JP2555248Y2 - Transponder device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transponder device, and more particularly to a transponder device suitable for train communication.

[0002]

2. Description of the Related Art Conventionally, as a transponder device for train communication, a train has a power wave generator for generating a power wave of a predetermined frequency (245 kHz), and has an antenna for transmitting the power wave. On the ground side, a coil for receiving the power wave transmitted from the train side is provided, and a rectifier for rectifying the AC signal received by the coil is provided as a power source for the transmitter provided on the ground side. . Therefore, the transmitter is supplied with power when the train passes, operates, and can transmit data such as security information set in the transmitter to the train side.

[0003]

However, in the above-mentioned conventional transponder device, the power wave transmitted from the power wave supply device provided on one side which is relatively moved is received by the coil provided on the other side. Because we are doing
The higher the relative movement speed, the shorter the power receiving time. For example, in the case of a train communication transponder device,
When the train speed is increased, the operation time of the transmitter on the ground side is shortened, and there is a possibility that necessary data cannot be transmitted to the vehicle.

In order to meet the above-mentioned drawbacks and demands, it is conceivable that the length of a coil provided along the traveling direction of a train is made longer than before. Cannot be adopted because of the disadvantage that stable operation cannot be obtained. That is,
Power reception by the coil is performed in a resonance state. In order to stably perform the resonance state, it is necessary to reduce the inductance of the coil to a certain value or less. The reason is that when the length of the coil is increased and the inductance L is increased, Q (= 1 / R ◆ L / C) of the resonance circuit is increased. In this case, a high voltage is obtained, but the resonance frequency band is small. A stable predetermined voltage cannot be obtained. Further, when the length of the coil is increased, the capacitance between the coils increases, and the capacitance changes with temperature, so that a stable resonance state cannot be obtained. In contrast,
As before, if the length of the coil is short, the inductance is small, and therefore Q is small, but has a wide resonance frequency band and the voltage is low, but a stable voltage sufficient to drive the transmitter is obtained. It is possible.

[0005] Therefore, the present invention is to solve the above-mentioned drawbacks, also was made in order to meet the demand, the objective is a stable power supply by increasing the supply time of the power wave to the coil An object of the present invention is to provide a transponder device obtained over a long period of time .

[0006]

In order to achieve the above-mentioned object, the present invention provides a power wave transmitted from a power wave generator provided on one side which is relatively moved and provided on the other side. was received by the coil, the transponder device to power source equipment is provided on the other side, the coil plurality arranged along the movement direction, a longer power wave reception time of the coil , For long periods of time
Is obtained .

[0007]

In the above construction, when the power wave transmitted from the power wave generator provided on one side relatively moved approaches the first coil provided on the other side, the power wave is received by the coil. When the power wave approaches the next coil, the power wave is received by the coil and supplied to the power source of the device. As described above, by dividing the coil into a plurality, the Q of each coil is suppressed to be low and stabilized, and the expansion of the total transmission range is realized.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an apparatus according to an embodiment, showing an example in which the present invention is applied to a grounding element of a train transmitter.

In FIG. 1, reference numerals 1a and 1b denote coils having a predetermined number of turns, similar to a conventional ground wire, and are arranged in parallel on the ground along a not-shown line (rail). The coils 1a and 1b are respectively provided with resonance capacitors C.sub.
It is connected to the rectifiers 2a and 2b via the C-maki. The rectifiers 2a and 2b are configured to rectify an AC signal input from the coils 1a and 1b with a diode rectifier and supply DC power to the transmitter 3.

The transmitter 3 is a well-known transmitter having an antenna 4 for transmitting to the train side (upper side of the train), and stores therein security information based on the installation position of the transmitter 3. . Note that the antenna 4 is actually provided with each coil 1a,
It is formed in a loop antenna wound around 1b.

Next, the operation of the apparatus of this embodiment will be described with reference to the time chart of FIG. Assuming that the train T is traveling in the direction of the arrow as shown in FIG. 3A, a power wave from a power wave generator mounted on the train T is transmitted from the antenna 5. Therefore, when the train T first approaches the coil 1a, the coil 1a, the capacitor C
The circuit including the resonance becomes a resonance state, and a DC voltage is output from the rectifier 2a as shown in FIG. 2B, and this DC voltage serves as a power source of the transmitter 3 to drive the transmitter 3.

When the transmitter 3 is driven, fixed information (security information) stored therein is transmitted to an on-board receiver (not shown) mounted on the train T via the antenna 4. You. When the train T passes through the position of the coil 1a, it comes to the coil 1b this time, so that DC power is supplied from the rectifier 2b to the transmitter 3 as shown in FIG. Accordingly, the transmitter 3 receives power supply for a long time until the train T passes through both the coils 1a and 1b, as shown in FIG. For this reason, predetermined information can be received from the ground side even if the train speed is high, and even if the amount of information is large, the information can be received on the vehicle side.

As described above, in this embodiment,
Coil 1 having a coil length that provides a stable power supply
Since the coils a and 1b are arranged side by side along the moving direction of the train, the time during which the coils can receive the power wave is lengthened by the length of the arranged coils, and a stable power supply to the transmitter 3 is provided for a long time.
It can supply me. Therefore, it is possible to sufficiently cope with an increase in the train speed or an increase in the amount of information from the ground side to the vehicle side.

In the above embodiment, two coils are arranged in parallel, but three or more coils may be arranged in parallel. Further, although the coil side is fixed, the case where the coil side is moved may be used.

[0015]

According to the device of the present invention, a plurality of coils having a coil length capable of obtaining a stable power supply are arranged in parallel along the moving direction. time can be received becomes longer, it can supply over a stable power supply to the device for a long time. Therefore, for example, it is possible to cope with an increase in train speed and also to cope with an increase in the amount of information.

[Brief description of the drawings]

FIG. 1 is a schematic structural view of an embodiment of the present invention;

FIG. 2 is a time chart showing an operation state.

[Explanation of symbols]

 1a, 1b Coil 3 Transmitter (equipment)

Claims (1)

(57) [Scope of request for utility model registration] A power wave transmitted from a power wave generator provided on one side, which is relatively moved, is received by a coil provided on the other side, and a power wave of a device provided on the other side is received. In a transponder device serving as a power source, a plurality of the coils are arranged side by side in the moving direction, a power wave receiving time of the coil is lengthened, and a power source of the device is extended for a long time.
A transponder device characterized by being obtained as follows.