Method for the transmission of informations and/or instructions
First Claim
1. A system for transmitting information commands to a railway vehicle travelling on a railway track, comprising:
- at least one ground station located along the railway track;
each said ground station comprising a plurality of passive transponders, electrically independent from each other and spaced apart longitudinally of the track in a predetermined sequence of spacing;
each transponder comprising passive receiving means for receiving electromagnetic oscillations and passive transmitting means electrically connected to said passive receiving means and spaced from the receiving means for retransmitting the received electromagnetic oscillations, all said passive receiving means having the same first geometric relationship to the longitudinal center plane of said railway track and all of said passive transmitting means having a second different geometric relationship to the longitudinal center plane of the track, said two relationships being symmetrical about the longitudinal center plane of said railway tack;
the system further comprising a terminal located on the railway vehicle and comprising at least one transmitter in alignment with said passive receiving means and arranged to transmit electromagnetic oscillations to the passive receiving means of the transponders, and at least one receiver in alignment with said passive transmitting means and arranged to receive the retransmitted electromagnetic oscillations from the passive transmitting means of each transponder as the receiver passes thereby;
whereby the sequence and nature of the signals transponded by said ground station as said railway vehicle travels past said ground station constitutes a code group consisting of individual digits transponded respectively by successive transponders of said ground station;
said code group having information command code meaning and communicating said meaning from said ground station to said railway vehicle; and
a decoder on said railway vehicle for decoding the information command code thus received by the receiver.
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Accused Products
Abstract
In order to transmit in a simple manner in a railway system informations from a ground station provided at the rail level to a railway vehicle, a plurality of transmitters (5) and receivers (4) are arranged one after the other in the longitudinal direction of the railway track and are used as coding elements (1,2,3) of a coding group and cooperate individually and one after the other with a code converter (9) upon the passage of a vehicle on the rails provided with a corresponding code converter (9)-like ground station. The isolated coding elements (1,2,3) comprised of transmitter (5) and receiver (4) form the parts of a resonant circuit which is synchronized with the frequency of the code converter (9) and which draws the whole energy required for its return from the transmission power of the code converter (9).
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Citations
19 Claims
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1. A system for transmitting information commands to a railway vehicle travelling on a railway track, comprising:
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at least one ground station located along the railway track; each said ground station comprising a plurality of passive transponders, electrically independent from each other and spaced apart longitudinally of the track in a predetermined sequence of spacing; each transponder comprising passive receiving means for receiving electromagnetic oscillations and passive transmitting means electrically connected to said passive receiving means and spaced from the receiving means for retransmitting the received electromagnetic oscillations, all said passive receiving means having the same first geometric relationship to the longitudinal center plane of said railway track and all of said passive transmitting means having a second different geometric relationship to the longitudinal center plane of the track, said two relationships being symmetrical about the longitudinal center plane of said railway tack; the system further comprising a terminal located on the railway vehicle and comprising at least one transmitter in alignment with said passive receiving means and arranged to transmit electromagnetic oscillations to the passive receiving means of the transponders, and at least one receiver in alignment with said passive transmitting means and arranged to receive the retransmitted electromagnetic oscillations from the passive transmitting means of each transponder as the receiver passes thereby; whereby the sequence and nature of the signals transponded by said ground station as said railway vehicle travels past said ground station constitutes a code group consisting of individual digits transponded respectively by successive transponders of said ground station; said code group having information command code meaning and communicating said meaning from said ground station to said railway vehicle; and a decoder on said railway vehicle for decoding the information command code thus received by the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for transmitting information commands to a railway vehicle travelling on a railway tack, comprising at least one ground station located along the railway track;
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each said ground station comprising a plurality of passive transponders, electrically independent from each other and spaced apart longitudinally of the track in a predetermined sequence of spacing; each transponder comprising passive receiving means for receiving electromagnetic oscillations and passive transmitting means electrically connected to and spaced from the receiving means for retransmitting the received electromagnetic oscillations, all said passive receiving means having the same first geometric relationship to the longitudinal center plane of said railway track and all of said passive transmitting means having a second different geometric relationship to the longitudinal center plane of the track, said two relationships being symmetrical about the longitudinal center plane of said railway track; at least one of the transponders further including alternating means for selectively altering the received electromagnetic oscillations prior to retransmission; the system further comprising a terminal located on the railway vehicle and comprising at least one transmitter in alignment with said passive receiving means and arranged to transmit electromagnetic oscillations to the passive receiving means of the transponders, and at least one receiver in alignment with said passive transmitting means and arranged to receive the retransmitted electromagnetic oscillations from the passive transmitting means of each transponder as the receiver passes thereby; whereby the sequence and nature of the signals transponded by said ground station as said railway vehicle travels past said ground station constitutes a code group consisting of individual digits transponded respectively by successive transponders of said ground station; said code group having information command code meaning and communicating said meaning from said ground station to said railway vehicle; discriminating means on said railway vehicle for discriminating whether or not the retransmitted electromagnetic oscillations received by the receiver have been altered with respect to the electromagnetic oscillations transmitted by the transmitter; and a decoder on said railway vehicle to decode the thus altered or unaltered retransmitted code. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification