JPH10198830A - Passing permitting device, passing permitting method, and door unlocking and locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain improvement in use convenience by enabling passing permission even without bringing a medium (card) close to a communication means (antenna) so much by extending a communication distance when passing is permitted and the passing within a prescribed time is detected. SOLUTION: For a wall 11 of building or the like, a door 12 is provided, and for the wall 11 near the door 12, an antenna 13 is arranged for exchanging signals with a non-contact card (card). Besides, inside the wall 11 and the door 12, an electric lock 15 having a magnet switch 14 is built in so as to be locked/ unlocked. The antenna 13 performs the transmission/reception of signals with the card. When passing of card is permitted corresponding to the signal received from the card, it is detected whether passing is performed within prescribed time from the permission of passing or not, corresponding to the detection of passing, the communication distance is extended and corresponding to the passing of card, the passing permission is canceled. Passing can be permitted even without bringing the card close to the antenna 13 so much.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door using a non-contact card in which ID code information is stored.
The present invention relates to a traffic permitting device such as a non-contact card gate tank for opening and closing a lock (electric lock), a traffic permitting method, and a door unlocking device.

[0002]

2. Description of the Related Art Conventionally, a door unlocking device as an example of the above-described traffic permitting device has the following configuration. That is, an antenna that reads information from a card on which an identification code is recorded in a non-contact manner, an electric lock that electrically opens and closes a door lock, and an electric lock that determines the identification code read by the above-described antenna. And a controller for opening and closing the door.

[0003] However, in this conventional device, since the communication range of the above-mentioned antenna is constant (uniform), there are the following problems. In other words, if a person who does not intend to enter the room (or area) carries the card and passes in front of the antenna, the door will be unlocked by itself and conversely, a person who intends to enter the room will insert the card into the antenna Unless extremely close, the door cannot be unlocked, and there are inconveniences in terms of security and usability.

[0004]

SUMMARY OF THE INVENTION According to the first aspect of the present invention, the communication distance (communication range) is increased in response to the detection of passage permission and passage within a predetermined time. Therefore, it is possible to permit the passage of traffic even when the medium is not so close to the communication means, to improve the usability, and to provide a traffic permission device which is effective when the number of times of entering and exiting and the number of entering and exiting are large.

[0005] The invention according to claim 2 of the present invention reduces the communication distance when the vehicle is permitted to pass and does not pass within a predetermined time, so that a person who does not intend to pass can carry the medium and carry out the communication means. Automatic narrowing (optimization) of the transmission / reception range even after passing the front can correct it so that it is not allowed to pass, improving security and providing an effective traffic permission device when the number of times of entering and exiting is small. With the goal.

According to a third aspect of the present invention, in addition to the object of the first aspect, by changing the communication range when the medium is allowed to pass and the medium has passed continuously a predetermined number of times, While suppressing unnecessary automatic change of communication range,
It is an object of the present invention to provide a traffic permitting device capable of automatically expanding a communication range when necessary.

According to a fourth aspect of the present invention, in addition to the object of the second aspect of the present invention, the communication range is changed when the passage is permitted and the medium does not pass a predetermined number of times continuously. Accordingly, it is an object of the present invention to provide a traffic permitting device capable of suppressing the automatic change of the unnecessary communication range and automatically reducing the communication range when necessary.

According to a fifth aspect of the present invention, a medium such as a non-contact card is provided by increasing a communication distance in response to detecting that an unlocked door is opened within a predetermined time. The object of the present invention is to provide a door unlocking device which can be unlocked without bringing the device closer to the communication means, improves usability, and is effective when the number of times of entering and exiting and the number of people entering and exiting are large.

The invention according to claim 6 of the present invention reduces the communication distance when the door is unlocked and the door is not opened within a predetermined time, so that a person who does not intend to enter the room carries the medium. Even if you pass in front of the communication means, you can correct the door so that it is not unlocked by the automatic narrowing of the transmission and reception range, improve security, improve the security,
An object of the present invention is to provide an effective door unlocking device when the number of people entering and exiting is small.

[0010] According to a seventh aspect of the present invention, when the passage is permitted and it is detected that the vehicle has passed within a predetermined time, the communication direction is changed to a direction in which the communication area is widened, thereby transmitting the medium to the communication means. It is an object of the present invention to provide a traffic permitting device that can be communicated even if the distance is not so close, improves usability, and is effective when the number of times of entering and exiting and the number of people entering and exiting are large.

[0011] According to an eighth aspect of the present invention, a person who has no intention to pass through the medium can change the communication direction in a direction in which the communication area becomes narrower when the vehicle is permitted to pass and does not pass within a predetermined time. Can be corrected so as not to allow passage by changing the communication direction even if you pass in front of the communication means with carrying, and while improving security, effective traffic permission device when the number of times of entering and exiting, the number of people entering and exiting is small. For the purpose of providing.

