CN108152650A - The automatic line inspection system of multicore cable - Google Patents

Abstract

The present invention provides a kind of automatic line inspection systems of multicore cable, and A ends include：Power-supply system, the power-supply system include power end fixed value resistance；Sequentially connected display, master controller, relay group and adapter system, the display are connected with power-supply system described in master controller, and the adapter system at the A ends is connect with one end of the tested multicore cable；B ends include：Sequentially connected adapter system and testing element array, the adapter system at the B ends are connect with the other end of the tested multicore cable.Preparation joint multicore cable wiring condition can be verified using this system, it excludes wrong line situation in connector and ensures that cable is correct, the preparation joint multicore cable line inspection can accurately and fast be carried out, solve the problems, such as high-volume pre-fabricated electric cables installation before the line inspection the problem of and pre-fabricated electric cables internal core it is sightless, pass through inserting mode connecting cable, fast wiring, one-touch automatic measurement simultaneously generates test report, easy to use.

Description

Multi-core cable automatic checking system

technical field

The invention relates to an automatic line checking system for multi-core cables.

Background technique

In recent years, the number of smart substations has been increasing day by day. The secondary cables of smart substations use prefabricated connector cables, and the related equipment connected to the cables are equipped with sockets, which can be directly inserted during on-site installation, and the prefabricated connectors and sockets are directional. Misplugging is avoided, and the cable installation process becomes simple and convenient. However, the internal wiring of the prefabricated cable still needs to be checked to ensure that each core is wired correctly, no open circuit, short circuit, or wrong wiring can occur, and the internal cores of the prefabricated connector cable are all connected to the plug, and the cable core is not visible. There are many types of plugs and the number of wire cores is uncertain. These situations have added a lot of difficulties to the secondary cable inspection of smart substations.

Contents of the invention

The purpose of the present invention is to provide a multi-core cable automatic line checking system, which can solve the problem of difficult line checking of secondary cables in intelligent substations.

In order to solve the above-mentioned problems, the present invention provides a multi-core cable automatic line checking system, including A terminal and B terminal respectively connected to the two ends of the multi-core cable to be tested, wherein,

The A terminal includes: a power supply system, the power supply system includes a constant value resistor at the power supply end; a display, a main controller, a relay group and a joint system connected in sequence, the display is connected to the power supply system of the main controller, and the The connector system at the A end is connected to one end of the multi-core cable under test;

The B end includes: a sequentially connected joint system and a test element array, and the joint system at the B end is connected to the other end of the multi-core cable to be tested.

Further, in the above system, the power supply system includes an external power supply and a rechargeable battery.

Further, in the above system, the main controller is composed of a single-chip microcomputer or PLC or intelligent terminal equipment.

Further, in the above system, the test element array includes resistors and diodes with different resistance values, wherein a resistor and a diode form a test element unit, and the number of cores of the multi-core cable to be tested determines the number of test elements in the array. The number of component units used, the number of test component units is the number of cores of the multi-core cable under test minus one.

Further, in the above system, the main controller works according to the sequence of signal collection, signal processing and report generation.

Further, in the above-mentioned system, the main controller is used to send a test signal to control the relay group to turn on/off the contacts in order to generate electrical signals, and the electrical signals are passed through the joint system at the A end, and are received Measuring the multi-core cable, the joint system at the B end is transmitted to the test element array;

The test element array is used to process the electrical signal to generate a feedback signal, and the feedback signal is fed back to the main controller via the B-end connector system, the multi-core cable under test, and the A-end connector system;

The main controller is further configured to analyze the feedback signal to determine the abnormality of the multi-core cable line, and the result is displayed in the display in the form of a report.

Further, in the above system, when the signal is collected, the main controller sends a control signal to connect different circuits by turning on and off different relays in the relay group, wherein the power supply system, the The fixed-value resistor at the power supply end, the two tested wire cores in the tested multi-core cable, and the test element unit form a test circuit, and the voltage obtained from the fixed-valued resistor is included in the system as a system feedback signal. The main controller makes forward and reverse measurements on the two tested wire cores, numbers and records all the feedback signals.

Further, in the above system, the connector system at the A-end and the connector system at the B-end respectively include a plurality of cable sockets matching prefabricated connectors of different multi-core cables to be tested.

Further, in the above system, when the signal is processed and the report is generated, the main controller compares the collected feedback signal with the correct wiring value preset in the main controller to obtain the real wiring result; and According to the different cable sockets used, the actual wiring results generate corresponding result reports and display them on the display in the form of diagrams or text descriptions.

