地震地磁观测与研究
地震地磁觀測與研究
지진지자관측여연구
SEISMOLOGICAL AND GEOMAGNETIC OBSERVATION AND RESEARCH
2014年
1期
231-235
,共5页
刘明辉%林湛%周银兴%马士振%崔仁胜%吴卫远
劉明輝%林湛%週銀興%馬士振%崔仁勝%吳衛遠
류명휘%림담%주은흥%마사진%최인성%오위원
地震计%正弦标定%短时傅里叶变换%时频联合分析
地震計%正絃標定%短時傅裏葉變換%時頻聯閤分析
지진계%정현표정%단시부리협변환%시빈연합분석
seismometer%sine calibration%short-time Fourier transform%joint of time-frequency analysis
介绍短时傅里叶变换,分析地震计正弦标定信号的特点,提出基于时间域和频率域联合分析正弦标定波形组起始点的方法,可以准确找出每组正弦标定信号的频率和振幅,计算地震计的速度响应灵敏度。
介紹短時傅裏葉變換,分析地震計正絃標定信號的特點,提齣基于時間域和頻率域聯閤分析正絃標定波形組起始點的方法,可以準確找齣每組正絃標定信號的頻率和振幅,計算地震計的速度響應靈敏度。
개소단시부리협변환,분석지진계정현표정신호적특점,제출기우시간역화빈솔역연합분석정현표정파형조기시점적방법,가이준학조출매조정현표정신호적빈솔화진폭,계산지진계적속도향응령민도。
In this article,the authors describe the short-time Fourier transform.Introduce the char-acteristics of the sine calibration signal of seismometer in time domain and frequency domain, propose an algorithm for identifying the starting and ending points in calibration data base on the joint of time-domain and frequency domain first time.Using this algorithm,we can accu-rately identify each sine calibration signal frequency and amplitude,and then calculate the velocity response sensitivity of seismometer.