[0012] According to a ninth aspect of the present invention, the communication distance (communication range) is increased by responding to the fact that passage is permitted and passage within a predetermined time is detected.
An object of the present invention is to provide a traffic permitting method that enables traffic permission even when the medium is not so close to the communication means, improves usability, and is effective when the number of times of entering and exiting and the number of entering and exiting are large.

According to a tenth aspect of the present invention, when a vehicle is permitted to pass and does not pass within a predetermined time, the communication distance is reduced, so that a person who does not intend to pass can carry the medium and use the communication means. Automatic narrowing (optimization) of the transmission / reception range even after passing the front can be corrected so that passage is not permitted, improving security and providing an effective traffic permission method when the number of times of entering and exiting is small. With the goal.

[0014]

According to a first aspect of the present invention, there is provided a communication means for transmitting / receiving a signal to / from a medium, and a passage permitting means for permitting the passage of the medium in accordance with a signal received from the medium. Detecting means for detecting whether or not the passage is permitted by the passage permitting means and passing within a predetermined time; communication distance changing means for increasing the communication distance in response to the detection of the passage; And a traffic permission canceling means for canceling the traffic permission in response to the request.

According to a second aspect of the present invention, there is provided a communication means for transmitting / receiving a signal to / from a medium, a passage permitting means for permitting the passage of the medium in accordance with a signal received from the medium,
A detecting means for detecting whether or not the passage is permitted by the passage permitting means and passing within a predetermined time; and a communication distance changing means for reducing a communication distance when the medium does not pass within the predetermined time. It is a traffic permitting device.

According to a third aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a traffic permitting device for changing a communication range when traffic is permitted and a predetermined number of continuous media passes. It is characterized by being.

According to a fourth aspect of the present invention, in addition to the configuration of the second aspect of the present invention, a traffic range is changed when a medium is not allowed to pass a predetermined number of times continuously when the passage is permitted. It is a permission device.

According to a fifth aspect of the present invention, there is provided a communication means for transmitting / receiving a signal to / from a medium, an unlocking means for unlocking a lock according to a signal received from the medium, and an unlocking means for unlocking the lock. Detecting means for detecting whether the locked door is opened within a predetermined time; communication distance changing means for increasing the communication distance in response to detecting that the door is opened; and closing the door. And a locking means for locking the door after the door is unlocked.

According to a sixth aspect of the present invention, there is provided a communication means for transmitting / receiving a signal to / from a medium, an unlocking means for unlocking a lock in response to a signal received from the medium, and an unlocking means for unlocking the lock. A door unlocking / locking device comprising: detecting means for detecting whether or not a locked door is opened within a predetermined time; and communication distance changing means for reducing a communication distance when the door is not opened within a predetermined time. It is characterized by being.

According to a seventh aspect of the present invention, there is provided a communication means for transmitting / receiving a signal to / from a medium, a passage permitting means for permitting the passage of the medium in accordance with a signal received from the medium,
Detecting means for detecting whether or not the passage is permitted by the passage permitting means and passing within a predetermined time; and communication direction changing means for changing the communication direction in a direction in which the communication area is widened in accordance with the detection of the passage. And a traffic permission canceling means for canceling the traffic permission according to the passage of the medium.

According to an eighth aspect of the present invention, there is provided a communication means for transmitting / receiving a signal to / from a medium, a passage permitting means for permitting the passage of the medium according to a signal received from the medium,
A detecting means for detecting whether or not the passage is permitted by the passage permitting means and passing within a predetermined time; and a communication for changing a communication direction in a direction in which a communication area becomes narrower when the medium does not pass within the predetermined time. It is a traffic permitting device provided with a direction changing means.

According to a ninth aspect of the present invention, the communication means transmits and receives signals to and from the medium, the passage permitting means permits the passage of the medium in accordance with the signal received from the medium, and the detecting means permits the passage of the medium. Is detected by the communication distance changing means, the communication distance is increased, and the passage of the medium is performed by the passage permission canceling means. It is a traffic permission method for canceling the traffic permission accordingly.

According to a tenth aspect of the present invention, a signal is transmitted to and received from a medium by a communication means, and the medium is permitted to pass by a passage permitting means in accordance with a signal received from the medium.
A traffic permitting method for detecting whether or not the passage is permitted by the pass permitting means and passing within a predetermined time by the detecting means, and reducing the communication distance when the medium does not pass within the predetermined time by the communication distance changing means. It is characterized by being.

