VP宽频带倾斜仪现场自动校准装置设计  

Design of an On-site Automatic Calibration Device for the Vertical Pendulum Broadband Tiltmeter

作　　者：马武刚[1,2] 张肖[3] 

机构地区：[1]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 [2]中国地震局地壳应力研究所武汉创新基地,湖北武汉430071 [3]河北省地震局易县地震台,河北保定074211

出　　处：《地震工程学报》2016年第4期658-662,共5页China Earthquake Engineering Journal

基　　金：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)

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。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 apiezoelectric 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 ＋8V,and meets the requirement of a relative error of less than 1%.

关 键 词：VP宽频带倾斜仪 自动校准 格值 微位移 

分 类 号：TH762[机械工程—仪器科学与技术]