JP3346686B2 - Card reader and access control 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 card reader for reading personal identification information (hereinafter referred to as ID information) of a card in a non-contact manner, and performs entry / exit management based on the ID information read by the card reader. The present invention relates to an access control device.

[0002]

2. Description of the Related Art Conventionally, there has been an entry / exit management device which uses the above-mentioned card to enter / exit a building or a site, and manage entry / exit by floor, room, or designated area in the building. This entry / exit management device is mainly provided for a plurality of card readers and each card reader, and determines whether or not the ID information read by the card reader is registered in advance. When it is determined that the terminal is registered, the terminal control device performs unlocking control on the electric lock provided on the door and outputs an entry signal, and enters and exits based on the entry signal output from each terminal control device. And a management device for performing withdrawal management. Note that the card reader is mainly disposed on the entrance side of the room.

The reading of a card by a card reader is performed in a contact or non-contact manner, and a non-contact type is, for example, disclosed in JP-A-3-250881 or JP-A-3-228988.
As described in the issue, the card reader radiates electromagnetic waves, the energy of which generates an electromotive force in a coil in the card, and the power causes a control circuit in the card to operate to transmit ID information. is there. This type of card transmits ID information at regular intervals while an electromotive force is generated in the coil and the control circuit is operating, and ID information is transmitted each time a read command is transmitted from the card reader. Something to send.

[0004] Even if it is a non-contact type, it always operates with a built-in battery (for example, a paper battery), transmits ID information at regular intervals, or receives a read command from a card reader to read the ID. Some send information. On the other hand, in the contact type, a magnetic stripe is formed on a card, ID information is recorded on the magnetic stripe, and the ID information is read by a magnetic head of a card reader. The card reader supplies ID information read from the card to the terminal controller. The terminal control device determines whether the ID information read by the card reading device is registered in advance as described above, and determines that the ID information is registered. It performs unlock control and outputs a room entry signal.

[0005]

However, the above-mentioned conventional entry / exit management apparatus has the following problems. That is, while the ID information is being received from the card, the card reader outputs the data continuously or at regular intervals, which imposes a great burden on the management device. For this reason, the responsiveness of the management device is poor, and for example, it may not be possible to immediately respond to a request from another device.

Accordingly, an object of the present invention is to provide a card reading device and an entry / exit management device that can reduce the load on the data processing of the management device.

[0007]

To achieve the above object, according to the present invention, a card reader according to a first aspect of the present invention includes a receiving unit for receiving information, and a plurality of storage units for storing received information. Receiving information capturing means for capturing the information received by the receiving means at predetermined time intervals, and the number of the plurality of storage means each time the information received by the receiving means is captured by the receiving information capturing means. Storage control means for storing the received information in the plurality of storage means in the order from the latest to the oldest, and when the received information is stored in each of the plurality of storage means by the storage control means, all of the stored reception information A first method for determining whether or not there is a predetermined number or more of pieces of information indicating card ID information among the information
Determining means for receiving the ID information of the card in the plurality of storage means and determining that the received information indicating the ID information of the card is continuously equal to or more than a predetermined number. Is the same and different from the immediately preceding received information. A second determining means for determining whether or not the continuous received information is the same ID information by the second determining means And reception information output means for outputting any one of the continuous reception information when it is determined that the reception information is different from the immediately preceding reception information, and reception from the reception information output means. Re-output prohibiting means for prohibiting re-output of received information indicating the same ID information for a predetermined time after the information is output.

According to this configuration, each time the information received by the receiving means is fetched, the received information is stored in ascending order of the number of storage means from the newest one. Then, it is determined whether or not there is a predetermined number of consecutive pieces of ID information among the stored reception information. If it is determined that there are more than a predetermined number of consecutive pieces of ID information, the ID information is displayed. It is determined whether each of the received information is the same and different from the immediately preceding received information. In this determination, if it is determined that each of the received information indicating the ID information is the same and different from the immediately preceding received information, any one of the received information is output. The same reception information is not output for a predetermined time (1 second to 5 seconds) from the time when this reception information was output. Therefore, once the received information indicating the ID information is obtained and output, the received information indicating the same ID information is not output again, so that the number of data transmitted to the management device is reduced, and The load on the device is reduced and the response is improved.