Compared with the prior art, the present invention includes through the A terminal: a power supply system, the power supply system includes a constant value resistor at the power supply end; a display, a main controller, a relay group and a joint system connected in sequence, the display and the main controller The power supply system is connected, and the joint system of the A end is connected to one end of the multi-core cable under test; the B end includes: a joint system and a test element array connected in sequence, and the joint system of the B end is connected to the tested multi-core cable. Connect the other end of the core cable. This system can be used to verify the wiring of multi-core cables with prefabricated connectors, eliminate the wrong wires in the connectors to ensure correct cable wiring, and accurately and quickly check the wiring of multi-core cables with prefabricated connectors. The problem of checking wires and the problem that the inner core of the prefabricated cable is not visible, the cable is connected by plugging, the wiring is fast, one-button automatic measurement and test report generation, easy to use.

Description of drawings

Fig. 1 is the block diagram of the multi-core cable automatic line checking system of an embodiment of the present invention;

Fig. 2 is a schematic diagram of the hardware structure of the A end of the multi-core cable automatic line checking system according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the hardware structure of the multi-core cable automatic line checking system B end of an embodiment of the present invention;

Fig. 4 is a schematic diagram of the work flow of the multi-core cable automatic line checking system according to an embodiment of the present invention;

Fig. 5 is a signal acquisition circuit diagram of a multi-core cable automatic line checking system according to an embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, the present invention provides a kind of multi-core cable automatic checking system, comprises the A end and B end that are respectively connected with the two ends of the multi-core cable under test, wherein,

As shown in Figures 1-2, the A terminal includes: a power supply system, the power supply system includes a constant value resistor at the power supply end; a display, a main controller, a relay group and a joint system connected in sequence, the display and the main controller The power supply system is connected, and the connector system at the A end is connected to one end of the multi-core cable under test;

As shown in Figures 1 and 3, the B-end includes: a joint system and a test element array connected in sequence, and the joint system at the B-end is connected to the other end of the multi-core cable to be tested.

Here, the multi-core cable automatic checking system consists of two parts, A and B, which are respectively connected to the two ends of the multi-core cable to be tested when in use, and the A end is composed of the main controller, relay group, joint system, display and power supply system. ; The B end is composed of a joint system and an array of test elements.

This system can be used to verify the wiring of multi-core cables with prefabricated connectors, eliminate the wrong wires in the connectors to ensure correct cable wiring, and accurately and quickly check the wiring of multi-core cables with prefabricated connectors. The problem of checking wires and the problem that the inner core of the prefabricated cable is not visible, the cable is connected by plugging, the wiring is fast, one-button automatic measurement and test report generation, easy to use.

In an embodiment of the multi-core cable automatic line checking system of the present invention, when the multi-core cable automatic line checking system is working, the two ends of A and B need to be connected to the two ends of the multi-core cable under test, and the main controller is used for A test signal is sent to control the relay group to turn on/off the contacts in order to generate electrical signals, and the electrical signals are sequentially transmitted to the test element array through the joint system at the A end, the multi-core cable under test, and the joint system at the B end ;

The test element array is used to process the electrical signal to generate a feedback signal, and the feedback signal is fed back to the main controller via the B-end connector system, the multi-core cable under test, and the A-end connector system;

The main controller is further configured to analyze the feedback signal to determine the abnormality of the multi-core cable line, and the result is displayed in the display in the form of a report.

Here, when the system is in use, connect the two ends of A and B to the two ends of the multi-core cable to be tested. The measurement can be one-button automatic measurement. Press the button and the test will run automatically. After the test is completed, a test report will be generated and displayed on the display. on display.

The multi-core cable automatic checking system of the present invention can monitor all cable connection abnormalities including open circuit, short circuit and miswire. , Debugging occasions, can significantly improve line checking efficiency and save labor costs.

In an embodiment of the multi-core cable automatic checking system of the present invention, the power supply system includes an external power supply and a rechargeable battery.

Here, the A terminal contains a power supply system, and the B terminal is a passive terminal. The power supply system contains a rechargeable battery. The multi-core cable automatic line checking system has two working modes, that is, using the internal battery for power supply and using an external power supply for power supply. .

In an embodiment of the multi-core cable automatic line checking system of the present invention, as shown in Figure 3, the test element array includes resistors and diodes with different resistance values, wherein a resistor and a diode form a test element unit, which is composed of The number of cores of the measured multi-core cable determines the number of test element units used in the test element array, and the number of test element units is the number of cores of the multi-core cable to be tested minus one.

In an embodiment of the multi-core cable automatic checking system of the present invention, the main controller is composed of a single-chip microcomputer or PLC or an intelligent terminal device.

In an embodiment of the multi-core cable automatic checking system of the present invention, the main controller works in sequence of signal collection, signal processing and report generation.

In an embodiment of the multi-core cable automatic line checking system of the present invention, when the signal is collected, the main controller sends a control signal to connect different circuits by turning on and off different relays in the relay group, wherein , the power supply system, the fixed-value resistor at the power supply end, the two tested wire cores in the tested multi-core cable, and the test element unit form a test circuit, and the voltage divided by the fixed-valued resistor is used as a system feedback signal Included in the system, the main controller performs two forward and reverse measurements on the two measured wire cores, numbers and records all feedback signals, and completes the signal collection work.

In an embodiment of the multi-core cable automatic checking system of the present invention, the joint system at the A end and the joint system at the B end respectively include a plurality of cable sockets matching with prefabricated joints of different tested multi-core cables.

Here, the joint system contained in both ends of A and B can be connected to different prefabricated joints of multi-core cables by replacing different cable sockets. The system automatically recognizes the number of cores in the connected sockets and completes the line inspection. The core number is provided by the directionality of the cable connector itself, and the test results are indicated in the test report by means of diagrams or text descriptions.

When in use, select different sockets according to the prefabricated connectors of the cables and install them on the plug systems at both ends of A and B, insert the prefabricated cable plugs of the multi-core cable under test into the sockets at both ends of A and B, start the system power supply and enter the line inspection state, press the button to start checking the line, the main controller sends a test signal to control the relay group to turn on/off the contacts in order to connect different test circuits, and the electrical signal passes through the A-end connector system, the multi-core cable under test, The B-end connector system is transmitted to the test element array, and the test element array processes and feeds back the signal. The feedback signal is fed back to the main controller through the B-end connector system, the multi-core cable under test, and the A-end connector system. After the analysis, the abnormality of the multi-core cable line is determined, and the result is displayed in the display in the form of a report. The multi-core cable automatic line checking system of the present invention can monitor all cable connection abnormalities including open circuit, short circuit and wrong line.

In an embodiment of the multi-core cable automatic line checking system of the present invention, when the signal is processed and the report is generated, the main controller compares the collected feedback signal with the preset correct wiring value in the main controller to obtain According to the different cable sockets used, the real wiring results will generate corresponding result reports and display them on the display in the form of diagrams or text descriptions.

Example 1:

As shown in Figure 4, taking the four-core prefabricated joint cable commonly used in the secondary side of the substation as an example to illustrate the working process of a multi-core cable automatic line checking system of the present invention: first, select the required cable from various prefabricated cable sockets provided by the joint system There are two corresponding sockets in the form of four-core cable connectors for line checking, which are respectively installed on the interfaces at the two ends of the system A and B. First, plug one end of the cable into the socket at the B end, and then plug the other end of the cable into the socket at the A end. Complete the connection between the cable and the line checking system; when the substation is installed, sometimes there is no power supply on site, the system can use the internal power supply to power the system, turn on the power switch of the A terminal, and the system will initialize and automatically detect the current situation. The cable socket connected to the A terminal is a 4-core socket, and the 4-core cable inspection program is called to start the inspection; press the A-end start button to start the inspection, and the system will number the 4 cores of the cable according to the core numbers in the prefabricated connector. 1, 2, 3, 4. At this time, there are 8 connectors at both ends of A and B. Correspondingly, the corresponding 4 connectors on the A-end socket are named 1A, 2A, 3A, 4A, and the corresponding 4 connectors on the B-end socket The connectors are named 1B, 2B, 3B, and 4B, as shown in Figure 5. The main control PLC sends a control signal to supply power to the relay coils of K3 and K6. At this time, the corresponding contacts of K3 and K6 are closed, and the connection is made by the power supply and the 10KΩ fixed-value resistor. , No. 1 wire core, test element unit 1 and No. 2 wire core, as shown in Figure 5, the curve with arrows in the figure marks the current flow direction of the positive signal acquisition circuit between No. 1 and No. 2 wire cores, and the system collects terminal A The voltage obtained by the internal 10KΩ fixed-value resistor is included in the register of the main controller as the acquisition signal; after the first data record is completed, the main control PLC sends a signal to turn off the K3 and K6 relays and switch on the K1, K3 and K6 relays, then connect Through the reverse acquisition circuit, the collected signal is counted into the register of the main controller. At this time, the signal acquisition work between the cable cores 1 and 2 is completed; use the same method to sequentially collect the cores 1 and 3, and the cores 1 and 4 No. 2 and No. 3 cores, No. 2 and No. 4 wire cores, and the voltage signals between No. 3 and No. 4 wire cores are included in the corresponding registers of the main controller; The data is matched, and the wiring situation is judged in the order of open circuit inspection→short circuit inspection→wrong wire inspection. The judgment is based on the following: Take the data between the cores of No. , Reverse two signal acquisitions, the forward signal should be the analog voltage 12*10/(10+10)=6v, the reverse signal is the analog voltage 0v because there is a diode in the test element unit, first judge the open circuit .

