旋转机械在连续运转过程中,总会有振动发生。然而,振动过大将会危害机器的安全运行,因此人们总是力图把振动控制在最小允许范围之内。从发展来看,随着科学技术水平的提高,机械振动允许的振幅值应该愈来愈小,对振动监视的要求应该愈来愈高,对振动测量的要求也将愈来愈精确。随着我国电力工业的发展,各类振动表在汽轮发电机轴承上及其它转动机械上的应用越来越广泛,因此如何保持这些振动表计测量准确日益显得重要起来。目前,由于激光技术的 Rotating machinery in continuous operation, there will always be vibration. However, excessive vibration will endanger the safe operation of the machine, so people are always trying to keep the vibration within the minimum allowable range. From the development point of view, with the improvement of science and technology, the amplitude of vibration allowed by mechanical vibration should be getting smaller and smaller, the requirements for vibration monitoring should be getting higher and higher, and the requirements for vibration measurement will be more and more accurate. With the development of China’s electric power industry, various types of vibrating meters have become more and more widely used on turbine generator bearings and other rotating machinery. Therefore, how to keep accurate measurement of these vibrating meters becomes increasingly important. At present, due to the laser technology