A dynamic testing device and method for cable durability in high-altitude environments

Abstract

The application relates to a high-altitude environment cable durability dynamic testing device and a testing method thereof. The testing device comprises a test cabin, a vibration simulation unit, a testing unit, a monitoring unit and a control unit. A plurality of cable switching boxes are arranged in the test cabin. The vibration simulation unit and the testing unit are arranged in the test cabin. The vibration simulation unit is provided with a vibration test table and a vibration assembly. The two ends of a cable to be tested are connected with the vibration assembly and the cable interface on the cable switching box respectively. Then, the testing unit is connected with the corresponding interface of the cable switching box to test the durability of the cable to be tested. The vibration condition of the vibration simulation unit, the physical state of the cable to be tested and the temperature and air pressure in the test cabin are monitored in real time through the monitoring unit. The control unit outputs control instructions to the vibration simulation unit, the testing unit and the monitoring unit to control the dynamic testing device to perform durability testing. The application has the characteristics of simple operation, high flexibility, short time consumption and accurate result.

Description

Technical Field

[0001] This invention belongs to the field of mechanical testing equipment technology, and in particular relates to a dynamic testing device and method for cable durability under high-altitude conditions. Background Technology

[0002] Cables are one of the most important pieces of equipment in power systems, and are widely used in production and daily life. Their vibration characteristics are a key factor affecting the stable operation of power systems. In recent years, the rapid development of fields such as aerospace has placed higher demands on the vibration resistance and serviceability of cables in harsh environments. Therefore, it is necessary to develop new cable testing devices and methods.

[0003] Existing cable durability testing devices mostly perform simple tests on the mechanical properties of cables in ground environments. They cannot effectively simulate the actual vibration state of cables under engine operating conditions, nor can they test the electrical performance of cables in real time in high-altitude environments.

[0004] Therefore, there is an urgent need for a testing device and method to test the electrical performance of cables in high-altitude environments, under actual plugging and working conditions. Summary of the Invention

[0005] To address the shortcomings of related technologies, this invention provides a dynamic cable durability testing device and method for high-altitude environments. It enables dynamic durability testing of electrical and mechanical properties (mainly vibration resistance) of cables in high-altitude environments, under actual plugging and working conditions. This can shorten the test cycle, save test costs, and improve test reliability, solving the technical problem that existing cable durability testing devices cannot accurately reflect the electrical performance of cables in high-altitude environments and the test results are inaccurate.

[0006] This invention provides a dynamic testing device for cable durability in high-altitude environments, comprising:

[0007] The test chamber is equipped with multiple cable junction boxes.

[0008] A vibration simulation unit is provided inside the test chamber. The vibration simulation unit has a vibration test bench and a vibration component. The vibration component is fixed on the vibration test bench. The vibration simulation unit simulates the vibration of an aero-engine under different operating conditions.

[0009] The test unit is located outside the test chamber. It tests the durability of the cable under test by connecting both ends of the cable under test to the cable interface on the vibration component and the cable adapter box, respectively, and then connecting the test unit to the corresponding interface of the cable adapter box.

[0010] A monitoring unit is installed inside the test chamber to monitor the vibration of the vibration simulation unit, the physical state of the cable under test, and the temperature and air pressure inside the test chamber in real time.

[0011] The control unit is electrically connected to the vibration simulation unit, the testing unit, and the monitoring unit, and controls the dynamic cable durability testing device in high-altitude environment to perform durability testing by outputting control commands to the vibration simulation unit, the testing unit, and the monitoring unit.

[0012] In some embodiments, the vibration component further includes:

[0013] Vibrating frame;

[0014] A cable interface board is fixed to the vibration frame, and the cable interface board is provided with a cable interface for connecting the cable to be tested.

[0015] In some embodiments, the plurality of cable adapter boxes further include a first cable adapter box and a second cable adapter box;

[0016] The first and second cable adapter boxes are provided with four types of interfaces, namely a cable interface, a voltage signal interface, a DC resistance test signal interface, and an insulation resistance test signal interface; the first and second cable adapter boxes are provided with a controller and a tap switch, which can individually control a certain type of input signal to be output to the cable under test through the output interface.

