GB1509380A - Underground metal pipe or cable location - Google Patents

Underground metal pipe or cable location

Info

Publication number
GB1509380A
GB1509380A GB25485/75A GB2548575A GB1509380A GB 1509380 A GB1509380 A GB 1509380A GB 25485/75 A GB25485/75 A GB 25485/75A GB 2548575 A GB2548575 A GB 2548575A GB 1509380 A GB1509380 A GB 1509380A
Authority
GB
United Kingdom
Prior art keywords
coils
receiver
signals
metal pipe
outputs
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.)
Expired
Application number
GB25485/75A
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.)
Radiodetection Ltd
Original Assignee
Electrolocation Ltd
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 Electrolocation Ltd filed Critical Electrolocation Ltd
Priority to GB25485/75A priority Critical patent/GB1509380A/en
Priority to SE7606703A priority patent/SE7606703L/en
Priority to FR7618005A priority patent/FR2314507A1/en
Priority to JP51069627A priority patent/JPS588477B2/en
Priority to NL7606428A priority patent/NL7606428A/en
Priority to BE167901A priority patent/BE842931A/en
Priority to DE2626532A priority patent/DE2626532C2/en
Priority to AU14924/76A priority patent/AU1492476A/en
Publication of GB1509380A publication Critical patent/GB1509380A/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
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
    • 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)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Electromagnetism (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

1509380 Indicating presence or absence of buried metal objects ELECTROLOCATION Ltd 13 Sept 1976 [14 June 1975] 25485/75 Heading G1N An instrument for determining the presence or absence of a buried cable or metal pipe comprises an array of aerials defining the corners of a multisided area and a receiver for comparing the phases of the signals produced in the coils and indicating whether the signals are in or out of phase. The aerials may be pivotably mounted. The receiver comprises a YES/NO meter to indicate phase equality or inequality and may include a phase discriminator for comparing the outputs from all the coils, Fig. 3A (not shown). Alternatively the receiver uses one coil output as a reference signal and the compares the reference signal with the signals from the other coils, Fig. 3B (not shown). The receiver may combine the outputs of the coils and compare the combined output with the output of one of the coils in a phase detector. Fig. 3C (not shown). The coil outputs in this case are passed through respective high-pass/low-pass amplifiers. The receiver may monitor the signals from the coil at two different frequencies simultaneously, Fig. 3D (not shown). The cable or metal pipe may require to be excited by the use of a generator.
GB25485/75A 1975-06-14 1975-06-14 Underground metal pipe or cable location Expired GB1509380A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB25485/75A GB1509380A (en) 1975-06-14 1975-06-14 Underground metal pipe or cable location
SE7606703A SE7606703L (en) 1975-06-14 1976-06-11 INSTRUMENT FOR DETERMINING THE NERVARO OR ABSENCE OF A MIND CABLE OR A MIND PIPE
FR7618005A FR2314507A1 (en) 1975-06-14 1976-06-14 METHOD AND APPARATUS FOR DETECTION OF UNDERGROUND CONDUCTORS
JP51069627A JPS588477B2 (en) 1975-06-14 1976-06-14 Method and device for detecting whether underground pipes or cables exist in the area to be investigated
NL7606428A NL7606428A (en) 1975-06-14 1976-06-14 DEVICE FOR DETERMINING THE PRESENCE OF UNDERGROUND PIPES OR CABLES.
BE167901A BE842931A (en) 1975-06-14 1976-06-14 IMPROVEMENTS RELATING TO THE LOCATION OF UNDERGROUND CABLES OR DUCTS
DE2626532A DE2626532C2 (en) 1975-06-14 1976-06-14 Device for examining an area for freedom from underground electrical cables and metal pipelines
AU14924/76A AU1492476A (en) 1975-06-14 1976-06-15 Underground pipe or cable location

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25485/75A GB1509380A (en) 1975-06-14 1975-06-14 Underground metal pipe or cable location

