JP2011052387A - Control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device which controls a door to allow a person to come in and out to use a grace period being a fixed period for performing any processing such as automatic locking of the door while the door remains closed after the fixed period and starting to inform while the door remains open after the fixed period after the fixed period by conforming to actual situation of use and situation of operation without deciding the grace period depending on the experience of a manager of a coming-in-and-out management system. <P>SOLUTION: In this control device, the time when an event occurs is extracted from log, and the grace period is updated based on the difference in time between the door opening time when a user opens the door actually and the time when the event occurs. For example, the grace period until the door is automatically locked while the door remains closed is updated based on the difference in time between the unlocking time and the door opening time. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to door control in an entrance / exit management system.

  In an entrance / exit management system for managing entry / exit into a room to be secured, entry / exit into each room can be controlled by a lockable door. For each room, a control device that controls the door and an authentication device that reads the authentication information are installed, and the control device performs authentication based on the authentication information read by the authentication device, and according to the authentication result The door is locked and unlocked. If authentication is successful and the door is unlocked, the user entering or leaving the room can open or close the door.

  To ensure security, the control device automatically locks the door when it is unlocked or sounds an alarm when the door is left open. However, if the door is unlocked and locked immediately, the door cannot be opened, and it is only annoying to sound an alarm as soon as the door is opened. Or perform a process such as sounding an alarm. Different values are set for the contents of these processes for the predetermined time. In the following, this fixed time is referred to as a grace time in the sense of the time given before processing.

  Conventionally, the grace time is a value that is used when the entrance / exit management system is installed, or a value that is changed by experience by the manager of the entrance / exit management system.

Japanese Patent Laid-Open No. 5-179846

However, the optimum value of the grace time varies depending on the installation environment and user of the entrance / exit management system, the security policy, and the like.
For example, if the door is left open without being unlocked after the door is unlocked, the distance from the authentication device to the door is In a short place, there is no problem even if locking is performed in a short time, but in a place where the distance from the authentication device to the door is long, there is a problem that if the locking is performed in a short time, the door is locked before the door is opened. On the other hand, if the grace time until locking is lengthened, the time that the door is left in the unlocked state becomes longer, which causes a security problem.

Therefore, in order to determine the optimum value, it takes time and effort for the manager of the entrance / exit management system to search by trial and error, such as operating for a while after changing the set value.
It is an object of the present invention to provide a control device that determines the grace time when performing control to perform some processing after the grace time as described above according to the use status and the operation status as optimally as possible.

  In order to solve the above problems, a control device of the present invention is a control device that controls a door, and associates an opening / closing detection unit that detects opening / closing of a door, an event type, and the occurrence time of the event. The recorded log, a storage unit for storing a grace period indicating the time from the occurrence time when the event of the first type occurred to the scheduled occurrence time when the event of the second type should occur, and the first type When the second type event does not occur even after the grace period has elapsed since the occurrence of the event, the execution unit that executes a predetermined process related to door control, and the log, A plurality of combinations of the occurrence time of the event of the second type and the occurrence time of the most recent event of the first type before the occurrence time of the event of the second type are extracted, and for each of the extracted sets, the first The second from the time of occurrence of the event of type An update unit that calculates a time until the occurrence time of the event of the type, and updates the grace time to an update value determined based on the calculated time. A door opening time that is an occurrence time of an event indicating that it has been detected is included, and either the first type event or the second type event is detected by the open / close detection unit It is an event indicating that it has been detected that has been opened.

According to the above control device, the log of the grace time for performing the predetermined processing when the grace time elapses from the occurrence of the first type of event to the occurrence of the second type of event. Therefore, the setting of the grace time can be changed to a value according to the actual usage status and operation status, not a value determined based on experience.
Since the log used for calculating the grace time includes the door opening time when the user opened the door, the user's operation can be reflected in the set value of the grace time.

  Here, the control device further includes a locking / unlocking unit that locks / unlocks the door, and the log includes a release time indicating an event occurrence time indicating that the locking / unlocking unit has unlocked the door. A lock time is included, and the grace time indicates the time from the unlock time to the scheduled lock time when the door lock should be locked when the door continues to be closed even when the door lock is unlocked. 1 lock grace time, the first type of event is an event indicating that the lock / unlock unit has unlocked the door, and the second type of event is the door detection unit An event indicating that it has been opened, and the predetermined process is a process of locking the door by the locking / unlocking part, and the updated value of the first locking grace time updated by the updating part The time from the unlocking time to the door opening time is less than the updated value with respect to the total number of the sets. The ratio of the number of a certain set may be a value that is a predetermined ratio or more.

  Even if the door is unlocked, if the door is not opened, the first lock grace time until it is automatically locked is calculated based on the unlock time recorded in the log and the door open time. Therefore, the first lock grace time is too short and the door is locked before opening the door, or the first lock grace time is too long and the door is left in the unlocked state for a long time, security. In order not to cause any problems, the setting of the first lock grace time can be changed to a value according to the actual usage status and operational status.

  Here, the control device further includes a locking / unlocking unit that locks / unlocks the door, and an authentication unit that performs authentication related to entry / exit, and the log includes the locking / unlocking unit unlocking the door lock. An unlocking time that is an occurrence time of an event indicating that the authentication unit has been authenticated, and an authentication time that is an occurrence time of an event indicating that the authentication unit has been authenticated, and the grace time is when the door is opened When the authentication is successful, this is the second lock grace time indicating the time from the authentication time to the scheduled lock time to lock the door. The first type of event is successfully authenticated by the authentication unit. The second type event is an event indicating that the opening / closing detection unit has detected that the door has been opened, and the predetermined processing is performed from the authentication time to the second time. The scheduled locking time during the locking grace time is determined from the authentication time. It is a process to postpone until the time when only the second locking grace time has elapsed, and the update value of the second locking grace time updated by the update unit is from the authentication time to the door opening time with respect to the total number of the sets. The ratio of the number of pairs whose time is less than or equal to the update value may be a value that is greater than or equal to a predetermined ratio.

  When a user enters a room continuously, the next person authenticates when the previous person is open and the door is closed while the next person moves to the door. The door lock may be locked before the person opens the door. If authentication is performed when the door is open, the above situation can be prevented by not locking until the second lock grace period elapses after authentication. Continuous entry can be performed smoothly. In addition, since the second lock grace time is calculated based on the authentication time recorded in the log and the door opening time, the second lock grace time is too short and the door is locked before opening the door, The second locking grace period is too long, and the door is left in the unlocked state for a long time, so that the second locking is set to a value that matches the actual usage and operational conditions so that there is no security problem. You can change the grace time setting.

