Universal aviation cable detection equipment and method

Abstract

The invention provides a universal aviation cable detection device and method.The device comprises an industrial personal computer, an aviation cable core resistance value measurement host, a test cable and an aviation cable qualification self-judgment system.The measurement host comprises a power supply module, an output board card, an input board card and a power-on indicator light; the self-judgment system comprises a serial port communication module and a qualification self-judgment module integrated in an industrial personal computer. According to the working principle, a constant voltage source is applied to a measured aviation cable through the output board card, a voltage signal is collected through the high-resistance-state AD collection module, calculation and analysis are conducted through the qualification self-judgment module, and high-precision measurement of the resistance value of a cable core, automatic judgment of the line sequence state and intelligent quality evaluation based on a multi-stage configurable threshold value are achieved. Therefore, the problems of low core-by-core measurement efficiency and insufficient precision of a traditional universal meter are solved, and the automation degree and the reliability of aviation cable detection are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of testing equipment technology, and in particular relates to a general-purpose aviation cable testing equipment and method. Background Technology

[0002] As the "nerve network" for signal transmission and power supply between various modules within aircraft, missiles, and other aircraft, the correctness of the wiring sequence and the electrical quality of the wire cores directly affect the reliability and safety of the entire system. In airborne and missile-borne systems, problems such as incorrect wiring sequence, short circuits, open circuits, or wire core resistance exceeding the allowable tolerance range in aviation cables can lead to serious consequences such as signal transmission distortion, malfunctioning control commands, and abnormal power supply. For example, in missile guidance systems, even a slight deviation in cable resistance can affect the accuracy of positioning signals, thereby directly impacting the hit rate; in aircraft avionics systems, incorrect wiring sequence can cause system malfunctions, posing a potential threat to flight safety.

[0003] Currently, the conventional testing methods for aviation cables mainly rely on manual core-by-core measurements using multimeters. This traditional method has significant limitations: First, its testing efficiency is low, making it difficult to meet the rapid testing needs of complex aviation cables with dozens or even hundreds of cores; second, the measurement accuracy of multimeters is limited, typically only reaching the 0.1Ω level, while the resistance error range required for high-quality aviation cables is usually within tens of milliohms (mΩ), which traditional tools cannot meet; third, manual operation and recording are prone to introducing human error, and it is difficult to systematically and accurately judge and record the wire sequence status (such as short circuit, open circuit, and missequence). Especially in the assessment of the quality status of cable cores, existing technologies are significantly inadequate, lacking the ability to automatically compare and intelligently judge the resistance measurement results with preset, graded quality standards. Summary of the Invention

[0004] In view of this, the purpose of this invention is to propose a general-purpose aviation cable testing device and method for realizing high-precision automated measurement of the core resistance of aviation cables, rapid and accurate judgment of the wire sequence status, and intelligent evaluation of the core quality, so as to at least partially solve the problems in related technologies.

[0005] To achieve the above objectives, the first aspect of this disclosure provides a general-purpose aviation cable testing device, including: an industrial control computer, an aviation cable core resistance measurement host, a test cable, and an aviation cable qualification self-judgment system;

[0006] The aviation cable core resistance measurement host includes a power supply module, an output board, an input board, and a power-on indicator light;

[0007] The aviation cable qualification self-judgment system includes a serial communication module and a qualification self-judgment module. The industrial control computer is connected to the aviation cable core resistance measurement host through the serial communication module. The qualification self-judgment module is integrated into the industrial control computer. The power supply module provides working power for the industrial control computer and the aviation cable core resistance measurement host. The power-on indicator is set on the aviation cable core resistance measurement host to display the power status of the aviation cable core resistance measurement host.

[0008] One or more connectors of the aviation cable under test are respectively connected to the corresponding connectors of the test cable. The input end of the test cable is connected to the input board, and the output end of the test cable is connected to the output board. The output board outputs a constant voltage source with a preset voltage value to the test cable. The input board acquires the voltage signal through the AD acquisition module and transmits the data to the pass / fail self-judgment module through the serial communication module. Then, the pass / fail self-judgment module calculates the resistance value and judges the cable quality.

