JP6805429B2 - Security system controller - Google Patents

Description

The present invention is a security system including a control device that controls the operation and stop of an abnormality detection unit that can detect an indoor abnormality, and a plurality of authentication terminals that perform wireless communication with the control device and instruct the operation and stop. With respect to the control device in.

For example, in a security system installed in a house such as a house to detect an illegal intruder indoors, a security mode is set to guard against an illegal intruder when the resident goes out, and when the resident returns home. Release the alert mode and switch to the normal mode. In a system in which the alert / normal mode is switched by a remote controller which is an authentication terminal, a plurality of remote controllers may be used when there are a plurality of residents living together in a house.

In such cases, there may be a remote control that is not carried when the resident goes out and is left indoors when he is away. Then, the alert mode may be canceled by operating the remote controller by a person who has invaded the room. Therefore, in a security system equipped with a plurality of remote controllers, a technique for preventing an intruder from operating the remote controller left indoors to cancel the alert mode has been desired. As an example of such a technique, there is, for example, Patent Document 1.

Japanese Unexamined Patent Publication No. 2016-200975

However, in the technique disclosed in Patent Document 1, the control device arranged indoors requires a vibration sensor or the like in order to determine whether the remote controller exists indoors or outdoors. Further, since the control device is always in an operating state in order to make the determination, power consumption becomes a problem when battery drive is desirable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a security system capable of determining whether or not to invalidate the function of an authentication terminal with less power consumption without using a special sensor or the like. The purpose is to provide a control device.

According to the control device of the security system according to claim 1, when the operation of the abnormality detection unit is instructed, the determination unit measures the reception intensity of the radio signal transmitted from each of the plurality of authentication terminals by the measurement unit. , Store in the storage unit. When a certain time elapses from that point, the reception strength of the radio wave signal is measured again, and the measured reception strength is compared with the reception strength of the corresponding authentication terminal stored in the storage unit. Then, a determination process is performed to invalidate the instruction from the authentication terminal for which there is no difference in reception strength between the two.

When the resident is instructed to operate the abnormality detection unit when going out and the security system is in the alert mode, if multiple authentication terminals are located near the control device, the control device will perform each authentication. The level of reception intensity will be measured according to the distance from the terminal. Normal residents are still indoors immediately after setting the security system to alert mode. Therefore, even for the authentication terminal that the resident intends to carry when going out, wireless communication is performed, and the reception strength is measured and stored.

After that, when a certain period of time has passed, the resident is in a state of going out, so if the reception strength of the radio signal is measured again at that time, the authentication terminal carried by the resident who went out The reception strength is not measured, and the difference from the reception strength stored in the storage unit becomes very large. On the other hand, since the position of the authentication terminal left behind by the resident who went out without carrying it near the control device has not changed, the difference between the re-measured reception strength and the reception strength stored in the storage unit is It should be virtually nonexistent.

Therefore, it is possible to determine whether or not the authentication terminal has been misplaced by using the communication function normally provided in the control device, and invalidate the instruction given when the terminal is used. Then, the control device needs to communicate between the time when the security system is set to the alert mode until a certain period of time elapses, and between the time when the reception intensity is remeasured and the alert mode is released. Since there is no such thing, power consumption can be reduced.

According to the control device of the security system according to claim 2, the determination unit validates the instruction from the authentication terminal whose reception strength of the radio signal could not be measured in the first measurement of the reception strength. As a result, it is possible to avoid invalidating the authentication terminal that does not exist in the vicinity of the control device from the beginning and whose reception strength could not be measured.

According to the control device of the security system according to claim 3, the authentication terminal transmits a radio wave signal at predetermined intervals, and the measuring unit sets the time for measuring the reception intensity to be equal to the predetermined intervals. As a result, even if the timing at which each authentication terminal transmits the radio wave signal is different, each radio wave signal can be reliably received while suppressing the power consumption of the control device.

According to the control device of the security system according to claim 4, the determination unit repeatedly executes the determination process if there is no difference in the reception strength of all the authentication terminals in the remeasurement. At that time, the interval for performing the next determination process is set longer than the interval until the previous determination process is performed. As a result, the power consumption of the control device can be reduced when the determination process is repeatedly executed.

