JP5005289B2 - Track circuit - Google Patents

Description

  The present invention relates to a track circuit for detecting a train position, and more particularly to a technique for increasing the output efficiency of a transmitter.

In general, the track circuit is treated as an electric circuit. The track circuit includes a transformer, a rail, and a cable, and has a reactance component and a susceptance component. Train detection in the track circuit system is carried out by transmitting a train detection signal from a transmitter to a track circuit equivalent to this electric circuit and receiving the train detection signal at a receiver via the track circuit ( Patent Document 1). Moreover, the train control in the track circuit system performs the train control by receiving a train control signal from a signal current flowing through the rail in the track circuit by an electromagnetic induction phenomenon in a pickup coil installed on the vehicle. For this reason, the train detection signal and the train control signal require received power sufficient to ensure the train detection performance and the train control performance, and therefore output power sufficient to ensure the performance.
JP 2005-178614 A

  When an AC signal is transmitted from the transmitter, the absolute value of the phase difference between the output voltage and output current of the transmitter may be large due to the reactance component and susceptance component of the track circuit and cable. In that case, most of the output signals are reactive power, and as a result, it is difficult to ensure train detection performance and train control performance in track circuits with long rails, track circuits with long cables, and track circuits with low signal transmission performance. There was a problem that there was.

  In the prior art, if the phase difference between the output voltage and output current of the transmitter is large, increase the output of the transmitter, or shorten the rail length in the track circuit, or shorten the cable length in the track circuit, It was necessary to ensure train detection performance and train control performance.

  It is an object of the present invention to provide efficient signal transmission by minimizing reactive power by minimizing the phase difference between the output voltage and output current of a transmitter in a track circuit and maximizing active power. It is in.

  In order to achieve the above object, the present invention includes a phase adjuster between the transmitter and the cable, between the transmitter and the track circuit, or both. This phase adjuster adjusts the output impedance of the transmitter to minimize the phase difference between the output voltage and output current of the transmitter.

That is, the present invention provides a track having a transmission means for transmitting a train detection signal or a train control signal to a connected rail, and a reception means for receiving a signal from the transmission means connected to the reception end of the rail. in the circuit, with the transmission means and between and interposed cable, each of the reactance component transformer and the rail and support Seputansu component between said rail and said receiving means of said rail, said train detection signal or the train The track circuit includes a phase adjuster that adjusts the phase difference between the voltage and current generated in the control signal so as to approach zero.

Further, the present invention is a track circuit including the transformer, wherein the phase adjuster includes an inductance value that brings a phase difference between a voltage and a current of a train detection signal or a train control signal transmitted by the transmission unit close to zero.

In the present invention, the phase adjuster adds a coil or a capacitor or both in parallel or in series to the outside or inside, and the voltage and current of the train detection signal or train control signal transmitted by the transmission means. This is a track circuit including a transformer having an inductance value and a capacity for bringing the phase difference of the input signal close to 0.

Furthermore, the present invention, the phase adjuster, a phase difference between the voltage and current of the transmitted during a train-rail train control signal is a track circuit for adjusting so as to approach zero.

Moreover, this invention is a track circuit in which the said phase adjuster adjusts the phase difference of the voltage and electric current of the train detection signal transmitted at the time of a train absent line so that it may approach zero.

The present invention is, reactance, resistance, and has a pseudo cable constituting a capacitor, using the pseudo cable, configured to be considered the cable length the same as the other track circuit, and more to the phase adjuster A track circuit that makes the phase difference between the voltage and current generated in the train detection signal or the train control signal approach zero.

  According to the present invention, the reactive power can be minimized and the active power can be maximized by minimizing the phase difference between the output voltage and output current of the transmitter in the train detection signal and the train control signal output from the transmitter. Efficient signal transmission becomes possible.

  With such a method, it is possible to ensure train detection performance and train control performance without increasing the rated output of the transceiver, without shortening the rail length, or without shortening the cable length. .

The best mode for carrying out the present invention will be described.
Embodiments of the track circuit of the present invention will be described with reference to the drawings.

  Example 1 will be described. A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of the track circuit of the present embodiment. The track circuit 1T of the present embodiment includes a transmitter 1, a phase adjuster 2, a transformer 3, a cable 4, a transformer 5, a rail 6, a transformer 7, a cable 8, a transformer 9, and a receiver 10. Yes. Train detection is performed by receiving the train detection signal output from the transmitter 1 by the receiver 10 via the track circuit 1T.

  The transmitter 1 outputs a train detection signal f1 to the track circuit 1T. Since the transformer 3, the cable 4, the transformer 5, the rail 6, the transformer 7, the cable 8, and the transformer 9 constituting the track circuit 1T each have a reactance component and a susceptance component, the track circuit 1T as a whole It has a reactance component and a susceptance component. Therefore, as shown in FIG. 2, the train detection signal f <b> 1 output from the transmitter 1 has a phase difference between voltage and current, and the absolute impedance of the output impedance on the track circuit side viewed from the transmitter 1. The value is Z1 and the phase is θ1. At this time, for the output voltage P1 of the transmitter 1, the active power P1e is calculated as P1e = P1 × cos θ1. Since the active power P1e is maximized when θ1 = 0, the phase adjuster 2 adjusts the phase θ1 to approach 0 or minimizes the active power to maximize or nearly maximize the effective power. A train detection signal can be output.