Publications (1)

Publication Number Publication Date
GB1509380A true GB1509380A (en) 1978-05-04

Family

ID=10228467

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25485/75A Expired GB1509380A (en) 1975-06-14 1975-06-14 Underground metal pipe or cable location

Country Status (8)

Country Link
JP (1) JPS588477B2 (en)
AU (1) AU1492476A (en)
BE (1) BE842931A (en)
DE (1) DE2626532C2 (en)
FR (1) FR2314507A1 (en)
GB (1) GB1509380A (en)
NL (1) NL7606428A (en)
SE (1) SE7606703L (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125741A2 (en) * 1983-01-20 1984-11-21 Scopemoor Limited Detector for buried objects
GB2174203A (en) * 1985-04-19 1986-10-29 Plessey Co Plc Underground cable detectors and methods of detecting such cables
GB2215063A (en) * 1988-02-18 1989-09-13 Tokyo Gas Co Ltd Detecting buried conductors
GB2255832A (en) * 1991-05-14 1992-11-18 Mark Ian Howell Locating buried object having an associated electromagnetic field
US5361029A (en) * 1990-06-18 1994-11-01 The Charles Machine Works, Inc. System for locating multiple concealed underground objects
EP0682270A2 (en) * 1994-05-11 1995-11-15 British Gas plc Method and apparatus locating a buried element
WO2009111518A1 (en) * 2008-03-06 2009-09-11 Zircon Corporation Ratiometric ac wire tracer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0370963U (en) * 1990-11-05 1991-07-17
DE19518420C2 (en) * 1995-05-19 1998-01-02 Diether Alfred Schroeder Circuit arrangement for use in a geophysical prospecting process

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR960966A (en) * 1950-04-28
JPS5148805Y2 (en) * 1971-12-02 1976-11-25

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125741A2 (en) * 1983-01-20 1984-11-21 Scopemoor Limited Detector for buried objects
EP0125741A3 (en) * 1983-01-20 1986-06-25 Scopemoor Limited Detector for buried objects
US4719426A (en) * 1983-01-20 1988-01-12 Scopemoor Limited Method for magnetically detecting a localized disturbance of the ground
GB2174203A (en) * 1985-04-19 1986-10-29 Plessey Co Plc Underground cable detectors and methods of detecting such cables
GB2215063A (en) * 1988-02-18 1989-09-13 Tokyo Gas Co Ltd Detecting buried conductors
US5361029A (en) * 1990-06-18 1994-11-01 The Charles Machine Works, Inc. System for locating multiple concealed underground objects
GB2255832A (en) * 1991-05-14 1992-11-18 Mark Ian Howell Locating buried object having an associated electromagnetic field
EP0682270A2 (en) * 1994-05-11 1995-11-15 British Gas plc Method and apparatus locating a buried element
EP0682270A3 (en) * 1994-05-11 1997-02-19 British Gas Plc Method and apparatus locating a buried element.
WO2009111518A1 (en) * 2008-03-06 2009-09-11 Zircon Corporation Ratiometric ac wire tracer
US7671576B2 (en) 2008-03-06 2010-03-02 Zircon Corporation Ratiometric AC wire tracer
CN101960332A (en) * 2008-03-06 2011-01-26 泽肯公司 Ratiometric AC wire tracer
CN101960332B (en) * 2008-03-06 2014-11-05 泽肯公司 Ratiometric AC wire tracer

Also Published As

Publication number Publication date
JPS5231766A (en) 1977-03-10
FR2314507B3 (en) 1979-03-02
DE2626532A1 (en) 1976-12-30
FR2314507A1 (en) 1977-01-07
DE2626532C2 (en) 1984-10-31
SE7606703L (en) 1976-12-15
AU1492476A (en) 1977-12-22
NL7606428A (en) 1976-12-16
JPS588477B2 (en) 1983-02-16
BE842931A (en) 1976-10-01

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Legal Events

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