JP2600608B2 - Non-contact type ID card reader - 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 ID card reader, and more particularly to a non-contact ID card reader used in an entrance / exit management system for distinguishing and managing visitors in each area.

[0002]

2. Description of the Related Art An entrance management system using a non-contact card reader device controls the opening and closing of a door by transmitting and receiving an identification code of an ID card by radio. The ID card used for this is an individual identification code,
That is, an IC card in which ID data is stored, which has an antenna unit for transmitting and receiving signals, an electronic circuit unit for storing ID data and processing signals, and a power supply unit.
Further, as shown in FIG.
An antenna unit 1 transmits and receives data to and from a D card at a carrier frequency fo, a signal processing unit 3 for transmitting and receiving data, and a gate opening and closing control unit 4 that controls opening and closing of a door 10 by the processed data.

The antenna unit 1 is usually provided in each of the two rooms so that the vicinity of the door 10 is an effective range for transmitting and receiving radio waves. In the conventional system in which the door opening process at the time of entry is controlled, the effective range of the radio wave is set to one of the areas (CC'DD ') or (DD'EE') corresponding to one room. An antenna unit having a single directivity has been used. In addition, as a system in which the opening of a door is restricted by one antenna even when leaving the room, the directivity of the antenna is changed from unidirectional to non-directional, and the effective range of one antenna is changed to the area on both sides of the door (CC'EE). The proposal to expand the scope of ') was disclosed by JP-A-1-245721. The antenna part of this device is composed of a rectangular radiation conductor and a ground conductor laminated with a dielectric material interposed therebetween, and a short-circuit plate between the radiation conductor and a ground conductor longer than the radiation conductor. Since the carrier wave is also radiated so as to go around to the ground conductor on the side without the radiation conductor, the carrier wave is radiated on both sides of the door near the antenna unit installation position.

The operation of these systems is as follows. When the user wants to open the door 10, the identification code is transmitted from the ID card in the shaded area (CC'EE '), which is the effective range for transmitting and receiving radio waves near the door, and the data is transmitted to the antenna unit 1.
To the signal processing unit 3 via The signal processing unit 3 analyzes the data and determines that the ID card is valid.
Instruct the opening / closing control unit 4 to open the door.

[0005] The method of transmitting the ID card data includes:
There is a method in which the power supply unit is turned on by the ID card itself to emit a radio wave, and a method in which the ID card is started from the card reader device side to transmit a transmission request signal of ID data, and the ID card responds to this.

[0006]

SUMMARY OF THE INVENTION The above-mentioned conventional non-contact I
In any of the D card reader devices, communication is performed between the ID card and the antenna unit of the device at a single frequency. Therefore, when a plurality of antenna units are provided on the device side, an antenna unit having a strong reception electric field strength from the ID card communicates with the ID card in a portion where the effective range of each antenna unit overlaps. Depending on the relationship between the antenna portions of both the ID card and the ID card reader device, such as the position and directivity, the correct position of the ID card in the area near the door where the radio wave effective ranges of the plurality of antenna portions overlap is determined. Indistinguishable, there was a risk of misidentifying visitors and exits.

However, when it is necessary to distinguish between the number of visitors and the number of exits for security confirmation, or to make the opening and closing direction of the door coincide with the direction of travel, for example, when it is necessary to distinguish between the number of visitors and the number of exits. There was a problem that accurate management was not possible.

An object of the present invention is to provide a non-contact type ID card reader device which can recognize the moving direction of a moving ID card when it is necessary to distinguish between an entering person and a leaving person.

[0009]

SUMMARY OF THE INVENTION A non-contact type ID according to the present invention
The card reader device is provided with at least two communicable frequencies, one of the frequencies is specified in advance, has an individual identification code and a frequency code corresponding to each of the given frequencies, and is designated. ID card means for transmitting an identification code and a frequency code according to the frequency,
Transmission request means for transmitting a transmission request signal of an identification code using a different frequency for each region; verification means for verifying the received identification code and frequency code with a predetermined value; and, if the verification results match, the identification code. And a frequency switching means for storing a frequency code and transmitting a frequency switching instruction signal to the ID card means.

It is desirable that the transmission request signal means transmits a transmission request signal to the ID card means by a polling method.

The contactless ID card reader according to the present invention compares the received identification code and frequency code with a predetermined value, and when the result of the comparison is identical, sends a frequency switching instruction signal to the ID card means. The present invention can be used for an entrance / exit management system that performs a door opening process.

[0012]

The ID card means switches to another frequency after the collation result matches at one frequency, and when reaching the overlapping portion of the effective range of the antenna section, the ID card means switches from the frequency area before switching to the current frequency area. It is determined that the vehicle is moving to the frequency range.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a system configuration according to one embodiment of the present invention.

