JP2538860B2 - Vehicle position detection device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a rubber tire type vehicle that travels on a track, and uses a leaky coaxial cable as a track as a transmission line connecting the ground and the top of the vehicle, which is necessary for detecting the position of the vehicle. The present invention relates to a vehicle position detection device when installed along a line.

[Technical background of the invention and its problems]

FIG. 4 shows a conventional example of the above-mentioned vehicle position detection method when a block section in a station and a section between stations is divided.

In FIG. 4 (b), 100u, 100v, 100w ... Are leaky coaxial cables laid in each block section on the track.
Of these, for example, looking at the vehicle detection method for the leaky coaxial cable 100v in a certain block section, the unique number signal l _n sent from the vehicle position detection logic unit 210v
After modulating through 201v, give it to transmitter 202v, and
The transmitter 202v puts it on the carrier wave ₁ and sends it to one end of the leaky coaxial cable 100v. The signal sent to the leaky coaxial cable 100v is received by the inspection receiver 203v connected to the other end when it reaches the other end through the coaxial cable 100v, and from the carrier wave ₁ by the inspection receiver 203v. It is converted into a unique number signal l _n and given to the verification transmitter 204v. The transmitter for verification 204v puts the input unique number signal l _n on the carrier wave ₁ ′ and passes it through the attenuator 205v to generate the carrier wave ₁ ′.
Weaken and send again to the leaky coaxial cable 100v in the opposite direction to the above. 'Uptake receiver 206v and carrier _1' The returned carrier ₁ in the case where the vehicle 10 is not on leaky coaxial cable 100v except demodulates the signal component via the modem 201v, unique number signal l _n To the position detection logic unit 210v for detecting the position of the vehicle. Then, the position detecting logic unit 210v constantly checks the disconnection of the leaky coaxial cable or the like. On the other hand, when the vehicle 10 is present as shown in FIG. 4 (b), on the vehicle 10 side, the on-board receiver 12 receives the carrier wave ₁ transmitted from the above-mentioned transmitter 202v through the receiving antenna 11. Then, after the carrier wave ₁ is removed here, the unique number l _n is demodulated through the onboard modem 15 and sent to the onboard controller 16. Although not described in detail here, the on-board controller 16 transmits a signal l _n ′, which is an identification number signal to the unique number signal received from the ground as a transmission signal from the vehicle to the ground, to the on-board modem.
It has a function to be applied to the on-board transmitter 13 after being modulated via 15. The signal passed through the on-board transmitter 13 is sent on the leaky coaxial cable 100v on the carrier wave ₁ '.
Leakage coaxial cable 100v is received by the aforementioned Shosa receiver 203V, and the carrier ₁ 'in Shosa transmitter 204v
Carrier that was put on the board, weakened by the attenuator 205v, and returned
'There is, carrier ₁ from the which the car' ₁ overlaps the carrier ₁ ', _1' are both to be FM-modulated, on-board transmitter
Strong carrier ₁ from 13 'is weak carrier ₁ from Shosa transmitter 204V' suppressing. Therefore, the receiver 206v is 'will receive a position detection logic 210v of the vehicle signal l _n from the vehicle obtained by adding identification bit unique ID signal' carrier ₁ from the drive from the contents of the It is distinguished from the signal l _n from the verification transmitter 204v.

When the vehicle 10 moves and the receiving antenna 11 enters the leaky coaxial cable 100w, the vehicle 10 receives the unique number signal l _{n + 1} from the vehicle position detecting logic unit 210w on the coaxial cable 100w. Then, from the vehicle 10, a signal obtained by adding an identification bit to the unique number signal l _{n + 1} is transmitted to the leaky coaxial cable 100v,
When this is detected by the position detecting logic unit 210v, the position detecting logic unit 210v informs the position detecting logic unit 210v of the vehicle of the presence of the vehicle through the signal line 220vw. When the vehicle 10 further moves and the transmitting antenna 14 enters the leaky coaxial cable 100w, the vehicle position detecting logic unit 210w starts receiving the unique number signal l _{n + 1} . Then, the vehicle position detection logic unit 210w on the side of the leaky coaxial cable 100w sends a signal to the vehicle position detection logic unit 210v to reset the presence of the vehicle on the leaky coaxial cable 100v through the signal line 220vw to reset.

The conventional one is such a system, and in order to allow the vehicle to safely travel on the track, the speed limit signal in the block section corresponding to the above detected position is continuously connected from the ground to the vehicle in the block section unit. It is sent out to control the speed. Generally, the maximum speed limit of a traveling vehicle is determined by the gradient on the track and the curve conditions.

