JP2000071987A - Railway safety device by data carrier system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a railway safety device which can inexpensively transmit opening and closing data as to a gate door provided at a required position on a fence laid along a railway, to a monitoring part. SOLUTION: In a data carrier system in which a puerility of ID tags 1 are fixed and arranged to a plurality of sleepers 15 for supporting a railway 13, and when a specific one of the tags 1 is approached by a questioning means fixed to a vehicle running on the railway, this ID tag 1 is waked up so as to transmit signals between the questioning means, a digital input circuit is mounted onto each of the ID tags 1, and receives opening and closing signals from a gate door opening and closing switches 22 for detecting opening and closing of a gate door 20 provided to the fence at predetermined intervals through the intermediary of a wired communication means 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway security device using a data carrier system utilizing microwaves in a system including a track and vehicles running along the track.

[0002]

2. Description of the Related Art An individual object recognition system (hereinafter referred to as a data carrier system) includes an ID tag (a transponder) and its ID.
An interrogator (hereinafter, R / W) for reading / writing data of the individual information of the tag. Currently, the data carrier system is based on FA (Factory Automat).
ion), logistics, railway tickets, and supermarket price reading.

Here, an outline of a general data carrier system will be described. FIG. 4 is a block diagram showing a configuration of the data carrier system. In the figure, reference numeral 1 denotes an ID tag, which is mounted on an object to be recognized, is composed of a modulation / demodulation circuit 2, an antenna 3, an MPU circuit 4, a memory 5, and a built-in battery 6, and is transmitted from the R / W 7 itself. Are stored in the memory 5.

The R / W 7 includes a transmitting / receiving circuit 8, an antenna 9,
It comprises a modulation / demodulation circuit 10 and an MPU circuit 11, is connected to a host computer 12 via a communication line D3, receives a command from the host computer 12, and
It reads and writes data in the memory 5 in the tag 1. The host computer 12 controls the R / W 7 and collects and manages individual information data of a plurality of ID tags.

[0005] In the ID tag 1, the modulation / demodulation circuit 2 is an MP tag.
The signal transmitted from the U circuit 4 is modulated, transmitted as a signal wave by the antenna 3, the signal wave received by the antenna 3 is demodulated, and the received signal is transmitted to the MPU circuit 4. The MPU circuit 4 manages the transmission / reception data of the reception signal from the modulation / demodulation circuit 2 and the transmission signal to the modulation / demodulation circuit 2.

In the R / W 7, the transmission / reception circuit 8 transmits and receives a transmission wave and a reception wave in communication with the ID tag 1 to the antenna 9.
Is transmitted and received by The modulation / demodulation circuit 10 modulates a signal transmitted to the transmission / reception circuit 8 and demodulates a signal received from the transmission / reception circuit 8. MPU circuit 1
1 manages data to be transmitted and received and controls communication with the host computer 12.

Next, the operation of the ID tag 1 and the R / W 7 will be described. First, the host computer 12 transmits an instruction for writing or reading individual data to the R / W 7 via a signal line D3 controlled by, for example, the RS232C standard. Next, when a signal from the host computer 12 is received,
The R / W 7 converts the instruction data to ASK (Amplitude).
(Shift Keying) modulated transmission wave RD10
To the ID tag 1 which is the object to be recognized.

When the modulation / demodulation circuit 2 receives the command data from the R / W 7, the MPU circuit 4 of the ID tag 1
It starts up from the sleep mode in which the circuit is not operating, and decodes the instruction data received and demodulated by the modulation / demodulation circuit 2. Next, the MPU circuit 4 reads or writes data stored in the memory 5 in accordance with the decoded read or write command.

Next, the MPU circuit 4 sends an end signal to the modem circuit 2 after the data processing is completed, and the modem circuit 2
The end signal is sent to FSK (Frequency Shift).
Keying) modulation and BPSK (Binary P)
H. Shift Shift Keying) modulation.
/ W7 by the antenna 3 as a transmission wave TD10.

Here, as a medium for data communication for reading and writing the individual information data between the ID tag 1 and the R / W 7, for example, a microwave of 2.45 GHz is used.

As an application example of such a data carrier system, an attempt has been made to collect information necessary for safe driving of a system including a track and vehicles running along the track. In FIG. 5, 13 is a track, and 14 is a vehicle traveling on this track. Reference numeral 7 denotes an R / W fixed to the bottom of the vehicle 4. FIG. 6 is a plan view of the track 13.
Tag 1 on sleepers 15a, 15b, 15c ... supporting track 13
The configuration in which a, 1b, 1c... are fixedly arranged is shown.

The R / W 7 mounted on the vehicle 14 is the vehicle 1
4 is supplied from a suitable power supply in the host computer 1
2 is also arranged in the vehicle 14. In such a configuration, when the vehicle 14 travels on the track 13, the R / W 7
.. Sequentially pass in the vicinity of the ID tags 1a, 1b, 1c... Fixed to the sleepers 15a, 15b and 15c, respectively. Communication is performed with the. Information obtained by the data collection system having such a configuration is specific point information (distance from the specific point, gradient, track keeping history, etc.) stored in the memory of the ID tag 1 in advance.

[0013]

In a high-speed train system, such as a bullet train, a fence such as a wire mesh is installed along a track in order to prevent a person other than security personnel from entering a track. Often. Key points on the fence are provided with gates, which are usually locked and kept inaccessible only to staff. However,
In the event that an intruder breaks the key and opens the gate, the control department must be able to reliably detect this information, but it provides a means to inexpensively transmit signals over hundreds of kilometers. Not. The present invention has been made under such a background, and to provide a railway security device capable of inexpensively transmitting information on opening and closing of a gate installed at a key point of a fence constructed along a track to a monitoring department. With the goal.

[0014]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and has the first feature of its structure.
Consists of a plurality of ID tag means fixedly arranged on a plurality of sleepers supporting a track, and one interrogator means fixed to a vehicle traveling on the track.
It is arranged so as to sequentially pass through the vicinity of the ID tag means while approaching the D tag means by a predetermined distance, and when the interrogator means approaches the specific ID tag means, a signal from the interrogator means makes the specific In a data carrier system in which ID tag means is woken up and executes communication with the interrogator means, a digital input circuit formed in the ID tag means and a predetermined portion of a fence arranged along the track And switch means for detecting the opening and closing of the gate, and a wire means for guiding the opening and closing signal of the switch means to a digital input circuit formed in the ID tag means near the gate. A second feature is that communication between the ID tag means and the interrogator means is realized by microwaves.

[0015]

Embodiments of the present invention will be described below in more detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a data carrier system used in the present invention. The same elements as those of the conventional configuration described with reference to FIG. Will be described.

In the ID tag 1, reference numeral 16 denotes an additional digital input circuit which inputs a binary signal of a contact 17 of a gate opening / closing switch means 22 (FIG. 2) which operates by opening / closing of the gate via a wired means 18. , The on / off state of the MPU
The data is stored in the memory 5 via the circuit 4.

As described above, the MPU circuit 4 is in a sleep state in order to prevent battery consumption when the wake-up by the R / W 7 is not performed as described above, so that the output of the digital input circuit 16 is output from the MPU circuit 4. The MPU circuit 4 is connected to the interrupt terminal of
To wake up (battery on).

FIG. 2 is an overall conceptual view of the security device of the present invention, and 19 is a fence constructed along the track 13, 20.
Is an opening / closing door provided at a key point of the fence. Reference numeral 21 denotes locking means for the opening / closing door, and reference numeral 22 denotes a gate opening / closing switch means that is turned on / off by opening and closing the door. This gate opening / closing switch means 22
The contact signal by the ON / OFF of the ID tag 1 is attached to the sleeper 15 near the opening / closing door 20 via the wired means 18.
To the digital input circuit 16.

FIG. 3 shows a configuration example of the ID tag 1 having the digital input circuit 16 built therein. Since the ID tag 1 has a built-in battery 6 and does not require external power supply, the ID tag 1 is housed in a protective housing made of an appropriate resin, and the protective housing is fixed to a sleeper 15 (FIG. 2). . 3A is a plan view as viewed from above, FIG. 3B is a cross-sectional view, and FIG. 3C is a side cross-sectional view.

Reference numeral 23 denotes a housing member, on the bottom of which a recess for storing the tag 1 is formed. Reference numeral 24 denotes a bottom cover member for closing the opening of the recess after the tag 1 is stored in the recess. The attachment to the sleeper 15 can be performed using a suitable adhesive or bolt means.

Reference numeral 25 denotes a lead wire from the digital input circuit 16 which is drawn out through a hole formed at the bottom of the built-in ID tag 1 and is connected to the wired means 18 by the connector means 26. 27 and 28 are bottom cover materials 24
And a notch groove formed in the housing member 23, and is filled and sealed with a resin material or the like in a state where the lead wire 25 is housed.

In such a configuration, the R / W 7 mounted on the vehicle reads the contents of the memory 5 of the ID tag 1 while traveling, and reads the information indicating that the gate 20 is open when the R / W 7 reads the information indicating that the gate 20 is open. The number (location) is reported to the management department by existing communication means such as train radio.

[0023]

As described above, according to the present invention, the following effects can be expected. (1) By using an ID tag, the open / closed state of the gate can be monitored at low cost. (2) The ID tag stores the time when the gate is opened and closed (when an event occurs), that is, has a logging function, and this function is useful as analysis information in the event of any failure. (3) It is possible to reliably transmit information on a large number of gates installed over a long distance over several hundred kilometers to a management department without newly installing a special wired or wireless transmission means.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a configuration of an ID tag and an interrogator (R / W) forming a main part of a security device of the present invention.

FIG. 2 is an overall conceptual diagram of the security device of the present invention.

FIG. 3 is a configuration example in which an ID tag in the security device of the present invention is housed in a protective housing.

FIG. 4 is a block diagram showing an example of a configuration of an ID tag and an interrogator (R / W) of a conventional data carrier system.

FIG. 5 is a conceptual diagram of a conventional railway point information system using a data carrier system.

FIG. 6 is a plan view showing an installation relationship of an ID tag with respect to a railroad sleeper in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... ID tag 5 ... Memory 7 ... Interrogator means 12 ... Host computer 13 ... Track 15 ... Sleeper 16 ... Input circuit (digital input circuit) 17 ... Contact point of gate opening / closing switch means 18 ... Wire means 19 ... Fence 20 ... Gate 22 ... Gate opening / closing switch

Claims (2)

[Claims] 1. A vehicle comprising: a plurality of ID tag means fixedly arranged on a plurality of crossties supporting a track; and one interrogator means fixed to a vehicle traveling on the track, wherein the interrogator means comprises: It is arranged so as to sequentially pass near the ID tag means while approaching the ID tag means for a predetermined distance, and when the interrogator means approaches the specific ID tag means, the signal from the interrogator means makes the specific In a data carrier system in which ID tag means is woken up and executes communication with the interrogator means, a digital input circuit formed in the ID tag means, and a predetermined portion of a fence arranged along the track Switch means for detecting the opening / closing of a gate provided in the apparatus; and an opening / closing signal of the switch means for receiving the digital input signal formed on the ID tag means near the gate. A railway security device based on a data carrier system, comprising: a wired means for guiding to a road. 2. The railway security device according to claim 1, wherein the communication between the ID tag means and the interrogator means is realized by microwave.