  The phase adjuster 2 includes a coil, a capacitor, or a coil and a capacitor. By changing the inductance value of the coil of the phase adjuster 2 or the capacitance of the capacitor, the reactance component and the susceptance component of the phase adjuster 2 are adjusted, and the phase θ1 of the output impedance of the transmitter 1 is brought close to 0 or minimized. To do. Although the phase adjuster 2 is inserted in series with respect to the track circuit in FIG. 2, the same effect can be obtained even if it is inserted in parallel.

  In addition, about a train detection signal, it is preferable to make the phase difference of the voltage of a signal and an electric current the minimum or close | similar to 0 at the time of a train absent line.

  A second embodiment will be described. A second embodiment of the present invention will be described with reference to FIG. In this embodiment, the phase adjustment is performed by appropriately setting the inductance value of the transformer from which the transmitter 1 outputs a signal, thereby making the phase difference between the output voltage and the output current of the transmitter 1 close to 0 or minimized. Thus, the track circuit optimizes the output of the transmitter 1.

  FIG. 3 is a block diagram of the track circuit of the present embodiment. The transformer 3 is constituted by a coil. The coil of the transformer 3 has an inductance value. Therefore, the output impedance of the transmitter 1 can be changed by adjusting the inductance value of the coil. Therefore, the inductance value of the coil of the transformer 3 is set so that the phase difference between the output voltage and the output current of the transmitter 1 approaches 0 or is minimized. As a result, as in the first embodiment, it is possible to output the train detection signal output from the transmitter at the maximum or almost the maximum effective power. Since other processes are the same as those in the first embodiment, description thereof is omitted here.

  A third embodiment will be described. A third embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the effective power of the train control signal f2 is maximized by optimizing the phase adjustment in the track circuit shown in the first embodiment and the second embodiment at the time of train presence.

  FIG. 4 is a block diagram of the track circuit shown in the first embodiment, particularly when the train is on line. FIG. 5 is a block diagram of the track circuit shown in the second embodiment, particularly when the train is on. 4 and 5, when the train 11 is present, the rail 6 is short-circuited by the axle of the train 11, and the output voltage and output current of the transmitter 1 change compared to when the train is absent. The train control signal f2 is transmitted through a coil provided at the head of the train 11 after the current flowing in the rail is converted into a voltage by the electromagnetic induction phenomenon to a receiver in the train 11, so that the current needs to exceed a certain value. . As a result, the phase difference between the output voltage and the output current also changes. By making the phase difference of the output impedance of the transmitter 1 close to 0 or minimized when the train 11 is present, the rail current of the train control signal f2 is reduced. Can be maximized or nearly maximized. Since other processes are the same as those in the first embodiment, description thereof is omitted here.

  Example 4 will be described. As shown in FIG. 6, the track circuit of the present embodiment includes pseudo cables 12 and 13 constituted by reactances, resistors, and capacitors. In multiple track circuits, if each track circuit has a different cable length, use a pseudo cable composed of reactance, resistance, and capacitor, and configure the cable length to be considered the same as other track circuits. The electrical performance of the circuit is uniform. A phase circuit or a transformer 3 having an inductance is used as a track circuit in which the phase difference between the voltage and the current approaches 0. Accordingly, it is possible to efficiently transmit even in track circuits having different cable lengths by the phase adjuster having the same electrical performance or the transformer having the inductance.

1 is a block diagram of a train detection device in Embodiment 1. FIG. FIG. 3 is a diagram for supplementarily explaining the first embodiment. It is a block diagram of the train detection apparatus in Example 2. It is a block diagram of the train detection apparatus in Example 3. It is a block diagram of the train detection apparatus in the modification of Example 3. It is a block diagram of the train detection apparatus in Example 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Transmitter, 2 ... Phase adjuster, 3 ... Transformer, 4 ... Cable, 5 ... Transformer, 6 ... Rail, 7 ... Transformer, 8 ... Cable, 9 ... Transformer, 10 ... Receiver, 11 ... Train, 12 ... pseudo cable, 13 ... pseudo cable

Claims (6)

In a track circuit having a transmitting means for transmitting a train detection signal or a train control signal to a connected rail, and a receiving means connected to the receiving end of the rail and receiving a signal from the transmitting means,
It said transmission means and between said rail and the rail and interposed cable between said receiving means, transformers and with the respective reactance component and Sa Seputansu component rails, the train detection signal and the train control signal A track circuit comprising a phase adjuster for adjusting a phase difference between a generated voltage and a current to approach zero. The track circuit according to claim 1, wherein
The track circuit according to claim 1, wherein the phase adjuster includes a transformer having an inductance value that brings a phase difference between a voltage and a current of a train detection signal or a train control signal transmitted by the transmission unit close to zero. The track circuit according to claim 1, wherein
The phase adjuster adds a coil or a capacitor or both externally or internally in parallel or in series, and sets the phase difference between the voltage and current of the train detection signal or train control signal transmitted by the transmission means to zero. A track circuit comprising a transformer having an inductance value and a capacity to approach. The track circuit according to any one of claims 1 to 3,
The phase adjuster adjusts a phase difference between a voltage and a current of a train control signal transmitted when the train is on line so as to approach zero. The track circuit according to any one of claims 1 to 3,
The phase adjuster adjusts the phase difference between the voltage and current of the train detection signal transmitted when the train is not present so as to approach zero. In the track circuit according to any one of claims 1 to 5,
Reactance, resistance, and has a pseudo cable constituting a capacitor, using the pseudo cable, configured to be considered the cable length the same as the other track circuit, and more to the phase adjuster, the train detection signal and A track circuit characterized in that a phase difference between a voltage and a current generated in the train control signal approaches zero.

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