Non-linear Error Compensation of Voltage Sensitivity for Vibration Accelerometer Based on Cymbal Transducer
A new type of piezocomposite vibration acceleration sensor was studied, which sensitive element consists of Cymbal transducer. The amplitude and frequency characteristics of this new vibration acceleration sensor and nonlinear characteristic of output voltage sensitivity were investigated. The least squares approximation method, partition linear interpolation and average value filter methods were employed to carry out non-linear error compensation of output voltage sensitivity. The experimental results shown that the non-linear error of output voltage sensitivity can be 0.6％ or less than 0.6％ after the non-linear error compensation was made. Micro-controller unit (MCU) was used to data logging, and the least squares approximation method was used to carry on fitting a straight line and establish the non-linear compensation data table. Every time 8 points sampling values are collected, which are used to obtain an average value as the actual sampling value, so the unwanted signal can be filtered, the accuracy of the sampling value can be improved.
Cymbal transducer Vibration accelerometer Voltage sensitivity Non-linear error compensation Least Squares Method MCU
Liang Shuang Li Denghua Gao Xiangyu
Beijing Information Science & Technology University,Beijing China 100085
国际会议
西安
英文
2007-08-16（万方平台首次上网日期，不代表论文的发表时间）