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在进行土动力特性试验中,如象土的共振柱试验这类土和仪器联合振动系统的分析,需要测量振动系统的动态响应即测量振动系统的加速度。目前广泛采用通过压电式加速度传感器经电荷放大器放大后,由峰值电压表或有效值电压表检测加速度的峰值或有效值,以备分析之用。电荷放大器是动态测量中不可缺少的仪器,过去对这种仪器在出厂时一般只作静态标定,本文介绍了一种动态标定方法。
In the test of soil dynamic characteristics, such as soil resonance column test such earth and instrument joint vibration system analysis, the need to measure the dynamic response of the vibration system to measure the acceleration of the vibration system. Now widely adopted by the piezoelectric accelerometer amplified by the charge amplifier, the peak voltmeter or RMS voltmeter to detect the peak acceleration or RMS, for analysis purposes. Charge amplifier is an indispensable instrument for dynamic measurement. In the past, this instrument was usually only calibrated at the factory for delivery. This paper introduced a dynamic calibration method.