压电加速度传感器输出信号可变增益控制  

Variable Gain Control for the Piezoelectric Acceleration Sensor Output Signal

作　　者：张建新[1] 张合[1] 

机构地区：[1]南京理工大学智能弹药技术国防重点学科实验室,江苏南京210094

出　　处：《测试技术学报》2011年第4期332-336,共5页Journal of Test and Measurement Technology

摘　　要：针对压电加速度传感器信号调理电路中标定过程繁琐、标定效率低下、系统在运行过程中输出信号增益不能改变的问题,提出了在电荷放大器之后由微控制器控制数字电位器组成可调增益的电压放大电路,实现加速度计输出信号的自动标定和增益的可变控制.分析压电式加速度计的信号调理电路,在电压放大电路中选择使用数字电位器的方法实现可变增益控制,并分析其作用过程.通过此电路在传感器电路标定和弹丸整个弹道过程中过载信号的采集两方面应用试验,表明该方法能够方便、准确实时调整压电加速度传感器输出信号的增益,符合使用要求.Aiming at the problems of cumbersome circuit calibration process, low calibration etficiency, m- variable gain when the system is running, we proposed a gain - adjustable signal conditioning circuit of the pi- ezoelectric acceleration sensor. The circuit employed a micro controller controlled digital potentiometer after the charge amplifier to achieve the automatic calibration and variable gain control of the accelerometer output signal. This circuit has been applied to the sensor circuit calibration and the overload signal acquisition during the ballistic trajectory. Experiment results show that this circuit can easily and accurately adjust the gain of pi- ezoelectric acceleration sensor output signal in real time.

关 键 词：信号调理 加速度传感器 数字电位器 可变增益 传感器标定 

分 类 号：TJ013.2[兵器科学与技术—兵器发射理论与技术]