| VP宽频带倾斜仪现场自动校准装置设计 |
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| 引用本文： | 马武刚,张肖.VP宽频带倾斜仪现场自动校准装置设计[J].西北地震学报,2016,38(4):658-662. |
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| 作者姓名： | 马武刚 张肖 |
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| 作者单位： | 中国地震局地震研究所(地震大地测量重点实验室), 湖北 武汉 430071;中国地震局地壳应力研究所武汉创新基地, 湖北 武汉 430071,河北省地震局易县地震台, 河北 保定 074211 |
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| 基金项目： | 中国地震局地震科技星火计划攻关项目（XH15030）；中国地震局公益性行业科研专项（201208002）；中国地震局地震科技星火计划攻关项目（XH14034）；中国地震局地震研究所所长基金（201506030） |
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| 摘 要： | 为了对VP宽频带倾斜仪进行现场校准,设计了一款基于单片机AT89C51的新型现场自动校准装置。经验证该装置在+8V激励电压情况下与高精度激光干涉仪结合使用,其校准相对误差为0.36%,满足小于1%的校准相对误差要求。
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| 关 键 词： | VP宽频带倾斜仪 自动校准 格值 微位移 |
| 收稿时间： | 2015/5/10 0:00:00 |
Design of an On-site Automatic Calibration Device for theVertical Pendulum Broadband Tiltmeter |
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| MA Wu-gang and ZHANG Xiao.Design of an On-site Automatic Calibration Device for theVertical Pendulum Broadband Tiltmeter[J].Northwestern Seismological Journal,2016,38(4):658-662. |
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| Authors: | MA Wu-gang and ZHANG Xiao |
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| Institution: | Key Laboratory of Earthquake Geodesy, Institute of Seismology, CEA, Wuhan 430071, Hubei, China;Wuhan Base of Institute of Crustal Dynamics, CEA, Wuhan 430071, Hubei, China and Yixian Seismic Station, Earthquake Administration of Hebei Province, Baoding 074211, Hebei, China |
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| Abstract: | The vertical pendulum (VP) broadband tiltmeter is a type of earthquake precursor observation equipment that records the inclined earth tide.The scale value represents the relationship between the measured physical quantity and the output voltage.Its accuracy plays a key role in data reliability.The calibration process provides the scale value for the instrument.Most traditional calibration methods,e.g.,plat calibrations in the laboratory and manual calibrations on site,cannot satisfy the accuracy levels required in scientific applications,or might affect the continuity of observations.In this study,we investigate an on-site automatic calibration device,in which small-scale shifts are introduced by a piezoelectric ceramic under the control of a single chip microcomputer AT89C51.The device then calculates the scale values from serial corresponding values of the outputs of the VP broadband tiltmeter and a laser interferometer.This device could realize the automatic operation of calibration,and its relative calibration accuracy is 0.36% when the excitation voltage is adjusted to+8 V,and meets the requirement of a relative error of less than 1%. |
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| Keywords: | VP broadband tiltmeter automatic calibration scale value micro-displacement |
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