JPS6044178B2 - Boundary short circuit type non-insulated track circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a boundary short circuit type uninsulated track circuit.

Conventionally, there is a non-insulated track circuit as shown in FIG.

A rail shorting line is connected between rails R, R (7) A, A and B, B, shorting the rails and connecting them to 1T, 2T and 3T.
Configure the track circuit.

A″ between the rails of the 2T track circuit from A, A to A, A″
, A'' and between the rails of the 2T track circuit from B, B to B, B'', and between B'' and B'', respectively. Insert the inductance of the rail between A and A'' and C. Also, B
, B'' and C., 2T.
Parallel resonance is produced in the signal frequency f used in the track circuit. In this case, the impedance when looking to the right of A'', A'' and to the left of B'', B'' is the signal frequency f
, exhibiting high impedance. Therefore, the transmitter TX is connected to A″, A″, and the receiver RX is connected to B″, B″.
When connected, the transmission output from TX is transmitted only in the direction of the receiving end, and in the opposite direction, it does not flow out due to the short circuit existing between A and A. When a train enters between A'', A'' and B'', B'', the RX track relay falls, and at the same time the train is detected,
A short-circuit current with a signal frequency f due to a short-circuit in the train's axle flows in the track circuit, and signal information of the track circuit is induced by electromagnetic induction in a power receiver installed on the train, and the signal information is transmitted by the on-board receiver. The signal is received and the speed of the train is controlled. However, in order to improve the transmission efficiency at the power transmitting end and the power receiving end with this method, it is necessary to increase the impedance at the time of parallel resonance.
From capacitor C. Insertion points A″, A″ and B″, B
However, if this distance is increased, the train detection characteristics within this distance will become looser, and both sides A, A'' centering on the short circuit lines A, A and B, B. , A, A″, or B, B″, B,
It is unavoidable that a dead section where trains cannot be detected will occur in some part between B''.A method shown in FIG. 2 is available to eliminate the defects of the method shown in FIG. 1.

In contrast to the method shown in Figure 1, in which the boundaries of the track circuit are short-circuited with short-circuit wires, this method uses resonators 1 and 2 that are connected in series with an inductance L or L2 and a capacitor C1 or C2.
, 1'', 2'' are short-circuited, and resonators 1 and 2'' are at the signal frequency f1 of the 2T orbit circuit, resonator 2 is at the signal frequency F2 of the 1T orbit circuit, and resonator 1'' is the signal of the 3T orbit circuit. It is set to cause series resonance at frequency F2, and the track circuits are overlapped between B'' and B'' and between A'' and A'' to prevent dead sections from occurring.

In addition, a capacitor C is installed at the rail points B and B between B″ and B″. Insert the inductance of the rail between B'' and B'' and C. This causes parallel resonance at the signal frequency f1 used in the 2T track circuit, and the inductance of the rail between B and B'' and C causes parallel resonance at the signal frequency F2 used in the 1T track circuit. 1T track circuit transmitter TXl and 2 are connected to that point.
Connect receiver RX2 for T orbit circuit, and also connect A″, A″
Insert the capacitor CO between the rail points A and A, and similarly
, the impedance of point A is increased, and the 2T orbit circuit transmitter TX2 and the 3T orbit circuit receiver RX3 are connected to that point. In this method, between B″ and BI and between A″ and A
Unlike the configuration shown in Figure 1, the track circuit is overlapped between B'' and B'', so there is no dead section, but if the train passes between B'' and B'' and reaches between B'' and B. Tsuta Toki, TX
While the signal information for the 1T track circuit is being received by the onboard receiver, the track relay of receiver RX2 of the 2T track circuit falls, and the signal information for the 1T track circuit is being received by the onboard receiver.
Since the signal information for the 1T track circuit becomes a stop signal, an unreasonable situation arises in which the train cannot run. Then the second
As a method of removing the above-mentioned defects in the method shown in the figure, it is possible to adopt a configuration as shown in FIG. 3.

Rail points B″, B″, B″, B″, A″, A″ and A″
, AI respectively, inductance thread or! Capacitor C is connected in series with capacitor C1 or C2.

