JP3757791B2 - Signal transmission device and security system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present inventionVarious sensors based on signals from various sensors installed in a specific areaWhen a change in the status ofRegarding the change of the stateA signal transmission device that transmits a notification signal and a plurality of the signal transmission devicesSecurity systemAbout.
[0002]
[Prior art]
FIG. 11 shows an example of a system for centrally managing the air conditioning and the like of each room while monitoring a person who tries to enter each room in the building from the outside. In FIG. 11, an electric lock 3 is attached to a door 2 in front of a room 1, and the electric lock 3 is driven by a card reader 4 for entering a room arranged beside the door 2. Yes. A numeric keypad reader 5 is disposed beside the card reader 4, and a display 6 comprising an LCD panel or the like is disposed above the card reader 4. An emergency lamp 7 that is turned on in an emergency is attached to the upper right of the front of the room 1.
[0003]
A space sensor 9, a temperature sensor 10, and a humidity sensor 11 for detecting infrared rays emitted by a human body are attached to the ceiling of the room 1. A security camera 12 is attached to the upper right corner of the room 1. Signals output from the sensors 9 to 11 and the camera 12 are given to input contacts of the input contact device 13, respectively.
[0004]
An air conditioner (air conditioner) 14 is attached to the right side wall surface of the room 1, and the air conditioner 14 is supplied with a control signal from an output terminal of the output contact device 15 together with the emergency lamp 7. .
[0005]
FIG. 12 shows a block configuration of the entire system. The card reader 4, numeric keypad reader 5, display 6, input contact device 13 and output contact device 15 all have a LAN communication function inside, and if necessary via a router 16, for example, in a building Communication is performed with a monitoring or management host 17 installed in a management room or the like.
[0006]
In addition, the operation of the card reader 4 and the numeric keypad 5 unlocks and locks the electric lock 3 and sets and releases the monitoring state (security system) by the host 17. When the monitoring state of the room 1 is set, a person who intends to enter the room normally inserts the ID card held by the card reader 4 into the card reader 4 and reads the ID information. By inputting the number, the monitoring state by the host 17 is released, and the electric lock 3 is unlocked.
[0007]
In the daytime and the like, a large number of people enter and leave the room 1 to perform a predetermined task. During this period, each time the sensor signal output from the temperature sensor 10 or the humidity sensor 11 changes, the sensor information is transmitted as a data packet. To the host 17 via the input contact device 13. Based on the transmitted sensor signal, the host 17 transmits a control signal to the air conditioner 14 via the output contact device 15 to control the air conditioning in the room 1.
[0008]
Also, the person who finishes the work and tries to leave the room 1 lastly inserts the ID card into the card reader 4 to set the monitoring state by the host 17 and locks the electric lock 3. When the monitoring state is set, the input contact device 13 is a signal for notifying the change every time the output signal of any one of the space sensor 9, the temperature sensor 10, the humidity sensor 11 and the security camera 12 changes. (Data packet) is transmitted to the host 17. For the security camera 12, when a change occurs in the image data being captured, the still image data at that time is transmitted to the host 17.
[0009]
[Problems to be solved by the invention]
During times such as noon, the door 2 is opened and closed because many people enter and leave the room 1, and the window 8 may be left open for ventilation. Alternatively, the presence or absence of a human body detected by the space sensor 9 changes relatively frequently.
[0010]
FIG. 13 shows an example of output changes of sensor signals from the space sensor 9 and the temperature sensor 10. In the case of the space sensor 9, the rising and falling of the signal correspond to detection and non-detection of infrared rays, and the period in which the signal is high corresponds to the state in which infrared rays are continuously detected. In the case of the temperature sensor 10, the rise and fall of the signal corresponds to the start of the rise or fall of the temperature, and the rise or fall of the temperature is continuously detected during the period when the signal is at the high level. Correspond. Accordingly, when a signal is transmitted to the host 17 every time the temperature or humidity in the room 1 changes or whenever infrared rays of the human body are detected, the signal output frequency from the input contact device 13 is considerably high. Become. If other rooms in the building have the same monitoring and management system, the total number of signal transmissions to the host 17 is considerable.
[0011]
In addition, the input contact device 13 tries to transmit again when it is determined that its transmission has failed. For this reason, as described above, when the response from the host 17 side (transmission of confirmation packet) is delayed in a heavy network load state, the input contact device 13 retransmits even though the transmission is actually successful. Processing may be performed. Further, the host 17 also transmits a signal to the output contact device 15. As a result, effective communication is hardly performed, and the network may fall into a so-called congestion state.
[0012]
In addition, the system (for example, sensors 9-11 etc. function) which monitors the change of the signals by the sensors 9-11 and the security camera 12 on the host 17 side in the state where security is released without controlling the air conditioner 14. The above-mentioned problem also occurs in the case of a system that checks whether or not a picture is displayed, or a system that monitors pictures displayed in a museum for theft prevention.
[0013]
In order to avoid such a problem, for example, the host 17 side may grant transmission permission to each input contact device 13 every predetermined time, and cause the input contact device 13 that has received the transmission permission to sequentially perform transmission. Conceivable. However, in this case, control for performing communication management on the host 17 side becomes complicated.
[0014]
In addition, at the transmission permission timing designated by the host 17, it is possible that no change in state has occurred in the target input contact device 13, and conversely, a change in state has occurred in other input contact devices 13. . Therefore, there is a concern that the communication redundancy may become too large, and there is a risk that the change in the state to be observed may be missed.
[0015]
  The present invention has been made in view of the above problems, and an object of the present invention is to provide a signal transmission device capable of efficiently reducing communication traffic with a host device and a plurality of the signal transmission devices.Security systemIs to provide.
[0016]
[Means for Solving the Problems]
  According to the signal transmission device of claim 1, the transmission control means includes:While the timer is not counting,Detect state changesThenFor host deviceRegarding the change of the stateSend notification signalAnd detected during the timer timing.The change in state is stored in the storage means. And when notification interval time passed, it was memorize | stored in the memory | storage meansNotification signal for change in stateIs sent to the host device.
[0017]
  That is, since the notification signal is transmitted to the host device at most every notification interval time, the transmission frequency can be greatly reduced. Therefore,Various sensorsEven in a communication network having a large number and in addition, a large number of signal transmission devices, the traffic can be prevented from significantly increasing. And since the information regarding the new state change detected during the elapse of the notification interval time can be sent to the upper device in a lump after the elapse of the time, the upper device sideVarious sensorsEven when the state change is monitored, a decrease in the monitoring level can be suppressed as much as possible.
[0018]
  According to the signal transmission device of claim 2, the transmission control means includes:While the timer is countingThe detection time of the detected change in the state is stored in the storage means, and the detection time is also transmitted to the host device.Various sensorsIt is possible to accurately grasp at what time the state change has actually occurred.
[0019]
  According to the signal transmission device of claim 3,3. A security system comprising a plurality of signal transmission devices according to claim 1 or 2, wherein the transmission control means is a timer when a release state permitting entry into the area is set in the host device. Provided is a security system that performs a process based on the time keeping and transmits a notification signal related to the state change when a change in the state is detected when a set state that does not permit entry into the area is set in a host device. be able to.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
A first embodiment in which the present invention is applied to a security system and an air conditioner control system will be described below with reference to FIGS. The same parts as those in FIGS. 11 and 12 are denoted by the same reference numerals, description thereof is omitted, and different parts will be described below.
[0026]
In the network system 20 in this embodiment, as shown in FIG. 4, the input contact device 13 shown in FIG. 12 is replaced with an input contact device 21.
[0027]
FIG. 3 shows the internal configuration of the input contact device 21. Output signals of the space sensor 9, the temperature sensor 10, the humidity sensor 11, and the security camera 12 are given to the input contacts 21 a to 21 d of the input contact device 21, and these output signals are supplied to the control unit (transmission control means) 22. Is input to the input port. Further, the control unit 22 communicates with the host (higher-order device) 17 via the communication unit 23. In this embodiment, the security camera 12 is handled as a kind of sensor (image sensor).
[0028]
FIG. 1 shows a control process of the control unit 22, and FIG. 2 shows an example of a transmission pattern of detection information based on the control process.
[0029]
The control unit 22 is in a standby state until the output signal level of any of the sensors 9 to 12 changes (step S1). If any output signal level changes (see (1) in FIG. 2), the determination in step S1 is YES, and the detection information is transmitted to the host 17 as a notification signal (step S2). Here, the detection information includes the type of sensor in which the output signal level has changed, information relating to a change in state consisting of the change level of the signal, and the detection time at which the change was detected.