1) Open circuit check: If there is an open circuit between the No. 1 and No. 2 cores, the acquisition circuit cannot be connected, and the data collected in the forward and reverse directions should be 0v. If the No. 1 line is disconnected, all related to No. 1 line The acquisition circuit cannot collect voltage signals. At this time, the forward and reverse acquisition signals of No. 1 and No. 2 wire cores, No. 1 and No. 3 wire cores, and No. 1 and No. 4 wire cores should be 0v, so it is judged that No. 1 wire There is an open circuit at the core connector; if line 2 is open, all the acquisition circuits related to line 2 cannot collect voltage signals. At this time, cores 1 and 2, cores 2 and 3, and lines 2 and 4 Both the forward and reverse acquisition signals of the core should be 0v, so it is judged that there is an open circuit at the connector of the No. 2 core, and if there is an open circuit on the No.

2) Short circuit inspection: If there is a short circuit on line 1 and line 2, the test component unit cannot be connected to the acquisition circuit, and the resistors and diodes in the acquisition unit cannot work. The received voltage should be 12v, and the forward and reverse collected voltages should be equal and both 12v, so it can be judged that there is a short circuit between the cores of line 1 and line 2, and it will be included in the line inspection report;

3) If there is no short circuit or open circuit between the 1st and 2nd line cores, enter the wrong line inspection, and match the voltage signal collected in the forward direction with the correct collected voltage between the 1st and 2nd line cores, which is 6v. If the voltage values are equal Then it is determined that the wiring is correct, and the wiring between line 1 and line 2 is correctly included in the line inspection report. If it is not equal to 6v, it is connected with line cores 1 and 3, line cores 1 and 4, and line cores 2 and 3 in turn. , No. 2, No. 4 wire cores, No. 3, No. 4 wire cores correctly collect voltage values for matching. At this time, if the matching result is that the collected voltage values of No. 1 and No. 2 cores are consistent with the correct collected voltage values between No. 1 and No. 4 wire cores Then it is determined that the No. 2 core and the No. 4 core are miswired, and the result is included in the line inspection report. If they do not match, then judge whether the value is 0v. If it is 0v, reversely collect the voltage value between the No. 1 and No. 2 cores. Call out the standard collection voltage between it and No. 1 and No. 2 wire cores, No. 1 and No. 3 wire cores, No. 1 and No. If the reverse collected voltage value between No. 1 and No. 2 cores is consistent with the correct collected voltage value between No. 1 and No. 2 cores, then it is determined that No. 1 and No. 2 cores are miswired, and No. 2 and No. 1 If the No. 1 and No. 2 cores are miswired, it is determined that the No. 1 and No. 2 cores are reversely connected (that is, the 1A and 2B terminals are connected together, and the 2A and 1B terminals are connected together). The results are included in the line investigation report.

At this point, the judgment of the wiring situation of No. 1 and No. 2 wire cores is completed and the next step is to judge the wiring situation between No. 1 and No. 3 wire cores; and so on. , No. 2 and No. 4 line cores, and No. 3 and No. 4 line cores. After all the wiring conditions between the line cores are judged, the line inspection report is sorted out and displayed on the display to complete the line inspection. The wire checking report is divided into three parts, namely open circuit indication, short circuit indication and wrong wire indication. If the multi-core cable has a broken wire of No. 1 core, and wrong connection of No. 2 and No. 4 cores, the report will prompt as : "Open circuit: No. 1 wire core; Short circuit: None; Wrong line: 2A→4B, 4A→2B".