  Here, the predetermined process is a process of instructing the start of caution notification to the fact that the door is kept open, and it is detected in the log that the opening / closing detection unit is closed. Includes a door closing time, which is an occurrence time of the event, and the grace time is a time from the door opening time to a caution notification start scheduled time to instruct the start of caution notification when the door is kept open. The first type of event is an event indicating that the opening / closing detection unit has detected that the door has been opened, and the second type of event is the detection of opening / closing. This is an event indicating that the part has detected that the door is closed, and the update value of the caution notice postponement time updated by the update part is from the door opening time to the door closing time with respect to the total number of the sets. The number of pairs whose time is greater than or equal to the updated value If it may be a value equal to or less than a predetermined ratio.

  When the door is left open for a long period of time, a warning is issued to alert the user to make a sound, etc., but the notice alert grace time until the notification is started is recorded in the log. By calculating based on the door opening time and the door closing time, the caution notice grace time is too short, the notification sound becomes annoying, the caution notice grace time is too long, and the door was opened It is possible to change the setting of the caution notice postponement time to a value according to the actual usage status and operational status so that it will not be left as it is for a long time.

  Here, the log includes a warning notification start time that is an occurrence time of an event indicating that the execution unit has instructed to start a warning notification, and the execution unit further includes a warning notification from the attention notification start time. When the time elapses, a process for instructing the end of caution notification and a process for instructing the start of warning notification are executed. The caution notification time starts from the door opening time when the door is kept open. Is the difference between the warning notification postponement time indicating the time until the warning notification start scheduled time and the attention notification postponement time, the warning notification postponement time is updated by the updating unit, and the updating unit updates The update value of the alarm notification postponement time is a value in which the ratio of the number of groups in which the time from the door open time to the door close time is equal to or greater than the update value is smaller than the predetermined ratio with respect to the total number of the groups. Is the following value It may be.

  The notification is made up of two stages of caution notification and warning notification, and not only the caution notification grace time but also the warning notification grace time is calculated based on the door opening time and the door closing time recorded in the log. , The warning notification grace time is too short, the warning notification time is too short, or the warning notification grace time is too long, leaving the door open for a long time, which is a security problem In order to prevent this from happening, the setting of the warning notification postponement time can be changed to a value according to the actual usage status and operation status.

Here, the execution unit may instruct the end of alarm notification when a time equal to or greater than a maximum value of the time from the door opening time to the door closing time has elapsed in the log from the door opening time.
Even if the door is left open for some reason, the maximum notification, which is the maximum value of the notification duration, is to stop the notification after a certain period of time so that the warning notification will not sound forever. By calculating the time based on the door opening time and the door closing time recorded in the log, the duration of the notification is too short, making the meaning of the notification meaningless, or the duration of the notification is too long The setting of the maximum leaving time can be changed to a value according to the actual use situation and operation situation so that the notification sound does not become annoying.

Configuration diagram of control device in embodiment 1 Diagram explaining the first lock grace time The figure explaining the determination method of the update value of the 1st lock postponement time The figure which shows operation | movement of the control apparatus in Embodiment 1. The figure which shows the update operation | movement of the 1st lock postponement time in Embodiment 1. Diagram explaining second lock grace time The figure explaining the determination method of the update value of the 2nd lock postponement time The figure which shows operation | movement of the control apparatus in Embodiment 2. The figure which shows the update operation | movement of the 2nd lock postponement time in Embodiment 2. Configuration diagram of control device in embodiment 3 Illustration explaining the notice delay time The figure explaining the determination method of the update value of notification postponement time The figure which shows operation | movement of the control apparatus in Embodiment 3 (1) The figure which shows operation | movement of the control apparatus in Embodiment 3 (2) The figure which shows the update operation | movement of the notification postponement time in Embodiment 3. The figure which shows the update operation | movement of the maximum alerting time in Embodiment 3.

Embodiment 1
In this embodiment, when the user succeeds in authentication and the control device unlocks the door, the control device is fixed when the door is left open without being opened by the user. An example of automatically locking after a time will be described. Hereinafter, the fixed time in this case is referred to as a first locking grace time.
<Constitution>
The configuration of the control device 100 in the present embodiment is shown in FIG. The control device 100 in this embodiment is one component of an entrance / exit management system configured by combining the door 200 and the authentication device 300. The control device 100 is a device that controls the door 200 that can be locked and unlocked, and is installed in each room together with the authentication device 300 that reads authentication information. Control of the door 200 by the control device 100 is performed based on authentication information received from the authentication device 300.

The door 200 is provided with a lock 201 that can be unlocked and locked by the control device 100. When the door is unlocked, the user can manually open and close the door. .
The authentication device 300 is an interface for reading authentication information such as a card reader, and includes a reading unit 301 for reading authentication information including a user ID from an authentication card distributed to a user in advance. When reading unit 301 reads the authentication information, reading unit 301 transmits the read authentication information to authentication unit 103 of control device 100.

The control device 100 includes a storage unit 104, an authentication unit 103, a locking / unlocking unit 102, an open / close detection unit 101, an update unit 105, and an execution unit 106. Hereinafter, each component of the control device 100 will be described.
・ Storage unit 104
The storage unit 104 is a recording medium, and stores a log that records an event type generated when the control device 100 controls the door 200 in association with an event occurrence time. Here, the event includes an authentication event indicating that authentication has been performed, an unlocking event or locking event indicating that the lock 201 of the door 200 has been unlocked or locked, and a door indicating that the opening and closing of the door 200 has been detected. There are opening events and door closing events. The authentication event includes an authentication success event indicating that the authentication has succeeded and an authentication failure event indicating that the authentication has failed. In addition, the storage unit 104 stores the first locking grace time. Although the initial value of the first locking grace period is a predetermined value, when updated by the updating unit 105, the updated value is stored in the storage unit 104.

  FIG. 2 (a) is a diagram showing the first locking suspension time and the events that occur in time series. Fig. 2 (a) shows that when the authentication is successful by the person with user ID A and the door 200 remains unopened even if the lock 201 of the door 200 is unlocked, only the first lock grace period is reached. It shows that it locks automatically when it passes. The first lock grace time is the time from the unlocking time at which the unlocking event occurs to the scheduled locking time at which the locking event should occur without the door opening event occurring.

