JP2015227594A - Unlocking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unlocking device capable of unlocking an electric lock with a simple constitution, without reducing convenience.SOLUTION: A detection part 12 detects a tag 9-existent range from a plurality of ranges set on the basis of intensity of a radio wave from a reader 7 received by a tag 9 and intensity of a radio wave from a reader 8. A determination part 13 determines whether or not the tag 9 approaches a door on the basis of a detection result of the detection part 12. A lock control part 14 unlocks an electric lock 3 when identification information received from the tag 9 to the reader 7 and the reader 8 is stored in a storage device 11 when determines that the tag 9 approaches the door by the determination part 13.

Description

  The present invention relates to an apparatus for unlocking an electric lock of a door.

  Patent Document 1 describes an apparatus for managing entry / exit. In the apparatus described in Patent Document 1, it is determined that there is an intention to pass when the identification information is continuously received for a certain period of time.

  Patent Document 2 describes an apparatus for opening and closing a door. The device described in Patent Literature 2 includes a human sensor and a receiver including an antenna. If the identification information received by the antenna matches the registered identification information, the human sensor is turned on. When the presence sensor detects the presence of the person, the door is opened.

Japanese Patent No. 3918224 JP 2011-21327 A

  In the device described in Patent Document 1, even if a person who is permitted to enter and leave the door approaches the door, the electric lock is not unlocked unless waiting for a certain time. There was a problem that it took time to enter and leave the room and the convenience was poor.

  In the apparatus described in Patent Document 2, both a receiver and a human sensor are required to determine the intention of passing. There is a problem that the configuration of the apparatus becomes complicated.

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide an unlocking device capable of unlocking an electric lock with a simple configuration without reducing convenience.

  The unlocking device according to the present invention transmits a first frequency band radio wave and receives a first frequency band radio wave, a storage device that stores identification information permitted to unlock the door electric lock, and the first frequency band radio wave First reading device and second reading device for receiving identification information transmitted from radio wave in second frequency band from information storage medium, intensity of radio wave from first reading device received by information storage medium, and second reading device From the plurality of ranges set based on the intensity of radio waves from the detection means for detecting the range in which the information storage medium exists, and when the first reading device and the second reading device receive the same identification information, Based on the detection result of the detection means, when it is determined by the determination means that determines whether the information storage medium having the identification information has approached the door and the determination means that the information storage medium has approached the door, First reading device and first If the identification information reading device has received from the information storage medium is stored in the storage device, those comprising a lock control means for unlocking the electric lock, the.

  With the unlocking device according to the present invention, the electric lock can be unlocked with a simple configuration without reducing convenience.

It is a figure which shows the example which applied the unlocking apparatus in Embodiment 1 of this invention. It is a figure which shows the structure of the unlocking apparatus in Embodiment 1 of this invention. It is a figure for demonstrating the function of a detection part. It is a flowchart which shows operation | movement of the unlocking apparatus in Embodiment 1 of this invention. It is a flowchart which shows the other operation | movement of the unlocking apparatus in Embodiment 1 of this invention. It is a figure which shows the example which applied the unlocking apparatus in Embodiment 2 of this invention. It is a figure for demonstrating an example of the function of the unlocking apparatus shown in FIG. It is a figure which shows the example which applied the unlocking apparatus in Embodiment 3 of this invention. It is a figure which shows the structure of the unlocking apparatus in Embodiment 3 of this invention. It is a figure which shows the example which applied the unlocking apparatus in Embodiment 4 of this invention. It is a figure which shows the structure of the unlocking apparatus in Embodiment 4 of this invention.

  The present invention will be described with reference to the accompanying drawings. The overlapping description will be simplified or omitted as appropriate. In each figure, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
FIG. 1 is a diagram showing an example in which the unlocking device according to Embodiment 1 of the present invention is applied. FIG. 2 is a diagram showing the configuration of the unlocking device according to Embodiment 1 of the present invention.

