Movable equipment defect infrared nondestructive testing device based on multi-pole electric pulse thermal excitation

By combining multipole electrical pulse thermal excitation technology with infrared thermal imaging technology, the deficiency in detection accuracy and efficiency of infrared thermal imaging technology is solved, and efficient and convenient equipment defect detection is achieved, which is suitable for the automated detection of new energy storage and transportation and chemical equipment.

CN120507355APending Publication Date: 2025-08-19FUZHOU UNIV
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Patent Information

Application Number
CN202510656306.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-21
Publication Date
2025-08-19

AI Technical Summary

Technical Problem

The existing infrared thermal imaging technology has shortcomings in detection accuracy and efficiency, especially in the detection of complex structures and micro defects. The traditional devices are huge and bulky and have operational hazards, and conventional detection methods increase operation and maintenance costs and safety risks.

Method used

The multi-pole electrical pulse thermal excitation technology is combined with infrared thermal imaging technology, and the equipment is accurately thermally excited through a six-axis robotic arm and a multi-pole pulse current thermal excitation system. It is equipped with a movable detection box and a defect image processing and recognition system to achieve automated detection.

Benefits of technology

It improves the accuracy and efficiency of infrared non-destructive testing of equipment defects, meets the testing needs of different shapes, sizes and structures, and realizes convenience and high precision of testing.

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Abstract

The invention relates to a movable equipment defect infrared nondestructive detection device based on multipolar electric pulse thermal excitation. The movable equipment defect infrared nondestructive detection device comprises a movable detection box, a detection clamp, a multipolar pulse current thermal excitation system and a defect detection and image processing identification system, a six-axis mechanical arm and a cable bundle are arranged in the movable detection box, and the six-axis mechanical arm can be lifted up and down; the multi-pole pulse current thermal excitation system comprises a pulse current instrument array, a circulating cooling device and a pulse current control module, the pulse current instrument array is composed of a plurality of pulse current instrument arrays, and the cable bundle is connected with the pulse current instrument array and the detection clamp; the defect detection and image processing recognition system comprises an infrared thermal imager, a controller and a computing center, the infrared thermal imager is fixedly installed at the tail end of the six-axis mechanical arm and used for shooting infrared thermal imaging images, and the computing center is used for recognizing equipment defects from the shot images. The device can improve the precision, efficiency and convenience of infrared nondestructive detection of equipment defects.
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Description

Technical Field

[0001] The present invention relates to the technical field of nondestructive testing, and in particular to a movable infrared nondestructive testing device for equipment defects based on multi-pole electric pulse thermal excitation. Background Art

[0002] Process industry equipment plays a vital role in national economic and social development. As the global energy structure transitions to a green and low-carbon one, ammonia hydrogen, as an efficient and clean energy carrier, is increasingly being used in its storage and transportation equipment. However, equipment and pipelines in new energy storage and transportation environments have long faced failure problems due to defects such as hydrogen embrittlement, stress corrosion cracking, and hydrogen-induced cracking. In particular, in liquid ammonia storage tanks, hydrogen pipelines, and ammonia decomposition reactors, hydrogen atoms penetrate into the metal lattice under high pressure or corrosive conditions, causing permanent damage to the material, a decrease in plasticity and strength, and even sudden failure, seriously threatening the safe operation of the equipment. In addition to new energy storage and transportation equipment, chemical equipment also faces defects and failures arising from long-term service. Conventional detection methods may increase operation and maintenance costs and safety risks due to equipment downtime and disassembly. Therefore, the development of a fast, non-contact, and efficient non-destructive testing technology is crucial to ensuring the safety and reliability of new energy storage and transportation and chemical equipment.

[0003] Infrared thermal imaging nondestructive testing technology is an emerging nondestructive testing technology that has emerged with the development of infrared thermal imaging technology. It identifies internal defects by capturing the temperature signal differences on the surface of an object. As a new type of digital nondestructive testing technology, it has the characteristics of non-contact, fast measurement speed, wide range, intuitive results, real-time monitoring, and easy automation.

