基于TMS320DM642的變電站開關設備開合狀態(tài)圖像識別的研究
[Abstract]:Article 2.3.6.5 of the State Power Grid Company's Power Safety working Code (Substation part) sets out the requirements for double confirmation of remote control switch operation. No staff member confirms that the mechanical instructions will not meet the requirements of the safety regulations at the operation site of the knife brake. This problem restricts the development of unattended and one-key sequential control technology in intelligent substation. Therefore, this paper designs a set of substation switchgear open and close state image recognition system to solve this problem. In this paper, the algorithm used in switching image recognition technology is studied. The SIFT scale invariant feature transformation algorithm is used to accurately locate the switching image, and the key information of the foreground (switch) region is extracted through the grayscale and binarization of the image. The Hough transform algorithm is used to detect the straight line, and the open and close state of the switch is judged, and the recognition results are obtained. In the aspect of hardware design, this paper introduces the characteristics and internal resources of the DSP master chip TMS320DM642 used in the identification system, and designs the whole structure scheme of the switch image recognition system with the main part of the system: the CCD camera acquires the switch image, and uses the CCD camera to collect the switch image. After the switch image is converted by SAA7115HL decoding chip, the digital signal in YUV format is output to TMS320DM642, TMS320DM642. First, the input digital image is cached, and the cached image is recognized and processed to output the final recognition result. Then the circuit schematic diagram of each module of the recognition device is given, including video image acquisition module, external memory module (SDRAM,FLASH), power module, clock module and serial communication module. Then the software design principle of the whole recognition system is described, including the loading and starting of the DSP chip program, the initialization of each module of the system, the configuration of the key parameters and the analysis of the key instructions of the switch image processing module. Finally, based on the advantages of MATLAB in image processing and visualization, the recognition system is tested and verified by debugging with DSP development environment CCS. The results show that the recognition effect of the algorithm is good, and the recognition system can quickly identify the open and close state of the switch, and meet the functional expectations of the design.
【學位授予單位】:山東科技大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TM63
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