Power terminal insulating material aging detection device

Abstract

The invention discloses a power terminal insulating material aging detection device, and belongs to the technical field of material detection, aging tests are performed on multiple groups of cables by simulating different high-temperature environments, the upper end and the lower end of each group of cables are respectively limited through a positioning assembly, and after tests are performed at different aging temperatures for the same aging time, the test is completed. A leakage coefficient and a static aging coefficient of a cable are respectively acquired through a leakage current tester and an image acquisition device to assess changes of electrical performance and a physical state of a cable insulation material, the changes are used as a basis for grading the aging degree of the cable, and then the cable is driven by a dynamometer to slowly stretch upwards in the vertical direction one by one to achieve the aging degree of the cable. In the process, the tensile strength data of the cable is acquired through the dynamometer, the dynamic apparent image of the cable in the tensile process is acquired through the image acquisition equipment, and the dynamic image information is combined with the tensile mechanical property data, so that the comprehensive performance of the cable at different aging degrees can be evaluated more comprehensively.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material detection, more particularly to an aging detection device for insulation material of power terminal. BACKGROUND

[0002] With the increase of power demand, the stability and service life of power cable terminal in various harsh environments are increasingly concerned, and the insulation material of cable terminal is one of the main factors affecting the performance and service life of cable material.

[0003] According to the search, patent publication No. CN119470232A discloses an "insulation material detection device for power cable and thermal oxidation aging detection method", which can evaluate the aging characteristics of cable material in a short time through aging test under short-time high temperature and oxygen environment, but it is still impossible to master the aging law of cable insulation material under different temperature environment conditions. In addition, only the aging degree of cable material is detected from the static level, and the performance of the cable after aging is not detected from the dynamic level, so it is difficult to more comprehensively evaluate the comprehensive performance of the cable after aging. SUMMARY

[0004] The present application aims to solve the above technical problems and provide an aging detection device for insulation material of power terminal.

[0005] The purpose of the present application can be achieved by the following technical scheme: an aging detection device for insulation material of power terminal, comprising an aging box and an image acquisition box, the aging box is internally provided with a plurality of aging simulation spaces, each aging simulation space is provided with a pair of positioning groups for positioning the cable to be tested up and down, and the side of the aging box away from the image acquisition box is provided with a perforation for the cable to be tested to pass through outward in the up-down direction, the aging box is externally provided with a leakage current tester, the image acquisition box is internally provided with a plurality of image acquisition devices corresponding to the positions of the aging simulation spaces, the positioning group located below is fixed to the lower end of the aging simulation space, and the top of the aging box is provided with a dynamometer for driving the upper positioning group to move upward;

[0006] The bottom of the aging box is provided with a control panel connected with the leakage current tester, the image acquisition device and the dynamometer, the control panel is internally provided with a processor, an aging information acquisition unit, an aging grade evaluation module and an aging performance detection module, the processor marks the cable to be tested as a detection object, the aging information acquisition unit is used to obtain the leakage coefficient, static aging coefficient, dynamic aging coefficient and tensile strength coefficient of the detection object in the high-temperature aging simulation state, the leakage coefficient and static aging coefficient are sent to the aging grade evaluation module, and the dynamic aging coefficient and tensile strength coefficient are sent to the aging performance detection module;

[0007] The aging grade evaluation module divides the aging grade of the detection object according to the leakage coefficient and the static aging coefficient, and the aging performance detection module performs performance detection analysis on the detection objects of different grades according to the dynamic aging coefficient and the tensile strength coefficient.

[0008] Further, the positioning group comprises a limiting roller and a transverse plate connected by elastic belts at both ends of the limiting roller, a limiting seat arranged close to the limiting roller is fixed on the transverse plate, a limiting groove for limiting and extruding the plurality of cables to be tested is formed in the limiting seat, and the transverse plate is threadedly fixedly connected with the limiting roller through locking rods at both ends thereof.