[0004] However, traditional infrared thermal imaging technology is significantly affected by the environment and still has shortcomings in detection accuracy and defect recognition capabilities, especially when it comes to inspecting complex structures and detecting tiny defects. For example, using traditional laser point thermal imaging excitation methods has low detection efficiency and requires high detection conditions, increasing system complexity and cost even after optimization. Using strong pulse discharge devices offers good detection results, but the devices are bulky and heavy, and pose a high risk of operation. Summary of the Invention

[0005] The purpose of the present invention is to provide a movable infrared non-destructive detection device for equipment defects based on multi-pole electric pulse thermal excitation, which can improve the accuracy, efficiency and convenience of infrared non-destructive detection of equipment defects.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a movable equipment defect infrared non-destructive detection device based on multi-pole electric pulse thermal excitation, including a movable detection box, a detection fixture, a multi-pole pulse current thermal excitation system and a defect detection and image processing and recognition system; a six-axis robotic arm and a cable bundle are arranged in the movable detection box, and the six-axis robotic arm can be raised and lowered so as to rise to the upper side of the movable detection box when working and be stored in the movable detection box when not working, and the current output end of the cable bundle is connected to the detection fixture; the detection fixture is used to clamp the object to be inspected; the multi-pole pulse current thermal excitation system includes a pulse current meter array, a circulating cooling device and a pulse current control module, and the pulse current meter array It is composed of an array of multiple pulse current meters, which are respectively connected to a pulse current control module. The pulse current meter array is connected to the current input end of the cable bundle. The circulating cooling device cools the pulse current meter array in the multi-pole pulse current thermal excitation system. The defect detection and image processing and identification system includes an infrared thermal imager, a controller and a computing center. The infrared thermal imager is fixedly installed at the end of the six-axis robotic arm and is driven by the controller to achieve all-round detection of the inspected object. The infrared thermal imager is used to capture infrared thermal imaging images of the inspected object subjected to pulse current thermal excitation. The computing center is used to analyze and process the infrared thermal imaging images captured by the infrared thermal imager to identify defects in the inspected object.

[0007] Furthermore, the movable detection box includes a movable detection box shell, a lifting platform mechanism, a six-axis robotic arm, a cable bundle, a cable winch and a universal shock-absorbing spring wheel; the lifting platform mechanism is arranged in the movable detection box shell, and the six-axis robotic arm is fixedly installed above the lifting platform mechanism so as to be lifted and lowered under its drive, and a robotic arm lifting outlet is correspondingly opened on the upper side wall of the movable detection box shell; the cable bundle is wound on the cable winch, and its current input end and current output end can be pulled outward and pass through the movable detection box shell respectively, and then electrically connected to the pulse ammeter array and the detection fixture; the universal shock-absorbing spring wheel is installed at the bottom of the movable detection box shell to meet the mobility requirements of different detection scenarios.

[0008] Furthermore, the equipment defect infrared non-destructive testing device is equipped with a series of testing fixtures, and the current output end of the cable bundle can be replaced and connected to different testing fixtures to be applied to the testing of equipment with different structures, shapes and sizes.

[0009] Furthermore, the series of detection fixtures include C-type fixtures, tiger clamp fixtures and optical fiber fixtures.

[0010] Furthermore, each pulse current meter is provided with a pulse current stepless adjustment knob and a pulse current status display screen.

[0011] Furthermore, the pulse current control module is electrically connected to each pulse current meter through a data line to control the pulse current excitation mode, thereby matching the infrared thermal imager to complete pulse current thermal excitation infrared non-destructive testing of different schemes.

[0012] Furthermore, the circulating cooling device includes an integrated box, a coolant storage tank and a centrifugal pump. The pulse current meter array is built into the integrated box, and multiple coolant pipelines are arranged in the integrated box. The coolant pipelines pass through the integrated box and are connected to the coolant storage tank and the centrifugal pump to form a circulating cooling loop. The centrifugal pump pumps the coolant in the coolant storage tank into the coolant pipeline.

[0013] Furthermore, the computing center includes a storage system, a network transmission system and a server. The infrared thermal imager is connected to the storage system to store the captured images on the storage system. The storage system is connected to the server through the network transmission system to transmit the stored images to the server for processing. Defect image enhancement and recognition software is installed on the server to perform image analysis and defect recognition.

