自1966年邢台地震后,地震系统开始研制、使用光记录水平摆倾斜仪。水平摆虽具有角放大倍率高,能较好地记录地倾斜的特点,但由于仪器洞室潮湿、台站供电不正常(停电或电压不稳定等),光源灯和时号灯常烧坏熄灭,推动钟(滚筒)生锈或发条、固紧螺钉、 Since the earthquake in 1966 in Xingtai, the seismic system began to be developed using optical recording horizontal tilt inclinometers. Although the horizontal pendulum has the advantages of high angular magnification, it can well record the characteristics of the incline. However, due to the humidity in the instrument room and abnormal power supply at the station (such as power failure or voltage instability), the light source and the hour light are often burned out , To promote the clock (roller) rusty or winding, fastening screws,