[0017] The first cable adapter box has a rotary motor on one side, and the main shaft of the rotary motor is connected to a grounding rod. The controller controls the rotation of the main shaft to drive the grounding rod to connect to the grounding electrode, which is used to discharge the cable to ground before testing the cable insulation resistance. The second cable adapter box does not have a rotary motor or a grounding electrode.

[0018] In some embodiments, the test unit further includes a DC resistance tester and an insulation resistance tester, the DC resistance tester and / or the insulation resistance tester being connected to the cable under test via a DC resistance test signal interface and / or an insulation resistance test signal interface on the cable adapter box.

[0019] In some embodiments, the monitoring unit further includes:

[0020] The camera is a low-temperature resistant camera, which is installed above the vibration simulation unit to monitor the conditions inside the test chamber and the physical state of the cable under test in real time.

[0021] An accelerometer is mounted on the vibration frame to determine whether the vibration of the vibration assembly meets the requirements.

[0022] A temperature sensor is installed inside the test chamber to monitor the temperature inside the test chamber in real time.

[0023] A pressure sensor is installed inside the test chamber to monitor the air pressure inside the test chamber in real time.

[0024] In some embodiments, the dynamic testing device for cable durability in high-altitude environments is further equipped with a data acquisition device. The data acquisition device is connected to the camera, acceleration sensor, temperature sensor, and air pressure sensor. The data acquisition device acquires the monitoring images inside the test chamber, the physical state of the cable under test, acceleration, temperature, and air pressure data measured by the camera, acceleration sensor, temperature sensor, and air pressure sensor.

[0025] In some embodiments, the dynamic cable durability testing device in high-altitude environments is further equipped with a signal generator. The output end of the signal generator is connected to the voltage signal interface on the cable adapter box. The signal generator generates a voltage signal with adjustable voltage and frequency and outputs the voltage signal to the cable under test through the voltage signal interface on the cable adapter box.

[0026] In some embodiments, the control unit further includes a test bench controller, a switch, and a host computer;

[0027] The input terminal of the test bench controller is connected to the switch, and the output terminal is connected to the vibration test bench.

[0028] The switch is electrically connected to the controller, data acquisition device, signal generator, DC resistance tester, and insulation resistance tester of the first and second cable junction boxes.

[0029] The host computer and the switch are connected by a wired electrical connection. The host computer has built-in control software. The host computer adjusts the vibration mode of the vibration test bench by outputting control commands to the vibration simulation unit, adjusts the temperature and pressure inside the test chamber by outputting control commands to the monitoring unit, adjusts the signal characteristics emitted by the signal generator by outputting control commands to the signal generator, and controls the tap changer and rotary motor by outputting control commands to the cable adapter box. The host computer receives and displays the monitoring screen inside the test chamber, the physical state of the cable under test, acceleration, temperature, and air pressure data transmitted by the data acquisition device.

[0030] This invention also provides a method for testing cable durability in high-altitude environments. This method utilizes the dynamic cable durability testing device for high-altitude environments described in any of the above embodiments, and includes the following steps:

[0031] Select a suitable cable interface board and fix the cable interface board on the vibration frame. Then fix the assembled vibration assembly on the vibration test bench.

[0032] Connect the cable to be tested to the cable interface of the first cable adapter box and / or the second cable adapter box to the cable interface board respectively. Connect the signal generator, DC resistance tester and insulation resistance tester to the corresponding interfaces of the first cable adapter box and / or the second cable adapter box respectively. Connect the signal generator, data acquisition device, DC resistance tester, insulation resistance tester and test bench controller to the switch. Connect the switch to the host computer.

[0033] The test chamber is sealed, and the camera, signal generator, host computer, and air supply unit are turned on. The cable under test is pre-cooled first, and after the specified time is reached, a voltage signal is applied, and the vibration test bench is turned on to conduct a durability test.

[0034] In some embodiments, the signal generator, DC resistance tester, and insulation resistance tester are respectively connected to the voltage signal interface, DC resistance test signal interface, and insulation resistance test signal interface of the first cable adapter box and / or the second cable adapter box.

[0035] The durability test includes the following steps:

[0036] During the test, the physical condition of the cable under test is monitored by a camera;

[0037] After the test, the DC resistance of the cable under test is measured first to obtain the measurement result. Then, the rotating motor of the first cable adapter box is controlled to connect the grounding rod to the grounding electrode to discharge the cable under test to the ground.

[0038] Measure the insulation resistance of the cable under test, compare it with the normal value, and record it;

[0039] Remove the cable to be tested and wait for its temperature to rise. Then check the insulation sheath of the cable to be tested for cracks and measure the shrinkage parameter of the insulation sheath.

[0040] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0041] 1. This invention provides a dynamic testing device for cable durability in high-altitude environments. By setting up a vibration simulation unit and a testing unit in the test chamber, the device uses a vibration test bench to simulate various vibration conditions, including the vibration generated when an aircraft engine is working. First, the two ends of the cable under test are connected to the vibration component in the vibration simulation unit and the cable interface on any cable adapter box, respectively. Then, the durability of the cable under test is measured by the testing unit. This testing device can dynamically test the electrical and mechanical properties (mainly vibration resistance) of cables in high-altitude environments, under actual plugging and working conditions. It can shorten the test cycle, save test costs, and improve test reliability.

[0042] 2. This invention provides a dynamic testing device for cable durability in a high-altitude environment. By setting up a monitoring unit, it can monitor the conditions inside the test chamber, the physical state of the cable under test, temperature, air pressure, and vibration of the vibration components in real time. This not only allows for real-time control of the environment inside the test chamber but also improves the accuracy of the test results.

[0043] 3. This invention provides a dynamic testing device for cable durability in a high-altitude environment. By setting up a control system to send control commands to different components, it can perform operations such as adjusting the vibration mode of the vibration test bench, adjusting the temperature and pressure in the test chamber, and adjusting the signal characteristics of the signal generator. It can also display the monitoring screen in the test chamber, the physical state of the cable under test, acceleration, temperature and air pressure data in real time. It has the characteristics of high automation, strong operational flexibility and shortened test cycle.

[0044] 4. The present invention provides a test method for a dynamic testing device for cable durability in high-altitude environments, which has the characteristics of simple operation, short time consumption, and accurate results. Attached Figure Description

[0045] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0046] Figure 1 This is a schematic diagram of the overall structure of the dynamic testing device for cable durability in a high-altitude environment provided in an embodiment of the present invention.

[0047] Figure 2 This is a schematic diagram of the test chamber and the vibration simulation unit and monitoring unit inside the test chamber provided in an embodiment of the present invention.

[0048] Figure 3 This is a side view of the test chamber and the vibration simulation unit and monitoring unit inside the test chamber provided in the embodiment of the present invention.

[0049] In the picture:

[0050] 1. Test chamber; 2. Vibration test bench; 3. Vibration frame; 4. Cable interface board; 5. First cable adapter box; 6. Second cable adapter box; 7. Grounding electrode; 8. Grounding rod; 9. Camera; 10. Accelerometer; 11. Temperature sensor; 12. Barometric pressure sensor; 13. DC resistance tester; 14. Insulation resistance tester; 15. Data acquisition equipment; 16. Signal generator; 17. Test bench controller; 18. Switch; 19. Host computer; 20. Cable interface; 21. Voltage signal interface; 22. DC resistance test signal interface; 23. Insulation resistance test signal interface. Detailed Implementation

[0051] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0052] In the description of this invention, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this invention.

