| 基于MATLAB的定点形变观测数据时频分析软件设计及应用研究 |
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| 引用本文： | 杨志鹏,陈秀清,张御阳,颜欢,陈碧洪,阮祥.基于MATLAB的定点形变观测数据时频分析软件设计及应用研究[J].震灾防御技术,2022,17(1):172-180. |
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| 作者姓名： | 杨志鹏 陈秀清 张御阳 颜欢 陈碧洪 阮祥 |
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| 作者单位： | 四川省地震局, 成都 610041 |
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| 基金项目： | 2021年度中国地震局地震监测、预报、科研三结合课题（3JH-2021041）；四川省科技计划项目（2020YJ0184） |
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| 摘 要： | 为方便台站工作人员快速准确分析定点形变观测数据的时频响应特征，利用MATLAB软件研发了基于小波分析和同步挤压时频变换的交互式数据处理与成图软件包。该软件包遵循模块化设计原则，利用导入模块读取从中国地震前兆台网数据处理系统下载的原始数据，利用预处理模块对缺失数据进行插值补全，利用小波分解与重构模块从原始数据中提取待分析的目标信号分量，利用同步挤压时频分析模块对提取目标进行高精度时频分析，并在各模块关键节点中增加绘图功能，全部处理过程采用绘图-参数输入-绘图交互的方式进行，参数灵活可调，且每步计算结果直观清晰。应用该软件包对2020年1月至2021年6月西昌小庙台DSQ型水管仪和SS-Y型伸缩仪整时值采样数据进行固体潮时频计算，并与理论固体潮时频结果进行对比，结合时频辅助分析方法，从时频谱角度初步评价了2套仪器观测资料的质量情况，为台站日常数据跟踪分析提供了参考。
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| 关 键 词： | 定点形变 时频分析 小波分析 同步挤压变换 处理软件 |
| 收稿时间： | 2021-07-19 |
Design and Application of A Deformation Time-frequency Analysis Software Package Based on MATLAB |
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| Yang Zhipeng,Chen Xiuqing,Zhang Yuyang,Yan Huan,Chen Bihong,Ruan Xiang.Design and Application of A Deformation Time-frequency Analysis Software Package Based on MATLAB[J].Technology for Earthquake Disaster Prevention,2022,17(1):172-180. |
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| Authors: | Yang Zhipeng Chen Xiuqing Zhang Yuyang Yan Huan Chen Bihong Ruan Xiang |
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| Institution: | Sichuan Earthquake Administration, Chengdu 610041, China |
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| Abstract: | In order to facilitate the station staff to effectively and accurately analyze the time-frequency characteristics of the fixed point deformation data, we provide an interactive data processing and mapping software package of wavelet decomposition and synchrosqueezing time-frequency transform based on MATLAB. The package follows the principle of modularization and includes such modules as the import module reading the original data from the txt file downloaded by QZProcess, the preprocess module interpolating the missing original data, the wavelet decomposition and reconstruction module extracting the target signal component from the original data and the synchrosqueezing transform module carrying out high precision time-frequency results of the extracted target signal. Since the mapping functions are integrated into modules and the whole flow is operated interactively, the calculation parameters are adjustable and the result of each step is intuitive. We use the proposed software package to process the hourly sampling data for DSQ and SS-Y of Xiaomiao station from Jan,2020 to June,2021. The processing results of earth tide signal qualitatively evaluate the quality of observation, and also providing useful reference for precursory data tracking and analysis. |
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| Keywords: | The fixed point deformation Time-Frequency analysis Wavelet decomposition Synchrosqueezing transform Processing software package |
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