[0009] Further, the upper and lower transverse plates are arranged away from each other, the upper transverse plate is fixed at the top end thereof with a guide cable penetrating through the top of the aging box and connected with the dynamometer, and the limiting roller is fixed at both ends thereof with a moving plate, and the opposite inner wall of the aging simulation space is provided with a sliding groove for the moving plate to slide up and down.

[0010] Further, a fixed partition plate is fixed on the upper end of the side of the image acquisition box facing the inside of the aging box, a movable partition plate slidingly connected with the bottom of the image acquisition box is sealingly connected to the bottom end of the fixed partition plate, and when the image acquisition work is not performed, the fixed partition plate and the movable partition plate are connected and installed to play a temperature insulation and sealing role on the image acquisition equipment in the image acquisition box, so as to prevent the high-temperature environment from affecting the image acquisition equipment.

[0011] Further, the process of obtaining the leakage coefficient and the static aging coefficient comprises: setting temperature intervals consistent with the number of detection objects, arranging the plurality of temperature intervals in order from small to large in the plurality of aging simulation spaces from left to right, arranging a plurality of detection objects in each aging simulation space, and synchronously performing h aging test.

[0012] When the aging time ends, the plurality of image acquisition devices acquire images of the detection objects in the plurality of aging simulation spaces to obtain static apparent images, all pixel points of the static apparent images are obtained under the RGB color model, the R, G and B values of the pixel points are obtained by using the RGB model, then the average values of all R values, G values and B values are calculated, which are used as the RGB average values of different regions of the static apparent images, the pixel points corresponding to the RGB average values outside the preset RGB threshold interval are marked as aging pixel points, the ratio between the aging pixel points and the total pixel points is marked as the aging ratio, the average aging ratio in the same aging simulation space is obtained and marked as the static aging coefficient, the plurality of leakage current testers acquire leakage currents of the detection objects in the plurality of aging simulation spaces, and the average leakage current in the same aging simulation space is obtained and marked as the leakage coefficient.

[0013] Further, the judgment process of detecting the aging level of the detection object comprises: comparing the static aging coefficient and the leakage coefficient with preset coefficients respectively, when the static aging coefficient and the leakage coefficient are greater than the preset static aging coefficient threshold and the preset leakage coefficient threshold, marking the detection object as a first-level aging object, when the static aging coefficient and the leakage coefficient are less than the preset static aging coefficient threshold and the preset leakage coefficient threshold, marking the detection object as a third-level aging object, and marking the detection object as a second-level aging object in other cases.

[0014] Further, the acquisition process of the tensile strength coefficient and the dynamic aging coefficient comprises: driving the detection object to move slowly upwards along the vertical direction through a plurality of dynamometers, acquiring the tensile strength of the detection object, performing difference calculation on the tensile strength and a preset tensile strength threshold to obtain a strength fluctuation value, performing mean value calculation on the strength fluctuation values of a plurality of detection objects in the same aging simulation space to obtain the tensile strength coefficient.

[0015] The image acquisition device is used to acquire images of the detection object at preset interval times, to obtain dynamic apparent images of the detection object, to magnify the dynamic apparent images into pixel grid images and to perform gray scale changes, to acquire gray scale values of a plurality of dynamic apparent images of the same detection object, to form a set of the plurality of gray scale values, to perform difference calculation on the front and rear two gray scale values respectively to obtain a plurality of gray scale change values, and to mark the maximum gray scale change value as the dynamic aging coefficient.

[0016] Further, the process of the aging performance detection module for detecting and analyzing the performance of detection objects of different levels comprises: taking the temperature interval as the x-axis and the tensile strength coefficient as the y-axis to draw a mechanical performance change curve, and observing the change trend of the tensile strength coefficient of the aging objects of different levels with temperature.

[0017] Taking the temperature interval as the x-axis and the dynamic aging coefficient as the y-axis to draw an apparent performance change curve, and observing the change trend of the dynamic aging coefficient of the aging objects of different levels with temperature.

