| 基于Matlab的地震计自噪声计算可视化软件设计 |
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| 引用本文： | 吴双,胡旭辉.基于Matlab的地震计自噪声计算可视化软件设计[J].地震地磁观测与研究,2020,41(3):232-238. |
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| 作者姓名： | 吴双 胡旭辉 |
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| 作者单位： | 中国济南 250014 山东省地震局 |
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| 摘 要： | 基于Matlab的GUI开发环境,采用三仪器法设计地震计自噪声可视化软件,通过对3台地震计同背景同时段原始波形数据进行去均值、去趋势值等一序列数据处理,并运用Welch平均周期法计算噪声功率谱密度,最终绘制完成自噪声功率谱密度曲线。选取山东省临沂市马陵山比测基地作为软件测试地点,以2组各3套地震计(STS2.5、BBVS-120地震计)观测系统作为测试样本,进行地震计自噪声分析,结果发现,STS2.5和BBVS-120型地震计UD向自噪声功率谱曲线在0.04—2 Hz频带内均低于NLNM,表明地震计噪声性能良好,从而验证了软件的可行性与准确性。
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| 关 键 词： | 三仪器法 GUI 自噪声计算 STS2.5 BBVS-120 |
Visualization software design of seismometer self-noise calculation based on Matlab |
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| WU Shuang,HU Xuhui.Visualization software design of seismometer self-noise calculation based on Matlab[J].Seismological and Geomagnetic Observation and Research,2020,41(3):232-238. |
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| Authors: | WU Shuang HU Xuhui |
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| Institution: | Shandong Earthquake Agency, Jinan 250014, China |
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| Abstract: | Based on the GUI development environment of Matlab, a three-instrument method is used to design the self-noise visualization software of the seismometer. This software performs a series of data processing procedures, including de-averaging and de-trending, to original waveform data for three seismometers with the same background and in the same time range, and uses the Welch average period method to calculate the noise power spectral density, and finally visuals the self-noise power spectral density curves. Select the Maling Mountain Comparison Test Base in Linyi City, Shandong Province as the software test site, and use 2 groups of 3 sets of seismometers (STS2.5, BBVS-120 seismometers) observation systems as test samples to calculate their self-noise spectral density. The results show that the self-noise spectral density of the UD component of the STS2.5 and BBVS-120 seismometers is lower than the NLNM curve in the frequency band of 0.04-2 Hz, thus verifying the reliability and accuracy of the software. |
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| Keywords: | three-instrument method GUI self-noise calculation STS2 5 BBVS-120 |
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