反馈式地震计自校准实验方法及不确定度分析  

Feedback seismometer self-calibration test method and its uncertainty analysis

作　　者：王雷[1] 杨巧玉 马洁美[2] 龚飞 

机构地区：[1]中国地震局工程力学研究所地震工程与工程震动重点实验室,黑龙江哈尔滨150080 [2]中国地震局地球物理研究所,北京100081 [3]黑龙江省地震局,黑龙江哈尔滨150090

出　　处：《自然灾害学报》2016年第6期87-93,共7页Journal of Natural Disasters

基　　金：地震行业科研专项项目(201408005)~~

摘　　要：反馈式地震计自校准实验是首先在振动计量实验室利用低频振动台对地震计灵敏度进行校准,然后测定校准线圈相对灵敏度,最后利用校准线圈对地震计进行在线校准。利用上述实验方法,解决了地震计自校准灵敏度向振动计量标准的量值传递和可溯源问题。对宽频带地震计和强震加速度计进行了自校准实验,分析了采用自校准方法测定地震计灵敏度的相对扩展不确定度。Feedback seismometer self-calibration test includes three steps： first, calibrating the sensitivity of seis- mometer in vibration laboratory with low frequency shaking table, then measuring the relative sensitivity of calibra- tion coil; at last, on-line calibrating the seismometer by use of the calibration coil. Using this experiment method, the seismometer self-calibration sensitivity may be traced back to the vibration measurement standard. The broad- band seismometer and strong motion accelerometer were tested using self-calibration method and the relative expan- sion uncertainty of seismometer sensitivity was analyzed.

关 键 词：自校准 地震计 不确定度 校准线圈 

分 类 号：P315[天文地球—地震学]