[0009] Furthermore, it also includes standard server racks and standard keyboard / video / mouse switchers;

[0010] The standard cabinet is used to house the standard keyboard and video mouse switcher, the industrial control computer, and the aviation cable core resistance measurement host, and provides installation support and electromagnetic shielding environment.

[0011] Furthermore, the standard keyboard-video-mouse switcher is connected to the industrial control computer to control the switching of keyboard, video, and mouse signals of the industrial control computer.

[0012] Furthermore, the constant voltage source output by the output board is connected in parallel at the output node of the high-precision resistor after passing through a high-precision resistor to split into a first path and a second path.

[0013] The end of the first path is connected to the input terminal of the AD acquisition module for acquiring the voltage signal across the high-precision resistor; the end of the second path is connected to the aviation cable under test via a test cable to form a complete measurement loop; the loop current flowing through the aviation cable under test is calculated using the voltage signal acquired by the AD acquisition module, and then the resistance value of the aviation cable under test is calculated; the AD acquisition module is a high-resistivity AD acquisition module.

[0014] Furthermore, when measuring the first core of the aviation cable under test, the first output relay is closed to output the first constant voltage source of the output board to the test cable, and then to the first core of the aviation cable under test.

[0015] When measuring other cores of the aviation cable under test, close the corresponding output relays one by one to output the constant voltage source of the output board to the test cable, and then output it to the corresponding core of the aviation cable under test.

[0016] Furthermore, the qualification self-judgment module is configured to determine and output the quality level of the tested aviation cable core based on the absolute value of the difference between the factory specification resistance value R5 of different cores and the calculated resistance value R4 of the tested aviation cable, |R4-R5|.

[0017] Furthermore, the general-purpose aviation cable testing equipment controls the output board to close each output channel in sequence and collects the status of each channel synchronously through the input board, thereby realizing the line sequence detection of the aviation cable under test.

[0018] A second aspect of this disclosure also provides a general-purpose aviation cable testing method, comprising the following steps:

[0019] The output board is controlled to output constant voltage sources to each core of the tested aviation cable in sequence, and the corresponding voltage signals are acquired through the input board and the AD acquisition module.

[0020] Based on the acquired voltage signal, the resistance value of the tested aviation cable is calculated by the qualification self-judgment module.

[0021] The self-assessment module for qualification compares the calculated resistance value with the preset factory specification resistance value, and determines the quality grade of the wire core based on the difference.

[0022] Furthermore, the calculation of the resistance value of the tested aviation cable by the qualification self-judgment module includes:

[0023] Read the voltage value V1 acquired by the AD acquisition module. Based on the known constant voltage source voltage V2 and high-precision resistor R1, calculate the current I1 = (V2 - V1) / R1. Calculate the total resistance R2 of the test cable and the aviation cable under test based on I1 and V1. Calculate the resistance R4 = R2 - R3 of the aviation cable under test by checking the cable resistance R3.

[0024] Furthermore, the method of determining the wire core quality grade based on the difference is as follows:

[0025] When 0mΩ < |R4-R5| < 50mΩ, the wire core quality is considered excellent.

[0026] When 50mΩ < |R4-R5| < 100mΩ, the wire core quality is judged to be good;

[0027] When |R4-R5|>100mΩ, the wire core quality is considered poor.

[0028] R5 represents the factory-specified resistance value of the corresponding wire core.

[0029] Through the above technical solution, the power supply module provides a stable and reliable working power supply for the entire system. The power-on indicator light displays the power status of the measuring host in real time, providing a basic guarantee for the safe operation of the equipment. The output board outputs a constant voltage source with a preset voltage value, which is applied to the aviation cable under test through the test cable. At the same time, the input board collects the voltage signal through the AD acquisition module. Meanwhile, the industrial control computer establishes a reliable data transmission channel with the aviation cable core resistance measurement host through the serial communication module, and transmits the collected voltage signal to the qualification self-judgment module integrated in the industrial control computer. The qualification self-judgment module can not only accurately calculate the cable resistance value based on the collected voltage signal, but also automatically judge the cable quality according to preset standards. Specifically, firstly, through the cooperation of the AD acquisition module and the pass / fail self-judgment module, the resistance measurement accuracy reaches the 5mΩ level, far exceeding the measurement accuracy of traditional multimeters; secondly, the collaborative work of the output board and input board, together with the analysis and judgment of the pass / fail self-judgment module, can automatically detect multiple states such as normal, abnormal, short circuit, and open circuit in one go; finally, the integrated design of the industrial control computer and the pass / fail self-judgment module allows the equipment to flexibly set multi-level quality judgment thresholds according to different application scenarios, greatly improving the versatility and intelligence level of the equipment. Attached Figure Description

