Research on Temperature Property of Piezoelectric Vibration Accelerometer Based on Cymbal Transducer

摘要

The new type of piezoelectric vibration accelerometer was studied, which sensitive element is cymbal piezocomposite transducer with 2-(0)-2 connectivity rather than conventional piezoelectric ceramic. The temperature property of output voltage of this new piezoelectric vibration accelerometer was investigated. Put the temperature sensor DS18B20 into the vibration accelerometer to detect the inner temperature properties of the vibration accelerometer. Using microcomputer to record the static output voltage values and gained the relationship between the temperature and static output voltage. Designed the artificial neural network module and compensated the output voltage error produced by temperature drift. The result showed that the relative error of static output voltage was decreased from 26.73% to 3.66% in the temperature range of -20℃ to 60℃. The compensation method based on the artificial neural network can be used for compensating the temperature properties of output voltage sensitivity of vibration accelerometer.