Interference analysis of the extensometer observation at Xuzhou seismic station
-
摘要: 徐州地震台伸缩仪运行至今主要受降雨及气压干扰，分析研究了降雨及气压对伸缩仪的影响，并进行了定量分析。结果表明，EW分量降雨的响应较为灵敏；观测数据短时间大幅加速上行的主要原因是仪器传感器铁芯在差动变压传感器中未居中，偏置的传感器铁芯在差动变压传感器中的感应面积增加，使得感应电压在观测中大幅增加。Abstract: The extensometer of Xuzhou seismic station is mainly disturbed by rainfall and atmospheric pressure. The influence of rainfall and atmospheric pressure on extensometer is quantitatively analyzed. The results show that the response of EW component rainfall is more sensitive. The main reason for the rapid acceleration of observation data in a short time is that the sensor core is not centered in the differential voltage transformer sensor. The induced area of the biased sensor core in the differential voltage transformer sensor increases greatly, leading to an increase of the induced voltage in the observation.
-
Key words:
- extensometer /
- typical interference /
- anomalous change /
- rainfall change
-
图 1 徐州地震台山洞测项分布图
Figure 1. Distribution map of cave survey items at Xuzhou seismic station
图 2 徐州台2020年5月1—15日伸缩仪观测日变曲线
Figure 2. Observational daily curve of extensometer at Xuzhou seismic station on May 1—15, 2020
图 3 徐州台伸缩仪受降雨影响的观测曲线图
Figure 3. Observation curve of extensometer affected by rainfall at Xuzhou seismic station
图 4 徐州台伸缩仪受气压变化影响的观测曲线图
Figure 4. Observation curve of extensometer affected by the pressure change at Xuzhou seismic station
图 5 徐州台伸缩仪受雨水淤积影响的观测曲线图
Figure 5. Observation curve of extensometer affected by rainwater backflow at Xuzhou seismic station
图 6 徐州台伸缩仪2021年11月20日—2022年1月18日变化曲线
Figure 6. Daily curve of extensometer at Xuzhou seismic station from November 20, 2021 to January 18, 2022
图 7 徐州台伸缩仪故障维修图
Figure 7. Fault maintenance diagram of extensometer at Xuzhou seismic station
表 1 徐州台伸缩仪潮汐因子及精度表
Table 1. Factor and precision table of telescopic instrument of Xuzhou seismic station
时间
（年-月）潮汐因子 精度 NS EW NS EW 2020-01 0.8304 0.3899 0.0018 0.0181 2020-02 0.8420 0.3268 0.0018 0.0129 2020-03 0.8417 0.3563 0.0392 0.2171 2020-04 0.8318 0.3722 0.0024 0.0135 2020-05 0.8309 0.3825 0.0034 0.0212 2020-06 0.8220 0.5484 0.0064 0.1678 2020-07 0.8404 0.2877 0.0392 0.2171 2020-08 0.8874 0.4100 0.0054 0.0188 2020-09 0.8277 0.3663 0.0326 0.1453 2020-10 0.8367 0.3347 0.0034 0.0163 2020-11 0.8353 0.3555 0.0040 0.0127 2020-12 0.8326 0.3535 0.0052 0.0124 
下载: 导出CSV
表 2 伸缩仪降雨响应表
Table 2. Rainfall response table of telescopic instrument
日期
（年-月-日）降雨量（W）
/mm降雨持续时间
（△t）/h应变量增量/10−10 变化时间/h 降雨效率 NS（△a1） EW（△a2） NS（t1） EW（t2） NS（$\eta_{1} $） EW（$\eta_{2} $） 2020-01-07 33.10 24.73 439 1430 20.83 8.67 0.54 1.75 2020-02-14 23.60 12.58 − 288 − 41.56 − 0.97 2020-06-27 33 15 566 3243 32.13 39.01 1.14 6.55 2020-08-08 28.20 4.90 − 1367 − 32.00 − 9.89 2021-05-15 26.30 23.40 1016 2933 43.06 54.2 1.84 5.31 2021-06-16 61.20 29.40 1202 1962 30.40 24.48 0.67 1.09 2021-07-03 26.40 6.50 913 3626 31.87 34.93 5.32 21.13 2021-07-28 136.40 36.20 8720 4467 6.15 22.24 1.77 0.91 2021-08-02 102.50 5.58 1036 851 7.40 2.70 1.81 1.49 2021-09-04 60.90 26 1261 1342 10.00 8.20 0.80 0.85 2021-09-19 57 14 599 3836 19.00 46.20 0.75 4.81
下载: 导出CSV
-
[1] 李明,孙伶俐,罗俊秋,等. SS-Y 伸缩仪常见异常现象分析[J]. 地震地磁观测与研究,2012,33(3/4):280-284Li M,Sun L L,Luo J Q,et al. Judgment and maintenance of troubles SS-Y extensometer[J]. Seismological and Geomagnetic Observation and Research,2012,33(3/4):280-284 [2] 张文来,罗宏江,苏萍,等. 气压变化对 SS-Y 伸缩仪观测日变曲线的干扰分析[J]. 内陆地震,2006,20(3):266-270 doi: 10.3969/j.issn.1001-8956.2006.03.011Zhang W L,Luo H J,Su P,et al. The interferential analysis on air pressure change toward observational daily change curve of SS-Y tensometer[J]. Inland Earthquake,2006,20(3):266-270 doi: 10.3969/j.issn.1001-8956.2006.03.011 [3] 樊冬,尹传兵,李惊生,等. SS-Y 型伸缩仪气压扰动影响的特征分析与数学改正[J]. 大地测量与地球动力学,2017,37(12):1313-1316Fan D,Yin C B,Li J S,et al. Analysis disturbance characteristics from air pressure change and mathematical correction of SS-Y tensometer[J]. Journal of Geodesy and Geodynamics,2017,37(12):1313-1316 [4] 赵希磊,柳建. 一款简易 SS-Y 伸缩仪检测盒研发及应用[J]. 地震科学进展,2021,51(8):376-378Zhao X L,Liu J. Development and application of a simple detection box on SS-Y extensometer[J]. Progress in Earthquake Sciences,2021,51(8):376-378 [5] 张娜,龚燕民. SS-Y型伸缩仪环境干扰的异常研究[J]. 地震科学进展,2022,52(2):84-88Zhang N,Gong Y M. Research on environmental disturbance of SS-Y extensometer[J]. Progress in Earthquake Sciences,2022,52(2):84-88 -
点击查看大图
计量
- 文章访问数: 71
- HTML全文浏览量: 37
- PDF下载量: 15
