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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 vibrometer consists of a vibrator and amplifier. Using the passive servo technology of the vibration picker, the reciprocating pendulum with high vibration frequency of small motion quality is selected, and the frequency range and amplitude measurement range are expanded; the micro switch is used, and the amplification and integral of the amplifier are combined to achieve the purpose of multiple use of one machine. Measure displacement, speed and acceleration. The use frequency range is 0.5-100HZ, the maximum measurable displacement is 150mm, and the maximum measurable acceleration is 80m/s~2. It can be used for structural pulsation measurement, bridge vibration measurement, pile foundation dynamic measurement, wave velocity measurement, blasting middle distance measurement and so on.