[0014] Compared with the existing technology, the present invention has the following beneficial effects: In order to overcome the shortcomings of the existing technology, improve the accuracy and efficiency of infrared non-destructive testing of equipment defects, and realize the automation of the detection process, the present invention proposes a movable infrared non-destructive testing device for equipment defects based on multi-pole electric pulse thermal excitation. The device innovatively adopts multi-pole electric pulse thermal excitation technology and infrared thermal imaging technology. By precisely controlling the pulse current meter array for thermal excitation, a fixture that applies pulse current is designed for the common structures of new energy storage and transportation and chemical equipment, and the accuracy of the thermal wave signal of the detection part is enhanced in a targeted manner, thereby improving the detection accuracy of infrared thermal imaging. At the same time, the device is equipped with a movable detection box and a defect image processing and recognition system, which realizes the convenience of the detection process and the high accuracy of the detection results, and can meet the detection needs of equipment of different shapes, sizes, angles and structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the device structure of an embodiment of the present invention.

[0016] Figure 2 2 is a schematic structural diagram of a movable detection box in an embodiment of the present invention.

[0017] Figure 3 Schematic diagram of the structure of the six-axis robotic arm in an embodiment of the present invention.

[0018] Figure 4 It is a structural schematic diagram of a series of detection fixtures in an embodiment of the present invention.

[0019] Figure 5It is a structural schematic diagram of a circulating cooling device in an embodiment of the present invention.

[0020] Figure 6 This is a flowchart of an implementation method of an equipment defect recognition method based on infrared thermal imaging in an embodiment of the present invention.

[0021] In the figure: 1-controller; 2-six-axis robotic arm; 3-infrared thermal imager; 4-pulse galvanometer array; 5-pulse galvanometer current output port; 6-pulse current stepless adjustment knob; 7-pulse current status display screen; 8-pulse current control module; 9-server; 10-network transmission system; 11-storage system; 12-series detection fixtures; 13-universal shock-absorbing spring wheel; 14-movable detection box; 15-C-type fixture; 16-plate specimen; 17-tiger clamp; 18-tubular specimen; 19-optical fiber fixture; 20-bracket; 21-wrist motor; 22-waist motor; 23-base; 24-movable detection box shell; 25-robotic arm lifting outlet; 26-lifting platform mechanism; 27-cable winch; 28-coolant pipeline; 29-coolant outlet; 30-coolant storage tank; 31-centrifugal pump; 32-coolant inlet. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] like Figure 1As shown, this embodiment provides a movable equipment defect infrared non-destructive detection device based on multi-pole electric pulse thermal excitation, including a movable detection box 14, a detection fixture 12, a multi-pole pulse current thermal excitation system and a defect detection and image processing and recognition system; a six-axis robot arm 2 and a cable bundle are provided in the movable detection box 14, and the six-axis robot arm 2 can be raised and lowered so as to rise to the upper side of the movable detection box 14 when working and be stored in the movable detection box 14 when not working, and the current output end of the cable bundle is connected to the detection fixture 12; the detection fixture 12 is used to clamp the object to be inspected; the multi-pole pulse current thermal excitation system includes a pulse current meter array 4, a circulating cooling device and a pulse current control module 8, and the pulse current meter array 4 is composed of The system is composed of an array of multiple pulse current meters, each of which is connected to a pulse current control module 8. The pulse current meter array 4 is connected to the current input end of the cable bundle. The circulating cooling device cools the pulse current meter array 4 in the multi-pole pulse current thermal excitation system. The defect detection and image processing and identification system includes an infrared thermal imager 3, a controller 1 and a computing center. The infrared thermal imager 3 is fixedly installed at the end of the six-axis robotic arm 2 and is driven by the controller 1 to achieve all-round detection of the inspected object. The infrared thermal imager 3 is used to capture infrared thermal imaging images of the inspected object subjected to pulse current thermal excitation. The computing center is used to analyze and process the infrared thermal imaging images captured by the infrared thermal imager 3 to identify defects in the inspected object.

[0026] like Figure 2 As shown, the movable detection box 14 includes a movable detection box housing 24, a lifting platform mechanism 26, a six-axis robot arm 2, a cable bundle, a cable winch 27, and a universal shock-absorbing spring wheel 13. The lifting platform mechanism 26 is arranged in the movable detection box housing 24, and the six-axis robot arm 2 is fixedly installed above the lifting platform mechanism 26 so as to be raised and lowered under its drive. A robot arm lifting outlet 25 is correspondingly opened on the upper side wall of the movable detection box housing 24. The cable bundle is wound on the cable winch 27, and its current input and current output ends can be pulled out and passed through the movable detection box housing 24 respectively, and then electrically connected to the pulse current meter array 4 and the detection fixture 12. The universal shock-absorbing spring wheel 13 is installed at the bottom of the movable detection box housing 24 to meet the mobility requirements of different detection scenarios.

