由于工程结构比较复杂,在计算其振动时总要作一些假定,忽略一些因素,致使计算结果与实际情况可能有差异,因此要用测量方法得到确切的振动参量(频率、振幅、速度、加速度等)。为了测量振动参量,可制成位移型拾振器、速度型拾振器和加速度型拾振器。这些拾振器是振动测量的接收系 Due to the complicated structure of the project, some assumptions should always be made in the calculation of its vibration. Some factors are neglected. As a result, the calculation results may be different from the actual situation. Therefore, the exact vibration parameters (frequency, amplitude, velocity, acceleration, etc.) ). In order to measure the vibration parameters, it can be made as a displacement type vibration pickup, a speed type vibration pickup and an acceleration type vibration pickup. These vibration pickups are the receiving system for vibration measurement