  In a building equipped with this unlocking device, a door 2 is installed at an entrance 1 where it is desired to restrict passage only to authorized persons. The door 2 is locked by an electric lock 3. In the present embodiment, an example is shown in which entry into the room 4 is restricted. That is, the door 2 partitions the room 4 and the hallway 5.

  The place where this unlocking device is applied is not limited to this. For example, the unlocking device may be applied to a door provided at the entrance of a building. The unlocking device may be applied to a door provided at an exit for exiting the site.

A reading device 7 and a reading device 8 are provided on the wall 6 adjacent to the door 2.
The reading device 7 transmits radio waves in a certain frequency band. For example, the reading device 7 transmits radio waves in a low frequency band radially. The tag 9 is activated by receiving radio waves from the reading device 7. When the tag 9 receives a radio wave from the reading device 7 and starts up, the tag 9 transmits a radio wave in a certain frequency band. For example, the tag 9 transmits radio waves in a high frequency band radially. When the tag 9 receives the radio wave from the reading device 7 and starts up, the tag 9 transmits identification information by the radio wave. The identification information is information for identifying the tag 9. Individual identification information is given to each tag 9. The reading device 7 receives radio waves from the tag 9. That is, the reading device 7 receives the identification information from the tag 9. The range in which the tag 9 can receive the radio wave from the reading device 7 and the radio wave from the tag 9 can be received by the reading device 7 is the detection range of the reading device 7. For example, the detection range of the reading device 7 extends radially from the reading device 7.

  The configuration and function of the reading device 8 are the same as the configuration and function of the reading device 7. The door 2 is disposed between the reading device 7 and the reading device 8, for example. In the example shown in FIG. 1, the reading device 7 is installed on the left wall of the door 2 when viewed from the corridor 5 side. The reading device 8 is installed on the right wall of the door 2 when viewed from the corridor 5 side.

  A person who is permitted to enter the room 4 has the tag 9. The tag 9 is an example of an information storage medium having identification information. An example of the tag 9 is a passive IC tag. The information storage medium may be a medium other than the tag as long as it has identification information. The information storage medium may be, for example, a mobile phone or a dedicated terminal.

  The control device 10 controls the electric lock 3. The reading device 7 and the reading device 8 transmit the received information to the control device 10. The control device 10 unlocks the electric lock 3 based on the information received from the reading device 7 and the reading device 8. In order to realize such a function, the control device 10 includes a storage device 11, a detection unit 12, a determination unit 13, and a lock control unit 14.

  One or more pieces of identification information are stored in the storage device 11. The identification information stored in the storage device 11 is identification information that is permitted to unlock the electric lock 3. That is, the tag 9 having the same identification information as the identification information stored in the storage device 11 is given to a person who is permitted to pass through the doorway 1.

  The detection unit 12 detects a range where the tag 9 exists from a plurality of ranges set in the vicinity of the door 2. Hereinafter, the function of the detection unit 12 will be described in detail with reference to FIG. FIG. 3 is a diagram for explaining the function of the detection unit 12.

  As shown in FIG. 3, a range A to a range C are preset in the vicinity of the door 2 on the corridor 5 side. Range A is set in the immediate vicinity of door 2. The range B is set at a position farther from the door 2 than the range A. The range C is set at a position farther from the door 2 than the range A. The distance from the door 2 in the range B and the distance from the door 2 in the range C are substantially the same. The range A is set near the reading device 7 and the reading device 8. The range B is set at a position farther from the reading device 7 than the range A. The range B is set at a position farther from the reading device 8 than the range A. The range C is set at a position farther from the reading device 7 than the range A. The range C is set at a position farther from the reading device 8 than the range A. Further, the distance from the reading device 7 in the range B is shorter than the distance from the reading device 8 in the range B. The distance from the reading device 8 in the range C is shorter than the distance from the reading device 7 in the range C.

  Table 1 below shows the radio field intensity from the range A to the range C.

