摘要
针对水平定向钻进电力铺管的特点,克服放电现象和磁场信号屏蔽因素,设计了基于三轴光纤陀螺和加速度计的捷联式惯导系统,依靠电缆铺设时MPP或PE管为通道,对电缆进行伴随式姿态采集,推导姿态积分算法,求解电缆轨迹的载体坐标b坐标;采用城市坐标系c对电缆b坐标轨迹进行坐标系矫正,获取地下电缆坐标系c下的空间绝对走向和坐标。某高压地下输电线路的现场试验表明,该系统能够在现场顺利完成防屏蔽伴随式姿态采集,生成绝对精度在0.25%的坐标轨迹,可以实现地下电力管线轨迹的高精度探测。
For the magnetic anomaly caused by secondary ore and metal, design the angular velocity measurement system by three axis optical fiber gyro, to overcome the magnetic factors, get the component of earth angular velocity at target point, reduce the appropriate north-seeking algorithm without the latitude and longitude, calculate the direction and angle of geographic north- ern; adopt the SINS by three axis optical fiber gyro and accelerometer, measure the attitude in horizontal-hole of working surface, reduce the Integral algorithm of attitude, calculate the coordinate borehole trajectory; the data of north-seeking correct the coordi- nate borehole trajectory, to get the space absolute direction and coordinate in horizontal-hole down-hole; discuss the feasibility and limitations of the dual system integration.
出处
《科学技术创新》
2018年第22期18-20,共3页
Scientific and Technological Innovation
关键词
井下
光纤陀螺
寻北
钻孔轨迹
捷联惯导
坐标
Down-hole
FOG
North-seeking
Borehole trajectory
SINS
Coordinate
