JPH0528144Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The invention comprises a ground transducer and a receiving circuit that are electromagnetically coupled to an on-board antenna, and provides a signal received by the ground transducer to the receiving circuit. Regarding the train sorting receiving device that discriminates the train type, a gate circuit is provided at the front stage of the receiving circuit, and once the receiving circuit receives the train type signal, the signal to the receiving circuit is transmitted while the train is within the blockade section. By controlling the gate circuit to cut off the input, it is possible to prevent malfunctions caused by noise from, for example, an on-board motor or a chopper device.

<Prior art> In order to set the level crossing closure time according to the type of train, a train selection receiving device is set in the blocked section before the blocked section where the level crossing is located, and by electromagnetic coupling with the on-board antenna, It has been common practice in the past to determine the type of train by applying a signal received by a wayside transducer to a receiving circuit. FIG. 7 is a block diagram schematically showing the configuration of a conventional train selection receiving device.
is a track, 2 is a train, and 3 is a railroad crossing. Trajectory 1 has many closed sections 1T, 2T, 3T ~ at appropriate distances.
It is divided into nT. Within the blockage section 1T to nT,
In a blocked section located at a predetermined distance from the level crossing 3, for example, blocked section 2T, there is a beacon 4 that is electromagnetically coupled to an onboard antenna (not shown) mounted on the train 2.
The train type signal received by the wayside transducer 4 is input to the receiving circuit through the coupler 5.

The receiving circuit includes a train sorting section 8 downstream of the bandpass filter 6 and amplifier 7. Since the train type signal is generally given as a different frequency signal, the train sorting section 8 uses a frequency sorting circuit _BP1.
- BP _o , the relays FR ₁ -FR _o are driven by the output signals of the frequency selection circuits BP ₁ -BP _o , and the type of the corresponding train is determined from the combination of the contact outputs. FIG. 8 is a diagram showing a train selection circuit based on a combination of contacts of relays FR ₁ to _{FR o .}
is a contact (hereinafter referred to as an operating contact) that closes when relays FR ₁ to _{FR o} are activated (excited), SR is a train selection relay, and P ₁ to P _o are setting plugs. and,
Using operating contact SR ₁ of train sorting relay SR,
Outputs train selection signals.

Further, train detection is also performed simultaneously using operating contacts fR ₁ to fR _o of relays FR ₁ to FR _o . FIG. 9 is a train detection circuit diagram, in which the train detection relay TDR is driven by the OR of operating contacts fR ₁ to fR _o , and a train detection signal is output using the operating contact TDR ₁ of the train detection relay TDR. Note that B(+) indicates a DC power supply.

The operation of the train selection receiving device described above will be explained with reference to FIG. For example, the blockage section
When the train 2 enters the blocked section 2T from 3T, the beacon 4 is electromagnetically coupled to an on-board antenna (not shown) of the train 2, and a train type signal is received as shown in FIG. 10a. Train type signal relay
Assuming that the signal is such as to operate FR ₁ and FR ₂ , the operating contacts fR ₁ and
fR ₂ closes. In the figure, the case where the operating contacts fR ₁ and fR ₂ are closed is expressed as logic 1, and the case where they are open is expressed as logic 0.

When the operating contacts fR ₁ and fR ₂ close, the train selection relay SR operates in the selection circuit shown in FIG. 8.
Logic 1 in FIG. 10c corresponds to the operating state of the train sorting relay SR, and logic 0 corresponds to the de-energized state. When the train sorting relay SR operates, the operating contact _SR1 closes in FIG. 8, so that a sorting output is obtained. Also, when operating contact fR ₁ or fR ₂ closes, train detection relay TDR operates (Fig. 10 d).
However, since the operating contact TDR ₁ closes, a train detection output is obtained.

Therefore, as shown in FIG. 10e, a train sorting/train detection signal is output in response to the reception of the train type signal. Then, based on this train selection/train detection signal, the closing time of the level crossing 3 is set depending on the type of train.

<Problem to be solved by the invention> However, since trains are usually equipped with motors, chopper devices, etc., electromagnetic waves leaking from the motors, chopper devices, etc. are received by the ground element 4, and as shown in FIG. As shown in a, the received input includes noise. Then, due to these noises, for example, the train detection relay TDR operates (the 10th
(see Figure 10 d and e), resulting in erroneous output (see Figure 10 d and e).
(see).