  In range A, the intensity of the radio wave from the reading device 7 is strong, and the intensity of the radio wave from the reading device 8 is also strong. In range B, the intensity of the radio wave from the reading device 7 is strong, and the intensity of the radio wave from the reading device 8 is weak. In range C, the intensity of the radio wave from the reading device 7 is weak and the intensity of the radio wave from the reading device 8 is high. For example, the tag 9 existing in the range B receives a strong radio wave from the reader 7 and receives a weak radio wave from the reader 8. Note that “strong” and “weak” of radio waves can be easily set depending on whether a value is stronger or weaker than that value.

  The detection unit 12 detects a range where the tag 9 exists from a plurality of ranges set based on the intensity of the radio wave from the reading device 7 received by the tag 9 and the intensity of the radio wave from the reading device 8. For example, when both the reading device 7 and the reading device 8 receive the same identification information, the detection unit 12 detects the above range based on the received information.

  In the above example, the intensity of the radio wave from the reading device 7 received by the tag 9 and the intensity of the radio wave from the reading device 8 are set in two stages of “strong” and “weak”, respectively, and the three ranges A to C are Set. The setting of the range for the detection unit 12 to detect the presence of the tag 9 is not limited to the above example. For example, the radio wave intensity may be set in three stages, and four or more ranges may be set.

  The determination unit 13 determines whether the tag 9 (person who owns the tag 9) has approached the door 2. When both the reading device 7 and the reading device 8 receive the same identification information, the determination unit 13 makes a determination regarding the tag 9 having the identification information based on the detection result of the detection unit 12.

  The lock control unit 14 controls the electric lock 3. The electric lock 3 is normally locked. For example, the lock control unit 14 receives the identification information stored in the storage device 11 from the tag 9 by the reading device 7 and the reading device 8 and determines that the tag 9 has approached the door 2 by the determination unit 13. In this case, the electric lock 3 is unlocked.

  Each part shown to the codes | symbols 12-14 shows the function which the control apparatus 10 has. The control device 10 includes, as hardware resources, for example, a circuit including an input / output interface, a CPU, and a memory. The storage device 11 is a part of the memory. The control apparatus 10 implement | achieves each function which each part 12-14 has by performing the program memorize | stored in memory by CPU. Some or all of these functions may be realized by hardware. The same applies to the parts 16 and 17 not described in the present embodiment.

  Next, the operation of the unlocking apparatus having the above configuration will be described with reference to FIG. FIG. 4 is a flowchart showing the operation of the unlocking device according to Embodiment 1 of the present invention. In the following description of the operation, it is assumed that range A to range C are preset as shown in FIG. Further, it is assumed that identification information Ia is assigned to a tag 9a possessed by a person who is permitted to pass through the entrance 1. That is, the identification information Ia is stored in the storage device 11.

  The control device 10 determines whether or not the tag 9 has been detected based on the information received from the reading device 7 and the reading device 8 at a constant cycle (S101). When the person carrying the tag 9a reaches the range B, the identification information Ia is read by both the reading device 7 and the reading device 8. Upon receiving the identification information Ia from the tag 9a, the reading device 7 and the reading device 8 transmit the received identification information Ia to the control device 10.

  When the reading device 7 and the reading device 8 receive the same identification information, the detection unit 12 detects a range where the tag 9 having the identification information exists (YES in S101). In the above example, the detection unit 12 detects that the tag 9a exists in the range B. When it is detected for the first time that the tag 9a is present in any of the ranges A to C, counting of the time during which the presence of the tag 9a is continuously detected is started (S102). This time is counted until the detection unit 12 no longer detects the presence of the tag 9a. When the detection unit 12 no longer detects the presence of the tag 9a, the series of operations ends.

  When the presence of the tag 9 is detected by the detection unit 12, the determination unit 13 determines whether the tag 9 has approached the door 2 (S104). The determination in S104 is performed as follows, for example.