[0053] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] This invention provides a dynamic testing device for cable durability in high-altitude environments, with attachments. Figure 1-3This document provides a schematic diagram of the overall structure of the test chamber, a structural schematic diagram of the vibration simulation unit and monitoring unit within the test chamber, and a side view of the test chamber and the vibration simulation unit and monitoring unit within the test chamber, according to embodiments of the present invention. (Reference) Figure 1-3 As shown, the dynamic testing device for cable durability in a high-altitude environment includes at least: a test chamber 1, a vibration simulation unit, a testing unit, a monitoring unit, and a control unit. The test chamber 1 is a high-altitude environment test chamber containing multiple cable junction boxes. The vibration simulation unit is located within the test chamber 1 and simulates various vibration conditions under actual connection and operation in a high-altitude environment. The vibration simulation unit has a vibration test bench 2 and vibration components. The vibration components are fixed to the vibration test bench 2, specifically using bolts and nuts for fixation. The vibration test bench 2 can simulate various vibration conditions, including those generated during the operation of an aircraft engine. The simulation unit simulates the vibration of an aircraft engine under different operating conditions. The test unit is located outside the test chamber 1. The two ends of the cable under test are connected to the vibration component and the cable interface on the cable adapter box, respectively. The test unit is then connected to the corresponding interface of the cable adapter box to test the durability of the cable under test. The monitoring unit is located inside the test chamber 1. The monitoring unit monitors the vibration of the vibration simulation unit, the physical state of the cable under test, and the temperature and air pressure inside the test chamber 1 in real time. The control unit is electrically connected to the vibration simulation unit, the test unit, and the monitoring unit. It outputs control commands to the vibration simulation unit, the test unit, and the monitoring unit to control the dynamic cable durability testing device under high-altitude environment to perform durability testing. The dynamic cable durability testing device provided by this invention uses the cable under test to connect the cable interface of a cable adapter box to a vibration component, then connects the test unit to the corresponding interface of the cable adapter box, and then connects each unit component to a control system. The control system issues control commands to control each unit component to perform durability testing. This testing device can dynamically measure the electrical and mechanical properties (mainly vibration resistance) of cables in high-altitude environments, under actual plug-in and working conditions, which can shorten the test cycle, save test costs, and improve test reliability. It should also be noted that the dynamic cable durability testing device provided by this invention is not limited to use in high-altitude environments. Those skilled in the art can apply this testing device to other scenarios (e.g., ground environments) according to actual needs, and these all fall within the protection scope of this invention.

[0056] Among them, reference appendix Figure 1-2The vibration assembly further includes: a vibration frame 3 and a cable interface plate 4; the vibration frame 3 is used to fix the cable interface plate 4; the cable interface plate 4 is fixed on the vibration frame 3, and the cable interface plate 4 can be fixed on the vibration frame 3 with bolts and nuts to simulate the position of the cable interface on the equipment as much as possible. The cable interface plate 4 is provided with a cable interface for connecting the cable to be tested, and the type of the cable interface plate 4 can be set according to the different types of the cable to be tested.

[0057] The plurality of cable adapter boxes further include a first cable adapter box 5 and a second cable adapter box 6; see attached document. Figure 3 The first cable adapter box 5 and the second cable adapter box 6 are provided with four different interfaces. These four interfaces are cable interface 20 (for connecting the cable under test), voltage signal interface 21 (for connecting the signal generator 16), DC resistance test signal interface 22 (for connecting the DC resistance tester 13), and insulation resistance test signal interface 23 (for connecting the insulation resistance tester 14). The first cable adapter box 5 and the second cable adapter box 6 are provided with a controller (not shown in the figure) and a tap switch (not shown in the figure), which can individually control the output of a certain type of input signal to the cable under test through the output interface.

[0058] Furthermore, a rotary motor (not shown in the figure) is provided on one side of the first cable adapter box 5. The main shaft of the rotary motor is connected to the grounding rod 8. The controller drives the grounding rod 8 to connect to the grounding electrode 7 by controlling the rotation of the main shaft, which is used to discharge the cable under test to ground before testing the insulation resistance of the cable. The second cable adapter box 6 does not have a rotary motor and a grounding electrode. All other components are the same as those of the first cable adapter box 5.

[0059] The test unit further includes a DC resistance tester 13 and an insulation resistance tester 14. The DC resistance tester 13 and / or the insulation resistance tester 14 are connected to the cable under test through the DC resistance test signal interface 22 and / or the insulation resistance test signal interface 23 on the cable adapter box (first cable adapter box 5 and / or second cable adapter box 6).

