Design of Signal Processing and Acquisition System for Piezoelectric Force Sensor
To solve the problem of processing and transmitting charge signals in rotary piezoelectric dynamometer,a signal processing and acquisition system based on piezoelectric force sensors was designed.The signal conditioning circuit based on ADA4530-1 was designed to convert and amplify the sensor output charge signals,and the analog-to-digital conversion was imple-mented based on STM32.The signal was wirelessly transmitted using a bluetooth module,and the upper computer software based on LabVIEW was built for force signal acquisition.The signal processing and acquisition system was tested using a standard piezo-electric sensor.The results show that the measurement error of the signal conditioning circuit module is below 0.2%,the wireless transmission function was normal,the upper computer software can collect force signal data in real time,and the relative error is below 0.5%,which meets the requirements.
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