JP2019053559A - Control device of security system - Google Patents

Abstract

To provide a control device of a security system capable of determining whether or not to disable a function of an authentication terminal with less power consumption without using a special sensor or the like.SOLUTION: When an operation of an abnormality detection section 4 is instructed, a misplacement determination section 16 of a controller 2 measures a reception strength of a radio wave signal transmitted from each of authentication terminals 3A to 3C by a radio wave strength measurement section 14, and stores it in a storage section 15. When a predetermined time passes from that time, the reception strength of the radio 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 section 15. Then, the instruction from the authentication terminals 3A and 3B having no difference between both of the reception strengths is invalidated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a security system comprising 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. It relates to the control device.

  For example, in a security system that is installed in a house such as a house and detects illegal intruders indoors, when the resident goes out, set a warning mode to watch for illegal intruders, and when the resident comes home To cancel the alert mode, switch to the normal mode. In a system in which switching between the warning / normal mode is performed by a remote controller that is an authentication terminal, a plurality of remote controllers may be used when there are a plurality of residents living in a house.

  In such a case, there may be a remote control that is not carried when the resident goes out and is left indoors. Then, when the person who invades the remote controller operates the remote control, there is a possibility that the alert mode is canceled. For this reason, in a security system including a plurality of remote controllers, a technique for preventing an intruder from releasing a security mode by operating a remote controller left indoors has been desired. As an example of such a technique, there is Patent Document 1, for example.

Japanese Patent Laid-Open No. 2016-200955

  However, in the technique disclosed in Patent Literature 1, a vibration sensor or the like is necessary for a control device arranged indoors to determine whether the remote control is 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 driving is desired.

  The present invention has been made in view of the above circumstances, and an object of the security system is to determine whether or not to invalidate the function of the authentication terminal with less power consumption without using a special sensor or the like. It 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 strength of the radio signal transmitted from each of the plurality of authentication terminals by the measurement unit. And stored in the storage unit. When a certain time has elapsed from that point, the reception strength of the radio 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. And the determination process which invalidates the instruction | indication from the terminal for authentication with no difference in both receiving intensity is performed.

  When the resident is out, the operation of the anomaly detection unit is instructed, and when the security system is in the alert mode, if there are multiple authentication terminals in the vicinity of the control device, the control device The reception intensity at a level corresponding to the distance to the terminal for use is measured. Usually, the resident is still indoors immediately after setting the security system to the security mode. Therefore, also for the authentication terminal that the resident intends to carry when going out, wireless communication is performed and the received intensity is measured and stored.

  After that, when a certain period of time has passed, the resident has gone out, so if you measure the signal strength of the radio signal again at that time, the authentication terminal carried by the resident who went out The reception intensity is not measured, and the difference from the reception intensity stored in the storage unit becomes very large. On the other hand, since the position of the authentication terminal that the resident who has gone out and did not carry it in the vicinity of the control device has not changed, the difference between the remeasured reception intensity and the reception intensity stored in the storage unit is It should be virtually absent.

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

  According to the control device of the security system according to the second aspect, the determination unit validates the instruction from the authentication terminal that cannot measure the reception intensity of the radio signal in the initial measurement of the reception intensity. As a result, it is possible to avoid invalidating an authentication terminal that is not present in the vicinity of the control device from the beginning and whose reception intensity cannot be measured.

  According to the control device of the security system of the third aspect, the authentication terminal transmits a radio signal at every predetermined interval, and the measurement unit sets the time for measuring the reception intensity to be equal to the predetermined interval. As a result, even when the timings at which the respective authentication terminals transmit radio signals are different, the radio signals can be reliably received while suppressing the power consumption of the control device.

  According to the control device of the security system according to the fourth aspect, the determination unit repeatedly executes the determination process if there is no difference in the reception strengths of all the authentication terminals in the second measurement. At that time, the interval for performing the next determination process is set longer than the interval until the previous determination process is performed. Thereby, when the determination process is repeatedly executed, the power consumption of the control device can be reduced.

  According to the control device for a security system according to claim 5, if there is an authentication terminal in which there is no difference in both reception strengths in the second measurement, the determination unit starts counting from that point and repeats the determination process. Run. Then, when a difference occurs in the reception intensity of the radio signal from the authentication terminal once invalidated, the invalidation cancellation time is set according to the time from the invalidation time to the time when the difference occurs. When the invalidation cancellation time elapses, the instruction from the invalidated authentication terminal is validated.

  If the determination process is repeatedly executed, a misplaced authentication terminal is carried by a resident who has returned home, and thus there may be a difference in the reception intensity of the radio signal. For example, it may be the case that the resident has come to pick up the authentication terminal that the resident has left and then goes out. Corresponding to such a situation, the invalidation cancellation time is set as described above. In this way, in order to validate the operation by the authentication terminal that has been left unattended for a long time, it takes a longer time than the authentication terminal that has been left unattended for a short time. Therefore, while restricting the intruder from operating the authentication terminal that was left in the house, the resident came out to pick up the authentication terminal that the misplaced person left, and a long time passed between the outings Then, the operation of the authentication terminal by the resident can be made effective.