[0060] The monitoring unit further includes: a camera 9, an accelerometer 10, a temperature sensor 11, and a pressure sensor 12; the camera 9 is a low-temperature resistant camera, which is installed above the vibration simulation unit to monitor the conditions inside the test chamber 1 and the physical state of the cable under test in real time; the accelerometer 10 is installed on the vibration frame 3 to determine whether the vibration of the vibration component meets the requirements; the temperature sensor 11 is installed inside the test chamber 1 to monitor the temperature inside the test chamber 1 in real time; and the pressure sensor 12 is installed inside the test chamber 1 to monitor the pressure inside the test chamber 1 in real time.

[0061] The cable durability dynamic testing device in high-altitude environment is also equipped with a data acquisition device 15. The data acquisition device 15 is connected to a camera 9, an acceleration sensor 10, a temperature sensor 11, and a pressure sensor 12. The data acquisition device 15 collects the monitoring images inside the test chamber 1, the physical state of the cable under test, acceleration, temperature, and pressure data measured by the camera 9, acceleration sensor 10, temperature sensor 11, and pressure sensor 12.

[0062] Among them, the dynamic testing device for cable durability in high-altitude environment is also equipped with a signal generator 16. The output end of the signal generator 16 is connected to the voltage signal interface 21 on the cable adapter box. The signal generator 16 generates a voltage signal with adjustable voltage and frequency, and outputs the voltage signal to the cable under test through the voltage signal interface 16 on the cable adapter box.

[0063] The control unit further includes a test bench controller 17, a switch 18, and a host computer 19. The test bench controller 17 is located inside the test chamber 1. The input of the test bench controller 17 is connected to the switch 18, and the output is connected to the vibration test bench 2. The switch 18 is electrically connected to the controllers of the first cable adapter box 5 and the second cable adapter box 6, the data acquisition device 15, the signal generator 16, the DC resistance tester 13, and the insulation resistance tester 14. The host computer 18 is wired to the switch 19. The host computer 18 has built-in control software. The host computer 18 adjusts the vibration mode of the vibration test bench 2 by outputting control commands to the vibration simulation unit, adjusts the temperature and pressure inside the test chamber 1 by outputting control commands to the monitoring unit, adjusts the signal characteristics emitted by the signal generator 16 by outputting control commands to the signal generator 16, and controls the tap changer and the rotary motor by outputting control commands to the cable adapter box. The host computer 19 receives and displays the monitoring screen inside the test chamber 1, the physical state of the cable under test, acceleration, temperature, and air pressure data transmitted by the data acquisition device. The present invention relates to a dynamic testing device for cable durability in high-altitude environments. By connecting the cable under test to the cable interface 20 of the cable adapter box and the cable interface board 4, the signal generator 16, DC resistance tester 13, and insulation resistance tester 14 are respectively connected to the corresponding interfaces of the first cable adapter box 5 and / or the second cable adapter box 6. The components are connected to the switch 18, and the switch 18 is connected to the host computer 19. Thus, dynamic testing of the electrical and mechanical durability of the cable is achieved in a high-altitude environment, under actual plug-in and working conditions.

[0064] This invention also provides a method for testing cable durability in high-altitude environments using the dynamic testing device for cable durability in high-altitude environments listed in any of the above embodiments, comprising the following steps:

[0065] S1. Select a suitable cable interface board 4 and fix the cable interface board 4 on the vibration frame 3. Fix the assembled vibration assembly on the vibration test bench 2.

[0066] S2. Connect the cable to be tested to the cable interface 20 of the first cable adapter box 5 and / or the second cable adapter box 6 to the cable interface board 3 respectively. Connect the signal generator 16, DC resistance tester 13 and insulation resistance tester 14 to the corresponding interfaces of the first cable adapter box 5 and / or the second cable adapter box 6 respectively. Connect the signal generator 16, data acquisition device 15, DC resistance tester 13, insulation resistance tester 14 and test bench controller 17 to the switch 18. Connect the switch 18 to the host computer 19.

[0067] S3. In the closed test chamber 1, turn on the camera 9, signal generator 16, host computer 19, and air supply unit (not shown in the figure). First, pre-cool the cable under test. After reaching the specified time, apply the voltage signal and turn on the vibration test bench 2 to conduct the durability test.

