JP2664622B2 - Non-contact automatic ticket gate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact automatic ticket gate, and more particularly to an improved transmitter capable of preventing interference.

[0002]

2. Description of the Related Art Automatic ticket gates, which are frequently used at present, are constructed such that a ticket or a commuter pass is inserted into a main body of the automatic ticket gate to perform an automatic ticket gate. However, this insertion-type automatic ticket gate has a problem that a commuter pass user needs to put a commuter pass in and out of a commuter pass every time the commuter pass passes through a ticket gate.

[0003] Therefore, in order to solve such a problem, data is transmitted and received between the main body of the automatic ticket gate and the commuter pass (card) in a non-contact manner, and the periodic main body of the automatic ticket gate is periodically transmitted to the main body of the automatic ticket gate. A non-contact automatic ticket gate capable of performing an automatic ticket gate without inserting a ticket has been proposed.
-246687).

[0004] By the way, many automatic ticket gates are installed side by side at a ticket gate of a station for the convenience of users.
It is conceivable that the present invention is similarly employed in a non-contact automatic ticket gate.

[0005]

However, when a large number of non-contact automatic ticket gates are juxtaposed, the frequency of radio waves emitted from the main bodies of the non-contact automatic ticket gates (hereinafter referred to as the main units) is increased. If they are different, there is a concern about a reception failure that a signal from the card cannot be accurately received.

[0006] To further explain the above concerns,
A transmitter having an antenna is provided, and a predetermined frequency (for example, 2.45 GHz) is set for the card side.
Is emitting radio waves.

On the other hand, when the card C receives the signal from the main body, the card C modulates the received radio wave with the data signal of the boarding section and the like stored in the card and returns the signal to the transmitter as a reflected radio wave. Is sending data.

In the case where a plurality of main units are arranged side by side, if there is a difference between the radio wave frequencies emitted from the respective main units, radio wave interference occurs, that is, a new signal having a frequency corresponding to the difference between the frequencies. A beat signal is generated.

If the frequency of the above-mentioned beat signal is largely different from the frequency reflected from the card C, it can be separated by the filter circuit, so that the above-mentioned problem of reception failure does not occur. If the frequencies are similar, the data signal frequency band and the beat signal frequency band when demodulating the data signal from the radio wave reflected by the card will be the same band, and it will be impossible to accurately demodulate the data signal.

In order to solve such a problem, the frequencies of the oscillators of the transmitters of the main units are adjusted in advance, that is, the frequency of the beat signal is adjusted so as to be distinguishable from the frequency of the card. Is also conceivable.

[0011] However, such frequency adjustment increases the cost because the oscillation frequency of the oscillator must be changed for each main body, and the occupied frequency band becomes wide when many automatic ticket gates are installed. This limits the number of installed devices.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a non-contact automatic ticket gate without reception problems.

[0013]

In order to achieve the above object, a non-contact automatic ticket gate according to the present invention transmits and receives data between a radio transmitter provided in a main body and a card in a non-contact manner. In the non-contact automatic ticket gate that performs automatic ticket inspection, the oscillator for generating a signal of a predetermined frequency of the transmitter is connected to the oscillator of the transmitter of the adjacent non-contact automatic ticket gate via a coupler. It is characterized by having.

[0014]

In the above configuration, the oscillators of the transmitters of the main bodies are connected to each other via the coupler, so that they are maintained at the same frequency. Therefore, since the generation of the beat signal is controlled, there is no mixing with the signal from the card, and the reception failure is effectively prevented.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a plurality of (four in the illustrated example) main bodies G ₁ , G
Is a plan view of _{the 2} ... a juxtaposed, Fig. 2, of a perspective view of the main body G _1.

Since the main bodies G _{1 to} G ₄ have the same structure,
For the body G ₁ will be explained. Body G _1, the door 1a for opening and closing the wicket passage P on the side surfaces of the front and rear of the housing H,
1b, a display unit 2 is provided on the front and back surfaces of the housing H for displaying the passable direction to the user A.
Further, a communication area 3 for transmitting and receiving data by wireless communication with a non-contact type card C held by the user is provided at the upper part of the front part and the rear part of the housing H. In these communication areas 3, antennas a, a connected to a transmitter described later are respectively exposed.

S is a human detector for detecting the entrance of the user A into the ticket gate P, the exit from the ticket gate P, or the passage, and is attached to the side surface of the housing H and the arm 4. . Speakers 5 for broadcasting predetermined guidance to the user A are attached to both side surfaces of the housing H.

[0018] 6, this is Nikki by controller Tsukasa the operation of the main body G _1, be constituted by using a microcomputer, the electrical configuration is shown in Figure 3. The central processing unit (CPU) 11 of the controller 6 performs arithmetic control processing using program data stored in the ROM 12 and working data stored in the RAM 13. This C
Each door 1a, 1 is connected to the PU via the I / O unit 14.
b, a lamp driver 16 for controlling lighting of the lamp of the display unit 2, an amplifier 17 for amplifying and taking in the detection signal of the human detector s, and the speaker 5
And a transmitter T for transmitting and receiving data to and from the card C are connected.

[0019] The transmitter T is configured by the controller 6 and another microcomputer, as in the known noncontact automatic ticket gate of station name from the body G ₁ to the card C via the antenna a and the day date, etc. In addition to transmitting the radio wave modulated by the data, the radio wave reflected by the card C is received, and the data of the boarding section and the like transmitted from the card is demodulated.

Next, the electrical configuration of the card C will be described.
This card C has an antenna 20 and a transmitter T of the main body G ₁ similarly to a normal IC card having a communication function.
A communication control unit 21 having the same functions as the above, an I / O unit 22, a CPU 23, a memory 24 including a ROM and a RAM, and a power supply 25. The power supply 25
Itself and not in the interior of the card C, may be the power supply receiving power wave supplied from the main body G _1.

FIG. 4 is a block diagram showing a schematic configuration of the transmitters T, T... Provided in the main bodies G ₁ , G ₂ . Since the transmitters T ₁ , T _2, ... Are the same, the transmitter T ₁ of the main body G ₁ will be described as an example.

The transmitter T ₁ has an oscillator (corresponding to the oscillating means of the present invention) 30 for generating a signal of a predetermined frequency (for example, 2.45 GHz).
The signal generated here is transmitted to an antenna a via a circulator 32 and a coupler 31 comprising a well-known directional coupler.
Is configured to be supplied.

The antenna a is configured to receive the radio wave reflected by the card C, and the signal is taken from the circulator 32 to the receiving unit 33.

The receiving section 33 processes the signal from the circulator 32 by a detection circuit 33a and a filter circuit 33b, and then demodulates the signal by a demodulation circuit 33c to extract a received signal. The extracted signal is sent to a signal processing circuit 33d. It is configured to send. Then, the received signal from the signal processing circuit 33d is sent to the controller 6 of the main body G _1, it is subjected to computation of the automatic ticket gate process.

The transmitter T ₁ has a main body G ₁
, And a transmission unit for transmitting entry and exit data to be transmitted to the card C, but is omitted because it does not directly relate to the description of the present invention.

The couplers 31 are provided in the transmitters T _{2 to} T _n of the other main bodies G _{2 to} G _n.
(Not shown), a connection line L such as a coaxial cable for high-frequency signals, and circulators 40, 40,. Therefore, each transmitter T _1-
T _n of the oscillator 30,30 ... (T ₂ ~T _n is not shown)
Complement each other and have the same frequency.

For this reason, the frequencies of the signals emitted from the antennas a, a,... Of each of the main bodies G _{1 to} G _n are the same, and the generation of the beat signal is effectively suppressed. Therefore, a reception failure can be prevented beforehand.

[0028]

The non-contact automatic ticket gate according to the present invention is a non-contact automatic ticket gate that performs non-contact data transfer between a wireless transmitter provided in a main body and a card without contact. In the machine, the oscillating means for generating a signal of a predetermined frequency of the transmitter is connected to the oscillating means of the transmitter of the adjacent non-contact automatic ticket gate via a coupler, so that generation of a beat signal can be suppressed, Reception failure can be prevented beforehand.

[Brief description of the drawings]

FIG. 1 is a plan view when a large number of main bodies are arranged side by side.

FIG. 2 is a perspective view of a main body.

FIG. 3 is a block diagram illustrating an electrical configuration of a main body and a card.

FIG. 4 is a schematic configuration diagram showing a connection state of each transmitter.

[Explanation of symbols]

G _{1 to} G _n main body (main body of non-contact automatic ticket gate) a antenna 6 controller 30 oscillator (oscillation means) 31 coupler 40 circulator C card T transmitter L connection line

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenichi Konno 4-72 Miyagaya Tower, Omiya City, Saitama Prefecture Antenna Giken Co., Ltd. (56) References JP-A-4-280396 (JP, A)

Claims (1)

(57) [Claims] 1. A non-contact automatic ticket gate that automatically exchanges data by transmitting and receiving data without contact between a wireless transmitter and a card provided in a main body of the non-contact automatic ticket gate. Wherein the oscillating means for generating the signal of the predetermined frequency is connected to the oscillating means of the transmitter of the adjacent non-contact automatic ticket gate via a coupler.