Airborne equipment high-voltage direct-current insulation performance detection and analysis system

Abstract

The invention belongs to the technical field of aviation electrical, and relates to a high-voltage direct-current insulation performance detection and analysis system for airborne equipment. Comprising an insulation and voltage resistance detection subsystem, an automatic insulation test subsystem, a partial discharge test monitoring subsystem and an insulation defect detection analysis subsystem, whether partial discharge occurs when high voltage is applied to a high-voltage direct-current power distribution product can be tested through acoustic, optical and electric signal acquisition and feature extraction, and the insulation performance of equipment can be represented more clearly.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of aviation electrical technology and relates to a high-voltage direct-current airborne equipment insulation performance test and analysis method. BACKGROUND

[0002] With the increase of the aircraft power supply voltage, great challenges are brought to the insulation of the aircraft electrical system, which easily leads to partial discharge (PD) of the insulation system, causes insulation damage, accelerates the insulation aging speed, and even causes breakdown failure, thereby causing serious damage to the aircraft.

[0003] The current detection method only tests the insulation dielectric and insulation resistance under normal temperature conditions, and some insulation materials do not have detection means for defects such as cable cracks, delamination, local damage, or other solid insulation material cracks, bubbles and other insulation defects. Especially under the condition of multi-physical field coupling, the electrical gap will change with the decrease of air pressure, the increase of pollution level, vibration impact and other environmental factors, thereby reducing the insulation capacity. Meanwhile, if the insulation material has insulation defects such as burrs, cracks, bubbles and impurities, these paths for charge movement will reduce the creepage distance, which may cause the two conductors to be connected, and the long-term operation of the product will cause cable aging or other insulation performance degradation. To solve this problem, other insulation detection means need to be added to diagnose and analyze the insulation defects or insulation performance degradation in a timely manner and effectively provide early warning to reduce the risk of arc in high-voltage products. SUMMARY

[0004] The application aims to provide an airborne equipment high-voltage direct-current insulation performance detection and analysis system.

[0005] Technical scheme An airborne equipment high-voltage direct-current insulation performance detection and analysis system comprises: An insulation withstand voltage detection subsystem for testing the insulation withstand voltage, insulation resistance and partial discharge of bare PCB and PCBA components through a flying needle test; An automatic insulation test subsystem for measuring the input and output signal insulation dielectric, insulation resistance and partial discharge of the product level through a circular connector; A partial discharge test monitoring subsystem for applying a kilovolt-level pulse voltage to the test object through a pulse voltage source, and monitoring the partial discharge phenomenon generated by the insulation withstand voltage detection subsystem and the automatic insulation test subsystem by using an ultrahigh-speed camera, a high-sensitivity ultraviolet camera, an online ultrasonic imager, a high-frequency pulse current transformer, an ultra-high frequency partial discharge sensor, a leakage current detection device and a partial discharge test and detection device; The insulation defect detection and analysis subsystem is in communication connection with the partial discharge test monitoring subsystem, and is used for detecting and analyzing the insulation defects. Through a large amount of and long-term data detection, the current, sound and image data of the insulation test are analyzed, the insulation defects of the product are analyzed through a big data model and artificial intelligence learning, and the product design improvement or regular maintenance can be guided. The test product is connected with the automatic insulation test subsystem through an automatic switching interface. The main control subsystem integrated test management software is used for applying control instructions to the insulation withstand voltage detection subsystem, the automatic insulation test subsystem, the partial discharge test monitoring subsystem and the insulation defect detection and analysis subsystem, so as to realize full-automatic test and data analysis, fault positioning and insulation fault early warning.

[0006] Further, the insulation withstand voltage detection subsystem provides a high-voltage test of a maximum of 5000V DC or 5000V AC.

[0007] Further, the insulation withstand voltage detection subsystem comprises a visual intelligent positioning unit and a precision mechanical motion system, wherein the visual intelligent positioning unit is used for controlling the flying needle to realize accurate positioning, and the precision mechanical motion system is used for controlling the flying needle to realize precision mechanical motion and controlling the PCB or PCBA of the test product to realize 360° overturning.

[0008] Further, the automatic insulation test subsystem comprises: the automatic insulation test subsystem applies a high-voltage signal through a cable to perform product-level insulation resistance test, insulation dielectric test and partial discharge test; and supports multi-channel signal automatic switching test.

[0009] Further, the partial discharge test monitoring subsystem is used for monitoring the insulation withstand voltage detection subsystem and the automatic insulation test subsystem, specifically: during the insulation resistance test, the voltage, current and insulation impedance are detected in real time; during the insulation dielectric test, the voltage, current and dielectric strength are detected; the online ultrasonic imager is used for collecting, identifying and positioning the ultrasonic waves during high-voltage discharge; and the ultra-high-speed camera and high-sensitivity ultraviolet camera are used for capturing images of the partial discharge and positioning the faults when the discharge occurs.

