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ÖÐͼ·ÖÀàºÅ£ºTE832¡¡ ÎÄÏ×±êʶÂë: A
Research on Rectification Method for Pipeline Centerline Trajectory Based on IMU Survey
PENG Hao1, LIU Chang1, Zhong Qi2, Zhu Yang-ke1, HE Mo1, ZHAO Shuai1
£¨1. Safety, Environment and Technology Supervision Research Institute of PetroChina Southwest Oil & Gasfield Company, Chengdu 610041, China
2. PetroChina Southwest Oil & Gas Field Materials Branch, Chengdu 610041, China£©
Abstract: There are several factors which decease the accuracy of pipeline centerline coordinates in pipeline inline IMU survey, such as over speed of inspection tool during the run, large interval distance of above ground markers abbreviated as AGM, AGM malfunctioning, inspection tool transmitter malfunctioning, or signal noise. Firstly, to analyze main effecting factors of centerline coordinate accuracy in response to the continuous accumulation of errors in inertial navigation algorithms and the uncertainty of data solution model errors, then find a method to rectify pipeline centerline coordinates by manual marker point editing and insertion. The method was applied into engineering practice, and the results show that the manual marker point inserting method can rectify pipeline centerline coordinates within the meter level.
Key words: IMU inspection; Pipeline centerline coordinates; Manual marker; Accuracy rectification
1 ÒýÑÔ
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