Cable insulation test method, device, equipment and medium

Abstract

The invention provides a cable insulation test method, device and equipment and a medium, which are applied to a control slave. Comprises: receiving an instruction sent by a control host; according to the instruction, determining a target to-be-tested cable and a single target relay corresponding to the target to-be-tested cable, respectively connecting a pin of the target to-be-tested cable with a high level of the target relay, connecting pins of other to-be-tested cables with low levels of corresponding relays, and connecting the to-be-tested cables in parallel; determining the total insulation resistance of all the to-be-tested cables according to the resistance of each to-be-tested cable, and switching on a preset power supply; measuring the voltage value of the to-be-measured total voltage corresponding to all the to-be-measured cables, and determining the resistance value of the insulation total resistance according to the voltage value of the to-be-measured total voltage; comparing the resistance value with a preset resistance threshold value, and determining insulation test results of all the to-be-tested cables according to a comparison result; therefore, the efficiency and the accuracy of the insulation test are improved.

Description

Technical Field

[0001] This application relates to the field of cable testing technology, and in particular to a method, apparatus, equipment and medium for testing the insulation of cables. Background Technology

[0002] Cable insulation testing is a technical means to evaluate the current-blocking ability of cable insulation layers. Its core purpose is to ensure the safe and reliable operation of electrical systems. By applying a specific voltage (DC or AC) to the cable, its insulation resistance is measured to determine whether the current-blocking performance of the insulation layer (such as rubber, plastic, etc.) meets the standards, thus avoiding faults such as leakage and short circuits caused by insulation failure.

[0003] Existing insulation testing methods generally use megohmmeters, or can control relay closure through semi-automatic or fully automatic means, using manual pressing of the corresponding control switch and manual reading.

[0004] However, existing insulation testing methods suffer from low testing efficiency and inaccurate test results. Summary of the Invention

[0005] This application provides a method, apparatus, equipment, and medium for testing the insulation of cables, applied to a control slave device, to solve the problems of low testing efficiency and inaccurate test results in existing insulation testing methods.

[0006] In a first aspect, this application provides a cable insulation testing method, applied to a control slave device, the method comprising: Receive instructions sent by the control host; According to the instructions, the target cable under test and its corresponding single target relay are determined, and the pins of the target cable under test are connected to the high level of the target relay, and the pins of other cables under test are connected to the low level of their corresponding relays. The cables under test are connected in parallel. Based on the resistance of each cable under test, determine the total insulation resistance of all cables under test, and then connect the preset power supply. Measure the total voltage value of all cables under test, and determine the total insulation resistance value based on the total voltage value. Compare the resistance value with the preset resistance threshold, and determine the insulation test results of all cables under test based on the comparison results.

[0007] In some embodiments of this application, according to instructions, a target cable under test and its corresponding single target relay are determined, and the pins of the target cable under test are connected to the high level of the target relay, and the pins of other cables under test are connected to the low level of their corresponding relays, including: Determine the cable information carried in the command; Based on the cable information, identify the target cable to be tested from all the cables to be tested, and identify the single target relay corresponding to the target cable to be tested; Connect the pins of the target cable under test to the high level of the target relay, and connect the pins of other cables under test to the low level of their respective relays.

[0008] In some embodiments of this application, the voltage value of the total voltage to be measured corresponding to all cables under test is measured, and the resistance value of the total insulation resistance is determined based on the voltage value of the total voltage to be measured, including: The voltage at both ends of the target cable is measured using a pre-set voltage measuring device to obtain the total voltage value to be measured. Determine the total insulation resistance value based on the voltage value of the total voltage to be measured.

[0009] In some embodiments of this application, determining the total insulation resistance value based on the voltage value of the total voltage to be measured includes: Based on the potential corresponding to the preset power supply, the total voltage to be measured, and the preset sampling resistor and protection resistor, determine the correspondence between the total voltage to be measured and the total insulation resistance; The total insulation resistance is determined based on the actual voltage value of the measured total voltage, the actual potential value corresponding to the potential, the actual resistance value of the preset sampling resistor and the actual resistance value of the protection resistor, and their corresponding relationships.

[0010] In some embodiments of this application, the resistance value is compared with a preset resistance threshold, and the insulation test results of all cables under test are determined based on the comparison results, including: The comparison results are obtained by comparing the total insulation resistance with the resistance value of the preset resistance threshold. If the comparison result shows that the total insulation resistance is greater than the preset resistance threshold, then the insulation test result is determined to be that the insulation resistance of all cables under test meets the insulation requirements. If the comparison result shows that the insulation resistance value is not greater than the preset resistance threshold, then the insulation test result is determined to be that among all the insulation resistance values ​​of the cables under test, at least one cable under test does not meet the insulation requirements.

