目前台站测震手段大都使用DD—1型短周期地震仪记录地震。该地震仪装有一个地震报警器。由于该报警器的抗干扰能力差,所以平时乱报警。为了提高报警器的抗干扰能力,往往是把警报器的灵敏度调到最小,这样也不解决根本问题。而且由于灵敏度调小,使得一般的地震来了不报警,常常造成地震波形重迭。不但影响地震图纸的质量,而且也给分析地 At present, most stations measure seismic data using DD-1 short-period seismograph to record earthquakes. The seismograph is equipped with an earthquake alarm. Due to the anti-interference ability of the alarm is poor, so usually chaos alarm. In order to improve the anti-jamming ability of the alarm, it is often to minimize the sensitivity of the alarm, which does not solve the fundamental problem. And due to the sensitivity of small, making the general earthquake came without warning, often resulting in seismic wave overlap. Not only affect the quality of seismic drawings, but also to analyze