US3911226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installation for multiplex transmission of digital signals
Assignee: CGG SA
•
Filing: 1973-05-18
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Granted: 1975-10-07
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Expires: 1993-05-18
Abstract
Abstract A plurality of digital detectors (e.g. of seismic vibrations) provide and store digital signals representative of samples of a detected quantity. The detectors are connected in series by a transmission path having a pulse generator at one end and a recording unit at the opposite end. First pulse signals are generated at a multiplexing cycle frequency by the pulse generator. The digital detectors include means for recognising a first pulse signal, means for suppressing or at least altering the recognised first pulse signal before relaying it to the next digital detector and means responsive to the recognised first pulse signal for applying the stored digital signal to the transmission path followed by a new first pulse signal. The next digital detector relays the digital signal(s) of the previous digital detector(s), recognises the new first pulse signal at the end of the said digital signal(s) and adds its own digital signal to the succession of digital signals followed by another new first pulse signal. In this way a multiplexed succession of digital signals from the plurality of detectors is built up and then stored at the recording unit.
Inventors
- 👤 Philippe Angelle
- 👤 Jean-Claude Naudot
- 👤 Maurice Hythier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:30
CPC Classifications
G; G08; G08C; G08C15/00; G08C15/06; G08C15/12; G01; G01V; G01V1/00; G01V1/22
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
216 words
Installation for the multiplex transmission of seismic signals delivered by a plurality of sensors comprising a transmission path having one end connected to a generator of first pulse signals and the other end connected to a recording unit, each sensor being coupled to the path by means of a multiplexing circuit connected in series with the path, characterized in that the generator provides a short first pulse signal at the beginning of each multiplexing cycle, that each sensor provides in digital form the detected information and that each multiplexing circuit comprises at least one shift register capable of being loaded with the digital information from said sensor and of being operatively coupled to the downstream side of the transmission path in order to apply the digital information thereto in the form of a succession of encoded pulses, the multiplexing circuit also having first pulse signal detector means coupled to the upstream side of the transmission path and means for applying clock pulses to the shift register after the detection of the first pulse signal, said means for applying clock pulses to the shift register comprising a source of clock pulses and means responsive to the detection of the first pulse signal to apply a predetermined number of clock pulses from the source to the shift register.
Claim 2
Dependent Claim
216 words
Installation for the multiplex transmission of seismic signals delivered by a plurality of sensors comprising a transmission path having one end connected to a generator of first pulse signals and the other end connected to a recording unit, each sensor being coupled to the path by means of a multiplexing circuit connected in series with the path, characterized in that the generator provides a short first pulse signal at the beginning of each multiplexing cycle, that each sensor provides in digital form the detected information and that each multiplexing circuit comprises at least one shift register capable of being loaded with the digital information from said sensor and of being operatively coupled to the downstream side of the transmission path in order to apply the digital information thereto in the form of a succession of encoded pulses, the multiplexing circuit also having first pulse signal detector means coupled to the upstream side of the transmission path and means for applying clock pulses to the shift register after the detection of the first pulse signal, said means for applying clock pulses to the shift register comprising a source of clock pulses and means responsive to the detection of the first pulse signal to apply a predetermined number of clock pulses from the source to the shift register.
Claim 3
Dependent Claim
58 words
Installation for multiplex transmission according to claim 1 characterised in that each multiplexing circuit comprises, as an element in series with the transmission path, means for suppressing at least a part of the first pulse signal, and means for re-applying a first pulse signal to the path after the application of clock pulses to its own shift register.
