JPH0721429A - Non contact type automatic ticket examination machine - Google Patents

Abstract

PURPOSE:To suppress the generation of a beat signal and to previously prevent the generation of a signal fault by connecting an oscillation means for generat ing a signal with prescribed frequency in a transmitter to an oscillation means in a transmitter in an adjacent automatic ticket examination machine through a coupler. CONSTITUTION:A transmitter T1 has an oscilltor 30 for generating a signal with prescribed frequency and the signal generated from the oscillator 30 is supplied to an antenna (a) through a coupler 31 and a ciriculator 32. The antenna (a) receives a radio wave projected from a card C and the received signal is inputted from the circulator 32 to a receiving part 33. The coupler 31 are mutually connected to couplers included in transmitters T2 to Tn in other machine bodies through connection line L such as a high frequency signal coaxial cable and circulators. Thereby oscillators 30 in respective transmitters T1 to Tn are mutually interpolated and set up to the same frequency. Thereby the frequency bands of signals radiated from antennas (a) in respective bodies are the same and the generation of a beat signal can be effectively suppressed.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art At present, an automatic ticket gate, which is widely used, is constructed so that a ticket or a commuter ticket 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 the commuter ticket user has to insert and remove the commuter ticket from the commuter ticket compartment each time the commuter ticket user passes through the ticket gate.

Therefore, in order to solve such a problem, data is exchanged between the main body of the automatic ticket gate and the commuter pass (card) in a non-contact manner so that the main body of the automatic ticket gate can be fixed. A non-contact type automatic ticket gate has been proposed which is capable of performing an automatic ticket gate without inserting a ticket (for example, Japanese Patent Laid-Open No. Hei 1
No. 246687).

By the way, many automatic ticket gates are installed at the ticket gates of stations for the convenience of users.
It can be considered that the same can be applied to a non-contact automatic ticket gate.

[0005]

However, when a large number of non-contact type automatic ticket gates are installed in parallel, the frequencies of radio waves emitted from the main bodies of the non-contact type automatic ticket gates (hereinafter referred to as the main body) are mutually different. If they are different, there is a fear of reception failure that the signal from the card cannot be received correctly.

To further explain the above-mentioned concerns,
A transmitter with an antenna is provided, and a predetermined frequency (for example, 2.45 GHz) is applied to the card side.
Is emitting radio waves.

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

By the way, when a plurality of main bodies are arranged side by side, if the radio frequencies emitted from the main bodies are different from each other, radio wave interference occurs, that is, a new signal having a frequency corresponding to the difference in the frequencies. A beat signal is generated.

If the frequency of the beat signal is significantly 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, but the frequency of the beat signal and the frequency of the card C are different. When the frequencies are close to each other, the data signal frequency band and the beat signal frequency band when demodulating the data signal from the radio wave reflected by the card are in the same band, which makes it impossible to accurately demodulate the data signal.

In order to solve such a problem, the frequencies of the oscillators of the transmitters of the respective main bodies are adjusted in advance, that is, the beat signal frequency is adjusted so as to be discriminated from the frequency of the card. Can also be considered.

However, such frequency adjustment requires a change in the oscillation frequency of the oscillator for each main body, which increases the cost, and when a large number of automatic ticket gates are installed, the occupied frequency band becomes wide, There will be restrictions on the number of devices that can be installed.

Therefore, the present invention has been made in order to solve the above problems, and an object thereof is to provide a non-contact type automatic ticket gate with no reception obstacle.

[0013]

In order to achieve the above object, a non-contact type automatic ticket gate according to the present invention transmits and receives data in a non-contact manner between a radio wave type transmitter provided in a main body and a card. In the non-contact automatic ticket gate that performs the automatic ticket gate, 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 through a coupler. It is characterized by

[0014]

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

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a plurality (four in the illustrated example) of main bodies G ₁ and G.
₂ is a plan view when _two ... Are arranged in parallel, and FIG. 2 is a perspective view of the main body G ₁ among them.

Since the main bodies G _{1 to} G ₄ have the same structure,
The main body G ₁ will be described. The main body G ₁ includes doors 1a for opening and closing the ticket gate passage P on the front and rear side surfaces of the housing H.
1b is provided, and a display unit 2 for displaying the passable direction to the user A is provided on the front and back of the housing H.
Further, a communication area 3 for transmitting and receiving data by wireless communication with a non-contact type card C carried by a user is provided at the upper part of the front part and the rear part of the housing H. Antennas a and a connected to a transmitter, which will be described later, are faced to these communication areas 3, respectively.

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

Reference numeral 6 denotes a controller for controlling the operation of the main body G ₁ , which is composed of a microcomputer, and its electric structure is shown in FIG. The central processing unit (CPU) 11 of the controller 6 performs arithmetic control processing using the program data stored in the ROM 12 and the working data stored in the RAM 13. This C
The PU is connected to each door 1a, 1 through the I / O unit 14.
a door driver 15 for driving b, a lamp driver 16 for controlling lighting of the lamp of the display unit 2, an amplifier 17 for amplifying and incorporating a detection signal of the human detector s, and a speaker 5
A voice driver 18 for driving the C and a transmitter T for transmitting and receiving data to and from the card C are connected.

The transmitter T is composed of a microcomputer other than the controller 6 and, like the well-known non-contact type automatic ticket gate, the main body G _{1 transfers the} card name C to the card C via the antenna a and the date of the day. It has a function of transmitting a radio wave modulated by the data of (1), receiving the radio wave reflected by the card C, and demodulating the data of the boarding section sent from the card.

Next, the electrical structure of the card C will be described.
This card C is similar to an ordinary IC card having a communication function, and includes an antenna 20 and a transmitter T of the main body G ₁ .
It has a communication control unit 21 having the same function 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. In addition, power supply 25
May be used as a power source by receiving the electric wave supplied from the main body G ₁ without having it inside the card C.

FIG. 4 is a block diagram showing a schematic structure 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 passes through a coupler 31 and a circulator 32, which are known directional couplers, to the antenna a.
Is configured to be supplied to.

The antenna a is constructed so as to be able to receive the radio wave reflected by the card C, and the signal thereof is arranged to be taken in from the circulator 32 to the receiving section 33.

The receiving unit 33 processes the signal from the circulator 32 by the detection circuit 33a and the filter circuit 33b, demodulates it by the demodulation circuit 33c, extracts the received signal, and outputs the extracted signal to the signal processing circuit 33d. It is configured to deliver. Then, the received signal from the signal processing circuit 33d is sent to the controller 6 of the main body G ₁ and used for calculation of the automatic ticket gate processing.

The transmitter T ₁ has a main body G ₁
Although a transmission unit for transmitting entry / exit data to be sent from the card to the card C is included, it is omitted because it is not directly related to the description of the present invention.

The coupler 31 is a coupler 31, 3 provided on the transmitters T _{2 to} T _n of the other bodies G _{2 to} G _n.
1 (not shown) and a connection line L such as a coaxial cable for high frequency signals and circulators 40, 40 ... Therefore, each transmitter T ₁ ~
T _n oscillators 30, 30 ... (T _{2 to} T _n are not shown)
Are complementary to each other and have the same frequency.

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

[0028]

The contactless automatic ticket gate according to the present invention is a contactless automatic ticket gate that performs contactless data transfer between a wireless transmitter provided on the main body and a card in a contactless manner. In the machine, since the oscillating means for generating the signal of the predetermined frequency of the transmitter is connected to the oscillating means of the transmitter of the adjacent non-contact type automatic ticket gate via the coupler, generation of the beat signal can be suppressed, It is possible to prevent reception failure.

[Brief description of drawings]

FIG. 1 is a plan view when a 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 showing 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 (oscillating means) 31 coupler 40 circulator C card T transmitter L connection line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenichi Konno 4-72 Miyagaya Tower, Omiya City, Saitama Prefecture Antenna Giken Co., Ltd.

Claims (1)

[Claims] 1. A non-contact automatic ticket gate for automatically transferring data by wirelessly transmitting and receiving data between a wireless transmitter provided in a main body of the contactless automatic ticket gate and a card. The non-contact automatic ticket gate, wherein the oscillating means for generating a signal of a predetermined frequency is connected to the oscillating means of the transmitter of the adjacent non-contact automatic ticket gate via a coupler.