According to a second aspect of the present invention, there is provided a card reading apparatus for identifying an ID from a card to the card reading apparatus according to the first aspect.
As information transmission, electromagnetic waves, infrared rays, or ultrasonic waves are used.

According to a third aspect of the present invention, there is provided an entry / exit management apparatus according to any one of the first to second aspects, a card for transmitting ID information, and reception information output from the card reader. And the received information is I
It is determined whether the information is D information and is registered in advance, and if it is determined that the information is ID information and is registered in advance, the electric lock or the like installed on the door is unlocked. A terminal control device that outputs data based on the ID information, and a management device that fetches data output from the terminal control device and performs entry / exit management.
According to this configuration, since the card reader is provided which does not output the received information indicating the same ID information again after the received information indicating the ID information is obtained and output once without fail. Since the number of data transmitted to the device is small and the load on the device is small, the responsiveness does not deteriorate.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. A. FIG. 1 is a block diagram showing a configuration of an embodiment of an entry / exit management device according to the present invention. In this figure, reference numeral 1 denotes a non-contact card reader, which alternately switches between a reception state and a transmission state at regular time intervals T1. In this case, the number of times that the reception information has been fetched for each fixed time T2 (T1 >> T2) during the reception period is determined, and when it is determined that the number is two or more, the oldest reception information and the latest consecutive same It is determined whether there is a difference between the received information and the content. When it is determined that there is a difference, the latest continuous reception information of the same content is transmitted to the terminal control device 4. Details of this processing will be described later.

The non-contact type card 2 generates an electromotive force by the energy of the electromagnetic wave from the card reader 1, reads out the ID information stored in the memory by the electric power, and transmits it. The terminal control device 4 determines whether or not the information received from the card reader 1 is ID information and whether or not the information is registered in advance. Door 5 via terminal information transmission path 3B
Is supplied to the electric lock 6 built-in. In addition, the terminal control device 4
Transmits an entry signal when the unlock signal is output, and transmits an exit signal to the transmission control device 8 via the trunk information transmission line 7 when the locking signal is output. Although one card reading device 1 is provided for one terminal control device 4 in the figure, the present invention is not limited to this, and one terminal control device 4 may be provided.
May be provided with a plurality of card readers 1.

The electric lock 6 drives a lock relay built in the door 5. When an unlock signal is supplied from the terminal control device 4, the electric lock 6 drives the lock relay in a direction to unlock the door 5. When the locking signal is supplied, the lock relay is driven in the locking direction. The transmission control device 8 transmits a signal from each terminal control device 4, a signal from various sensors 10 such as a fire detector and a gas leak detector to the central information processing device 11, and a signal from the central information processing device 11. Is transmitted to the terminal control device 4 or the like. Central information processing device 11
Performs entry / exit management based on an entry signal and an exit signal from each terminal control device 4, and performs processing such as an alarm based on an abnormal signal from various sensors 10.

B. Configuration of Card Reader 1 FIG. 2 is a block diagram showing a circuit configuration of the card reader 1. In this figure, reference numeral 20 denotes a CPU (central processing unit).
And controls each unit of the apparatus in accordance with a program stored in the ROM 21. The RAM 22 is a so-called work memory used in the operation of the CPU 20. This RA
Buffers A to D and a flag F described later are set in M22. An RF module 23 transmits and receives signals to and from the card 2 using electromagnetic waves. in this case,
Transmission and reception of a read command every fixed time T1 (ID transmitted from card 2 in response to this read command)
Information reception). This RF module 23
Is connected to an antenna 24. The antenna 24 is provided on the apparatus main body.