[0018] Compared with the prior art, the advantages of the present application are that:

[0019] 1、This scheme is through simulating different high temperature environment to carry out aging test to multiple groups of cables, the upper and lower ends of each group of cables are respectively positioned through the upper and lower distributed positioning assemblies, after the same aging time and different aging temperature test, the leakage coefficient and static aging coefficient of the cables are obtained through the leakage current tester and image acquisition equipment, so as to evaluate the change of electrical performance and physical state of cable insulation material, which is used as the basis for grading the aging degree of the cable, and then the multiple dynamometers drive the cable to stretch slowly along the vertical direction, in this process, the tensile strength data of the cable is obtained through the dynamometer, the dynamic apparent image of the cable in the stretching process is obtained through the image acquisition equipment, the dynamic image information is combined with the tensile mechanical property data, so that the comprehensive performance of the cable with different aging degrees can be more comprehensively evaluated.

[0020] 2、The dynamic apparent image is collected during the stretching process, the dynamic process of vertical stretching is used to capture the dynamic apparent image of the cable at different time, and the gray value of the dynamic apparent image is obtained, the aging degree of the cable in different temperature intervals is reflected by the gray value change, so as to evaluate the relationship between the surface damage and crack state of the cable and the aging degree, compared with the static observation, more information about the performance change of the cable can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front structure schematic diagram of the present application;

[0022] Figure 2 It is a back structure schematic diagram of the present application;

[0023] Figure 3 It is a schematic diagram of the internal structure of the aging box of the present application;

[0024] Figure 4 It is a structure schematic diagram of the positioning assembly of the present application;

[0025] Figure 5 It is a structure schematic diagram of the present application in which the cable to be tested is positioned on a pair of positioning assemblies;

[0026] Figure 6 It is a structure schematic diagram of the image acquisition box of the present application;

[0027] Figure 7 It is a structure schematic diagram of the present application in which the movable partition is pushed down to expose the image acquisition equipment;

[0028] Figure 8 It is a structure schematic diagram of the present application in which the leakage current tester and the image acquisition equipment are used to detect the static state of the cable to be tested;

[0029] Figure 9The structural schematic diagram of the application is used for detecting the cable to be detected in dynamic state by using the dynamometer and the image acquisition device.

[0030] Figure 10 The system program block diagram of the application.

[0031] Label explanation in the figure:

[0032] 1, aging box; 2, image acquisition box; 3, cable to be detected; 4, positioning assembly; 41, limiting roller; 42, cross plate; 43, limiting seat; 431, limiting groove; 44, elastic belt; 45, locking rod; 5, leakage current tester; 6, image acquisition device; 7, fixed partition; 8, movable partition; 9, dynamometer; 10, guide cable; 11, moving plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application; obviously, the described embodiments are only part of the embodiments of the application, but not all the embodiments; based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0034] Embodiment 1: For the problem that the traditional aging test detection cannot grasp the aging rule of the insulating material under different temperature environment conditions, and only the performance of the cable after aging is detected from the static level, it is difficult to more comprehensively evaluate the comprehensive performance of the cable after aging, the following technical solutions are proposed:

[0035] The application discloses an aging detection device for power terminal insulating material, please refer to Figures 1-3 , including an aging box 1 and an image acquisition box 2 installed at the port of the aging box 1, a plurality of aging simulation spaces are arranged in the aging box 1, a pair of positioning assemblies 4 for positioning and installing the cable to be detected 3 upwards and downwards are arranged in each aging simulation space, and a plurality of through holes for the cable to be detected 3 to pass outward are arranged on the aging box 1 away from the image acquisition box 2 in the upward and downward directions.

[0036] A leakage current tester 5 for collecting the leakage current of the cable to be detected 3 is installed outside the aging box 1, a plurality of image acquisition devices 6 corresponding to the positions of the aging simulation spaces are distributed on the end wall of the image acquisition box 2, the positioning assembly 4 located below is fixedly installed at the lower end of the aging simulation space, and a dynamometer 9 for driving the positioning assembly 4 above to move upwards is installed at the top end of the aging box 1.