[0030]
Subsequently, it is determined whether or not a security system is set for the room 1 (step S3). If it is set, the determination in step S3 is YES and the process returns to step S1. Therefore, when the security system is set, detection information is transmitted to the host 17 every time the output signal level of any of the sensors 9 to 12 changes. As a result, the level of monitoring by the host 17 can be increased, and theft and the like can be prevented beforehand.
[0031]
The security system is set / released from the host 17 to the input contact device 21 when the last exit person of the room 1 sets the system or when the person who first tries to enter the room 1 releases the system. Can be determined based on the information to be processed.
[0032]
If the security system is not set, the determination in step S3 is NO, and the timer 22a (the timer or software timer built in the control unit 22) is started to start timing (step S4). .
[0033]
Thereafter, it is determined whether any of the sensors 9 to 12 has a sensor signal change (step S5). If there is no sensor signal change, it is determined whether the notification interval time T1 has elapsed ( Step S6). If the sensor signal changes for any of the sensors 9 to 12 before the notification interval time T1 elapses, the determination in step S5 becomes YES, and the output information of the sensor is stored in the internal memory (storage means) 22b. Store (step S7). The notification interval time T1 is set to, for example, about 1 minute to several minutes.
[0034]
Therefore, if the sensor signal changes as shown in time points (2) to (6) in FIG. 2 while the processes of steps S5 to S6 are repeated, the host 17 is immediately notified of the change. In step S7, the output information is stored in the memory 22b.
[0035]
Thereafter, when the notification interval time T1 has elapsed and the determination in step S6 is YES, it is determined whether there is output information of the sensor stored in the memory 22b (step S8). If there is output information, the determination in step S8 is YES, and detection information based on the information stored in the memory 22b is transmitted to the host 17 (see step S9, FIG. 2 (7)). That is, the sensor output information generated at the time points (2) to (6) in FIG. 2 is collectively transmitted to the host 17 as detection information. Then, the process returns to step S4, and the time measurement by the timer 22a is started again.
[0036]
After the transition from step S9 to step S4, if the notification interval time T1 has passed without any change in the output state of the sensor as shown at time points (7) to (8) in FIG. 2, the determination is made in step S8. Becomes NO, and the process proceeds to step S1. Accordingly, in this case, detection information is not transmitted to the host 17 (see (8) in FIG. 2).
[0037]
Thereafter, when a change in the output state of the sensor occurs at time {circle around (9)} in FIG. 2, the determination in step S1 is again YES, information is transmitted to the host 17 in step S2, and the above-described processing is performed. If the security system is set while the timer 22a is counting, the sensor output information stored in the memory is immediately transmitted to return to the start.
[0038]
As described above, according to this embodiment, the output signals of the sensors 9 to 12 are given to the input contacts 21a to 21d of the input contact device 21 used as the terminal device of the security system or the centralized management system of the air conditioner 14, and the control is performed. When the unit 22 detects a change in the state of the sensors 9 to 12 for any of the input contacts 21 a to 21 d, the unit 22 transmits detection information to the host 17 once. When a new state change is detected for any of the sensors 9 to 12 from the time point until the notification interval time T1 elapses, the state change is stored in the memory 22b, and when the notification interval time T1 elapses, The information stored in the memory 22b is transmitted to the host 17.
[0039]
As a result, signal transmission to the host 17 is performed at most every notification interval time T1, and the transmission frequency can be greatly reduced. Therefore, even in the network system 20 having a large number of input contacts and a large number of input contact devices 21 as in the terminal device of the security system, it is possible to avoid the traffic from rising significantly and falling into a congestion state. it can. And since the information regarding the new state change detected during the elapse of the notification interval time T1 is collectively transmitted to the host 17 after the elapse of the notification interval time T1, the lowering of the monitoring level in the host 17 is suppressed as much as possible. Can do.
[0040]
Moreover, since the control part 22 memorize | stores the detection time of the state change of the sensors 9-12 detected during notification interval time T1 in the memory 22b, and also transmits the detection time to the host 17, The host 17 can accurately grasp at which time the state change that occurred during the notification interval time T1 actually occurred.
