JPH0644487A - Traveling object identification device - Google Patents

Abstract

PURPOSE:To provide a traveling object identification device for which deceleration down to a speed communicable between a responsor and an interrogator while a high-speed traveling object retaining the responsor passes through the communication area of the fixed interrogator is not necessitated in a system for identifying the high-speed traveling object. CONSTITUTION:This device is composed of the responsor 2 in an intermittent reception state retained by the high-speed traveling object 1 and the interrogator 4 for reading information without contacting from the responsor 2' in a continuous reception state retained by the high-speed traveling object 1' after a certain period of time and the interrogator 3 for starting for transmitting signals for starting the responsor 2 from the intermittent reception state to the continuous reception state so that the responsor proceeds to the continuous reception state in the communication area of the interrogator 4 is provided separately from the interrogator 4 for communication. Thus, the responsor 2' is in the continuous reception state when passing through the communication area of the interrogator 4 and the failure of the communication does not occur even when the high-speed traveling object passes through while maintaing the high speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transponder held in a high-speed moving body by reading the identification number of the transponder by using a non-contact communication means such as radio waves from an interrogator, The present invention relates to a mobile body identification device that writes data, and is used, for example, in a system that manages operations by identifying trains, and a system that automatically identifies gates for cars that pass through toll roads by identifying cars. It is what is done.

[0002]

2. Description of the Related Art Conventionally, with respect to a transponder held in a moving body, an identification number of the transponder is read or data is written to the transponder by using a non-contact communication means such as radio waves from an interrogator. A moving body identification device is known.

FIG. 3 shows a schematic structure of a conventional moving body identifying apparatus. In the figure, A is an interrogator, B is a responder,
q is an inquiry signal and a is a response signal. In the interrogator A, A1 is a data control / processing circuit, A2 is a modulator, and A3.
Is a demodulator, A4 is a transmitting antenna, A5 is a receiving antenna,
A6 is a receiving amplifier.

In the responder B, B1 is a data control / processing circuit, B2 is a modulator, B3 is a demodulator, B4 is a transmitting antenna, B5 is a receiving antenna, and B6 is a receiving amplifier.
Since the transponder B is normally operated by the built-in battery,
In order to reduce the power consumption, it is in an intermittent reception state during non-communication, and when the transmission signal from the interrogator A is detected, it is configured to shift to a continuous reception state for a certain period of time. After the communication with the interrogator A is completed, the mode shifts to the intermittent reception state again.

Utilizing such a moving body identifying apparatus, a high-speed moving body has a transponder, communicates with a fixed interrogator, and identifies a train number to manage a system or an automobile. A system and the like for managing a vehicle passing through a toll road by identifying it have been proposed.

[0006]

As described above, in the conventional moving body identifying apparatus, in order to reduce the power consumption of the transponder, the transponder is in the intermittent reception state during non-communication and the interrogator is in use. After detecting the transmission signal from, the intermittent reception state is terminated and the continuous reception state is entered for a certain period of time.
Before the transition from the intermittent reception state to the continuous reception state is completed, the transponder held by the high-speed moving body may pass through the communicable area of the interrogator. In order to prevent such inconvenience, there is a problem that the high-speed moving object must decelerate to a communicable speed while passing through the communication area of the interrogator.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a system for identifying a high-speed moving object, wherein the high-speed moving object having a transponder is fixed. It is an object of the present invention to provide a mobile body identification device which does not need to decelerate to a speed at which communication can be performed between a responder and an interrogator while passing through a communication area of the interrogator being operated.

[0008]

In order to solve the above-mentioned problems, the moving body identifying apparatus according to the present invention is held by a high-speed moving body 1 moving in a certain direction as shown in FIG. The interrogator 4 is capable of contactlessly reading information from the transponder 2 in the intermittent reception state and the transponder 2'in the continuous reception state held by the high-speed moving body 1'after a certain time. A start-up interrogator capable of sending a signal for activating the intermittently-received transponder 2 from the discontinuous reception state to the continuous reception state so that the transponder shifts to the continuous reception state within the communication area 4 3 is provided separately from the transaction interrogator 4.

[0009]

In the system shown in FIG. 1, the responder 2'held in the high-speed moving body 1'and the interrogator 4 fixed for reading the information stored in the responder 2'in a contactless manner. And the interrogator 3 for activation that activates the transponder 2 during intermittent reception so that communication can be performed without slowing down the speed of the high-speed moving body 1 '.
Is provided. Therefore, the transponder 2'is in a continuous reception state when passing through the communication area of the interrogator 4, and communication failure does not occur even if the high-speed moving body 1'passes at high speed.

[0010]

FIG. 2 shows an embodiment in which the moving body identifying apparatus of the present invention is applied to a train operation management system. The train 5 is moving on the track 9 at a high speed in a certain direction. The train 5 has the transponder 6 in which the identification number peculiar to the train is written, and now, let's enter into the communication area of the interrogator 8 provided to read the written information in a contactless manner. I am trying. Before entering the communication area of the interrogator 8, a signal for activating the transponder 6 from the intermittent reception state to the continuous reception state is transmitted from the interrogator 7 for activation, and the transponder 6 performing the intermittent reception receives the signal. The signal is detected, and the intermittent reception state shifts to the continuous reception state. A read signal is sent from the interrogator 8 to the transponder 6 ′ that has transitioned to the continuous reception state,
It is possible to read the information related to the operation management such as the train identification number written in the transponder 6 ′ in a contactless manner while the vehicle is traveling at high speed.

The present invention can be applied to an automatic ticket gate system for toll roads and the like, in addition to the above-mentioned applications. When the mobile object identification device of the present invention is applied to an automatic ticket gate system on a highway, an automobile can pass through a toll gate without slowing down, so that traffic congestion and the like that occur near the toll gate can be alleviated. In addition, expressway use section (charge),
The vehicle number and the like can be read from the transponder possessed by the automobile.

[0012]

According to the moving body identifying apparatus of the present invention, the transponder held by the high-speed moving body is placed in the communication area of the interrogator installed to read the information written in the transponder. Since the interrogator for activation, which is provided separately from the interrogator for communication, is configured to activate from the intermittent reception state to the continuous reception state, the high-speed moving object does not slow down and remains in the high-speed communication area of the interrogator. The effect is that you can pass through.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of the present invention.

FIG. 2 is an explanatory diagram showing an embodiment in which the present invention is applied to a train operation management system.

FIG. 3 is a block diagram showing a schematic configuration of a conventional mobile body identification device.

[Explanation of symbols]

 1 High-speed moving body 1'High-speed moving body after a fixed time 2 Responder 2'Responder after a fixed time 3 Start-up interrogator 4 Communication trust interrogator

Claims (1)

[Claims] 1. A mobile body identification device comprising a transponder, which is held in a high-speed mobile body and is assigned a unique identification number, and an interrogator for reading the identification number of the transponder by using a non-contact communication means. A moving body identifying apparatus, wherein an interrogator for activation is provided separately from an interrogator for communication in order to preliminarily activate a responder in a receiving state before communication.