Title :
A Robust Inclinometer System With Accurate Calibration of Tilt and Azimuth Angles
Author :
Weibin Yang ; Bin Fang ; Yuan Yan Tang ; Jiye Qian ; Xudong Qin ; Wenhua Yao
Author_Institution :
State Key Lab. of Coal Mine Disaster Dynamics & Control, Chongqing Univ., Chongqing, China
Abstract :
This paper proposes a robust inclinometer system using three monaxial microelectromechanical systems accelerometers and three monaxial fluxgate sensors. By formulating a basic three sensitive axes sensor model, we calibrate tilt and azimuth directly through a simple and effective linear model. To improve the accuracy of the proposed model, we present two different optimal solutions to minimize the systematic error, and adopt the interior-reflective Newton method and the sequential quadratic programming method to solve the problems, respectively. Experimental results demonstrate that our system performs excellently with the maximum error of tilt angle 0.09° in our applied measurement range (0°-120 °), and the maximum error of azimuth angle 0.4 ° in the measurement range (0° -360°).
Keywords :
Newton method; accelerometers; angular measurement; calibration; measurement errors; microsensors; quadratic programming; azimuth angle measurement; calibration; interior-reflective Newton method; measurement error; monaxial fluxgate sensor; monaxial microelectromechanical systems accelerometer; robust inclinometer system; sensitive axe sensor model; sequential quadratic programming method; systematic error minimization; tilt angle measurement; Acceleration; Accelerometers; Azimuth; Calibration; Micromechanical devices; Sensors; Vectors; Azimuth; calibration; fluxgate sensor; monaxial microelectromechanical system (MEMS) accelerometer; tilt;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2013.2252891