A full-automatic cable inner shield resistivity testing system and testing method

Abstract

The application discloses a kind of full-automatic cable inner shield resistivity test system, it is related to material test technical field, especially it is a kind of full-automatic cable inner shield resistivity test system and test method, it includes: high temperature test box, resistivity tester, camera and host computer;High temperature test box is built-in test mechanism, test mechanism includes material changing mechanism and pressing mechanism;Material changing mechanism includes material changing table;Material changing table includes test cabin and a plurality of to be measured cabin, to be measured cabin is used to place box, box is used to place test sample;Material changing mechanism is used to push box in test cabin into to be measured cabin;Pressing mechanism includes a plurality of test electrodes, it is connected with resistivity tester, for testing test sample, can realize the continuous test to multiple test samples;Host computer acquires the image of resistance value displayed by resistivity tester through camera, and carries out identification, can acquire measurement result data in real time;Not only eliminate the trouble of manual frequent replacement test sample, simultaneously use is very convenient.

Description

Technical Field

[0001] This application relates to the field of materials testing technology, and in particular to a fully automatic cable internal shield resistivity testing system and testing method. Background Technology

[0002] High-voltage cables operate at very high voltages and have very strong electric fields. If the conductor has sharp points or protrusions, it will generate even more distorted field strength. Long-term distorted field strength will damage the insulation layer of the high-voltage cable, and in severe cases, it will break through the insulation layer, causing the cable to be scrapped.

[0003] The inner shielding layer of a high-voltage cable is made of a semi-conductive material, its function being to homogenize the electric field, making the electric field around the conductor uniform and thus extending the service life of the high-voltage cable. The resistivity of the inner shielding layer must be within a certain range; otherwise, it will not function effectively. Therefore, it is necessary to sample the high-voltage cable and test the resistivity of the inner shielding.

[0004] In existing testing equipment, for each cable sample to be tested, a person must manually reach into a 90-degree Celsius high-temperature chamber to replace it before the next sample can be tested. This makes it impossible to automatically test multiple samples, and it is also impossible to automatically record the test results. The results of each test must be recorded manually, which is extremely inconvenient. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a technology that can automatically test the internal shield resistivity of multiple cable samples and automatically record the test results.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A fully automatic cable internal shield resistivity testing system includes: a high-temperature test chamber, a resistivity meter, a camera, and a host computer; the high-temperature test chamber has a built-in testing mechanism, which includes a material changing mechanism and a pressing mechanism; the material changing mechanism includes a material changing platform; the material changing platform includes a test chamber and several test chambers, the test chambers are used to place material boxes, and the material boxes are used to place test samples; each test chamber is vertically arranged; the test chamber is connected to the test chamber at the bottom; the material changing mechanism is used to push the material boxes in the test chamber into the test chamber; the pressing mechanism includes several test electrodes; the test electrodes are set above the test chambers and connected to the resistivity meter for testing the test samples and displaying the measured resistance values; the host computer is connected to the camera, which acquires images of the resistance values ​​displayed by the resistivity meter and identifies the corresponding resistance values.

[0008] Specifically, the material changing mechanism also includes a material changing motor, a material changing screw, and a push plate; the first end of the material changing screw is connected to the shaft of the material changing motor, and the second end is fixedly connected to the push plate; the pressing mechanism also includes a pressing motor and a pressing screw; the first end of the pressing screw is connected to the shaft of the pressing motor, and the second end is fixedly connected to the test electrode; the high-temperature test chamber also includes a control module; the control module is connected separately to the material changing motor and the pressing motor, and is used to control the working status of the material changing motor and the pressing motor.

[0009] More specifically, the host computer includes a data acquisition module, a recognition module, an output module, and a storage module; these modules are connected sequentially. The data acquisition module is used to acquire image information captured by the camera. The recognition module pre-stores a convolutional visual recognition model, which is used to recognize the image information and identify the corresponding character data, where the character data corresponds to the measured resistance value. The output module pre-stores an output template, which is used to output the character data according to the output template, generate or update the corresponding output report, and store the output report in the storage module.

[0010] More specifically, the host computer also includes a setting module, which is connected to the output module, recognition module, acquisition module and control module respectively, and is used to set the corresponding working parameters of each module.

