摘要
合理选择速度传感反馈地震计的工作线圈参数,使之与第一级运算放大器的噪声参数"匹配",就可以设计出自身噪声较低的反馈地震计。探讨了在追求地震计自身噪声最低的前提下工作线圈参数与第一级运放噪声参数之间的关联匹配问题,并给出了定量计算公式。本文用等效地动速度来研究反馈地震计的噪声问题,不仅避免了不同反馈方案的影响,而且使研究结果可直接与最安静台址噪声谱对比,效果直观明了。
Both selecting the suitable parameters for the working loop of velocity sensor of feedback seismometer and making it match the first operating amplify parameters are very important factors for the feedback seismometer to be low noise instrument. The calculating formulae are put forward. The matching problems between the background noise level of the seismic station and the sensitivity of the selsmometer are discussed. The seismometer installed in the quietest seismic station designed by this method is satisfied.
出处
《四川地震》
2008年第3期1-7,30,共8页
Earthquake Research in Sichuan
关键词
等效地动速度噪声
电压噪声
电流噪声
1/f噪声
转折角频率
velocity noise of equivalent ground movement
voltage noise
current noise
1/f noise
transition angle frequency