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时频联合分析地震计正弦标定数据
Analysis sine calibration data of seismometerwith time—frequency joint
- DOI:
- 作者:
- 刘明辉1) 林 湛1) 周银兴1）马士振2）崔仁胜1) 吴卫远3）
Liu Minghui1) Lin Zhan1) Zhou Yingxing1）Ma Shizhen2）Cui Rensheng1) Wu Weiyuan3）
- 作者单位:
- 1) 中国北京 100036 中国地震局地震预测研究所2) 中国北京 100080 北京市地震局3) 中国北京 102628 北京港震机电技术有限公司
1) Institute of earth science China earthquake administration, Beijing 100036 China2) Earthquake Administration of Beijing, Beijing 100080 China3) Beijing Gangzhen Mechanical & Electronic Technology, Beijing 102628 China
- 关键词:
- 地震计;正弦标定;短时傅里叶变换;时频联合分析
seismometer; sine calibration; short—time Fourier transform; joint of time—frequency analysis;
- 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。
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, proposing 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.