[0041]
Furthermore, according to this embodiment, the control part 22 is performing the process accompanying the setting of notification interval time T1 only in the specific time slot | zone when the security system is cancelled | released. Therefore, in daytime when many people are working in the room 1, the signal change frequency of the sensors 9 to 12 is high, and the necessity for strict monitoring by the host 17 is low. It can be set to reduce the number of signal transmissions. On the other hand, at night or the like when the security system is set, the host 17 can reliably capture details of signal changes of the sensors 9 to 12 in order to prevent theft and the like by increasing the monitoring level.
(Second Embodiment)
FIG. 5 shows a control process of the control unit 22 in the second embodiment of the present invention, and FIG. 6 shows an example of a transmission pattern of detection information based on the control process. In addition, the same code | symbol is attached | subjected to the same part as 1st Embodiment, description is abbreviate | omitted, and a different part is demonstrated below.
[0042]
In the second embodiment, the control unit 22 is in a standby state until the output signal level of any of the sensors 9 to 12 changes (step S1). If any of the output signal levels changes, the determination in step S1 is YES, and the timer 22a is started to start timing (step S4).
[0043]
Thereafter, it is determined whether or not the output signal level has changed for another sensor different from the sensor that detected the signal change in step S1 (step S10), and the output signal level has not changed for the other sensor. Determines whether the detection interval time T2 has elapsed (step S11). Here, the detection interval time T2 is set to about several seconds to several tens of seconds, for example.
[0044]
Then, when the detection interval time T2 elapses without changing the output signal level for the other sensors, the determination in step S11 becomes YES and the process returns to step S1. In this case, the output state change of the sensor that has detected the signal change in step S <b> 1 is not transmitted to the host 17.
[0045]
If the output signal level changes for other sensors before the detection interval time T2 elapses, the determination in step S10 is YES, and the detection information of the sensor that detected the signal change in steps S1 and S10 is hosted. 17 (step S12), and the process returns to step S4.
[0046]
For example, even if the output state of the sensor A changes at the time point (1) in FIG. 6 by the above-described control process, the detection interval time T2 has passed without any change in the output signal level for other sensors. The change in the output state of sensor A at time (1) is not transmitted to the host 17. This is because when the state change occurs only in the sensor A, the change is assumed to be temporary or local, so the necessity of notifying the host 17 is considered to be relatively low. is there.
[0047]
Further, for example, when the output state of the sensor B changes at the time point (3) in FIG. 6 and the change in the output state of the sensor A is detected at the time point (4) before the detection interval time T2 elapses, the control unit 22 The detection information of the sensors A and B is transmitted to the host 17. This is also the case for the other sensors A (for example, the temperature sensor 10) within the detection interval time T2 that can be regarded as substantially the same period after the occurrence of the state change in the sensor B (for example, the space sensor 9). This is because it is assumed that the state change is surely occurring on a certain scale.
[0048]
Therefore, according to the second embodiment, the control unit 22 is assumed that two or more state changes relating to the sensors 9 to 12 occur at the same time, and the state change in the room 1 is reliably generated on a certain scale. In this case, since the detection information is transmitted to the host 17, the signal transmission frequency can be efficiently reduced.
(Third embodiment)
FIGS. 7 and 8 show the control processing of the control unit 22 in the third embodiment of the present invention, and FIGS. 9 and 10 show examples of detection information transmission patterns based on the control processing. The control process of the control unit 22 in the third embodiment is a combination of the second embodiment and the first embodiment.
[0049]
In this embodiment, the timer that measures the notification interval time T1 described in the first embodiment will be described as a notification interval timer, and the timer that measures the detection interval time T2 described in the second embodiment will be described as a detection interval timer. As these timers, a timer built in the control unit 22 or a software timer is used.
[0050]
In the following, this embodiment will be described with the same reference numerals assigned to the same parts as those in the first and second embodiments, and different parts from the first and second embodiments.
[0051]
When the control unit 22 starts the process, it first stands by until the output signal level of any of the sensors 9 to 12 changes (step S1). If any of the output signal levels changes, the determination in step S1 is YES, and the detection interval timer is started to start timing (step S4).
[0052]
Thereafter, it is determined whether or not the output signal level has changed for another sensor different from the sensor that has detected the signal change in step S1 (step S10), and the output signal level has not changed for the other sensor. Determines whether the detection interval time T2 has elapsed (step S11).