[0027] The structure of the six-axis robot arm 2 is as follows Figure 3As shown. The six-axis robotic arm 2 is fixed to a lifting platform mechanism 26 in a movable inspection box integrated box via a fixed base 23. Controlled by a controller 1, the lifting platform mechanism 26 is raised to a fixed height during operation. The waist motor 22 of the robotic arm is directly connected to the fixed base 23, and the wrist motor 21 is directly connected to the infrared thermal imager 3. Controlled by the controller 1, it moves to the inspection location. The coordinated movement of the six-axis robotic arm enables the infrared thermal imager to move freely within space. The coordinated movement of the six-axis robotic arm is well known in the art, and the specific movement is not protected by this invention.

[0028] like Figure 4 As shown, the infrared nondestructive testing device for equipment defects is equipped with a series of testing fixtures 12. The current output end of the cable bundle can be connected to different testing fixtures to facilitate testing of equipment of different structures, shapes, and sizes. The series of testing fixtures 12 includes a C-type clamp 15, a tiger clamp 17, and a fiber optic clamp 19.

[0029] Each pulse current meter is equipped with a pulse current stepless adjustment knob 6 and a pulse current status display screen 7. The pulse current control module 8 is electrically connected to each pulse current meter via a data line to control the pulse current excitation mode, thereby matching the infrared thermal imager to complete pulse current thermal excitation infrared non-destructive testing of different schemes.

[0030] like Figure 5 As shown, the circulating cooling device includes an integrated box, a coolant storage tank 30, and a centrifugal pump 31. The pulse galvanometer array 4 is built into the integrated box, and multiple coolant pipelines 28 are arranged in the integrated box. The coolant pipelines are arranged on both sides of the pulse galvanometers to cool them. The coolant pipelines 28 pass through the integrated box and connect to the coolant storage tank 30 and centrifugal pump 31 to form a circulating cooling loop. The centrifugal pump 31 pumps the coolant in the coolant storage tank 30 into the coolant pipelines 28, achieving rapid cooling of the pulse galvanometer array.

[0031] The computing center includes a storage system 11, a network transmission system 10 and a server 9. The infrared thermal imager 3 is connected to the storage system 11 to store the captured images on the storage system 11. The storage system 11 is connected to the server 9 through the network transmission system 10 to transmit the stored images to the server 9 for processing. The server 9 is installed with defect image enhancement recognition software for image analysis and defect recognition.

[0032] During operation, the infrared thermal imager, test fixtures, cables, etc. are moved to the vicinity of the equipment to be tested via the movable test box 14 to prepare for the initial non-destructive testing. The six-axis robotic arm 2 of the movable test box controls the infrared thermal imager 3 to the required inspection location of the equipment to be tested, and clamps the series of test fixtures 12 to the inspection location. The series of test fixtures 12 are set on one side of the movable test box 14. A suitable test fixture is selected and fixedly connected to the pulse current meter array 4 through the cable bundle in the movable test box. The pulse current from the pulse current meter array 4 is received and applied to the inspection location to achieve active thermal excitation. The infrared thermal imager captures the inspection location, completing the infrared non-destructive testing of equipment defects. The series of test fixtures 12 are fixedly connected to the test fixtures 12 via bolts or pins, making disassembly and assembly simple and convenient.

[0033] The pulse current meter array 4 is connected to the series of detection fixtures 12 through a cable bundle, and a pulse current thermal excitation is performed on the inspection site through a predetermined circuit; the series of detection fixtures 12 selects a suitable detection fixture and clamping method according to the specific structure and working conditions of the inspection site, such as a C-type fixture 15 that is applicable to a plate sample 16, a tiger clamp fixture 17 that is applicable to a tubular sample 18, and an optical fiber fixture 19 that is applicable to a complex structure such as a support structure 21, and a pulse current is applied for a time of 0 to 1s and a current of 0 to 2000A through a pulse current stepless adjustment knob 6, and a pulse current status display screen 7 It can display the real-time situation of the pulse current applied by each pulse current meter in the array; the infrared thermal imager 3 is connected to the robotic arm through the infrared thermal imager fixed interface; the front of the infrared thermal imager 3 is provided with a focusing ring and a zoom lens. Based on the image recognition system, the zoom lens can lock the test piece and change the focus to capture the clearest image. At the same time, the appropriate temperature sensing range can be selected according to the specific situation of the inspection site and the working conditions of the pulse current meter array 4. Based on the multi-pole electric pulse thermal excitation in the subsequent experimental process, the zoom lens can recapture the defects of the test piece and refocus, and feed back the clear defect image to the defect image processing and recognition system.