[0011] In some embodiments of this application, after determining that the insulation resistance value is not greater than a preset resistance threshold and the insulation test result indicates that at least one cable under test does not meet the insulation requirements among all the insulation resistance values ​​of the cables under test, the method further includes: Based on the insulation test results, generate and output corresponding prompt messages.

[0012] In some embodiments of this application, after determining that the insulation resistance value is not greater than a preset resistance threshold and the insulation test result indicates that at least one cable under test does not meet the insulation requirements among all the insulation resistance values ​​of the cables under test, the method further includes: Store the insulation test results in a pre-set database.

[0013] Secondly, this application provides an insulation testing device for cables, applied to a control slave device, the device comprising: The receiving module is used to receive instructions sent by the control host; The connection module is used to determine the target cable under test and its corresponding single target relay according to the instruction, and connect the pin of the target cable under test to the high level of the target relay, and the pin of other cables under test to the low level of their corresponding relays. The cables under test are connected in parallel. The resistance determination module is used to determine the total insulation resistance of all cables under test based on the resistance of each cable under test, and then connect the preset power supply. The measurement module is used to measure the voltage value of the total voltage to be measured for all cables under test, and to determine the resistance value of the total insulation resistance based on the voltage value of the total voltage to be measured. The comparison module is used to compare the resistance value with the preset resistance threshold, and determine the insulation test results of all cables under test based on the comparison results.

[0014] Thirdly, this application provides a computer device, including: a processor, and a memory communicatively connected to the processor; The memory stores instructions that the computer executes; The processor executes computer execution instructions stored in memory to implement the method of this application.

[0015] Fourthly, this application provides a computer-readable storage medium storing program code, which, when executed by a processor, is used to implement the method of this application.

[0016] This application provides a method, apparatus, device, and medium for testing the insulation of cables. Applied to a control slave device, it receives instructions from a control host; according to the instructions, it identifies the target cable under test and its corresponding individual target relay, and connects the pins of the target cable under test to the high level of the target relay, and the pins of other cables under test to the low level of their corresponding relays, with the cables under test connected in parallel; based on the resistance of each cable under test, it determines the total insulation resistance of all cables under test and connects a preset power supply; it measures the voltage value of the total voltage corresponding to all cables under test, and determines the total insulation resistance based on the voltage value; it compares the resistance value with a preset resistance threshold, and determines the insulation test result of all cables under test based on the comparison result.

[0017] In this way, by utilizing the characteristics of parallel resistors, the insulation testing requirements of all cables under test can be met through a single test point and a single relay test scheme. This achieves the effects of reducing the size of the test equipment, maintaining test efficiency, reducing test costs, and improving the reliability of the test equipment. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 A schematic flowchart illustrating an insulation testing method for cables provided in this application embodiment; Figure 2 A schematic diagram of a cable insulation testing method provided in an embodiment of this application; Figure 3 A circuit diagram illustrating an insulation testing method for cables provided in an embodiment of this application; Figure 4 A schematic diagram of an insulation testing method for cables provided in this application embodiment; Figure 5 A hardware schematic diagram of a cable insulation testing method provided in an embodiment of this application; Figure 6 A schematic diagram of a cable insulation testing method provided in an embodiment of this application; Figure 7 A schematic diagram of the structure of an insulation testing device for cables provided in an embodiment of this application; Figure 8 This is a structural block diagram of an apparatus for performing an insulation testing method for a cable according to an embodiment of this application. Detailed Implementation

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0021] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0022] Figure 1 This is a flowchart illustrating a cable insulation testing method provided in an embodiment of this application, applied to a control slave device. For example... Figure 1 As shown, the insulation test method for this type of cable may include the following steps: S110, Receive instructions sent by the control host.

[0023] This method applies to control slave devices. The control master and control slave devices are used to control power supplies and relays during cable insulation testing. The control master can control multiple control slave devices and send commands to them, enabling the control slave devices to determine the target cable under test according to the commands. Please refer to [link / reference needed]. Figure 2 , Figure 2 A system schematic diagram of a cable insulation testing method provided in this application embodiment; as shown. Figure 2 As shown, the information device of the insulation testing software is connected to the test host via Ethernet. The test host controls the test slaves via communication cables, and multiple test slaves are connected in series via cascading cables.

[0024] Based on this, by receiving instructions from the control host, the connection method between each cable under test and the corresponding relay can be determined according to the instructions, thereby measuring the voltage in the circuit, and further determining the total insulation resistance in the circuit based on the circuit voltage, so as to determine the insulation test result of the cable under test based on the insulation resistance.

[0025] S120. According to the instruction, determine the target cable under test and its corresponding single target relay, and connect the pin of the target cable under test to the high level of the target relay, and the pin of the other cables under test to the low level of their corresponding relays. The cables under test are connected in parallel.

[0026] A relay is an electrical control device that uses a low-voltage, low-current control circuit to connect or disconnect a high-voltage, high-current operating circuit. By changing the switching direction of the relay, the circuit can be changed or switched. In other words, different pins of the relay correspond to different voltage levels. By changing the connection between the cable and the different pins of the relay, the corresponding voltage level can be changed, thereby changing or switching the circuit.

[0027] The cable under test requires insulation testing. Damage or aging of the cable's insulation layer can lead to current leakage, wasting electrical energy and potentially making exposed metal parts live. Contact with these live parts can easily result in electric shock; therefore, insulation testing of the cable under test is necessary.

[0028] The target cable under test is the cable under test that corresponds to the command sent by the control host among all the cables under test. The command sent by the control host can carry the corresponding cable information, such as the cable information of cable under test 1, so that the control slave can determine the target cable under test corresponding to the cable information carried by the command based on the received command.

[0029] The target relay is the relay corresponding to the target cable under test. In practical applications, the target cable under test can be connected to the high-level pin of the target relay, and other cables under test can be connected to the low-level pin of the corresponding relay to form a complete circuit loop.

[0030] Please refer to Figure 3 , Figure 3 A circuit diagram illustrating a cable insulation testing method provided in this application embodiment; as shown. Figure 3 As shown, each cable under test will correspond to one and only one relay. The target relay is the relay used to connect with the target cable under test to form a circuit loop. Furthermore, the fact that the cable under test corresponds to only a single relay can improve testing efficiency and reduce equipment size. By changing the connection between the cable under test and the corresponding relay's high or low level, a circuit loop is formed, so that the insulation resistance of the cable under test can be measured based on the voltage and current in the circuit.

[0031] Based on this, by identifying the target cable under test and its corresponding target relay that matches the instruction among all the cables under test, connecting the target cable under test to the high-level pin of the target relay, and connecting the other cables under test to the low-level pin of the corresponding relay, a complete circuit loop is formed.

[0032] S130. Determine the total insulation resistance of all cables under test based on the resistance of each cable, and connect the preset power supply.

[0033] The total insulation resistance is the total resistance obtained by considering the resistance of all the cables under test. In other words, the total insulation resistance represents the resistance of the entire circuit loop. For example, if the cables under test in the circuit loop are connected in series, the corresponding total insulation resistance is the sum of the insulation resistances of each cable under test. If the cables under test in the circuit loop are connected in parallel, the reciprocal of the corresponding total insulation resistance is the sum of the reciprocals of the insulation resistances of each cable under test.

[0034] The preset power supply is a pre-set excitation source used to supply power to the entire circuit loop, and its potential value is known.

[0035] Furthermore, in practical applications, when the cable under test connected to the high level of the relay is connected to the preset power supply, i.e., the circuit is completed, leakage current will be generated. This current will flow through other cables under test, causing other cables under test to also have voltage values. Leakage current refers to the current that leaks through the insulation layer or other unexpected paths when the cable under test is connected to a high-voltage circuit during insulation testing, due to insufficient or damaged insulation layer performance. Aging, damage, or manufacturing defects in the cable insulation layer will reduce its insulation resistance. The current that should have been blocked by the insulation layer will leak through these defects to other wire harnesses or ground terminals. Therefore, all cables under test will have current flowing through them. Thus, each cable under test can be regarded as a complete parallel resistor.

[0036] Based on this, in practical applications, the cables under test can be connected in parallel. By determining the insulation resistance of each cable under test, the total resistance of the entire circuit can be determined. Since there is leakage current, there can be a certain correspondence between resistance and voltage. Subsequently, the total resistance can be determined based on the voltage value corresponding to the total voltage of the circuit. In order to determine whether the current cable under test has an insulation fault based on the total insulation resistance value.

[0037] S140. Measure the voltage value of the total voltage to be measured for all cables under test, and determine the resistance value of the total insulation resistance based on the voltage value of the total voltage to be measured.