Functional block diagram showing the configuration of the security system according to the first embodiment Sequence diagram showing communication processing between the controller and a plurality of authentication terminals The figure which shows the state where some of the plural terminals for authentication were left in the house The figure explaining the transmission / reception state between the terminal for authentication and a controller The figure explaining the transmission / reception state between 2nd Embodiment and 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 illustrating the configuration of the security system according to 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 residence and takes measures such as notification. The security system 1 is not limited to a house such as a residence, and may be installed in a business office 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 into the indoor by an intruder as an abnormality. The controller 2 switches operation and stop of the abnormality detection unit 4 based on an instruction from the authentication terminal 3 through wireless communication. In addition, as the abnormality detection part 4, the window opening / closing sensor which detects opening / closing of a window, the window destruction sensor which detects destruction of a window by the vibration to a window, the fire sensor which detects a fire, and the gas leakage sensor which 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 function units such as a radio wave intensity measurement unit 14, a storage unit 15 that is a memory, and a misplacement determination unit 16. The controller 2 is driven by a battery when installed in a place where there is no power supply or where power supply wiring 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 this embodiment, for example, Bluetooth (registered trademark) is used as a communication protocol.

  The radio wave intensity measuring unit 14 is a functional unit that measures the intensity of a radio wave signal received from the authentication terminal 3 when performing the above wireless communication. The storage unit 15 stores the intensity of the received signal measured by the radio wave intensity measurement unit 14. The misplacement determination unit 16 performs a determination process on the authentication terminal 3 left indoors based on the intensity of the received signal measured by the radio wave intensity measurement 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 this embodiment includes bracelet-type terminals 3A and 3C and a smart phone-type terminal 3B. The number of terminals 3 that can communicate with the controller 2 is not limited to “3”. The form of the authentication terminal 3 is not limited to the bracelet type or the smart phone type.

  Next, the operation of this embodiment will be described with reference to FIGS. The authentication terminal 3 transmits an advertisement packet used in Bluetooth communication, for example, at intervals of 1 second. 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”. When the “warning mode” is set by performing the “crime prevention operation” when the resident goes out, the controller 2 performs authentication communication with the authentication terminal 3 at that time (S2). That is, it communicates with the authentication terminal 3 located around the controller 2 and specifies which of the terminals 3A to 3C they are.

  If the “warning mode” is set, the resident of the residence shifts to “going out” (S3), but the controller 2 receives the radio signal intensity of each of the terminals 3A to 3C when performing the authentication communication described above. Are measured (S4) and stored in the storage unit 15 (S5). Here, the received intensity is a relative value, for example, “8”, “7”, and “9”, respectively.

  Then, the controller 2 waits for about 10 minutes, for example, as a fixed time (S6). During this time, the resident actually goes out and is absent, and as shown in FIG. 3, the authentication terminal 3 </ b> C 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 time elapses, the controller 2 communicates with the authentication terminal 3 for 3 seconds, for example, and measures the reception intensity of the radio signal again (S7). Then, since the positions of the authentication terminals 3A and 3B left in the residence have not changed before going out, the reception intensity shows the same value as the value stored in the storage unit 15 in step S5. During these three seconds, the authentication terminals 3A and 3B transmit advertisement packets to the controller 2 at least twice.

  For example, as shown in FIG. 4, when the authentication terminal 3 transmits the advertisement packet at intervals of T seconds, the controller 2 sets the advertisement packet from the plurality of authentication terminals 3 by setting so as to be receivable only for T seconds. Can always be received once. As a result, when trying to receive advertisement packets transmitted from all the terminals 3 at different times, the advertisement packets transmitted from the respective authentication terminals 3 are suppressed while minimizing the power consumed by the controller 2. It can be acquired with certainty.

  On the other hand, since communication is not substantially established with the authentication terminal 3C carried by the resident, the reception strength is extremely low, for example, “0”. Therefore, the misplacement determination unit 16 of the controller 2 determines that the authentication terminals 3A and 3B are terminals that are misplaced in the residence (S8). Thereafter, even if the authentication terminals 3A and 3B attempt communication, the controller 2 invalidates the communication without connecting them. For example, when the authentication terminal 3 is outside the entrance, the reception intensity is about “3”, so this case is also invalidated. Then, when the resident who has gone out comes home, if there is communication from the authentication terminal 3C carried with him, he / she is connected, and when cancellation of the “warning mode” is instructed, the release is performed. Switch to “Normal mode”.

  At step S4, if there is an authentication terminal 3 that is recognized as a connection target by the controller 2 and the reception strength is “0”, the authentication terminal 3 is “valid” at that time. ", And not subject to invalidity determination processing. This avoids invalidating the authentication terminal 3 that is not present in the vicinity of the controller 3 from the beginning and whose reception intensity cannot be measured.

