Method of positioning detector magnetic label in buried steel pipeline
The invention relates to a method of positioning a detector magnetic label in a buried steel pipeline. Two groups of three-component magnetometer probes vertical to axial direction of the pipeline make up a detection array, and a distance between probes is 1; the first probe is in a lateral position...
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| creator | ZHUANG JINFENG DU HUILI HOU SHIJUN LI JUN XU ZHIJUN YIN XUNJIN LI YAOHONG XU HAILIN LIU XIANDONG TANG RONG QIAN DECAI MA XUELI ZHANG JIANJUN ZHENG SHULIN CHEN FENG WANG JUN YUAN LONGCHUN MENG XIANGLEI GONG ZE XUE ZHENGLIN CHENG WENFENG SU LIN LIU JUNFU |
| description | The invention relates to a method of positioning a detector magnetic label in a buried steel pipeline. Two groups of three-component magnetometer probes vertical to axial direction of the pipeline make up a detection array, and a distance between probes is 1; the first probe is in a lateral position of the pipeline, and is used for measuring background magnetic fields generated by the steel pipeline and the ground; the second probe is in the center of an instrument, a buried pipeline is below the second probe, the three-component probe measures strength of magnetic induction in x, y and z three orthogonal directions generated the magnetic label and transferred to the ground in the background magnetic field; a detector moves steadily on the ground along a pipeline route, and calculates difference of three components of the two groups of probes; and the position and bury depth of the positioned magnetic label buried nearby the pipeline can be measured by using a magnetic positioning method. The method can be ap |
| format | Patent |
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Two groups of three-component magnetometer probes vertical to axial direction of the pipeline make up a detection array, and a distance between probes is 1; the first probe is in a lateral position of the pipeline, and is used for measuring background magnetic fields generated by the steel pipeline and the ground; the second probe is in the center of an instrument, a buried pipeline is below the second probe, the three-component probe measures strength of magnetic induction in x, y and z three orthogonal directions generated the magnetic label and transferred to the ground in the background magnetic field; a detector moves steadily on the ground along a pipeline route, and calculates difference of three components of the two groups of probes; and the position and bury depth of the positioned magnetic label buried nearby the pipeline can be measured by using a magnetic positioning method. 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Two groups of three-component magnetometer probes vertical to axial direction of the pipeline make up a detection array, and a distance between probes is 1; the first probe is in a lateral position of the pipeline, and is used for measuring background magnetic fields generated by the steel pipeline and the ground; the second probe is in the center of an instrument, a buried pipeline is below the second probe, the three-component probe measures strength of magnetic induction in x, y and z three orthogonal directions generated the magnetic label and transferred to the ground in the background magnetic field; a detector moves steadily on the ground along a pipeline route, and calculates difference of three components of the two groups of probes; and the position and bury depth of the positioned magnetic label buried nearby the pipeline can be measured by using a magnetic positioning method. 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Two groups of three-component magnetometer probes vertical to axial direction of the pipeline make up a detection array, and a distance between probes is 1; the first probe is in a lateral position of the pipeline, and is used for measuring background magnetic fields generated by the steel pipeline and the ground; the second probe is in the center of an instrument, a buried pipeline is below the second probe, the three-component probe measures strength of magnetic induction in x, y and z three orthogonal directions generated the magnetic label and transferred to the ground in the background magnetic field; a detector moves steadily on the ground along a pipeline route, and calculates difference of three components of the two groups of probes; and the position and bury depth of the positioned magnetic label buried nearby the pipeline can be measured by using a magnetic positioning method. The method can be ap</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | GYROSCOPIC INSTRUMENTS MEASURING MEASURING ANGLES MEASURING AREAS MEASURING DISTANCES, LEVELS OR BEARINGS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS SURVEYING TESTING |
| title | Method of positioning detector magnetic label in buried steel pipeline |
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