The wiring of the cable and the line checking system adopts the direct plug-in connection of the socket, and it is equipped with a socket suitable for various prefabricated connector cables, which does not require complicated wiring operations, and the prefabricated connector cable itself is directional when connected to the socket, which avoids the need for checking. In the case of cable misconnection during the wiring process, the judgment of the wiring of all cores after the cable is connected to the system can be completed within 5 seconds, and can be operated by a single person, abandoning the original two-person method of checking wires through walkie-talkies and multimeters, and It is not necessary for line checking personnel to have professional knowledge, which greatly improves line checking efficiency and avoids human errors.

Example 2:

Taking the five-core prefabricated joint cable as an example to illustrate the working process of the multi-core cable automatic inspection system of the present invention: firstly, select two sockets corresponding to the five-core cable joint form that need to be checked from the various prefabricated cable sockets provided by the joint system. One, respectively installed on the interface at both ends of the system A, B, first plug one end of the cable into the B-end socket, and then plug the other end of the cable into the A-end socket to complete the connection between the cable and the line checking system; Sometimes there is no power supply on site during installation. The system can be powered by internal power supply. If there is AC 220v power supply, connect the line checking system to the power supply, turn on the power switch of terminal A to turn on the system power supply, and the system will initialize and automatically detect. At this time, the cable socket connected to the A terminal is a 5-core socket, and the 5-core cable inspection program is called to start the inspection; press the A-end start button to start the inspection, and the system will use the 5 cores of the cable according to the core numbers in the prefabricated connector. The numbers are 1, 2, 3, 4, and 5. At this time, there are 10 connectors at both ends of A and B. Correspondingly, the corresponding 4 connectors on the A-end socket are named 1A, 2A, 3A, 4A, 5A, and B-end The corresponding four connectors on the socket are named 1B, 2B, 3B, 4B, and 5B, and their structure is basically the same as in Example 1. The main control PLC sends a control signal to supply power to the relay coils of K3 and K6. At this time, the corresponding contacts of K3 and K6 Point suction, connect the signal acquisition circuit composed of power supply, 10KΩ fixed value resistor, No. 1 wire core, test element unit 1 and No. 2 wire core. The signal is counted into the main controller register; after the first data record is completed, the main control PLC sends a signal to turn off the K3, K6 relays and switch on the K1, K3, K6 relays, and connects the reverse acquisition circuit, and the collected signals are counted. Enter the register of the main controller, and complete the signal acquisition work between the 1st and 2nd cable cores at this time; use the same method to sequentially collect the 1st and 3rd cores, the 1st and 4th cores, the 1st and 5th cores, and the 2nd cores. , No. 3 wire core, No. 2, No. 4 wire core, No. 2, No. 5 wire core, No. 3, No. 4 wire core, No. 3, No. In the controller register; match the measured signal with the data in the main control chip, and judge the wiring situation in the order of open circuit inspection→short circuit inspection→wrong wire inspection. For example, if the wiring is normal, the main control chip collects forward and reverse signals twice according to the ratio of resistance voltage division. There is a diode in it, so it is an analog voltage of 0v, first judge the open circuit situation.

1) Open circuit check: If there is an open circuit between the No. 1 and No. 2 cores, the acquisition circuit cannot be connected, and the data collected in the forward and reverse directions should be 0v. If the No. 1 line is disconnected, all related to No. 1 line The acquisition circuit cannot collect the voltage signal. At this time, the forward and reverse acquisition signals between No. 1 and No. 2 wire cores, No. 1 and No. 3 wire cores, No. 0v, so it is judged that there is an open circuit at the connector of the No. 1 core; if the No. 2 line is disconnected, all the acquisition circuits related to the No. Line cores, No. 2 and No. 4 cores The forward and reverse acquisition signals of No. 2 and No. 5 cores should be 0v, so it is judged that there is an open circuit at the joint of the No. 2 core. If there is an open circuit on the No. 1 and No. 2 lines will be included in the tracking report

2) Short circuit inspection: If there is a short circuit on line 1 and line 2, the test component unit cannot be connected to the acquisition circuit, and the resistors and diodes in the acquisition unit cannot work. The received voltage should be 12v, and the forward and reverse collected voltages should be equal and both 12v, so it can be judged that there is a short circuit between the cores of line 1 and line 2, and it will be included in the line inspection report;

