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时频联合分析地震计正弦标定数据
Time-frequency joint analysis on sine calibration data of seismometer
【摘要】 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。
【Abstract】 In this article,the authors describe the short-time Fourier transform.Introduce the characteristics 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 accurately identify each sine calibration signal frequency and amplitude,and then calculate the velocity response sensitivity of seismometer.
【关键词】 地震计;
正弦标定;
短时傅里叶变换;
时频联合分析;
【Key words】 seismometer; sine calibration; short-time Fourier transform; joint of timefrequency analysis;
【Key words】 seismometer; sine calibration; short-time Fourier transform; joint of timefrequency analysis;
【基金】 中国地震局地震预测研究所基本科研业务费专项(编号2010IES0201)资助
- 【文献出处】 地震地磁观测与研究 ,Seismological and Geomagnetic Observation and Research , 编辑部邮箱 ,2014年Z1期
- 【分类号】P315.62
- 【被引频次】2