[0024]

According to the first aspect of the present invention, the communication means (for example, an antenna) transmits / receives a signal to / from the medium, and the passage permitting means transmits / receives the signal to / from the medium according to the signal received from the medium. Of the owner), and the detecting means detects whether or not the passage is permitted by the above-described passage permitting means and whether or not the vehicle has passed within a predetermined time, and the communication distance changing means responds in response to the detection of the passage. In this case, the communication distance is increased (optimization is attempted), and the traffic permission canceling means cancels the traffic permission according to the passage of the medium.

As described above, when the passage is permitted and it is detected that the vehicle has passed within a predetermined time, the communication distance is automatically changed to increase the distance, so that the passage is permitted without bringing the medium so close to the communication means. Thus, it is possible to improve the usability, and it is effective when the number of times of entering and exiting and the number of people entering and exiting are large (for example, when many people pass at once).

According to the second aspect of the present invention,
The communication means transmits and receives signals to and from the medium, the passage permitting means permits passage of the medium in accordance with the signal received from the medium, and the detecting means permits passage through the above-mentioned passage permitting means and passes within a predetermined time. The communication distance changing means detects whether or not the communication has been performed, and reduces the communication distance (optimization) when the medium does not pass within a predetermined time.

As described above, since the communication distance is reduced when the vehicle is permitted to pass and does not pass within a predetermined time, even if a person who does not intend to pass the medium carries the medium and passes by the communication means, the transmission / reception range is automatically set. It is possible to correct such that the passage is not permitted due to the narrowing, to prevent malfunction and improve security (safety), and it is effective when the number of times of entering and exiting and the number of entering and exiting are small.

According to the third aspect of the present invention,
In addition to the effect of the first aspect of the present invention, the communication range is changed (enlarged) when the medium is allowed to pass and the medium (owner of the medium) passes the predetermined number of times in succession. There is an effect that the communication range can be automatically expanded when necessary while suppressing the automatic change.

According to the fourth aspect of the present invention,
In addition to the effect of the second aspect of the present invention, unnecessary communication is performed because the communication range is changed (reduced) when the medium is allowed to pass and the medium (owner of the medium) has not passed the predetermined number of times continuously. There is an effect that the communication range can be automatically reduced when necessary while suppressing the automatic change of the range.

According to the invention described in claim 5 of the present invention,
The communication means transmits and receives signals to and from the medium, the unlocking means unlocks the lock in accordance with the signal received from the medium, and the detection means opens the door unlocked by the unlocking means within a predetermined time. The communication distance changing means detects whether the door has been opened and increases the communication distance so as to optimize the communication distance, and the locking means locks the door after the door is closed. .

In response to the unlocked door being opened within a predetermined period of time, the communication distance is automatically changed and increased, so that a medium such as a non-contact card is brought closer to the communication means. The lock can be unlocked even without this, and the usability (improvement of convenience) can be improved, and it is effective when the number of times of entering and exiting and the number of people entering and exiting are large.

According to the sixth aspect of the present invention,
The communication means transmits and receives signals to and from the medium, the unlock means unlocks the lock in accordance with the signal received from the medium, and the detection means sets the door unlocked by the unlock means within a predetermined time. The communication distance changing means detects whether the door is opened or not, and reduces the communication distance so that the communication distance becomes optimum when the door is not opened within a predetermined time.

Since the communication distance is reduced when the door is unlocked and the door is not opened within a predetermined time in this way, a person who does not intend to enter the room (or area) carries (possesses) the medium with the communication means. Can prevent the door from being unlocked due to the automatic narrowing of the transmission / reception range even after passing in front of the door, improving security, and also being effective when the number of times of entering and exiting and the number of people entering and exiting are small. is there.

According to the seventh aspect of the present invention,
If the passage is permitted and it is detected that the passage has been made within a predetermined time, the communication direction (for example, the directivity of the antenna) is changed in the direction in which the communication area is widened. Communication becomes possible, usability can be improved, and there is an effect that is effective when the number of times of going in and out and the number of people coming and going are large.

According to the eighth aspect of the present invention,
Since the communication direction is changed in a direction in which the communication area becomes narrower when passage is permitted and the vehicle does not pass within a predetermined time, even if a person who does not intend to pass the medium and passes by the communication means, the communication direction is changed. The change can be corrected so as not to allow the passage, thereby preventing malfunction and improving security, and is effective when the number of times of entering and exiting and the number of entering and exiting are small.

According to the ninth aspect of the present invention,
If the passage is permitted and it is detected that the vehicle has passed within the predetermined time, the communication distance (communication range) is increased to optimize the communication distance. It is possible to permit the passage of traffic even if the distance is not so close, to improve the usability, and to be effective when the number of times of entering and exiting and the number of entering and exiting are large.

