GB1295332A - - Google Patents
Info
- Publication number
- GB1295332A GB1295332A GB1295332DA GB1295332A GB 1295332 A GB1295332 A GB 1295332A GB 1295332D A GB1295332D A GB 1295332DA GB 1295332 A GB1295332 A GB 1295332A
- Authority
- GB
- United Kingdom
- Prior art keywords
- generator
- line
- code
- pulses
- assemblage
- 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
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/22—Transmitting seismic signals to recording or processing apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Acoustics & Sound (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Burglar Alarm Systems (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Small-Scale Networks (AREA)
Abstract
1295332 Selective signalling COMPAGNIE GENERALE DE GEOPHYSIQUE 27 Feb 1970 [5 March 1969 9 Feb 1970] 9712/70 Heading G4H [Also in Division H4] The outputs of a geophone array are timemultiplexed and applied to a single transmission line for recording at a remote point, the multiplex sampling being controlled by pulses sent along the line. In the embodiment shown, geophones C are coupled to transmission line 1 by respective assemblages A<SP>1</SP> detailed in Fig. 7. Line 1 is terminated by a pulse generator G and remote digital recording unit E. Each geophone output is fed to line 1 via a noise-reduction filter 31, FET gate 32 and impedance matcher 33 With the apparatus in a recording mode, all geophone outputs are scanned within a 2 msec. period by sequential opening of the gates 32, each particular gate being opened in response to recognition by assemblage A<SP>1</SP> of an address code identifying its position along line 1. In this example, generator G produces a pulse train and coincidence circuit 42 opens gate 32 when the number of pulses in the train reaches a number stored in counter 35. Prior to the recording mode, the apparatus operates in an addressing mode during which the counters 35 store different numbers, constituting the address codes, as follows. Recording unit E sends along line 1 a pulse code signifying "start addressing"; this code is recognized by units 68 which open gates 41 to pass clock pulses from high frequency sources 40 to counters 35; the code is also received by generator G which transmits in response an "end addressing" code; the "end addressing" code is recognized by units 39 which then close gates 41; thus gates 41 are open for periods respectively proportional to the line transmission times between generator G and the different assemblages A<SP>1</SP> and hence t he numbers stored at 35 identify the assemblage positions along line 1. In an alternative embodiment (Fig. 3, not shown) which does not have the prior addressing mode, units 35, 38, 39, 40, 41, 42 of assemblage A<SP>1</SP> are replaced by a counter with a pre-wired output decoder arranged to open gate 32 when a pre-determined count of the pulses in the train from generator G is reached. This counter is reset to zero (or to a present count if it is not desired to sample all the geophone outputs) at the beginning of each 2 msec. sampling period in response to recognition by the assemblage of a synch. signal. In a modification of the Fig. 3 embodiment generator G produces 8-bit address codes instead of single pulses, and the counter is replaced by an address decoder. Details of the synch. signal recognition circuit are given (Fig. 4, not shown).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6906077A FR2036151A5 (en) | 1969-03-05 | 1969-03-05 | |
FR7004447A FR2079654A6 (en) | 1970-02-09 | 1970-02-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1295332A true GB1295332A (en) | 1972-11-08 |
Family
ID=26214883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1295332D Expired GB1295332A (en) | 1969-03-05 | 1970-02-27 |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5219095B1 (en) |
BR (1) | BR7017214D0 (en) |
CS (1) | CS162751B2 (en) |
DE (1) | DE2010522C3 (en) |