Fig. 2 (b) shows the log of each event that occurs in Fig. 2 (a). In this example, assuming that the first lock grace time is 30 seconds and the time when authentication by the user ID A is successful is 0:00:00, unlocking is performed 1 second after successful authentication, The door is unlocked when 30 seconds pass without opening.
・ Authentication part 103
The authentication unit 103 has a function of receiving authentication information transmitted from the authentication device 300 and authenticating whether the user is permitted to enter or exit. If the authentication is successful, the authentication unit 103 records that the authentication is successful and the authentication time in a log together with the user ID, and further unlocks the lock 201 of the door 200 to the locking / unlocking unit 102. To instruct. If the authentication fails, the authentication failure is associated with the authentication time and recorded in the log together with the user ID.
・ Locking / unlocking part 102
The locking / unlocking unit 102 has a function of controlling the locking / unlocking of the lock 201 of the door 200. When receiving the unlocking instruction from the authentication unit 103, the locking / unlocking unit 102 unlocks the lock 201 of the door 200, and transmits the unlocking time and unlocking time of the door 200 to the execution unit 106. The unlocking of the lock 201 of the door 200 and the unlocking time are recorded in the log in association with each other. Also, when the unlocking / unlocking unit 102 is notified by the opening / closing detection unit 101 that it has detected that the door 200 has been closed, or when the execution unit 106 has received an instruction to lock the lock 201 of the door 200 The lock 201 of the door 200 is locked, the lock of the lock 201 of the door 200 and the lock time are transmitted to the execution unit 106, and the lock of the lock 201 of the door 200 and the lock time are associated with each other in the log. Record.
Open / close detection unit 101
The opening / closing detection unit 101 has a function of detecting opening / closing of the door 200. When the opening / closing detection unit 101 detects that the door 200 is opened, the opening / closing detection unit 101 records the information in the log in association with the opening of the door 200 and the door opening time. Further, when the opening / closing detection unit 101 detects that the door 200 is closed, it records in a log in association with the closing of the door 200 and the door closing time, and the lock / unlock unit 102 stores the lock 201 of the door 200. Instruct to lock.

The opening / closing detection is realized by, for example, a limit switch, and the opening / closing state can be detected as an electric signal by installing the switch so that the switch is mechanically pressed by opening / closing the door. Alternatively, the opening / closing state may be detected by any method, such as detecting the opening / closing state as an electric signal by installing a set of permanent magnets on the movable part of the door.
・ Update part 105
The update unit 105 reads the log from the storage unit 104, calculates an updated value of the first lock grace time based on the event type and event occurrence time recorded in the log, and stores the first lock stored in the storage unit 104 It has a function to update the update time to the calculated update time. The update is performed during the idle time in which the authentication unit 103 is waiting to receive the authentication information. A method for calculating the update value of the first locking postponement time will be described later.
Execution unit 106
The execution unit 106 receives the unlocking and unlocking time of the lock 201 of the door 200 from the locking / unlocking unit 102 until receiving the locking and unlocking time of the lock 201 of the door 200. Perform the operation. That is, the first locking delay time stored in the storage unit 104 is read, the elapsed time from the locking time to the current time is compared with the first locking delay time, and the elapsed time from the locking time to the current time is compared with the first locking delay time. If the time is exceeded, the locking / unlocking unit 102 is instructed to lock the lock 201 of the door 200.
<Calculation of the updated value of the first lock grace time>
Here, a method for calculating the update value of the first locking postponement time will be described.

The first lock grace time is a time until the lock is automatically performed when the user is successfully authenticated and the door 200 is not opened after the lock 201 of the door 200 is unlocked. Therefore, the first locking window is calculated based on the first door opening window after the lock 201 of the door 200 is unlocked until the door 200 is opened.
FIG. 2 (c) is a diagram showing, in chronological order, the first door opening delay time and the events that occur when the user enters the room. When a user enters a room, an authentication event is first generated, and if the authentication is successful, an unlocking event is generated. After unlocking, the user moves from the position where the authentication device 300 is installed to the position of the door 200 and opens the door 200, thereby generating a door opening event. After the user enters the room, the door closing event occurs when the door 200 is closed. The first door opening grace time is the time from the unlocking time when the unlocking event occurs to the door opening time when the door opening event occurs.

  To calculate the update value of the first lock postponement time, first, extract the set of consecutive unlocking events and door opening events as described above from the log, and calculate the difference between the door opening time and the unlocking time for each pair. Calculate and calculate the first door opening time. Subsequently, the distribution of the first door opening time calculated for each group is calculated. Assuming that the time resolution that determines the accuracy of the first lock grace time is Δt, the distribution is calculated by dividing the time axis by the time width Δt, and 0 to Δt, Δt to 2Δt, 2Δt to 3Δt, ..., kΔt to (k +1) Δt (k = 0, 1, 2, ..) This is done by counting the number of groups in which the first door opening time is included in each division width. This can be represented by creating a histogram as shown in FIG.

  In Fig. 3, the time width Δt is 1 second, and the number of pairs in which the door opening time is included in the time width every 1 second in the range of 0 to 30 seconds is counted. Since the first door grace time does not exceed the first locking grace time, the first locking grace time before renewal can be selected as the maximum value of the time range. Here, the initial value of the first lock grace period is 30 seconds. Figure 3 shows that most users open the door approximately 17-18 seconds after unlocking, and all users open the door within 28 seconds after unlocking. .

The updated value of the first locking grace time is determined so that the ratio of the first door opening grace time being equal to or less than the updated value in the histogram of FIG. Here, if the threshold is 95%, for example, the updated value of the first door opening delay time is 23 seconds. This threshold is set so that 95% of people who open the door earlier in the total number of users can open the door before it is automatically locked. 5% of people who are slow to open the door are pre-determined values with the intention that they are automatically locked before opening the door.
<Operation>
The operation of the control device 100 in the present embodiment will be described using the flowchart of FIG.

First, the authentication device 300 waits for the authentication unit 103 to receive the authentication information read by the reading unit 301 (S401).
When the authentication unit 103 receives the authentication information (S401 Y), it determines whether or not the authentication is successful (S402).
If the authentication is successful (S402 Y), the authentication unit 103 stores information that associates the authentication time with the authentication success and the user ID that has been successfully authenticated, in the log stored in the storage unit 104. Record (S403).

Subsequently, the authentication unit 103 instructs the locking / unlocking unit 102 to unlock the lock 201 of the door 200 (S405). When the lock 201 of the door 200 is unlocked, the locking / unlocking unit 102 records information in which the unlocking time is associated with the unlocking of the lock 201 of the door 200 in a log stored in the storage unit 104 ( S406).
Next, when the opening / closing detection unit 101 detects that the door 200 has been opened (S407 Y), information that associates the door opening time with the detection that the door 200 has been opened is stored in the storage unit 104. Is recorded in the log stored in (S408).

