GB1450577A - Apparatus for measuring the size of subterranean cavities - Google Patents

Apparatus for measuring the size of subterranean cavities

Info

Publication number
GB1450577A
GB1450577A GB3820773A GB3820773A GB1450577A GB 1450577 A GB1450577 A GB 1450577A GB 3820773 A GB3820773 A GB 3820773A GB 3820773 A GB3820773 A GB 3820773A GB 1450577 A GB1450577 A GB 1450577A
Authority
GB
United Kingdom
Prior art keywords
container
mirror
measuring
cavity
size
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
GB3820773A
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.)
British Gas Corp
Original Assignee
British Gas Corp
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 British Gas Corp filed Critical British Gas Corp
Priority to GB3820773A priority Critical patent/GB1450577A/en
Publication of GB1450577A publication Critical patent/GB1450577A/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
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
    • 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
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/46—Indirect determination of position data

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1450577 Measuring the size of subterranean cavities BRITISH GAS CORP 9 Aug 1974 [13 Aug 1973] 38207/73 Heading H4D In a device for measuring the size of subterranean cavities radiation from a mercury arc lamp 13, 14 is directed via a lens 15 and a continuously (or stepwise) rotatable mirror 6 to the wall of the cavity P and the reflected light is received by a photodiode or a photomultiplier 19 via a lens 18 when a further rotating mirror 7 is in a particular angular position relative to the instantaneous position of the mirror 6 (see Fig. 2, where "H" is the known distance between the mirror axes and "L" is the unknown distance away of the cavity wall). The device is encased in a container 1 suspended on a cable 3 connected to a winching machine for selectively adjusting the container's vertical position in the cavern, and its angular position is adjusted by drive means 4 for rotating a lower portion 1 of the container relative to a head section 2. The amount :of rotation may be sensed by a gyro-compass 5 with respect to terrestrial magnetic north/south poles. The description discloses a block diagram (Fig. 4, not shown) for processing the signals representative of the mirror's position obtained from an up/down counter controlling motors 11, 12 which rotate the mirrors 6 and 7, these position signals are then sent through the cable 3 and processed with the vertical and overall angular position of the container by a computer on the Earth's surface. The description also deals with features incorporated in the container to cope with varying magnitudes of pressure in the cavity, including a "brine" sensor to sense when the container has been lowered too far.
GB3820773A 1973-08-13 1973-08-13 Apparatus for measuring the size of subterranean cavities Expired GB1450577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3820773A GB1450577A (en) 1973-08-13 1973-08-13 Apparatus for measuring the size of subterranean cavities

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3820773A GB1450577A (en) 1973-08-13 1973-08-13 Apparatus for measuring the size of subterranean cavities

Publications (1)

Publication Number Publication Date
GB1450577A true GB1450577A (en) 1976-09-22

Family

ID=10401951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3820773A Expired GB1450577A (en) 1973-08-13 1973-08-13 Apparatus for measuring the size of subterranean cavities

Country Status (1)

Country Link
GB (1) GB1450577A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402188A1 (en) * 1977-09-02 1979-03-30 Electric Power Res Inst METHOD AND APPARATUS FOR MEASURING THE DIMENSIONS OF A CAVITY
WO1979000189A1 (en) * 1977-10-06 1979-04-19 T Celio Process and device for measuring a distance by telemetry
FR2535451A1 (en) * 1982-10-29 1984-05-04 Renault Apparatus for an optical triangulation measurement to determine the position of an object and record its profile
GB2131642A (en) * 1982-12-01 1984-06-20 Daimler Benz Ag Obstacle detection; vehicle parking aid
EP0134772A1 (en) * 1983-07-19 1985-03-20 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Method for the registration of the topographic card of the charged mass in a shaft furnace
DE3503488A1 (en) * 1985-01-30 1986-07-31 Prakla-Seismos Gmbh, 3000 Hannover Method and device for echometric measurement of a subterranean cavern

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402188A1 (en) * 1977-09-02 1979-03-30 Electric Power Res Inst METHOD AND APPARATUS FOR MEASURING THE DIMENSIONS OF A CAVITY
WO1979000189A1 (en) * 1977-10-06 1979-04-19 T Celio Process and device for measuring a distance by telemetry
FR2535451A1 (en) * 1982-10-29 1984-05-04 Renault Apparatus for an optical triangulation measurement to determine the position of an object and record its profile
GB2131642A (en) * 1982-12-01 1984-06-20 Daimler Benz Ag Obstacle detection; vehicle parking aid
EP0134772A1 (en) * 1983-07-19 1985-03-20 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Method for the registration of the topographic card of the charged mass in a shaft furnace
DE3503488A1 (en) * 1985-01-30 1986-07-31 Prakla-Seismos Gmbh, 3000 Hannover Method and device for echometric measurement of a subterranean cavern

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee