DE2210949A1 - Transmission, signaling and communication system for rail traffic - Google Patents

Description

DR. MOLLER-DONS DR. MANlTZ - DRI. DEUFa ,. DIPL-ING. RMSTEFtWALD ■ DIFL .- !!! ^. G3ÄMKu ■■ * "

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CABLES DE LYON ALSACIENNE-GEOFFROY.DELORE 170, avenue Jean Jaures, 69 - LYON (Rho * ne), France

TRANSMISSION, SIGNALING AND MESSAGE SYSTEM FOR RAILWAY TRANSPORT

The invention relates to a transmission system to ensure signaling, monitoring and security rail transport, and more generally the exchange of information between the railway line and those on it running trains.

Such systems are known which comprise two cables laid parallel to the railway line, from each of which consists of an insulated conductor. A current flowing in such a conductor generates around it a magnetic field that is picked up by a receiver attached to the locomotive. At certain intervals along the route, the two cables are arranged crosswise so that at these crossing points the in the The magnetic fields generated by the two conductors are the same size and opposed to each other, which means that the locomotive at the Passing over the relevant positions received, resulting

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Magnetic field is zero. The number of zero crossings from ' The start of the route is stored in a counter housed in the locomotive, so that the locomotive driver because of the distances between the intersection points, it knows at any point in time how far it is from the starting point the route is located.

It is also known that for the sake of

Transfer stability shields the conductors of such cables Need to become; A shield, however, prevents the transmission of the magnetic field, so the shield to both Sides of the crossing point of the cables must be interrupted for a short distance so that the recorder can use the Locomotive can receive the information that at the relevant crossing points the zero crossing through the magnetic field took place.

This metal shield is usually in turn surrounded by a protective insulating layer.

In this transmission system, the two conductors are tubular and contain one or more additional lines for the transmission of telecommunication currents high frequency can be used along the route. The tubular signaling conductor can also be used as a conductor or Shielding of the additional communication lines contained in it to serve.

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With the system according to the invention, both the signaling magnetic fields at the crossing points and along the route the reporting flows without the presence of Auxiliary ladders are transferred.

The system according to the invention is thereby

marked that the message flows between the head of the Signal cable and its screen flow and that the continuity of the latter for the reporting current frequencies with the help of high passports restoring the sections of shielding on either side of the breakpoints with each other associate.

This arrangement can be made on one or preferably on both cables of the transmission line.

The inventor found that as a filter simple capacitors can be used

The drawing illustrates, for example, part of a transmission system according to the invention line used,

This line consists in a known manner

two cables A and B, each of which consists of a conductor 1 or 1 »covered with an insulation 2 and 2 *, a shield 3 and 3 ^f and an insulating jacket 4, 4 ^f .

After that, sections A1 and A2, as well as B1 and B2 etc. of the two cables are over at certain intervals

209839/0808 ^{m /} '

Arranged cross and their shields 3 and 3 * respectively closed both sides of the crossing point also interrupted in a known manner; the shields 3 and 3 * of the two in parallel Running cable sections like A1B1 and A2B2 are on each Crossing point connected to one another by a conductor 5 that applies the same potential

According to the invention, the screen 3 of the section A1 is connected to the screen of the adjacent via a capacitor 6 Section A2 of the same cable connected; it is the same with every other crossing point.

Advantageously, the screen is 3 * of the section B1 connected via a capacitor 7 to the screen of the adjacent section B2 of the same cable; this is also the case at the other crossing points.

Despite the interrupted shielding, the two coaxial lines ensure the transmission of the sound and carrier frequency currents.

Each of these coaxial lines can under one

metallic outer shielding, provided that the shield itself is at the intersection of the two Lines is interrupted.

Both lines are preferably laid symmetrically to the line axis.

-Patent claims- 209839/0808

Claims (4)

PATENT CLAIMS υ 1 J Transmission, signaling and communication system for rail traffic, consisting of two cables laid parallel to the route, each consisting of a conductor through which a signal current flows, insulated and surrounded by a screen, which are arranged crosswise at certain intervals and which are crossed Shields are interrupted at the crossing points, a connection being established between the shielding sections in such a way that they form an auxiliary line which can be used to transmit the signaling currents with the insulated conductor of the cable, characterized in that the connection consists of the high passes (6, 7) and that the reporting streams have a frequency that exceeds the frequency of the signal stream » 2. Transmission system according to claim 1, characterized in that the high-pass filters (6,7) are designed as capacitors. 3 transmission system according to claim 1, characterized in that the shielded cable ^{lies under a second shield (3 1} ) which is interrupted at the cable crossing points, 4. Transmission system according to claim 1, characterized in that the two Cables are laid symmetrically to the line axis. 209839/0808 Blank page