[0037] Please refer to Figures 3-5, the positioning group 4 comprises a limiting roller 41 and a transverse plate 42 connected at both ends of the limiting roller 41 through an elastic belt 44, the transverse plate 42 is fixed with a limiting seat 43 arranged close to the limiting roller 41, the limiting seat 43 is provided with a limiting groove 431 for limiting and extruding a plurality of cables to be tested 3, the transverse plate 42 is threadedly and fixedly connected between both ends and the limiting roller 41, and the upper and lower transverse plates 42 are arranged away from each other, the top end of the upper transverse plate 42 is fixed with a guide cable 10 penetrating through the top of the aging box 1 and connected with the dynamometer 9, and the left and right ends of the limiting roller 41 are both fixed with a moving plate 11, and the relative inner wall of the aging simulation space is provided with a sliding groove for the moving plate 11 to slide up and down;

[0038] When the cable to be tested is installed, the image acquisition box 2 is detached from the aging box 1, one end of the cable to be tested is inserted from the hole, the transverse plate 42 is stretched outward, the gap between the transverse plate 42 and the limiting roller 41 is exposed, so that the cable to be tested passes through the 421 on the transverse plate 42, the transverse plate 42 is relaxed, the transverse plate 42 and the limiting roller 41 are preliminarily positioned to limit the cable to be tested, one end of the cable to be tested is extended upward or downward and is synchronously positioned by another positioning group 4, the cable to be tested passes through another hole, the cable to be tested is arranged between the two limiting rollers 41, and then the 46 is threadedly and fixedly installed to stably position the cable to be tested. At this time, both ends of the cable to be tested are exposed outside the aging box 1, and the part inside the aging box 1 is the simulated aging part.

[0039] Please refer to Figure 3 Each aging simulation space corresponds to a temperature interval, and each aging simulation space is configured with a plurality of cables to be tested 3. The same aging time is used to simulate different high-temperature environments for different aging simulation spaces. After the aging time is over, please refer to Figures 7-9 The movable partition plate 8 is driven downward, the bottom end of the movable partition plate 8 is connected by the lifting mechanism, the movable partition plate 8 is away from the fixed partition plate 7, the image acquisition device 6 is exposed, the image acquisition device 6 photographs the image of the cable to be tested 3, at the same time, the leakage current tester 5 is connected with the conductor and the insulating part of the cable to be tested 3 respectively, the leakage current of the cable to be tested 3 is detected by the leakage current tester 5, the state of the cable to be tested 3 before and after stretching is collected by the image acquisition device, and the change of the electrical performance and the physical appearance of the cable insulating material is evaluated by the cooperation of the leakage current tester 5 and the image acquisition device 6.

[0040] Embodiment 2: Based on the embodiment 1, a control panel connected with the leakage current tester 5, the image acquisition device 6 and the dynamometer 9 is installed at the bottom of the aging box 1, please refer to Figure 10 The control panel is internally provided with a processor, an aging information acquisition unit, an aging grade evaluation module and an aging performance detection module.

[0041] The processor marks the to-be-tested cable 3 to be subjected to the aging analysis as a detection object, and the aging information acquisition unit is configured to acquire a leakage coefficient, a static aging coefficient and a dynamic aging coefficient of the detection object in a high-temperature aging simulation state. The aging information acquisition unit sends the leakage coefficient and the static aging coefficient to the aging grade evaluation module via the processor, and sends the dynamic aging coefficient to the aging performance detection module via the processor;

[0042] The leakage coefficient and the static aging coefficient are acquired in the following manner: a plurality of temperature intervals consistent with the number of detection objects are set, and the plurality of temperature intervals are sequentially arranged from left to right in the plurality of aging simulation spaces in ascending order. A plurality of detection objects are arranged in each aging simulation space, and the aging test is simultaneously performed for 60 hours.