Therefore, as shown in Fig. 4 (a), it is rare to be controlled by the operation curve I that matches the speed limits V1 and VF of the station S and the inter-station part, and usually one or more speed limit sections are provided between the stations. Is the one that exists.

Now, when the speed limiting section V2 is provided in the middle of the speed limiting section VF of FIG. 4 (a) as shown in FIG. 5 (a), the block section is the leaky coaxial cable 10 of FIG. 4 (b).
It is general to divide the 0v section into three and to newly provide 100v ′, 100v ″. Therefore, the leaky coaxial cable 100v ′, 1
Transceiver 202v ', 202v ", 206v', 206 connected to 00v"
v ″, vehicle position detection logic units 210v ′, 201v ″, etc. are required, and it is disadvantageous in terms of cost to simply subdivide the block section and deal with it.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle that can easily and inexpensively detect a vehicle in a block section when a speed limit section is further provided in the block section. It is to provide a position detection device.

[Outline of Invention]

That is, in order to achieve the above-mentioned object, the present invention lays a leaky coaxial cable along a track on which the vehicle travels, detects the position of the vehicle by communicating with the vehicle through the leaky coaxial cable, and detects the position thereof. In a railway system that travels by giving a speed limit signal from the ground at the, a leaky coaxial cable dedicated to the speed limit section is installed separately from the leaky coaxial cable for blockage in the speed limit section arbitrarily provided in the block section. A leaky coaxial cable dedicated to the speed limit section is provided with a device that constantly sends a small verification signal and detects this signal to transmit and detect the verification signal, and the on-vehicle transmission antenna of the vehicle is dedicated to this speed restriction section. By utilizing the fact that the verification signal is suppressed by the on-vehicle transmission signal when it is located on the leaky coaxial cable, it becomes impossible to detect it. There so as to detect that the present, thereby allowing low cost configuration with a simple with the position of the vehicle at a speed limit zone can be reliably detected.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. The basic structure of the present invention is the same as that shown in FIGS.

FIG. 1 shows an example of a system configuration for explaining a vehicle position detection system according to the present invention. In FIG. 1, the devices designated by the same numbers as those in FIG. 4 are the same. First
In the figure, as in the case of FIG. 5, the leaky coaxial cable 10
If there is a speed limit section V2 in the block section where 0v is laid, the speed limit section V2 should be adjusted to match that section.
The leaky coaxial cable 110j is installed in the section set so that the entry side to V2 is set backward by the total length L1 and the deceleration distance L2 of the rolling stock, and the entry side is set shorter by the same length L1. And
A verification signal transmitter (hereinafter referred to as a dedicated transmitter) 302j dedicated to the speed limit section and a tone oscillator for dedicated verification (hereinafter referred to as a tone oscillator) 301j are connected to one end of the cable 110j. The other end of the leaky coaxial cable 110j is connected to the dedicated inspection signal receiver (hereinafter referred to as a dedicated receiver) 304j and the dedicated inspection tone receiver (hereinafter referred to as a tone receiver) 305j. Other configurations are the same as those in FIGS. 4 (b) and 5 (b).

Next, a position detecting operation of the vehicle 10 for the speed limited section will be described.

Outside the speed limit section, the position of the vehicle 10 is detected by the method described with reference to FIGS. 4 and 5, and a speed limit signal corresponding to the position is given from the ground to the vehicle 10 to drive at the speed limit. In the speed limit section, the tone oscillator 301j provided in the leaky coaxial cable 110j in this section generates the tone signal F1 and sends it to the dedicated transmitter 302j. Further, dedicated transmitter 302j sends modulates the only 'the same frequency ₁ and _1' carrier car on the transmitter 13 of the vehicle 10 at the transmission output passing through the leaky coaxial cable 110j to the leakage coaxial cable 110j. Now, assuming that the transmission antenna 14 of the vehicle 10 does not exist in the section of the leaky coaxial cable 110j, the dedicated transmitter 302j
Signal ₁ sent from the demodulating 'is the leakage dedicated receiver in 304j carrier ₁ and the coaxial cable 110j within reach the other end side through the' further detects the tone signal F1 now sent to the tone receiver 305j . With this, disconnection is always detected.

'Carrier ₁ from the exclusive transmitter 302j by' carrier ₁ transmitted and the transmission antenna 14 is present in the section of the leakage coaxial cable 110j from the onboard transmitter 13 of the vehicle 10 of the vehicle 10 contrary to the above Is suppressed and dedicated receiver 304
The signal demodulated by j is the tone signal F1 at the tone receiver 305j.
Becomes undetectable, and the presence of the vehicle 10 can be detected from this. Therefore, the undetectable state of the tone signal F1 can be used as the position detection signal of the vehicle 10.

