Magnetic mark detector for detecting location of buried objects utilizing magnetic mark

A magnetic marker and detector technology, which can be used in measurement devices, re-radiation, and electric/magnetic exploration, etc., to solve the problems of missing magnetic coils and inability to easily detect buried objects.

Inactive Publication Date: 2005-02-02
EWOOTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the magnetic coil cannot be accurately installed on the upper part of the buried object during excavation and burial, the position of the buried object cannot be easily detected
In extreme cases, magnetic coils can be lost

Method used

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  • Magnetic mark detector for detecting location of buried objects utilizing magnetic mark
  • Magnetic mark detector for detecting location of buried objects utilizing magnetic mark
  • Magnetic mark detector for detecting location of buried objects utilizing magnetic mark

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Embodiment Construction

[0020] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description and drawings, the same reference signs are used to indicate the same or similar component parts, and therefore, repeated descriptions of the same or similar parts are omitted.

[0021] figure 1 The method for detecting the magnetic mark 11 attached to the buried object is shown.

[0022] The magnetic marker 11 is made of a permanent magnet having a predetermined magnetic force, and is coated with a waterproof and moisture-proof nickel or urethane coating. When constructing to lay objects 18 including water pipes, urban gas supply pipes, electrical and communication lines underground, magnetic markers 11 are attached to buried objects 18.

[0023] The magnetic marker detector 10 has a support rod 15, and two fluxgate sensors 12 for measuring magnetic fields are formed inside the support rod 15. Each fluxgate sensor 12 conta...

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Abstract

The present invention discloses a magnetic mark detector for detecting location of buried objects by detecting the magnetic field generated by the magnetic mark made by a permanent magnet adhered on the buried objects. The magnetic mark detector includes: two flux gate sensors arranged with same axis for detecting the magnetic field generated by the magnetic mark; a digital gradiometer which includes a digital circuit for generating a frequency corresponding to the frequency difference between two signals input from the two flux gate sensors, thereby outputting 8-bit parallel digital data by mixing the two waves output from the two flux gate sensors; a D / A converter for receiving the 8-bit digital data to generate analog signals corresponding to the 8-bit digital data; a voltage controlled oscillator converting the analog signals output from the D / A converter to audio signals with audible frequency level; and a voice amplifier for amplifying the output signals output from the voltage controlled oscillator in order to output the voice to the outside through a loudspeaker.

Description

Invention field [0001] The present invention relates to a magnetic mark detector which accurately detects the position of the buried object by detecting the magnetic field generated by the magnetic mark made of a permanent magnet and attached to the buried object. Background technique [0002] With the rapid development of cities, a large number of water supply systems, urban gas supply pipelines and communication lines have been installed in cities to provide infrastructure such as electricity, water, and communication supply equipment. For the beauty of the city and the purpose of protecting these facilities, these water supply systems, urban gas supply pipelines and communication lines are generally buried underground. However, not only the information related to the location of the buried object is not sufficient, but also the worker cannot intuitively detect the location and state of the buried object. Therefore, it is very difficult to maintain and repair the buried objects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
Inventor 金平明鲁勋
Owner EWOOTEC
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