[0053]
Then, when the detection interval time T2 elapses without changing the output signal level for the other sensors, the determination in step S11 becomes YES and the process returns to step S1. In this case, the output state change of the sensor that has detected the signal change in step S <b> 1 is not transmitted to the host 17.
[0054]
Therefore, for example, as shown in FIG. 9A, even if the output state of the sensor A changes at the time point (1), the detection interval time T2 elapses without any change in the output signal level for the other sensors thereafter. In this case, the output state change of the sensor A at the time point (1) is not transmitted to the host 17.
[0055]
If the output signal level changes for other sensors before the detection interval time T2 elapses, the determination in step S10 is YES, and the detection information of the sensor that detected the signal change in steps S1 and S10 is hosted. 17 (step S12). Thereafter, the detection interval timer is stopped (step S13), and subsequently, similarly to the first embodiment, it is determined whether or not the security system is set (step S14). If it is set, the determination of step S14 is performed. Becomes YES and returns to step S1.
[0056]
Accordingly, when the security system is set, detection information is transmitted to the host 17 every time two or more state changes relating to the sensors 9 to 12 occur simultaneously, as in the second embodiment.
[0057]
If the security system is not set, the determination in step S14 is NO, and the process proceeds to step S15 in FIG. 8 to start the notification interval timer.
[0058]
Thereafter, it is determined whether or not there is a change in the sensor signal for any of the sensors 9 to 12 (step S16), and if there is no change in the sensor signal, it is determined whether or not the notification interval time T1 has passed ( Step S17). When the notification interval time T1 elapses without any sensor signal of the sensors 9 to 12 changing, the determination in step S17 becomes YES and the process returns to step S1 in FIG.
[0059]
Therefore, for example, as shown in FIG. 9B, the output state of the sensor A changes at the time point (1), and the change in the output state of the sensor B is detected at the time point (2) before the detection interval time T2 elapses. Then, the control unit 22 transmits the detection information of the sensors A and B to the host 17, but when the notification interval time T1 elapses without any change in the sensor signals of the sensors 9 to 12 from that time point. Returning to step S1, the processing from step S1 is performed again.
[0060]
If any of the sensor signals of the sensors 9 to 12 changes before the notification interval time T1 elapses, the determination in step S16 becomes YES and the detection interval timer is started (step S18).
[0061]
Thereafter, it is determined whether or not the output signal level has changed for another sensor different from the sensor that detected the signal change in step S16 (step S19), and the output signal level has not changed for the other sensor. Determines whether the detection interval time T2 has elapsed (step S20).
[0062]
When the detection interval time T2 elapses for the other sensors without changing the output signal level, the determination in step S20 is YES, and it is then determined whether the notification interval time T1 has elapsed (step 21). . When the notification interval time T1 has not elapsed, the process returns to step S16. Then, when the notification interval time T1 elapses without two or more state changes relating to the sensors 9 to 12 occurring simultaneously within the detection interval time T2, the process returns to step S1.
[0063]
Therefore, for example, as shown in FIG. 10A, the output state of sensor A changes at time point (1), and the change in output state of sensor B is detected at time point (2) before the detection interval time T2 elapses. Then, the control unit 22 transmits the detection information of the sensors A and B to the host 17. After this transmission, even if the output state of the sensor A changes at the time point (3), before the detection interval time T2 elapses. In the case where the output signal level does not change for other sensors, when the notification interval time T1 elapses, the output state change of the sensor A at the time point (3) is not transmitted to the host 17, and the processing from step S1 is performed again. It will be.
[0064]
If it is determined in step S19 that the output signal level of another sensor has changed, the detection information of the sensor that has detected the signal change in step S16 and step S19 is stored in the memory 22b as in the first embodiment. (Step S19). Thereafter, the detection interval timer is stopped (step S23), and it is determined whether the notification interval time T1 has elapsed (step S24). When the notification interval time T1 elapses, the detection information stored in the memory 22b is transmitted to the host 17 (step S25), and the process returns to step S15.
