GB1488847A - Detection and location of conductors carrying time varying currents - Google Patents

Detection and location of conductors carrying time varying currents

Info

Publication number
GB1488847A
GB1488847A GB5188874A GB5188874A GB1488847A GB 1488847 A GB1488847 A GB 1488847A GB 5188874 A GB5188874 A GB 5188874A GB 5188874 A GB5188874 A GB 5188874A GB 1488847 A GB1488847 A GB 1488847A
Authority
GB
United Kingdom
Prior art keywords
harmonic
time varying
conductor
carrying time
location
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
GB5188874A
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.)
SERVOTRON INSTR Ltd
Original Assignee
SERVOTRON INSTR 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 SERVOTRON INSTR Ltd filed Critical SERVOTRON INSTR Ltd
Priority to GB5188874A priority Critical patent/GB1488847A/en
Publication of GB1488847A publication Critical patent/GB1488847A/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)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

1488847 Locating conductors SERVOTRON INSTRUMENTS Ltd 28 Nov 1975 [29 Nov 1974] 51888/74 Heading G1N A method for detecting and locating a conductor carrying time varying currents such as a power system conductor 28 involves effecting relative movement between induction coils 20, 22 and the conductor; amplifying at 32 the induced current; selecting at least one harmonic, say the fifth preferably by use of a band-pass filter 34, of the induced current, which harmonic is rectified 36 and drives a meter 38. The induction coil system 30 is tuned with a fixed capacitor Cl to resonate at the fifth harmonic 250 hertz. In alternative embodiments Figs. 1 and 2 (not shown) the induction coil system is a single coil (12), or two coils (14, 16) on a common former (18) and connected series-aiding.
GB5188874A 1975-11-28 1975-11-28 Detection and location of conductors carrying time varying currents Expired GB1488847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5188874A GB1488847A (en) 1975-11-28 1975-11-28 Detection and location of conductors carrying time varying currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5188874A GB1488847A (en) 1975-11-28 1975-11-28 Detection and location of conductors carrying time varying currents

Publications (1)

Publication Number Publication Date
GB1488847A true GB1488847A (en) 1977-10-12

Family

ID=10461797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5188874A Expired GB1488847A (en) 1975-11-28 1975-11-28 Detection and location of conductors carrying time varying currents

Country Status (1)

Country Link
GB (1) GB1488847A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117909A (en) * 1982-03-11 1983-10-19 Robert Charles Franklin Device for locating objects behind surfaces
WO1984000423A1 (en) * 1982-07-09 1984-02-02 Laszlo Szedlmajer A method and apparatus for determining the trace and depth of underground metallic conductors
GB2138613A (en) * 1983-03-16 1984-10-24 Sarasota Automation Inductive loop sensor
US5907242A (en) * 1995-05-15 1999-05-25 The Charles Machine Works, Inc. Balanced passive bandpass filter and preamplifier for a receiver
GB2400674A (en) * 2003-03-31 2004-10-20 Radiodetection Ltd Electromagnetic cable detection with noise filter

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117909A (en) * 1982-03-11 1983-10-19 Robert Charles Franklin Device for locating objects behind surfaces
GB2159630A (en) * 1982-03-11 1985-12-04 Robert Charles Franklin Device for locating objects behind surfaces
WO1984000423A1 (en) * 1982-07-09 1984-02-02 Laszlo Szedlmajer A method and apparatus for determining the trace and depth of underground metallic conductors
GB2138613A (en) * 1983-03-16 1984-10-24 Sarasota Automation Inductive loop sensor
US5907242A (en) * 1995-05-15 1999-05-25 The Charles Machine Works, Inc. Balanced passive bandpass filter and preamplifier for a receiver
GB2400674A (en) * 2003-03-31 2004-10-20 Radiodetection Ltd Electromagnetic cable detection with noise filter
US6977508B2 (en) 2003-03-31 2005-12-20 Radiodetection Limited Cable detection apparatus and method
GB2400674B (en) * 2003-03-31 2007-01-31 Radiodetection Ltd Cable detection apparatus and method
GB2429298A (en) * 2003-03-31 2007-02-21 Radiodetection Ltd Cable detection apparatus and method
US7235980B2 (en) 2003-03-31 2007-06-26 Radiodetection Limited Cable detection apparatus and method
GB2429298B (en) * 2003-03-31 2007-09-26 Radiodetection Ltd Cable detection apparatus and method
DE102004015889B4 (en) * 2003-03-31 2015-05-21 Radiodetection Ltd. Device and method for locating cables

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Legal Events

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