According to the control device of the security system according to claim 5, if there is an authentication terminal having no difference in reception strength between the two in the remeasurement, the determination unit starts timing from that point and repeats the determination process. Execute. Then, when there is a difference in the reception intensity of the radio wave signal from the authentication terminal that has been invalidated once, the invalidation release time is set according to the time from the time when the invalidation is made to the time when the difference occurs. When the invalidation release time elapses, the instruction from the invalidated authentication terminal becomes valid.

When the determination process is repeatedly executed, the misplaced authentication terminal is carried by the resident who has returned home, which may cause a difference in the reception strength of the radio signal. For example, when a resident comes to pick up an authentication terminal that has been left behind and then goes out. Corresponding to such a situation, the invalidation release time is set as described above. In this way, in order to enable the operation by the authentication terminal that has been left for a long time, a longer time is required than that of the authentication terminal that has been left for a short time. Therefore, while restricting the intruder from operating the authentication terminal left in the house, the resident comes to pick up the authentication terminal left behind and goes out, and a long time elapses during the outing. Then, the operation of the authentication terminal by the resident can be enabled.

A functional block diagram according to the first embodiment and showing a configuration of a security system. Sequence diagram showing communication processing between the controller and multiple authentication terminals Diagram showing a state in which some of multiple authentication terminals are left behind in a residence The figure explaining the transmission / reception state between an authentication terminal and a controller The figure which is 2nd Embodiment and explains the transmission / reception state between an authentication terminal and a controller.

(First Embodiment)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a functional block diagram showing the configuration of the security system of the present embodiment. The security system 1 includes a controller 2 and a plurality of authentication terminals 3 (A, B, C). The security system 1 is a so-called home security system that detects an indoor abnormality in a house such as a house and takes measures such as notification. The security system 1 is not limited to a house such as a residence, but may be installed in a business establishment or a warehouse. The controller 2 corresponds to a control device and controls the operation and stop of the abnormality detection unit 4.

The abnormality detection unit 4 detects an illegal intrusion by an intruder into the room as an abnormality. The controller 2 switches between operation and stop of the abnormality detection unit 4 based on an instruction by wireless communication from the authentication terminal 3. In addition, the abnormality detection unit 4 includes a window opening / closing sensor that detects the opening / closing of a window, a window destruction sensor that detects window destruction due to vibration to the window, a fire sensor that detects a fire, and a gas leak sensor that detects a gas leak. Etc. may be included.

The controller 2 includes a control unit 11, an operation unit 12, and a communication unit 13. The control unit 11 is composed of, for example, a microcomputer, and includes various functional units such as a radio wave intensity measuring unit 14, a storage unit 15 which is a memory, and a misplacement determination unit 16. The controller 2 is driven by a battery when it is installed in a place where there is no power supply or where wiring of the power supply is difficult. The operation unit 12 is a switch or the like for the user to directly operate the controller 2 and input an instruction. The communication unit 13 is an interface for the control unit 11 to perform wireless communication with the authentication terminal 3, and in the present embodiment, for example, Bluetooth (registered trademark) is used as the communication protocol.

The radio wave strength measuring unit 14 is a functional unit that measures the strength of the radio wave signal received from the authentication terminal 3 when performing the above wireless communication. The storage unit 15 stores the strength of the received signal measured by the radio wave strength measuring unit 14. The misplaced determination unit 16 performs a determination process of the authentication terminal 3 misplaced indoors based on the strength of the received signal measured by the radio wave intensity measuring unit 14.

The wireless authentication terminal 3 includes a communication unit 17 and a control unit 18. The communication unit 17 is a communication interface similar to the communication unit 13. The control unit 18 is also composed of a microcomputer and performs various controls as a communication terminal. As shown in FIGS. 1 and 3, the authentication terminal 3 of the present embodiment includes a bracelet type terminal 3A and 3C and a smartphone type terminal 3B. The number of terminals 3 capable of communicating with the controller 2 is not limited to "3". Further, the form of the authentication terminal 3 is not limited to the bracelet type and the smartphone type.

Next, the operation of this embodiment will be described with reference to FIGS. 2 and 3. The authentication terminal 3 transmits advertisement packets used in Bluetooth communication, for example, at 1-second intervals. When the resident of the residence is at home, the controller 2 is "at home" in the initial state (S1), and the security system 1 is in the "normal mode". Then, when the "warning mode" is set by performing the "security operation" when the resident goes out, the controller 2 performs the authentication communication with the authentication terminal 3 at that time (S2). That is, it communicates with the authentication terminals 3 located around the controller 2 and identifies which of the terminals 3A to 3C they are.

When the "warning mode" is set, the resident of the residence shifts to "going out" (S3), but the controller 2 receives the radio signal reception strength of the radio signals of the terminals 3A to 3C when the above authentication communication is performed. (S4) and store them in the storage unit 15 (S5). It is assumed that the reception intensity here is a relative value, and is, for example, "8", "7", and "9", respectively.

Then, the controller 2 waits for a certain period of time, for example, about 10 minutes (S6). During this period, the resident has actually gone out and is absent, and as shown in FIG. 3, the authentication terminal 3C carried by the resident who has gone out does not exist around the controller 2. The authentication terminals 3A and 3B are left in the house without being carried.

Then, when a certain period of time elapses, the controller 2 communicates with the authentication terminal 3 for, for example, only 3 seconds, and measures the reception strength of the radio wave signal again (S7). Then, since the positions of the authentication terminals 3A and 3B left in the house have not changed since before going out, the reception intensity shows the same value as the value stored in the storage unit 15 in step S5. In these 3 seconds, the authentication terminals 3A and 3B transmit the advertisement packet to the controller 2 at least twice.

For example, as shown in FIG. 4, when the authentication terminal 3 transmits advertisement packets at T second intervals, the controller 2 is set to be able to receive advertisement packets only for T seconds, so that the advertisement packets from a plurality of authentication terminals 3 can be received. Can always be received once. As a result, when trying to receive advertisement packets transmitted from all terminals 3 at different times, the advertisement packets transmitted from each authentication terminal 3 are transmitted while minimizing the power consumed by the controller 2. You can definitely get it.

On the other hand, since communication is not substantially established with the authentication terminal 3C carried by the resident, the reception strength thereof is an extremely low value, for example, "0". Therefore, the misplacement determination unit 16 of the controller 2 determines that the authentication terminals 3A and 3B are terminals misplaced in the residence (S8). After that, even if the authentication terminals 3A and 3B try to communicate, the controller 2 invalidates the communication with them without connecting them. For example, when the authentication terminal 3 is outside the entrance, the reception strength is about "3", so that this case is also invalidated. Then, when the resident who went out returns home, if there is communication from the authentication terminal 3C that he carried with him, he will connect to it, and when he is instructed to cancel the "warning mode", he will cancel it. Switch to "normal mode".

If there is an authentication terminal 3 that the controller 2 grasps as a connection target at the time of step S4 and the reception strength is "0", the authentication terminal 3 is "valid" at that time. , And is excluded from the invalidation judgment processing. As a result, it is possible to avoid invalidating the authentication terminal 3 which does not exist in the vicinity of the controller 3 from the beginning and whose reception strength could not be measured.

As described above, according to the present embodiment, when the misplacement determination unit 16 of the controller 2 is instructed to operate the abnormality detection unit 4, the reception intensity of the radio wave signal transmitted from each of the authentication terminals 3A to 3C is radio wave. It is measured by the strength measuring unit 14 and stored in the storage unit 15. When a certain time elapses from that point, the reception strength of the radio wave signal is measured again, and the measured reception strength is compared with the reception strength of the corresponding authentication terminals 3A to 3C stored in the storage unit 15. Then, a determination process is performed to invalidate the instructions from the authentication terminals 3A and 3B for which there is no difference in reception strength between the two.

That is, it is determined whether or not the authentication terminal 3 is misplaced by using the communication function normally provided in the controller 2, and when it is determined that the authentication terminal 3 is misplaced, the authentication terminal 3 is used. The instructions given in case can be overridden. Then, the controller 2 communicates between the time when the security system 1 is set to the alert mode until a certain period of time elapses, and the period after the reception intensity is remeasured until the alert mode is released. Since there is no need, power consumption can be reduced. Therefore, when the controller 2 is battery-powered, the operating time can be extended.

Further, the misplacement determination unit 16 validates the instruction from the authentication terminal 3 whose reception strength is "0" in the first measurement of the reception strength. As a result, it is possible to avoid invalidating the authentication terminal 3 which does not exist in the vicinity of the controller 2 from the beginning and whose reception strength could not be measured.

Further, since the radio field intensity measuring unit 14 sets the time for measuring the reception intensity to be equal to the predetermined interval T for transmitting the advertisement packet by the authentication terminal 3, the timing at which each authentication terminal 3 transmits the packet is different. However, each packet can be reliably received while suppressing the power consumption of the controller 2.