[0065]
Therefore, for example, as shown in FIG. 10B, the output state of the sensor A changes at the time point (1), and the change in the output state of the sensor B is detected at the time point (2) before the detection interval time T2 elapses. Then, the control unit 22 transmits the detection information of the sensors A and B to the host 17, and after this transmission, the output state of the sensor A changes at the time point (3), and the output state change of the sensor B at the time point (4). Is detected, the detection information of the sensors A and B at the time points (3) and (4) is stored in the memory 22b, and transmitted to the host 17 at the time point (5) when the notification interval time T1 has elapsed.
[0066]
Therefore, according to the third embodiment, the control unit 22 is assumed that two or more state changes related to the sensors 9 to 12 occur at the same time, and the state change in the room 1 is surely generated on a certain scale. In this case, the same effect as that of the second embodiment in which the detection information is transmitted to the host 17 is obtained, and after the detection information is transmitted to the host 17 once, the notification interval time T1 is from that point. When a new state change to be transmitted to the host 17 is detected before the time elapses, the state change is stored in the memory 22b, and when the notification interval time T1 elapses, the information stored in the memory 22b is transmitted to the host 17. The same effect as the first embodiment is achieved.
[0067]
The present invention is not limited to the first to third embodiments described above, and the following modifications or expansions are possible.
[0068]
In the first embodiment, step S3 may be deleted and the transmission interval time T1 may always be set.
[0069]
In the second and third embodiments, detection information may be transmitted to the host 17 when a state change occurs in three or more of the sensors 9 to 12 within the detection interval time T2.
[0070]
You may apply only about any one of a security system and the centralized management system of the air-conditioner 14. FIG.
[0071]
In addition to these systems, for example, a high-level or low-level binary signal that accompanies opening / closing of a relay contact is given to an input contact of a signal transmission device, and a control state of a mechanical device or the like is transmitted to a host device. Central control may be used.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a control process of a control unit in a first embodiment in which the present invention is applied to a security system and an air conditioner control system.
FIG. 2 is a timing chart showing an example of a transmission pattern of detection information based on the control process of FIG.
FIG. 3 is a functional block diagram showing an internal configuration of the input contact device according to the first embodiment of the present invention.
FIG. 4 is a diagram showing an overall configuration of a system in the first embodiment of the present invention.
FIG. 5 is a flowchart showing a control process of a control unit in the second embodiment of the present invention.
6 is a timing chart showing an example of a transmission pattern of detection information based on the control process of FIG.
FIG. 7 is a flowchart showing a control process of a control unit in the third embodiment of the present invention.
FIG. 8 is a flowchart showing a control process following FIG.
FIG. 9 is a timing chart showing an example of a transmission pattern of detection information based on the control process of FIGS. 7 and 8;
10 is a timing chart showing an example of a transmission pattern of detection information based on the control processes of FIGS. 7 and 8. FIG.
FIG. 11 is a perspective view illustrating the inside of a room that is a part of a central management system for security and air conditioning.
FIG. 12 is a diagram showing an overall configuration of a conventional system.
FIG. 13 is a diagram illustrating an example of a change in output of a sensor signal.
[Explanation of symbols]
9 ... space sensor, 10 ... temperature sensor, 11 ... humidity sensor, 12 ... security camera,
17 ... Host (host device), 20 ... Network system,
21 ... Input contact device (signal transmission device, terminal device),
21a to 21d ... input contacts, 22 ... control unit (transmission control means),
22b: Memory (storage means).

Claims (3)

When detecting a change in the state of the various sensors based on signals from various sensors installed in a specific area, in a signal transmission device that transmits a notification signal regarding the change in the state to a host device,
A timer for measuring a predetermined notification interval time when transmitting the notification signal;
When the change in the state is detected while the timer is not counting, the notification signal relating to the change in the state is transmitted, the change in the state detected during the timing of the timer is stored in the storage means, and the stored state signal transmitting apparatus according to claim the notification signal relating to the change that and a transmission control means for transmitting to the host device after the lapse of the notification time interval of. The transmission control means stores in the storage means the detection time of the state change detected during the time counting of the timer, and also transmits the detection time to the host device after the elapse of the notification interval time. The signal transmission device according to claim 1. A security system comprising a plurality of signal transmission devices according to claim 1 or claim 2,
The transmission control means performs processing based on the timing of the timer when the release state permitting entry into the area is set in the upper device, and permits entry into the region in the upper device. A security system that transmits a notification signal related to a state change when the state change is detected when a set state is set.

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