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| Hardware Technology of High Accuracy Measurement System for Ocean Tide Based on Image Processing |
| JIA Wei-guang1,JI Jian-hua2,MA Zhi-gang1,SI Jian-wen1,LI Xi-ling1,LIU Xiao-feng1 |
1. National Center of Oceanographic Standards and Metrology, Tianjin 300112, China;
2. Department of Information Engineering, Tianjin University Ren’ai College, Tianjin 301636, China |
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Abstract In order to further enhance the measurement and evaluation level of the ocean tide, an introduction of digital image processing and digital signal processor technology in the field is usel. Using DM642 as the core processor, this can have a design of video capture circuit, encoding and decoding circuit, external memory module circuit, hard simulation through JTAG simulation interface, to realize analog/digital conversion, and data transmission functions. At the same time, system software design can ensure that DM642 can achieve the purpose of real-time processing tide video by CCD, and the realization of real time display of tidal level video and high accuracy data. The system can meet the requirements of high precision, real-time tide detection and automation. The tide variation range of detection is 0~8 m, and the maximum error of indication is 1.2 mm, and the measurement maximum standard deviation can less than 0.42 mm.
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2015, Vol. 36 
