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热轧带钢厚差诊断专家系统是基于传感器型的在线实时专家系统， 数据采集与处理系统是该专家系统的重要组成部分。精轧机组信号由传感器采集后， 需进行预处理。数据预处理包括三次预处理， 一次预处理包括速度折算、温度趋势项消除， 使影响厚差的各因素变量周期和幅值不经常改变；二次预处理包括低通滤波和高通滤波； 三次预处理是对低通滤波和高通滤波后的信号分别进行频谱分析， 得到特征参数并进行模糊处理。处理后的数据便可以用于厚差诊断专家系统的推理， 以提高厚差专家系统的命中率。
The hot strip thickness difference diagnosis expert system is based on the sensor type online real-time expert system. The data acquisition and processing system is an important part of the expert system. Finishing mill signals collected by the sensor, the need for pretreatment. Data preprocessing includes three pretreatments, one preprocessing including velocity conversion and elimination of temperature trend items so that the period and amplitude of each variable affecting the thickness difference do not change frequently; the second preprocessing includes low-pass filtering and high-pass filtering; the third pre-processing Processing is the low-pass filter and high-pass filtered signal spectrum analysis, the characteristic parameters and fuzzy processing. The processed data can be used to infer the thickness difference expert system to improve the accuracy of the expert system.