CA2084656A1 - Sub-audio magnetics instrument - Google Patents

Sub-audio magnetics instrument

Info

Publication number
CA2084656A1
CA2084656A1 CA2084656A CA2084656A CA2084656A1 CA 2084656 A1 CA2084656 A1 CA 2084656A1 CA 2084656 A CA2084656 A CA 2084656A CA 2084656 A CA2084656 A CA 2084656A CA 2084656 A1 CA2084656 A1 CA 2084656A1
Authority
CA
Canada
Prior art keywords
detector
pct
measured
cutoff
sec
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
CA2084656A
Other languages
French (fr)
Other versions
CA2084656C (en
Inventor
John Stanley
Malcolm K. Cattach
Stephen J. Lee
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.)
GAP GEOPHYSICS Pty Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2084656A1 publication Critical patent/CA2084656A1/en
Application granted granted Critical
Publication of CA2084656C publication Critical patent/CA2084656C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat
    • 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

Abstract

PCT No. PCT/AU91/00238 Sec. 371 Date Feb. 5, 1993 Sec. 102(e) Date Feb. 5, 1993 PCT Filed Jun. 3, 1991 PCT Pub. No. WO91/19210 PCT Pub. Date Dec. 12, 1991.A method and a device for implementing the method, for geophysical surveying of an area (1) including continuous measurement of the earth's magnetic and electromagnetic field using a detector (6) held at a constant height (E) above the ground surface, in the order of one meter, while traversing in a criss-cross manner over the area (1) at speeds below a maximum speed (S), in the order of 10 km/h, and utilizing measured signal frequencies below a cutoff (F), being approximately the maximum speed (S) divided by twice the detector height (E), to indicate spatial variations in the measured field. Traversal distance can be measured on board the host vehicle and a real time output supplied. Simultaneously, using the same detector (6) and artificially induced magnetic fields generated by an inductive (2b and/or galvanic source (2a)), temporally varying fields having frequencies above the cutoff (F) can be measured and simply filtered out of the detector's (6) output for separate processing and storage. Temporally varying fields below the cutoff (F) can be detected by a synchronized stationary detector inputting to the processing equipment (10) so as to subtract such signals from the signals used to measure spatial field variations.
CA002084656A 1990-06-06 1991-06-03 Sub-audio magnetics instrument Expired - Lifetime CA2084656C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPK051690 1990-06-06
AUPK0516 1990-06-06

Publications (2)

Publication Number Publication Date
CA2084656A1 true CA2084656A1 (en) 1991-12-07
CA2084656C CA2084656C (en) 1999-03-16

Family

ID=3774741

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002084656A Expired - Lifetime CA2084656C (en) 1990-06-06 1991-06-03 Sub-audio magnetics instrument

Country Status (12)