  The determination unit 13 first determines whether or not the tag 9 whose presence has been detected by the detection unit 12 has moved. The determination unit 13 does not determine that the tag 9 has moved while the detection unit 12 detects that the tag 9 is in the same range. For example, when it is detected again that the tag 9a exists in the range B immediately after it is detected that the tag 9a exists in the range B, the determination unit 13 does not determine that the tag 9a has moved. If it is detected that the tag 9a exists in the range A or C immediately after it is detected that the tag 9a exists in the range B, the determination unit 13 determines that the tag 9a has moved.

If it is determined that the tag 9 has moved, the determination unit 13 then determines whether the tag 9 has approached the door 2. For example, when it is detected that the tag 9 a has moved from the range B to the range C, the determination unit 13 does not determine that the tag 9 a has approached the door 2. When it is detected that the tag 9 a has moved from the range B to the range A, the determination unit 13 determines that the tag 9 a has approached the door 2.
Thus, the determination part 13 may be provided with a movement determination function and an approach determination function.

  When it is determined in S104 that the tag 9 has approached the door 2, the lock control unit 14 determines whether or not the first time has elapsed since the detection unit 12 detected the presence of the tag 9 (S106). ). For example, the lock control unit 14 determines whether one second has elapsed in S106. If it is determined in S106 that 1 second has elapsed, the lock control unit 14 unlocks the electric lock 3 if the identification information of the tag 9 is stored in the storage device 11 (S107).

  The identification information Ia is stored in the storage device 11. For this reason, if it is detected that the tag 9a has approached the door 2 and one second has elapsed since the presence of the tag 9a was detected by the detection unit 12, the lock control unit 14 unlocks the electric lock 3 for a certain period of time. Lock. Note that if the presence of the tag 9a is not detected before it is determined in S106 that one second has elapsed, the lock control unit 14 does not unlock the electric lock 3 (NO in S105).

  The first time used in the determination in S106 can be arbitrarily set. In the above example, the first time is set to 1 second. The first time may be set to a time of 1 second or longer. The first time may be set to 0 seconds.

  On the other hand, immediately after the person carrying the tag 9a reaches the range B, it is not determined that the tag 9a has approached the door 2 in S104. If it is not determined in S104 that the tag 9 has approached the door 2, the lock control unit 14 determines whether or not the second time has elapsed since the detection unit 12 detected the presence of the tag 9 (S108). . The second time is set to be longer than the first time. For example, the lock control unit 14 determines whether or not 4 seconds have elapsed in S108. If it is determined in S108 that 4 seconds have elapsed, the lock control unit 14 unlocks the electric lock 3 if the identification information of the tag 9 is stored in the storage device 11 (S107). If the presence of the tag 9 is not detected by the detection unit 12 before the determination of YES is made in any of S104 and S108 (NO in S103), the lock control unit 14 does not unlock the electric lock 3.

  Whether or not the identification information received by the reading device 7 and the reading device 8 is stored in the storage device 11 may be determined before or after the determination in S101, or immediately before the electric lock 3 is unlocked in S107. You may go to

  In the unlocking device having the above-described configuration, when a person who is permitted to pass through the doorway 1 has the tag 9 and approaches the door 2, the electric lock 3 is automatically unlocked. There is no need to wait for the electric lock 3 to be unlocked in front of the door 2, and convenience is not reduced. In addition, it is possible to determine the intention of passing the person who has the tag 9 with a simple configuration.

  When a person who is permitted to pass through the doorway 1 holds the tag 9 and stops in front of the door 2, the electric lock 3 is unlocked after the second time has elapsed. If the user leaves the door 2 before the second time elapses, the electric lock 3 is not unlocked. For this reason, it is possible to prevent the electric lock 3 from being unlocked unnecessarily. In the example illustrated in FIG. 4, when the approach to the door 2 is not detected in S <b> 104, the time until unlocking is delayed compared to the case where it is detected. This is an example. If the approach to the door 2 is not detected for a certain period of time, it may be determined that there is no intention to pass and the electric lock 3 may not be unlocked.

  FIG. 5 is a flowchart showing another operation of the unlocking apparatus according to Embodiment 1 of the present invention. The operations shown in S201 to S205 in FIG. 5 are the same as the operations shown in S101 to S105 in FIG.