[0030] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0031] Figure 1 This is a schematic diagram of the connection relationship of the general aviation cable inspection equipment provided in the exemplary embodiments of this disclosure;

[0032] Figure 2 This is a schematic diagram of the electrical structure of the general-purpose aviation cable testing equipment provided in an exemplary embodiment of this disclosure;

[0033] Figure 3 This is a schematic diagram of the connection relationship between the output board and the input board during measurement, provided in an exemplary embodiment of this disclosure.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Industrial control computer; 2. Aviation cable core resistance measurement host; 3. Test cable; 4. Aviation cable under test; 5. Input board; 6. Output board; 7. Serial communication module; 8. Standard keyboard, video and mouse switcher. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] In a specific embodiment provided in the first aspect of this disclosure, a general-purpose aviation cable testing device is provided, with reference to... Figures 1 to 3As shown, this general-purpose aviation cable testing equipment constitutes a complete measurement system, including: an industrial control computer 1, an aviation cable core resistance measurement host 2, test cables 3, and an aviation cable qualification self-judgment system. The aviation cable core resistance measurement host 2 includes a power supply module, an output board 6, an input board 5, and a power-on indicator light. The aviation cable qualification self-judgment system includes a serial communication module 7 and a qualification self-judgment module. The industrial control computer 1 is connected to the aviation cable core resistance measurement host 2 via the serial communication module 7. The qualification self-judgment module is integrated into the industrial control computer 1. The power supply module powers the industrial control computer 1 and the aviation cable core resistance measurement host 2. The host 2 provides a power supply, and the power-on indicator light is set on the aviation cable core resistance measurement host 2 to display the power status of the aviation cable core resistance measurement host 2; one or more ends of the aviation cable 4 under test are respectively connected to the corresponding connectors of the test cable 3, the input end of the test cable 3 is connected to the input board 5, and the output end of the test cable 3 is connected to the output board 6. The output board 6 outputs a constant voltage source with a preset voltage value to the test cable 3. The input board 5 acquires the voltage signal through the AD acquisition module and transmits the data to the qualification self-judgment module through the serial communication module 7. Then, the qualification self-judgment module calculates the resistance value and judges the cable quality.

[0041] For example, the aviation cable core resistance measuring host 2, as a measurement execution unit, includes a power supply module, an output board 6, an input board 5, and a power-on indicator light. The power supply module provides a stable and reliable DC power supply for the entire system, specifically providing operating power for the industrial control computer 1 and the measuring host itself. The power-on indicator light is directly installed on the measuring host panel to display the power on / off status of the host in real time, providing intuitive safety instructions for equipment operation.

[0042] The aviation cable qualification self-judgment system is the intelligent brain of the equipment, consisting of a hardware-level serial communication module 7 and a software-level qualification self-judgment module. The industrial control computer 1 establishes a bidirectional data communication link with the aviation cable core resistance measurement host 2 via the serial communication module 7 (such as RS232 or RS485). The qualification self-judgment module is integrated into the operating system of the industrial control computer 1 as a software program, responsible for data processing, logical judgment, and human-computer interaction.

[0043] In actual connection, one or more connectors of the aviation cable under test 4 are first connected to the corresponding connector of the test cable 3. The input end of the test cable 3 is connected to the input board 5 of the measurement host, and the output end is connected to the output board 6, thus forming a complete signal path.