Next, the open / close detection unit 101 waits to detect that the door 200 is closed (S409 N), and when the open / close detection unit 101 detects that the door 200 is closed (S409 Y), the door closes. Information that associates the time with the detection that the door 200 has been closed is recorded in the log stored in the storage unit 104 (S410).
Subsequently, the opening / closing detection unit 101 instructs the locking / unlocking unit 102 to lock the lock 201 of the door 200 (S411).

When the lock 201 of the door 200 is locked, the locking / unlocking unit 102 records information in which the locking time is associated with the locking of the lock 201 of the door 200 in the log stored in the storage unit 104 (S412), The process returns to waiting for receiving authentication information (S401).
When the opening / closing detection unit 101 does not detect that the door 200 has been opened (S407 N), it is determined whether or not the first locking grace time has elapsed from the unlocking time (S413), and only the first locking grace time Until the time elapses (S413 N), the process returns to the door open detection waiting state (S407). When the first lock grace time elapses from the unlocking time (Y in S413), the unlocking unit 102 locks the lock 201 of the door 200 based on the instruction from the opening / closing detection unit 101 (S411).

If the authentication unit 103 receives the authentication information (S401 Y) and the authentication fails (S402 N), the authentication unit 103 indicates that the authentication time and the authentication have failed, and the user who has failed the authentication. The information associated with the ID is recorded in a log stored in the storage unit 104 (S404), and the process returns to the waiting for authentication (S401).
If the authentication unit 103 does not receive the authentication information (S401 N), the first locking grace period is updated based on the logs stored in the storage unit 104 so far (S414).

As described above, the control device 100 in the present embodiment operates.
<Renewal operation of the first lock grace period>
The update operation of the first locking postponement time will be described using the flowchart of FIG.
First, the elements of the first door opening delay time array T1 (i) that stores the first door opening delay time classified and stored for each time range are initialized to 0 (S501).

A set of the unlocking time t1 and the door opening time t2 is read from the log, and the first door opening delay time (t2-t1) is calculated for each set (S502).
When the time resolution is Δt, the first door opening delay time (t2-t1) is incremented by an element T1 (k) of the array for a non-negative integer k that is greater than or equal to kΔt and less than (k + 1) Δt (S503) . By performing this operation for all combinations of unlocking times and door opening times read from the log, an array T1 (i) in which the first door opening grace time is classified according to the width of the time interval Δt is calculated. For example, if the time resolution Δt is set to 1 second, the updated value of the first locking grace time can be determined with an accuracy of 1 second.

The sum of all the elements of the calculated array T1 (i) is taken as N (S504).
A minimum n is calculated such that the ratio of the sum of elements of array T1 (i) where i ≦ n to N is equal to or greater than a threshold (S505). Here, the threshold is, for example, 95%.
Using the n determined as described above, the first lock delay time is set to nΔt (S506).
Embodiment 2
When the user enters the room continuously, the previous person succeeds in authentication, and after the door is unlocked, the next person succeeds in authentication while the door is opened, and the next person While moving to the door, the door opened by the previous person may be closed. To ensure security, it is desirable to lock the door immediately after it is closed, but if you do so, the door lock will be automatically locked before the next person opens the door. Will have to re-authenticate and unlock the door.

In the present embodiment, an example of a case where locking is not performed for a certain period of time from the authentication time when authentication is successful when the door is open will be described so that the above does not occur. Hereinafter, this fixed time is referred to as a second locking grace time.
Since the second locking delay time and the first locking delay time described in the first embodiment are not exclusive, the control device in the present embodiment adds the above function to the control device 100 in the first embodiment. It is explained as a thing.
<Constitution>
The configuration of the control device 100 in the present embodiment is the same as the configuration of the control device 100 in the first embodiment shown in FIG. 1, but each component is different in the following points.

First, the storage unit 104 stores a second locking grace time in addition to the log and the first locking grace time.
FIG. 6 (a) is a diagram showing the second locking suspension time and the events that occur in time series.
First, an authentication success event by the person with user ID A occurs, and then an unlock event occurs. Next, a door opening event that detects that the person with user ID A opens the door occurs. After that, it is assumed that the authentication success event by the user ID B occurs before the door closes and the door closing event occurs. Under the specification of locking immediately when the door is closed, when the person with user ID A finishes entering the room and closes the door, the door is locked at the scheduled locking time A. Then, the person with user ID B must authenticate and unlock again to open the door at a later time. Since this is inconvenient, the control device 100 in this embodiment postpones the scheduled locking time A to the scheduled locking time B. In this way, the person with user ID B can open the door even after the scheduled locking time A. The postponement time is measured from the authentication success time of the person with the user ID B as the second lock grace time. Even if the door is opened and closed before the scheduled locking time B and the door opening and closing events occur, all the locking events are postponed until the scheduled locking time B. If the door is opened at the scheduled locking time B, the locking is performed after the door is closed after the scheduled locking time B.

  The log of each event that occurs in Fig. 6 (a) is shown in Fig. 6 (b). In this example, the second lock grace period is 30 seconds, the time when authentication by the user ID A is successful is 0:00:00, and 1 second after the authentication by the user ID A is successful. After 15 seconds, the door is opened by the person with user ID A. After 3 seconds, the user ID B has been successfully authenticated before the door is closed, and user ID B The door is closed 2 seconds after successful authentication. Under the specification that the door is locked immediately when it is closed, the door is locked from 00:00:21 when the door is closed, for example, at 00:00:22 one second later. Locking is not performed between 00:00:19 when authentication by user ID B is successful and 00:00:49 when the second lock grace period has elapsed. Thus, the user ID B can open the door 8 seconds after the door is closed. Even if it is closed 10 seconds after that, it will not be locked immediately, and will be locked at time 00:00:49 when the second lock grace period has elapsed after successful authentication by the user ID B.

The second locking grace time is updated by the updating unit 105 in the same manner as the first locking grace time. A method for updating the second locking postponement time will be described later.
In addition to the locking instruction based on the first locking suspension time described in the first embodiment, the execution unit 106 also instructs locking postponement based on the second locking suspension time.
That is, when the authentication is successful, the authentication unit 103 transmits the authentication success and the authentication time to the execution unit 106, and the execution unit 106 receives the authentication success and the authentication time from the authentication unit 103. When received, the log stored in the storage unit 104 is read to determine whether the door 200 is open or closed. As a result, if the door 200 is open at the time of authentication, the second lock grace time is read from the storage unit 104, and the lock instruction received from the authentication time until the second lock grace time elapses from the authentication time. The locking / unlocking unit 102 is instructed to postpone until the time when the second locking grace period has elapsed. The locking / unlocking unit 102 postpones locking according to the instruction from the execution unit 106.
<Calculation of the updated value of the second lock grace time>
Here, a method of calculating the update value of the second locking postponement time will be described.

The second lock grace time is a time taken for the authentication device 300 to perform authentication, move from the position where the authentication device 300 is located to the position where the door 200 is located, and open the door 200. Therefore, the second locking window is calculated based on the second door opening window after the authentication is performed until the door 200 is opened.
FIG. 6 (c) is a diagram showing the grace period for the second door and events that occur when the user enters the room in time series. The second door opening grace time is the time from the authentication time when the authentication event occurs until the door opening time when the door opening event occurs.

  The calculation of the updated value of the second locking grace time is substantially the same as the calculation of the updated value of the first locking grace time. As described in the first embodiment, in calculating the update value of the first locking grace period, a set of the unlocking event and the door opening event is extracted from the log, and the first door opening from the unlocking time to the door opening time is extracted. The update value was determined from the distribution of the grace time. On the other hand, in calculating the update value of the second lock grace time, a set of authentication events and door opening events is extracted from the log, and updated from the distribution of the second door grace time from the authentication time to the door opening time. Determine the value.

The distribution of the grace time for the second door is based on the time on the horizontal axis, the grace time for the second door from the authentication time to the door opening time, instead of the first door grace time from the unlocking time to the door opening time. By doing so, a histogram can be created in the same way as in FIG. 3, and the updated value of the second locking grace time is the minimum value at which the ratio that the second door opening grace time is less than or equal to the updated value is equal to or greater than the threshold value. To be determined.
<Operation>
The operation of the control device 100 in the present embodiment will be described using the flowchart of FIG. The difference between FIG. 8 and FIG. 4 is the operation and authentication from when the opening / closing detection unit 101 detects that the door 200 is closed until the locking / unlocking unit 102 locks the lock 201 of the door 200. Since the update of the lock grace time performed while not receiving information is to update not only the first lock grace time but also the second lock grace time, only these different parts will be described here.

In the control device 100 in the present embodiment, the open / close detection unit 101 detects that the door 200 is opened (S807 Y), and associates the door opening time with the detection that the door 200 is opened. When the information is recorded in the log stored in the storage unit 104 (S808), the open / close detection unit 101 waits for the door 200 to be closed (S812 N).
If the opening / closing detection unit 101 detects that the door 200 is closed (S812 Y), the storage unit 104 stores information that associates the door closing time with the detection that the door 200 is closed. Is recorded in the logged log (S813).

Next, it is determined whether or not the latest authentication time has been changed (S821). This is done by comparing the latest authentication time read from the log stored in the storage unit 104 with the authentication time recorded in step S803.
If the latest authentication time has not been changed (S821 N), the locking / unlocking unit 102 locks the lock 201 of the door 200 (S818). The subsequent steps are the same as those in FIG.

  If the latest authentication time has been changed (S821 Y), even if the door is closed, the door is not locked immediately, but waits until the second lock grace time elapses from the latest authentication time (S814 N). Here, the latest authentication time is confirmed by reading the latest authentication time from the log stored in the storage unit 104 each time. Therefore, even if the user performs authentication one after another, the user is not locked until the second lock grace time elapses from the authentication time of the last authenticated user. If the second lock grace time elapses from the latest authentication time (S814 Y), the locking / unlocking unit 102 locks the lock 201 of the door 200 (S818). The subsequent steps are the same as those in FIG.

In the control device 100 according to the present embodiment, since the door 200 is controlled using the second locking grace time in addition to the first locking grace time, when the authentication information is not received (S801 N), Based on the log stored in the storage unit 104, the update of the first locking delay time (S821) and the update of the second locking delay time are performed (S822).
<Update operation of the second lock grace period>
The update operation of the second locking postponement time will be described using the flowchart of FIG.

The update operation of the second lock window time is substantially the same as the update operation of the first lock window time shown in FIG. The difference is that the update of the first lock grace time calculates the first door grace time from the unlock time t1 to the door open time t2, whereas the update of the second lock grace time calculates the authentication time t0. This is a point to calculate the second door opening grace time from to the door opening time t2.
First, the elements of the second door opening delay time array T0 (i) that stores the second door opening delay time classified and stored for each time range are initialized to 0 (S901).

A pair of the authentication time t0 and the door opening time t2 is read from the log, and the second door opening delay time (t2-t0) is calculated for each pair (S902).
With the time resolution as Δt, the array element T0 (k) is incremented for the non-negative integer k for which the second door opening time (t2-t0) is greater than or equal to kΔt and less than (k + 1) Δt (S903) . By performing this for all authentication time and door opening time pairs read from the log, an array T0 (i) in which the second door opening grace time is classified by the width of the time interval Δt is calculated. If the time resolution Δt is set to 1 second, for example, the updated value of the second locking grace time can be determined with an accuracy of 1 second.

The sum of all the elements of the calculated array T0 (i) is taken as N (S904).
The smallest n is calculated such that the ratio of the sum of elements i ≦ n of the array T0 (i) to N is greater than or equal to the threshold (S905). Here, the threshold is, for example, 95%.
Using the n determined as described above, the second lock delay time is set to nΔt (S906).
Embodiment 3
This embodiment demonstrates the example which alert | reports, when the door has been opened. The notification is made up of two stages. First, a warning notification is given to alert the user, and then a warning notification is given. For example, when making a notification by sounding, a warning notification of a small sound is first given, and if the door is still not closed, a warning notification is given with a loud sound. The warning notification will stop after it rings for a while. Hereinafter, the time from the opening of the door to the start of warning notification is referred to as the warning notification postponement time, and the time from the opening of the door to the start of warning notification is referred to as the warning notification postponement time. Call time. Moreover, the maximum value of the time for which the caution notification and the warning notification are continued is referred to as the maximum caution notification time and the maximum warning notification time, respectively, and these are collectively referred to as the maximum notification time.

Since the control related to the notification and the control related to automatic locking described in the first embodiment are not exclusive, the control device according to the present embodiment has a function of performing control related to the notification to the control device 100 according to the first embodiment. It demonstrates as what added.
<Constitution>
The configuration of the control device 100 in the present embodiment is substantially the same as the configuration of the control device 100 in the first embodiment shown in FIG. 1, but as shown in FIG. The unit 106 is configured to output a notification-related instruction to the notification unit 302 according to the open / close state of the door 200. The notification unit 302 has a function of generating two types of notification sounds in order to perform caution notification and warning notification. The type of notification sound is distinguished by the volume, height, length, and pattern of the sound. The notification unit 302 includes a speaker, and receives a warning notification and warning notification start and end instructions from the execution unit 106 of the control device 100, and emits a warning notification sound and a warning notification sound from the speaker, respectively.

