Magnetic label and method for monitoring and positioning

A magnetic label and magnetic moment technology, applied in the field of measurement, can solve problems such as deformation, and achieve the effects of high test accuracy, stable performance, and avoidance of ill-posedness

Inactive Publication Date: 2012-08-01
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a magnetic label for monitoring and positioning, which solves the problem of deform

Method used

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  • Magnetic label and method for monitoring and positioning
  • Magnetic label and method for monitoring and positioning

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Embodiment Construction

[0013] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0014] Select the part that needs to be monitored and positioned, such as the surface or deep part of the slope 9, embed the magnetic tag 8, select a reference position in the non-deformable area of ​​the structure to arrange the magnetic gradient meter 7, and measure the magnetic field of the magnetic tag 8.

[0015] The magnetic label 8 excites the magnetic field. Since the distance between the magnetic label 8 and the magnetic gradient meter 7 is much larger than the size of the excitation coil 3, the magnetic label 8 is regarded as a magnetic dipole, and its magnetic moment is:

[0016] |m|=πNIR 2 (1)

[0017] In the formula, m(m x , m y , m z ) is the magnetic moment of the magnetic label 8, |m| is the modulus of the magnetic moment, I is the current in the exciting coil 3, R is the radius of the exciti...

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Abstract

The invention discloses a magnetic label and method for monitoring and positioning, and belongs to the technical field of measurement. The invention is characterized in that the magnetic label comprises a magnetic coil, a director, an RF (Radio Frequency) communication controller, an antenna, a power supply and an epoxy compound sealing material, wherein the magnetic coil, the RF communication controller, the antenna and the power supply are located in the middle of the director, and the whole body is sealed with the epoxy compound sealing material; the magnetic torque of the magnetic coil keeps constant through the director, and the unknown number of the magnetic label is only a position parameter; and the magnetic field excited by the magnetic label is measured by a magnetic gradiometer, the position of the magnetic label is obtained through a magnetic field gradient tensor sum optimization algorithm, and the monitoring and positioning of the magnetic label are realized. The invention has the effects and benefits as follows: the monitoring and positioning in environments such as an underwater part, sludge, a soil layer deep part and the like are realized; and the magnetic label has the advantages of simplicity in operation, high test accuracy and stable performance, can be used for deformation monitoring of rock soil structures of side slopes, embankments and the like, and also can be widely applied to washing monitoring of huge engineering structures of reservoir dams, river levees and the like.

Description

technical field [0001] The invention belongs to the technical field of measurement and relates to a magnetic label for civil engineering safety monitoring. Background technique [0002] Under the conditions of natural geological action, rainfall, human factors, etc., when an unstable landslide occurs on an open-air slope or a mountain slope, it will cause great harm to agriculture, water conservancy, transportation, construction, etc., and monitoring and early warning of it is of great significance. Traditional slope monitoring methods mainly include conventional displacement meters, geodetic surveys, TDR cables, optical fiber sensors, synthetic aperture radar interferometry techniques, GPS measurements, photogrammetry methods, etc., but most of them have the following problems: (1) Existing For slope deformation monitoring, sensors are mostly arranged on the slope surface, and there are human errors when analyzing the displacement inside the soil through the deformation mon...

Claims

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Application Information

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IPC IPC(8): G06K19/07G01B7/00
Inventor 江胜华周智欧进萍
Owner DALIAN UNIV OF TECH
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