GB1496897A - Process and apparatus for the location of material discontinuities in geological deposits using electromagnetic waves - Google Patents

Process and apparatus for the location of material discontinuities in geological deposits using electromagnetic waves

Info

Publication number
GB1496897A
GB1496897A GB5287674A GB5287674A GB1496897A GB 1496897 A GB1496897 A GB 1496897A GB 5287674 A GB5287674 A GB 5287674A GB 5287674 A GB5287674 A GB 5287674A GB 1496897 A GB1496897 A GB 1496897A
Authority
GB
United Kingdom
Prior art keywords
transmitter
measurements
receiver
discontinuities
frequency
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
GB5287674A
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.)
K+S AG
Original Assignee
K+S AG
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
Priority claimed from DE19732360778 external-priority patent/DE2360778C3/en
Application filed by K+S AG filed Critical K+S AG
Publication of GB1496897A publication Critical patent/GB1496897A/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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1496897 Pulse radar KALI UND SALZ AG 6 Dec 1974 [6 Dec 1973] 52876/74 Heading H4D In a process which enables material discontinuities in geological formations to be located using transit time measurements of radio waves reflected from said discontinuities a transmitter of frequency 1 to 500 MHz radiates pulses of durations 0À1 to 1 micro-second at a recurrence frequency of 10 to 1000 Hz from underground locations along which it is possible to walk. The power and frequency of the transmitter are varied to suit the particular conditions of use. The pulses are recorded by means of receiving apparatus, having a resolution of 1/100 micro-second. The location of said material discontinuities are further determined by taking measurements with different spacings between transmitting and receiving aerials, or by making measurements with a receiving aerial having directional characteristics set at different orientations. As described, a transmitter comprises a secondary battery, a high-voltage solid state D.C. generator with an output of 0À1 mA at 20 kV, a resistance voltage-divider, two resistors feeding a variable spark gap, and a dipole aerial, which is fed with the D.C. voltage (Fig. 1, not shown). The receiver also comprises a dipole aerial, and it is provided with an amplifier and an oscilloscope, the display of which is photographed. As is shown in Fig. 3, the transmitter and the receiver may be spaced apart (e.g. > 5 m.) on respective stands in a mine gallery. Provision is made for synchronizing the receiver with the transmitter. Measurements may relate to the boundaries between rock salt and carnallite or anhydrite or clastic rocks &c.
GB5287674A 1973-12-06 1974-12-06 Process and apparatus for the location of material discontinuities in geological deposits using electromagnetic waves Expired GB1496897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732360778 DE2360778C3 (en) 1973-12-06 Method for locating material discontinuities in deposits and radio transmitters for this

Publications (1)

Publication Number Publication Date
GB1496897A true GB1496897A (en) 1978-01-05

Family

ID=5900051

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5287674A Expired GB1496897A (en) 1973-12-06 1974-12-06 Process and apparatus for the location of material discontinuities in geological deposits using electromagnetic waves

Country Status (8)

Country Link
JP (1) JPS5832353B2 (en)
BR (1) BR7410231A (en)
CA (1) CA1020627A (en)
DD (1) DD115227A5 (en)
ES (1) ES432670A1 (en)
FR (1) FR2254034B1 (en)
GB (1) GB1496897A (en)
IT (1) IT1024331B (en)

Also Published As

Publication number Publication date
DE2360778B2 (en) 1976-04-15
BR7410231A (en) 1976-06-08
CA1020627A (en) 1977-11-08
JPS5090502A (en) 1975-07-19
JPS5832353B2 (en) 1983-07-12
ES432670A1 (en) 1976-12-01
IT1024331B (en) 1978-06-20
DD115227A5 (en) 1975-09-12
DE2360778A1 (en) 1975-06-19
FR2254034B1 (en) 1982-05-14
FR2254034A1 (en) 1975-07-04

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Legal Events

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

Effective date: 19921206