  The storage unit 104 stores a warning notification postponement time and a warning notification postponement time in addition to the log and the first locking postponement time. Further, the storage unit 104 stores the maximum warning notification time as the maximum notification time. As will be described later, the maximum notification time is required only for the warning notification, which is the latter notification of the two notifications, and therefore the maximum attention notification time needs to be stored in the storage unit 104. Absent.

FIG. 11 (a) is a diagram showing the notification postponement time and the events that occur in time series.
First, an authentication success event by the person with user ID A occurs, and then an unlock event occurs. Next, a door opening event that detects that the person with user ID A opens the door occurs. If the door is not closed until the time when the caution notification time has elapsed after the door is opened, the caution notification is started. After the warning notification is started, if the door is not closed until the time when the warning notification time has elapsed after the door is opened, the warning notification is terminated and the warning notification is started. The caution notification time is from the caution notification start time at which the caution notification is started to the caution notification end time at which the caution notification is ended. When the maximum notification time has elapsed after the warning notification is started, the warning notification is terminated. The warning notification time from the warning notification start time when the warning notification is started to the warning notification end time when the warning notification is ended coincides with the maximum warning notification time.

  FIG. 11 (b) shows a log of each event that occurs in FIG. 11 (a). In this example, the alert notification grace time is 15 seconds, the warning notification grace time is 20 seconds, the maximum warning notification time is 10 seconds, and the time when authentication by the user ID A is successful is 0:00:00. Unlocking is performed 1 second after successful authentication by the person of ID A, and the door is opened by the person of user ID A 15 seconds later, and then the door is not closed. At the time 00:00:31 when 15 seconds have passed since the grace notice notice time starts, the notice notice starts. Furthermore, if the door cannot be closed, the warning notification is terminated at 00:00:36 when the warning notification delay time 20 seconds has elapsed since the door was opened, and a warning notification is issued. The warning notification ends at 00:00:41 when the maximum warning notification time of 10 seconds has elapsed since the warning notification was started.

The update unit 105 updates the notification grace time and the maximum notification time in the same manner as the first locking grace time. A method for updating the notification postponement time and the maximum notification time will be described later.
The execution unit 106 issues a notification instruction to the notification unit 302 in addition to the locking instruction based on the first locking delay time described in the first embodiment.
That is, when the opening / closing detection unit 101 detects that the door 200 has been opened, the opening / closing detection unit 101 transmits the opening of the door 200 and the door opening time to the execution unit 106. When the execution unit 106 receives the opening of the door 200 and the door opening time, the following operation is performed until the opening / closing detection unit 101 receives the opening of the door 200 and the door closing time. That is, the notification postponement time and the maximum notification time are read from the storage unit 104, the time from the door opening time to the current time is compared with the attention notification postponement time, and the time from the door opening time to the current time is compared. Is exceeded, the notification unit 302 is instructed to start caution notification. Also, the time from the door opening time to the current time is compared with the warning notification grace time, and if the time from the door opening time to the current time exceeds the warning notification grace time, the warning notification is terminated to the notification unit 302 and the warning is issued. Instruct to start notification. Further, the time from the warning notification start time to the current time is compared with the maximum warning notification time, and if the time from the warning notification start time to the current time exceeds the maximum warning notification time, the warning notification is terminated in the notification unit 302. To instruct.
<Calculation of update value of notification grace time>
Here, a method for calculating the update value of the notification postponement time will be described. The notification grace time includes a caution notification grace time and a warning notification grace time. However, since only the threshold values used for the calculation are different, the notification grace time will generally be described as the notification grace time.

The notification grace time is the time from when the user opens the door 200 until the notification starts when the door 200 is not closed. Therefore, the notification time is calculated based on the door opening time that is required from when the door 200 is opened until the door 200 is closed.
FIG. 11 (c) is a diagram showing, in chronological order, the door opening time and events that occur when the user enters the room. The door opening time is the time from the door opening time when the door opening event occurs to the door closing time when the door closing event occurs.

The calculation of the update value of the notification grace time is similar to the calculation of the update value of the first lock grace time, and a set of events is extracted from the log, and the update value is determined from the distribution of time between event occurrence times. Although a method is used, as will be described below, a target event set and a threshold value are different.
The update value of the notification grace time is calculated by first extracting a set of consecutive door opening events and door closing events from the log, calculating the difference between the door closing time and the door opening time for each set, and calculating the door opening time. Ask for. Subsequently, the distribution of door opening times obtained for each group is calculated. The calculation of the distribution is the same as the calculation of the update value of the first locking grace time described in the first embodiment, and the time axis is divided by the time width Δt, and the number of pairs in which the door opening time is included in each divided width is counted. That is done. This can be represented by creating a histogram as shown in FIG.

  The update value of the notification postponement time is determined so that the ratio of the door opening time being equal to or greater than the update value in the histogram of FIG. Here, for example, if the threshold is 30% for the warning notification time, the warning notification grace time is 15 seconds. For example, if the warning notification time is 10%, the warning notification postponement time is 20 seconds. This threshold is used to alert 30% of the total number of users who have the doors open for the longest, and the time to open the doors out of the total number of users. This is a predetermined value based on the intention of alerting 10% of people from the longest.

By making the threshold value for the warning notification time smaller than the threshold value for the warning notification time, it is guaranteed that the warning notification postponement time becomes longer than the warning notification postponement time.
<Calculation of update value of maximum notification time>
Here, a method for calculating the update value of the maximum notification time will be described. The notification grace time includes a maximum caution notification grace time and a maximum warning notification grace time. However, since only the threshold values used for the calculation are different from each other, the following description is generally made as the maximum notification time. To do.

Since the notification is intended to inform the user that the door 200 is opened, there is not much meaning to continue the notification until a time has passed so that any user closes the door 200. Therefore, it is considered sufficient that the maximum notification time is long enough to notify the person with the longest door opening time.
That is, the update value of the maximum notification time is calculated as follows. First, a set of consecutive door opening events and door closing events is extracted from the log, and the difference between the door closing time and the door opening time is calculated for each group to obtain the door opening time. Next, the maximum value of the door opening time is obtained, and the difference ΔT from the notification grace time is obtained. Time ΔT is the time from the notification start time until the person with the longest door opening time closes the door. The updated value of the maximum notification time is the value αΔT obtained by multiplying the time ΔT by a real number α of 1 or more. The reason why the real number α is multiplied is that the notification is continued until a little later than the time when the person with the longest door opening time closes the door. The value of the real number α is, for example, about 1.2.

