﻿ 地震计保温效能分析
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 地震地磁观测与研究  2019, Vol. 40 Issue (2): 131-134  DOI: 10.3969/j.issn.1003-3246.2019.02.018 0

### 引用本文

An Quan, Zhai Hao, Zhao Tiesuo. Analysis of insulation efficiency of seismometer[J]. Seismological and Geomagnetic Observation and Research, 2019, 40(2): 131-134. DOI: 10.3969/j.issn.1003-3246.2019.02.018.

### 文章历史

Analysis of insulation efficiency of seismometer
An Quan , Zhai Hao , Zhao Tiesuo
Earthquake Agency of Inner Mongolia Autonomous Region, Hohhot 010010, China
Abstract: In this research, the thermal insulation covers were installed for the seismometers of Daqintala Seismic Station in Inner Mongolia Autonomous Region. And we used the PSD probability density function of seismic observation data before and after thermal insulation that was calculated by using the calculation software of base noise to analyze the effect of thermal insulation cover for seismometer. The result suggested that the seismometer temperature changed smoothly and the quality of seismic observation data was improved.
Key words: Daqintala Seismic Station    insulation cover    background noise    PSD
0 引言

1 观测环境变化 1.1 台站环境

 图 1 DQL台摆房 Fig.1 Room of sensor at DQL station

1.2 加装保温罩

 图 2 地震计加装保温罩 Fig.2 Insulation of seismometer
2 数据处理

2.1 台基噪声计算 2.1.1 RMS计算

 $v=\frac{N \times D}{S}=\frac{N \times U}{R \times K \times S}$ (1)

 ${\rm{RMS}} = \sqrt {\frac{{\sum\nolimits_{i = 1}^n {{{\left( {{v_i} - v} \right)}^2}} }}{n}}$ (2)

2.1.2 PSD计算

 ${\rm{PS}}{{\rm{D}}_a}(\omega ) = {\omega ^2}{\rm{PS}}{{\rm{D}}_v}(\omega )$ (3)

2.2 数据分析

 图 3 保温前后温度变化曲线对比 Fig.3 Temperature change before and after insulation
 图 4 保温前后PSD曲线对比 (a)2017年2月16日00 — 03时；(b)2017年2月17日00 — 03时 Fig.4 PSD curves before and after insulation

3 结束语

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