[0068] In step S3 above, test chamber 1 uses an existing high-altitude environment test chamber. The high-altitude environment test chamber, together with the air supply and extraction unit, can simulate the high-altitude environment (e.g., temperature, air pressure, air flow, etc.) from sea level to a certain altitude. The environmental conditions are referenced to the international standard atmosphere. At the same time, the performance of the high-altitude chamber has been measured and calibrated to ensure the authenticity of the simulated high-altitude environment.

[0069] To further enhance the realism of the simulated high-altitude environment, the vibration amplitude and frequency of the vibration test bench 2 in this invention are referenced to the actual vibration conditions of the aero-engine collected during the experiment. The structure and weight of the vibration frame 3 are designed with reference to the actual conditions of the aero-engine. The cable interface plate 4 can be disassembled and its position adjusted according to the actual design of the aero-engine to simulate the cable installation state as closely as possible. In addition, the test unit of this invention can continuously measure multiple electrical properties without opening the compartment for disassembly and assembly, and can more accurately simulate the working conditions of cables in a high-altitude environment compared with conventional testing methods.

[0070] The signal generator 16, the DC resistance tester 13, and the insulation resistance tester 14 are respectively connected to the voltage signal interface 21, the DC resistance test signal interface 22, and the insulation resistance test signal interface 23 of the first cable adapter box 5 and / or the second cable adapter box 6.

[0071] Durability testing includes the following steps:

[0072] (1) During the test, the physical state of the cable under test is monitored by camera 9;

[0073] (2) After the test, first measure the DC resistance of the cable under test, obtain the measurement result, control the rotating motor of the first cable junction box 5 to connect the grounding rod 8 to the grounding electrode 7, and discharge the cable under test to the ground.

[0074] (3) Measure the insulation resistance of the cable under test, compare it with the normal value, and record it;

[0075] (4) Take out the cable to be tested, wait for its temperature to rise, check whether there are cracks in the insulation sheath of the cable to be tested, and use a reading microscope or projector to measure the shrinkage parameter of the insulation sheath.

[0076] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A high-altitude environment cable endurance dynamic testing device, characterized in that, The application relates to a high-altitude environment cable durability dynamic testing device. The device comprises a test cabin, a vibration simulation unit, a test unit, a monitoring unit and a control unit. The vibration simulation unit is arranged in the test cabin and comprises a vibration test table and a vibration assembly. The test unit is arranged outside the test cabin and is connected to the cable interface on the cable adapter box through the two ends of the cable to be tested. The monitoring unit is arranged in the test cabin and is used for monitoring the vibration of the vibration simulation unit, the physical state of the cable to be tested and the temperature and air pressure in the test cabin. The control unit is electrically connected to the vibration simulation unit, the test unit and the monitoring unit and controls the durability test of the high-altitude environment cable durability dynamic testing device through output control instructions.

2. The high-altitude environment dynamic test device for wire durability according to claim 1, wherein, The vibration assembly further comprises a vibration frame and a cable interface plate. The cable interface plate is fixed to the vibration frame and is provided with a cable interface for connecting the cable to be tested. The cable adapter box further comprises a first cable adapter box and a second cable adapter box.

3. The high-altitude environment dynamic test device for wire durability according to claim 1, wherein, The first cable adapter box and the second cable adapter box are provided with four interfaces, namely a cable interface, a voltage signal interface, a direct-current resistance test signal interface and an insulation resistance test signal interface. The first cable adapter box and the second cable adapter box are internally provided with a controller and a tapping switch, and a certain type of input signal can be output to the cable to be tested through the output interface. The first cable adapter box is provided with a rotating motor, the main shaft of the rotating motor is connected to a grounding rod, the controller controls the rotation of the main shaft to drive the grounding rod to be connected to a grounding electrode, and the cable is discharged to the ground before the insulation resistance of the cable is tested. The second cable adapter box is not provided with a rotating motor and a grounding electrode.

4. The high-altitude environment in-line cable endurance dynamic testing device according to claim 3, characterized in that, The test unit further comprises a direct-current resistance tester and an insulation resistance tester.