[0044] Through the above technical solution, the power supply module provides a stable and reliable working power supply for the entire equipment system. The power-on indicator light displays the power status of the measuring host in real time, providing a basic guarantee for the safe operation of the equipment. The output board 6 outputs a constant voltage source with a preset voltage value, which is applied to the aviation cable 4 under test through the test cable 3. At the same time, the input board 5 collects the voltage signal through the AD acquisition module. Meanwhile, the industrial control computer 1 establishes a reliable data transmission channel with the aviation cable core resistance measuring host 2 through the serial communication module 7, and transmits the collected voltage signal to the qualification self-judgment module integrated in the industrial control computer 1. The qualification self-judgment module can not only accurately calculate the cable resistance value based on the collected voltage signal, but also automatically judge the cable quality according to the preset standard. Specifically, firstly, through the cooperation of the AD acquisition module and the pass / fail self-judgment module, the resistance measurement accuracy reaches the 5mΩ level, far exceeding the measurement accuracy of traditional multimeters; secondly, the collaborative work of output board 6 and input board 5, combined with the analysis and judgment of the pass / fail self-judgment module, can automatically detect multiple states such as normal, abnormal, short circuit, and open circuit in one go; finally, the integrated design of industrial control computer 1 and pass / fail self-judgment module enables the equipment to flexibly set multi-level quality judgment thresholds according to different application scenarios, greatly improving the versatility and intelligence level of the equipment.

[0045] In some embodiments, the operating principle of this disclosure is based on high-precision resistance measurement and differential analysis. Output board 6 outputs a stable constant voltage source with a preset voltage value (typically DC 3.3V). This constant voltage source first flows through a high-precision resistor (10Ω, 0.1% accuracy, 5PPM temperature coefficient). For example... Figure 3 As shown, at the output node of the high-precision resistor, the current is split into two paths in parallel: the end of the first path is directly connected to the input of the high-resistivity AD acquisition module (16-bit resolution) to accurately acquire the voltage drop (V1) across the high-precision resistor; the end of the second path flows to the tested aviation cable 4 through the test cable 3, forming a complete measurement loop.

[0046] The measurement process employs a core-by-core scanning method. When measuring the first core of the tested aviation cable 4, the system controls the closure of the first output relay, applying a constant voltage source to that core. Similarly, when measuring other cores, the corresponding output relays are closed sequentially. For each core, the system reads the voltage value V1 measured by the AD acquisition module, combines it with the known constant voltage source voltage V2 and the high-precision resistor value R1, and calculates the loop current I1 = (V2 - V1) / R1 according to Ohm's law. Then, based on I1 and V1, the total resistance R2 of the test cable 3 and the tested aviation cable 4 is calculated. To eliminate the error introduced by the impedance of the test cable 3 itself, the system pre-measures the resistance R3 of a self-test cable with the exact same specifications as the test cable 3. Finally, the true resistance R4 of the tested aviation cable 4 is calculated using the differential formula R4 = R2 - R3. This method ensures a measurement accuracy within 5mΩ.

[0047] Meanwhile, another core function of this device is automatic line sequence detection. The system controls output board 6 to sequentially close each output channel, while input board 5 simultaneously scans and collects the status of all input channels. By comparing the output channel number with the input channel number of the received signal, the system can automatically determine the line sequence status: matching numbers indicate correctness; mismatching numbers indicate error; one output corresponding to multiple inputs indicates a short circuit; no input signal after output indicates an open circuit.

[0048] The core of the self-assessment module for pass / fail quality lies in its intelligent evaluation algorithm. This module compares the calculated resistance value R4 of the cable under test with the preset resistance value R5 of the corresponding wire core's factory specification, and automatically determines the quality level based on the absolute value of the difference |R4-R5|. The specific judgment criteria are: a difference within 0-50mΩ is excellent; within 50-100mΩ is good; and greater than 100mΩ is poor. Furthermore, this module allows users to flexibly set different judgment thresholds (e.g., 50mΩ, 100mΩ, 300mΩ, 500mΩ) according to actual application scenarios (such as airborne temperature sensing cables, missile-borne power supply cables, communication cables, or ground support cables), greatly improving the equipment's versatility and practicality.

[0049] For example, to improve the integration and operability of the equipment, the entire system is typically installed in a standard 19-inch rack. This standard rack provides robust mounting support and a good electromagnetic shielding environment for components such as the industrial control computer 1, the measurement host, and the standard keyboard video mouse switch 8 (KVM). Through the KVM switch, operators can easily centrally control multiple industrial control computers 1.

[0050] In a second aspect of this disclosure, a general-purpose aviation cable testing method is provided, comprising the following steps:

[0051] The output board 6 controls the output of constant voltage sources to each core of the aviation cable 4 under test in sequence, and the corresponding voltage signals are acquired through the input board 5 and the AD acquisition module.

[0052] Based on the acquired voltage signal, the resistance value of the tested aviation cable 4 is calculated by the qualification self-judgment module, specifically including:

[0053] Read the voltage value V1 acquired by the AD acquisition module;

[0054] Based on the known constant voltage source voltage V2 and high-precision resistor R1, calculate the current I1 = (V2 - V1) / R1;

[0055] Calculate the total resistance R2 of test cable 3 and tested aviation cable 4 based on I1 and V1;

[0056] By using the self-test cable resistance R3, the resistance of the tested aviation cable 4, R4 = R2 - R3, is calculated.

[0057] Meanwhile, the self-assessment module compares the calculated resistance value R4 with the preset factory specification resistance value R5, and determines the wire core quality level based on the difference.

[0058] When 0mΩ < |R4-R5| < 50mΩ, the wire core quality is considered excellent.

[0059] When 50mΩ < |R4-R5| < 100mΩ, the wire core quality is judged to be good;

[0060] When |R4-R5|>100mΩ, the wire core quality is considered poor.

[0061] R5 represents the factory-specified resistance value of the corresponding wire core.

[0062] The general aviation cable testing method provided in the second aspect of this disclosure achieves significant comprehensive benefits through the synergistic effect of each step. This method controls the output board 6 to sequentially output constant voltage sources to each core of the aviation cable 4 under test, and simultaneously acquires voltage signals using the input board 5 and a high-resistivity AD acquisition module, laying a data foundation for high-precision measurement. Subsequently, the pass / fail self-judgment module, based on the acquired voltage signals, calculates the cable resistance using a differential calculation method (specifically, reading V1, combining V2 and R1 to calculate I1 = (V2 - V1) / R1, then obtaining R2), and finally, by introducing the self-test cable resistance value R3, calculates the precise cable resistance value. The method (R4 = R2 - R3) improves measurement accuracy to the 5mΩ level, fundamentally solving the problem of insufficient measurement accuracy in traditional multimeters. Building upon this, the method further intelligently compares the calculated resistance value R4 with the preset factory specification resistance value R5, automatically determining the core quality level (excellent, good, poor) based on the difference range of |R4-R5|. In the line sequence detection step, by coordinating the comparison of the output and input channel states, it automatically completes the judgment of normal, abnormal, short circuit, and open circuit in one go, thus efficiently integrating resistance measurement, quality evaluation, and line sequence detection into a continuous automated process. This not only greatly improves detection efficiency and completely changes the inefficient traditional manual core-by-core measurement mode, but also ensures the consistency and reliability of the results through intelligent judgment by software algorithms. Furthermore, the method supports flexible setting of judgment thresholds according to different grades of aviation cables (such as airborne and missile-borne), giving it excellent versatility and adaptability. Ultimately, it achieves a technological leap from "low precision, low efficiency, semi-manual" to "high precision, fully automatic, and intelligent" in aviation cable electrical performance testing.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A general-purpose aviation cable testing device, characterized in that, include: Industrial control computer (1), aviation cable core resistance measurement host (2), test cable (3) and aviation cable qualification self-judgment system; The aviation cable core resistance measurement host (2) includes a power supply module, an output board (6), an input board (5), and a power-on indicator light; The aviation cable qualification self-judgment system includes a serial communication module (7) and a qualification self-judgment module. The industrial control computer (1) is connected to the aviation cable core resistance measurement host (2) through the serial communication module (7). The qualification self-judgment module is integrated in the industrial control computer (1). The power supply module provides working power to the industrial control computer (1) and the aviation cable core resistance measurement host (2). The power-on indicator is set on the aviation cable core resistance measurement host (2) to display the power status of the aviation cable core resistance measurement host (2). One or more connectors of the aviation cable under test (4) are respectively connected to the corresponding connectors of the test cable (3). The input end of the test cable (3) is connected to the input board (5), and the output end of the test cable (3) is connected to the output board (6). The output board (6) outputs a constant voltage source with a preset voltage value to the test cable (3). The input board (5) acquires the voltage signal through the AD acquisition module and transmits the data to the qualification self-judgment module through the serial communication module (7). Then, the qualification self-judgment module calculates the resistance value and judges the cable quality.