[0038] The total voltage to be measured is the voltage corresponding to all cables under test. Please refer to [reference needed]. Figure 4 , Figure 4 A schematic diagram of a cable insulation testing method provided in this application embodiment; as shown. Figure 4 As shown, multiple cables under test, such as R1, R2, ..., Rn, are connected in parallel and can be regarded as a whole resistor Rx. The total voltage to be measured is the voltage on both sides of Rx. In the circuit, the voltage between parallel resistors is equal, that is, the voltage between multiple cables under test, such as R1, R2, ..., Rn, is equal and is the total voltage to be measured.

[0039] Based on this, multiple cables under test are connected in parallel. According to the circuit characteristics of parallel circuits, the voltages of the cables under test are equal. Therefore, by measuring the total voltage of all the cables under test, the total insulation resistance can be determined based on the circuit correspondence between the voltage and resistance of the cables under test.

[0040] S150. Compare the resistance value with the preset resistance threshold, and determine the insulation test results of all cables under test based on the comparison results.

[0041] The preset resistance threshold is a pre-set resistance threshold used to compare with the total insulation resistance of the circuit loop to determine whether the total insulation resistance of all cables under test meets the insulation requirements. The insulation requirements can be understood as the user's insulation standard for the cables under test, used to determine whether the cables under test are qualified. If the insulation requirements are met, it means that the cables under test meet the insulation standard and are qualified cables. If the insulation requirements are not met, it means that the cables under test may have a safety accident and need to be replaced to ensure circuit safety.

[0042] Based on the feasible implementation of S120 described above, this application further provides the following steps: determining the target cable under test and its corresponding single target relay according to instructions, and connecting the pins of the target cable under test to the high level of the target relay, and the pins of other cables under test to the low level of their corresponding relays, including: Determine the cable information carried in the command; Based on the cable information, identify the target cable to be tested from all the cables to be tested, and identify the single target relay corresponding to the target cable to be tested; Connect the pins of the target cable under test to the high level of the target relay, and connect the pins of other cables under test to the low level of their respective relays.

[0043] The cable information can be understood as the identification information corresponding to the cable under test, which can be used to identify the corresponding target cable under test from all the cables under test; for example, the cables under test can be numbered in advance, and the cable information is the number information corresponding to the cable under test, so as to determine the corresponding target cable under test.

[0044] Based on this, by determining the cable information contained in the instructions sent by the control host, the control slave can identify the corresponding target cable from multiple cables under test and determine the corresponding target relay.

[0045] Based on the feasible implementation of S140 described above, this application further provides the steps of measuring the voltage value of the total voltage to be measured corresponding to all cables under test, and determining the resistance value of the total insulation resistance based on the voltage value of the total voltage to be measured, wherein the voltage value of each cable under test is the voltage value of the total voltage to be measured. The voltage at both ends of the target cable is measured using a pre-set voltage measuring device to obtain the total voltage value to be measured. Determine the total insulation resistance value based on the voltage value of the total voltage to be measured.

[0046] The preset voltage measuring device is a pre-set voltage measuring device used to measure the voltage in the circuit loop, such as a preset voltmeter.

[0047] Based on this, since multiple cables under test are connected in parallel, the voltage value of the target cable under test can be measured to determine the voltage value of the multiple cables under test. By processing the resistance of the multiple cables under test into a complete resistance and measuring the voltage value of the corresponding total voltage, the resistance value can be determined based on the correspondence between the voltage and resistance of this complete resistance.

[0048] Based on the feasible implementation of S140 described above, this application further provides a method for determining the resistance value of the total insulation resistance based on the voltage value of the total voltage to be measured, including the following steps: Based on the potential corresponding to the preset power supply, the total voltage to be measured, and the preset sampling resistor and protection resistor, determine the correspondence between the total voltage to be measured and the total insulation resistance; The total insulation resistance is determined based on the actual voltage value of the measured total voltage, the actual potential value corresponding to the potential, the actual resistance value of the preset sampling resistor and the actual resistance value of the protection resistor, and their corresponding relationships.

[0049] The correspondence is the rule between voltage and resistance. The potential of the preset power supply can be represented by Es (e.g., adjustable from 100V to 1000V), Ra is the equivalent internal resistance (e.g., 10Ω), Ro is the sampling resistor (e.g., 1kΩ), Rs is the circuit protection resistor (e.g., 1MΩ), Rx represents the parallel value of the insulation resistance of the cable under test, and Uo is the total voltage to be measured. The correspondence can then be characterized as follows: ; Since Es, Ra, Ro, and Rs are all known, after determining Uo by measurement, the actual values ​​of other indicators can be substituted into the corresponding relationship to obtain the resistance value corresponding to Rx.

[0050] Based on this, the correspondence between the total voltage to be tested and the total insulation resistance of all cables under test is determined. After the voltage value of the total voltage to be tested is measured, each data is substituted into the correspondence to calculate and determine the actual resistance value of the total insulation resistance. In order to determine whether the cable under test meets the insulation requirements based on the actual resistance value and the preset resistance threshold, the following steps are taken.

[0051] Based on the feasible implementation of S150 described above, this application further provides the steps of comparing the resistance value and the preset resistance threshold, and determining the insulation test results of all cables under test based on the comparison results: The comparison results are obtained by comparing the total insulation resistance with the resistance value of the preset resistance threshold. If the comparison result shows that the total insulation resistance is greater than the preset resistance threshold, then the insulation test result is determined to be that the insulation resistance of all cables under test meets the insulation requirements. If the comparison result shows that the insulation resistance value is not greater than the preset resistance threshold, then the insulation test result is determined to be that among all the insulation resistance values ​​of the cables under test, at least one cable under test does not meet the insulation requirements.

[0052] Among them, insulation requirements are the user's requirements for the cable under test, indicating whether the cable under test is qualified in terms of insulation.

[0053] Based on this, due to the characteristics of parallel resistors, that is, the total resistance obtained by parallel connection is less than the resistance value of any one of the individual resistors, if the total insulation resistance is greater than the preset resistance threshold, it means that the insulation resistance of multiple cables under test, such as R1, R2, ..., Rn, is greater than the preset resistance threshold. In other words, the insulation resistance between cable harness 1 under test and the other cable harnesses connected to the test system is qualified and meets the insulation requirements. If the total insulation resistance is not greater than the preset resistance threshold, it means that at least one of R1, R2, ..., Rn is not greater than the required insulation resistance value. The system will determine that at least one of the cable harnesses under test and the other cable harnesses connected to the test system is unqualified and does not meet the insulation requirements.

[0054] Based on the feasible implementation of S150 described above, this application further provides the following steps after determining that, if the comparison result shows that the insulation resistance value is not greater than a preset resistance threshold, and the insulation test result is that among all the insulation resistance values ​​of the cables under test, at least one cable under test does not meet the insulation requirements: Based on the insulation test results, generate and output corresponding prompt messages.

[0055] The prompt information is used to inform the user of the insulation test results of the cable under test.

[0056] Based on this, if at least one cable under test fails to meet the insulation requirements among all the cables under test, it indicates that there is a safety hazard in the current cable under test. Thus, a prompt message is generated to remind the user to conduct a safety check in order to improve equipment safety.

[0057] Based on the feasible implementation of S150 described above, this application further provides the following steps after determining that, if the comparison result shows that the insulation resistance value is not greater than a preset resistance threshold, and the insulation test result is that among all the insulation resistance values ​​of the cables under test, at least one cable under test does not meet the insulation requirements: Store the insulation test results in a pre-set database.

[0058] The preset information database is a pre-defined database used to store information, which can store the insulation test results of the cable under test.

[0059] Based on this, by storing the insulation test results of each test, users can view the number of insulation cycles and the corresponding insulation results of the cable under test at any time, thereby gaining a better understanding of the actual situation of the cable under test.

[0060] Please refer to Figure 5 , Figure 5 A hardware schematic diagram of a cable insulation testing method provided in this application embodiment; as shown. Figure 5 As shown, during insulation testing, the test host controls the excitation source and relay matrix according to the test requirements issued by the test software, and supplies power to this circuit through the power supply. The test slave includes a slave motherboard, slave backplane, relay board, test interface and cascade port. Multiple test slaves are connected through the cascade port. The test slaves are connected to the on-board cables through connecting cables, thus forming a complete test circuit for insulation testing.

[0061] Please refer to Figure 6 , Figure 6 This is a schematic diagram of a cable insulation testing method provided in an embodiment of this application; as shown. Figure 6 As shown, Step 1: Set up the insulation testing system. The testing system mainly includes testing software, a testing host, testing slaves, and adapter cables. The testing system is set up by connecting the information device with the insulation testing software to the testing host via Ethernet. The testing host controls the testing slaves via communication cables, and multiple testing slaves are connected in series via cascading cables.

