论文部分内容阅读
一、前言在岩体土力学科研中,需要测定岩土在爆炸振动情况下的动力学参数,如加速度、速度、位移、压力等. 为了获得所需参数的测量,采用压电晶体加速度计作为传感元件,以测量爆破振动加速度.它有如下优点:体积小、灵敏度高、被测振动频率范围宽. 放大器要满足爆破测量要求,能适用于强烈爆破振动加速度测量是困难的,因为前置放大器不仅要有高输入阻抗,而且要耐震,能承受较高的瞬态冲击电压而不被击穿,并且传输
I. INTRODUCTION In rock and soil mechanics research, it is necessary to determine the dynamic parameters of rock and soil under explosive vibration, such as acceleration, velocity, displacement, pressure, etc. In order to obtain the required parameters, a piezoelectric crystal accelerometer Sensing element to measure the vibration acceleration of blasting.It has the following advantages: small size, high sensitivity, wide range of vibration frequency to be measured.Amplifier to meet the requirements of blasting measurement, can be applied to blasting vibration acceleration measurement is difficult, because the front The amplifier must not only have high input impedance, but also be earthquake resistant, withstand high transient surge voltage without breakdown, and transmit