As described above, the warning notification postponement time is guaranteed to be longer than the warning notification postponement time by making the threshold for the warning notification postponement time smaller than the threshold for the warning notification postponement time. Therefore, the maximum caution notification time is longer than the maximum warning notification time. Therefore, the warning notification is always started before the warning notification time exceeds the maximum warning notification time, and the warning notification is ended at that time. Therefore, the maximum warning notification time is not actually used. Therefore, only the maximum warning notification time needs to be stored in the storage unit 104.
<Operation>
The operation of the control device 100 in this embodiment will be described using the flowcharts of FIGS. The difference between FIGS. 13 and 14 and FIG. 4 is that the opening / closing detection unit 101 detects that the door 200 has been opened and then does not detect that the door 200 has been closed, and authentication information. Since the update performed while not receiving the update is not only the first lock grace time, but also the caution notice grace time, the warning notice grace time, and the maximum warning notice time, only here for these different parts explain.

  In the control device 100 in the present embodiment, the open / close detection unit 101 detects that the door 200 is opened (S1107 Y), and associates the door opening time with the detection that the door 200 is opened. After recording the information in the log stored in the storage unit 104 (S1108), if the opening / closing detection unit 101 does not detect that the door 200 is closed (N in S1109), only the grace notification notice time from the door opening time It is determined whether the time has passed (S1111). If the caution notice grace time has not elapsed from the door opening time (N in S1111), the process returns to the door closing detection waiting (S1109). If the caution notification postponement time has elapsed from the door opening time (S1111 Y), the caution notification is started (S1112), and information that associates the caution notification start time with the start of the caution notification is stored in the storage unit 104. (S1113).

  After that, the door closing detection waits again (S1114), and when the open / close detection unit 101 detects that the door 200 is closed (S1114 Y), it detects that the door is closed and the door 200 is closed. Is recorded in a log stored in the storage unit 104 (S1110), and the locking / unlocking unit 102 locks the lock 201 of the door 200 based on an instruction from the opening / closing detection unit 101 (S1125). The subsequent steps are the same as those in FIG.

  If the opening / closing detection unit 101 does not detect that the door 200 has been closed even after the warning notification is started (S1114 N), it is determined whether or not a warning notification grace period has elapsed from the door opening time (S1115). If the warning notification grace time has not elapsed from the door opening time (N in S1115), the process returns to the door closing detection waiting (S1114). If the warning notification postponement time has elapsed from the door opening time (Y in S1115), the warning notification is terminated (S1116), and information that associates the warning notification end time with the completion of the warning notification is stored in the storage unit 104. Is recorded in the log stored in (S1117). Furthermore, warning notification is started (S1118), and information in which the warning notification start time is associated with the start of warning notification is recorded in the log stored in the storage unit 104 (S1119).

  After that, the door closing detection waits again (S1120), and when the open / close detection unit 101 detects that the door 200 is closed (S1120 Y), it detects that the door is closed and the door 200 is closed. Is recorded in a log stored in the storage unit 104 (S1110), and the locking / unlocking unit 102 locks the lock 201 of the door 200 based on an instruction from the opening / closing detection unit 101 (S1125). The subsequent steps are the same as those in FIG.

  Even after the warning notification is started, if the opening / closing detection unit 101 does not detect that the door 200 is closed (S1120 N), it is determined whether or not the maximum notification time has elapsed from the warning notification start time (S1121). If the maximum notification time has not elapsed since the warning notification start time (N in S1121), the process returns to the door closing detection wait (S1120). If the maximum notification time has elapsed from the warning notification start time (S1121 Y), the warning notification is terminated (S1122), and information that associates the warning notification end time with the warning notification is stored in the storage unit 104. Is recorded in the log stored in (S1123).

  Finally, it waits for the opening / closing detection unit 101 to detect that the door 200 is closed (S1124 N), and when it detects that the door 200 is closed (S1124 N), the door closing time and the door 200 are closed. The information associated with the fact that it has been detected is recorded in the log stored in the storage unit 104 (S1110), and based on the instruction from the open / close detection unit 101, the locking / unlocking unit 102 locks the lock 201 of the door 200. Is locked (S1125). The subsequent steps are the same as those in FIG.

In the control device 100 according to the present embodiment, not only the first locking grace time, but also the attention notification grace time, the warning notification grace time, and the maximum warning notification time are used for control related to notification. (S1101 N), based on the log stored in the storage unit 104 so far, the update of the first locking grace time, the update of the warning notification grace time, the update of the warning notification grace time, the update of the maximum warning notification time I do. The warning notification grace time and the warning notification grace time are updated in the same notification grace time update operation described below. The update operation of the maximum notification time will be described later.
<Update operation of notification grace time>
The update operation of the notification postponement time will be described using the flowchart of FIG.

First, the elements of the door opening time array T2 (i) for storing the door opening times classified by time range are initialized to 0 (S1201).
A set of the door opening time t2 and the door closing time t3 is read from the log, and the door opening time (t3-t2) is calculated for each set (S1202).
With the time resolution as Δt, the array element T2 (k) is incremented for k where the door opening time (t3−t2) is equal to or greater than kΔt and less than (k + 1) Δt (S1203). By performing this operation for all door opening time and door closing time pairs read from the log, an array T2 (i) in which the door opening times are classified by the width of the time interval Δt is calculated. For example, if the time resolution Δt is set to 1 second, the update value of the notification grace time can be determined with an accuracy of 1 second.

The sum of all the elements of the calculated array T2 (i) is taken as N (S1204).
The maximum n is calculated such that the ratio of the sum of elements i> = n in the array T2 (i) to N is equal to or greater than a threshold (S1205). Here, for example, the threshold value is 30% for the caution notice delay time and 10% for the warning notice grace time.
Using n determined as described above, the notification grace time is set to nΔt (S1206).
<Updating operation of maximum notification time>
The maximum notification time update operation will be described with reference to the flowchart of FIG.

First, a set of the door opening time t2 and the door closing time t3 is read from the log, and the door opening time (t3-t2) is calculated for each set (S1301).
The difference ΔT between the maximum value of the door opening time (t3-t2) and the notification grace time is calculated (S1302).
The maximum notification time is set to α times ΔT (S1303). Here, α is a real number of 1 or more, for example, 1.2.
《Supplement》
The above-described embodiment may be modified as follows.