3) If there is no short circuit or open circuit between the 1st and 2nd line cores, enter the wrong line inspection, and match the voltage signal collected in the forward direction with the correct collected voltage between the 1st and 2nd line cores, which is 6v. If the voltage values are equal Then it is determined that the wiring is correct, and the wiring between line 1 and line 2 is correctly included in the line inspection report. If it is not equal to 6v, it is connected with line cores 1 and 3, line cores 1 and 4, and line cores 1 and 5 in turn. , Line cores 2 and 3, Line cores 2 and 4, Line cores 2 and 5, Line cores 3 and 4, Line cores 3 and 5, Line cores 4 and 5 correctly collect voltage values for matching, At this time, if the matching result is that the collected voltage values of No. 1 and No. 2 cores are consistent with the correct collected voltage values between No. 3 and No. 4 cores, then it is determined that No. 1 and No. 3 cores are miswired, and No. 2 and No. The core is wrong, and the result will be included in the line inspection report. If they do not match, then judge whether the value is 0v, if it is 0v, call out the reversely collected voltage value between the cores of line 1 and line 2 and compare it with line 1 and line 2. Core, No. 1, No. 3 wire core, No. 1, No. 4 wire core, No. 1, No. 5 wire core, No. 2, No. 3 wire core, No. 2, No. 4 wire core, No. 2, No. 5 wire core, No. 3, No. 4 wire core , No. 3, No. 5 line cores, No. 4, No. 5 line cores, the standard collection voltage value is matched, if the reverse collection voltage value between No. 1 and No. 2 line cores is consistent with the correct collection voltage value between No. 1 and No. 2 line cores No. 1 core and No. 2 core are miswired, and No. 2 core and No. 1 core are miswired, and the results are included in the line inspection report.

At this point, the judgment of the wiring status of the 1st and 2nd wire cores is completed and the next step is to judge the wiring status of the 1st and 3rd wire cores. By analogy, wire cores 1 and 3, wire cores 1 and 4, wire cores 1 and 5, wire cores 2 and 3, wire cores 2 and 4, wire cores 2 and 5, and wires 3 and 4 Core, No. 3 and No. 5 cores, and No. 4 and No. 5 cores are all judged. After the line inspection report is completed, it will be displayed on the display to complete the line inspection. The wire checking report is divided into three parts: open circuit indication, short circuit indication and wrong wire indication. For example, if the wire core 1 of the multi-core cable is disconnected, the wire core 2 and the wire core 4 are wrongly connected to the wire core 3 and the wire core 5. If there is a short circuit, the report prompts: "Open circuit: No. 1 wire core; Short circuit: 3→5; Wrong wire: 2A→4B, 4A→2B".

The wiring of the cable and the line checking system adopts the direct plug-in connection of the socket, and it is equipped with a socket suitable for various prefabricated connector cables, which does not require complicated wiring operations, and the prefabricated connector cable itself is directional when connected to the socket, which avoids the need for checking. In the case of cable misconnection during the wiring process, the judgment of the wiring of all cores after the cable is connected to the system can be completed within 5 seconds, and can be operated by a single person, abandoning the original two-person method of checking wires through walkie-talkies and multimeters, and It is not necessary for line checking personnel to have professional knowledge, which greatly improves line checking efficiency and avoids human errors.

Example 3:

Taking the six-core prefabricated joint cable as an example to illustrate the working process of the multi-core cable automatic checking system of the present invention: firstly, select two sockets corresponding to the six-core cable joint form that need to be checked from the various prefabricated cable sockets provided by the joint system. One, respectively installed on the interface at both ends of the system A, B, first plug one end of the cable into the B-end socket, and then plug the other end of the cable into the A-end socket to complete the connection between the cable and the line checking system; Sometimes there is no power supply on site during installation. The system can be powered by internal power supply. If there is AC 220v power supply, connect the line checking system to the power supply, turn on the power switch of terminal A to turn on the system power supply, and the system will initialize and automatically detect. At this time, the cable socket connected to the A terminal is a 6-core socket, and the 6-core cable inspection program is called to start the inspection; press the A-end start button to start the inspection, and the system will use the 5 cores of the cable according to the core numbers in the prefabricated connector. The numbers are 1, 2, 3, 4, 5, 6. At this time, there are 12 connectors at both ends of A and B. Correspondingly, the corresponding 4 connectors on the A-end socket are named 1A, 2A, 3A, 4A, 5A, 6A, the corresponding four connectors on the B-end socket are named 1B, 2B, 3B, 4B, 5B, and 6B. When the corresponding K3 and K6 contacts are closed, the signal acquisition circuit composed of power supply, 10KΩ fixed-value resistor, No. 1 wire core, test element unit 1 and No. 2 wire core is connected. The divided voltage is counted into the main controller register as the acquisition signal; after the first data record is completed, the main control PLC sends a signal to turn off the K3 and K6 relays and switch on the K1, K3 and K6 relays, and turn on the reverse acquisition circuit. Count the collected signals into the register of the main controller. At this time, the signal collection work between the cable cores 1 and 2 is completed; use the same method to sequentially collect the cores 1 and 3, the cores 1 and 4, and the cores 1 and 2. No. 5 wire core, No. 1, No. 6 wire core, No. 2, No. 3 wire core, No. 2, No. 4 wire core, No. 2, No. 5 wire core, No. 2, No. 6 wire core, No. 3, No. Line core, No. 3, No. 6 line core, No. 4, No. 5 line core, No. 4, No. 6 line core, and the voltage signal between No. 5 and No. The signal is matched with the data in the main control chip, and the wiring situation is judged in the order of open circuit inspection→short circuit inspection→wrong wire inspection. The judgment basis is as follows: Take the data between the cores of No. The proportional main control chip collects forward and reverse signals twice, the forward signal should be an analog voltage 12*10/(10+10)=6v, and the reverse signal is an analog voltage because there is a diode in the test element unit 0v, first judge the open circuit situation.

1) Open circuit check: If there is an open circuit between the No. 1 and No. 2 cores, the acquisition circuit cannot be connected, and the data collected in the forward and reverse directions should be 0v. If the No. 1 line is disconnected, all related to No. 1 line The acquisition circuit cannot collect the voltage signal. At this time, the forward and reverse directions between No. 1 and No. 2 wire cores, No. 1 and No. 3 wire cores, No. 1 and No. All the acquisition signals in both directions should be 0v, so it is judged that there is an open circuit at the core connector of line 1; if line 2 is open, all the acquisition circuits related to line 2 cannot collect voltage signals. core, No. 2 and No. 3 cores, No. 2 and No. 4 cores, No. 2 and No. 5 cores, and No. 2 and No. 6 cores. If there is a circuit breaker, if there is a circuit breaker on Line 1 and Line 2, it will be included in the line inspection report

2) Short circuit inspection: If there is a short circuit on line 1 and line 2, the test component unit cannot be connected to the acquisition circuit, and the resistors and diodes in the acquisition unit cannot work. The received voltage should be 12v, and the forward and reverse collected voltages should be equal and both 12v, so it can be judged that there is a short circuit between the cores of line 1 and line 2, and it will be included in the line inspection report;

3) If there is no short circuit or open circuit between the 1st and 2nd line cores, enter the wrong line inspection, and match the voltage signal collected in the forward direction with the correct collected voltage between the 1st and 2nd line cores, which is 6v. If the voltage values are equal Then it is determined that the wiring is correct, and the wiring between line 1 and line 2 is correctly included in the line inspection report. If it is not equal to 6v, it is connected with line cores 1 and 3, line cores 1 and 4, and line cores 1 and 5 in turn. , No. 1, No. 6 wire core, No. 2, No. 3 wire core, No. 2, No. 4 wire core 2, No. 5 wire core, No. 2, No. 6 wire core, No. 3, No. 4 wire core, No. , No. 6 wire core, No. 4, No. 5 wire core, No. 4, No. 6 wire core, and No. 3. If the correctly collected voltage values between the No. 6 wire cores are consistent, it is determined that the No. 1 wire core and No. 3 wire core are miswired, and the No. 2 wire core and No. 6 wire core are miswired. If it matches, it is judged whether its value is 0v, if it is 0v, the reversely collected voltage value between No. 1 and No. 2 cores is called out, and it is compared with No. 1, No. 5 core, 1, 6 core, 2, 3 core, 2, 4 core 2, 5 core, 2, 6 core, 3, 4 core, 3, No. 5 wire core, No. 3, No. 6 wire core, No. 4, No. 5 wire core, No. 4, No. 6 wire core, standard collection voltage value between No. If the collected voltage value is consistent with the correct collected voltage value between No. 3 and No. 4 cores, then it is determined that No. 1 and No. 4 cores are miswired, and No. 2 and No. 3 cores are miswired. The results will be included in the line inspection report. .

