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Locator For Locating A Current Carrying Conductor

A technology of current-carrying conductors and locators, applied in the field of locators, can solve problems such as unfitness, high-frequency signal dissipation, etc.

Inactive Publication Date: 2013-05-08
雷迪有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dedicated single frequency locators exist which are optimized for finding telecommunication cables, but for general cable and pipe locating these are less suitable as high frequency signals are quickly dissipated with distance along a typical cable or pipe

Method used

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  • Locator For Locating A Current Carrying Conductor
  • Locator For Locating A Current Carrying Conductor
  • Locator For Locating A Current Carrying Conductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] figure 1 A signal generator 100 is shown, which generates an AC signal for coupling to a concealed conductor. The signal generated by the signal generator 100 has two frequencies. A first frequency of 33kHz and a second frequency of 66kHz. The signal generator has a first oscillator 102 which generates an AC signal with a frequency of 33 kHz. The first oscillator is connected to a first filter 104 configured to pass signals having a frequency of 33 kHz and to attenuate any harmonics produced by the first oscillator. The first terminal 106 is connected to the first filter 104 . The signal generator 100 has a second oscillator 108 that generates a signal with a second frequency. In this example, the second frequency is 66kHz. The second oscillator is connected to the second filter 110 . The second filter 110 allows signals having a frequency of about 66 kHz to pass, and attenuates harmonics. The second filter 110 is connected to the second terminal 112 of the signa...

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PUM

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Abstract

A locator for locating a concealed conductor carrying an alternating current having at least first and second frequencies, the alternating current produced by at least one dedicated signal generator. The locator includes at least one magnetic field sensor operable to convert electromagnetic radiation from the conductor into a field strength signal; a digital analogue converter configured to generate a digitized signal dependent upon the field strength signals from the magnetic field sensor; a digital signal processor configured to isolate components of the digitized signal resulting from the first frequency and the second frequency; and process the isolated components to generate one or more signals indicative of the proximity of the conductor to the detector; and an output configured to generate an audio and / or visual indication of the proximity of the conductor, wherein the isolated signal components resulting from the first frequency signal and the second frequency signal are contemporaneously processed.

Description

technical field [0001] The present application relates to positioners for positioning current-carrying conductors. Background technique [0002] Before commencing excavation or other operations where electrical cables, fiber optic cables or other utility conduits or conduits are buried, it is important to locate the buried cables or conduits to ensure that they are not damaged during the operation. And is also useful for paths where buried cables or conduits can be traced. Current-carrying conductors emit electromagnetic radiation that can be detected by an electromagnetic antenna. If a fiber optic cable or non-metallic utility pipe or conduit is fitted with a small electrical tracer wire, an alternating current can be induced in the tracer wire, which in turn can radiate electromagnetic radiation. The use of detectors to detect electromagnetic fields emitted by conductors carrying alternating current is known. [0003] A type of detector operates in one of three modes. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
CPCG01V3/08G01V3/088
Inventor 理查德·戴维·皮尔逊杰弗里·理查德·汤普森德雷克·詹姆斯·王
Owner 雷迪有限公司