JPS58105872A - Transmission system of car control signal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system for transmitting vehicle control signals in an uninsulated railway track circuit.

In railways, control signals are sent to track circuits in order to command trains and other vehicles to proceed and stop. Conventionally, in uninsulated track circuits using uninsulated rails, the The transmission method shown in FIG. 2 is generally adopted.

That is, in Fig. 1, a transmitter TX is connected via a transformer T to a transmission point A of an uninsulated track circuit composed of uninsulated rails R1 and RB, and a carrier wave of the same frequency is used. A proceeding signal and a stop signal are being transmitted, but if the preceding vehicle PT is near the front side of the transmitting point A, even if the stop signal S-R is transmitted to the following vehicle FT, the axle of the preceding vehicle PT As a result, the stop signal SR is short-circuited, which consumes most of the power, so that the signal level of the stop signal SR for the continuing vehicle FT decreases,
There is a drawback that the stop signal SR cannot be received well by the continuing vehicle FT.

Fig. 2 addresses the shortcomings of Fig. 1, and extends from the transmission point A to the point B, which is several 10 meters behind, with extension lines Ll, LB.
are spread out on rails R1 and R11, and their terminals are connected to rails Ri and Rg in a cross-like manner at point B,
At the transmission point A, the extension lines Ll, Ll are connected via the transformer T.
Between transmission point A and point B, vehicle T receives signals from extension lines Li and Li, while for the rear of point B , rails Rz and R2.

However, in this case, the progress signal S
When the rearmost part of vehicle T approaches transmission point A while transmitting G, the effect of the axle short circuit on point B decreases, and the proceeding signal So that should be consumed due to the axle short circuit of vehicle T moves backward from point B. When a vehicle also flows out and there is a vehicle to continue, the proceeding signal S is also activated for this vehicle.

The vehicle continues to move forward and transmits, I
i! ii. There is a risk of a rear-end collision with a vehicle T that is stopped between A and B.

The present invention has the purpose of fundamentally eliminating such drawbacks of the conventional method, and provides alternative means for transmitting a go signal and a stop signal, each having a separate frequency, from a first transmission point in an uninsulated track circuit. This invention provides a highly effective vehicle control signal transmission system in which only the stop IT signal is transmitted from a second transmission point provided on the rear side of the waterfall 1 transmission point. be.

Hereinafter, the present invention will be explained in detail with reference to FIG. 3 and subsequent figures showing embodiments.

In the configuration diagram of FIG. 3, a forward IS signal fo and a stop signal fR, each having a separate frequency, are used.
From the first transmission point A in the uninsulated track circuit r (consisting of uninsulated rails R1, Ri+), a progress signal is transmitted by the transmitter 'TI' While fO and stop signal fR are alternatively transmitted, signals are transmitted from a one- and three-turn transformer Tn via a cable from a second transmission point C provided on the rear side in the direction of travel of the vehicle T with respect to transmission point A. The transformer TBo connected to , a stop signal f from the transmitter TX
There is a growing demand for transmitting only n.

Note that FIG. 4 shows an example of the change characteristic of the impedance Z with respect to the frequency f of the circuit network N. As is clear from the figure, the stop signal fR easily passes through the circuit network N, but the progress signal fQ does not pass through the circuit network. The configuration of the circuit network N is determined on the assumption that the signal does not pass through N.

Therefore, if the progress signal fG is transmitted as shown in FIG. 3 (5), it will be transmitted only from the transmission point A, and the vehicle T
The progress signal ro from the transmission point A can be received well, and due to the short circuit of the axle of the vehicle T, the progress signal fG to the rear is unnecessary.
I'll stop.

Regarding Kone, as shown in the same figure (c), when the preceding vehicle PT is near the transmitting point A Cl') Aif side, if the stop signal fR for the continuing vehicle FT is transmitted, the same signal f
17. is transmitted from transmission points A and C, and even if the floating one word fR from transmission point A is notified by the preceding vehicle PT, in response to the stop signal f it from transmission point C, the preceding vehicle Vehicle 1: Since the axle short circuit effect of the speed PT does not apply and the signal is transmitted as a normal signal level, the stop signal fR from the transmission point C can be received satisfactorily in the continuing vehicle 11 FT.

Therefore, even if the leading vehicle (pT) exists near the transmission point A, the stop signal fR from the transmission point C will be transmitted normally to the rear, and the continuing vehicle FT will receive the stop control properly and stop. Stop.

Alternatively, a tear wave device or a wave trap may be used as the circuit network N, and instead of the three-turn transformer TIM B, a
The same effect can be achieved even if the transformer shown in Figure 1 is used, or if a low resistance branch circuit is used.Also, for the purpose of stopping the heavy current, a capacitor is inserted between the three-turn transformer Ta and each transmission point A, C7. The present invention can be modified in various ways.

As is clear from the above description, the present invention prevents unnecessary leakage of the proceeding signal and reliably transmits the stop signal, so it exhibits remarkable effects in non-insulated track circuits for various uses.

[Brief explanation of the drawing]

FIGS. 1 and 2 are block diagrams of a conventional example, FIG. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a diagram showing an example of the characteristics of the circuit network in FIG. 3. B, I R2...φ non-insulated rail, A-...轡first transmission point, C...Hibiki second transmission point, Ta...three-turn transformer (branch circuit), TX... ...Transmitter, N--Yu circuit network, fo...Progress signal, fu...Stop signal.

Claims (1)

[Claims] A go signal and a stop signal each having an individual frequency are selectively transmitted from a first transmission point in the non-insulated track circuit via a branch circuit, and a second transmission point provided on the rear side of the first transmission point is provided. A vehicle control signal transmission method, characterized in that the stop signal is transmitted from a transmission point through a circuit network that exhibits high impedance to the traveling signal and low impedance to the stop signal;