According to the tenth aspect of the present invention, when the vehicle is permitted to pass and does not pass for a predetermined time, the communication distance is reduced and optimization is performed. However, even if the user carries the medium and passes in front of the communication means, it is possible to correct the automatic transmission / reception range so that the passage is not permitted by the automatic narrowing of the transmission / reception range. This is effective when the number of people coming and going is small.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawings show a door unlocking method and a device as an example of a traffic permission method and a device thereof.

FIG. 1 shows a door unlocking device. A door 12 is provided on a wall 11 of a building or the like, and a non-contact card A as a medium (hereinafter simply abbreviated as a card) is provided on a wall 11 near the door 12. An antenna 13 (communication means) for transmitting / receiving a signal to / from (see FIG. 2) is provided. The above-mentioned wall 1
An electric lock 15 having a magnet switch 14 is locked (unlocked) and unlocked (unlocked) inside the door 1 and the door 12.
Built-in possible.

FIG. 2 shows a control circuit of the door locking device.
U16 is based on a signal input received from the card A via the antenna 13 and the range switching circuit 17 (communication area changing means), and according to the program stored in the ROM 18, the magnet switch 14 of the electric lock 15 and the timer 1
9. A display and a counter are driven and controlled, and the RAM 20 stores a door open wait timer T, a door open detection counter C1, a door open detection counter C2, a door open detection continuous count N1, and a door open detection count in a predetermined area. Necessary data such as N2 and valid card ID are stored in an updatable manner.

The above-mentioned door opening timer T is a valid card A
This is a timer that measures the time from reading the data until the door 12 is opened. The above counter C1 without door detection is
A counter that counts the number of times a valid card A has been read but the door 12 has not been opened, and is used to change the communication range of the antenna 13.

The above-mentioned door open detection counter C2 is a counter for counting the number of times the valid card A has been read and the door 12 has been opened, and is used to restore the communication range of the antenna 13. The above-mentioned number of consecutive times N1 without detection of door opening is a preset constant, and the counter C1 without detection of door opening detects this value N
When it becomes 1, the communication range is changed. The above-described number N2 of continuous detections of flat opening is a preset constant, and the communication range is restored when the door opening detection counter C2 reaches this value N2.

The above-mentioned valid card ID is one or more ID codes registered in advance, and when the read ID code of the card A matches one of the valid card IDs, it is determined that the card is a valid card. (Data) for performing the operation.

Next, a configuration for automatically changing the communication distance of the antenna 13 will be described with reference to FIG. FIG. 3
The wall 11 and the door 12 indicated by virtual lines in FIG. Two antennas 13 are provided on the outdoor side of the wall 11 described above.
A, 13B are attached. Note that these antennas 13
A and 13B may be either a built-in type or an exposed type in the wall.

One antenna 13A is set as a long-distance antenna having a long communication distance L1, and the other antenna 13B is set as an antenna having a short communication distance L2. The communication ranges of these antennas 13A and 13B are indicated by hatching for convenience of illustration.

The long-range antenna 13A is connected to the CPU 16 via a long-range antenna transmission / reception circuit 21, and the short-range antenna 13B is connected to the CPU 16 via a short-range antenna transmission / reception circuit 22. The configuration is such that these circuit elements are switched and controlled by a switching signal. The two antennas 13A,
Instead of a configuration using 13B, a single antenna is used,
By switching the supply voltage to the transmission coil, the current of the transmission coil may be switched to control the electromagnetic force (communication distance) from the transmission coil.

The CPU 16 unlocks (unlocks) the electric lock 15 according to the signal received from the card A.
Unlocking means (see the fifth step S5 in the flowchart shown in FIG. 4), and detecting means for detecting whether the door 12 unlocked by the unlocking means is opened within a predetermined time T (FIG. 4). And a communication distance changing unit (see the tenth step S10 in the flowchart shown in FIG. 4) that increases the communication distance in response to the detection that the door 12 has been opened. A locking means for locking (locking) the electric lock 15 after the door 12 is closed (see the thirteenth step S13 in the flowchart shown in FIG. 4), and when the door 12 is not opened within the above-mentioned predetermined time T, It also serves as communication distance changing means for reducing the communication distance (see the fifteenth step S15 in the flowchart shown in FIG. 4).

Further, in this embodiment, when the electric lock 15 is unlocked and the card A and its owner pass for a predetermined number of times N2 consecutively (when the door 12 is opened), the communication range is changed to a larger one. When the electric lock 15 is unlocked and the card A and its owner do not pass for a predetermined number of times N1 consecutively (when the door 12 is not opened), the communication range is changed to a smaller communication range. .

In short, in response to the valid card detection determination result, the communication area is expanded or reduced so that the communication range is optimized according to the frequency of opening and closing of the door 12. A door unlocking method by the door unlocking device thus configured will be described in detail below with reference to a flowchart shown in FIG.

In the first step S1, the CPU 16 increases the antenna communication range (communication area) and clears (resets) the counters C1 and C2 to zero (initial setting). In order to increase the communication range of the antenna, it may be set so as to use the long distance antenna 13A shown in FIG.

Next, in a second step S2, the CPU 16 determines the presence or absence of the card A. That is, it is determined whether or not the card A is located in the communication area in proximity to the antenna 13A regardless of whether the owner of the card A intends to open the door 12 (whether or not there is a room). The process shifts to step S3, and returns when the determination is NO.

In the above-mentioned third step S3, the CPU 16 determines whether or not the card is valid. That is, transmission and reception are performed between the card A located in the communication area and the long-distance antenna 13A, the ID code data read from the card A is input to the CPU 16 via the long-distance antenna transmission / reception circuit 21, and a predetermined area of the RAM 20 is transmitted. It is determined whether it matches one of the valid card IDs stored in advance in YES, and YES
At the time of judgment (at the time of coincidence), the process proceeds to the fifth step S5, and NO
At the time of determination (when they do not match), the process proceeds to the fourth step S4.

In the above-described fourth step S4, the CPU 16 drives a display (not shown) to execute NG display, and then returns to the second step S2. Here, as the above-mentioned display, for example, liquid crystal display means (so-called LCD)
Others can be used. On the other hand, in the above-described fifth step S5, the CPU 16 unlocks (unlocks) the electric lock 15 in accordance with the coincidence of the ID codes.

Next, in a sixth step S6, the CPU 16 determines whether or not the door 12 has been opened within a predetermined time T set in advance. If the determination is YES, the process proceeds to the seventh step S7, while if the determination is NO, another process is performed. Move to the eighth step S8.
In response to the door 12 being opened (opened) within the predetermined time T, the CPU 16 increments (adds and counts up) the door open detection counter C2 in the above-described seventh step S7, but does not detect the door open. Clear the counter C1 to zero.

Next, in a ninth step S9, the CPU 16 determines whether or not the value of the counter C2 has become equal to or greater than a preset number N2 of continuous detections of door opening.
The process proceeds to step S10, and when the determination is NO, the process skips to step S12.

In the above-described tenth step S10, the CPU 1
6 enlarges the communication range. That is, under the condition that the short-range antenna 13B is used by repeating the flowchart of FIG. 4, switching to the long-range antenna 13A increases the communication range. The long-range antenna 13
Under the condition that A is used, the long communication distance L1
Therefore, the communication distance may be kept as it is, or the communication distance may be further increased by improving the supply voltage to the transmission coil.

Next, in an eleventh step S11, the CPU 16
Clears the door open detection counter C2 to zero. Then the first
In step S12, the CPU 16 determines whether the door 1 has been opened.
It is determined whether or not No. 2 is closed. If the determination is YES, the process proceeds to the next thirteenth step S13. The detection of the opening / closing of the door 12 can be executed by a door opening / closing detecting means such as a limit switch, a micro switch, and a photoelectric sensor.

In the thirteenth step S13, the CPU 16
Drives the electric lock 15, locks the door 12, and returns to the second step S2. On the other hand, in response to the fact that the door 12 has not been opened (opened) within the predetermined time T, in the above-mentioned eighth step S8, the CPU 16 increments (adds) the door open detection non-detection counter C1 and detects the door open. Clear the counter C2 to zero.

Next, in a fourteenth step S14, the CPU 16
YE determines whether or not the value of the counter C1 without door opening detection is equal to or greater than a preset number N1 of consecutive times without door opening detection.
When the determination is S, the process proceeds to the next fifteenth step S15, while when the determination is NO, the process skips to the above-described thirteenth step S13.

In the above-described fifteenth step S15, the CPU 1
6 reduces the communication range. That is, the long distance antenna 13
Under the condition that A is used, short-range antenna 1
Switching to 3B reduces the communication range. Next, in a sixteenth step S16, the CPU 16 clears the counter C1 without door open detection to zero. Next, a thirteenth step S1
3 and in the thirteenth step S13, the CPU 16
Keeps the electric lock 15 locked.