[0011] The material changing platform includes a first support platform and several fixed baffles; the first support platform includes a support base plate, and the fixed baffles are fixedly connected to the support base plate; the cavity between two adjacent fixed baffles forms a test chamber and a chamber to be tested; the material changing mechanism also includes a guide structure; the guide structure is set in the first support platform and is fixedly connected to the second end of the material changing screw.

[0012] Furthermore, the material changing mechanism also includes a first connecting seat and a first connecting rod; one end of the first connecting rod is connected to the shaft of the material changing motor, and the other end is connected to the first end shaft of the material changing lead screw; the first connecting seat is used to fix the position of the first connecting rod; the testing mechanism also includes a support seat; the pressing mechanism, the material changing platform, the first connecting seat and the support seat are respectively fixedly installed on the support seat.

[0013] The pressing mechanism includes a second support platform; the second support platform includes a support plate, a connecting plate, and several guide rods; one end of the guide rod is fixedly connected to the support plate; several guide shafts are provided on the connecting plate, and each guide shaft is movably connected to the corresponding guide rod; one end of the pressing screw is connected to the support plate, and the other end is fixedly connected to the connecting plate; the test electrode is set at the bottom of the connecting plate and fixedly connected to the connecting plate.

[0014] Furthermore, the support plate is also provided with a second connecting seat; the second connecting seat is used to fix the position of the first end of the second connecting rod and / or the pressure screw.

[0015] According to another aspect of the present invention, a test method is provided, applied to the above-described fully automatic cable internal shield resistivity test system, comprising the following steps:

[0016] S1: Heat and age the test sample in the high-temperature test chamber;

[0017] S2: Drive the material changing motor to push the material box corresponding to the push plate position in the test chamber into the test chamber;

[0018] S3: Drive the downward motor to bring the test electrode into contact with the test sample in the test chamber, and measure and display the corresponding resistance value through the resistivity meter;

[0019] S4: Capture the displayed resistance value using a camera and obtain the corresponding image information;

[0020] S5: Recognize image information and identify the corresponding character data through a pre-stored convolutional visual recognition model;

[0021] S6: Output character data according to the determined output template, generate or update the corresponding output report and store it;

[0022] S7: Determine whether the measurement of all test samples in the high-temperature test chamber has been completed; if not, repeat steps S2 to S6.

[0023] Specifically, before step S1, the following steps are also included:

[0024] S0: Initialization of the convolutional visual recognition model;

[0025] Step S0 further includes: generating a corresponding convolutional recognition classification based on the determined amount of character data.

[0026] The beneficial effects achieved by this invention are as follows: A fully automatic cable internal shield resistivity testing system includes: a high-temperature test chamber, a resistivity meter, a camera, and a host computer; the high-temperature test chamber has a built-in testing mechanism, which includes a material changing mechanism and a pressing mechanism; the material changing mechanism includes a material changing platform; the material changing platform includes a test chamber and several test chambers, the test chambers are used to place material boxes, and the material boxes are used to place test samples; each test chamber is arranged vertically; the test chamber is connected to the test chamber at the bottom; the material changing mechanism is used to push the material boxes in the test chamber into the test chamber; the pressing mechanism includes several test electrodes; the test electrodes are set above the test chamber and connected to the resistivity meter for testing the test samples and displaying the measured resistance value; the host computer is connected to the camera, which acquires the image of the resistance value displayed by the resistivity meter and identifies the corresponding resistance value; this application, through the material changing mechanism, can realize continuous testing of multiple test samples, eliminating the trouble of frequent manual replacement of test samples, and at the same time, the measurement result data can be obtained in real time through the camera, which is very convenient to use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic block diagram of a fully automatic cable internal shield resistivity testing system according to an embodiment of this application.

[0029] Figure 2 This is a three-dimensional structural schematic diagram of a fully automatic cable internal shield resistivity testing system according to an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the internal structure of a high-temperature test chamber of a fully automatic cable internal shield resistivity testing system according to an embodiment of this application.

[0031] Figure 4 This is a first three-dimensional structural schematic diagram of the testing mechanism of a fully automatic cable internal shield resistivity testing system according to an embodiment of this application;

[0032] Figure 5 This is a second three-dimensional structural schematic diagram of the testing mechanism of a fully automatic cable internal shield resistivity testing system according to an embodiment of this application;

[0033] Figure 6 This is a side view of the test mechanism of a fully automatic cable internal shield resistivity testing system according to an embodiment of this application.