[0010] Further, the insulation defect detection and analysis subsystem, in combination with the partial discharge test monitoring subsystem, detects and analyzes the insulation defects. The partial discharge test monitoring subsystem transmits the collected voltage, current, resistance, sound wave and image to the insulation defect detection and analysis subsystem. The insulation defect detection and analysis subsystem analyzes the voltage, current, resistance, sound and image data of the insulation test through a large amount of and long-term data detection, extracts features through a model algorithm, and analyzes the insulation defects of the product through a big data model and artificial intelligence learning, so as to guide the product design improvement or regular maintenance.

[0011] Furthermore, the insulation defect detection and analysis subsystem includes: a signal generator, a power amplifier, a high-precision analog acquisition device, and a signal processor. The signal generator and power amplifier are used to generate pulse voltage signals, which are applied to the test object. The signals are acquired by the online ultrasonic imager of the partial discharge test monitoring subsystem and transmitted to the high-precision analog acquisition device, where they are processed by the signal processor to determine whether the test object has generated partial discharge.

[0012] Furthermore, the automatic insulation testing subsystem is used to test the insulation dielectric, insulation resistance, and partial discharge status of the ELMC and RPDU of the test specimen.

[0013] Beneficial effects: This invention can test whether partial discharge occurs when high voltage is applied to high voltage DC power distribution products by collecting sound, light and electrical signals and extracting features, thus more clearly characterizing the insulation performance of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a high-voltage DC insulation performance detection and analysis system for airborne equipment according to the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0018] In the description of this invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the invention, and should not be construed as limiting the invention. Furthermore, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0020] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0022] like Figure 1A high-voltage DC insulation performance testing and analysis system for airborne equipment is disclosed. This system can be used for testing and analyzing insulation dielectric, insulation resistance, and partial discharge indicators at the high-voltage DC PCBA board level and the overall product level. It possesses insulation defect monitoring, feature extraction and analysis capabilities, and insulation fault location functions. The system includes a board-level insulation withstand voltage testing platform, whose main function is to test the insulation withstand voltage, insulation resistance, and partial discharge of bare PCB and PCBA components; a product-level automatic insulation testing platform, whose main function is to measure the insulation dielectric, insulation resistance, and partial discharge of product-level input and output signals through circular connectors; and a partial discharge monitoring platform, which monitors the partial discharge phenomena generated by the board-level insulation withstand voltage testing platform and the product-level automatic insulation testing platform using high-speed cameras, high-speed current and voltage sensors, etc., and connects to an insulation defect analysis system to detect and analyze insulation defects. Through extensive and long-term data testing, the system analyzes the current, sound, and image data of the insulation tests. Using big data models and artificial intelligence learning, it analyzes the insulation defects of the products, guiding product design improvements or periodic maintenance.

[0023] The system performs the following process: 1) The platform for board-level insulation withstand voltage testing enables insulation resistance testing, insulation dielectric testing, and partial discharge testing of PCB (bare board) or insulation resistance testing, insulation dielectric testing, and partial discharge testing of PCBA (assembled). 2) The board-level insulation withstand voltage testing platform provides high-voltage testing up to 5000VDC or 5000VAC; and can be programmably controlled to achieve voltage control. 3) The board-level insulation withstand voltage testing platform has a probe testing function. The probe can be accurately positioned on the test point of the PCB or PCBA. After the probe moves to the test point, the voltage is increased. After the test is completed, the probe discharges and leaves the test point. 4) The board-level insulation withstand voltage testing platform can be programmed via software to achieve fully automated testing; 5) The board-level insulation withstand voltage testing platform can be matched with the insulation discharge monitoring system to realize leakage current detection, partial discharge detection, fault location, fault analysis and other tasks. 6) The product-level automatic insulation testing system applies a high-voltage signal to the cable and has product-level insulation resistance testing, insulation dielectric, and partial discharge testing functions; it supports automatic switching of multiple signals to improve testing efficiency; it can be programmed through software to achieve fully automated testing; it can be matched with an insulation discharge monitoring system to realize leakage current detection, on-site detection of internal discharge of the product, fault location, fault analysis, and other tasks.

[0024] 7) The insulation discharge monitoring system mainly provides comprehensive monitoring for the insulation withstand voltage testing system and the automatic insulation testing system. It has the following functions: during insulation resistance testing, it performs real-time detection of voltage, current, and insulation impedance, and automatically stores the data; during insulation dielectric testing, it detects voltage, current, and dielectric strength, and automatically stores the data; it has ultrasonic detection capabilities, collecting, identifying, and locating ultrasonic waves during high-voltage discharge; it has image capture capabilities, capturing images of partial discharges and locating faults during discharge; and it has system fault detection and hazard alarm functions. 8) The insulation discharge monitoring system works in conjunction with the insulation withstand voltage testing system and the automatic insulation testing system.