At this point, the judgment of the wiring status of the 1st and 2nd wire cores is completed and the next step is to judge the wiring status of the 1st and 3rd wire cores. By analogy, wire cores 1 and 3, wire cores 1 and 4, wire cores 1 and 5, wire cores 2 and 3, wire cores 2 and 4, wire cores 2 and 5, and wires 3 and 4 Core, No. 3 and No. 5 cores, and No. 4 and No. 5 cores are all judged. After the line inspection report is completed, it will be displayed on the display to complete the line inspection. The wire checking report is divided into three parts: open circuit indication, short circuit indication and wrong wire indication. For example, if the wire core 1 of the multi-core cable is disconnected, the wire core 2 and the wire core 4 are wrongly connected to the wire core 3 and the wire core 5. If the short-circuit of the No. 6 core is normal, the report prompts: "Open circuit: No. 1 core; Short circuit: 3→5; Wrong wire: 2A→4B, 4A→2B".

The wiring of the cable and the line checking system adopts the direct plug-in connection of the socket, and it is equipped with a socket suitable for various prefabricated connector cables, which does not require complicated wiring operations, and the prefabricated connector cable itself is directional when connected to the socket, which avoids the need for checking. In the case of cable misconnection during the wiring process, the judgment of the wiring of all cores after the cable is connected to the system can be completed within 5 seconds, and can be operated by a single person, abandoning the original two-person method of checking wires through walkie-talkies and multimeters, and It is not necessary for line checking personnel to have professional knowledge, which greatly improves line checking efficiency and avoids human errors.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

Professionals can further realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the possible For interchangeability, in the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Obviously, those skilled in the art can make various changes and modifications to the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (9)

1. a kind of automatic line inspection system of multicore cable, which is characterized in that including the A ends being connect respectively with tested multicore cable both ends With B ends, wherein,

The A ends include：Power-supply system, the power-supply system include power end fixed value resistance；Sequentially connected display, master control Device processed, relay group and adapter system, the display are connected with power-supply system described in master controller, the connector system at the A ends System is connect with one end of the tested multicore cable；

The B ends include：Sequentially connected adapter system and testing element array, the adapter system at the B ends are tested with described The other end connection of multicore cable.

2. the automatic line inspection system of multicore cable as described in claim 1, which is characterized in that the power-supply system includes external electricity Source and rechargeable battery.

3. the automatic line inspection system of multicore cable as described in claim 1, which is characterized in that the master controller by microcontroller or PLC or intelligent terminal are formed.

4. the automatic line inspection system of multicore cable as described in claim 1, which is characterized in that the testing element array includes resistance It is worth different resistance and diode, wherein, a resistance and a diode form a testing element unit, by tested more Core cable core number determines the usage quantity of testing element unit in testing element array, and testing element element number is tested more Core cable core number subtracts one.

5. the automatic line inspection system of multicore cable as claimed in claim 4, which is characterized in that during master controller work according to Signal acquisition, signal processing and report generation sequential working.

6. the automatic line inspection system of multicore cable as claimed in claim 5, which is characterized in that the master controller, for sending out Test signal control the relay group it is sequentially turned-on/shutdown contact to generate electric signal, the electric signal is successively via A ends Adapter system, tested multicore cable, B ends adapter system be transmitted to the testing element array；

The testing element array, for carrying out processing generation feedback signal to the electric signal, the feedback signal is via B ends Adapter system, tested multicore cable, A end connectors system feedback to the master controller；

The master controller is additionally operable to determine multicore cable circuit abnormal conditions after analyzing the feedback signal, as a result It is shown in the display with report form.

7. the automatic line inspection system of multicore cable as claimed in claim 5, which is characterized in that during the signal acquisition, by described Master controller sends out control signal and connects different circuit by relay different in relay group described in on-off, wherein, Two tested cores, testing element unit in the power-supply system, the power end fixed value resistance, the tested multicore cable Test loop is formed, is included in system as system feedback signal by the voltage got on fixed value resistance, the master controller pair Two tested cores all do forward direction, reversely measure twice, and all feedback signals are numbered and recorded.

8. the automatic line inspection system of multicore cable as claimed in claim 7, which is characterized in that the adapter system at the A ends and B ends Adapter system respectively include multiple matched cable sockets of preparation joint from different tested multicore cables.

9. the automatic line inspection system of multicore cable as claimed in claim 8, which is characterized in that the signal processing and report generation When, collected feedback signal is compared the master controller with wiring correct value preset in master controller obtains very Real wiring result；And true wiring result is generated into corresponding result report and to scheme according to used different cable sockets Table mode or explanatory note mode are shown over the display.