or certain parts of the embodiments.

Finally, it should be noted that the above embodiments are only used to describe the technical solution of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still Modifications to the technical solutions described in the foregoing embodiments, or equivalent replacements of some of the technical features thereof; and these modifications or replacements do not depart the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A cable continuity test method includes:

According to the physical addresses corresponding to the start and end ends of the cable under test, the communication between the input channel of the test equipment and the start end, and the communication between the output channel of the test equipment and the end end ;

Starting a point-to-point continuity test from the start point to the end point according to a test configuration corresponding to the cable to be tested;

Determine the on-resistance of the cable under test according to the result of the point-to-point continuity test, and identify the cable under test if the on-resistance of the cable under test is outside a preset resistance criterion range Is the faulty cable.
The method according to claim 1, further comprising:

After all the cables under test of the train group are connected to the channels of the test equipment, for each cable under test, according to the respective channels of the start and end ends of the cable under test, and each channel corresponding And record the physical addresses corresponding to the start and end of the cable under test.
The method according to claim 1, characterized in that, according to the physical address, the communication between an input channel of a test device and the starting point, and an output channel of the test device and the end point are performed. Connectivity, including:

Closing the relay of the channel corresponding to the physical address corresponding to the starting end of the cable to be tested, so that the input channel of the test equipment is in communication with the starting end;

The relay of the channel corresponding to the physical address corresponding to the terminal end of the cable to be tested is closed, so that the output channel of the test equipment is in communication with the terminal end.
The method according to claim 1, wherein after the identifying the cable under test as a faulty cable, the method further comprises:

Selecting one end from the start and end ends of the faulty cable as the fault input end;

Less than the fault of the physical address to the address input packet sequence, to obtain N packets Y i, Y i packet includes one or more physical addresses; wherein, N is an integer greater than 1, the value I [1, N ]; i is greater than 1, the physical address of each packet Y i Y i are greater than 1-packet for each physical addresses;

The faulty cable fault detection is performed on the faulty output channel T i in sequence, wherein the faulty output channel T i is composed of channels corresponding to all the physical addresses included in the group Y i .
The method according to claim 4, wherein the selecting one of the start and end ends of the faulty cable as the fault input terminal comprises:

Comparing the physical address corresponding to the starting end of the faulty cable with the physical address corresponding to the end;

If the physical address corresponding to the start end of the faulty cable is greater than the physical address corresponding to the end end, selecting the end end as the fault input end;

If the physical address corresponding to the start end of the faulty cable is smaller than the physical address corresponding to the end end, the start end is selected as the fault input end.
The method according to claim 4, wherein the fault detection of the faulty cable on the faulty output channel T i comprises:

Starting a point-to-multipoint continuity test from the faulty input terminal to the faulty output channel T i according to the test configuration corresponding to the faulty cable;

Judging whether the cable corresponding to the faulty input end and the faulty output channel T i has a wrong connection and short circuit relationship according to the result of the one-to-multipoint continuity test;

If yes, find out from all the cables corresponding to the faulty output channel T i the cables that have a faulty short-circuit relationship with the faulty cable;

If not, further judge whether i is N; if not, start a one-to-multipoint continuity test from the fault input end to the fault output channel T i + 1 ; if yes, identify the faulty cable as an empty point .
The method according to claim 6, characterized in that, according to a result of the one-to-multipoint continuity test, determining whether the cable corresponding to the faulty input end and the faulty output channel T i has a misconnection short connection relationship, include:

Determine the resistance of the circuit under test based on the results of the point-to-multipoint continuity test;

If the resistance of the circuit under test is within the range of the resistance criterion in the test configuration, it is determined that the cable corresponding to the faulty input terminal and the faulty output channel T i has a misconnection relationship;

If the resistance of the circuit under test is outside the range of the resistance criterion in the test configuration, it is determined that all cables corresponding to the faulty input terminal and the faulty output channel T i do not have a misconnection short connection relationship.
The method according to claim 7, wherein the finding out, from all the cables corresponding to the faulty output channel T i, a cable having a misconnection and short-circuit relationship with the faulty cable comprises:

Dividing the fault output channel T i to obtain two sub-channels: a first sub-channel and a second sub-channel, and each physical address corresponding to the first sub-channel is smaller than each physical address corresponding to the second sub-channel;

Start a point-to-multipoint continuity test from the fault input terminal to the first subchannel;

Judging whether the cable corresponding to the faulty input end and the first sub-channel has a wrong connection short circuit relationship according to the result of the one-to-multipoint continuity test;

If yes, continue to divide the first sub-channel until the sub-channel contains only one channel, and determine that the cable corresponding to the channel has a faulty short-circuit relationship with the faulty cable;

If not, find out from all the cables corresponding to the second sub-channel the cables that have the wrong connection and short connection relationship with the faulty cable.
A cable continuity test device, comprising:

The cable connection unit is configured to perform communication between an input channel of the test device and the start point and an output channel of the test device and the physical address corresponding to the start and end ends of the cable to be tested. Communication between the end points;

A cable test unit configured to start a point-to-point continuity test from the start point to the end point according to a test configuration corresponding to the cable to be tested;

The fault detection unit is configured to determine the on-resistance of the cable under test according to the result of the point-to-point continuity test. If the on-resistance of the cable under test is outside a preset resistance criterion range, Then, the cable under test is identified as a faulty cable.
A test device, comprising: the cable continuity test device according to claim 9, an excitation source, a signal collector, and a plurality of switch matrices;

Wherein, the cable continuity test device is connected to the excitation source, the signal collector, and the switch matrix; the switch matrix is connected to the excitation source and the signal collector; the switch matrix There are multiple channels, and each channel is provided with a corresponding relay.