(1) In the above-described embodiment, it has been described that the grace time is always updated during operation. However, the grace time update period is determined to be a fixed period, and after that period, the grace time is updated. You may make it stop. This is because, for example, if a period of one week is determined and the grace time is determined from the logs accumulated during that period, it is expected that a sufficient value can be obtained.
Further, the grace time may be calculated based on the latest number of days or logs, not all logs. In this way, old logs that are not necessary for the update of the grace time can be deleted.

(2) In the above embodiment, the control device has been described as having only one set value for each type of grace time. You may make it use properly by.
(3) In the above-described embodiment, it has been described that the lock determines the locking / unlocking state based on whether the locking / unlocking unit has performed the locking or unlocking instruction, but the detection / unlocking state of the lock is provided. The locking / unlocking state may be determined based on the detection result.

(4) In the above-described embodiment, the authentication device is described as being a card reader and reading the authentication card. However, biometric authentication such as fingerprint authentication may be used.
(5) In the above-described embodiment, it has been described that the grace period is updated in the idle time when the authentication is not performed. However, the update may be performed every time the authentication is performed. In this case, the array used for calculation of the update value of the grace time is zeroed, and the array is stored in the storage unit without rereading the log. By updating the element, the load of rereading the log may be reduced.

(6) In the above-described embodiment, it is described that one set of doors and authentication devices is connected to one control device. However, a plurality of sets of doors and authentication devices are connected to one control device. May be.
In this case, the grace time may be held in the storage unit for each door, and each grace time may be updated based on a log recorded for each door. In this way, even if there is only one control device, it is possible to perform control using the optimum value of the grace time that differs for each door.

  Or you may make it use the same grace time collectively for several doors. By doing so, when a plurality of doors are installed at the entrance of a building or factory, it is possible to perform control using the same optimum grace time for any door.

100: Control device
101: Open / close detector
102: Locking / unlocking part
103: Authentication section
104: Storage unit
105: Update section
106: Execution unit
200: Door
201: Tablet
300: Authentication device
301: Reading unit
302: Notification section

Claims (6)

A control device for controlling a door,
An open / close detector for detecting the opening / closing of the door;
Log that records the event type and the occurrence time of the event in association with each other, and the time from the occurrence time of the first type event to the scheduled occurrence time at which the second type event should occur A storage unit for storing the grace time;
Even if the grace period elapses after the occurrence of the first type event, if the second type event does not occur, an execution unit that executes a predetermined process related to door control,
From the log, a plurality of combinations of the occurrence time of the second type event and the most recent first type event occurrence time before the occurrence time of the second type event are extracted, and each extracted set An update unit that calculates a time from an occurrence time of the first type event to an occurrence time of the second type event and updates the grace time to an update value determined based on the calculated time And
The log includes a door opening time that is an occurrence time of an event indicating that the opening / closing detection unit has detected that the door has been opened,
One of the first type event and the second type event is an event indicating that the opening / closing detection unit has detected that a door has been opened. The control device further includes:
It has a locking / unlocking part that locks / unlocks the door,
The log includes an unlocking time which is an occurrence time of an event indicating that the locking / unlocking unit unlocks the door lock,
The grace period is the first grace period indicating the time from the unlocking time to the scheduled locking time when the door should be locked if the door continues to close even when the door is unlocked. ,
The first type of event is an event indicating that the locking / unlocking part has unlocked the door,
The second type event is an event indicating that the opening / closing detection unit has detected that a door has been opened,
The predetermined process is a process of locking the door lock by the locking / unlocking part,
The updated value of the first locking grace time updated by the updating unit is,
2. The ratio of the number of groups in which the time from the unlocking time to the door opening time is equal to or less than the updated value with respect to the total number of the groups is a value that is equal to or greater than a predetermined ratio. The control device described. The control device further includes:
A locking / unlocking part for locking and unlocking the door;
And an authentication unit that performs entry / exit authentication,
In the log, an unlocking time that is an occurrence time of an event indicating that the locking and unlocking unit unlocks the door lock, and
Including an authentication time that is an occurrence time of an event indicating that the authentication unit has authenticated,
The grace time is a second locking grace time indicating the time from the authentication time to the scheduled locking time to lock the door when authentication is successful when the door is opened,
The first type of event is an event indicating that the authentication unit has succeeded in authentication,
The second type event is an event indicating that the opening / closing detection unit has detected that a door has been opened,
The predetermined process is a process of postponing the scheduled locking time between the authentication time and the second locking grace time until the time when the second locking grace time has elapsed from the authentication time,
The updated value of the second locking grace time updated by the updating unit is,
The ratio of the number of groups whose time from the authentication time to the door opening time is equal to or less than the updated value with respect to the total number of the groups is a value that is equal to or greater than a predetermined ratio. Control device. The predetermined process is a process of instructing a warning notification start for the door being kept open,
The log includes a door closing time that is an occurrence time of an event indicating that the opening / closing detection unit detects that the door is closed,
The grace time is a caution notice grace time indicating a time from a door opening time to a caution notice start scheduled time to be instructed to start caution notice when the door is kept open,
The first type event is an event indicating that the opening / closing detection unit has detected that a door has been opened,
The second type of event is an event indicating that the opening / closing detection unit has detected that a door is closed,
The update value of the warning notice grace time updated by the update unit is:
2. The ratio of the number of groups in which the time from the door opening time to the door closing time is equal to or greater than the updated value with respect to the total number of the groups is a value that is equal to or less than a predetermined ratio. Control device. The log includes a notice notification start time that is an occurrence time of an event indicating that the execution unit has instructed a notice notification start,
The execution unit further includes:
When the caution notification time has elapsed from the caution notification start time, a process for instructing the end of the caution notification and a process for instructing the warning notification start are executed
The warning notification time includes a warning notification delay time indicating a time from a door opening time to a warning notification start scheduled time to be instructed to start warning notification when the door is kept open, and the warning notification delay time. Is the difference between
The warning notice grace time is
Updated by the updating unit,
The update value of the alarm notification grace time updated by the update unit is:
The ratio of the number of groups whose time from the door opening time to the door closing time is not less than the updated value is less than or equal to the value smaller than the predetermined ratio with respect to the total number of the groups. 5. The control device according to claim 4. The execution unit is
6. The control device according to claim 5, wherein when a time equal to or greater than a maximum value of a time from the door opening time to the door closing time has elapsed in the log from the door opening time, an alarm notification end is instructed. .

Images