Power equipment infrared temperature measurement local structure radiance parameter calibration method

Abstract

The invention provides a power equipment infrared temperature measurement local structure radiance parameter calibration method, belongs to the field of power equipment state evaluation, and can accurately identify and calibrate radiance of different local structures of power equipment in an infrared image. Comprising the following steps: combining FLIR TOOL software of the FLIR company and writing a batch processing program by itself to carry out infrared image preprocessing on an original thermogram containing a watermark, a color table, a target point, a line, a frame and temperature information corresponding to the watermark, the color table, the target point, the line and the frame; labeling the local structure of the power equipment in the preprocessed infrared image by using the label Img software; then, an improved SSD algorithm is adopted to carry out automatic identification of a local structure so as to realize effective identification of structures with different sizes; the method comprises the following steps: identifying a structure name of a local structure, automatically searching a corresponding radiance through the identified structure name to obtain an actual radiance of the structure, finally carrying out region segmentation on the local structure, and re-assigning a radiance parameter of an image region corresponding to the local structure to realize radiance parameter calibration.

Description

technical field [0001] The invention belongs to the field of electric equipment state assessment, in particular to the field of infrared temperature measurement local structure emissivity parameter calibration of electric equipment. Background technique [0002] Infrared diagnostic technology is a non-contact measurement technology. It is based on the infrared detection image of the diagnosed target and the infrared radiation information of the detection target in the image. Make a scientific judgment on the status, if there is a fault, it can provide strong technical support for the formulation of the maintenance plan. The application of infrared technology in the power system can find the internal and external defects of the equipment by analyzing the infrared images of the substation equipment. Many faults that cannot be detected by conventional power outage test methods or are inconvenient to detect can be detected by infrared thermal imaging when the equipment is runnin...

AI Technical Summary

Problems solved by technology

However, when performing general infrared diagnosis on power equipment, the emissivity of the infrared thermal imager is generally set to 0.91 and will not change, resulting in inaccurate temperature measurement results, and different structures of the same equipment will have different emissivity due to different materials. Similarly, it is necessary to correct the radiance parameters of the infrared image according to the different structures of the equipment

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