[0034] The infrared thermal imager 3 is connected to the server 9 of the terminal computing center through a cable bundle in a movable detection box, and sends the collected data image back to the processing and recognition system; the defect image enhancement and recognition software can perform image preprocessing, image feature extraction and defect enhancement processing on the image obtained after multi-polar electric pulse thermal excitation.

[0035] The server 9 of the terminal computing center connects the data output port of the movable detection box with the data input port of the terminal computing center, and transmits the data detected by the infrared thermal imager 3 to the storage system 11 through the network transmission system 10. The obtained data is further uploaded to the server 9 of the terminal computing center according to the detection requirements, and is processed by the defect image enhancement recognition software to obtain the detection results.

[0036] This embodiment also provides a method for infrared nondestructive detection of device defects based on multi-pole electric pulse thermal excitation, comprising the following steps: Step 1: Move the movable inspection box so that the movable inspection platform is near the equipment to be inspected, and adjust the six-axis robotic arm so that the infrared thermal imager is facing the required inspection position of the equipment to be inspected.

[0037] Step 2: Select a suitable test fixture and pulse current application method based on the specific structure and working conditions of the test area of the equipment to be tested. Connect it to the cable harness in the movable test box and then fix the test fixture to the test area, ensuring a stable connection and easy assembly and disassembly. Step 3: Adjust the pulse current meter array according to the actual detection situation, apply pulse current to the inspection site to achieve active thermal excitation, and monitor the pulse current applied by each pulse current meter in real time through the pulse current status display; Step 4: According to the specific conditions of the inspection area and the working conditions of the pulse current meter array, the infrared thermal imager selects the appropriate temperature sensing range and focal length to perform infrared thermal imaging non-destructive testing; Step 5: The collected data image is sent to the terminal computing center through the infrared thermal imager, and the defect image enhancement recognition software is used to pre-process, extract features and enhance defects on the image to obtain the detection results.

[0038] Figure 6 This is a flow chart of the device defect recognition method based on infrared thermal imaging in this embodiment. Figure 6 As shown, the implementation process of this method is as follows: 1) The pulse current from the pulse galvanometer array is applied to the inspection site. The current density at the crack increases regularly under the action of the pulse current, generating high temperatures through the Joule heating effect. Different excitation methods cause the temperature at the defect to be higher than that of the surrounding intact area, releasing infrared radiation.

[0039] 2) The infrared thermal imager uses a highly sensitive infrared detector to receive and convert the infrared radiation emitted by the inspection site into an electrical signal, obtain the surface temperature distribution data of the inspection site, and generate raw infrared data.

[0040] 3) After the infrared thermal imager collects data images and sends them back to the computing center, they enter the preprocessing unit: a convolutional neural network is used for denoising to improve image recognition accuracy; image cropping focuses on the main part to reduce the calculation area; and image subtraction is used to enhance contrast and highlight defect information.

[0041] 4) After preprocessing, the image is converted into a single-channel grayscale image through the radiation temperature-grayscale value conversion model, and grayscale processing is performed to reduce the data dimension and retain the original temperature distribution information.

[0042] 5) The pre-processed and grayscale-processed defect feature image set is input into a preset hybrid algorithm model that combines deep learning with a thermodynamic model to perform cross-modal data fusion. Based on the improved U-Net structure, spatial features such as the shape, size, and location of the defect area are extracted. The regression model predicts parameters such as damage degree and depth. The data is then compared with historical defect detection data for correlation analysis.