Claim 4
Dependent Claim
229 words
Installation for the multiplex transmission of signals delivered by a plurality of sensors, comprising a transmission path having one end connected to a generator of first pulse signals and the other end connected to a recording unit, each sensor being coupled to the path by means of a multiplexing circuit connected in series with the path characterised in that each sensor is adapted to provide in digital form the detected information and that each multiplexing circuit comprises a. at least one shift register capable of being loaded with the digital information from said sensor and of being operatively coupled to the downstream side of the transmission path in order to apply the digital information thereto in the form of a succession of encoded pulses, b. first pulse signal detector means coupled to the upstream side of the transmission path, c. means for applying clock pulses to the shift register after the detection of the first pulse signal, and d. means for suppressing at least a part of the first pulse signal and placed in series with the transmission path; the first pulse signals comprising pulses of one or other polarity while the digital information signals comprise pulses of a single polarity, and the means adapted to suppress at least a part of the first pulse signals comprising a diode mounted to conduct for the polarity of the digital information.
Claim 5
Dependent Claim
229 words
Installation for the multiplex transmission of signals delivered by a plurality of sensors, comprising a transmission path having one end connected to a generator of first pulse signals and the other end connected to a recording unit, each sensor being coupled to the path by means of a multiplexing circuit connected in series with the path characterised in that each sensor is adapted to provide in digital form the detected information and that each multiplexing circuit comprises a. at least one shift register capable of being loaded with the digital information from said sensor and of being operatively coupled to the downstream side of the transmission path in order to apply the digital information thereto in the form of a succession of encoded pulses, b. first pulse signal detector means coupled to the upstream side of the transmission path, c. means for applying clock pulses to the shift register after the detection of the first pulse signal, and d. means for suppressing at least a part of the first pulse signal and placed in series with the transmission path; the first pulse signals comprising pulses of one or other polarity while the digital information signals comprise pulses of a single polarity, and the means adapted to suppress at least a part of the first pulse signals comprising a diode mounted to conduct for the polarity of the digital information.
Claim 6
Dependent Claim
37 words
Installation for multiplex transmission according to claim 3 characterised in that each multiplexing circuit further includes means for re-applying a first pulse signal to the path after the application of clock pulses to its own shift register.
Claim 7
Dependent Claim
208 words
Installation for the multiplex transmission of signals delivered by a plurality of sensors comprising a transmission path having one end connected to a generator of first pulse signals and the other end connected to a recording unit, each sensor being coupled to the path by means of a multiplexing circuit connected in series with the path, characterised in that each sensor provides in digital form the detected information and that each multiplexing circuit comprises: a. at least one shift register capable of being loaded with the digital information from said sensor and of being operatively coupled to the downstream side of the transmission path in order to apply the digital information thereto in the form of a succession of encoded pulses, b. first pulse signal detector means coupled to the upstream side of the transmission path, c. means for applying clock pulses to the shift register after the detection of the first pulse signal, d. a multiplex memory to register the detection of a first pulse signal, and e. means for authorizing temporarily such registration of the detection of a first pulse signal, wherein the means adapted to apply clock pulses to the shift register is responsive to the registration of the detection of a first pulse signal.
Claim 8
Dependent Claim
208 words
Installation for the multiplex transmission of signals delivered by a plurality of sensors comprising a transmission path having one end connected to a generator of first pulse signals and the other end connected to a recording unit, each sensor being coupled to the path by means of a multiplexing circuit connected in series with the path, characterised in that each sensor provides in digital form the detected information and that each multiplexing circuit comprises: a. at least one shift register capable of being loaded with the digital information from said sensor and of being operatively coupled to the downstream side of the transmission path in order to apply the digital information thereto in the form of a succession of encoded pulses, b. first pulse signal detector means coupled to the upstream side of the transmission path, c. means for applying clock pulses to the shift register after the detection of the first pulse signal, d. a multiplex memory to register the detection of a first pulse signal, and e. means for authorizing temporarily such registration of the detection of a first pulse signal, wherein the means adapted to apply clock pulses to the shift register is responsive to the registration of the detection of a first pulse signal.
Claim 9
Dependent Claim
37 words
Installation for multiplex transmission according to claim 5 characterised in that each multiplexing circuit further includes as an element in series with the transmission path means for suppressing at least a part of the first pulse signal.
Claim 10
Dependent Claim
80 words
Installation for multiplex transmission according to claim 6 characterised in that the means for authorizing temporarily the registration of detection of a first pulse signal comprises a bistable element controlling a gate connected in series between the multiplex memory and the means for detecting the first pulse signal, the gate being controlled to conduct when the bistable is in ONE state, and means for resetting the bistable to a ZERO state in response to the output of the controlled gate.
Claim 11
Dependent Claim
79 words
Installation for multiplex transmission according to claim 7 characterised in that the generator is arranged to produce from time to time a second pulse signal A different from the first pulse signals defining the beginning of a multiplexing cycle and in that the means for authorizing temporarily the registration of the detection of a first pulse signal comprises also means for making the bistable go to the ONE state in response to the detection of the second pulse signal.
Claim 12
Dependent Claim
76 words
Installation for multiplex transmission according to claim 8 characterised in that each multiplexing circuit also comprises means for applying downstream on the transmission path another second pulse signal in place of the first pulse signal thus registered, and also means for applying downstream on the transmission path another second pulse signal after the application of clock pulses through its own shift register, the said binary cell changing state at each detection of a first pulse signal.
Claim 13
Dependent Claim
50 words
Installation for multiplex transmission according to claim 9 characterised in that the means for suppressing at least a part of the first pulse signals comprises a gate in series with the transmission path, the said gate being controlled to the blocked state while the bistable is in the ONE state.
Claim 14
Dependent Claim
96 words
Installation for multiplex transmission according to claim 9 characterised in that the generator produces a predetermined number of third pulse signals after each first pulse signal, the third pulse signals being different from the first and the second pulse signals and that in each multiplexing circuit the means for applying clock pulses to the shift register comprises a gate responsive to the registration in the memory of the detection of a first pulse signal to let pass at least a part of the third pulse signals as well as the clock pulses to the shift register.
Claim 15
Dependent Claim
52 words
Installation for multiplex transmIssion according to claim 8 characterised in that each multiplexing circuit also comprises as an element in series with the transmission path means responsive to the registration of the detection of a first pulse signal in the multiplex memory for preventing the transmission of information on the path downstream.
Claim 16
Dependent Claim
66 words
Installation for multiplex transmission according to claim 8 characterised in that the generator produces before each second pulse signal a fourth pulse signal different from the first, second and third pulse signals and in that each detector comprises an analogue to digital converter with controlled sampling and in that each multiplexing circuit comprises means for controlling the sampling at each detection of the fourth pulse signal.
Claim 17
Dependent Claim
197 words
Installation for the multiplex transmission of signals delivered by a plurality of sensors comprising a transmission path having one end connected to a generator of first pulse signals and the other end connected to a recording unit, each sensor being coupled to the path by means of multiplexing circuit connected in series with the path characterised in that each sensor provides in digital form the detected information and that each multiplexing circuit comprises: a. at least one shift register, capable of being loaded with the digital information from said sensor and of being operatively coupled to the downstream side of the transmission path in order to apply the digital information thereto in the form of a succession of encoded pulses, b. first pulse signal detector means coupled to the upstream side of the transmission path, c. means for applying clock pulses to the shift register after the detection of the first pulse signal, the generator producing from time to time a second pulse signal different from the first pulse signal, each detector comprising a digitiser with controlled sampling and each multiplexing circuit comprising also means for controlling the sampling at each detection of the second pulse signal.
Claim 18
Dependent Claim
197 words
Installation for the multiplex transmission of signals delivered by a plurality of sensors comprising a transmission path having one end connected to a generator of first pulse signals and the other end connected to a recording unit, each sensor being coupled to the path by means of multiplexing circuit connected in series with the path characterised in that each sensor provides in digital form the detected information and that each multiplexing circuit comprises: a. at least one shift register, capable of being loaded with the digital information from said sensor and of being operatively coupled to the downstream side of the transmission path in order to apply the digital information thereto in the form of a succession of encoded pulses, b. first pulse signal detector means coupled to the upstream side of the transmission path, c. means for applying clock pulses to the shift register after the detection of the first pulse signal, the generator producing from time to time a second pulse signal different from the first pulse signal, each detector comprising a digitiser with controlled sampling and each multiplexing circuit comprising also means for controlling the sampling at each detection of the second pulse signal.
Claim 19
Dependent Claim
37 words
Installation for multiplex transmission according to claim 4 characterised in that each multiplexing circuit further includes as an element in series with the transmission path, means for suppressing at least a part of the first pulse signal.
Claim 20
Dependent Claim
38 words
Installation for multiplex transmission according to claim 1 characterised in that the main generator and the central registering unit are disposed in the vicinity of each other and that the path forms a loop between these two elements.
Claim 21
Dependent Claim
25 words
Installation for multiplex transmission according to claim 16 characterised in that the two strands of the loop are found in the same cable of conductors.
Claim 22
Dependent Claim
45 words
Installation for multiplex transmission according to claim 17 characterised in that the assemblies associated with the said cable are assemblies having two sections, a first section for connecting a detector to one strand of the path and a second section comprising a simple electric connection.
Claim 23
Dependent Claim
27 words
Installation for multiplex transmission according to claim 18 characterised in that the connection between two section assemblies is made by connecting elements each having two crossed conductors.
Claim 24
Dependent Claim
31 words
Installation for multiplex transmission according to claim 19 characterised in that the connection means are connected to the assemblies by connection systems which differ from one element to an adjacent element.
Claim 25
Dependent Claim
38 words
Installation for multiplex transmission according to claim 3 characterised in that the main generator and the central registering unit are disposed in the vicinity of each other and that the path forms a loop between these two elements.
Claim 26
Dependent Claim
25 words
Installation for multiplex transmission according to claim 21 characterised in that the two strands of the loop are found in the same cable of conductors.
Claim 27
Dependent Claim
45 words
Installation for multiplex transmission according to claim 22 characterised in that the assemblies associated with the said cable are assemblies having two sections a first section for connecting a detector to one strand of the path and a Second section comprising a simple electric connection.
Claim 28
Dependent Claim
27 words
Installation for multiplex transmission according to claim 23 characterised in that the connection between two section assemblies is made by connecting elements each having two crossed conductors.
Claim 29
Dependent Claim
31 words
Installation for multiplex transmission according to claim 24 characterised in that the connection means are connected to the assemblies by connection systems which differ from one element to an adjacent element.
Claim 30
Dependent Claim
18 words
Installation for multiplex transmission according to claim 3 characterised in that the sensors are responsive to seismic vibrations.
Claim 31
Dependent Claim
38 words
Installation for multiplex transmission according to claim 5 characterised in that the main generator and the central registering unit are disposed in the vicinity of each other and that the path forms a loop between these two elements.
Claim 32
Dependent Claim
25 words
Installation for multiplex transmission according to claim 27 characterised in that the two strands of the loop are found in the same cable of conductors.
Claim 33
Dependent Claim
44 words
Installation for multiplex transmission according to claim 28 characterised in that the assemblies associated with the said cable are assemblies having two sections, a first section for connecting a detector to one strand of the path and a second section comprising simple electric connection.
Claim 34
Dependent Claim
27 words
Installation for multiplex transmission according to claim 29 characterised in that the transmission between two section assemblies is made by connecting elements each having two crossed conductors.
Claim 35
Dependent Claim
31 words
Installation for multiplex transmission according to claim 30 characterised in that the connection means are connected to the assemblies by connection systems which differ from one element to an adjacent element.
Claim 36
Dependent Claim
18 words
Installation for multiplex transmissions according to claim 5 characterised in that the sensors are responsive to seismic vibrations.
References Cited (Backward Citations)
US3586782A
Cited
US3752932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |