Active Thermal Imaging Detection System Based On Android Mobile Phone

The traditional infrared thermal imaging defect detection system needs to use a fixed infrared thermal imager,which needs to be connected to a computer to complete the image acquisition,and need to export the collected image,with the assistance of other software to complete the image processing and defect details detection;As for the portable,hand-held infrared thermal imager,although the operation is simple and convenient to carry,but its built-in software program function is simple,still can not complete image processing independently,need to export the image to the computer before image processing.Neither of the above two methods can obtain real-time detection results in the field.In this thesis,in view of the problems existing in the above defect detection system,combined with the advantages of the application program that can be customized by smart phones,combined with FLIR one,the infrared thermal imager at the mobile phone end produced by FLIR company,the active infrared thermal imaging defect detection system is designed and implemented on the Android smartphone platform,which improves the data collection and processing efficiency,simple operation and high efficiency,And it is real-time.The main work is summarized as follows:(1)According to the actual demand of infrared thermal imaging defect detection,this thesis designs the active thermal imaging detection system at mobile phone end,including hardware selection and software design.The development environment,function framework,interface layout and operation flow of active thermal imaging detection system at mobile phone terminal are introduced in detail.The operation methods and implementation methods of the system are described in detail.(2)According to the characteristics of the collected hot image video,this thesis proposes a method of hot image video processing.The specific processing process is:first,the hot video is decoded into a frame-to-frame hot image sequence,and the main area is selected according to the demand to reduce the background interference;Then,the main component analysis of the thermal image sequence is carried out,the main component information of the thermal image is extracted and the thermal image is reconstructed;Finally,the reconstructed thermal image is grayed and threshold segmentation,so that the defect can be displayed as clearly as possible.(3)In order to verify the function and practical application feasibility of the mobile phone end thermal imaging system,three experiments are designed: the solar excitation thermal imaging experiment of standard defect experimental board,the halogen lamp excitation thermal imaging experiment of standard defect experimental board and the thermal imaging experiment of carbon fiber reinforced concrete halogen lamp.The results show that the active thermal imaging defect detection system designed in this thesis can be applied to the practical engineering detection.