[0015] Configuration FIG. 3 RF modulator is a block diagram showing the configuration of an RF modulator 23. In this figure, 25 is an antenna switch,
The antenna 24 is switched to the receiving unit 26 or the transmitting unit 27 according to a switching signal from the controller 28. Receiver 26
Are the distributor 29 and the high frequency selection and amplification circuits 30A-3
0C, the window comparators 31A to 31C, and A
/ D converters 32A to 32C. The distributor 29 distributes the high-frequency signal captured by the antenna 24 to a plurality. The high frequency signal distributed by the distributor 29 is taken into the high frequency selection and amplification circuits 30A to 30C. The high frequency selecting and amplifying circuits 30A to 30C extract only a signal of a predetermined frequency, amplify and output.

The window comparators 31A to 31C extract a predetermined range level from the outputs of the high frequency selection and amplification circuits 30A to 30C. In this case, the outputs of the high-frequency selection and amplification circuits 30A to 30C are large, medium, and small by the window comparators 31A to 31C.
Retrieved in stages. That is, the window comparator 3
At 1A, the output of the small bell is extracted, at the window comparator 31B, the output of the medium level is extracted, and at the window comparator 31C, the output of the large level is extracted. The output of the high frequency selection and amplification circuit 30A extracted by the window comparator 31A is digitized by the A / D converter 32A, and the output of the high frequency selection and amplification circuit 30B extracted by the window comparator 31B is digitalized by the A / D converter 32B. Be transformed into The output of the high frequency selection and amplification circuit 30C extracted by the window comparator 31C is output to the A / D converter 32.
Digitized in C.

The controller 28 is connected to C via the bus BUS.
By inputting a control command from the PU 20, switching control for the antenna switch 25 is performed, and adjustment of the upper and lower limits of the window level of each of the window comparators 31A to 31C is performed. The transmission unit 27 is a bus B
When a read command from the CPU 20 is input via the US, the carrier is modulated by the read command and emitted to the air via the antenna 24. If the card 2 is within the transmission range of the read command,
ID information is transmitted from the card 2. In this case, if the card 2 is far, the reception output is small, and if the card 2 is near, the reception output is large. Therefore, the output from any one of the window comparators 31A to 31C depends on the size of the reception output at that time. Is obtained.

The upper and lower limits of the window levels of the window comparators 31A to 31C correspond to the detection areas a to c as shown in FIG. That is, the upper and lower limits of the window level of the window comparator 31A correspond to the detection area a, and the window comparator 31B
Corresponds to the detection area b. The upper and lower limits of the window level of the window comparator 31C correspond to the detection area c. When the CPU 20 receives information in any of the detection areas a to c for each reception information capturing period T2, the CPU 20 stores the received information in the buffer A. In this case, once the received information is stored in the buffer A,
After reading the received information stored in the buffer B and storing it in the buffer B, new received information is stored in the buffer A. afterwards,
Each time information is received, the received information stored in the buffer B is read and stored in the buffer C, and the received information stored in the buffer A is read and stored in the buffer B, and then new received information is stored in the buffer A.

Each time information is received, the CPU 20 determines whether or not the number of received information stored in the buffers A to C is two or more. If it is determined that the number is two or more, the CPU 20 outputs the received information. It is determined whether or not it is. That is, it is determined whether or not a condition (hereinafter, referred to as condition A) that "the contents of the buffer A and the contents of the buffer B are equal and the contents of the buffer B and the contents of the buffer C are not equal" is satisfied. When it is determined that the condition A is satisfied in this determination, the reception information stored in the buffer B is read out, stored in the buffer D, and transmitted to the terminal control device 4. On the other hand, condition A
Is not satisfied, storage in the buffer D and transmission to the terminal control device 4 are not performed.