EG (1) | EG10020A (en) |
ES (1) | ES377076A1 (en) |
GB (1) | GB1295332A (en) |
NL (1) | NL169923C (en) |
OA (1) | OA03220A (en) |
PL (1) | PL72670B1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151358A (en) * | 1983-12-09 | 1985-07-17 | Nat Nuclear Corp Ltd | Multiplexed control of ultrasonic transducers |
GB2156556A (en) * | 1984-03-23 | 1985-10-09 | Philips Electronic Associated | Electrical circuit unit and circuit arrangement including a plurality of such units |
GB2173330A (en) * | 1985-03-29 | 1986-10-08 | Seprol Limited | Monitoring system |
GB2203578A (en) * | 1987-04-10 | 1988-10-19 | Nittan Co Ltd | Information monitoring control system |
US4849752A (en) * | 1985-09-27 | 1989-07-18 | U. S. Philips Corporation | Method and apparatus for circuit units |
WO2001051957A1 (en) * | 2000-01-11 | 2001-07-19 | Input/Output, Inc. | Two-conductor bidirectional digital seismic telemetry interface |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2237552A5 (en) * | 1973-07-10 | 1975-02-07 | Sercel Rech Const Elect | |
DE2529475C3 (en) * | 1975-07-02 | 1981-10-08 | Ewald Max Christian Dipl.-Phys. 6000 Frankfurt Hennig | Electrical circuit arrangement for time-dependent measurement of physical quantities |
DE2729085C2 (en) * | 1976-06-28 | 1986-09-18 | Chevron Research Co., San Francisco, Calif. | Geophone chain connection |
DE3132932A1 (en) * | 1981-08-20 | 1983-03-10 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Arrangement for magnetic measurement of magnetisable objects |
DE3304742A1 (en) * | 1983-02-11 | 1984-08-16 | Paul 5940 Lennestadt Schmidt | Method for determining geopathogenic zones |
DE19507177A1 (en) * | 1995-03-02 | 1996-09-05 | Daimler Benz Ag | Locally induced component condition alteration measurement appts. for e.g. piezo sensor |
-
1970
- 1970-02-18 PL PL1970138861A patent/PL72670B1/en unknown
- 1970-02-20 OA OA53854A patent/OA03220A/en unknown
- 1970-02-21 ES ES70377076A patent/ES377076A1/en not_active Expired
- 1970-02-24 EG EG72/70A patent/EG10020A/en active
- 1970-02-27 GB GB1295332D patent/GB1295332A/en not_active Expired
- 1970-03-04 BR BR217214/70A patent/BR7017214D0/en unknown
- 1970-03-04 NL NLAANVRAGE7003099,A patent/NL169923C/en not_active IP Right Cessation
- 1970-03-05 DE DE2010522A patent/DE2010522C3/en not_active Expired
- 1970-03-05 JP JP45018370A patent/JPS5219095B1/ja active Pending
- 1970-03-05 CS CS1497A patent/CS162751B2/cs unknown
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151358A (en) * | 1983-12-09 | 1985-07-17 | Nat Nuclear Corp Ltd | Multiplexed control of ultrasonic transducers |
GB2156556A (en) * | 1984-03-23 | 1985-10-09 | Philips Electronic Associated | Electrical circuit unit and circuit arrangement including a plurality of such units |
GB2173330A (en) * | 1985-03-29 | 1986-10-08 | Seprol Limited | Monitoring system |
US4849752A (en) * | 1985-09-27 | 1989-07-18 | U. S. Philips Corporation | Method and apparatus for circuit units |
GB2203578A (en) * | 1987-04-10 | 1988-10-19 | Nittan Co Ltd | Information monitoring control system |
GB2203578B (en) * | 1987-04-10 | 1991-07-10 | Nittan Co Ltd | Information monitoring control system |
WO2001051957A1 (en) * | 2000-01-11 | 2001-07-19 | Input/Output, Inc. | Two-conductor bidirectional digital seismic telemetry interface |
US6529443B2 (en) | 2000-01-11 | 2003-03-04 | Input/Output, Inc. | Two-conductor bidirectional digital seismic telemetry interface |
Also Published As
Publication number | Publication date |
---|---|
NL169923B (en) | 1982-04-01 |
JPS5219095B1 (en) | 1977-05-26 |
DE2010522B2 (en) | 1974-05-09 |
ES377076A1 (en) | 1972-11-01 |
DE2010522A1 (en) | 1970-11-12 |
NL169923C (en) | 1982-09-01 |
CS162751B2 (en) | 1975-07-15 |
OA03220A (en) | 1970-12-15 |
BR7017214D0 (en) | 1973-01-04 |
EG10020A (en) | 1976-08-31 |
NL7003099A (en) | 1970-09-08 |
DE2010522C3 (en) | 1974-12-05 |
PL72670B1 (en) | 1974-08-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |