基于非对称传感器的地震预警与烈度速报综合用烈度仪

摘要

In this paper,typical methods of earthquake early warning and intensity reporting are analyzed,and an asymmetric sensor based seismic intensity instrument is proposed for earthquake early warning and seismic intensity rapid reporting.This instrument is composed by an asymmetric threecomponent accelerometer and a special data collector built by the ARM embedded system.Through tests,the special data collector has a dynamic range greater than 107 dB.In the asymmetric threecomponent accelerometer,the selected class B accelerometer holds a measuring error less than 0.8％ and a dynamic range greater than 105 dB.The selected class C accelerometer holds a measuring error less than 5％ and a dynamic range greater than 61 dB.Therefore,the instrument meets the technical requirements for the comprehensive application of earthquake early warning and seismic intensity rapid reporting.Also,the instrument has the characteristics of low cost and low power consumption,and is suitable for density applications.%对典型的地震预警与烈度速报方法进行分析,提出了基于非对称传感器的地震预警与烈度速报综合用烈度仪,其由非对称结构的三分量传感器和基于ARM嵌入式系统的专用数据采集器组成.经过测试,该地震烈度仪的专用数据采集器具有大于107 dB的动态范围;其非对称三分量传感器结构中,所选的单分量B类传感器的加速度误差小于0.8％,动态范围大于105 dB,而所选的三分量C类传感器的加速度误差小于5％,动态范围大于61 dB.该地震烈度仪的各项指标均满足地震预警与烈度速报综合应用的各项技术要求,且功耗低、成本低,适合于高密度布设.