Returning to FIG. 2, reference numeral 35 denotes a serial interface, which converts received information into serial data and outputs it. This data is sent to the terminal control device 4. .., A light emitting diode 37 is connected to each output terminal. Each light emitting diode 37 is in a power-on state, reads received information, and locks / locks the electric lock 6.
Displays the unlock status. Reference numeral 38 denotes a power supply unit, which generates a power supply used for the card reader 1. The RF module 23 corresponds to a receiving unit. Buffers A to C correspond to storage means. The CPU 20 and the RF module 23 constitute a reception information acquisition unit 100. CPU 20
Corresponds to a storage control unit, a first determination unit, a second determination unit, and a re-output prohibition unit. The CPU 20 and the serial interface 24 constitute a reception information output unit 110.
The central information processing device 11 corresponds to a management device.

C. Operation of Card Reader 1 FIGS. 5 and 6 are flowcharts showing the operation of the card reader 1. First, in step S10, it is determined whether the value of the flag F is "1". In this determination, when it is determined that the value of the flag F is “1”, the process proceeds to step S12, and when it is determined that the value of the flag F is not “1”, the process proceeds to step S14. This flag F is stored in buffers A to
It becomes “1” when two or more pieces of reception information are stored in C. It is determined that the value of the flag F is “1” and the process proceeds to step S
In step 12, it is determined whether or not two or more pieces of received information are stored in the buffers A to C. If it is determined in this determination that two or more pieces of reception information are not stored in the buffers A to C, the process proceeds to step S14.

If it is determined in step S14 that the value of the flag F is not "1" and that two or more pieces of received information are not stored in the buffers A to C, it is determined whether or not there is received information. In this case, it is determined that there is received information when any signal including noise or the like is received. If no signal is received, this step is repeated, and if any signal is received, the process proceeds to step S16. In step S16, it is determined whether the reception information is stored in the buffer A. In this determination, if it is determined that the reception information is not stored in the buffer A, step S1
Proceeding to step 8, the information received at the present time is stored in the buffer A. After this processing, the process returns to step S10.

On the other hand, if it is determined that the reception information is stored in the buffer A, the process proceeds to step S20, and it is determined whether the reception information is stored in the buffer B. In this determination, if it is determined that the reception information is not stored in the buffer B, the process proceeds to step S22, where the reception information stored in the buffer A is read and stored in the buffer B. Next, the process proceeds to step S24, where the information received at the present time is stored in the buffer B. After performing this process, the value of the flag F is set to “1” in step S26, and the process returns to step S10.

If it is determined in step S10 that the value of the flag F is "1", and if it is determined in step S12 that two or more received information is stored in the buffers A to C, step S34 ( Proceeding to FIG. 6), it is determined whether the received information stored in the buffer A and the received information stored in the buffer B are the same. In this determination, if it is determined that the reception information stored in the buffer A is not the same as the reception information stored in the buffer B, the process proceeds to step S36, the value of the flag F is set to "0", and the process returns to step S10. On the other hand, if it is determined that the reception information stored in the buffer A is the same as the reception information stored in the buffer B, the process proceeds to step S38.
To the reception information stored in the buffer B and the buffer C
Is determined whether the received information is different from the received information. In this determination, if it is determined that the received information stored in the buffer B and the received information stored in the buffer C are the same, the process proceeds to step S36, and if it is determined that they are different, the process proceeds to step S40.

When it is determined that the received information stored in the buffer B is different from the received information stored in the buffer C and the process proceeds to step S40, it is determined whether or not the received information is stored in the buffer D. If it is determined in this determination that the reception information is not stored in the buffer D, the process proceeds to step S42, and the reception information stored in the buffer B is stored in the buffer D. After performing this processing, step S
At 44, the received information stored in the buffer D is output. That is, the received information stored in the buffer D is transmitted to the terminal control device 4.
Transmit to If it is determined in step S40 that the reception information is stored in the buffer D, the process advances to step S46 to determine whether the reception information stored in the buffer D is the same as the reception information stored in the buffer B. Is determined. If it is determined in this determination that the received information stored in the buffer D and the received information stored in the buffer B are different, the process proceeds to step S42, and if it is determined that they are the same, the process proceeds to step S36. Thereafter, this flow is repeatedly executed for each period T2.

D. Specific Example of Operation of Card Reader 1 FIGS. 7 to 9 are diagrams showing specific examples of operation of the card reader 1. (A) In the case of single approach FIG. 7 is a diagram for explaining the operation in the case of single approach. In this case, it is assumed that ID information of “123” is stored in the card 2. (B) Unmanned state When the user holding the card 2 approaches the door 5, information is not received unless the card 2 has reached the detection area a. "0" will be stored. The card reader 1 always receives electromagnetic waves other than the electromagnetic waves from the card 2,
Since it is determined by a check code such as CRC whether the signal is a legitimate signal, "0" is stored in the buffers A to C except for the ID information.

(B) Approaching The user carrying the card 2 is approaching the door 5 and the detection area a
Is reached, the ID information (123) is received and stored in the buffer A. Then, when the user reaches the detection area b, reception of the ID information is performed. At this time, buffer A
Is read out and stored in the buffer B, and the ID information (123) received at the present time is stored in the buffer A. After this processing is performed, it is determined whether the number of pieces of received information stored in the buffers A to C is two or more. In this case, since the received information (123) is stored in the buffers A and B, it is determined that the number is two or more, and it is determined whether to output the received information. That is, it is determined whether or not the condition A that “the contents of the buffer A and the contents of the buffer B are equal and the contents of the buffer B and the contents of the buffer C are not equal” is satisfied. If the condition A is satisfied in this determination,
It is determined whether the reception information is stored in the buffer D. If the reception information is not stored in the buffer D, the reception information (123) stored in the buffer B is stored in the buffer D. After this processing is performed, the buffer D
Is output. That is, the received information stored in the buffer D is sent to the terminal control device 4.

Here, upon receiving the received information sent from the card reader 1, the terminal control device 4 determines whether the received information is ID information and is registered in advance. If it is determined that the ID information is ID information and that the ID information is registered in advance, an unlock signal is supplied to the electric lock 6. Thereby, the electric lock 6 drives the lock relay in the direction to unlock the door 5. When the user reaches the detection area c, the reception information stored in the buffer B is read out and stored in the buffer C, and the reception information stored in the buffer A is read out and stored in the buffer A. B. Then, the information (1
23) is stored in the buffer A. After this processing is performed, it is determined whether the number of pieces of received information stored in the buffers A to C is two or more. In this case, since the received information is stored in all of the buffers A to C, it is determined that the number is two or more. If it is determined that there are two or more pieces of received information, it is determined whether or not the condition A is satisfied. In this case, since the reception information is stored in the buffer D although the condition A is satisfied, the reception information is not output.

(C) When the ID information from the card 2 is received again in the approach detection area c, the received information stored in the buffer B is read out, stored in the buffer C, and further stored in the buffer A. The received information is read out and stored in the buffer B. Then, the information received at the present time is stored in the buffer A. After this processing is performed, it is determined whether the number of pieces of received information stored in the buffers A to C is two or more. In this case as well, the received information is stored in all of the buffers A to C, so that it is determined that the number of received information is two or more. Received information is 2
When it is determined that the number is equal to or more than the number, it is determined whether or not the condition A is satisfied. In this case, the reception information is not output because the reception information is stored in the buffer D although the condition A is satisfied.

(D) The user holding the leaving card 2 opens the door 5 and enters the room,
When the user moves away from the card reader 1, reception of ID information is not performed, and “0” is stored in the buffer A. In this case, the received information stored in the buffer B is read out and stored in the buffer C, and the received information stored in the buffer A is read out and stored in the buffer B as described above. After this processing is performed, “0” is stored in the buffer A. Thereafter, the reception information stored in the buffer B is stored in the buffer C every period T2, and the reception information stored in the buffer A is stored in the buffer B. Then, the newly received reception information is stored in the buffer A.

