电指纹法FSM(Field Signature Method)是一种以欧姆定律为理论基础的、新型的管道腐蚀监测技术。通过对FSM腐蚀监测系统采集的数据进行分析，指出了电压数据中噪声干扰以及FC值中基线漂移的问题。采用SG滤波的方式有效地降低了噪声干扰，同时，分析了指纹系数(FC)值基线漂移产生的原因，并通过残差均方值甄别了基线中的全面腐蚀信息。这对于FSM数据进一步研究有较好的参考意义。

FSM (Field Signature Method) is a new method based on Ohm′s law to monitor pipeline corrosion. This paper analyzed the data of FSM system, and pointed out the problems of the noises in the voltage data and baseline drift in fingerprint coefficenrt (FC). Savitzky-Golay filter mrthod was used to reduce the noises, the reason of FC′s baseline drift was anolyzed, and the general corrosion information in baseline was discriminated by quadratic mean of residuals.