十二位置标定法在钻孔测斜仪校正中的应用  

Application of the twelve‑position calibration method for the borehole inclinometer

作　　者：李忠[1] 李扬 赵燕来[1] LI Zhong;LI Yang;ZHAO Yanlai(Institute of Exploration Technology,CAGS,Chengdu Sichuan 611734,China)

机构地区：[1]中国地质科学院探矿工艺研究所,四川成都611734

出　　处：《钻探工程》2021年第5期76-82,共7页Drilling Engineering

基　　金：中国地质调查局地质调查项目“怒江流域泸水-芒市段灾害地质调查”(编号:DD20190643)。

摘　　要：磁性钻孔测斜仪所使用的磁传感器和加速度传感器由于自身特性的差异以及生产装配的原因,给传感器输出带来了误差,造成测斜仪顶角和方位角计算出现偏差。为此采用了一种十二位置标定方法,依靠垂直方向的地磁场分量和重力加速度,对磁传感器和加速度传感器的三轴零位偏差、灵敏度误差和安装误差进行了校正。校正前后的对比实验显示:测斜仪顶角均方误差由0.5°减小为0.06°,方位角均方误差由校正前的21.75°减小到0.82°,表明该方法校正效果明显,可以满足测斜仪工程化应用的要求。The magnetic sensor and the acceleration sensor used in the magnetic borehole inclinometer bring errors to the output of the sensors due to their own difference in characteristics and their production and assembly,resulting in the deviation in the calculation of the drift angle and azimuth of the inclinometer.Therefore,the twelve‑position calibration method is adopted to correct the three axis zero position deviation,sensitivity error and installation error of the magnetic sensor and the acceleration sensor according to the geomagnetic component and gravitational acceleration in the vertical direction.The comparison experiment before and after correction shows that the mean square error of the drift angle of the inclinometer is reduced from 0.5°to 0.06°,the mean square error of the azimuth is reduced from 21.75°to 0.82°.It demonstrates that the correction method is effective and can meet the requirements of the engineering application of the inclinometer.

关 键 词：磁传感器 加速度传感器 误差校正 十二位置标定法 钻孔测斜仪 

分 类 号：P634.7[天文地球—地质矿产勘探]