[0034] Figure 7 This is a schematic diagram of the material box of a fully automatic cable internal shield resistivity testing system according to an embodiment of this application;

[0035] Figure 8 This is a cross-sectional structural diagram of the material box of a fully automatic cable internal shield resistivity testing system according to an embodiment of this application;

[0036] Figure 9 This is a schematic flowchart of a testing method according to an embodiment of this application;

[0037] Figure 10 This is an ID encoding representation of a testing method according to an embodiment of this application;

[0038] in, Figures 2 to 8 This includes:

[0039] 1. High-temperature test chamber; 11. Test chamber; 12. Chamber door; 13. Mounting bracket; 14. Recovery chamber; 15. Insulation board;

[0040] 16. Main control box;

[0041] 2. Testing mechanism; 21. Support base; 211. First connecting base; 212. Material changing motor; 213. Material changing screw;

[0042] 214. Push plate; 215. First motor mounting base; 216. First connecting rod;

[0043] 22. First support platform; 221. Support base plate; 222. Fixed baffle;

[0044] 23. Material box; 231. Support column; 232. Support rod; 233. Insulating bracket; 234. Material box bottom plate;

[0045] 24. Second support platform; 241. Support plate; 242. Guide rod; 243. Connecting plate; 244. Guide shaft;

[0046] 245. Test electrodes;

[0047] 25. Second motor mounting bracket; 251. Downward pressing motor; 252. Second connecting rod; 253. Second connecting bracket;

[0048] 26. Downward-pressing lead screw; 27. Guide structure; 3. Test sample. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] Example 1

[0051] One implementation method of the fully automatic cable internal shield resistivity testing system of this application, such as Figures 1 to 8 As shown, it includes: a high-temperature test chamber 1, a resistivity tester, a camera, and a host computer; the high-temperature test chamber 1 has a built-in testing mechanism 2.

[0052] The high-temperature test chamber 1 includes a test chamber 11, a recovery chamber 14, a main control box 16, a door 12, and a mounting frame 13. The mounting frame 13 is positioned between the test chamber 11 and the recovery chamber 14. The testing mechanism 2 is located inside the test chamber 11 and is fixedly mounted on the mounting frame 13. A heat insulation plate 15 is provided between the main control box 16 and the test chamber 11 and the recovery chamber 14. The test chamber 11 is also equipped with a heater for heating the interior of the test chamber 11.

[0053] Specifically, the testing mechanism 2 includes a material changing mechanism, a pressing mechanism, and a support base 21; the material changing mechanism and the pressing mechanism are fixed on the support base 21, and the support base 21 is mounted on the mounting frame 13.

[0054] The material changing mechanism includes a material changing motor 212, a material changing screw 213, a push plate 214, and a material changing platform. The material changing platform includes a test chamber and several test chambers. The test chambers are used to place material boxes 23, and the material boxes 23 are used to place test samples 3. Each test chamber is arranged vertically. The test chamber is connected to the test chambers at the bottom. The first end of the material changing screw 213 is connected to the shaft of the material changing motor 212, and the second end is fixedly connected to the push plate 214.

[0055] Specifically, the material changing platform includes a first support platform 22 and several fixed baffles 222; the first support platform 22 includes a support base plate 221, and the fixed baffles 222 are fixedly connected to the support base plate 221. The cavity between two adjacent fixed baffles 222 forms a test chamber and a test chamber. In this embodiment, there are two fixed baffles 222, forming one test chamber and several test chambers; in some embodiments, multiple fixed baffles 222 can also be set, for example, when three fixed baffles 222 are set, two test chambers can be formed, and the test samples in the two test chambers can be tested simultaneously.

[0056] The pressing mechanism includes a pressing motor 251, a pressing lead screw 26, and several test electrodes 245; the first end of the pressing lead screw 26 is connected to the shaft of the pressing motor 251, and the second end is fixedly connected to the test electrodes 245; wherein, the test electrodes 245 are arranged above the test chamber.