  When it is determined in S204 that the tag 9 has approached the door 2, the lock control unit 14 determines whether or not the third time has elapsed since the detection unit 12 detected the presence of the tag 9 (S206). ). For example, the lock control unit 14 determines whether or not 3 seconds have elapsed in S206. If it is determined in S206 that 3 seconds have elapsed, the lock control unit 14 unlocks the electric lock 3 if the identification information of the tag 9 is stored in the storage device 11 (S207).

  The identification information Ia is stored in the storage device 11. For this reason, if it is detected that the tag 9a has approached the door 2 and 3 seconds have passed since the detection of the presence of the tag 9a by the detection unit 12, the lock control unit 14 unlocks the electric lock 3 for a certain period of time. Lock. Note that if the presence of the tag 9a is not detected before it is determined in S206 that 3 seconds have elapsed, the lock control unit 14 does not unlock the electric lock 3 (NO in S205).

  The third time used in the determination in S206 can be arbitrarily set. In the above example, the third time is set to 3 seconds. The third time may be set to a time of 3 seconds or more. Further, the third time may be set to a time shorter than 3 seconds. For example, the third time may be set to 1 second. The third time may be set to 0 seconds.

  On the other hand, immediately after the person carrying the tag 9a reaches the range B, it is not determined that the tag 9a has approached the door 2 in S204. When it is not determined that the tag 9 has approached the door 2 in S204, the lock control unit 14 determines whether or not the fourth time has elapsed since the presence of the tag 9 was detected by the detection unit 12 (S208). . The fourth time is set to be longer than the third time. For example, the lock control unit 14 determines whether 10 seconds have elapsed in S208. If it is determined in S208 that 10 seconds have elapsed, the lock control unit 14 ends the series of operations after the presence of the tag 9 is no longer detected (NO in S209). That is, the lock control unit 14 does not unlock the electric lock 3 even if the same identification information as the identification information of the tag 9 is stored in the storage device 11. In addition, when the presence of the tag 9 is not detected before the determination of YES is made in either S204 or S208 (NO in S203), the lock control unit 14 does not unlock the electric lock 3.

  In the unlocking device having the above configuration, when the approach to the door 2 is not detected for a certain period of time, it is determined that there is no intention to pass, and the electric lock 3 is not unlocked. For this reason, it is possible to prevent the electric lock 3 from being unlocked when unlocking is not necessary.

Embodiment 2. FIG.
FIG. 6 is a diagram showing an example in which the unlocking device according to Embodiment 2 of the present invention is applied. The configuration of the unlocking device in the present embodiment corresponds to a configuration in which the detector 15 is further provided in the configuration disclosed in the first embodiment.

  The detector 15 detects the presence of a person in the vicinity of the door 2. For example, the detector 15 detects the presence of a person within a range in which the detection unit 12 can detect the presence of the tag 9. For example, the detector 15 detects the presence of a person in the entire range in which the reading device 7 and the reading device 8 can receive the identification information from the tag 9. The detector 15 may detect the presence of a person in a part of a range in which the reading device 7 and the reading device 8 can receive the identification information from the tag 9. The detector 15 also detects the presence of a person who does not have the tag 9. As the detector 15, for example, a sensor that detects the temperature of a person is suitable. FIG. 6 shows, as an example, a case where sensors capable of detecting the temperature of a person are installed in a grid shape in the corridor 5 in front of the door 2.

  When detecting the presence of a person, the detector 15 transmits information to that effect to the control device 10. FIG. 7 is a diagram for explaining an example of functions of the unlocking device shown in FIG. 6. When the detector 15 detects the presence of a plurality of people, the lock control unit 14 does not unlock the electric lock 3. In other words, the lock control unit 14 detects the presence of a plurality of people even if both the reading device 7 and the reading device 8 receive the identification information stored in the storage device 11 from the tag 9. If so, the electric lock 3 is not unlocked. As another example, when the presence of more persons than the number of identification information received by the reader 7 and the reader 8 is detected by the detector 15, the lock controller 14 does not unlock the electric lock 3. .

