基于数字图像处理的高精度海洋潮位计量检测技术

将数字图像处理和数字信号处理技术应用于海洋潮位测量领域。采用DM642作为核心处理器,设计视频获取、编解码、外部存储器模块等硬件电路,通过JTAG仿真接口进行硬仿真;选择二阶识别算子,设计系统软件,确保DM642可实时处理CCD获取得到的潮位视频。该系统可满足潮位检测的高精度、实时性和自动化要求,可检测的潮位变化量程为0～8m、最大示值误差为1.2mm、测量最大标准偏差为 0.42mm。

Hardware Technology of High Accuracy Measurement System for Ocean Tide Based on Image Processing

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.