脉搏传感器信号处理电路的设计

PVDF一级放大电路基线校正陷波器带通滤波器二级放大电路脉搏信号A/D转换器第6期··4.0×10-5A149.449.4/(1)2.6k19RA=−==ΩCCURCUiUUbUUoRRCCCRRCRkRRkRRCRRRCCCfk014(1)1QkRCω=⎧⎪−⎪⎨⎪=⎪⎩QkQQkUUCkQ012πfRC=RRRRRRkRRkRCCCCU5··fHfLfH-fLfHfLURRRRC11127812πHfRRCC=RRCCfHAuLRR14131uLRAR=+RRAuLURRRRCCRRCCLRRAuHURRRRR第6期··nnnRRRRDesignofsignalprocessingcircuitforPVDFtypepulsesensorLUChao(DepartmentofPhysics,ShanxiUniversityofTechnology,ShanxiHanzhong723000,China)··AbstractanewmethodforpulsesignalprocessisproposedaccordingtoPVDFtypepulsesensor.Pulsesignalprocesshardwarecircuitincludesfirstsignalamplificationcircuit,BaselineCalibrationcircuit,Band-passfiltercircuit,50HzNotchFiltercircuit,secondsignalamplificationcircuitetc.Medianfilteringalgorithmwasadoptedtoweakentheeffectofnoiseinsoftware.Thismethodisbettertorestorethetruepulsesignal,itisconducivetothepulsesignalmeasurementandmonitoring.Keywordspulsesignalamplificationcircuitpulsesensorfilter