As described above, according to the above embodiment, the communication means (see the antennas 13A and 13B) transmits and receives signals to and from the medium (see the card A), and the unlocking means (see the fifth step S5) executes the above-mentioned medium. The electric lock 15 is unlocked in response to the signal received from the control unit, and the detecting means (refer to the sixth step S6) detects whether the door 12 unlocked by the unlocking means is opened within a predetermined time T, The communication distance changing means (see the tenth step S10) increases the communication distance in response to detecting that the door 12 has been opened, and changes the locking means (the first step).
In step S13), the electric lock 15 is locked after the door 12 is closed.

The door 12 unlocked in this way is kept for a predetermined time T.
Since the communication distance is automatically changed and increased in response to being opened inside, unlocking is possible without bringing a medium such as a non-contact card so close to the communication means, thereby improving usability. And the effect is effective when the number of times of entering and exiting and the number of entering and exiting are large.

The communication means (antennas 13A, 13B)
) Transmits / receives a signal to / from the medium (see card A), and the unlocking means (see the fifth step S5) unlocks the electric lock 15 in accordance with the signal received from the above-described medium, and the detecting means (see the sixth step S5). The step S6) detects whether or not the door 12 unlocked by the unlocking means is opened within the predetermined time T, and changes the communication distance (see the fifteenth step S15).
Is reduced so that the communication distance is optimized when the door is not opened within the predetermined time T.

Since the communication distance is reduced when the door 12 is unlocked and the door 12 is not opened within the predetermined time T, a person who does not intend to enter the room carries (possesses) the medium (see the card A). Automatically narrows the transmission / reception range even after passing the communication means so that the door 12 is not unlocked. This improves security and is effective when the number of times of entering and exiting and the number of people entering and exiting are small. The effect is as follows.

FIG. 5 shows another embodiment of the door unlocking device.
The wall 11 and the door 12 are shown in a state viewed from a plane similarly to FIG. In this embodiment, two antennas 13C and 13D are provided on the outside surface of the wall 11 via an antenna mount 23.
Is installed. Although two antennas 13C and 13D are exposed in FIG. 5 for convenience of description, they may be built in the wall 11.

One of the antennas 13C has a directivity in a direction substantially perpendicular to the wall surface, and has a communication distance L3 with respect to the card A.
Is set to be long, the other antenna 13D is arranged on the slant surface (inclined surface) of the antenna mount 23, has directivity in the inclined direction with respect to the wall surface, and the communication distance L4 to the card A is short. It is set to be.
The antennas 13C and 13D are connected to the CPU 16 via the antenna switching circuit 24 and the transmission / reception circuit 25.
, And which of the antennas 13C and 13D is used is controlled by an antenna switching signal from the CPU 16.

In this embodiment, the CPU 16 unlocks the electric lock 15 in response to the signal received from the card A (see the fifth step S25 in the flowchart shown in FIG. 6). A detecting means for detecting whether or not the door 12 unlocked by the unlocking means is opened within the predetermined time T (see the sixth step S26 in the flowchart shown in FIG. 6); Communication direction changing means for changing the communication direction in a direction in which the communication area becomes wider in response to the detection (see step S30 in the flowchart shown in FIG. 6), and locking of the electric lock 15 after the door 12 is closed. (Lock) Locking Means (FIG. 6)
(Refer to the thirteenth step S33 of the flowchart shown in (1).)
And a communication direction changing means (see the fifteenth step S35 in the flowchart shown in FIG. 6) for changing the communication direction in a direction in which the communication area becomes narrower when the door 12 is not opened within the above-mentioned predetermined time T. Doubles.

In this embodiment, when the electric lock 15 is unlocked and the card A and its owner pass for a predetermined number of times N2 consecutively (when the door 12 is opened), the communication direction is changed to a side that increases the communication direction (specifically). When the electric lock 15 is unlocked and the card A and its owner do not pass for a predetermined number of times N1 (when the door 12 is not opened), the communication direction is reduced. (Specifically, the antenna 13D is used).

The door unlocking method by the door unlocking device thus configured will be described in detail below with reference to the flowchart shown in FIG. In the first step S21, the CPU 16 sets the directivity on the side where the communication range of the antenna is widened, and clears (resets) the counters C1 and C2 to zero (initial setting). In order to set the directivity on the side where the communication range of the antenna becomes wider, the antenna 13C shown in FIG. 5 may be used.

Next, in a second step S22, the CPU 16 determines the presence or absence of the card A. That is, regardless of whether the owner of the card A intends to open the door 12 (whether or not to enter the room), the card A is located close to the antenna 13C and within the communication area thereof.
It is determined whether or not is located. When the determination is YES, the process proceeds to the third step S23, and when the determination is NO, the process returns.

