MEMS加速度传感器在矿用随钻轨迹测量系统中的误差校正

矿用随钻轨迹测量系统的工具面向角和倾角通常采用加速度传感器实现测量，然而由于传感器制作工艺、探管机械加工以及装配等因素使得工具面向角和倾角的测量出现误差。为了修正上述系统误差，首先介绍了随钻轨迹测量系统及其工作原理，进而分析了加速度传感器的误差产生，并建立了MEMS加速度传感器的误差模型；提出了一种基于三十六位置的加速度标定方法，并对其进行相应的测试。实验结果表明:建立的加速度误差模型在随钻轨迹测量系统中，倾角精度为0.2°，工具面向角精度为0.2°，且倾角和工具面向角之间相互影响较小，能够满足实际煤矿井下钻探工艺的精度需求。 

Error correction of MEMS acceleration sensor used for trajectory measurement while drilling system

Acceleration sensor is usually applied to measure the face angle and the inclination angle of the drilling trajectory measurement system, factors such as the manufacturing process, the mechanical processing of probe and the assembly produce measurement error of tool face angle and inclination. In order to correct the above error, the paper first introduced the trajectory measurement while drilling system and its working principle, and then analyzed the error of the acceleration sensor, the error model of MEMS acceleration sensor and 36-position calibration method were built, and the corresponding test was completed. The experimental results indicate that the accuracy for inclination angle is 0.2°, the accuracy for face angle is 0.2°, and the two parameters influence rarely each other. As a result, the acceleration error model can meet the accuracy requirements in actual underground drilling.