GB1509914A - Detector systems for electromagnetic surveying - Google Patents

Detector systems for electromagnetic surveying

Info

Publication number
GB1509914A
GB1509914A GB2437874A GB2437874A GB1509914A GB 1509914 A GB1509914 A GB 1509914A GB 2437874 A GB2437874 A GB 2437874A GB 2437874 A GB2437874 A GB 2437874A GB 1509914 A GB1509914 A GB 1509914A
Authority
GB
United Kingdom
Prior art keywords
coils
detector
detector systems
electromagnetic surveying
parallel
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
GB2437874A
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 GB2437874A priority Critical patent/GB1509914A/en
Publication of GB1509914A publication Critical patent/GB1509914A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

1509914 Detecting hidden objects ELECTROLOCATION Ltd 23 May 1975 [1 June 1974] 24378/74 Heading G1N A detector system for detecting underground objects, e.g. pipes and telephone cables, comprises two detector coils 23 and 67 mounted with axes parallel, horizontal and at a predetermined vertical spacing and connected in antiphase to a meter giving direct depth indication. Each detector coil may be a pair of coils (e.g. 2 and 23) joined in parallel or series. The coils are cored with ferrite rods and mounted on a square frame 1 with adjustable length of side. The coils themselves may also be adjustably positioned on the frame sides. Alternatively, the coils may be mounted on an upright I-shaped member (not shown).
GB2437874A 1975-05-23 1975-05-23 Detector systems for electromagnetic surveying Expired GB1509914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2437874A GB1509914A (en) 1975-05-23 1975-05-23 Detector systems for electromagnetic surveying

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2437874A GB1509914A (en) 1975-05-23 1975-05-23 Detector systems for electromagnetic surveying

Publications (1)

Publication Number Publication Date
GB1509914A true GB1509914A (en) 1978-05-04

Family

ID=10210797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2437874A Expired GB1509914A (en) 1975-05-23 1975-05-23 Detector systems for electromagnetic surveying

Country Status (1)

Country Link
GB (1) GB1509914A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045486A2 (en) * 1980-07-31 1982-02-10 Metrotech Corporation Apparatus for determining the distance to a concealed conductive object
US4317079A (en) * 1978-09-04 1982-02-23 Kokusai Denshin Denwa Co. Ltd. Buried cable locating system
GB2135460A (en) * 1983-01-20 1984-08-30 Scopemoor Ltd Detecting hidden objects
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
US4691165A (en) * 1982-07-09 1987-09-01 Laszlo Szedlmajer Method and apparatus including spaced antennas for determining the trace and depth of underground metallic conductors
GB2215063A (en) * 1988-02-18 1989-09-13 Tokyo Gas Co Ltd Detecting buried conductors
WO1990000259A1 (en) * 1988-06-28 1990-01-11 Radiodetection Limited System for detecting the location and orientation of an object
EP0417959A2 (en) * 1989-09-12 1991-03-20 Utilx Corporation An assembly for locating the position of an object
GB2255832A (en) * 1991-05-14 1992-11-18 Mark Ian Howell Locating buried object having an associated electromagnetic field
US5264795A (en) * 1990-06-18 1993-11-23 The Charles Machine Works, Inc. System transmitting and receiving digital and analog information for use in locating concealed conductors
WO1994017429A1 (en) * 1993-01-29 1994-08-04 Minnesota Mining And Manufacturing Company Apparatus for locating buried conductors
US5764127A (en) * 1995-03-17 1998-06-09 Radiodetection Limited Inductive transmitters for conductor location
US6140819A (en) * 1998-05-26 2000-10-31 Heath Consultants, Inc. Continuous-depth-indicating underground pipe and cable locator

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317079A (en) * 1978-09-04 1982-02-23 Kokusai Denshin Denwa Co. Ltd. Buried cable locating system
EP0045486A2 (en) * 1980-07-31 1982-02-10 Metrotech Corporation Apparatus for determining the distance to a concealed conductive object
US4387340A (en) * 1980-07-31 1983-06-07 Metrotech, Inc. Apparatus for determining the distance to a concealed conductive object which is radiating an alternating current signal
EP0045486B1 (en) * 1980-07-31 1985-12-04 Metrotech Corporation Apparatus for determining the distance to a concealed conductive object
US4691165A (en) * 1982-07-09 1987-09-01 Laszlo Szedlmajer Method and apparatus including spaced antennas for determining the trace and depth of underground metallic conductors
GB2135460A (en) * 1983-01-20 1984-08-30 Scopemoor Ltd Detecting hidden objects
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
WO1990000259A1 (en) * 1988-06-28 1990-01-11 Radiodetection Limited System for detecting the location and orientation of an object
GB2230342A (en) * 1988-06-28 1990-10-17 Radiodetection Ltd System for detecting the location and orientation of an object
US5014008A (en) * 1988-06-28 1991-05-07 Radiodetection Limited System for detecting the location and orientation of a temporarily inaccessible object
GB2230342B (en) * 1988-06-28 1992-12-16 Radiodetection Ltd System for detecting the location and orientation of an object
EP0417959A2 (en) * 1989-09-12 1991-03-20 Utilx Corporation An assembly for locating the position of an object
EP0417959A3 (en) * 1989-09-12 1992-05-06 Flowmole Corporation An assembly for locating the position of an object
US5264795A (en) * 1990-06-18 1993-11-23 The Charles Machine Works, Inc. System transmitting and receiving digital and analog information for use in locating concealed conductors
GB2255832A (en) * 1991-05-14 1992-11-18 Mark Ian Howell Locating buried object having an associated electromagnetic field
WO1994017429A1 (en) * 1993-01-29 1994-08-04 Minnesota Mining And Manufacturing Company Apparatus for locating buried conductors
CN1037550C (en) * 1993-01-29 1998-02-25 明尼苏达矿产制造公司 Apparatus for locating buried conductors
US5764127A (en) * 1995-03-17 1998-06-09 Radiodetection Limited Inductive transmitters for conductor location
US6140819A (en) * 1998-05-26 2000-10-31 Heath Consultants, Inc. Continuous-depth-indicating underground pipe and cable locator

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Legal Events

Date Code Title Description
PS Patent sealed
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
SP Amendment (slips) printed
PE20 Patent expired after termination of 20 years

Effective date: 19950522