基于MEMS传感器的三分量检波器定向方法

Orientation Method of 3C Seismometer Based on MEMS Sensors

针对三分量地震勘探的功能需求,以三轴电子罗盘、三轴加速度计和三轴陀螺仪构成的惯性传感器组为基础,提出了一种三分量检波器的定向方法。主要与检波器3个分量对应组合,由电子罗盘和加速度计实现方位和倾角测量,并采用陀螺仪对两者进行误差补偿,采用快速的互补滤波方式进一步提高测量精度。检测方法已经成功应用于VSP系统中,野外应用效果显示,在复杂的施工环境下,测量误差可以控制在2°以内。

For the functional requirements of 3C seismic exploration, an orienting method of 3C seismometer was designed, which was based on sensor groups which was made up of 3-axis compass ,3-axis accelerometer and 3-axis gyroscope. The principle of the orientation method was inertia sensors connected with the seismic sensors by the same axis,the compass and the accelerome- ter were used to get tilt and pointing angles, and the gyroscope was used to compensate the error of compass and accelerometer. To fuse the data of three sensors and improve the accuracy further more, complementary filter was selected. The method was used in VSP system successfully. Analyses of field tests show that the testing accuracy is less than 2 degrees under the conditions of com- plex construction ambient.