Therefore, when the tone signal F1 cannot be detected, it is determined that the vehicle has entered the speed limit section and the vehicle 10 is given a speed limit signal of the speed limit V2 in this section from the ground to drive the vehicle. Of course, the tone oscillator and receiver could use multiple waves at the same time to improve reliability rather than one wave.

As described above, according to the present invention, a leaky coaxial cable is used as a position detecting transmission line that connects the ground and the vehicle, and a leaky coaxial cable dedicated to a speed limit section is provided separately from the block section to provide a small amount here. A signal is sent in advance, and when the vehicle enters the speed limit section, the signal transmitted from the onboard transmitter makes it impossible to detect the minute signal. Since the transmitter on the ground is unnecessary unlike the two-way communication with the vehicle such as the position detection device for the vehicle in the blocked section, the speed limit section is not required to be blocked in one of the blocked sections like the conventional method. It is possible to provide a vehicle position detection device dedicated to a speed-restricted section, which can be more economically and more easily realized than a device divided as one, and can surely detect the position of the vehicle on the ground side.

The present invention is not limited to the embodiments described above and shown in the drawings, but can be modified and implemented as appropriate without departing from the scope of the invention.

For example, as shown in Fig. 2, when there are two different speed limit sections in the block section LCX _n , two leaky coaxial cables LCX _m and LCX _l dedicated to the speed limit section are used as a block leaky coaxial cable. Will be installed separately. The leaky coaxial cable LCX _m is used for the speed limited V2 section, and the leaky coaxial cable LCX _l is used for the speed limited V3 section to detect the position of the vehicle. As a matter of course, if the speed limit V4 is further added to the speed limit V3 section, a leaky coaxial cable dedicated to the speed limit V4 section is added. In this way, if the speed limit section increases, a leaky coaxial cable can be added to cope with it.

Fig. 3 shows an effective method even when it crosses both the blocked sections LCX _n and LCX _{n + 1. In} this way, the leaked coaxial cable LCX _{m + 1} dedicated to the speed limit section is used as the blocked section LCX _n .
Velocity limit section V that differs in two places using the boundary of LCX _{n + 1}
Available for 2, V3.

〔The invention's effect〕

As described above in detail, according to the present invention, it is possible to provide a position detecting device for a rubber tire type railway vehicle which is economical, has a simple structure, and can surely detect the position.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a vehicle position detection device dedicated to a speed limit section according to the present invention, FIG. 2 is a diagram showing an example in which a plurality of leaky coaxial cables dedicated to a specific section are provided side by side, and FIG. FIG. 4 is a diagram showing an example in which a leaky coaxial cable dedicated to a specific section is laid across adjacent block sections, and FIGS. 4 and 5 are views for explaining a conventional example. 10 …… vehicle, 11 …… reception antenna, 14 …… transmission antenna, 12 …… vehicle receiver, 13 …… vehicle transmitter, 100v …… blocking section leaky coaxial cable, 202v, v ′, v ″ ...... Transmitter, 206v, v ′, v ″ …… Receiver, 301j …… Speed limit section exclusive tone oscillator for verification, 302j …… Speed limit section verification signal transmitter, 304j …… Speed restriction section verification signal Receiver, 30
5j …… Checking tone receiver for speed limit section, 110j …… Leakage coaxial cable for speed limit section, LCX _n , LCX _m , LCX _l ……
Leaky coaxial cable for speed limit section, 210v, v ′, v ″, w…
... A logic unit for detecting the position of the vehicle.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 60-238562 (JP, A) JP 61-178260 (JP, A) JP 60-259564 (JP, A)

Claims (1)

(57) [Claims] 1. A leaky coaxial cable is laid along a track along which the vehicle travels, and the vehicle is communicated through the leaky coaxial cable to detect the position of the vehicle and to output a speed limit signal at that position from the ground. In a railroad system to be given and run, a leaky coaxial cable for detecting a specific section is laid separately from the leaky coaxial cable in a specific section, and a leaky coaxial cable for detecting the specific section is always provided with a minute frequency of the same frequency as a transmission wave from a vehicle A check signal is transmitted, and the check signal is provided by providing a detecting device, and when the vehicle enters a specific section, the check signal is suppressed by the transmission wave from the vehicle and is interrupted. A position detecting device for a vehicle, wherein the position of the vehicle in the specific section is detected.