  Other functions and operations of the unlocking device in the present embodiment are the same as the functions and operations disclosed in the first embodiment. With the unlocking device according to the present embodiment, it is possible to prevent a person who does not have an effective tag 9 from passing through the entrance 1.

Embodiment 3 FIG.
FIG. 8 is a diagram showing an example in which the unlocking device according to Embodiment 3 of the present invention is applied. FIG. 9 is a diagram showing the configuration of the unlocking device according to Embodiment 3 of the present invention. The configuration of the unlocking device in the present embodiment corresponds to a configuration in which the detection unit 16 is further added to the control device 10 disclosed in the second embodiment.

  The detection unit 16 detects that a person has made a movement that does not approach the door 2 based on the result detected by the detector 15. For example, let us consider a case where sensors 15 a to 15 e capable of detecting a human temperature are arranged side by side in the passage direction of the corridor 5 as the detector 15. The traveling direction of the corridor 5 is the D direction shown in FIG. 8 or the direction opposite to the D direction. When the sensors 15 a to 15 e detect the presence of a person, the sensors 15 a to 15 e transmit information to that effect to the control device 10. Based on the information received from the sensors 15 a to 15 e, the detection unit 16 detects that a person has made a movement that does not approach the door 2. For example, when the person moves so as to pass in front of the door 2, the detection unit 16 detects that the person has moved so as not to approach the door 2. As an example, when the detection unit 16 receives information indicating that the presence of a person has been sequentially detected from the sensors 15b, 15c, and 15d within a certain period of time, the detection unit 16 indicates that the person has not moved close to the door 2. To detect.

  The lock control unit 14 does not unlock the electric lock 3 when the detection unit 16 detects that the person has moved so as not to approach the door 2. That is, the lock control unit 14 has moved so that the person does not approach the door 2 even when both the reading device 7 and the reading device 8 receive the identification information stored in the storage device 11 from the tag 9. If it is detected by the detection unit 16, the electric lock 3 is not unlocked.

  Other functions and operations of the unlocking device in the present embodiment are the same as the functions and operations disclosed in the second embodiment. If it is an unlocking apparatus in this Embodiment, it will become possible to perform the determination of the intention to pass the entrance / exit 1 in detail.

Embodiment 4 FIG.
FIG. 10 is a diagram showing an example in which the unlocking device according to Embodiment 4 of the present invention is applied. FIG. 11 is a diagram showing the configuration of the unlocking device according to the fourth embodiment of the present invention.

  The configuration of the unlocking device in the present embodiment corresponds to a configuration in which a determination unit 17 is further added to the control device 10 disclosed in the third embodiment. In the present embodiment, the tag 9 incorporating the acceleration sensor 18 is used. When the tag 9 receives the radio wave from the reading device 7 and starts up, the tag 9 transmits the direction information from the acceleration sensor 18 together with the identification information. The reading device 7 receives identification information and direction information from the tag 9. The same applies to the reading device 8.

  Based on the direction information received from the reading device 7 and the reading device 8, the determination unit 17 determines whether the tag 9 that transmitted the direction information is approaching the door 2. For example, the determination unit 17 performs the above determination when the detection unit 16 does not detect that a person has moved so as not to approach the door 2. For example, when a person carrying the tag 9 approaches the door 2 within the detection range of the sensor 15a, the detection unit 16 does not detect that the person has moved so as not to approach the door 2. The determination unit 17 performs the above determination in such a case.

  When the determination unit 17 determines that the tag 9 is approaching the door 2, the lock control unit 14 stores the same identification information as the identification information received by the reading device 7 and the reading device 8 from the tag 9. If stored in the device 11, the electric lock 3 is unlocked.

  Other functions and operations of the unlocking device in the present embodiment are the same as the functions and operations disclosed in the third embodiment. If it is an unlocking apparatus in this Embodiment, it will become possible to perform the determination of the intention to pass the entrance / exit 1 in detail.

