DE3117021C2 - - Google Patents

Info

Publication number
DE3117021C2
DE3117021C2 DE3117021A DE3117021A DE3117021C2 DE 3117021 C2 DE3117021 C2 DE 3117021C2 DE 3117021 A DE3117021 A DE 3117021A DE 3117021 A DE3117021 A DE 3117021A DE 3117021 C2 DE3117021 C2 DE 3117021C2
Authority
DE
Germany
Prior art keywords
signal
locating device
channels
display device
coils
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
DE3117021A
Other languages
German (de)
English (en)
Other versions
DE3117021A1 (de
Inventor
Lloyd Harold Bristol Gb Sole
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 BRISTOL GB
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 BRISTOL GB filed Critical ELECTROLOCATION Ltd BRISTOL GB
Publication of DE3117021A1 publication Critical patent/DE3117021A1/de
Application granted granted Critical
Publication of DE3117021C2 publication Critical patent/DE3117021C2/de
Granted 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)
DE19813117021 1980-04-29 1981-04-29 Ortungsgeraet fuer verborgene stromfuehrende leiter Granted DE3117021A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8014094 1980-04-29

Publications (2)

Publication Number Publication Date
DE3117021A1 DE3117021A1 (de) 1982-02-18
DE3117021C2 true DE3117021C2 (enExample) 1987-11-12

Family

ID=10513072

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813117021 Granted DE3117021A1 (de) 1980-04-29 1981-04-29 Ortungsgeraet fuer verborgene stromfuehrende leiter

Country Status (4)

Country Link
US (1) US4427942A (enExample)
JP (1) JPS57572A (enExample)
DE (1) DE3117021A1 (enExample)
FR (1) FR2481459A1 (enExample)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8304330D0 (en) * 1983-02-16 1983-03-23 Howell M I Electromagnetic surveying of pipes and cables
CA1244083A (en) * 1985-07-25 1988-11-01 George Gee Instrument for sensing ferromagnetic bodies
DE3714009A1 (de) * 1987-04-27 1988-11-10 Hauni Werke Koerber & Co Kg Metalldetektor
US4818944A (en) * 1987-05-06 1989-04-04 Schonstedt Instrument Company Magnetic locating and tracing system and method using dual-antenna transmitter to distinguish between concealed adjacent objects
US5093622A (en) * 1989-03-17 1992-03-03 Minnesota Mining And Manufacturing Company Method and apparatus for determining direction to and position of an underground conductor
US5065098A (en) * 1990-06-18 1991-11-12 The Charles Machine Works, Inc. System for locating concealed underground objects using digital filtering
US5194816A (en) * 1990-10-19 1993-03-16 Westinghouse Electric Corp. Method and apparatus for locating electrical shorts between concealed conductive objects
CA2073266A1 (en) * 1991-07-09 1993-01-10 Mehmet Rona Distal targeting system
USH1217H (en) 1992-02-25 1993-08-03 The United States Of America As Represented By The Secretary Of The Navy Easily tunable detector for covering discontinuities in buried energized antenna ground wipes
US5365163A (en) * 1992-09-29 1994-11-15 Minnesota Mining And Manufacturing Company Sensor array for circuit tracer
US5471143A (en) * 1993-01-29 1995-11-28 Minnesota Mining And Manufacturing Co. Apparatus for locating buried conductors using phase-shifted signals
US5430379A (en) * 1993-08-27 1995-07-04 Minnesota Mining And Manufacturing Company Conductor locator adapter for electronic markers
US5670882A (en) * 1995-09-21 1997-09-23 Magnawand Inc. Ferrous target identification system with magnetic field polarity and gradient indication
US6130539A (en) * 1998-08-19 2000-10-10 Metrotech Corporation Automatic gain control for a line locator
US6407550B1 (en) * 1998-08-19 2002-06-18 Metrotech Corporation Line locator with accurate horizontal displacement detection
US6633163B2 (en) * 1999-04-28 2003-10-14 Radiodetection Limited Apparatus and method for detecting an underground cable while operating a piece of machinery
DE19925760C2 (de) * 1999-06-05 2003-02-20 Hagenuk Kmt Kabelmestechnik Gm Vorrichtung zur Bestimmung einer Einfallsrichtung von elektromagnetischen Wellen
GB0013620D0 (en) * 2000-06-06 2000-07-26 Howell Mark I A technique for finding the position and depth of any buried pipeline or cable accurately, even where it may be lying close to other long buried conductors
US6529006B1 (en) 2001-10-31 2003-03-04 Paul Hayes Method and apparatus for resolving the position and identity of buried conductive bodies
US6977508B2 (en) * 2003-03-31 2005-12-20 Radiodetection Limited Cable detection apparatus and method
US7671576B2 (en) * 2008-03-06 2010-03-02 Zircon Corporation Ratiometric AC wire tracer
US9568529B2 (en) 2014-10-03 2017-02-14 Ipeg Corporation Dual orientation buried asset locator device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3471772A (en) 1967-05-02 1969-10-07 Singer Inc H R B Instrument for measuring the range and approximate size of buried or hidden metal objects
JPS499388B1 (enExample) * 1968-05-25 1974-03-04
JPS5070054A (enExample) * 1973-10-24 1975-06-11
US3893025A (en) * 1974-02-01 1975-07-01 Plosser George G Apparatus for determining the distance to a concealed conductive structure
FR2353068A1 (fr) 1976-05-24 1977-12-23 Intersub Dev Sa Appareil de reperage d'un objet metallique allonge
GB2006438B (en) * 1977-08-02 1982-03-24 Electricity Council Portable apparatus for identifying on locating electric conductors
GB2004069B (en) * 1977-08-20 1982-04-21 Plessey Co Ltd Metal detectors
US4220913A (en) 1978-05-23 1980-09-02 Electrolocation Limited Apparatus for and methods of electromagnetic surveying of elongated underground conductors
GB2041531B (en) 1979-01-29 1983-09-14 British Gas Corp Detecting inaccessible objects

Also Published As

Publication number Publication date
DE3117021A1 (de) 1982-02-18
JPS57572A (en) 1982-01-05
US4427942A (en) 1984-01-24
FR2481459B1 (enExample) 1984-11-02
FR2481459A1 (fr) 1981-10-30

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8327 Change in the person/name/address of the patent owner

Owner name: RADIODETECTION LTD., BRISTOL, GB

8363 Opposition against the patent
8365 Fully valid after opposition proceedings
8339 Ceased/non-payment of the annual fee