JPH0433669B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a vehicle control device having both a vehicle detection function and a vehicle speed control function, such as an automatic train control device (hereinafter referred to as an ATC device).

<Prior art> In a vehicle control device such as an ATC device, a ground device sends an amplitude-modulated speed signal to a ground track circuit, and this speed signal is transmitted using an on-board antenna, an on-board receiver, etc. By receiving and decoding it with an on-vehicle device, the permissible speed of the own vehicle is determined, and the vehicle is driven at a safe speed.
As a conventional technique for detecting a vehicle in this ATC device, a method is known in which a vehicle detection signal is sent from a ground device to a track circuit, and a ground receiver receives a short circuit in the track circuit caused by a vehicle axle.

As a conventional technique for transmitting a speed signal from a ground device to an onboard device in a bidirectional operation section, there is a method of laying an independent extension line along a track circuit and transmitting a speed signal using this extension line.

A conventional technology that enables vehicle detection when a speed signal is transmitted by installing an extension track is that the speed signal is sent to the track circuit in the case of pure direction driving, and the speed signal is attached in the case of reverse direction driving. A method is used to send the information to the line.

Other conventional examples of transmitting speed signals from both the front and rear of the vehicle in the case of bidirectional driving include a commercial track circuit system and a system using a specific carrier wave for vehicle detection.

<Problems to be Solved by the Invention> However, the above-described conventional vehicle control device for bidirectional operation has the following problems.

(A) In the conventional technology that supplies speed signals and vehicle detection signals to the track circuit, it is necessary for the vehicle detection receiver to distinguish the vehicle detection signal from the speed signal, and the circuit of the vehicle detection receiver is complicated. become.

(B) With the commercial track circuit system, power outage coverage is not possible unless a special power source is used.

(C) In a method that uses a specific carrier wave for vehicle detection, it is necessary to provide multiple carrier waves for vehicle detection.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, to be able to provide speed signals to the on-vehicle receiver from both the front and rear directions of the vehicle even in the case of bidirectional driving, and to be able to detect vehicles. The object of the present invention is to provide a vehicle control device that is capable of controlling vehicles.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a vehicle control device having a ground device and an on-board device, wherein the ground device has a track circuit and a vehicle detection signal transmission system. the track circuit is divided into a plurality of blocked sections at intervals, and each of the blocked sections constitutes a signal transmission path. The vehicle detection signal transmitter is connected to one end of each of the well-intentioned blocked sections and transmits a vehicle detection signal, and the vehicle detection signal receiver is connected to one end of each of the blocked sections. is connected to the end side and receives the vehicle detection signal; the extension wire is laid along the track in each of the closed sections and forms a closed circuit; the speed signal is , is connected to the extension wire and transmits a speed signal, and the on-board device includes a front on-board receiver and a rear on-board receiver that have different reception frequencies, and is connected to the front on-board device. a receiver is provided at the front of the vehicle, and the rear on-vehicle receiver is provided at the rear of the vehicle,
The on-vehicle receiver and the rear on-vehicle receiver are electromagnetically coupled with the attachment wire to receive the speed signal, and the vehicle detection signal is transmitted from the front on-vehicle receiver and the rear on-vehicle receiver. The speed signal has a carrier frequency that differs depending on the traveling direction of the train, and is not received by the front onboard receiver or the rear onboard receiver corresponding to the traveling direction. , which is a signal that is not received by the vehicle detection signal receiver.

<Function> The track circuit is divided into a plurality of blocked sections at intervals, each blocked section constitutes a signal transmission path, and a vehicle detection signal transmitter is connected to one end of each blocked section, The vehicle detection signal receiver is connected to the other end of each blockage section and receives the vehicle detection signal, so if there is no vehicle in the blockade section, the vehicle detection signal receiver is connected to the other end of each blockage section and receives the vehicle detection signal. is received by the vehicle detection signal receiver, and if a vehicle is present in the blocked section, the axle of the vehicle short-circuits the track, making it impossible for the vehicle detection signal receiver to receive the vehicle detection signal. Trains can be detected based on the presence or absence of trains.