[0057] The high-temperature test chamber 1 also includes a control module and a power supply module, both of which are located in the main control box 16. The power supply module is connected to the control module to supply power to the control module. The control module is connected separately to the material changing motor 212 and the pressure motor 251 to control the working status of the material changing motor 212 and the pressure motor 251. It is also connected to the heater to control the heating temperature in the test chamber 11.

[0058] When the material changing motor 212 rotates forward, the material changing screw 213 extends, and the push plate 214 moves towards the test chamber, simultaneously pushing the bottom material box 23 in the test chamber into the test chamber. Then, the material changing motor 212 rotates in reverse, the material changing screw 213 shortens, and the push plate 214 moves backward to reset. Similarly, after the test sample 3 in the test chamber is tested, the material changing motor 212 rotates forward, pushing the next material box 23 from the test chamber to the test chamber. The material box 23 originally in the test chamber is pushed open and falls into the recovery chamber 14, thus realizing automatic material changing.

[0059] When the test box 23 is moved to the test chamber, the pressure motor 251 rotates forward, the pressure screw 26 extends, and at the same time, it drives the test electrode 245 to move downward and come into contact with the test sample 3. After the test is completed, the pressure motor 251 rotates in reverse, the pressure screw 26 shortens, and at the same time, it drives the test electrode 245 to move upward to reset.

[0060] The host computer connects to the camera, which captures images of the resistance values ​​displayed on the resistivity meter and identifies the corresponding resistance values. This method of capturing and identifying images via a camera directly avoids incompatibility issues between different models of resistivity meters and the host computer, and eliminates the hassle of repeatedly defining different connection ports when replacing different models of resistivity meters.

[0061] Meanwhile, in this embodiment, the resistivity tester is an old device that does not have a signal output function. Therefore, the data displayed by the device can only be read into the computer using a vision system. Its advantage is that it can automate the shielded resistivity test at low cost by modifying existing equipment.

[0062] Specifically, the host computer includes a data acquisition module, an identification module, an output module, and a storage module; the data acquisition module, identification module, output module, and storage module are connected in sequence.

[0063] The acquisition module is used to acquire image information captured by the camera.

[0064] The recognition module pre-stores a convolutional visual recognition model, which is used to recognize image information and identify the corresponding character data, where the character data corresponds to the measured resistance value.

[0065] The output module has pre-stored output templates, which are used to output character data according to the output templates, generate or update the corresponding output reports, and store the output reports in the storage module.

[0066] More specifically, the host computer also includes a setting module, which is connected to the output module, recognition module, acquisition module, and control module respectively. This setting module is used to set the operating parameters for each module, including:

[0067] 1) Product model and corresponding test parameters for each product model, including heating temperature, heating time, measurement height (used to determine the pressing distance of the pressing screw 26), and the number of measurements for each test sample;

[0068] 2) The frequency of testing and the frequency of data acquisition by the acquisition module;

[0069] 3) Output the specific format of the template.

[0070] Furthermore, the testing mechanism 2 also includes a first motor mounting base 215 and a second motor mounting base 25; the first motor mounting base 215 is fixedly installed on the side of the high temperature test chamber 1 for mounting the material changing motor 212; the second motor mounting base 25 is fixedly installed on the top surface of the high temperature test chamber 1 for mounting the pressure motor 251.

[0071] More specifically, the material changing mechanism also includes a guide structure 27, a first connecting seat 211, and a first connecting rod 216. The guide structure 27 is disposed within the first support platform 22 and is fixedly connected to the second end of the material changing screw 213. One end of the first connecting rod 216 is connected to the shaft of the material changing motor 212, and the other end is connected to the first end shaft of the material changing screw 213; the first connecting seat 211 is fixed on the support base 21 and is used to fix the position of the first connecting rod 216.

[0072] More specifically, the pressing mechanism also includes a second support platform 24; the second support platform 24 includes a support plate 241, a connecting plate 243, and several guide rods 242; one end of each guide rod 242 is fixedly connected to the support plate 241, and the other end is fixedly connected to the support base 21. The connecting plate 243 is provided with several guide shafts 244, each guide shaft 244 being movably connected to a corresponding guide rod 242, allowing the connecting plate 243 to move back and forth along the axis of the guide rod 242. One end (i.e., the movable end) of the pressing screw 26 is fixedly connected to the support plate 241, and the other end is fixedly connected to the connecting plate 243. The test electrode 245 is located at the bottom of the connecting plate 243 and is fixedly connected to the connecting plate 243.