[0025] 9) The insulation defect detection and analysis system, combined with the insulation discharge monitoring system, is mainly used to detect and analyze insulation defects. The insulation discharge monitoring system transmits the collected information such as voltage, current, resistance, sound waves, and images to the insulation defect detection and analysis system. The analysis system analyzes the voltage, current, resistance, sound, and image data of the insulation test through a large amount of long-term data detection. Through model algorithms, it performs feature extraction and analyzes the insulation defects of the product through big data models and artificial intelligence learning, which is helpful in guiding product design improvements or regular maintenance.

[0026] 10) The insulation defect detection and analysis system has the following functions: large-capacity data storage function; signal processing function, which can extract features such as voltage, current, resistance, sound waves, and images during discharge to form discharge feature data; image recognition function; model calculation function; self-learning function; and ultrasonic guided wave non-destructive testing function.

[0027] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An airborne equipment high voltage direct current insulation performance detection and analysis system, characterized in that, include: The insulation withstand voltage testing subsystem is used to test the insulation withstand voltage, insulation resistance, and partial discharge of bare PCB and PCBA components using flying probe testing. The automated insulation testing subsystem is used to measure the dielectric strength, insulation resistance, and partial discharge of product-level input and output signals via circular connectors. The partial discharge test monitoring subsystem is used to apply a kilovolt-level pulse voltage to the test sample through a pulse voltage source, and to monitor the partial discharge phenomena generated by the insulation withstand voltage test subsystem and the automatic insulation test subsystem using an ultra-high speed camera, a high-sensitivity ultraviolet camera, an online ultrasonic imager, a high-frequency pulse current transformer, an ultra-high frequency partial discharge sensor, leakage current detection equipment, and partial discharge test and detection equipment. The insulation defect detection and analysis subsystem communicates with the partial discharge test monitoring subsystem and is used to detect and analyze insulation defects. Through large-scale and long-term data detection, it analyzes the current, sound, and image data of insulation tests. Through big data models and artificial intelligence learning, it analyzes the insulation defects of products and can guide product design improvements or regular maintenance. The test sample is connected to the automatic insulation testing subsystem via an automatic switching interface; The integrated test management software for the main control subsystem is used to apply control commands to the insulation withstand voltage testing subsystem, automatic insulation testing subsystem, partial discharge testing monitoring subsystem, and insulation defect detection and analysis subsystem, so as to realize fully automated testing and perform data analysis, fault location, and insulation fault early warning.

2. The system of claim 1, wherein, The insulation withstand voltage testing subsystem provides high-voltage testing up to 5000VDC or 5000VAC.

3. The system of claim 1, wherein, The insulation withstand voltage testing subsystem includes a visual intelligent positioning unit and a precision mechanical motion system. The visual intelligent positioning unit is used to control the flying probe to achieve precise positioning, and the precision mechanical motion system is used to control the flying probe to achieve precision mechanical motion and to control the PCB or PCBA of the tested object to achieve 360° rotation.

4. The system of claim 1, wherein, The automatic insulation testing subsystem includes: applying a high-voltage signal to the cable to perform product-level insulation resistance testing, insulation dielectric testing, and partial discharge testing; and supporting automatic switching testing of multiple signals.

5. The system of claim 1, wherein, The partial discharge test monitoring subsystem is used to comprehensively monitor the insulation withstand voltage test subsystem and the automatic insulation test subsystem. Specifically, during insulation resistance testing, it monitors voltage, current, and insulation impedance in real time; during insulation dielectric testing, it monitors voltage, current, and dielectric strength; the online ultrasonic imager is used to collect, identify, and locate ultrasonic waves during high-voltage discharge; and the ultra-high-speed camera and high-sensitivity ultraviolet camera are used to capture images of partial discharge and locate faults when discharge occurs.

6. The system of claim 1, wherein, The insulation defect detection and analysis subsystem is combined with the partial discharge test monitoring subsystem to detect and analyze the insulation defects. The partial discharge test monitoring subsystem transmits the collected voltage, current, resistance, sound wave and image to the insulation defect detection and analysis subsystem. The insulation defect detection and analysis subsystem analyzes the voltage, current, resistance, sound and image data of the insulation test through a large amount of and long-term data detection, performs feature extraction through a model algorithm, analyzes the insulation defects of the product through a big data model and artificial intelligence learning, and guides the product design improvement or regular maintenance.

7. The system of claim 1, wherein, The insulation defect detection and analysis subsystem comprises a signal generator, a power amplifier, a high-precision analog acquisition device and a signal processor. The signal generator and the power amplifier are used to generate a pulse voltage signal and apply the pulse voltage signal to the test product. The online ultrasonic imager of the partial discharge test monitoring subsystem collects and transmits the pulse voltage signal to the high-precision analog acquisition device, and the signal processor processes the pulse voltage signal to determine whether the test product generates partial discharge.

8. The system of claim 1, wherein, The automatic insulation test subsystem is used to test the insulation dielectric, insulation resistance and partial discharge of the ELMC and RPDU of the test product.

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