(Second Embodiment)
Hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, description thereof will be omitted, and different parts will be described. As shown in FIG. 5, in the second embodiment, the misplacement determination unit 16 repeatedly executes the determination process if there is no difference in the reception intensities of all the authentication terminals 3 in the measurement again in step S7. At that time, the interval for performing the next determination process is set longer than the interval until the previous determination process is performed. For example, as shown in FIG. 5, it corresponds to the first fixed time. For the processing low interval, the next measurement is performed after the lapse of a long interval of "d", the next measurement is performed after the lapse of a long interval of "2d", and so on. As a result, the power consumption of the controller 2 can be reduced when the determination process is repeatedly executed.

The present invention is not limited to the embodiments described above or in the drawings, and the following modifications or extensions are possible.
The process may be executed as follows. If there is an authentication terminal 3 having no difference in reception strength between the two in the re-measurement, the misplaced determination unit 16 starts timing from that point and repeatedly executes the determination process as in the second embodiment. Then, when there is a difference in the reception intensity of the radio wave signal from the authentication terminal 3 that has been invalidated once, the invalidation release time is set according to the time from the time when the invalidation is made to the time when the difference occurs. When the invalidation release time elapses, the instruction from the invalidated authentication terminal 3 becomes valid.

When the determination process is repeatedly executed, the misplaced authentication terminal 3 is carried by the resident who has returned home, which may cause a difference in the reception strength of the radio wave signal. For example, when the resident comes to pick up the misplaced authentication terminal 3 and then goes out. Corresponding to such a situation, the invalidation release time is set as described above. In this way, in order to enable the operation by the authentication terminal 3 which has been left for a long time, a longer time than that of the authentication terminal 3 which has been left for a short time is required. Therefore, while restricting the intruder from operating the authentication terminal 3 left in the house, the resident comes to pick up the authentication terminal 3 left behind and goes out for a long time while going out. After that, the operation of the authentication terminal 3 by the resident can be enabled.

The interval at which the authentication terminal 3 transmits the advertisement packet is not limited to one second.
The fixed time is not limited to 10 minutes, and may be appropriately changed according to the individual design. Further, the communication time when re-measuring the reception strength is not limited to 3 seconds.
The communication protocol is not limited to Bluetooth.

In the drawing, 1 is a security system, 2 is an SRB, 3 is an authentication terminal, 4 is an abnormality detection unit, 14 is a radio field intensity measurement unit, 15 is a storage unit, and 16 is a misplacement determination unit.

Claims (5)

A control device that controls the operation and stop of the abnormality detection unit that can detect indoor abnormalities,
The control device of a security system including a plurality of authentication terminals that perform wireless communication with this control device and instruct the operation and stop.
A measuring unit that measures the reception strength of radio signals used for wireless communication,
A storage unit that stores the reception strength measured by this measuring unit,
When the operation of the abnormality detection unit is instructed, the reception strength of the radio wave signal transmitted from each of the plurality of authentication terminals is measured and stored in the storage unit.
When the reception strength of the radio wave signal is measured again after a certain period of time, the measured reception strength is compared with the reception strength of the corresponding authentication terminal stored in the storage unit, and there is no difference in the reception strength between the two for authentication. A control device for a security system including a judgment unit that performs a judgment process for invalidating an instruction from a terminal. The control device for a security system according to claim 1, wherein the determination unit validates an instruction from an authentication terminal whose reception strength of a radio signal could not be measured in the first measurement of reception strength. The authentication terminal transmits the radio wave signal at predetermined intervals, and the authentication terminal transmits the radio wave signal.
The control device for a security system according to claim 1 or 2, wherein the measuring unit sets the time for measuring the reception intensity equal to the predetermined interval. If there is no difference in the reception strength of all the authentication terminals in the re-measurement, the determination unit repeatedly executes the determination process, and sets the interval at which the next determination process is performed as the interval until the previous determination process is performed. The control device for a security system according to any one of claims 1 to 3, which is set longer than. In the re-measurement, if there is an authentication terminal having no difference in reception strength between the two, the determination unit starts counting from that point and repeatedly executes the determination process.
When there is a difference in the reception intensity of the radio signal from the authentication terminal that has been invalidated once, the invalidation release time is set according to the time from the time of the invalidation to the time when the difference occurs, and the invalidation release time is set. The control device for the security system according to any one of claims 1 to 4, which enables the instruction from the invalidated authentication terminal after a lapse of time.

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