The Research And Application Of Electrical Equipment Detect System Base On Infrared And Visible Light Image Registration

As one kind of the fast, non-destructive, non-contact state detection technologies, the detection of infrared thermographic can carry out fault inspecting and diagnosing without influencing the production process. With the development of the devices of the infrared temperature measurement in recent years, infrared thermal imaging detection technology has gained popularity rapidly in the fault inspecting of the power system. Nevertheless, current stage of infrared thermal imaging detection still rely on artificial manner, which makes it very difficult to effectively integrate such kinds of the devices of infrared temperature measurement. Hence, the efficiency and accuracy of detection cannot be guaranteed. In this thesis, the application requirements of current electrical equipment of the infrared detection are investigated comprehensively. The investigation leads to the focus of the calibrating of the thermal imaging cameras, infrared and visible image registration of high voltage switchgears. Finally, the research results are applied in the automated intelligent detection system of substations equipment.The main work of this thesis is organized as follows:In preliminary, the background, significance and current trend of the infrared thermographic detection technology in the power system are introduced. And a brief description of the arrangement of this thesis is presented.In chapter two, the imaging model of the infrared thermal cameras and some traditional visible light camera calibration algorithms are introduced. Through considering the imaging characteristic of infrared thermal cameras, a calibration system based on trinocular vision, which is applicable to infrared thermal cameras, is presented. In the end, the experiment results show that the calibrating precision can meet the application requirement.The image registration algorithms and the transformation model of image are summarized in chapter three. Then the merits and demerits of registration algorithms are analyzed. According to the specific applications of substation equipments and the characteristic of infrared images, a new registration algorithm of infrared and visible image, which is suitable for high voltage switchgear infrared windows environment, is proposed in this thesis. In this algorithm, we firstly use the calibrated infrared thermal camera and visible light camera to shoot the device in switchgear. Then the infrared image and visible image are registrated and saved by manually using the epipolar constraint. Given an infrared image, we can use its SURF features to do the matching with the template infrared image. Finally, the registration result of the infrared image and visible image are obtained. The experimental results of the algorithm are also presented in this chapter.In chapter four, the project background of the substation high-voltage integrated temperature monitoring system is introduced. The requirement analysis, framework design, database design and structure design of the system are presented. The hardware and software environment of the system is presented after introducing the workflow of the system.The key technologies and the implementation of the system are introduced in chapter five.In chapter six, a conclusion of the whole thesis and the future work are presented.