[0043] When the aging time ends, refer to Figure 8 The static apparent image is obtained by image acquisition of the detection objects in the plurality of aging simulation spaces via the plurality of image acquisition devices 6. In the RGB color model, all pixel points of the static apparent image are acquired, and the R, G and B values of the pixel points are acquired via the RGB model. Then, the average values of all R values, G values and B values are calculated, respectively, as the RGB average values of different regions of the static apparent image. The pixel points corresponding to the RGB average values outside the preset RGB threshold interval are marked as aging pixel points. The ratio between the aging pixel points and the total pixel points is marked as an aging proportion value. The average aging proportion value in the same aging simulation space is acquired and marked as the static aging coefficient. The greater the static aging coefficient, the greater the color feature of the pixel points different from the original cable color in the static apparent image, and the greater the aging degree.

[0044] The leakage current of the detection objects in the plurality of aging simulation spaces is acquired via the plurality of leakage current testers 5. The average leakage current in the same aging simulation space is acquired and marked as the leakage coefficient. In the cable aging process, the insulation performance gradually decreases, and the leakage current correspondingly increases. Therefore, the greater the leakage coefficient, the greater the aging degree of the cable insulation layer.

[0045] The tensile strength coefficient and the dynamic aging coefficient are acquired in the following manner: refer to Figure 9 The detection objects are driven to move upward in the vertical direction at a slow speed via the plurality of dynamometers 9. The tensile strength of the detection objects is acquired. The tensile strength is subjected to difference calculation with a preset tensile strength threshold value to obtain a strength fluctuation value. The strength fluctuation values of the plurality of detection objects in the same aging simulation space are subjected to average calculation to obtain the tensile strength coefficient. The greater the tensile strength coefficient, the greater the fluctuation between the tensile strength detected before the cable aging and the tensile strength, the worse the tensile effect, and the greater the aging degree of the cable.

[0046] The image acquisition device 6 is used to acquire images of the detection object at preset intervals, to obtain dynamic apparent images of the detection object, to magnify the dynamic apparent images into pixel grid images and to change the grayscale, to obtain grayscale values of multiple dynamic apparent images of the same detection object, to form a set of the multiple grayscale values, to respectively calculate the difference between the front and rear two grayscale values, to obtain multiple grayscale change values, and to mark the maximum grayscale change value as a dynamic aging coefficient;

[0047] During the stretching process, the normal cable pixel grid pattern will change regularly with the deformation of the cable. After the cable is subjected to high-temperature aging treatment, the cable is prone to delamination or cracking during the stretching process, and the pixel grid pattern will have mutations or interruptions at the corresponding positions. After the grayscale of the image during the stretching process is changed, the grayscale difference at the delamination and cracking positions can be more clearly observed. By comparing the grayscale images obtained by gradual stretching, the development process of cable aging can be analyzed, that is, the contrast at the delamination or cracking positions will gradually increase as the stretching proceeds, and the greater the dynamic aging coefficient, the more serious the aging degree.

[0048] After receiving the leakage coefficient and the static aging coefficient, the aging grade evaluation module divides the aging grade of the detection object according to the leakage coefficient and the static aging coefficient. The specific process includes: comparing the static aging coefficient and the leakage coefficient with the preset coefficients respectively, when the static aging coefficient and the leakage coefficient are greater than the preset static aging coefficient threshold and the preset leakage coefficient threshold, marking the detection object as a first-grade aging object, when the static aging coefficient and the leakage coefficient are less than the preset static aging coefficient threshold and the preset leakage coefficient threshold, marking the detection object as a third-grade aging object, and marking the detection object as a second-grade aging object in other cases. Different temperature environments cause the detection object to be divided into different aging grades, reflecting the change in the aging degree of the cable caused by temperature change.

[0049] After receiving the dynamic aging coefficient and the tensile strength coefficient, the aging performance detection module performs performance detection analysis on detection objects of different grades. The specific process is as follows:

[0050] The mechanical property change curve is plotted with the temperature interval as the x-axis and the tensile strength coefficient as the y-axis to observe the change trend of the tensile strength coefficient of the aging objects of different grades with temperature. The apparent property change curve is plotted with the temperature interval as the x-axis and the dynamic aging coefficient as the y-axis to observe the change trend of the dynamic aging coefficient of the aging objects of different grades with temperature. The greater the tensile strength coefficient, the greater the fluctuation between the tensile strength before the cable is aged and the tensile strength after the cable is aged, the worse the stretching effect, and the greater the aging degree of the cable.

[0051] By comparing the gray images obtained by gradual stretching, the development process of cable aging can be analyzed, that is, the contrast of the delamination or cracking will gradually increase as the stretching proceeds, and the larger the dynamic aging coefficient is, the more serious the aging degree is. By combining the dynamic image information with the tensile mechanical property data, the comprehensive performance of the cable with different aging degrees can be more comprehensively evaluated.

[0052] As shown above: a plurality of groups of cables are subjected to aging test by simulating different high-temperature environments, the upper and lower ends of each group of cables are limited by the upper and lower positioning groups 4, respectively, after the same aging time and different aging temperature test is performed, the leakage coefficient and the static aging coefficient of the cables are obtained by the leakage current tester 5 and the image acquisition device 6, respectively, to evaluate the changes of the electrical performance and the physical state of the cable insulation material, which is used as the basis for grading the aging degree of the cable;

[0053] Then the plurality of force gauges 9 drive the cables to slowly stretch upward along the vertical direction, in this process, the tensile strength data of the cables are obtained by the force gauges 9, and the dynamic apparent images of the cables in the stretching process are obtained by the image acquisition device 6, the dynamic apparent images in the stretching process are collected, the dynamic process of vertical stretching is used to capture the dynamic apparent images of the cables at different times, and the gray values of the dynamic apparent images are obtained, the aging degree of the cables in different temperature intervals is reflected by the gray value change, so as to evaluate the relationship between the surface damage and crack state of the cables and the aging degree, and by combining the dynamic image information with the tensile mechanical property data, the comprehensive performance of the cables with different aging degrees can be more comprehensively evaluated, and the deformation characteristics in the image can be used as a supplementary explanation of the change of the mechanical performance.

[0054] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical solution and the improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An electrical terminal insulating material aging detection device, comprising an aging box (1), an image acquisition box (2), characterized in that: The aging box (1) is internally provided with a plurality of aging simulation spaces, each of which is provided with a pair of positioning groups (4) for positioning the cables (3) to be tested up and down, and the aging box (1) is externally provided with a leakage current tester (5), and the image acquisition box (2) is internally provided with a plurality of image acquisition devices (6), and the lower positioning group (4) is fixedly installed at the top of the aging box (1) and is provided with a force gauge (9) for driving the upper positioning group (4) to move upward. The aging box (1) is provided with a control panel connected with the leakage current tester (5), the image acquisition device (6) and the force gauge (9), and the control panel is internally provided with a processor, an aging information acquisition unit, an aging grade evaluation module and an aging performance detection module, the processor marks the cables (3) to be tested as detection objects, the aging information acquisition unit is used for acquiring the leakage coefficient, the static aging coefficient, the dynamic aging coefficient and the tensile strength coefficient of the detection objects in the high-temperature aging simulation state, the leakage coefficient and the static aging coefficient are sent to the aging grade evaluation module through the processor, and the dynamic aging coefficient and the tensile strength coefficient are sent to the aging performance detection module through the processor. The aging grade evaluation module divides the aging grade of the detection objects according to the leakage coefficient and the static aging coefficient, and the aging performance detection module performs performance detection analysis on detection objects of different grades according to the dynamic aging coefficient and the tensile strength coefficient.

2. The apparatus for detecting aging of power terminal insulating material according to claim 1, characterized by: The positioning group (4) comprises a limiting roller (41) and a transverse plate (42) connected at both ends thereof through elastic belts (44), the transverse plate (42) is fixedly provided with a limiting seat (43) close to the limiting roller (41), the limiting seat (43) is provided with limiting grooves (431) for limiting and extruding a plurality of cables (3) to be tested, and the transverse plate (42) is threadedly fixedly connected with the limiting roller (41) through locking rods (45) at both ends thereof.

3. The apparatus for detecting the aging of the power terminal insulating material according to claim 1, characterized in that: The upper and lower transverse plates (42) are arranged away from each other, and the upper transverse plate (42) is fixedly provided with a guide rope (10) penetrating through the top of the aging box (1) and connected with the force gauge (9).

4. The apparatus for detecting the aging of the power terminal insulating material according to claim 1, characterized in that: The image acquisition box (2) is internally provided with a fixed partition plate (7) fixedly arranged at the upper end of one side of the image acquisition box (2), and the bottom end of the fixed partition plate (7) is sealingly connected with a movable partition plate (8) slidingly arranged at the bottom of the image acquisition box (2).

5. The apparatus for detecting the aging of power terminal insulating material according to claim 1, characterized in that: The acquisition process of the leakage coefficient and the static aging coefficient comprises the following steps: setting temperature intervals consistent with the number of detection objects, arranging a plurality of temperature intervals from small to large in order in a plurality of aging simulation spaces from left to right, arranging a plurality of detection objects in the aging simulation spaces, and performing 60h of aging test. When the aging time ends, the static appearance image is obtained by image acquisition of the detection objects in the multiple aging simulation spaces through the multiple image acquisition devices (6), all pixel points of the static appearance image are obtained under the RGB color model, the R, G and B values of the pixel points are obtained by using the RGB model, then the average values of all R, G and B values are calculated respectively, which are used as the RGB average values of different regions of the static appearance image, the pixel points corresponding to the RGB average values outside the preset RGB threshold interval are marked as aging pixel points, the ratio between the aging pixel points and the total pixel points is marked as the aging ratio, the average aging ratio in the same aging simulation space is obtained and marked as the static aging coefficient, the average leakage current in the same aging simulation space is obtained by leakage current acquisition of the detection objects in the multiple aging simulation spaces through the multiple leakage current testers (5), and is marked as the leakage coefficient.

6. The apparatus for detecting the aging of the power terminal insulating material according to claim 5, characterized by: The judgment process of the aging grade of the detection object includes: comparing the static aging coefficient and the leakage coefficient with the preset coefficients respectively, and marking the detection object as a first-level aging object, a second-level aging object or a third-level aging object according to the comparison result.

7. A device for detecting the ageing of an electrical terminal insulating material according to claim 6, characterized in that: The acquisition process of the tensile strength coefficient and the dynamic aging coefficient includes: driving the detection object to move slowly upward along the vertical direction through the multiple dynamometers (9) one by one, acquiring the tensile strength of the detection object, performing difference calculation on the tensile strength and the preset tensile strength threshold to obtain the strength fluctuation value, performing mean value calculation on the strength fluctuation values of multiple detection objects in the same aging simulation space to obtain the tensile strength coefficient; The dynamic appearance image of the detection object is obtained by image acquisition of the detection object at preset interval time by using the image acquisition device (6), the dynamic appearance image is enlarged into a pixel grid image and the gray scale is changed, the gray scale values of multiple dynamic appearance images of the detection object are obtained, difference calculation is performed on the front and rear two gray scale values to obtain multiple gray scale change values, and the maximum gray scale change value is marked as the dynamic aging coefficient.

8. A device for detecting the ageing of an electrical terminal insulating material according to claim 7, characterized in that: The process that the aging performance detection module performs performance detection analysis on detection objects of different grades includes: drawing a mechanical property change curve with the temperature interval as the x-axis and the tensile strength coefficient as the y-axis, and observing the change trend of the tensile strength coefficient of the aging objects of different levels with temperature; The appearance performance change curve is drawn with the temperature interval as the x-axis and the dynamic aging coefficient as the y-axis, and the change trend of the dynamic aging coefficient of the aging objects of different levels with temperature is observed.

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