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a train selection receiving device that can solve the above-mentioned conventional problems and prevent malfunctions caused by noise from on-board motors, chopper devices, etc.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention provides a train sorting receiving device that is installed on the ground and includes a beacon, a gate circuit, a receiving circuit, and a control circuit. The beacon is electromagnetically coupled to an onboard antenna installed on the train to receive the train type signal, and the receiving circuit receives the train type signal received by the beacon and determines the train type. The gate circuit is installed between the beacon and the receiving circuit, and the control circuit is a circuit that outputs a signal to indicate whether the train is within the blockage section after the receiving circuit receives the train type signal from the beacon. The gate circuit is controlled to cut off the signal input from the ground element to the receiving circuit.

<Operation> The train sorting receiving device having the above configuration once receives the train type signal from the beacon through the gate circuit, closes the gate circuit, and, while the train is within the blockade section, receives the train type signal from the beacon through the gate circuit. Since the signal input to the receiving circuit is blocked, even if noise emitted from the motor, chopper device, etc. on the upper side of the vehicle is received by the ground transducer, it will not be input to the receiving circuit. Therefore, malfunctions due to noise can be reliably prevented.

<Embodiment> Fig. 1 is a block diagram of a train selection receiving device according to the present invention, Fig. 2 is a train selection circuit, Fig. 3 is a train detection circuit, and Figs. 4 and 5 are control circuits. In the figure, the same reference numerals as in FIGS. 7 to 9 indicate the same components. In comparison with the conventional example shown in FIGS. 7 to 9, FIG. 1 corresponds to FIG. 7, FIG. 2 corresponds to FIG. 8, and FIG. 3 corresponds to FIG. 9, respectively.

TR in Figure 1 is the blockage section targeted for detection.
The track relay installed in 2T becomes de-energized when train 2 enters the blocked section 2T. Orbital relay TR
A contact TR ₁ (hereinafter referred to as a falling contact) that closes when the relay becomes off (non-energized) is used as a contact for operating the relay TPR, as shown in FIG.

GTR ₃ is the operating contact that constitutes the gate circuit. In this embodiment, it is inserted between a bandpass filter 6 and a coupler 5 that constitute a receiving circuit. Contact GTR ₃ is the gate control relay in Figure 5.
This is the operating contact of GTR. Gate control relay GTR
is the falling contact of the train sorting relay SR (see Figure 2)
Power is supplied through the series circuit of SR ₃ and the falling contact TDR ₃ of the train detection relay TDR (see Figure 4). In addition, a series circuit of a resistor R ₁ and a capacitor C ₁ is connected in parallel to the gate control relay GTR, and due to the charge accumulated in the capacitor C ₁ , even after the falling contacts SR ₃ and TDR ₃ are opened, the predetermined Only time is retained.

As shown in Fig. 2, the train sorting circuit includes a circuit that supplies power to the train sorting relay SR through its operating contact SR ₂ and the operating contact TPR ₁ of the relay TPR. A train sorting detection signal can be obtained through contact GTR ₁ .

Next, the train detection circuit connects its own operating contact to the train detection relay TDR, as shown in Figure 3.
A circuit is added for supplying power through TDR ₂ and the operating contact TPR ₂ of the relay TPR, and is further adapted to obtain a train detection signal through the operating contact GTR ₂ of the gate control relay GTR.

When the train 2 steps into the blocked section 2T from the blocked section 3T, the falling contact TR ₁ of the track relay TR closes and the relay TPR operates (see Figure 4). relay
The operation of TPR causes its operating contacts TPR ₁ and
TPR ₂ closes.

In this state, the train selection relay SR and train detection relay TDR are not operating, so the falling contact
SR ₃ and TDR ₃ remain closed. Therefore, the gate control relay GTR is in the operating state (Figs. 5 and 6).
(see figure g), and the gate circuit constituted by its operating contact GTR ₃ is in a conductive state. Therefore, when the beacon 4 is electromagnetically coupled to the onboard antenna of the train 2 and a train type signal is received (see Fig. 6a), the received signal is transmitted to the operating contact forming the gate circuit.
Input to the receiving circuit through GTR ₃ . and,
Relays FR ₁ and FR ₂ operate, and their operating contacts fR ₁ ,
fR ₂ closes.

