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本文介绍了液压ＣＡＴ技术中被测信号在二次处理前的预处理的目的、任务、原理及结构设计。采用此预处理技术后，可节约二次处理的时间，提高和改善被测信号二次处理的质量及准确性。
This paper introduces the purpose, mission, principle and structure design of the pre-processing of the measured signal in the hydraulic CAT technology before secondary processing. The use of this pretreatment technology can save secondary processing time and improve and improve the quality and accuracy of secondary processing of the measured signal.