5. The high-altitude environment in-line cable endurance dynamic testing device according to claim 2, characterized in that, The monitoring unit further comprises a low-temperature-resistant camera, an acceleration sensor and a temperature sensor. The low-temperature-resistant camera is arranged above the vibration simulation unit and is used for monitoring the situation in the test cabin and the physical state of the cable to be tested. The acceleration sensor is installed on the vibration frame and is used for determining whether the vibration of the vibration assembly meets the requirements. The temperature sensor is arranged in the test cabin and is used for monitoring the temperature in the test cabin. An air pressure sensor is arranged in the test cabin to monitor the air pressure in the test cabin in real time.

6. The high-altitude environment in-line cable endurance dynamic testing device according to claim 5, characterized in that, The high-altitude environment cable durability dynamic testing device is further provided with a data acquisition device connected to the camera, acceleration sensor, temperature sensor and air pressure sensor, which acquires the monitoring picture in the test cabin, the physical state, acceleration, temperature and air pressure data of the cable to be tested measured by the camera, acceleration sensor, temperature sensor and air pressure sensor.

7. The high-altitude environment in-line cable endurance dynamic testing device according to claim 3, characterized in that, The high-altitude environment cable durability dynamic testing device is further provided with a signal generator, the output end of which is connected to the voltage signal interface on the cable adapter box, the signal generator generates voltage and frequency adjustable voltage signals, and outputs the voltage signals to the cable to be tested through the voltage signal interface on the cable adapter box.

8. The high-altitude environment in-line cable endurance dynamic testing device according to claim 7, characterized in that, The control unit further comprises a test bench controller, a switch and an upper computer; The input end of the test bench controller is connected to the switch, and the output end is connected to the vibration test bench. The switch is electrically connected to the controllers of the first cable adapter box and the second cable adapter box, the data acquisition device, the signal generator, the direct current resistance tester and the insulation resistance tester; The upper computer is connected to the switch by wired electrical connection, and the upper computer is built-in control software, the upper computer adjusts the vibration mode of the vibration test bench by outputting control instructions to the vibration simulation unit, adjusts the temperature and pressure in the test cabin by outputting control instructions to the monitoring unit, adjusts the signal characteristics of the signal generator by outputting control instructions to the signal generator, and controls the tap switch and the rotary motor by outputting control instructions to the cable adapter box; the upper computer receives and displays the monitoring picture in the test cabin, the physical state, acceleration, temperature and air pressure data of the cable to be tested transmitted by the data acquisition device.

9. A method for testing the durability of a wire in a high-altitude environment, characterized by, The high-altitude environment cable durability dynamic testing device is further provided with a data acquisition device connected to the camera, acceleration sensor, temperature sensor and air pressure sensor, which acquires the monitoring picture in the test cabin, the physical state, acceleration, temperature and air pressure data of the cable to be tested measured by the camera, acceleration sensor, temperature sensor and air pressure sensor. Select a suitable cable interface board and fix it on the vibration frame, and fix the assembled vibration assembly on the vibration test bench; Connect the cable interface of the first cable adapter box and / or the second cable adapter box to the cable interface board, connect the signal generator, direct current resistance tester and insulation resistance tester to the corresponding interfaces of the first cable adapter box and / or the second cable adapter box, and connect the signal generator, data acquisition device, direct current resistance tester, insulation resistance tester, test bench controller to the switch, and connect the switch to the upper computer; Close the test cabin, turn on the camera, signal generator, upper computer and air supply unit, pre-cool the cable to be tested, load voltage signals after a specified time, and start the vibration test bench for durability test.

10. The method of claim 9, wherein the method further comprises: The signal generator, the direct current resistance tester and the insulation resistance tester are respectively connected to the voltage signal interface, the direct current resistance test signal interface and the insulation resistance test signal interface of the first cable adapter box and / or the second cable adapter box; The durability test comprises the following steps: During the test, the physical state of the cable under test is monitored by a camera; After the test, the direct current resistance of the cable under test is first measured to obtain a measurement result, the rotating motor of the first cable adapter box is controlled to lap the grounding rod to the grounding electrode, and the cable under test is discharged to the ground; The insulation resistance of the cable under test is measured and compared with a normal value, and the result is recorded; The cable under test is taken out, and after the temperature of the cable under test rises, it is checked whether the insulation sheath of the cable under test has cracks, and the shrinkage parameter of the insulation sheath is measured.

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