In the above-described third step S23, the CPU 16
Determines whether the card is valid. That is, transmission and reception are performed between the card A and the antenna 13C located in the communication area, and the data of the ID code read from the card A is transmitted to the CPU via the antenna switching circuit 24 and the transmission and reception circuit 25.
16 and determines whether or not it matches one of the valid card IDs stored in a predetermined area of the RAM 20 in advance. When YES is determined (when matched), the process proceeds to the fifth step S25 and NO determination is performed. Time (when they do not match), the fourth step S2
4 Transfer.

In the above-described fourth step S24, the CPU 16
Drives a display (not shown) to execute NG display, and then returns to the second step S22. Here, as the above-mentioned display, for example, a liquid crystal display means (so-called LC
D) Others can be used. On the other hand, in the above-described fifth step S25, the CPU
Reference numeral 16 unlocks the electric lock 15.

Next, in a sixth step S26, the CPU 16 determines whether or not the door 12 has been opened within a predetermined time T set in advance. When the determination is YES, the process proceeds to the seventh step S27. Move to the eighth step S28. In response to the door 12 being opened (opened) within the predetermined time T, in the above-described seventh step S27, the CPU
16 increments the door open detection counter C2 (addition,
Counter C1 without door open detection
Is cleared to zero.

Next, in a ninth step S29, the CPU 16 determines that the value of the counter C2 is equal to the preset number N2 of consecutive door open detections.
It is determined whether or not the above has been achieved. If YES, the process proceeds to the next tenth step S30, and if NO, the process skips to the twelfth step S32.

In the above-described tenth step S30, the CPU 1
6 changes the directivity so that the communication range is widened. That is, the antenna 13D is obtained by repeating the flowchart of FIG.
Under the condition where is used, the communication range is widened by switching to the antenna 13C. The antenna 13
Under the condition that C is used, the long communication distance L3
Therefore, the communication distance may be kept as it is, or the communication distance may be further increased by improving the supply voltage to the transmission coil.

Next, in an eleventh step S31, the CPU 16
Clears the door open detection counter C2 to zero. Then the first
In step S32, the CPU 16 determines whether the door 1 has been opened.
It is determined whether or not No. 2 has been closed. If the determination is YES, the process proceeds to the next thirteenth step S33. The detection of the opening / closing of the door 12 can be executed by a door opening / closing detecting means such as a limit switch, a micro switch, and a photoelectric sensor.

In the thirteenth step S33, the CPU 16
Drives the electric lock 15, locks the door 12, and returns to the second step S22. On the other hand, in response to the fact that the door 12 has not been opened (opened) within the predetermined time T, in the above-mentioned eighth step S28, the CPU 16 increments (adds) the counter C1 for detecting no door open and performs the door open detection. Clear the counter C2 to zero.

Next, in a fourteenth step S34, the CPU 16
YE determines whether or not the value of the counter C1 without door opening detection is equal to or greater than a preset number N1 of consecutive times without door opening detection.
When the determination is S, the process proceeds to the next fifteenth step S35, while when the determination is NO, the process skips to the above-described thirteenth step S33.

In the fifteenth step S35, the CPU 1
No. 6 changes the directivity so that the communication range becomes narrow. That is, under the condition where the antenna 13C is used, the communication range is narrowed by switching to the antenna 13D.
Next, in a sixteenth step S36, the CPU 16 clears the counter C1 without door open detection to zero. Next, the process proceeds to a thirteenth step S33, and in this thirteenth step S33, the CP
U16 keeps the electric lock 15 locked.

As described above, according to the embodiment shown in FIGS. 5 and 6, when it is detected that the door 12 is unlocked and the door 12 is opened within the predetermined time T, the communication direction is increased in the direction of increasing the communication area. (For example, the directivity of the antenna) is changed, so that it is possible to unlock the card A without bringing the card A so close to the communication means, to improve the usability and to be effective when the number of times of entering and exiting and the number of people entering and exiting are large. There is an effect.

The door 12 is unlocked and within a predetermined time T.
When the user cannot open the card A, the communication direction is changed so that the communication area becomes narrower.
Can be corrected so as not to be unlocked due to a change in the communication direction even when the user passes the front of the antennas 13C and 13D while carrying the device, preventing both malfunction and improving security, This is effective when the number of people coming and going is small.

In correspondence with the configuration of the present invention and the above-described embodiment, the traffic permitting method and apparatus of the present invention are as follows.
For the door unlocking and the device of the embodiment, hereinafter, similarly,
The medium corresponds to the card A (contactless card), the communication means corresponds to the antennas 13 and 13A to 13D, and the passage permitting means and the unlocking means correspond to each step S under the control of the CPU 16.
5 and S25, and the detecting means performs each step S6, S25
26, the communication distance changing means of claims 1, 5, and 9 corresponds to the tenth step S10.
The communication distance changing means of “0” corresponds to the fifteenth step S15, the traffic permission canceling means, the locking means exceptional step S13,
Corresponding to S33, the communication direction changing means according to claim 7 is the first communication direction changing means.
0 corresponds to step S30, and the communication direction changing means of claim 8 corresponds to the fifteenth step S35.
Although corresponding to 5, the present invention is not limited only to the configuration of the above-described embodiment.