  1 doorway, 2 doors, 3 electric locks, 4 rooms, 5 corridors, 6 walls, 7 reading devices, 8 reading devices, 9 tags, 10 control devices, 11 storage devices, 12 detection units, 13 determination units, 14 lock control units , 15 detector, 16 detector, 17 determiner, 18 acceleration sensor

Claims (8)

A storage device for storing identification information permitted to unlock the electric lock of the door;
A first reading device and a second reading device that transmit radio waves of a first frequency band and receive identification information transmitted by radio waves of a second frequency band from an information storage medium that has received the radio waves of the first frequency band;
Detection for detecting a range where the information storage medium exists from a plurality of ranges set based on the strength of the radio wave from the first reading device and the strength of the radio wave from the second reading device received by the information storage medium Means,
When the first reading device and the second reading device receive the same identification information, it is determined whether or not an information storage medium having the identification information has approached the door based on the detection result of the detection unit. Determination means to perform,
When the determination means determines that the information storage medium has approached the door, the identification information received from the information storage medium by the first reading device and the second reading device is stored in the storage device. A lock control means for unlocking the electric lock;
Unlocking device. The lock control means includes
When the determination unit determines that the information storage medium has approached the door, the first reading device and the second reading device continuously receive the identification information included in the information storage medium for a first time; and If the identification information is stored in the storage device, unlock the electric lock,
If the determination means does not determine that the information storage medium has approached the door, the first reading device and the second reading device continuously receive the same identification information for a second time longer than the first time and The unlocking device according to claim 1, wherein if the identification information is stored in the storage device, the electric lock is unlocked. The lock control means includes
When the determination means determines that the information storage medium has approached the door, the first reading device and the second reading device continuously receive the identification information of the information storage medium for a third time; and If the identification information is stored in the storage device, unlock the electric lock,
When the determination unit does not determine that the information storage medium has approached the door, the first reading device and the second reading device continuously receive the same identification information for a fourth time longer than the third time, The unlocking device according to claim 1, wherein the electric lock is not unlocked even if the identification information is stored in the storage device. The determination means includes
Movement determination for determining whether or not the information storage medium having the identification information has moved based on the detection result of the detection means when the first reading device and the second reading device have received the same identification information Means,
An approach determining means for determining whether or not the information storage medium has approached the door based on a detection result of the detecting means when the movement determining means determines that the information storage medium has moved;
The unlocking device according to claim 1, comprising: A detector that detects the presence of a person in a range in which the first reading device and the second reading device can receive identification information from an information storage medium;
Further comprising
When the presence of a plurality of persons is detected by the detector, the lock control means is configured to receive the electrical information even if the first reading device and the second reading device receive identification information stored in the storage device. The unlocking device according to any one of claims 1 to 4, wherein the lock is not unlocked. A detector that detects the presence of a person in a range in which the first reading device and the second reading device can receive identification information from an information storage medium;
Further comprising
The lock control means does not unlock the electric lock when the detector detects the presence of more people than the number of identification information received by the first reading device and the second reading device. The unlocking device according to any one of claims 1 to 4. A detector that detects the presence of a person in a range in which the first reading device and the second reading device can receive identification information from an information storage medium;
Based on the detection result of the detector, a second detection means for detecting that a person has moved without approaching the door;
With
The lock control means stores the first reading device and the second reading device in the storage device when it is detected by the second detection means that a person has moved away from the door. The unlocking device according to any one of claims 1 to 4, wherein the electric lock is not unlocked even when the identification information is received. Based on the direction information received by the first reading device and the second reading device together with the identification information from the information storage medium when the second detection means does not determine that a person has performed an action that does not approach the door. Second determination means for determining whether or not the information storage medium is approaching the door;
Further comprising
When the second determination unit determines that the information storage medium is approaching the door, the lock control unit is configured to store identification information included in the information storage medium in the storage device. The unlocking device according to claim 7, wherein the electric lock is unlocked.

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