GB1519971A - Acoustic recieiver for underground strata exploration - Google Patents
Acoustic recieiver for underground strata explorationInfo
- Publication number
- GB1519971A GB1519971A GB29135/75A GB2913575A GB1519971A GB 1519971 A GB1519971 A GB 1519971A GB 29135/75 A GB29135/75 A GB 29135/75A GB 2913575 A GB2913575 A GB 2913575A GB 1519971 A GB1519971 A GB 1519971A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transducers
- coupling element
- counter mass
- acoustic signals
- acoustic
- 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
- 230000008878 coupling Effects 0.000 abstract 8
- 238000010168 coupling process Methods 0.000 abstract 8
- 238000005859 coupling reaction Methods 0.000 abstract 8
- 239000011435 rock Substances 0.000 abstract 2
- 239000002775 capsule Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000011835 investigation Methods 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C39/00—Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Remote Sensing (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Acoustics & Sound (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
1519971 Seismic receivers RUHRKOHLE AG 10 July 1975 [13 July 1974] 29135/75 Heading G1G [Also in Division H4] An acoustic receiver, Fig. 1, for investigation of rock strata comprises a plurality of mechanical/ electrical transducers 3 attached to an elongate coupling element 1, arranged one behind the other along the longitudinal axis of the coupling element 1 and connected together both electrically and mechanically. A counter mass 5 is connected to the transducers in as free a manner as possible in relation to the coupling element 1. The transducers 3 may be arranged separately or in groups and be mounted at a central hole or at one side or on opposite sides of the element (1) Fig. 2 (not shown). Received acoustic signals set the element 1 and attached parts of the transducers 3 in vibration but, because of the inertia of the counter mass 5, deformation of the transducers 3 provides an electrical signal. High frequency signals require a relatively low mass 5 directly connected to the transducers 3. For measuring low frequency signals a larger counter mass 5, Fig. 3, is mounted by elastic strips 7 or by a diaphragm to the coupling element 1. The bridge 6 between the transducers 3 may be a delay line. Element 1 has a length to diameter ratio of at least 15:1. For receiving acoustic signals at an angle to the axis 4 of element 1 the direction of greatest sensitivity of transducers 3 is at a corresponding angle to the axis 4. By design of element 1 and suitable arrangement of transducers 3, reception of shear waves is possible. The transducers 3 may be of Piezo-electric or strain gauge types and are preferably sensitive to a narrow frequency range. The different transducers 3 may be tuned to different frequencies. They may be electrically connected directly to each other or a differential amplifier 8 is associated with each transducer 3, the outputs of the differential amplifiers 8 being combined by a transducer and/or RLC network, a single cable being connected to evaluation apparatus (not shown). The transducers 3, counter mass 5, bridge 6 and amplifier 8 may be symmetrically arranged around the coupling element 1. A fully encapsulated construction Fig. 4 (not shown) gives protection against fire damp and/or is electrically inherently safe and shields against electromagnetic interference. A cylinder (10) acts as the capsule and coupling element. Transducers 3 may be arranged in two groups (15, 16) Fig. 6 (not shown) each with a counter mass (5a, 5b) jointed by a part (17) of a coupling element (1) acting as a mechanical delay line and of length corresponding to #/2 of the frequency used. The transducers (3) are connected so that acoustic signals entering in the axial direction of the coupling element (1) are in phase whilst interference noise from other directions is suppressed. Several receivers may be arranged at distances corresponding to the wavelength of the acoustic signals and the electrical signals delivered by them made to undergo phase comparison, making possible spatial scanning of the strata. Noises emitted by living organisms enclosed in rock may be detected.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742433793 DE2433793C3 (en) | 1974-07-13 | Acoustic receiver for underground apron exploration |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1519971A true GB1519971A (en) | 1978-08-02 |
Family
ID=5920518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29135/75A Expired GB1519971A (en) | 1974-07-13 | 1975-07-10 | Acoustic recieiver for underground strata exploration |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5152884A (en) |
FR (1) | FR2278085A1 (en) |
GB (1) | GB1519971A (en) |
ZA (1) | ZA754473B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1804084A1 (en) * | 2005-12-30 | 2007-07-04 | Integrated Dynamics Engineering GmbH | Electromagnetically shielded seismometer unit with geophon |
JP2013127180A (en) * | 2011-12-19 | 2013-06-27 | Nishimatsu Constr Co Ltd | Bedrock property predicting method and system |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HU182124B (en) * | 1980-04-17 | 1983-12-28 | Mecseki Szenbanyak | Method for required influencing the changing of state of given geological system resulted or resultable in consequence of mining activity |
JPH0728026U (en) * | 1993-10-28 | 1995-05-23 | 貨泉プラスチック株式会社 | container |
JP6687235B2 (en) * | 2015-03-10 | 2020-04-22 | 日本電気株式会社 | Detection device and detection method |
JP2016166838A (en) * | 2015-03-10 | 2016-09-15 | 日本電気株式会社 | Detector and detection method |
-
1975
- 1975-07-09 JP JP50083610A patent/JPS5152884A/ja active Pending
- 1975-07-10 GB GB29135/75A patent/GB1519971A/en not_active Expired
- 1975-07-11 ZA ZA00754473A patent/ZA754473B/en unknown
- 1975-07-11 FR FR7521885A patent/FR2278085A1/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1804084A1 (en) * | 2005-12-30 | 2007-07-04 | Integrated Dynamics Engineering GmbH | Electromagnetically shielded seismometer unit with geophon |
JP2013127180A (en) * | 2011-12-19 | 2013-06-27 | Nishimatsu Constr Co Ltd | Bedrock property predicting method and system |
Also Published As
Publication number | Publication date |
---|---|
FR2278085A1 (en) | 1976-02-06 |
JPS5152884A (en) | 1976-05-10 |
ZA754473B (en) | 1976-07-28 |
DE2433793B2 (en) | 1976-08-05 |
DE2433793A1 (en) | 1976-01-29 |
FR2278085B1 (en) | 1977-12-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |