随钻测量用微小型惯性测量单元设计  

Design of miniaturized inertial measurement unit used for measurement-while-drilling

作　　者：程世超[1] 高爽[1] 林铁[1] 徐美宝[1] 郝澄[1] 

机构地区：[1]北京航空航天大学惯性技术重点实验室,北京100191

出　　处：《传感器与微系统》2015年第4期95-98,共4页Transducer and Microsystem Technologies

摘　　要：为满足随钻测量仪器在小口径油井、高频振动、强冲击等环境中的应用需求,使用光纤陀螺与石英挠性加速度计作为传感器组件,设计加速度计信号采样电路,小型化导航计算模块采用SOPC+SDRAM+FLASH,完成传感器信号采集、误差补偿、导航解算以及与上位机通信等功能。惯性测量单元(IMU)集成了电源模块、传感器组件和导航计算机,最终制作成38 mm的随钻测量仪器。实验结果表明:当井斜角不小于5°时,样机能够达到系统姿态解算精度要求(井斜角误差小于±0.2°,方位角误差小于±2°,工具面角误差小于±0.2°)。In order to meet application needs of measurement-while-drilling（MWD） device in some environment like small-bore oil well, high-frequency vibration and intense impact, using fiber-optic gyroscope （FOG） and quartz flexibility accelerometer as sensor unit, design accelerometer signal sampling circuit, and miniaturization navigation calculating module includes system on programmable chip （ SOPC ） , SDRAM and FLASH, complete functions such as signal collecting of sensors, error compensation, navigation calculating and communicating with upper PC. Inertial measurement unit （ IMU ） consists of power module, sensor unit and navigation computer, then fabricate MWD device which is Ф38 mm. The result shows that when the angle of inclination is bigger than 5° ,the model machine can meet the needs of precision of attitude resolving （ error of inclination and tool face angle error are less than ±0.2°,and error of azimuth is less than ±2°）.

关 键 词：随钻测量 惯性测量单元 SOPC导航计算机 小型化 

分 类 号：TE927[石油与天然气工程—石油机械设备]