| 水管倾斜仪观测频带拓展方法研究 |
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| 引用本文： | 杨江,王平,陈志高,黄俊.水管倾斜仪观测频带拓展方法研究[J].西北地震学报,2019,41(5):1228-1233. |
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| 作者姓名： | 杨江 王平 陈志高 黄俊 |
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| 作者单位： | 中国地震局地震研究所(地震预警湖北省重点实验室), 湖北 武汉 430071;武汉地震科学仪器研究院有限公司, 湖北 武汉 430071,中国地震局兰州地震研究所, 甘肃 兰州 730000;中国地震局 (甘肃省)黄土地震工程重点实验室, 甘肃 兰州 730000,中国地震局地震研究所(地震预警湖北省重点实验室), 湖北 武汉 430071;武汉地震科学仪器研究院有限公司, 湖北 武汉 430071,中国地震局地震研究所(地震预警湖北省重点实验室), 湖北 武汉 430071;武汉地震科学仪器研究院有限公司, 湖北 武汉 430071 |
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| 基金项目： | 中国地震局地震研究所基本科研业务费专项资助项目和中国地震局地壳应力研究所基本科研业务费专项资助项目（IS201616247）；甘肃省重点研发计划（18YF1FA101） |
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| 摘 要： | 现有水管倾斜仪可清晰记录长周期固体潮信息，但由于其固有周期高，对短周期倾斜形变无法响应，易导致震前短临异常信息缺失。通过机械结构优化以降低仪器固有周期，拓展仪器的观测频带；采用更高精度的传感器和放大电路提高仪器信噪比，保证固体潮观测正常；最后通过连续对比观测，分析仪器频带拓宽后的观测数据差异。
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| 关 键 词： | 水管倾斜仪 固有周期 短临异常 信噪比 频带拓展 |
| 收稿时间： | 2018/12/1 0:00:00 |
A Method for Expanding the Observation Frequency Band of Water Tube Tiltmeters |
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| YANG Jiang,WANG Ping,CHEN Zhigao and HUANG jun.A Method for Expanding the Observation Frequency Band of Water Tube Tiltmeters[J].Northwestern Seismological Journal,2019,41(5):1228-1233. |
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| Authors: | YANG Jiang WANG Ping CHEN Zhigao and HUANG jun |
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| Institution: | Hubei Key Laboratory of Earthquake Early Warning, Institute of Seismology, CEA, Wuhan 430071, Hubei, China;Wuhan Institute of Seismologic Instrument Co. Ltd., Wuhan 430071, Hubei, China,Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China;Key Laboratory of Loess Earthquake Engineering, CEA & Gansu Province, Lanzhou 730000, Gansu, China,Hubei Key Laboratory of Earthquake Early Warning, Institute of Seismology, CEA, Wuhan 430071, Hubei, China;Wuhan Institute of Seismologic Instrument Co. Ltd., Wuhan 430071, Hubei, China and Hubei Key Laboratory of Earthquake Early Warning, Institute of Seismology, CEA, Wuhan 430071, Hubei, China;Wuhan Institute of Seismologic Instrument Co. Ltd., Wuhan 430071, Hubei, China |
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| Abstract: | Water tube tiltmeters can clearly record information from long-period solid earth tides. However, because its natural period is long, it cannot respond to short-period tilt deformation, leading to the missing of short-term anomalous information. In this paper, the natural period of the instrument was reduced and the observation frequency band was expanded through mechanical structure optimization. Through use of sensors with higher precision and amplifier circuit, the signal-to-noise ratio of the instrument was improved, and normal observation of solid earth tide was ensured. By chitinous contrast observation, the difference in observation data after expansion of the frequency band was analyzed. |
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| Keywords: | water tube tiltmeter natural period short-term anomalies signal to noise ratio (SNR) expansion of frequency band |
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