For example, instead of the configuration shown in FIG. 5, a single antenna supported so as to be controlled in rotation may be provided, and this antenna may be rotated forward and reverse by a motor or the like to change the directivity. Good.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a door unlocking device of the present invention.

FIG. 2 is a control circuit block diagram of the door unlocking device.

FIG. 3 is an explanatory diagram showing a communication area switching configuration.

FIG. 4 is a flowchart showing a door unlocking method according to the present invention.

FIG. 5 is an explanatory view showing another embodiment of the communication area switching configuration of the present invention.

FIG. 6 is a flowchart showing another embodiment of the door unlocking method of the present invention.

[Description of Signs] 12: Door 13, 13A to 13D: Antenna A: Card S5, S25: Locking means (pass permitting means) S6, S26: Detecting means S10, S15: Communication distance changing means S13: Locking means, etc. Permission canceling means) S30, S35 ... communication direction changing means

Claims (10)

[Claims] Communication means for transmitting and receiving signals to and from a medium;
A passage permitting means for permitting the passage of the medium in accordance with a signal received from the medium, a detecting means for detecting whether or not the passage is permitted by the passage permitting means and within a predetermined time; A traffic permitting device comprising: a communication distance changing means for increasing a communication distance accordingly; and a traffic permission canceling means for revoking a traffic permission in response to passage of a medium. 2. Communication means for transmitting and receiving signals to and from a medium,
Passage permitting means for permitting the passage of the medium in accordance with a signal received from the medium, detecting means for permitting passage by the passage permitting means and detecting whether or not the medium has passed within a predetermined time; A communication distance changing means for reducing a communication distance when the vehicle does not pass. 3. The traffic permitting device according to claim 1, wherein the communication range is changed when traffic is permitted and the medium has passed continuously a predetermined number of times. 4. The traffic permitting device according to claim 2, wherein the communication range is changed when traffic is permitted and the medium does not pass continuously for a predetermined number of times. 5. Communication means for transmitting and receiving signals to and from a medium,
Unlocking means for unlocking the lock in accordance with the signal received from the medium, detecting means for detecting whether the door unlocked by the unlocking means has been opened within a predetermined time, and opening the door. A door unlocking device comprising: a communication distance changing unit that increases a communication distance in response to the detection of the fact that the door is closed; and a locking unit that locks the door after the door is closed. 6. Communication means for transmitting and receiving signals to and from a medium,
Unlocking means for unlocking the lock according to the signal received from the medium, detecting means for detecting whether or not the door unlocked by the unlocking means has been opened within a predetermined time; A door unlocking device comprising: a communication distance changing unit that reduces a communication distance when the door is not opened. 7. Communication means for transmitting and receiving signals to and from a medium,
A passage permitting means for permitting the passage of the medium in accordance with a signal received from the medium, a detecting means for detecting whether or not the passage is permitted by the passage permitting means and within a predetermined time; A traffic permitting device comprising: a communication direction changing means for changing a communication direction in a direction in which a communication area is widened, and a traffic permission canceling means for revoking a traffic permission in response to passage of a medium. 8. Communication means for transmitting / receiving a signal to / from a medium,
Passage permitting means for permitting the passage of the medium in accordance with a signal received from the medium, detecting means for permitting passage by the passage permitting means and detecting whether or not the medium has passed within a predetermined time; A communication direction changing means for changing the communication direction in a direction in which the communication area becomes narrower when the vehicle does not pass. 9. Transmission and reception of a signal with a medium by a communication means,
The passage permitting means permits the passage of the medium according to the signal received from the medium, the detecting means detects whether or not the passage is permitted by the passage permitting means and passes within a predetermined time, and the communication distance changing means allows the passage. A traffic permitting method that increases the communication distance in response to the detection of the traffic, and cancels the traffic permit in response to the passage of the medium by the traffic permit canceling means. 10. A communication means for transmitting / receiving a signal to / from a medium, a passage permitting means permitting passage of the medium in accordance with a signal received from the medium, a detecting means permitting passage of the medium and a predetermined time. A traffic permitting method for detecting whether or not the vehicle has passed through the vehicle, and reducing the communication distance when the medium does not pass within a predetermined time by the communication distance changing means.