When operating contacts fR ₁ and fR ₂ close, train sorting relay SR operates in the sorting circuit shown in FIG. 2 and is self-held by its own operating contact SR ₂ (see FIG. 6c). A similar effect can be obtained in the train detection circuit shown in FIG. 3, and the train detection relay TDR is self-maintained (see FIG. 6d).

When train selection relay SR and train detection relay TDR operate, operating contacts SR ₃ and TD3 open, so
The power supply path through the operating contacts SR ₃ and TD ₃ to the gate control relay GTR is interrupted, but the gate control relay GTR is activated by the time constants C ₁ , R ₁ due to the charge stored in the capacitor C ₁ . After the operating state is maintained for a delay time Td, which is determined by the amount of time, it is turned off (see Fig. 6g).

When the gate control relay GTR is turned off, its operating contacts GTR ₁ to GTR ₃ open, so the train selection output signal and the train detection output signal disappear, and
The gate circuit via operating contact GTR ₃ is turned off.
Therefore, a train selection/detection signal corresponding to the delay time Td is output (see FIG. 6e), and signal transmission from the wayside element 4 to the receiving circuit is interrupted.
Therefore, after this, if the noise leaking from the motor or chopper device installed on the train 2 is transmitted to the ground wire 4,
Even if the signal is received by the receiver, it is not incorporated into the receiving circuit, and malfunctions due to noise will not occur.

As described above, even after the gate control relay GTR is turned off, the train selection relay SR and train detection relay TDR are self-held by their own operating contacts SR ₂ and TDR ₂ (Fig. 6c). and d).
This state continues while the relay TPR is operating, that is, while the train 2 is in the blocked section 2T.
Then, when the train 2 exits the blocked section 2T, the track relay TR is activated, and the relay TPR is turned off, the original state is restored.

In addition, some or all of each relay and contact,
It may be replaced by a non-contact relay made of semiconductor.

<Effects of the invention> As described above, in the present invention, after the receiving circuit once receives the train type signal from the beacon through the gate circuit, the gate circuit is closed, and while the train is in the block section, Since the signal input from the ground transducer to the receiving circuit is blocked, even if noise emitted from the motor or chiyotsupa device on the top of the train is received by the ground transducer, it will not be input to the receiving circuit, and the noise will be reduced. It is possible to provide a train selection receiving device that can reliably prevent malfunctions due to the above.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the train selection receiving device according to the present invention, Fig. 2 is a train selection circuit diagram, Fig. 3 is a train detection circuit diagram, Figs. 4 and 5 are control circuit diagrams, and Fig. 6 is a train detection circuit diagram. Similarly, FIG. 7 is a block diagram of a conventional train selection receiving device, FIG. 8 is a train selection circuit diagram, FIG. 9 is a train detection circuit diagram, and FIG. 10 is a time chart thereof. 1...Track, 2...Train, 4...Ground, 6~
8... Receiving circuit, GTR... Gate control relay,
SR...Train selection relay, TDR...Train detection relay, GTR ₃ ...Contacts that make up the gate circuit.

Claims (1)

[Scope of claim for utility model registration] Ground transducer 4, receiving circuits 6 to 8, and gate circuit
A train classification receiving device installed on the ground, including a GTR ₃ and a control circuit GTR, wherein the beacon 4 receives a train type signal by electromagnetically coupling to an onboard antenna provided on the train. The receiving circuits 6 to 8 are circuits into which the train type signal received by the beacon 4 is input and output a signal for determining the train type, and the gate circuit GTR ₃ is The control circuit GTR is provided between the beacon 4 and the receiving circuits 6 to 8, and after the receiving circuits 6 to 8 receive the train type signal from the beacon 4,
The train sorting receiving device is a circuit that controls the gate circuit GTR ₃ so as to block signal input from the beacon 4 to the receiving circuits 6 to 8 while the train is in the blocked section.