(B) In the case of multiple approaches FIG. 8 is a diagram for explaining the operation in the case of multiple approaches. In this case, it is assumed that the card 2A stores ID information of “123” and the card 2B stores ID information of “456”. In addition, card 2 of ID information of "123"
A user having A (hereinafter referred to as a user H1) goes to the door 5 first, and then a user having a card 2B having ID information of "456" (hereinafter referred to as a user H2) heads toward the door 5. And (A) Approaching 2A When the user H1 holding the card 2A approaches the door 5 and reaches the detection area a, the ID information (123) of the card 2A is stored in the buffer A. Next, when the user H1 reaches the detection area b, the received information stored in the buffer A is read and stored in the buffer B. Then, the information (123) received at the present time is stored in the buffer A. After this processing is performed, it is determined whether the number of pieces of received information stored in the buffers A to C is two or more. In this case, since the received information is stored in the buffers A and B, it is determined that the number is two or more. If it is determined that there are two or more pieces of received information, it is determined whether to output the received information. That is, it is determined whether or not the condition A is satisfied. If it is determined that the condition A is satisfied in this determination, it is determined whether or not the reception information is stored in the buffer D. If it is determined in this determination that the received information is stored, the received information stored in the buffer B is stored in the buffer D. After this processing is performed, the reception information stored in the buffer D is sent to the terminal control device 4.

Next, when the user H1 reaches the detection area c, the reception information stored in the buffer B is read and stored in the buffer C, and the reception information stored in the buffer A is further read and stored in the buffer B. Is stored in And
The information currently received is stored in buffer A. After this processing is performed, it is determined whether the number of pieces of received information stored in the buffers A to C is two or more. In this case, since the received information is stored in all of the buffers A to C, it is determined that the number is two or more. If it is determined that there are two or more pieces of received information, it is determined whether to output the received information. That is, it is determined whether or not the condition A is satisfied. In this case, the reception information is not output because the reception information is stored in the buffer D although the condition A is satisfied.

(B) During approaching 2A When ID information is received again from the card 2A in the detection area c, the received information stored in the buffer B is read out, stored in the buffer C, and further stored in the buffer A. The stored reception information is read out and stored in the buffer B. Then, the information received at the present time is stored in the buffer A. After this processing is performed, it is determined whether the number of pieces of received information stored in the buffers A to C is two or more. In this case as well, the received information is stored in all of the buffers A to C, so that it is determined that the number of received information is two or more. Received information is 2
When it is determined that the number is equal to or more than the number, it is determined whether or not the condition A is satisfied. In this case, the reception information is not output because the reception information is stored in the buffer D although the condition A is satisfied.

(C) Approaching 2B After the ID information from the card 2A is received in the detection area c and the user H2 carrying the card 2B approaches the door 5 and reaches the detection area a, the buffer B Is read and stored in the buffer C, and the received information (123) stored in the buffer A is read and stored in the buffer B. Then, the information (456) received at the present time is stored in the buffer A. After this processing is performed, it is determined whether the number of pieces of received information stored in the buffers A to C is two or more. In this case, since the received information is stored in the buffers A and B, it is determined that the number is two or more. If it is determined that there are two or more pieces of received information, it is determined whether or not the condition A is satisfied. In this case, since the condition A is not satisfied, the reception information is not output.

(D) Approaching 2B Next, when the user H2 holding the card 2B reaches the detection area b, the reception information stored in the buffer B (123)
Is stored in the buffer C, and the reception information (456) stored in the buffer A is further stored in the buffer B. Then, the reception information (456) received at the present time is stored in the buffer A. After this processing is performed, buffers A to
It is determined whether the number of pieces of reception information stored in C is two or more. In this case, since the received information is stored in all of the buffers A to C, it is determined that the number is two or more.

When it is determined that there are two or more pieces of received information, it is determined whether or not the condition A is satisfied. In this case, since the condition A is satisfied, it is determined whether or not the reception information is stored in the buffer D. In this case, since the reception information is stored in the buffer D, it is determined whether or not the reception information is the same as the reception information currently received. In this case, since the reception information stored in the buffer D is “123” and the reception information received at the current time is “456”, the reception information (456) received at the current time is stored in the buffer D, Further, the received information is sent to the terminal control device 4.

