GB1532710A - Underground object detection - Google Patents

Underground object detection

Info

Publication number
GB1532710A
GB1532710A GB2573476A GB2573476A GB1532710A GB 1532710 A GB1532710 A GB 1532710A GB 2573476 A GB2573476 A GB 2573476A GB 2573476 A GB2573476 A GB 2573476A GB 1532710 A GB1532710 A GB 1532710A
Authority
GB
United Kingdom
Prior art keywords
signal
antenna
radar
coupled
voltage
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
GB2573476A
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.)
Ohio State University
Original Assignee
Ohio State University
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 Ohio State University filed Critical Ohio State University
Priority to GB2573476A priority Critical patent/GB1532710A/en
Publication of GB1532710A publication Critical patent/GB1532710A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/0209—Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
    • 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
    • G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/885—Radar or analogous systems specially adapted for specific applications for ground probing

Abstract

1532710 Radar; aerials OHIO STATE UNIVERSITY 21 June 1976 25734/76 Headings H4D and H4A Apparatus is described for transmitting a very short high voltage impulse via an antenna into the ground as a radar-type signal to be reflected by metallic or non-metallic objects, e.g. buried pipes, to detect position of same by the reflected signal, which is received by a separate antenna and processed in a receiver wherein it is converted to digital form and may be stored, recalled and operated on, for example successive echo signals may be subtracted from prior ones, to facilitate object detection. The digital output signal may be displayed on a 2 dimensional array of light emitting diodes. The antenna, which is embodied in two forms, essentially comprises a crossed pair of mutually insulated, orthogonally disposed, resistively loaded, folded dipoles, coupled to the earth through a suitable lossy dielectric material. One antenna unit is coupled to the signal processor and the other is separately connected to the transmitter impulse source 10 which comprises a capacitor charged by a radar modulator circuit coupled to a gas breakdown tube which discharges the pulse when the voltage on the capacitor reaches the breakdown voltage thereof. In the signal processor 18, the received signal is stored in a high speed sample and hold circuit and quantized in a D to A converter. Details of various modes of operation of the processor are given to allow detection of objects in differing ground conditions.
GB2573476A 1976-06-21 1976-06-21 Underground object detection Expired GB1532710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2573476A GB1532710A (en) 1976-06-21 1976-06-21 Underground object detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2573476A GB1532710A (en) 1976-06-21 1976-06-21 Underground object detection

Publications (1)

Publication Number Publication Date
GB1532710A true GB1532710A (en) 1978-11-22

Family

ID=10232418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2573476A Expired GB1532710A (en) 1976-06-21 1976-06-21 Underground object detection

Country Status (1)

Country Link
GB (1) GB1532710A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178877A2 (en) * 1984-10-17 1986-04-23 British Gas Corporation Microwave reflection survey equipment
EP0179601A2 (en) * 1984-10-17 1986-04-30 British Gas Corporation Microwave reflection survey method
NL1016363C2 (en) * 2000-10-09 2002-04-10 T & A Radar B V Borehole radar tool for locating transitions or fractures in geological formation, includes transmitting and receiving antennas and reflector section extending near wall of housing
US6712140B2 (en) 2000-07-07 2004-03-30 T & A Survey B.V. 3rd borehole radar antenna and algorithm, method and apparatus for subsurface surveys
EP3100074A4 (en) * 2014-01-30 2017-11-08 3D-Radar AS Antenna system for ground penetrating radar

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178877A2 (en) * 1984-10-17 1986-04-23 British Gas Corporation Microwave reflection survey equipment
EP0179601A2 (en) * 1984-10-17 1986-04-30 British Gas Corporation Microwave reflection survey method
EP0178877A3 (en) * 1984-10-17 1987-04-15 British Gas Corporation Microwave reflection survey equipment & technique
EP0179601A3 (en) * 1984-10-17 1987-05-20 British Gas Corporation Microwave reflection survey equipment and technique
US4728897A (en) * 1984-10-17 1988-03-01 British Gas Corporation Microwave reflection survey technique for determining depth and orientation of buried objects
US4746867A (en) * 1984-10-17 1988-05-24 British Gas Corporation Antenna assembly for microwave reflection survey equipment
US6712140B2 (en) 2000-07-07 2004-03-30 T & A Survey B.V. 3rd borehole radar antenna and algorithm, method and apparatus for subsurface surveys
NL1016363C2 (en) * 2000-10-09 2002-04-10 T & A Radar B V Borehole radar tool for locating transitions or fractures in geological formation, includes transmitting and receiving antennas and reflector section extending near wall of housing
EP3100074A4 (en) * 2014-01-30 2017-11-08 3D-Radar AS Antenna system for ground penetrating radar
AU2015211492B2 (en) * 2014-01-30 2020-03-26 3D-Radar As Antenna system for ground penetrating radar

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Legal Events

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