Or C. Resonators 3, 4, 5, and 6 connected in parallel are inserted, and the series resonant circuit of resonator 3 has the signal frequency f1 of the 2T orbit circuit, and the series resonant circuit of resonator 4 has the signal frequency of the 1T orbit circuit. At F2, the series resonant circuit of resonator 5 is 3T.
At the signal frequency F2 of the track circuit, the series resonant circuit of the resonator 6 is set to resonate in series at the signal frequency f1 of the 2T track circuit, and furthermore, the inductance of the rail between B'' and B'' , 1 with capacitor CJ of resonator 3
Similarly, at the signal frequency F2 of the T-orbit circuit, resonator 4
capacitor C. At the signal frequency f1 of the 2T track circuit, the inductance of the track between A'' and A'', and the capacitor C of the resonator 5. and the signal frequency f of the 2T orbital circuit
1, and similarly capacitor C of resonator 6. ″Tode 3
At the signal frequency F2 of the T orbit circuit, parallel resonance is caused and the impedance is set to be increased, and the transmitter TXl for the 1T orbit circuit is attached to the resonator 3, and the receiver RX2 for the 2T orbit circuit is attached to the resonator 4. 2T orbit circuit transmitter TX2 on resonator 5
In addition, a 3T orbit circuit receiver RX3 is connected to the resonator 6, and a 1T orbit circuit and a 2T orbit circuit are connected between BI and B'', and a 2T orbit circuit and a 3T orbit circuit are connected between A'' and A''.
Make sure that the T-orbit circuit overlaps with the T-orbit circuit. With this configuration, the train can reach the transmission points B″, B″ of the 1T track circuit.
After passing through, train detection is performed by the receiver RX2 of the 2T track circuit while the on-board receiver receives the signal information of the 2T track circuit between B'' and B'', so the method shown in Figure 2 is used. The above-mentioned unreasonableness of the above does not occur, and since the track circuits overlap between B'' and B'' and between A'' and A'', no dead section occurs. However, in this method, B
In order to achieve complete overlap between ``, B'' and between A'' and A'', the frequency interval between adjacent track circuits, for example 1T and 2T, should be very far apart, or the frequency interval between each resonator should be very large. The sharpness of the series resonant circuit is made very sharp and the inductance of the resonant circuit is made large so that the series resonant circuit can be in the same state as a short circuit at the signal frequency of the adjacent track circuit. At a given signal frequency, the inductance of the rail between B'' and B'' and between A'' and A'''' is In the case of the track circuit, B'', B'' and A'',
It is necessary to make the capacitor C inserted into A'' resonate.This method is possible in principle, but in practice,
It is impossible to create a series resonant circuit that can realize the above-mentioned effect, and therefore, although it has been proposed, it has not been realized. The present invention has been made in order to eliminate the above-mentioned defects existing in conventional non-insulated track circuits.

The present invention will be explained with reference to FIGS. 4 to 7b.

A capacitor C is connected to a series resonant circuit in which an inductance L1 and a capacitor C1 are connected in series at rail points A and A on the 1T track circuit side across the virtual boundary line S1 of the track circuit on the rails Rl and R2.

'' are connected in parallel, and the transmitter TXl for the 1T track circuit is connected to it.A series resonant circuit is formed by connecting an inductance L2 and a capacitor C2 in series to the rail points B and B on the 2T track circuit side. Insert the resonator 8 of
The 2T orbit circuit receiver RX2 is connected to it.

Similarly, across the virtual boundary line S2 between the 2T track circuit and the 3T track circuit, a resonator 9 of a series resonant circuit in which an inductance L2 and a capacitor C2 are connected in series is connected to the rail points C and C on the 2T track circuit side. A capacitor C is connected to a series resonant circuit in which an inductance L1 and a capacitor C1 are connected in series to the rail points D and D on the track circuit side. resonator 10 connected in parallel with
Insert the 2T orbit circuit transmitter TX2 into the resonator 9,
A 3T orbit circuit receiver RX3 is connected to the resonator 10.
The series resonant circuit of the resonator 7 has the signal frequency f of the 2T orbital circuit.
1, the resonator 8 is at the signal frequency F2 of the 1T orbit circuit, the resonator 9 is at the signal frequency F2 of the 3T orbit circuit, and the series resonant circuit of the resonator 10 is at the signal frequency f1 for the 2T orbit circuit. and are set to resonate in series.
In addition, the resonator 7 has the inductance of the rail between A and B and the signal frequency F2 of the 1T track circuit, and the resonator 8 has the inductance of the rail between A and B.
At the inductance of the rail between C and D and the signal frequency f1 of the 2T track circuit, the resonator 9 has the inductance of the rail between C and D and the signal frequency f1 of the 2T track circuit. , the inductance of the rail between D and 3T
They are set to resonate in parallel at the signal frequency F2 of the track circuit. A resonator having the same configuration as the resonator 7 is inserted between the rails close to the other boundary line of the 1T track circuit, and a receiver for the 1T track circuit is connected to it.
A resonator having the same configuration as the resonator 10 is connected between the rails close to the other boundary line of the T track circuit, and a 3T
A transmitter for the track circuit is connected.

Therefore, the 1T orbit circuit and 2T orbit circuit overlap between A and B, and the 2T orbit circuit and 3T orbit circuit overlap between C and D. The ATC signal wave f1 for the 2T orbit circuit is transmitted from the transmitter TX2, transmitted through the 2T orbit circuit, and received by the receiver RX2.

Therefore, when there is no train within the 2T track circuit, 2T
The track relay of receiver RX2 of the T track circuit is in operation. It is assumed that train Tn is traveling in the direction of arrow a from the 1T track circuit. While the train is in the 1T track circuit, A and A are short-circuited by the series resonant circuit of the resonator 7, so the 2T track circuit is not affected by the ATC signal wave f1 from the transmitter TX2. The receiver R
It is received by X2 and operates the track relay. The train is A
, A and enters the 2T orbital circuit,
Due to the train axle short circuit, the reception level of the receiver RX2 of the 2T track circuit decreases, and the track relay of the receiver RX2 falls between A and B, detecting that the train has entered the 2T track circuit. Regarding the ATC signal on the train, the train is A, A
Until then, the ATC signal wave F2, which is transmitted from the transmitter TXl to A and A of the 1T track circuit and flows through the rails due to a short circuit in the axle of the train, is received by the power receiver on the train by electromagnetic induction and transmitted. After passing through A and A, the transmitter TX2
The ATC signal wave f1 for the 2T track circuit transmitted from to C and C is received by the power receiver on the vehicle and transmitted. Therefore, in the present invention, the system shown in FIG.
There is a defect that a dead section where trains cannot be detected occurs at the boundary part, and the method shown in Figure 2 has a defect that train detection on the 2T track circuit, which occurs when a train enters the 2T track circuit from the 1T track circuit, is still not possible. Because this is done while the ATC signal wave of the 1T track circuit is being received on the train,
There is no problem in which the stop signal of the 1T track circuit is received on the train and the train is unable to run. Further, in view of what has been described above with respect to FIG. 3, the most significant feature of the present invention is that the impedance at the power transmitting end and the power receiving end can be made sufficiently high using a resonator that can be manufactured normally.

As shown in FIG. 5, the impedance 1ZI of the series resonant circuit has a very small value at the resonant frequency, but increases again at frequencies other than the resonant frequency, such as Fa and Fb, and reaches the resonant frequency F. lower frequency F
At a, the impedance is capacitive, and at high frequencies, the impedance is inductive. Therefore, when using an uninsulated track circuit as shown in Figure 6a. A resonator 11 of a series resonant circuit that resonates with the signal frequency f1 of the track circuit is connected to A and A at the boundary part of
Next, if the resonator 12 of the series resonant circuit that resonates with the signal frequency F2 of the adjacent track circuit is connected to B and B, the frequency F2
, fl, then at the signal frequency f1 -
The resonator 12 of the series resonant circuit that resonates at the signal frequency F2 becomes a capacitive impedance, and the resonator 12 resonates at the signal frequency f1.
Since the resonator 11 of the series resonant circuit that resonates in the circuit has a very low impedance, the inductance of the track between A and B at the boundary part of the uninsulated track circuit in Figure 6a is ! , and the resistance is R. Then, it can be expressed as the equivalent circuit shown in FIG. 6b. As is clear from the equivalent circuit shown in FIG. 6b, this capacitive impedance Xc and rail inductance! By causing these to resonate in parallel, it is possible to increase the impedance of B and B that correspond to the power transmitting end and the power receiving end of the track circuit of the signal frequency f1. However, for Fig. 6 AO) A and A, the signal frequency? In 2, since the resonator 11 of the series resonant circuit that resonates at the signal frequency f1 becomes an inductive impedance, it is impossible to make it resonate in parallel with the inductance of the rail. Therefore, with such a configuration, Since it is not possible to increase the impedance of A and A that correspond to the power transmitting end and the power receiving end of the adjacent track circuit of signal frequency F2, it is not possible to form a boundary portion of an uninsulated track circuit. In the present invention, as shown in FIG. 7a, instead of the resonator of the series resonant circuit resonating at the signal frequency f1, a series resonator resonating at the signal frequency f1 is installed at the boundary portion A and A of the non-insulated track circuit. Add a capacitor C in parallel to the circuit.

