GB827843A - Improvements in or relating to apparatus for detecting and exploring electrically conductive bodies - Google Patents

Improvements in or relating to apparatus for detecting and exploring electrically conductive bodies

Info

Publication number
GB827843A
GB827843A GB8225/59A GB822559A GB827843A GB 827843 A GB827843 A GB 827843A GB 8225/59 A GB8225/59 A GB 8225/59A GB 822559 A GB822559 A GB 822559A GB 827843 A GB827843 A GB 827843A
Authority
GB
United Kingdom
Prior art keywords
aircraft
receivers
feb
transmitter
phase difference
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
GB8225/59A
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.)
ERIK HELMER LAURENTIUS HEDSTRO
Original Assignee
ERIK HELMER LAURENTIUS HEDSTRO
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 ERIK HELMER LAURENTIUS HEDSTRO filed Critical ERIK HELMER LAURENTIUS HEDSTRO
Publication of GB827843A publication Critical patent/GB827843A/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
    • G01V3/15—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
    • G01V3/165—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 operating with magnetic or electric fields produced or modified by the object or by the detecting device

Abstract

827,843. Electric tests. HEDSTROM, E. H. L., and TEGHOLM, R. V. Feb. 3, 1956 [Feb. 3, 1955], No. 8225/59. Divided out of 827,842. Class 37. Geophysical surveying apparatus comprises a transmitting unit for setting up an alternating field and spaced receivers carried by a surveying vehicle and feeding devices which indicate the field variation over the receiver spacing. In the arrangement shown in Fig. 4 the transmitting coil is mounted in an aircraft 61 while the two receiving coils are in " birds " 62, 63, or the transmitter may be in an aircraft and the receivers in a glider towed by the aircraft, or a second aircraft behind the first. In a still further arrangement a pair of aircraft side by side carry or tow the transmitter and receivers respectively the receivers being arranged in tandem. The outputs of the two receivers are amplified and the following measurements made: (1) phase difference between the two output signals, (2) rate of change of this phase difference, (3) difference or ratio of the output voltages, (4) rate of change of the ratio. The output of one of the receiving coils only may be indicated to allow the pilot of the receivercarrying aircraft to maintain his spacing from the other aircraft.
GB8225/59A 1955-02-03 1956-02-03 Improvements in or relating to apparatus for detecting and exploring electrically conductive bodies Expired GB827843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE827843X 1955-02-03

Publications (1)

Publication Number Publication Date
GB827843A true GB827843A (en) 1960-02-10

Family

ID=20349404

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8225/59A Expired GB827843A (en) 1955-02-03 1956-02-03 Improvements in or relating to apparatus for detecting and exploring electrically conductive bodies

Country Status (1)

Country Link
GB (1) GB827843A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239787B (en) * 1961-11-10 1967-05-03 Geophysique Cie Gle Procedure and arrangement for soil investigation using electromagnetic waves
US8510047B2 (en) 2006-12-26 2013-08-13 Elta Systems Ltd. Method and system for monitoring an underground electric cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239787B (en) * 1961-11-10 1967-05-03 Geophysique Cie Gle Procedure and arrangement for soil investigation using electromagnetic waves
US8510047B2 (en) 2006-12-26 2013-08-13 Elta Systems Ltd. Method and system for monitoring an underground electric cable

Similar Documents

Publication Publication Date Title
US2794949A (en) Electromagnetic induction method and apparatus for prospecting
GB643167A (en) Improvements in and relating to time measuring apparatus
US2430244A (en) Radio beacon system
US3617866A (en) Geophysical surveying with audio frequency electromagnetic fields and orthogonal receiver coils
US3108220A (en) Electromagnetic method and apparatus for geophysical prospecting including means forgenerating an auxiliary flux field to cancel direct coupling between the primary and pick-up coils
GB1261732A (en) Electromagnetic exploration method and apparatus
US2003933A (en) Three dimension radio direction finder
US3015060A (en) Method and means of prospecting for electrically conducting bodies
GB827843A (en) Improvements in or relating to apparatus for detecting and exploring electrically conductive bodies
GB416246A (en) Improvements in or relating to wireless navigation aiding systems
ES250386A1 (en) Apparatus for investigating earth formations
GB827842A (en) Improvements in or relating to apparatus for detecting and exploring electrically conductive bodies
GB419783A (en) Improvements in and relating to wireless receiving apparatus
US2456401A (en) Interference eliminator for seismic recording systems
GB696809A (en) Improvements in object-locating systems
SU119639A1 (en) The method of electrical prospecting by the method of infinitely long cable
US3555408A (en) Method and means for airborne electromagnetic exploration utilizing the resultant transmitted electromagnetic field comprised of the primary field and secondary fields generated thereby in the aircraft
US2449532A (en) Indicator system for towed gliders
GB848428A (en) Electromagnetic exploration method
GB777402A (en) Electromagnetic survey apparatus
US2819398A (en) Commutator synchronizer
ES227056A1 (en) Improvements in or relating to geophysical survey apparatus
GB763184A (en) Apparatus for inductive prospecting
US2392328A (en) Directional radio receiver
SU828152A1 (en) Device for geoelectric prospecting