[0062] Step 2: During the insulation test, the test host controls the excitation source and relay matrix according to the test requirements issued by the test software.

[0063] Step 3: During the test, the slave motherboard controls the relay matrix according to the test instructions. When the test task is wire harness 1 under test, each test point is connected to a single relay. The test software controls the relays to connect all conductive pins in wire harness 1 under test to the high-voltage end of the insulation test, while all other pins, such as those in wire harness 2, wire harness 3, and wire harness M under test, are connected to the low end of the insulation test circuit.

[0064] Step 4: When performing insulation testing on the wire harness 1 under test, close the excitation source and the acquisition relay. Apply voltage to the dark bus, and after passing through the relay connected to pin 1, apply voltage to the wire harness 1 under test. The wire harness under test generates leakage current, which is transmitted to other wire harnesses. After passing through the remaining relays, it is sent to the leakage current acquisition circuit through the light bus, thus completing the insulation test of this wire harness.

[0065] Step 5: Calculate the actual measured insulation resistance value based on the current-voltage method principle. Es is the power supply potential, Ra is the equivalent internal resistance, Ro is the sampling resistor, Rs is the circuit protection resistor, and Rx represents the parallel value of the insulation resistance of the cable under test.

[0066] ; The transformation yields: ; Where Ro is the sampling resistor (e.g., 1kΩ), Es is the adjustable input voltage (e.g., 100V-1000V adjustable), Uo is the measured voltage, Ra is the cable equivalent resistance (e.g., 10Ω), and Rs is the protective resistor (e.g., 1MΩ). Based on the known quantities and the measured voltage value, the parallel insulation resistance value Rx of the wire harness under test can be calculated. The testing host will then compare the Rx value with the required insulation resistance value (e.g., 20mΩ).

[0067] ; Where R1, R2...Rn are the resistors corresponding to multiple cables under test.

[0068] because Therefore, the measurement results can be in the following two situations: Case 1: If Rx is greater than the required value, it means that R1, R2, ..., Rn are all greater than the required value. The system will determine that the insulation resistance between the wire harness under test 1 and the other wire harnesses connected to the test system is qualified, and output the test result "qualified".

[0069] Case 2: If Rx is less than the required value, it means that at least one of R1, R2, ..., Rn is less than the required insulation resistance value. The system will determine that there is at least one non-compliance between the test harness 1 and the other harnesses connected to the test system, and output the test result "non-compliance" for further investigation.

[0070] Step 6: Output and save the test results to complete the insulation test.

[0071] In some embodiments of this application, by receiving and determining the cable information carried in the instruction sent by the control host, a target cable under test corresponding to the cable information is determined from multiple cables under test, and a single target relay corresponding to the target cable under test is identified. The multiple cables under test are connected in parallel via wires. The target cable under test is connected to the high level of its corresponding target relay, and the other cables under test are connected to the low level of their respective relays. A preset power supply is then turned on to supply power to the circuit, thereby powering the target cable under test. Furthermore, based on the leakage current generated by the target cable under test, current flows through each cable under test. Since the multiple cables under test are connected in parallel, the cables under test can be considered as a total insulation resistance obtained in parallel. The correspondence between the total voltage under test and the total insulation resistance is determined. The system measures the total voltage of the cables under test using pre-set measuring equipment. Then, it calculates the total insulation resistance using the corresponding relationship. This value is then compared to the total insulation resistance of all cables under test with a preset resistance threshold. Since the total insulation resistance is determined based on the resistance of the parallel cables under test, meaning the total insulation resistance is less than the resistance of any single cable under test, if the comparison shows the total insulation resistance is greater than the preset resistance threshold, the insulation test result indicates that the insulation resistance of all cables under test meets the insulation requirements. If the comparison shows the insulation resistance is not greater than the preset resistance threshold, the insulation test result indicates that at least one cable under test does not meet the insulation requirements. A prompt message is then generated to alert the user to conduct a safety check and eliminate potential safety hazards.

[0072] In this way, by utilizing the characteristics of parallel resistors and reducing the number of relays at individual test points in the insulation testing equipment, a low-cost design of the insulation testing equipment can be achieved. Furthermore, by using the method of unified scheduling of the relay matrix on the test slave motherboard, the insulation resistance between a single tested wire harness and multiple wire harnesses can be measured in a single test. After further calculation, all test requirements can be met, effectively reducing the size and cost of the testing equipment, improving testing efficiency, lowering testing costs, and enhancing the reliability of the testing equipment.