This embodiment is an entrance / exit management system for two rooms 11 and 12 adjacent to each other via a door 10 and has ID codes and first and second two frequency codes f1 and f2. , A plurality of IDs having a function of transmitting ID data by adding one of the frequency codes designated in advance.
D card (not shown) and the area of the second room 12 (DD'B
B ′), an antenna unit 1 for transmitting radio waves at a frequency f1 to the first room 11 and transmitting / receiving data to / from an ID card, and an area (DD′AA ′) of the first room 11; An antenna unit 2 for transmitting radio waves at a frequency f1 to the second room 12 and transmitting and receiving data to and from an ID card in the second room 12 at a frequency f2 different from the frequency f1;
A non-contact ID card having a signal processing unit 3 that analyzes data received from an ID card by a polling method via a PID, sends an opening / closing instruction signal to a gate opening / closing control unit 4, and sends a frequency switching permission signal to the ID card. It is configured by the reader device 100.

Next, the operation of this embodiment will be described.

Now, it is assumed that the ID card designated to the frequency f1 is moving to enter the second room 12 having the carrier frequency f2 from the first room 11 having the carrier frequency f1.
This ID card is transmitted from the antenna unit 1 in the first room to t1.
A transmission request signal of ID data transmitted at the carrier frequency f1 at the time is received at a point K within an effective range of only the first frequency f1, and an ID including its own identification code and the frequency code of f1 is received.
The data is transmitted to the antenna unit 1 (time t2). The non-contact ID card reader 100 checks the ID data received by the antenna unit 1 against predetermined data, and if the identification code is correct and the frequency code is equal to the code of the carrier frequency f1 of the antenna unit 1, the The code of the frequency f1 and the ID data are stored, the opening / closing control section 4 is instructed to open the door, and a frequency switching instruction signal is transmitted to the ID card (at time t3). The ID card that has received the frequency switching instruction signal switches the frequency code to f2 (at time t4).
A transmission request signal for D data is received (at time t5). The signal processing unit recognizes that the ID card is moving from the room 11 to the room 12 by comparing the data stored at the time t3.

If the antenna unit 1 cannot receive the ID data transmitted from the ID card at the point K, the code collation of the frequency f2 of the antenna unit 2 performed at the point L does not match. Although not performed, in this embodiment, the polling performed by the antenna unit 1 at the time point t'1 causes the antenna unit 1 to reach the point L until the ID card reaches the point L.
Receives the ID data, the ID data is collated,
Opening processing and frequency code switching processing are performed.

[0019]

As described above, the present invention provides the ID card with at least two different communicable frequencies for each area, which are different for each area, and uses the first frequency in the first frequency area. Performs polling of an identification code transmission request, compares the identification code and frequency received from the ID card responding to the polling with a predetermined value, and stores the identification code and frequency code when the matched values match, and Is performed, and the ID card is instructed to switch to a second frequency different from the first frequency.
There is an effect that the moving direction of the moving ID card can be correctly recognized.

Further, when the non-contact ID card reader of the present invention is used in an entrance / exit management system, there is an effect that an attendee and an exit can be correctly distinguished.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 is a time chart of the system of FIG. 1;

FIG. 3 is a block diagram illustrating a configuration example of a conventional entry management system.

[Explanation of symbols]

 1, 2 antenna section 3 signal processing section 4 opening / closing control section 10 door 11, 12 room 100 card reader device

Claims (4)

(57) [Claims] 1. A processing method for a non-contact type ID card reader device capable of transmitting and receiving data by radio waves of a radio frequency with an ID card having a built-in individual identification code, wherein at least the first and second radio frequencies are used as the radio frequency. Setting one frequency, polling the ID card in the first area from the ID card reader device for a transmission request at a first frequency among the set frequencies, and responding to the polling with a first frequency. I specified for the frequency of
The identification code and frequency information received from the D card are collated with a predetermined value. When the collated values match, the identification code and the frequency code are stored and subjected to predetermined processing. A processing method for a non-contact ID card reader device, wherein an instruction to switch to a second frequency different from the set first frequency is issued. 2. A non-contact type ID card reader device capable of transmitting and receiving data by radio waves of a radio frequency with an ID card having a built-in individual identification code, wherein the individual identification code and one frequency are designated in advance. ID card means having at least a first and second two communicable frequencies and a frequency code corresponding to each of the frequencies, and transmitting the identification code and the frequency code by the designated one frequency; Transmission request means for transmitting a transmission request signal of an identification code and a frequency code using a different frequency for each region; verification means for verifying the received identification code and the frequency code with a predetermined value; Switching instruction means for storing the identification code and the frequency code and transmitting a frequency switching instruction signal to the ID card means. Contactless ID card reader device to. 3. The non-contact type ID card reader according to claim 2, wherein the transmission request signal means transmits a transmission request signal to the ID card means by a polling method. 4. An entrance / exit management system for transmitting a frequency switching instruction signal to the ID card means and performing a door opening process when the received identification code and the frequency code are compared with a predetermined value and the results of the comparison match. Claim 2 used for
Or a non-contact type ID card reader device according to item 3.