GB1450577A - Apparatus for measuring the size of subterranean cavities - Google Patents
Apparatus for measuring the size of subterranean cavitiesInfo
- 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
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.
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)
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 |
-
1973
- 1973-08-13 GB GB3820773A patent/GB1450577A/en not_active Expired
Cited By (6)
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 |