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Optimization of magnetic anomaly detection with single-axis sensor for pig locating in low latitude areas

Petroleum 2019年第4期5卷 417-423页

作者： Wei Xu Zhiyong Guo Zhongxiang Liu Peng Zhang Yanxi Zhou School of Mechatronic Engineering Southwest Petroleum UniversityChengdu610500China

When a pig mounted with permanent magnets gets stuck in the pipeline,it can be located by detecting the magnetic anomalies on the ground using a single-axis magnetic *** order to collect the magnetic anomaly efficiently through single-axis magnetic sensor,a geometric detection model and calculation method for singleaxis magnetic anomaly detection is established in this *** distribution of magnetic inclination and declination of the measuring points is *** results indicate that the magnetic inclination of all measuring points vary within a small range of 2°,and this value is highly dependent on the magnetic sensor which is configured aboveground around the geomagnetic ***,the magnetic declination at different points of detection surface is subject to the geomagnetic components and the Y-axis component of the magnetic field of *** magnetic declinations distribute irregularly and vary in a wide ***,to achieve a high-efficiency detection with the single-axis sensor,the sensor shall be placed in such a manner that the magnetic inclination thereof coincides with the geomagnetic *** magnetic declination of the sensor can be calculated using s,the superposed Y-axis component induced by the permanent magnets,and the corresponding formula given in this *** article demonstrates the feasibility of locating a blocked pig in the pipeline based on the single-axis magnetic anomaly *** will have a practical significance in guiding the engineering detection.

关键词： pig blockage pig locating Single-axis magnetic anomaly Magnetic anomaly detection Optimized installation of sensor

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