Country Link
US (1) US5444374A (en)
EP (1) EP0532604B1 (en)
JP (1) JP2939334B2 (en)
AT (1) ATE136371T1 (en)
AU (1) AU652374B2 (en)
CA (1) CA2084656C (en)
DE (1) DE69118532T2 (en)
DK (1) DK0532604T3 (en)
ES (1) ES2088005T3 (en)
GR (1) GR3020447T3 (en)
RU (1) RU2095828C1 (en)
WO (1) WO1991019210A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPM352394A0 (en) * 1994-01-25 1994-02-17 University Of New England, The Method of interpreting potential field data
AU681492B2 (en) * 1994-01-25 1997-08-28 Geophysical Technology Limited Method of interpreting potential field data
AU2002300628B2 (en) * 2001-08-23 2007-11-08 Xstrata Copper Exploration Pty Ltd A data aquisition system
AUPR723201A0 (en) * 2001-08-23 2001-09-13 M.I.M. Exploration Pty. Ltd. A data aquisition system
AU2008210272A1 (en) * 2007-01-31 2008-08-07 Andrew Duncan Method and apparatus for analysing geological features
NO328811B1 (en) * 2007-12-21 2010-05-18 Advanced Hydrocarbon Mapping A Method and apparatus for rapid mapping of submarine hydrocarbon reservoirs
CN101556340B (en) * 2008-04-10 2011-08-03 中国石油集团东方地球物理勘探有限责任公司 Three-dimensional small surface element magnetotelluric continuous array data acquisition method
US8686723B2 (en) * 2010-03-22 2014-04-01 Schlumberger Technology Corporation Determining the larmor frequency for NMR tools
CN102590875B (en) * 2012-03-01 2013-12-18 赤峰宏远地质勘查有限公司唐山迁西分公司 Remote sensing geophysical exploration system and remote sensing geophysical exploration method
US9316758B2 (en) 2013-05-29 2016-04-19 Liquid Robotics Oil and Gas LLC Earth surveying for improved drilling applications
US11061160B1 (en) * 2015-07-24 2021-07-13 Doc Mapping, L.L.C. System and methods of mapping buried pipes underwater
CN105204072B (en) * 2015-09-16 2017-08-29 吉林大学 Carbon electrode and measuring method in high-density electric instrument
CN108254271B (en) * 2016-12-28 2020-10-30 深圳市弗赛特科技股份有限公司 Fatigue test measuring method
RU2677954C1 (en) * 2017-01-10 2019-01-22 Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации Федеральное государственное бюджетное учреждение "48 Центральный научно-исследовательский институт" Министерства обороны Российской Федерации Method of monitoring the stage of cultivation in the technology of the plague vaccine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777112A (en) * 1953-11-12 1957-01-08 United Geophysical Corp Magnetometer survey apparatus
US3889181A (en) * 1974-03-08 1975-06-10 Us Army Magnetic system for discriminating between vehicles and personnel based upon their characteristic frequency signatures
US4021725A (en) * 1976-03-05 1977-05-03 The United States Of America As Represented By The Secretary Of The Navy Mobile mine detection system having plural color display
US5025218A (en) * 1979-04-23 1991-06-18 The United States Of America As Represented By The Secretary Of The Navy Pulsed field system for detecting the presence of a target in a subsurface environment
CA1133058A (en) * 1982-02-18 1982-10-05 Geonics Limited Electromagnetic geophysical surveying system
US5030913A (en) * 1982-06-21 1991-07-09 The United States Of America As Represented By The Secretary Of The Navy Multiple sensor magnetometer with temporal noise rejection and controllable spatial response on a moving platform
US4814711A (en) * 1984-04-05 1989-03-21 Deseret Research, Inc. Survey system and method for real time collection and processing of geophysicals data using signals from a global positioning satellite network
US4675606A (en) * 1985-07-29 1987-06-23 Suman Ganguly Magnetometers for detecting metallic objects in earth's magnetic field
US4727329A (en) * 1986-02-19 1988-02-23 Atlantic Richfield Company Method and system for measuring displacement of buried fluid transmission pipelines
US4939460A (en) * 1987-12-14 1990-07-03 Patla Louis J Indigenous electromagnetic radiation based method for detecting geologic deposits
US5175500A (en) * 1990-08-01 1992-12-29 Geonics Limited Method and apparatus for surveying terrain resistivity utilizing available VFL electromagnetic fields

Also Published As

Publication number Publication date
AU652374B2 (en) 1994-08-25
EP0532604A1 (en) 1993-03-24
WO1991019210A1 (en) 1991-12-12
CA2084656C (en) 1999-03-16
RU2095828C1 (en) 1997-11-10
DE69118532D1 (en) 1996-05-09
DK0532604T3 (en) 1996-07-29
EP0532604A4 (en) 1993-06-09
JP2939334B2 (en) 1999-08-25
ATE136371T1 (en) 1996-04-15
JPH06500172A (en) 1994-01-06
DE69118532T2 (en) 1996-10-31
ES2088005T3 (en) 1996-08-01
AU8082791A (en) 1991-12-31
EP0532604B1 (en) 1996-04-03
US5444374A (en) 1995-08-22
GR3020447T3 (en) 1996-10-31

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202