A New Design of Charge Amplifier in Ultra-High Impact Data Acquisition System

摘要

At present, charge accelerometer has been used widely in impact and overloading measuring. And in data acquisition system we use charge amplifier to transfer charge signal to voltage signal. However, zero shift always appear in common charge amplify circuit. It will drop down the accuracy of data acquisition system. Even worse, in ultra-high impact condition the signal has been changed so enormously that the signal we get is not like the output of charge accelerometer a little. Based on this , we make some improvement with common amplify circuit in this article to solve this problem .The improved circuit can restrain zero shift very well .It will not change the characteristic of the signal at the same time.