(E) Approach 2B Next, when the user H2 reaches the detection area c, the buffer B
Is read and stored in the buffer C, and the received information (456) stored in the buffer A is read and stored in the buffer B. Then, the information (456) received at this time is stored in the buffer A.
Is stored in After this processing is performed, buffers A to C
Is determined whether or not the number of pieces of received information stored in the. In this case, since the received information is stored in all of the buffers A to C, it is determined that the number is two or more. If it is determined that the received information is two or more, the condition A
Is determined whether or not the condition is satisfied. In this case, the reception information is not output because the reception information is stored in the buffer D although the condition A is satisfied.

(F) Leaving When the user H2 holding the card 2B opens the door 5 to enter the room and goes away from the card reader 1, the user H2 stops receiving the ID information and stores "0" in the buffer A. I do. In this case, the reception information (4
56) is read and stored in the buffer C, and the reception information (456) stored in the buffer A is read and stored in the buffer B. Then, “0” is stored in the buffer A. Thereafter, the reception information stored in the buffer B is read out and stored in the buffer C every period T2 during which the reception information is taken in, and the reception information stored in the buffer A is read out and stored in the buffer B. Is stored. Then, the newly received reception information is stored in the buffer A. Thereafter, it is determined whether or not to output the reception information. If it is determined that the reception information is to be output, the reception information is sent to the terminal control device 4.

(C) When Noise Occurs When Approaching Individually FIG. 9 is a diagram for explaining the operation when noise occurs during approaching alone. User holding card 2 has door 5
, And reaches the detection area b, the reception information (12
3) is output. Thereafter, when the user reaches the detection area c, the received information is stored in all of the buffers A to C. Immediately after that, when noise occurs in the vicinity and is received, the received information stored in the buffer B is read and stored in the buffer C, and further the received information stored in the buffer A is read. And stored in the buffer B. Then, the currently received noise is stored in the buffer A.

Then, in the next period T2, the ID information (12
When 3) is received, the reception information (123) stored in the buffer B is read and stored in the buffer C, and the reception information (0) stored in the buffer A is read and stored in the buffer B. Is stored. Then, the received information fetched at the present time is stored in the buffer A. Then, when the ID information (123) is received in the next period T2, the reception information (0) stored in the buffer B is read out, stored in the buffer C, and further received in the buffer A. (123) is read out and stored in the buffer B. Then, the reception information (123) received at the present time is stored in the buffer A.

After this processing is performed, it is determined whether or not the number of pieces of received information stored in the buffers A to C is two or more. In this case, since the received information is stored in all of the buffers A to C, it is determined that the number is two or more.
If it is determined that there are two or more pieces of received information, it is determined whether or not the condition A is satisfied. In this case, condition A
Is satisfied, but new reception information (123) is not output because the reception information (123) is stored in the buffer D. As described above, under the influence of noise while the card 2 is approaching, the condition that “the contents of the buffer A and the contents of the buffer B are equal and the contents of the buffer B and the contents of the buffer C are not equal” is at least 2 Even if the information is satisfied once, the received information is not stored and output in the buffer D from the second time.

As described above, in this embodiment, after receiving the ID information from the card 2 and transmitting the ID information to the terminal control device 4, the same ID information except for the new ID information is transmitted. Absent. Therefore, I from card 2
Since the ID information is not transmitted to the terminal control device 4 every time the D information is received, the data is not transmitted from the terminal control device 4 to the central information processing device 11 as well. Is reduced.