[0043] 6) Obtain the detection results of equipment defects.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A portable infrared nondestructive testing device for equipment defects based on multi-pole electric pulse thermal excitation, characterized in that: It includes a movable detection box, a detection fixture, a multi-pole pulse current thermal excitation system and a defect detection and image processing and recognition system; a six-axis robotic arm and a cable bundle are provided in the movable detection box, the six-axis robotic arm can be raised and lowered so as to be raised to the upper side of the movable detection box when working and stored in the movable detection box when not working, the current output end of the cable bundle is connected to the detection fixture; the detection fixture is used to clamp the object to be inspected; the multi-pole pulse current thermal excitation system includes a pulse current meter array, a circulating cooling device and a pulse current control module, the pulse current meter array is composed of a plurality of pulse current meter arrays, the plurality of pulse current meters are respectively connected to the pulse current control module, the pulse current meter array is connected to the current input end of the cable bundle, and the circulating cooling device cools the pulse current meter array in the multi-pole pulse current thermal excitation system; The defect detection and image processing and identification system includes an infrared thermal imager, a controller and a computing center. The infrared thermal imager is fixedly installed at the end of the six-axis robotic arm and is driven by the controller to achieve all-round detection of the inspected object. The infrared thermal imager is used to capture infrared thermal imaging images of the inspected object subjected to pulsed current thermal excitation. The computing center is used to analyze and process the infrared thermal imaging images captured by the infrared thermal imager to identify defects in the inspected object.

2. The portable infrared nondestructive testing device for equipment defects based on multi-pole electric pulse thermal excitation according to claim 1 is characterized in that: The movable detection box includes a movable detection box housing, a lifting platform mechanism, a six-axis robotic arm, a cable bundle, a cable winch, and a universal shock-absorbing spring wheel; the lifting platform mechanism is disposed within the movable detection box housing, and the six-axis robotic arm is fixedly mounted above the lifting platform mechanism so as to be raised and lowered under the drive of the lifting platform mechanism. A corresponding robotic arm lifting outlet is provided on the upper side wall of the movable detection box housing; The cable bundle is wound on a cable winch, and its current input end and current output end can be pulled out and passed through the movable detection box shell, and then electrically connected to the pulse current meter array and the detection fixture; The universal shock-absorbing spring wheel is installed at the bottom of the movable detection box shell to meet the mobility requirements of different detection scenarios.

3. The portable infrared nondestructive testing device for equipment defects based on multi-pole electric pulse thermal excitation according to claim 1 is characterized in that: The infrared non-destructive testing device for equipment defects is equipped with a series of testing fixtures, and the current output end of the cable bundle can be replaced and connected to different testing fixtures to be applied to the testing of equipment with different structures, shapes and sizes.

4. The portable infrared nondestructive testing device for equipment defects based on multi-pole electric pulse thermal excitation according to claim 3 is characterized in that: The series of detection fixtures include C-type fixtures, tiger clamp fixtures and optical fiber fixtures.

5. The portable infrared nondestructive testing device for equipment defects based on multi-pole electric pulse thermal excitation according to claim 1 is characterized in that: Each pulse current meter is equipped with a pulse current stepless adjustment knob and a pulse current status display screen.

6. The portable infrared nondestructive testing device for equipment defects based on multi-pole electric pulse thermal excitation according to claim 1 is characterized in that: The pulse current control module is electrically connected to each pulse current meter through a data line to control the pulse current excitation mode, thereby matching the infrared thermal imager to complete pulse current thermal excitation infrared non-destructive testing of different schemes.

7. The portable infrared nondestructive testing device for equipment defects based on multi-pole electric pulse thermal excitation according to claim 1 is characterized in that: The circulating cooling device includes an integrated box, a coolant storage tank and a centrifugal pump. The pulse current meter array is built into the integrated box, and multiple coolant pipelines are arranged in the integrated box. The coolant pipelines pass through the integrated box and are connected to the coolant storage tank and the centrifugal pump to form a circulating cooling loop. The centrifugal pump pumps the coolant in the coolant storage tank into the coolant pipeline.

8. The portable infrared nondestructive testing device for equipment defects based on multi-pole electric pulse thermal excitation according to claim 1 is characterized in that: The computing center includes a storage system, a network transmission system and a server. The infrared thermal imager is connected to the storage system to store the captured images on the storage system. The storage system is connected to the server through the network transmission system to transmit the stored images to the server for processing. Defect image enhancement and recognition software is installed on the server to perform image analysis and defect recognition.