In the semi-airborne frequency domain electromagnetic detection, strong noise will be generated due to the attitude change of the receiving coil sensor. However, the existing attitude measurement system cannot be directly used in the semi-airborne frequency domain electromagnetic system because of the requirement on the volume and accuracy of the instrument. In order to reduce the effect of attitude noise, this paper analyzes the cause and influence of attitude noise in the semi-airborne frequency domain electromagnetic system, and presents the attitude noise correction method based on coefficient rotation matrix and Kalman algorithm. A high-performance attitude sensor based on (Micro-Electro-Mechanical System (MEMS) technology is used to design an attitude measurement system for the semi-airborne frequency domain electromagnetic system. The calculated result shows that the required accuracy of the roll angle and pitch angle of the attitude measurement system is less than 0.1°, whereas the required accuracy of the yaw angle is lower. In the field application, the apparent resistivity results show that the imaging profile corrected by attitude error is more consistent with local geological data than that without correction. Consequently, the attitude measurement system and correction method proposed in this paper can improve the detection accuracy of the semi-airborne frequency domain electromagnetic system significantly. © 2024 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

中文翻译：

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半机载频域电磁探测运动姿态测量系统及校正方法设计

在半机载频域电磁探测中，由于接收线圈传感器的姿态变化会产生较强的噪声。然而，现有的姿态测量系统由于对仪器体积和精度的要求，无法直接用于半机载频域电磁系统。为了减少姿态噪声的影响，分析了半机载频域电磁系统姿态噪声的成因和影响，提出了基于系数旋转矩阵和卡尔曼算法的姿态噪声校正方法。采用基于微机电系统（MEMS）技术的高性能姿态传感器，设计了半机载频域电磁系统姿态测量系统。计算结果表明，满足滚转角和滚转角精度要求。姿态测量系统的俯仰角小于0.1°，而对偏航角的精度要求较低，现场应用视电阻率结果表明，姿态误差校正后的成像剖面与当地地质资料更加吻合。因此，本文提出的姿态测量系统和校正方法可以显着提高半机载频域电磁系统的检测精度。© 2024 日本电气工程师学会和 Wiley periodicals LLC。