[0073] Figure 7 This is a schematic diagram of the structure of a cable insulation testing device 700 provided in an embodiment of this application, which is used to control a slave device. Figure 7 As shown, the insulation testing device 700 for cables includes: a receiving module 710, a connecting module 720, a resistance determination module 730, a measuring module 740, and a comparison module 750; wherein: The receiving module 710 is used to receive instructions sent by the control host; The connection module 720 is used to determine the target cable under test and its corresponding single target relay according to the instruction, and connect the pin of the target cable under test to the high level of the target relay, and the pin of other cables under test to the low level of their corresponding relays. The cables under test are connected in parallel. The resistance determination module 730 is used to determine the total insulation resistance of all cables under test based on the resistance of each cable under test, and to connect a preset power supply. The measurement module 740 is used to measure the voltage value of the total voltage to be measured for all cables under test, and to determine the resistance value of the total insulation resistance based on the voltage value of the total voltage to be measured. The comparison module 750 is used to compare the resistance value with the preset resistance threshold, and determine the insulation test results of all cables under test based on the comparison results.

[0074] In this embodiment of the application, the connection module 720 can also be specifically used for: Determine the cable information carried in the command; Based on the cable information, identify the target cable to be tested from all the cables to be tested, and identify the single target relay corresponding to the target cable to be tested; Connect the pins of the target cable under test to the high level of the target relay, and connect the pins of other cables under test to the low level of their respective relays.

[0075] In this embodiment of the application, the measurement module 740 can also be specifically used for: The voltage at both ends of the target cable is measured using a pre-set voltage measuring device to obtain the total voltage value to be measured. Determine the total insulation resistance value based on the voltage value of the total voltage to be measured.

[0076] In this embodiment of the application, the measurement module 740 can also be specifically used for: Based on the potential corresponding to the preset power supply, the total voltage to be measured, and the preset sampling resistor and protection resistor, determine the correspondence between the total voltage to be measured and the total insulation resistance; The total insulation resistance is determined based on the actual voltage value of the measured total voltage, the actual potential value corresponding to the potential, the actual resistance value of the preset sampling resistor and the actual resistance value of the protection resistor, and their corresponding relationships.

[0077] In this embodiment of the application, the comparison module 750 can also be specifically used for: The comparison results are obtained by comparing the total insulation resistance with the resistance value of the preset resistance threshold. If the comparison result shows that the total insulation resistance is greater than the preset resistance threshold, then the insulation test result is determined to be that the insulation resistance of all cables under test meets the insulation requirements. If the comparison result shows that the insulation resistance value is not greater than the preset resistance threshold, then the insulation test result is determined to be that among all the insulation resistance values ​​of the cables under test, at least one cable under test does not meet the insulation requirements.

[0078] In this embodiment of the application, the comparison module 750 can also be specifically used for: Based on the insulation test results, generate and output corresponding prompt messages.

[0079] In this embodiment of the application, the comparison module 750 can also be specifically used for: Store the insulation test results in a pre-set database.

[0080] Figure 8 This is a schematic diagram of the structure of an apparatus for performing an insulation testing method for a cable according to an embodiment of this application. Figure 8 As shown, the device 800 includes: The device 800 may include a processor 801 with one or more processing cores, a memory 802 with one or more computer-readable storage media, a communication component 803, and other components. The processor 801, memory 802, and communication component 803 are connected via a bus 804.

[0081] In the specific implementation process, at least one processor 801 executes computer execution instructions stored in memory 802, causing at least one processor 801 to execute the above-described cable insulation test method.

[0082] The specific implementation process of processor 801 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0083] Furthermore, the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0084] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0085] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0086] In some embodiments, a computer program product is also provided, including a computer program or instructions that, when executed by a processor, implement the steps in any of the above-described insulation testing methods for cables.

[0087] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0088] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0089] Therefore, embodiments of this application provide a computer-readable storage medium storing a plurality of program codes that can be loaded by a processor to execute the steps in any of the cable insulation testing methods provided in embodiments of this application.

[0090] The storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0091] According to one aspect of this application, a computer program product or computer program is provided, the computer program product or computer program including computer instructions stored in a computer-readable storage medium.

