一个地震仪,每天在不停运转,它的工作状态是否正常呢?靠什么来监视它呢,我们来介绍一种监视地震仪工作的方法——脉冲标定。什么脉冲标定?脉冲标定就在向拾震器的标定线圈里送一电脉冲,让拾震器在电脉冲冲击下运动,在地震记录图上就记录出一个电脉冲的响应。根据这个响应,我们就可以判断地震仪的放大倍数变了没变,工作状态正常与不正常。向拾震器送的脉冲可以是阶跃脉冲,也可以是方波脉冲,还可以是δ脉冲等等。我们向大 A seismograph, kept on working day by day, is it in a normal working condition? By monitoring what it is, let’s introduce a method of monitoring the operation of a seismograph - pulse calibration. What Pulse Calibration? Pulse calibration involves sending an electrical pulse to the calibration coil of the pick-up to allow the pick-up to move under the impact of the electrical impulses. An electrical pulse response is recorded on the seismogram. According to this response, we can determine that the magnification of the seismometer has not changed, and the working state is normal and abnormal. The pulse sent to the pickup can be a step pulse, a square wave pulse, a delta pulse, or the like. We are big