问题的提出佘山台是我国最早的一个地震记录台站,1908年增设了一台德制魏歇尔E、Wiechert无定向水平地震仪,从1909年4月13日开始就有地震记录资料,记录清晰,特别适宜于发生在亚洲地区的强震记录。仪器示意图见图1。仪器有两个自由度的无定向摆,置在卡登(Cardan)簧上。仪器的重锤重1200公斤。地震时仪器受到水平力作用,支架与重锤产生相对向运动(利用机械杠杆放大带动阻尼器及记 Proposed Sheshan station is one of the earliest earthquake recording stations in our country. In 1908, an additional German-made Wei and Wiechert seismograph was used. Seismograph records from April 13, 1909 were recorded. Clear, especially suitable for strong earthquakes that occur in Asia. Instrument diagram shown in Figure 1. The instrument has two degrees of freedom of the non-directional pendulum placed on the Cardan spring. The weight of the instrument is 1200 kg. Earthquake instrument by horizontal force, bracket and hammer to produce relative movement (using mechanical lever to enlarge and promote the damper and remember