2. The general-purpose aviation cable testing equipment according to claim 1, characterized in that, It also includes standard cabinets and standard keyboard-video-mouse switchers (8); The standard cabinet is used to house the standard keyboard video mouse switcher (8), the industrial control computer (1), and the aviation cable core resistance measurement host (2), and provides installation support and electromagnetic shielding environment.

3. The general-purpose aviation cable testing equipment according to claim 2, characterized in that: The standard keyboard-video-mouse switcher (8) is connected to the industrial control computer (1) and is used to switch and control the keyboard, video and mouse signals of the industrial control computer (1).

4. The general-purpose aviation cable testing equipment according to claim 1, characterized in that: The constant voltage source output by the output board (6) is connected in parallel at the output node of the high-precision resistor after passing through a high-precision resistor to split into a first path and a second path. The end of the first path is connected to the input terminal of the AD acquisition module to acquire the voltage signal across the high-precision resistor; the end of the second path is connected to the aviation cable under test (4) through the test cable (3) to form a complete measurement loop; the loop current flowing through the aviation cable under test (4) is calculated by the voltage signal acquired by the AD acquisition module, and then the resistance value of the aviation cable under test (4) is calculated; the AD acquisition module is a high-resistivity AD acquisition module.

5. A general-purpose aviation cable testing device according to claim 4, characterized in that: When measuring the first line core of the aviation cable under test (4), the first output relay is closed, and the first constant voltage source of the output board (6) is output to the test cable (3), and then output to the first line core of the aviation cable under test (4); When measuring other cores of the aviation cable under test (4), close the corresponding output relays one by one, and output the constant voltage source of the output board (6) to the test cable (3), and then output it to the corresponding core of the aviation cable under test (4).

6. The general-purpose aviation cable testing equipment according to claim 5, characterized in that: The qualification self-judgment module is configured to judge and output the quality level of the wire core of the tested aviation cable (4) based on the absolute value of the difference between the factory specification resistance value R5 of different wire cores and the calculated resistance value R4 of the tested aviation cable (4) |R4-R5|.

7. The universal aviation cable testing equipment according to claim 1, characterized in that: The general-purpose aviation cable testing equipment controls the output board (6) to close each output channel in sequence and collects the status of each channel synchronously through the input board (5) to realize the line sequence detection of the aviation cable (4) under test.

8. A general-purpose aviation cable testing method based on the device described in any one of claims 1-7, characterized in that, Includes the following steps: The output board (6) is controlled to output constant voltage sources to each core of the tested aviation cable (4) in sequence, and the corresponding voltage signals are acquired through the input board (5) and the AD acquisition module. Based on the collected voltage signal, the resistance value of the tested aviation cable (4) is calculated by the qualification self-judgment module; The self-assessment module for qualification compares the calculated resistance value with the preset factory specification resistance value, and determines the quality grade of the wire core based on the difference.

9. A general-purpose aviation cable testing method according to claim 8, characterized in that, The resistance value of the tested aviation cable (4) is calculated by the qualification self-judgment module, including: Read the voltage value V1 acquired by the AD acquisition module, calculate the current I1 = (V2 - V1) / R1 based on the known constant voltage source voltage V2 and high-precision resistor R1, calculate the total resistance R2 of the test cable (3) and the aviation cable under test (4) based on I1 and V1, and calculate the resistance R4 = R2 - R3 of the aviation cable under test (4) by checking the cable resistance R3.

10. A general-purpose aviation cable testing method according to claim 9, characterized in that, The method of determining the wire core quality grade based on the difference is as follows: When 0mΩ < |R4-R5| < 50mΩ, the wire core quality is considered excellent. When 50mΩ < |R4-R5| < 100mΩ, the wire core quality is judged to be good; When |R4-R5|>100mΩ, the wire core quality is considered poor. R5 represents the factory-specified resistance value of the corresponding wire core.

Images