摘要
891型测振仪由拾振器和放大器组成。采用拾振器无源伺服技术,选取小运动质量的高自振频率往复摆,扩大了使用频率范围和幅值测量范围;采用了微型开关,与放大器放大、积分结合,实现了一机多用的目的,可测量位移、速度和加速度。使用频率范围为0.5—100HZ,最大可测位移为150mm,最大可测加速度为80m/s^2。可用于结构脉动测量、桥梁振动测量、桩基动测、波速测量、爆破中距离测量等。
Model 891 vibration measurer consists of six model 891 pickups(four horizontal, and two vertical) and an amplifier (six channels). The pickup utilizes passive servo technology, selects small mass and. high natural frequency linear pendulum. Both maximum amplitude and using frequency range are greatly extended. The pickup utilizes a microswitch to realize multi-parameter measure.The amplifier is used for amplification,integration and impedance conversion. Model 891 vibration measurer may be used for measuring acceleration, velocity and displacement. The bandwidth, of model 891 is 0.5 to 100 Hz, maximum amplitude is ±150 mm, maximum acceleration is ±80 m/s2. It may be used for measuring tremor, earthquake ground motion and engineering structure vibration (including micro-vibration, seismic vibration, heavy structural vibration, industrial vibration and nuclear explosion).
出处
《地震工程与工程振动》
CSCD
北大核心
1991年第3期94-101,共8页
Earthquake Engineering and Engineering Dynamics