In the above embodiment, the same reception information is not output after the reception information is output. However, a predetermined time (1 second to 5
Second). By doing so, even if the received information is lost due to some influence after outputting the received information once, the received information can be obtained again. Further, in the above-described embodiment, the case of entering the room has been described, but it is apparent that the same processing can be applied to the case of leaving the room. In this case, the antenna 24 may be provided on the indoor side. Further, in the above embodiment, the detection areas are three areas a to c. However, the invention is not limited thereto, and three or more detection areas may be provided. In this case, it is necessary to match the number of buffers with the number of detection areas. By increasing the detection area, I
D information can be determined more reliably. Also,
In the above-described embodiment, the electromagnetic wave is used for transmitting information from the card 2 to the card reader 1. However, infrared or ultrasonic waves can be used instead.

[0044]

According to the card readers of the first and second aspects of the present invention, once the ID information is reliably obtained and transmitted to the management device, the same ID information is not output again. The number of data to be transmitted to the management device is reduced, thereby reducing the load on the device and improving the responsiveness. According to the entry / exit management device of the third aspect of the present invention, since the card reading device according to any one of the first to second aspects is provided, the load on the management device is reduced and the responsiveness is improved. Is obtained. In particular, when the management device inputs a signal from a sensor such as a fire detector or a gas leak detector, it is possible to quickly respond when an abnormality occurs.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an embodiment of an access control device according to the present invention.

FIG. 2 is a block diagram showing a circuit configuration of a card reader of the access control device of the embodiment.

FIG. 3 is a block diagram showing a circuit configuration of an RF modulator which is a component of the card reader of the access control device of the embodiment.

FIG. 4 is a diagram for explaining the operation of the card reader of the access control device of the embodiment.

FIG. 5 is a flowchart for explaining the operation of the card reading device of the access control device of the embodiment.

FIG. 6 is a flowchart for explaining the operation of the card reading device of the access control device of the embodiment.

FIG. 7 is a diagram showing a specific example of the operation of the card reading device of the access control device of the embodiment.

FIG. 8 is a diagram showing a specific example of the operation of the card reading device of the access control device of the embodiment.

FIG. 9 is a diagram showing a specific example of the operation of the card reader of the access control device of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Card reading device 2 Card 4 Terminal control device 5 Door 6 Electric lock 11 Central information processing device 20 CPU 23 RF module 24 Antenna 35 Serial interface 100 Reception information acquisition means 110 Reception information output means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI G07C 9/00 G07C 9/00 Z G07F 7/08 G07F 7/08 S (56) References A) JP-A-6-214992 (JP, A) JP-A-7-192157 (JP, A) JP-A-5-159114 (JP, A) JP-A-3-228988 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) G06K 17/00 G06F 17/60 G07C 9/00 G07F 7/08

Claims (3)

(57) [Claims] A receiving means for receiving information; a plurality of storage means for storing received information; a receiving information capturing means for capturing information received by the receiving means at predetermined time intervals; Storage control means for storing received information in said plurality of storage means in ascending order of the number of said plurality of storage means each time information received by said reception means is taken in by said means; and At the time when the reception information is stored in each of the plurality of storage means, it is determined whether or not there is a predetermined number or more of the stored reception information indicating the personal identification information of the card continuously. The first identification means and the first identification means determine that the plurality of storage means have consecutively a predetermined number or more of the received information indicating the personal identification information of the card. Second determining means for determining whether or not each of the received information indicating the information is the same and different from the immediately preceding received information; and Are all indicating the same personal identification information, and receiving information output means for outputting any one of the continuous receiving information when it is determined that the received information is different from the immediately preceding receiving information. And a re-output prohibition unit for prohibiting re-output of the reception information indicating the same personal identification information for a predetermined time after the reception information is output from the reception information output unit. 2. The card reader according to claim 1, wherein the personal identification information is transmitted from the card to the card reader using electromagnetic waves, infrared rays, or ultrasonic waves. 3. The card reading device according to claim 1, a card for transmitting personal identification information, and receiving information output from the card reading device, wherein the receiving information is used for personal identification. It is determined whether or not the information is registered in advance, and if it is determined that the information is personal identification information and is registered in advance, an electric lock or the like installed on the door is unlocked. And a terminal control device for outputting data based on the personal identification information, and a management device for taking in data output from the terminal control device and performing entry / exit management.