GB2006438A - Apparatus for Locating Electric Conductors - Google Patents

Apparatus for Locating Electric Conductors

Info

Publication number
GB2006438A
GB2006438A GB7840541A GB7840541A GB2006438A GB 2006438 A GB2006438 A GB 2006438A GB 7840541 A GB7840541 A GB 7840541A GB 7840541 A GB7840541 A GB 7840541A GB 2006438 A GB2006438 A GB 2006438A
Authority
GB
United Kingdom
Prior art keywords
locator
underground cable
coils
indicator
amplifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7840541A
Other versions
GB2006438B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electricity Council
Original Assignee
Electricity Council
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electricity Council filed Critical Electricity Council
Priority to GB7840541A priority Critical patent/GB2006438B/en
Publication of GB2006438A publication Critical patent/GB2006438A/en
Application granted granted Critical
Publication of GB2006438B publication Critical patent/GB2006438B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
    • G01V3/06—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current using ac

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

An underground cable locator, which enables the simultaneous determination of cable position and direction, has a first inductive pick-up system including a coil 13 together with circuitry 26, 27, 29 i.e. squarer, phase comparator and drive amplifier, and an indicator 28, arranged to show when the coil 13 is aligned parallel with the underground cable. The locator also has a second inductive pick-up system including two coils 11 and 12 with associated circuitry 16, 17, 18 i.e. rectifiers and differential amplifier and an indicator 19, arranged to show the direction in which the locator must be moved in order to be over the underground cable. In an alternative embodiment the circuit of the second inductive system includes a single amplifier chain and the outputs of the two coils are applied to the amplifier chain by time multiplexing. <IMAGE>
GB7840541A 1977-08-02 1978-10-13 Portable apparatus for identifying on locating electric conductors Expired GB2006438B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7840541A GB2006438B (en) 1977-08-02 1978-10-13 Portable apparatus for identifying on locating electric conductors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3244477 1977-08-02
GB7840541A GB2006438B (en) 1977-08-02 1978-10-13 Portable apparatus for identifying on locating electric conductors

Publications (2)

Publication Number Publication Date
GB2006438A true GB2006438A (en) 1979-05-02
GB2006438B GB2006438B (en) 1982-03-24

Family

ID=26261376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7840541A Expired GB2006438B (en) 1977-08-02 1978-10-13 Portable apparatus for identifying on locating electric conductors

Country Status (1)

Country Link
GB (1) GB2006438B (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2481459A1 (en) * 1980-04-29 1981-10-30 Electrolocation Ltd DEVICE FOR DETECTING CONCEALED CURRENT CONDUCTORS, SUCH AS BURST CABLES OR CONDUITS, INTENDED FOR IMPROVEMENT OF RECOVERY INSTRUMENTS
EP0045486A2 (en) * 1980-07-31 1982-02-10 Metrotech Corporation Apparatus for determining the distance to a concealed conductive object
GB2135460A (en) * 1983-01-20 1984-08-30 Scopemoor Ltd Detecting hidden objects
US4520317A (en) * 1980-07-31 1985-05-28 Metrotech, Inc. Apparatus including a pair of automatic gain controlled amplifiers for determining the lateral direction to a concealed conductive object
GB2153077A (en) * 1983-10-18 1985-08-14 David Crone Metal detecting apparatus
GB2154325A (en) * 1984-01-11 1985-09-04 Dynalog Electronics Electromagnetic monitoring of elongate conductors, particularly pipes or cables
FR2596167A1 (en) * 1986-03-21 1987-09-25 Burstin Gilles Device for remote location of electrical circuits
US4719426A (en) * 1983-01-20 1988-01-12 Scopemoor Limited Method for magnetically detecting a localized disturbance of the ground
US5043666A (en) * 1990-04-16 1991-08-27 Metrotech Corporation Self-calibrating electromagnetic field sensor for locating buried conduits
GB2255832A (en) * 1991-05-14 1992-11-18 Mark Ian Howell Locating buried object having an associated electromagnetic field
EP0520102A1 (en) * 1991-06-26 1992-12-30 YOKOI MANUFACTURING CO., Ltd Device for location of embedded objects
US5438266A (en) * 1993-12-07 1995-08-01 B.C. Hydro And Power Authority Instrument to locate buried conductors by providing an indication of phase reversal of the signal utilizing the odd harmonic and the even harmonic when a vertical axis coil passes over one of the buried conductors
US6140819A (en) * 1998-05-26 2000-10-31 Heath Consultants, Inc. Continuous-depth-indicating underground pipe and cable locator
GB2453199A (en) * 2007-09-28 2009-04-01 Charles Machine Works Magnetic field locator with two tri-axial antennas
US9547101B2 (en) 2007-09-28 2017-01-17 The Charles Machine Works, Inc. System for tracking a downhole tool assembly using dual above-ground receiver assemblies
US11397266B2 (en) 2018-08-29 2022-07-26 Subsite, Llc GPS assisted walkover locating system and method
US12007491B2 (en) 2022-07-05 2024-06-11 The Charles Machine Works, Inc. GPS assisted walkover locating system and method