[0092] Since the instructions stored in the storage medium can execute the steps in any of the cable insulation testing methods provided in the embodiments of this application, the beneficial effects that any of the cable insulation testing methods provided in the embodiments of this application can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0093] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

[0094] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A method for testing the insulation of cables, characterized in that, Applied to controlling a slave device, the method includes: Receive instructions sent by the control host; According to the instructions, the target cable under test and its corresponding single target relay are determined, and the pins of the target cable under test are connected to the high level of the target relay, and the pins of other cables under test are connected to the low level of their corresponding relays. The cables under test are connected in parallel. Based on the resistance of each of the cables under test, determine the total insulation resistance of all the cables under test, and then connect the preset power supply. Measure the voltage value of the total voltage to be measured for all the cables under test, and determine the resistance value of the total insulation resistance based on the voltage value of the total voltage to be measured; The resistance value is compared with the preset resistance threshold, and the insulation test results of all the cables under test are determined based on the comparison results.

2. The method according to claim 1, characterized in that, The step of determining the target cable under test and its corresponding single target relay according to the instruction, and connecting the pins of the target cable under test to the high level of the target relay, and the pins of other cables under test to the low level of their corresponding relays, includes: Determine the cable information carried in the instruction; Based on the cable information, determine the target cable to be tested corresponding to the cable information from all the cables to be tested, and determine the single target relay corresponding to the target cable to be tested; Connect the pins of the target cable under test to the high level of the target relay, and connect the pins of the other cables under test to the low level of their respective relays.

3. The method according to claim 1, characterized in that, The process of measuring the total voltage value corresponding to all the cables under test, and determining the total insulation resistance value based on the total voltage value, includes: The voltage at both ends of the target cable to be tested is measured using a preset voltage measuring device to obtain the voltage value of the total voltage to be tested. The resistance value of the total insulation resistance is determined based on the voltage value of the total voltage to be measured.

4. The method according to claim 3, characterized in that, Determining the resistance value of the total insulation resistance based on the voltage value of the total voltage to be measured includes: Based on the potential corresponding to the preset power supply, the total voltage to be measured, and the preset sampling resistor and protection resistor, determine the correspondence between the total voltage to be measured and the total insulation resistance; The resistance value of the total insulation resistance is determined based on the measured actual voltage value of the total voltage to be measured, the actual potential value corresponding to the potential, the actual resistance value of the preset sampling resistor and the actual resistance value of the protection resistor, and the corresponding relationship.

5. The method according to claim 1, characterized in that, The comparison of the resistance value with a preset resistance threshold, and the determination of the insulation test results for all the cables under test based on the comparison results, include: The comparison result is obtained by comparing the total insulation resistance with the resistance value of the preset resistance threshold. If the comparison result shows that the total insulation resistance is greater than the preset resistance threshold, then the insulation test result is determined to be that the insulation resistance of all the cables under test meets the insulation requirements. If the comparison result is that the insulation resistance value is not greater than the preset resistance threshold, then the insulation test result is determined to be that among all the insulation resistances of the cables under test, at least one cable under test does not meet the insulation requirements.

6. The method according to claim 5, characterized in that, If the comparison result indicates that the insulation resistance value is not greater than the preset resistance threshold, and the insulation test result is determined to be that among all the insulation resistance values ​​corresponding to the cables under test, at least one cable under test does not meet the insulation requirements, the method further includes: Based on the insulation test results, generate and output corresponding prompt messages.

7. The method according to claim 5, characterized in that, If the comparison result indicates that the insulation resistance value is not greater than the preset resistance threshold, and the insulation test result is determined to be that among all the insulation resistance values ​​corresponding to the cables under test, at least one cable under test does not meet the insulation requirements, the method further includes: The insulation test results are stored in a preset database.

8. An insulation testing device for cables, characterized in that, The device, used for controlling a slave device, includes: The receiving module is used to receive instructions sent by the control host; The connection module is used to determine the target cable under test and its corresponding single target relay according to the instruction, and to connect the pin of the target cable under test to the high level of the target relay, and the pin of the other cables under test to the low level of their corresponding relays, respectively. The cables under test are connected in parallel. The resistance determination module is used to determine the total insulation resistance of all the cables under test based on the resistance of each cable under test, and to connect a preset power supply. The measurement module is used to measure the voltage value of the total voltage to be measured corresponding to all the cables under test, and determine the resistance value of the total insulation resistance based on the voltage value of the total voltage to be measured. The comparison module is used to compare the resistance value with the preset resistance threshold, and determine the insulation test results of all the cables under test based on the comparison results.

9. A device, characterized in that, include: One or more processors; Memory; One or more programs, wherein the one or more programs are stored in memory and configured to be executed by one or more processors, the one or more programs being configured to perform the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program code that can be called by a processor to perform the method as described in any one of claims 1 to 7.

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