Here, since the vehicle detection signal is a signal that is not received by the front on-board receiver and the rear on-board receiver, the on-board device operates without being affected by the vehicle detection signal.

The extension wire is laid along the track in each blocked section and forms a closed circuit, and the speed signal transmitter is connected to the extension wire and sends a speed signal,
The on-vehicle device includes a front on-vehicle receiver and a rear on-board receiver that have different reception frequencies. It is installed at the rear of the train, and the front onboard receiver and the rear onboard receiver electromagnetically engage with the extension wire to receive speed signals, and the speed signals have different carrier frequencies depending on the direction of travel of the train. Therefore, the front on-vehicle receiver or the rear on-vehicle receiver located on the front side in the direction of travel can receive the speed signal. Therefore, even in the case of bidirectional driving, speed signals can be received from both the front and rear directions of the vehicle.

Here, since the speed signal is a signal that is not received by the vehicle detection signal receiver, it does not affect vehicle detection.

As a result, even in the case of bidirectional driving, a vehicle control device can be provided which can provide speed signals to the on-vehicle receiver from both the front and rear of the vehicle and can also detect vehicles.

<Embodiment> FIG. 1 is a block diagram mainly showing the ground equipment of a vehicle control system according to the present invention, and FIG. 2 is a block diagram mainly showing the on-vehicle equipment. In Figure 1, 1
2 is a track circuit, 2 is a vehicle, 3 is a vehicle detection signal transmitter, 5 is a vehicle detection signal receiver, 6 is an extension wire, and 8 is a speed signal transmitter. In FIG. 2, A is an on-vehicle receiver, and B is a rear on-vehicle receiver.

The track circuit 1 is divided into a plurality of closed sections 1T, 2T, and 3T at appropriate intervals. The closed sections 1T, 2T, and 3T constitute a signal transmission path. The vehicle 2 travels along the track circuit 1 in both forward directions a and reverse directions b. In the blockage section 1T, for example, a modulated wave (f ₃ +fm ₃ ) obtained by amplitude modulating the carrier wave f ₃ with a rectangular wave fm ₃ is used as a speed signal to be given from the front of the vehicle 2, and a speed signal to be given from the rear of the vehicle 2. As, the carrier wave f ₄ is a square wave fm ₄
The modulated waves (f ₄ + fm ₄ ) that are amplitude-modulated are made to correspond to each other.

Coils 101 and 102 are provided at each closure boundary of the closure sections 1T to 3T, and one coil 101 is coupled with the coil 4 connected to the vehicle detection signal transmitter 3, and the other coil 102 is connected to the vehicle detection signal transmitter 3. A signal receiver 5 is coupled thereto.

The vehicle detection signal transmitter 3 sends a vehicle detection signal TD ₁ in the form of an amplitude modulated wave to the track circuit 1 . This vehicle detection signal TD ₁ is transmitted as a signal that is not received by the front on-board receiver A and the rear on-board receiver B mounted on the vehicle 2. Taking the blockage section 1T as an example, a speed signal (f ₃ + fm ₃ ) and an amplitude modulation signal (f ₄ +fm ₄ ) are transmitted to the extension wire 6 in this blockage section 1T, and are used as the speed signal of the opposite track. An amplitude modulated signal of (f ₁ +fm ₀ ) based on the carrier wave f ₁ to be used and the signal wave fm ₀ not received on the vehicle is transmitted as the vehicle detection signal TD ₁ . Reference numeral 31 in FIG. 1 is an oscillator that oscillates a carrier wave f ₁ ; 32 is an oscillator that oscillates a rectangular wave fm ₀ that applies amplitude modulation to the carrier wave f ₁ ;
33 is a modulator, and 34 is an amplifier.