  As described above, according to the present embodiment, the misplacement determination unit 16 of the controller 2 determines the reception intensity of the radio signal transmitted from each of the authentication terminals 3A to 3C when the operation of the abnormality detection unit 4 is instructed. It is measured by the intensity measuring unit 14 and stored in the storage unit 15. When a certain period of time has elapsed since that time, the reception strength of the radio signal is measured again, and the measured reception strength is compared with the reception strengths of the corresponding authentication terminals 3 </ b> A to 3 </ b> C stored in the storage unit 15. And the determination process which invalidates the instruction | indication from terminal 3A, 3B for authentication whose both receiving intensity does not have a difference is performed.

  That is, it is determined whether or not the authentication terminal 3 has been misplaced using a communication function normally provided in the controller 2, and when it is determined that the authentication terminal 3 has been misplaced, the authentication terminal 3 is used. The instructions given in the case can be invalidated. Then, the controller 2 communicates between the time when the security system 1 is set in the warning mode until a certain time elapses and between the time when the reception intensity is remeasured and the time when the warning mode is canceled. Since there is no need, power consumption can be reduced. Therefore, when the controller 2 operates by battery driving, the operation time can be extended.

  In addition, the misplacement determination unit 16 validates an instruction from the authentication terminal 3 whose reception strength is “0” in the first reception strength measurement. Accordingly, it is possible to avoid invalidating the authentication terminal 3 that is not present in the vicinity of the controller 2 from the beginning and whose reception intensity cannot be measured.

  Further, the radio wave intensity measurement unit 14 sets the time for measuring the reception intensity equal to the predetermined interval T at which the authentication terminal 3 transmits the advertisement packet, and therefore 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 denoted 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 strengths of all the authentication terminals 3 in the re-measurement 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, this corresponds to the first fixed time. For the low processing interval, control is performed such that the next measurement is performed after a long interval of “d” and the next measurement is performed after a long interval of “2d”. Thereby, 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 shown in the drawings, and the following modifications or expansions are possible.
Processing may be executed as follows. The misplacement determination unit 16 starts timing from the point in time when there is an authentication terminal 3 in which there is no difference in both reception strengths in the second measurement, and repeats the determination process as in the second embodiment. Then, when a difference occurs in the reception intensity of the radio signal from the authentication terminal 3 once invalidated, the invalidation cancellation time is set according to the time from the invalidation time to the time when the difference occurs. When the invalidation cancellation time elapses, the instruction from the invalidated authentication terminal 3 is validated.

  When the determination process is repeatedly executed, the authentication terminal 3 that has been misplaced may be carried by a resident who has returned home, thereby causing a difference in the reception intensity of the radio signal. For example, this may be the case when the resident has once picked up the authentication terminal 3 left behind and then went out. Corresponding to such a situation, the invalidation cancellation time is set as described above. In this way, in order to validate the operation by the authentication terminal 3 that has been left unattended for a long time, a longer time than that of the authentication terminal 3 that has been left unattended for a short time is required. Therefore, while restricting the intruder from operating the authentication terminal 3 that has been left in the house, the resident has come out to pick up the authentication terminal 3 that the resident has misplaced, and during that time, the user stays for a long time. If elapses, the operation of the authentication terminal 3 by the resident can be validated.

The interval at which the authentication terminal 3 transmits the advertisement packet is not limited to 1 second.
The fixed time is not limited to 10 minutes, and may be appropriately changed according to the individual design. Also, the communication time when re-measuring the reception intensity is not limited to 3 seconds.
The communication protocol is not limited to Bluetooth.

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

Claims (5)

A control device for controlling the operation and stop of an abnormality detection unit capable of detecting an indoor abnormality;
The control device of the security system that performs wireless communication with the control device and includes a plurality of authentication terminals that instruct the operation and stop,
A measurement unit for measuring the reception intensity of the radio signal used for the wireless communication;
A storage unit for storing the received intensity measured by the measurement unit;
When the operation of the abnormality detection unit is instructed, the reception strength of the radio 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 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 between the reception strengths of the two. A control device for a security system, comprising: a determination unit that performs determination processing for invalidating an instruction from a terminal.   2. The security system control device according to claim 1, wherein the determination unit validates an instruction from an authentication terminal that has failed to measure a radio signal reception intensity in an initial reception intensity measurement. 3. The authentication terminal transmits the radio signal at predetermined intervals,
The security system control device according to claim 1, wherein the measurement unit sets a time for measuring the reception intensity equal to the predetermined interval.   In the re-measurement, the determination unit repeatedly executes the determination process if there is no difference in the reception strengths of all the authentication terminals, and sets the interval for performing the next determination process as the interval until the previous determination process is performed. The control apparatus of the security system as described in any one of Claim 1 to 3 set longer than this. In the second measurement, when there is an authentication terminal in which there is no difference in both reception strengths, the determination unit starts counting from that point and repeatedly executes the determination process.
When there is a difference in the radio signal reception intensity from the authentication terminal once invalidated, an invalidity cancellation time is set according to a time from the invalidation time to the time when the difference occurs, and the invalidation cancellation time is set. The control device of the security system according to any one of claims 1 to 4, wherein when the time elapses, an instruction from the invalidated authentication terminal is validated.

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