[0073] More specifically, the support plate 241 is also provided with a second connecting seat 253; the second connecting seat 253 is used to fix the position of the second connecting rod 252 and / or the first end of the pressing screw 26.

[0074] More specifically, the material box 23 includes a material box base plate 234, an insulating bracket 233, a number of support columns 231, and a number of support connecting rods 232; the insulating bracket 233 and the support columns 231 are respectively fixedly mounted on the material box base plate 234; the two ends of the support connecting rods 232 are respectively fixedly connected to the corresponding support columns 231.

[0075] More specifically, the insulating bracket 233 is provided with an arc-shaped groove for placing the test sample 3, which matches the outer contour of the test sample 3. At the same time, the test electrode 245 is fan-shaped, which matches the shape of the test sample 3, and can press the test sample 3 tightly when pressed down.

[0076] According to another aspect of the invention, such as Figure 9 As shown, a test method is provided, applied to the aforementioned fully automatic cable internal shield resistivity test system, comprising the following steps S1 to S7:

[0077] S0: Initialization of the convolutional visual recognition model;

[0078] Step S0 further includes: generating a corresponding convolutional recognition classification based on the determined amount of character data; that is, determining the character to be detected and its corresponding ID.

[0079] In this embodiment, the resistivity meter uses a digital tube to display the corresponding resistance value. Therefore, the 25 characters appearing on the digital tube are trained into convolutional recognition and classification into 25 targets, specifically as follows: Figure 10 As shown.

[0080] S1: Heat and age the test sample in the high-temperature test chamber;

[0081] S2: Drive the material changing motor to push the material box corresponding to the push plate position in the test chamber into the test chamber;

[0082] S3: Drive the downward motor to bring the test electrode into contact with the test sample in the test chamber, and measure and display the corresponding resistance value through the resistivity meter;

[0083] S4: Capture the displayed resistance value using a camera and obtain the corresponding image information;

[0084] S5: Recognize image information and identify the corresponding character data through a pre-stored convolutional visual recognition model;

[0085] When actually testing image information, the characters appearing on the digital tube of the resistivity tester can be identified by recognizing the corresponding content and position through the above 25 characters. The above characters can be recognized instantly from any angle and position, which is very efficient and has a good recognition effect.

[0086] S6: Output character data according to the determined output template, generate or update the corresponding output report and store it;

[0087] S7: Determine whether the measurement of all test samples in the high-temperature test chamber has been completed; if not, repeat steps S2 to S6.

[0088] In summary, the fully automatic cable internal shield resistivity testing system and method of this application can realize continuous automatic sample changing and testing, and automatically store, calculate and print the test results data; it can effectively free up manpower, improve the working environment of testing personnel, and effectively improve the work efficiency of testing personnel.

[0089] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the appended claims.

Claims

1. A fully automatic cable internal shield resistivity testing system, characterized in that, include: High-temperature test chamber, resistivity meter, camera, and host computer; The high-temperature test chamber has a built-in testing mechanism, which includes a material changing mechanism and a pressing mechanism. The material changing mechanism includes a material changing platform; the material changing platform includes a test chamber and several test chambers, the test chambers are used to place material boxes, and the material boxes are used to place test samples; each test chamber is arranged vertically; the test chamber is connected to the test chamber at the bottom; the material changing mechanism also includes a material changing motor, a material changing screw, and a push plate. When the material changing motor rotates forward, the material changing screw extends, the push plate moves towards the test chamber, and at the same time pushes the bottom material box in the test chamber into the test chamber; then the material changing motor rotates in reverse, the material changing screw shortens, and the push plate moves backward to reset. After the test sample in the test chamber is tested, the material changing motor rotates forward, pushing the next material box from the test chamber to the test chamber, and the material box in the original test chamber is pushed away, realizing automatic material changing; The pressing mechanism includes several test electrodes; the test electrodes are disposed above the test chamber and connected to the resistivity tester for testing the test sample and displaying the measured resistance value; The host computer is connected to the camera, and the camera captures images of the resistance values ​​displayed by the resistivity tester and identifies the corresponding resistance values.