The vehicle detection signal TD ₁ sent from the vehicle detection signal transmitter 3 to the track circuit 1 is received by the vehicle detection signal receiver 5 through the track circuit 1 if there is no vehicle 2 in the closed section 1T, Filter 5
1, the f ₁ component is extracted by the detector 52.
After detection by the filter 53, the fm ₀ component is extracted. As a result, it is detected that no vehicle is present in the blocked section 1T. However, when the vehicle 2 is present in the blocked section 1T, the track circuit 1 is short-circuited by its axle, so the vehicle detection signal receiver 5 cannot receive the vehicle detection signal TD ₁ . From this, it is detected that the vehicle 2 exists within the closed section 1T.

Here, as described above, since the amplitude modulation signal (f ₁ +fm ₀ ) is used as the vehicle detection signal TD ₁ , the vehicle detection signal TD ₁ is transmitted to the front on-board receiver A of the vehicle 2, the rear on-board receiver A, and the rear on-board receiver A of the vehicle 2. It is not received by receiver B, so its function as an ATC device is not impaired by train detection.

In addition, the frequency signal f ₁ used for the speed signal of the ATC device is used as a carrier wave, and a rectangular wave fm ₀ to which amplitude modulation is applied is applied to each blockage section 1T, 2.
Having the same frequency at T, 3T, . . . has the advantage that the detection circuit of the vehicle detection signal receiver 5 can be simplified.

6 is an extension wire laid along the track circuit 1. The extension wires 6 are provided independently for each of the closed sections 1T to 3T, and are connected to a speed signal transmitter 8 through a coupler 7. The speed signal transmitter 8 transmits speed signals set for each of its own closed sections 1T to 3T. For example, taking the block section 1T as an example, a modulated wave (f ₃ + fm ₃ ) obtained by amplitude modulating the carrier wave f ₃ with a rectangular wave fm ₃ is applied to the front part of the vehicle 2 traveling in the forward direction a, and _A modulated wave (f _{4 +}
fm ₄ ) respectively. Therefore, these speed signals (f ₃ +fm ₃ ) and (f ₄ +fm ₄ ) are not received by the vehicle detection receiver 5 on the track circuit 1 side.

Next, the configuration of the on-vehicle device will be explained with reference to FIG. 2. In FIG. 2, the configuration of the on-board receiver for the blocked section 1T is representatively shown.
Similar on-vehicle receivers are configured for the other blocking circuits 2T, 3T, . . . . In the figure, the front on-vehicle receiver A includes a front antenna 9 mounted on the front of the vehicle 2, a filter 10 for extracting the _f3 component,
Detector 11 and filter 12 for extracting ₃ fm components
It is configured with the following. Rear on-board receiver B
is the rear antenna 1 attached to the rear of the vehicle 2.
3. Filter 14 for extracting _f4 components, detector 15
and a filter 16 for extracting the _four fm components.

When the vehicle 2 travels in the forward direction a and enters the blocked section 1T, the speed signal (f ₃ +
fm ₃ ) is received by the front antenna 9 of the vehicle 2 and guided to the front onboard receiver A. In the on-board receiver A, the filter 10 extracts the _f3 component, the detector 11 detects it, and the filter 12 extracts the f3 component.
Extract fm ₃ components. This signal is used as current information when traveling in the forward direction a.

On the other hand, the speed signal (f ₄ +fm ₄ ) sent from the speed signal transmitter 8 to the extension wire 6 is received by the rear antenna 13 of the vehicle 2 and guided to the rear on-board receiver B.
Then, the _f4 component is extracted by the filter 14,
After the wave is detected by the detector 15, the _fm4 component is extracted by the filter 16. This signal is used as current information when traveling in the opposite direction b.

Therefore, it is possible to control the vehicle 2 by giving speed signals from both the front and rear sides of the vehicle 2 at the same time as detecting the train. In addition, in the above embodiment, the blockage section 1
Although the explanation has been given using T as an example, other blocked sections 2T,
3T, . . . as well, similar effects can be obtained with the same configuration.

In the above-mentioned embodiment, for convenience of explanation, the case of a single track was explained as an example, but it can also be applied to a double track.
In this case, from the viewpoint of preventing mutual interference of speed signals, frequency signals f ₁ and f ₂ that were assigned to vehicle detection signals on the track on the opposite side are used as speed signals, and The frequency signals f ₃ and f ₄ that were detected are used as vehicle detection signals.

<Effects of the present invention> As described above, according to the present invention, the following effects can be obtained.

(a) The track circuit is divided into a plurality of blocked sections at intervals, each blocked section constitutes a signal transmission path, and a vehicle detection signal transmitter is connected to one end of each blocked section, and a vehicle detection signal transmitter is connected to one end of each blocked section. The vehicle detection signal receiver is connected to the other end of each blocked section and receives the vehicle detection signal, so train detection is performed depending on whether or not a vehicle shorts the blocked section. It is possible to provide a vehicle control device that is capable of

(b) The guide wire is laid along the track in each blocked section and forms a closed circuit, and the speed signal transmitter is connected to the guide wire and sends a speed signal, and is connected to the onboard equipment. includes a front on-vehicle receiver and a rear on-board receiver having mutually different reception frequencies, and the front on-board receiver is provided at the front of the vehicle,
A rear on-board receiver is provided at the rear of the vehicle, and the on-board receiver and the rear on-board receiver are electromagnetically coupled to the extension wire to receive a speed signal, and the speed signal is
Since the carrier frequency differs depending on the traveling direction of the train, it is possible to provide a vehicle control device that can receive speed signals from both the front and rear of the vehicle even in the case of bidirectional operation.

(c) The vehicle detection signal is a signal that is not received by the front on-board receiver and the rear on-board receiver, and the speed signal has a carrier frequency that differs depending on the direction of travel of the train. Since the signal is received by the front on-vehicle receiver or rear on-vehicle receiver but not the vehicle detection signal receiver, there is no mutual interference and the speed signal can be received from both the front and rear of the vehicle. It is possible to provide a vehicle control device that can be applied to an on-vehicle receiver and can also detect a vehicle.

[Brief explanation of drawings]

Fig. 1 is a block diagram centered on the ground equipment of the vehicle control device according to the present invention, and Fig. 2 is a block diagram of the closed section 1T.
FIG. 2 is a block diagram showing the configuration of an on-vehicle device for the vehicle. DESCRIPTION OF SYMBOLS 1...Track circuit, 2...Vehicle, 3...Vehicle detection signal transmitter, 5...Vehicle detection signal receiver, 6...
Attachment line, 8... Speed signal transmitter, A, B... On-vehicle receiver.

Claims (1)

[Scope of Claims] 1. A vehicle control device having a ground device and an on-board device, wherein the ground device includes a track circuit 1, a vehicle detection signal transmitter 3, a vehicle detection signal receiver 5, Extension line 6
and a speed signal transmitter 8, the track circuit 1 is divided into a plurality of closed sections 1T to 3T at intervals, and the closed sections 1T to 3
Each of the T constitutes a signal transmission path, and the vehicle detection signal transmitter 3 is connected to the closed section 1.
The vehicle detection signal receiver 5 is connected to one end side of each of the blocks T to 3T and sends out a vehicle detection signal.
It is connected to the other end side of each of T to 3T and receives the vehicle detection signal, and the extension wire 6 is laid along the track in each of the closed sections 1T to 3T, and also connects to the closed circuit. The speed signal transmitter 8 is connected to the extension wire 6 and transmits a speed signal, and the on-board device includes a front on-board receiver A and a front on-board receiver A that have different reception frequencies. , a rear on-vehicle receiver B,
The front on-vehicle receiver A is provided at the front of both of the vehicles, the rear on-vehicle receiver B is provided at the rear of the vehicle, and the on-vehicle receiver A and the rear on-vehicle receiver B are provided on the vehicle. It is electromagnetically coupled to the attachment wire 6 to receive the speed signal, and the vehicle detection signal is a signal that is not received by the front on-vehicle receiver A and the rear on-board receiver B, and the The speed signal has a different carrier frequency depending on the traveling direction of the train 2, and is received by the front onboard receiver A or the rear onboard receiver B corresponding to the traveling direction, and is received by the vehicle detection signal receiver. 5, the vehicle control device is a signal that is not accepted.