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介绍采用光学ＣＴ及ＣＣＤ技术的大坝位移自动检测系统中结合采用数字信号的信息提取方法，对该方法在各种具体情况下处理信号的结果进行分析。
This paper introduces the information extraction method of digital displacements in dam displacement automatic detection system using optical CT and CCD technology and analyzes the results of signal processing in various concrete conditions.