By connecting the resonator 13 in which a ” and the inductance of the rail! By resonating in parallel, the impedance of A and A corresponding to the power transmitting end and the power receiving end of the adjacent track circuit of signal frequency F2 is increased, so that the boundary part of an uninsulated track circuit can be configured. This eliminates the defects of the method shown in FIG. According to the present invention, a dead section where a train cannot be detected does not occur at the boundary between the track circuits in the conventional system shown in FIG. By detecting a train on the front track circuit while receiving signal information from the rear track circuit when entering the circuit, it is possible to eliminate the unreasonable situation of temporarily receiving a stop signal on board the train, and With this technology, it is possible to increase the impedance between the power transmitting end and the power receiving end by using a resonator that can be constructed from manufacturable parts, and to clarify the boundaries of non-insulated track circuits.

Moreover, the structure of the boundary part is simple, for example, the third
Compared to the method shown in the figure, the capacitor at the boundary is 1
It is possible to configure a track circuit by reducing the number of pieces. Therefore, according to the present invention, when installing an uninsulated track circuit, it is possible to further reduce equipment costs and maintenance compared to conventional systems. Brief Description of the Drawings Figure 1 is a circuit diagram showing a conventional non-insulated track circuit, Figure 2 is a circuit diagram showing another conventional non-insulated track circuit, and Figure 3 is a circuit diagram showing a conventional non-insulated track circuit. A circuit diagram of an uninsulated track circuit considered to eliminate defects in an insulated track circuit, FIG. 4 is a circuit diagram showing an embodiment of the present invention, FIG. 5 is a diagram showing characteristics of a series resonant circuit, and FIG.
Figure a is a circuit diagram showing the configuration of a possible boundary part in an uninsulated track circuit, Figure 6b is an equivalent circuit diagram of Figure 6a,
FIG. 7a is a circuit diagram showing the configuration of a boundary portion in an embodiment of the present invention, and FIG. 7b is an equivalent circuit diagram of FIG. 7a.

Sl, S2...Boundary of track circuit, Rl, R2・
...Rail, Ll, Cl...Series resonant circuit, Ll, Cl, CO''...Resonator, L2, C2...
...Resonator, TXl, TX2...Transmitter, RX
2, RX3...Receiver.

Claims (1)

[Claims] 1 Across the boundary between adjacent track circuits, a resonator consisting of a series resonant circuit with a capacitor connected in parallel is connected between the rails of the rear track circuit, and an inductance is connected between the rails of the front track circuit. and a capacitor connected in series, respectively, and connect a transmitter for the rear track circuit to the resonator of the rear track circuit, and
A receiver for the forward track circuit is connected to the resonator of the forward track circuit, and a receiver is connected between the rails of the forward track circuit across the boundary between the forward track circuit and the adjacent track circuit further forward. A resonator in which an inductance and a capacitor are connected in series is connected to a resonator in which an inductance and a capacitor are connected in series, and a resonator in which a capacitor is connected in parallel is connected to a series resonant circuit in which an inductance and a capacitor are connected in series between the rails of the track circuit in the front. The transmitter for the forward track circuit is connected to the resonator of the track circuit, the receiver for the further forward track circuit is connected to the resonator of the track circuit further forward, and the receiver for the further forward track circuit is connected to the transmitter for the rear track circuit. The connected resonator is connected to the forward track circuit receiver at the forward track circuit signal frequency, and the resonator connected to the forward track circuit receiver is connected to the forward track circuit receiver at the back track circuit signal frequency. The resonator connected to the receiver for the further forward track circuit resonates in series at the signal frequency for the further forward track circuit, and the resonator connected to the receiver for the further forward track circuit resonates in series at the signal frequency for the further forward track circuit. Further, the resonator connected to the rear track circuit transmitter has a rail connection point of the resonator and a rail connection point of the resonator connected to the forward track circuit receiver. The resonator connected to the receiver for the forward track circuit transmits the signal for the forward track circuit at the inductance of the rail and the signal frequency for the forward track circuit between the inductance of the rail and the signal frequency for the forward track circuit. The resonator connected to the resonator has a rail inductance between the rail connection point of the resonator and the rail connection point of the resonator connected to the receiver for the track circuit further ahead, and the rail inductance for the front track circuit. At the signal frequency, the resonator connected to the further forward track circuit receiver is set to resonate in parallel with the inductance of the rail and at the further forward track circuit signal frequency, respectively. A boundary short circuit type uninsulated track circuit consisting of.