2. The fully automatic cable internal shield resistivity testing system according to claim 1, characterized in that: The first end of the material changing screw is connected to the shaft of the material changing motor, and the second end is fixedly connected to the push plate. The pressing mechanism also includes a pressing motor and a pressing lead screw; the first end of the pressing lead screw is connected to the shaft of the pressing motor, and the second end is fixedly connected to the test electrode. The high-temperature test chamber also includes a control module; the control module is connected separately to the material changing motor and the pressure motor, and is used to control the working status of the material changing motor and the pressure motor.

3. The fully automatic cable internal shield resistivity testing system according to claim 2, characterized in that: The host computer includes a data acquisition module, an identification module, an output module, and a storage module; the data acquisition module, the identification module, the output module, and the storage module are connected in sequence. The acquisition module is used to acquire image information captured by the camera; The recognition module pre-stores a convolutional visual recognition model, which is used to recognize the image information and identify the corresponding character data, wherein the character data corresponds to the measured resistance value; The output module pre-stores an output template, which is used to output the character data according to the output template, generate or update the corresponding output report, and store the output report in the storage module.

4. The fully automatic cable internal shield resistivity testing system according to claim 3, characterized in that: The host computer also includes a setting module, which is connected to the output module, the identification module, the acquisition module and the control module respectively, and is used to set the working parameters of each module.

5. A fully automatic cable internal shield resistivity testing system according to any one of claims 2 to 4, characterized in that: The material changing platform includes a first support platform and several fixed baffles; The first support platform includes a support base plate, and the fixed baffle is fixedly connected to the support base plate; the cavity between two adjacent fixed baffles forms the test chamber and the chamber to be tested; The material changing mechanism also includes a guiding structure; The guide structure is disposed within the first support platform and is fixedly connected to the second end of the material changing screw.

6. The fully automatic cable internal shield resistivity testing system according to claim 5, characterized in that: The material changing mechanism further includes a first connecting seat and a first connecting rod; one end of the first connecting rod is connected to the shaft of the material changing motor, and the other end is connected to the first end shaft of the material changing lead screw; the first connecting seat is used to fix the position of the first connecting rod; The testing mechanism also includes a support base; the pressing mechanism, the material changing platform, the first connecting seat, and the support base are respectively fixedly installed on the support base.

7. A fully automatic cable internal shield resistivity testing system according to any one of claims 2 to 4, characterized in that: The pressing mechanism includes a second support platform; The second support platform includes a support plate, a connecting plate, and several guide rods; One end of the guide rod is fixedly connected to the support plate; The connecting plate is provided with a plurality of guide shafts, and each guide shaft is movably connected to a corresponding guide rod. One end of the downward pressing screw is connected to the support plate, and the other end is fixedly connected to the connecting plate; The test electrode is located at the bottom of the connecting plate and is fixedly connected to the connecting plate.

8. The fully automatic cable internal shield resistivity testing system according to claim 7, characterized in that: The support plate is also provided with a second connecting seat and a second connecting rod; The second connecting seat is used to fix the position of the second connecting rod and / or the first end of the pressing screw, and the first end of the pressing screw is connected to the pressing motor through the second connecting rod.

9. A testing method, applied in the fully automatic cable internal shield resistivity testing system according to any one of claims 3 to 8, characterized in that, Includes the following steps: S1: Heat and age the test sample in the high-temperature test chamber; S2: Drive the material changing motor to push the material box corresponding to the push plate position in the test compartment into the test compartment; S3: Drive the downward motor to make the test electrode contact the test sample in the material box in the test chamber, and measure and display the corresponding resistance value through the resistivity tester; S4: Capture the displayed resistance value using a camera and obtain the corresponding image information; S5: The image information is identified using a pre-stored convolutional visual recognition model to identify the corresponding character data; S6: Output the character data according to the determined output template, generate or update the corresponding output report and store it; S7: Determine whether the measurement of all test samples in the high-temperature test chamber has been completed; if not, repeat steps S2 to S6.

10. A test method according to claim 9, characterized in that, Before step S1, the method further includes: S0: Initialization of the convolutional visual recognition model; Step S0 further includes: generating a corresponding convolutional recognition classification based on the determined amount of character data.

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