Electrical equipment defect detection method based on fusion of ultraviolet video and infrared video

Abstract

The invention discloses an electrical equipment defect detection method based on fusion of an ultraviolet video and an infrared video. The electrical equipment defect detection method comprises the following steps: ultraviolet images and infrared images of electrical equipment are obtained, and meanwhile, high accuracy, position posture and time synchronization information of the electrical equipment are recorded at the time of shooting and imaging; according to any frame of the shot ultraviolet images and infrared images of the electrical equipment, multiple frames of continuous images previous to and following the frame are selected for automatic registration; the ultraviolet images and infrared images after the registration are subjected to heterologous data frame alignment based on a timestamp; the ultraviolet images are subjected to mean filtering, threshold segmentation, light spot detection, region growing and light spot clustering analysis to obtain discharge points; the infrared images are subjected to image mosaic, region segmentation, target extraction and temperature retrieval to obtain temperature anomaly; discharge and temperature conjoint analysis is conducted in combination with the ultraviolet images and infrared images after processing to obtain a diagnosis result report finally. The electrical equipment defect detection method based on fusion of the ultraviolet video and the infrared video is high in automation degree, efficient in detection and simple in operation.

Description

technical field [0001] The invention belongs to a detection method applied in the field of electric power industry, and specifically refers to a defect detection method of electric power equipment based on the fusion of ultraviolet video and infrared video. Background technique [0002] Conductors and electrical appliances, when the voltage and current do not exceed the rated value, the conductors and electrical appliances can operate safely and economically for a long time. When the conductor works normally, various losses will occur: the conductor passes through the current, the resistance loss caused by its own resistance; the dielectric loss in the insulating material; the metal parts around the conductor, under the action of the electromagnetic field, cause eddy current and hysteresis loss. These losses occur partial discharge under the action of a strong electric field, resulting in local damage to the organic electrolyte and even penetrating breakdown of the insulatio...

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Problems solved by technology

[0004] However, inter-frame difference for target detection has the following disadvantages: 1. It is not applicable to the situation where the target and the background are not moving but the detector is moving, and the complete area of ​​the object cannot be extracted

The observation method is to directly observe the power equipment with a high-power telescope. This method is not easy to find the fault of the equipment, and the detection result is not reliable; the ultrasonic method uses the ultrasonic generator to transmit the initial pulse into the power equipment medium. location to judge the defects of electrical equipment. This method has high sensitivity, fast speed, low cost, simple operation, safety and reliability, but it is difficult to locate the long-distance discharge point intuitively and accurately, and quantitative analysis is also very difficult; infrared imaging method is Use the external temperature rise of electrical equipment to find certain defects. This method can be carried out without contacting electrical equipment and without power supply. However, this method of determining electrical equipment faults by measuring temperature is vulnerable to sunlight, strong wind, moisture, Images of ambient temperature and some factors that can cause rapid changes in surface temperature of high-voltage equipment

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