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2481459A1 (en) * 1980-04-29 1981-10-30 Electrolocation Ltd DEVICE FOR DETECTING CONCEALED CURRENT CONDUCTORS, SUCH AS BURST CABLES OR CONDUITS, INTENDED FOR IMPROVEMENT OF RECOVERY INSTRUMENTS
EP0045486A2 (en) * 1980-07-31 1982-02-10 Metrotech Corporation Apparatus for determining the distance to a concealed conductive object
EP0045486A3 (en) * 1980-07-31 1982-05-05 Metrotech Corporation Apparatus for determining the distance to a concealed conductive object
US4520317A (en) * 1980-07-31 1985-05-28 Metrotech, Inc. Apparatus including a pair of automatic gain controlled amplifiers for determining the lateral direction to a concealed conductive object
GB2135460A (en) * 1983-01-20 1984-08-30 Scopemoor Ltd Detecting hidden objects
US4719426A (en) * 1983-01-20 1988-01-12 Scopemoor Limited Method for magnetically detecting a localized disturbance of the ground
GB2153077A (en) * 1983-10-18 1985-08-14 David Crone Metal detecting apparatus
GB2154325A (en) * 1984-01-11 1985-09-04 Dynalog Electronics Electromagnetic monitoring of elongate conductors, particularly pipes or cables
FR2596167A1 (en) * 1986-03-21 1987-09-25 Burstin Gilles Device for remote location of electrical circuits
US5043666A (en) * 1990-04-16 1991-08-27 Metrotech Corporation Self-calibrating electromagnetic field sensor for locating buried conduits
GB2255832A (en) * 1991-05-14 1992-11-18 Mark Ian Howell Locating buried object having an associated electromagnetic field
EP0520102A1 (en) * 1991-06-26 1992-12-30 YOKOI MANUFACTURING CO., Ltd Device for location of embedded objects
US5438266A (en) * 1993-12-07 1995-08-01 B.C. Hydro And Power Authority Instrument to locate buried conductors by providing an indication of phase reversal of the signal utilizing the odd harmonic and the even harmonic when a vertical axis coil passes over one of the buried conductors
US6140819A (en) * 1998-05-26 2000-10-31 Heath Consultants, Inc. Continuous-depth-indicating underground pipe and cable locator
GB2453199A (en) * 2007-09-28 2009-04-01 Charles Machine Works Magnetic field locator with two tri-axial antennas
US7952357B2 (en) 2007-09-28 2011-05-31 The Charles Machines Works, Inc. Receiver system for determining the location of a magnetic field source
GB2453199B (en) * 2007-09-28 2012-03-14 Charles Machine Works Locator using two horizontally displaced measurement points
US8482286B2 (en) 2007-09-28 2013-07-09 The Charles Machine Works, Inc. Method for guiding a downhole tool assembly using an above-ground receiver system
US9547101B2 (en) 2007-09-28 2017-01-17 The Charles Machine Works, Inc. System for tracking a downhole tool assembly using dual above-ground receiver assemblies
US11397266B2 (en) 2018-08-29 2022-07-26 Subsite, Llc GPS assisted walkover locating system and method
US12007491B2 (en) 2022-07-05 2024-06-11 The Charles Machine Works, Inc. GPS assisted walkover locating system and method

Also Published As

Publication number Publication date
GB2006438B (en) 1982-03-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee