Device for the sequential transmission of signals by radio or by cable, between a central control system and data acquisition apparatuses
First Claim
1. A device for successively effecting the sequential transmission of signals selectively by radio and selectively by cable between a central control and data recording system and a plurality of data acquisition apparatuses placed at different locations, the transmission system comprising:
- radio transmission and reception means in said central control and recording system, and in said data acquisition apparatuses;
at least one transmission cable for connecting the control and recording system and the data acquisition apparatuses which system and apparatuses are provided with detachable connectors for the transmission cable, means for neutralizng the radio transmission and reception means in each of said acquisition apparatus when the connection of the latter by cable is established, said neutralizing means comprising a first switch controlled by a relay receiving its control electric voltage through a conducting connection created by assembling of said connectors, actuation of said relay interrupting the electric supply of said radio transmission and reception means associated to said acquisition apparatus;
wherein the control and recording system comprises a generator of modulated control signals and connection means for transmitting the control signals to radio transmission means associated with the control and recording system and with the transmission calbe when the latter is connected, said cable interconnecting in series a plurality of resistors, each acquisition apparatus including a demodulator for sensing the electric voltage across each of said resistors.
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Accused Products
Abstract
Device for the sequential transmission of signals by radio or by cable between a central control and recording station and local data acquisition apparatuses, comprising cables connecting said data acquisition apparatuses to the central station and radio transmission and reception means associated with each acquisition apparatus and with the central station, and switching means for establishing the cable connection and interrupting the radio connection between the central station and any particular apparatus for which said radio connection becomes defective as a result of obstacles on the path between the location of said apparatus and that of the central station.
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Citations
14 Claims
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1. A device for successively effecting the sequential transmission of signals selectively by radio and selectively by cable between a central control and data recording system and a plurality of data acquisition apparatuses placed at different locations, the transmission system comprising:
- radio transmission and reception means in said central control and recording system, and in said data acquisition apparatuses;
at least one transmission cable for connecting the control and recording system and the data acquisition apparatuses which system and apparatuses are provided with detachable connectors for the transmission cable, means for neutralizng the radio transmission and reception means in each of said acquisition apparatus when the connection of the latter by cable is established, said neutralizing means comprising a first switch controlled by a relay receiving its control electric voltage through a conducting connection created by assembling of said connectors, actuation of said relay interrupting the electric supply of said radio transmission and reception means associated to said acquisition apparatus;
wherein the control and recording system comprises a generator of modulated control signals and connection means for transmitting the control signals to radio transmission means associated with the control and recording system and with the transmission calbe when the latter is connected, said cable interconnecting in series a plurality of resistors, each acquisition apparatus including a demodulator for sensing the electric voltage across each of said resistors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- radio transmission and reception means in said central control and recording system, and in said data acquisition apparatuses;
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10. A seimic transmission system for transmission of signals selectively by radio and selectively by a cable having first and second lines, the signals being transmitted between a central control and data recording assembly and a plurality of data acquisition apparatuses disposed at different locations and provided with means for memorizing seismic data, the transmission system comprising:
- radio transmission and reception means associated with the central control and recording assembly and with the data acquisition apparatuses, wherein said central control and data recording assembly is provided with inputs and outputs for a transmission cable, and wherein said central control and data recording assembly includes a means for generating coded control signals;
a means for transmission of said control signals to outputs for said cable and to said radio transmission means in said assembly;
a means in said assembly for sensing control signals and data from said data acquisition apparatuses on inputs for said cable and on radio reception means, and means for directing signals recived on said inputs or by said radio reception means to a recording means;
wherein each of said data acquisition apparatuses is provided with terminals for said transmission cable and means for neutralizing the radio transmission and reception means in said data acquisition apparatus when the transmission cable is connected to said terminals said systems further including;
a detachable connector for connecting each of said data acquisition apparatuses to the cable which includes at least first and second lines, the first line interconnecting in series a plurality of resistors, each of said data acquisition apparatuses comprising a demodulator for sensing electric voltage across each of said resistors, said neutralizing means in each of said data acquisition apparatuses comprising a first switch actuated by engagement of said connector for interrupting the electric supply of said radio transmission and reception means. - View Dependent Claims (11, 12, 13, 14)
- radio transmission and reception means associated with the central control and recording assembly and with the data acquisition apparatuses, wherein said central control and data recording assembly is provided with inputs and outputs for a transmission cable, and wherein said central control and data recording assembly includes a means for generating coded control signals;
Specification