JP5634810B2 - Security system - Google Patents

Description

The present invention relates to a security system that notifies a monitoring center via a communication line from a security device installed in a security target when a sensor installed in the security target of a detached house, apartment, office building, etc. detects an intruder, In particular, the present invention relates to a wireless security system that transmits a sensor detection signal to a security device using a wireless signal.

In conventional security systems, intrusion detection sensors such as a magnet sensor that detects opening and closing of doors and windows, a glass breakage detection sensor that detects breakage of windows, or an infrared sensor that detects infrared rays radiated from the human body are targeted for security. Arranged appropriately in the area. An intrusion detection sensor detects when a bandit invades a guarded area that is being monitored, sends an intrusion detection signal to the controller (security device), and the controller reports an intrusion abnormality to a remote monitoring center. To do. As a result, the monitoring center can take necessary measures such as dispatch of guards to the security target area.

In such a security system, a wireless security system that performs wireless communication between an intrusion detection sensor and a controller is widely used (for example, Patent Document 1). In the wired security system, troubles in installation work or aesthetic problems occur, such as routing the wiring to connect the intrusion detection sensor to the controller, or opening a hole in the wall to pass the wiring. The type security system has the advantage that these problems can be solved.

In the wireless security system, intrusion detection sensors are installed around windows, doors, and ceilings. Due to restrictions in the usage environment, a wireless transmitter that transmits wireless signals to the controller is connected to the sensor and placed near the sensor. Install or install in sensor. A battery is used as a power source for the wireless transmitter. Therefore, it is necessary to extend the battery life in order to prevent frequent replacement of the battery. In order to save power, the wireless transmitter is based on unidirectional communication that has only a transmission function for transmitting a detection signal to the controller and does not have a reception function for receiving a signal from the controller.

In order to confirm that the intruder sensor that detects the intruder and the fire sensor that detects the fire are normal and that the detection signal of the sensor reliably reaches the controller, the radio signal propagation check is performed periodically or not. I go regularly.

For example, at the time of installation, the fact that each sensor is normal is transmitted from a wireless transmitter to the security device, and the security device receives this signal to check the state of each sensor. In addition, during operation of the security system, a signal indicating that the sensor is normal is transmitted from the wireless transmitter to the security device every predetermined time, and if the security device fails to receive the signal within the predetermined time, Check for abnormalities and radio propagation status.

By checking the signal transmitted from the wireless transmitter, it is possible to detect a failure from the sensor information included in the signal, to change the layout of the security target, or to construct a facility that transmits radio waves around the installation location, etc. If it is detected that the sensor's detection signal cannot be received by the security device due to changes, the security system is in an appropriate state by changing the installation location, replacing the sensor, etc. Is maintained.

JP 2002-8172 A

As described above, since the conventional wireless security system is based on unidirectional communication from the wireless transmitter to the controller, it cannot be confirmed from the controller whether the sensor is normal at any timing. For example, even if a sensor installed in a security target fails, in order for the controller to detect it, it is necessary to wait for the sensor to transmit a self-diagnosis result transmitted every predetermined cycle.

Therefore, in order to detect a sensor failure early, it is necessary to send a self-diagnosis result indicating that the sensor is normal in a short cycle to the controller. There was a problem that the battery life was shortened.

Therefore, the security system of the present invention can receive a radio signal from the controller by providing the radio transmitter with a reception function, and the radio transmitter returns a result of checking the state of the sensor in response to a request from the controller. This makes it possible to check the state of the sensor at a timing desired by the controller. The wireless transmitter normally cuts off the power supplied to the reception function, and realizes power saving by putting it in an operating state when receiving a wireless signal from the controller. The time for the wireless transmitter to check the sensor status is included in the request signal from the controller. Further, the time interval for checking the state of the sensor by the wireless transmitter is changed according to the security state of the monitoring target so that power is not supplied to the wireless transmitter when unnecessary. Thereby, it is possible to realize a security system that can check the state of the sensor at an appropriate timing while considering power saving.

In order to solve such a problem, the security system of the present invention is connected to a security device that reports an abnormality in the security target to an external device, and a security sensor installed in the security target, and when the security sensor detects the detection signal Is a security system including a wireless transceiver that wirelessly transmits to the security device, wherein the wireless transceiver includes a transmission unit and a reception unit that transmit and receive radio signals to and from the security device, and time counting A power supply unit that supplies power to each unit, a switching unit that controls the supply of power from the power supply unit to the reception unit, and supplies power to the reception unit at predetermined time intervals from the security device. The signal can be received, and the reception unit checks whether the security sensor is normal at a time interval designated by the security device when reception is possible, and controls to transmit the confirmation result to the security device. Characterized by a control unit.

Further, the security device has a mode setting unit that sets a release mode that does not report an abnormality to the outside as a security state of the monitoring target and a monitoring mode that reports an abnormality, and the security device is the monitoring device during the monitoring mode. You may make it designate so that the transmission interval of the state confirmation signal from the said radio | wireless transmitter / receiver to a security device may be shortened rather than in cancellation | release mode.

Furthermore, the mode setting unit further sets a home monitoring mode that is abnormal when a security sensor that monitors the outer periphery of the security target is detected and that is not abnormal when a security sensor that monitors the inside of the security target is detected. In the home monitoring mode, the security device can reduce the transmission interval of the confirmation signal from the wireless transmitter / receiver to the security device with respect to the security sensor for the outer periphery monitoring than the security sensor for the internal monitoring. You may make it instruct | indicate to do.

Further, the security device calculates a mode transition predicted time zone based on past time information that has shifted from the release mode to the monitoring mode, and the security device is configured such that the security device is in the release mode, and the current time However, in the predicted mode transition time zone, it may be instructed to make the transmission interval for transmitting the confirmation signal from the wireless transceiver to the security device shorter than the time interval normally set in the release mode.

According to the security system of the present invention, it is possible to quickly find a failure of a wireless sensor. Moreover, according to the security system of this invention, in addition to the said effect, the battery of a radio | wireless transmitter / receiver can be extended.

It is a block diagram of a security system concerning the present invention. It is a block block diagram of the radio | wireless transmitter / receiver which concerns on this invention. It is a block block diagram of the security apparatus concerning this invention. It is a time chart of the security device concerning this invention, and a radio | wireless transmitter / receiver. It is a flowchart explaining operation | movement of the radio | wireless transmitter / receiver concerning this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a security system to which the present invention is applied. In the security system, the security device 1 is installed in the security targets A1, A2, etc. of detached houses, condominiums, office buildings, etc., and is connected to the monitoring center 5 through a communication network 4 such as a dedicated line, a telephone line, or the Internet. Has been.

In addition, an outer periphery monitoring sensor 2a that detects an intruder from the outside and an internal monitoring sensor 2b that detects the presence of a person in the indoor space are installed in the security target A1. As the outer periphery monitoring sensor 2a, a magnet sensor that is installed in the vicinity of a window or door to detect opening and closing of the window or door by switching a contact by approaching / separating the magnet, vibration at the time of breaking the window, glass breaking detected from sound There are detection sensors. An example of the internal monitoring sensor is a passive infrared sensor (PIR) that detects infrared rays emitted from the human body. In addition, disaster prevention sensors (not shown) that detect heat, smoke, gas leaks, etc. are appropriately installed. When the sensors 2 a and 2 b detect the intrusion of the suspicious person into the security target, the sensors 2 a and 2 b output a detection signal with its own identification information or address to the security device 1 via the wireless transceiver 3.

The wireless transmitter / receiver 3 is wired to the sensor 2 and installed on the wall or ceiling around the sensors 2a and 2b, or is built in and integrated with the sensor 2. The wireless transceiver 3 transmits a detection signal to the security device 1 when the sensor 2 detects it. Further, when the predetermined time comes, power is supplied to the receiving unit 33 and an operation confirmation request signal (hereinafter referred to as “check signal”) is received from the security device 1. Then, the time information for confirming the state of the sensor 2 included in the check signal is stored in the storage unit 36, and the normal / abnormal state of the sensor 2 is confirmed at the designated time, and a confirmation result signal (hereinafter referred to as a confirmation result signal) (Referred to as “status confirmation signal”).

The security device 1 is configured to appropriately switch the security status of the security target according to the user's selection. Here, the security device 1 has at least a “monitoring mode” in which monitoring is performed by the sensor 2 and a “release mode” in which monitoring by the sensor 2 is not performed, as the security state.

For example, it is assumed that the security target A1 is in the monitoring mode and the sensor 2a that monitors the open / closed state of the window detects the opening of the window. At this time, the sensor 2a transmits a detection signal as a wireless signal to the security device 1 via the connected wireless transceiver 3. When the security device 1 receives the detection signal, the security device 1 reports an abnormality to the monitoring center 5 via the communication line. In the monitoring center 5 that has received this abnormality report, appropriate measures are taken such as sending a security guard to the security target A1 that has reported the abnormality.

In addition to the above-described “monitoring mode”, a “room monitoring mode” in which only a specific intrusion monitoring sensor is in a monitoring state may be provided. The occupancy monitoring mode means that if the inside of the building to be guarded is manned and a disaster prevention sensor detects a fire, etc., it will notify and report the occurrence of an abnormality and detect intrusions from outside such as windows and doors. In this state, when the outer periphery monitoring sensor 2a installed for the purpose of detection detects the abnormality, it is informed.

In this occupancy monitoring mode, when an intrusion monitoring sensor other than the specific intrusion monitoring sensor detects it, it is not determined to be abnormal and no notification or notification is performed. In the occupancy monitoring mode, when the specific intrusion monitoring sensor detects, an intrusion delay sound is sounded for a predetermined time, and when there is no cancel operation until the predetermined time elapses, the occurrence of abnormality is notified / reported. This intrusion delay sound is a notification sound for threatening the intruder and for allowing the user to recognize that the intrusion monitoring sensor has detected. When the sensor is detected by carelessness of the user, this can be recognized by an intrusion delay sound, and the occurrence of abnormality can be prevented from being confirmed by a cancel operation within a predetermined time.

On the other hand, if the security target A1 is in the release mode, even if the security device 1 receives the detection signal of the sensor 2, the security device 1 determines that it is based on the action of the user of the security target A1, and does not report an abnormality. . However, when a detection signal that should not be detected by the sensor 2 in a normal state is received even if there is a user, such as a fire sensor, the monitoring center 5 is notified.

Next, the wireless transceiver 3 will be described with reference to FIG. FIG. 2 shows a schematic block of the wireless transceiver 3. The wireless transceiver 3 includes a control unit 30, an antenna 31, a transmission unit 32, a reception unit 33, a sensor I / F 34, a display unit 35, a storage unit 36, a clock unit 37, a power supply 38, and a switch 39.

The antenna 31 transmits and receives radio signals to and from the security device 1. The transmission unit 32 and the reception unit 33 are connected to the antenna 31, and the transmission unit 32 wirelessly transmits the transmission data generated by the control unit 30 to the security device 1 from the antenna 31. The receiving unit 33 receives the radio signal transmitted from the security device 1 from the antenna 31 and generates reception data. In order to save power, the receiving unit 33 is normally cut off from the power supply 38. When the predetermined time stored in the storage unit 36 is reached, the control unit 30 turns on the switch 39 to supply power to the reception unit 33 so that the radio signal can be transmitted to and received from the security device 1.

In the above description, power is always supplied to the transmission unit 32. However, the transmission unit 32 also cuts off power during normal operation, and when a predetermined time is reached, and a detection signal from the sensor 2 is input. In such a case, power may be supplied so that a radio signal can be transmitted to the security device 1. Thereby, further power saving can be achieved. In addition, components that do not require normal operation may be turned off during normal times and turned on when an abnormality is detected and at a predetermined time.

The sensor I / F 34 is an interface for inputting a signal of the sensor 2 connected by wire. The display unit 35 is configured by a buzzer or an LED, and performs predetermined display and ringing according to the detection state of the sensor 2 / the operation state of the wireless transceiver 2.

The storage unit 36 stores an address code determined for each wireless transceiver 3. This address code is a code that can identify the wireless transmitter / receiver 3, and all the wireless signals transmitted from the wireless transmitter / receiver 3 include this address code. The storage unit 36 stores time information for checking the state of the sensor 2 and transmitting a state confirmation signal to the security device 1. This time information includes at least time information for confirming the state of the sensor 2 next time, and this time information is included in the check signal transmitted from the security device 1 immediately before. The time information can be specified in any format as long as it can be specified. For example, a time such as 10:35, 40, or 45 minutes may be specified, or it may be specified three times at intervals of 5 minutes from 10:38. Good.

The storage unit 36 also stores time information for supplying power to the receiving unit 33. In this embodiment, it is assumed that power is supplied to the receiving unit 33 at predetermined time intervals at this time, and this setting can be performed at the time of initial installation, for example. Further, the check signal transmitted from the security device 1 may be stored with the transmission time of the next and subsequent check signals, and the time for supplying power to the receiving unit 33 may be set so that the transmission time is included.

The control unit 30 is a CPU (Central Processing Unit) that performs overall control of each unit. The control unit 30 controls the detection signal to be transmitted as a radio signal to the security device 1 in accordance with the detection input from the connected sensor 2. Further, when the preset time is reached, the switch 39 is turned on so that the power from the power source can be supplied to the receiving unit 33 for a predetermined time so that the wireless transceiver 3 can communicate with the security device 1. Further, when the time designated by the security device 1 is reached, the state of the sensor 2 is confirmed, and control is performed so that the confirmation result is transmitted to the security device 1.

The timer 37 is a clock that measures the current time. Further, the current time is appropriately corrected so as to coincide with the time of the security device 1 by the time information included in the radio signal transmitted from the security device 1. The power supply 38 supplies direct current power to each part. A battery is used as the power source 38. The type of battery is appropriately selected depending on the size of the wireless transceiver 3 such as a dry battery or a button battery.

Next, the security device 1 will be described in detail with reference to FIG. FIG. 3 is a conceptual block diagram of the security device 1. The security device 1 includes an antenna 11, a transmission unit 12 connected to the antenna 11, a reception unit 13 connected to the antenna 11, a mode setting unit 14, an operation unit 15, a notification unit 16, a display unit 17, The controller 10 includes a timer unit 18, a storage unit 19, and a power source 20. In addition to the wireless transmitter / receiver 2 that is wirelessly connected, a sensor I / F for inputting a signal of a sensor connected by wire may be provided.

The antenna 11 transmits and receives radio signals to and from the radio transceiver 3. The transmitter 12 and the receiver 13 are connected to the antenna 11.

The operation unit 15 is operated when the user sets the monitoring mode or the release mode. For example, a button that is pressed when the monitor mode is set or a reader that reads an IC card held by the user when the monitor mode / cancel mode is set.

The mode setting unit 14 performs mode setting processing in accordance with an operation on the operation unit 15 and switches and sets the security state to the release mode or the monitoring mode. When the mode is set by the mode setting unit 14, the mode is stored and held in the storage unit 19 as the current mode, and control corresponding to the current mode is performed.

The reporting unit 16 is connected to the communication line and transmits an abnormality signal or the like to the monitoring center 5. The display unit 17 is configured by a liquid crystal display device, a light emitting diode, or the like, or a microphone or a speaker, and can perform various displays such as occurrence of an abnormality, and can output a buzzer sound or a message sound.

The control unit 10 is a CPU (central processing unit) that performs overall control of each unit of the security device 1 and monitors the intrusion of a suspicious person into the monitoring area. The control part 10 will memorize | store the detection state of the said sensor 2 in the memory | storage part 19 irrespective of a guard state, if the detection signal of the sensor 2 transmitted from the radio | wireless transmitter / receiver 3 is received by the receiving part 13. FIG. If the security state is in the release mode, nothing is done. If the security state is in the monitoring mode, a notification process is immediately executed to the monitoring center 5. In addition, the wireless transceiver 3 is controlled to transmit a check signal including time information for executing the state confirmation of the sensor 2 at a predetermined time.

The time measuring unit 18 is a clock or the like provided therein, and returns the current time in response to an inquiry from the control unit 10.

In addition to the operation program of the control unit 10, the storage unit 19 is a currently set security state, a current detection state for each sensor 2, identification information for identifying the wireless transmission / reception 3, and a check transmitted to the wireless transceiver 3 Signal transmission time information, time information for causing the sensor 2 to perform state confirmation, address information of the sensor 2 and installation location information are stored. In addition, information on a predicted mode change time zone predicted from the time when the past security state is changed to the monitoring mode is also stored. The power supply unit 20 is connected to a commercial power supply and supplies a predetermined voltage to each unit.

Next, the procedure of wireless communication performed between the security device 1 and the wireless transceiver 3 will be described with reference to FIG. FIG. 4A shows a change in the security state of the monitoring target. In FIG. 4A, when the user operates the operation unit 15 of the security device 1 to change the security state from the monitoring mode to the release mode at time T1, and then changes from the release mode to the monitoring mode again at time T2. This shows the mode transition.

FIG. 4B shows the timing at which a check signal is transmitted from the security device 1 to the wireless transceiver 3. As shown in FIG. 4B, here, the time interval D for transmitting the check signal from the security device 1 to the wireless transceiver 3 is set at an equal interval, and the transmission time is stored in the storage unit 36 of the wireless transceiver 3 in advance. It is. If the time information for transmitting the check signal after the next time is transmitted when the check signal is transmitted to the wireless transceiver 3, the interval D may be an arbitrary interval instead of an equal interval.

On the other hand, FIG. 4C shows the timing at which the receiving unit 33 of the wireless transceiver 3 is ready to receive. As described above, the wireless transmitter / receiver 3 uses a battery as a power source. For the purpose of power saving, the power is not supplied to the receiving unit 33 in a normal time, and a predetermined signal is received when a check signal is received from the security device 1. The time switch 39 is controlled to be turned on. Moreover, although the time of the security device 1 and the radio | wireless transmitter / receiver 3 is made to correspond, the predetermined time width is set for the receiving part 33 to be in a receivable state in consideration of some errors. Based on the transmission time information of the next and subsequent check signals transmitted from the security device 1, this time width is set in the time information for supplying power to the receiving unit 33 by the control unit 40 and stored in the storage unit 36.

FIG. 4D shows the timing for transmitting the status confirmation result of the sensor 2 from the wireless transceiver 3 to the security device 1. As described above, power is always supplied to the transmission unit 32, but as with the reception unit 33, the power is cut off during normal times, and the power is supplied to the transmission unit 32 at the timing of transmitting the status confirmation result of the sensor 2. It is also possible to configure so that is supplied.

As shown in FIG. 4D, during the monitoring mode, the interval d1 for transmitting the state confirmation signal of the sensor 2 from the wireless transceiver 3 to the security device 1 is set to be shorter than the interval d2 during the release mode. .
This is because it is necessary to detect at an early stage that the sensor 2 has failed during the monitoring mode, but during the release, even if the sensor 2 detects a signal, it does not notify the monitoring center 5 so that it is always detected quickly. It is not necessary. Thereby, power saving of the wireless transceiver 3 is performed.

  The check signal received by the wireless transmitter / receiver 3 from the security device 1 includes time information, a time interval or the number of times for transmitting the state confirmation signal of the sensor 2 from the wireless transmitter / receiver 3 to the security device 1, and the time when the next reception state is received next time. , And timing information for adjusting the clock. When the wireless transmitter / receiver 3 receives the check signal from the security device 1, the wireless transmitter / receiver 3 checks the state of the sensor 2 at a predetermined time designated by the security device 1 included in the check signal, and uses the confirmation result as the status confirmation signal. Send to. The security device 1 can confirm that the wireless transmitter / receiver 3 is normal from the address information included in the state confirmation signal from the wireless transmitter / receiver 3. On the other hand, if the security device 1 transmits and does not receive a state confirmation signal from the wireless transceiver 3 at the designated time, the security device 1 reports to the monitoring center 5 because there is a high possibility that the wireless transceiver 3 is out of order.

(Release mode from monitoring mode)
Next, the operation when the security state is actually changed by the user will be described. First, a case where the user operates the operation unit 15 of the security device 1 to change the security state from the monitoring mode to the release mode will be described. A check signal is transmitted from the security device 1 to the wireless transceiver 3 at a predetermined time interval D.

Now, it is assumed that the security device 1 transmits a check signal to the wireless transmitter / receiver 3 at time tk1, and then transmits a status confirmation signal of the sensor 2 from the wireless transmitter / receiver 3 to the security device 1 at a predetermined time interval d1. . At this stage, since the security state is still the monitoring mode, the check signal transmitted from the security device 1 to the wireless transmitter / receiver 3 has an interval for transmitting the sensor 2 status confirmation result from the wireless transmitter / receiver 3 to the security device 1. Time information such as d1 is included.

At the next scheduled time tk2, the security device 1 transmits the time and time interval for executing the next status check of the sensor 2 to the wireless transceiver 3 because the security status has been changed to the release mode. In the example of FIG. 4, the reception time of the check signal and the timing for executing the state confirmation of the sensor 2 are set so as not to overlap, but they may be set to the same timing.

(Release mode to monitoring mode)
Next, an operation when the security state is changed from the release mode to the monitoring mode will be described. Now, in the example of FIG. 4, it is assumed that the security state has shifted from the release mode to the monitoring mode at time T2. It is assumed that the security device 1 performs wireless communication by transmitting a check signal to the wireless transceiver 3 at time tl1. Since the security state is the release mode at time tl1, the next reception is possible after time period D from time tl1, and the time interval at which the wireless transceiver 3 transmits the sensor 2 status confirmation signal to the security device 1 Remains d2.

However, in the example of FIG. 4, the security state is changed to the monitoring mode before the period D elapses from the time tl1. Therefore, if the period d2 is set to be a long time, the state confirmation of the sensor 2 may not be executed for a while even after shifting to the monitoring mode.

Therefore, the security device 1 predicts the mode change time from the history of the time (set time) when the mode is changed from the previous release mode to the monitoring mode, and the state confirmation signal transmitted from the wireless transceiver 3 in the predicted time zone. Control to shorten the time interval. In the example of FIG. 4, it is assumed that the time period from Ta to Tb is set as the predicted time zone.

In FIG. 4, since the time tl1 is in the predicted time zone for transition to the monitoring mode, the security device 1 indicates time information such that the interval for transmitting the state confirmation signal from the wireless transceiver 3 is d3 shorter than d2. To do. At time tl2, since the security state is changed from the release mode to the monitoring mode, the time interval for transmitting the status confirmation signal from the subsequent wireless transceiver 3 is set to be after the period d1 set as the time interval in the monitoring mode. Specify time information for.

The start time Ta and the end time Tb of the transition predicted time zone can be set as a time zone with high frequency from the result of obtaining the frequency distribution of the set time. When the set time distribution follows a normal distribution, Ta and Tb may be set by setting a dispersion value from an average value. In this case, the interval at which the check signal is transmitted from the security device 1 may be set so that the time width for supplying power is shortened as the average value is approached even in the predicted time period, and gradually increases again when the average value is exceeded. .

The actual operation of the present invention has been described above. Next, the operation of the wireless transmission / reception 3 will be described using the flowchart of FIG. The operation of the wireless transmitter / receiver 3 in the flowchart of FIG. 5 is the same in both the monitoring mode and the release mode unless otherwise described.

First, in step S01, the presence / absence of a detection signal from the sensor 2 is determined. If there is a detection signal, the security device 1 is notified in step S02. This reports the current status of the sensor regardless of the security status. For example, when the user opens a window in the release mode and the open / close detection sensor detects it, a detection signal is transmitted to the security device 1, and the status of the sensor is stored in the security device 1. On the other hand, also in the monitoring mode, when the sensor 2 detects it, the security device 1 is notified. In the release mode, the process proceeds to step S03 after reporting to the security device 1, but in the monitoring mode, the process may be forcibly terminated after reporting.

Next, in step S03, it is determined whether or not the current time has reached the set time stored in the storage unit 36. This set time includes a set time for supplying power to the receiver 33 and a set time for checking the status of the sensor 2 and transmitting a status check signal from the transmitter 32 to the security device 1. It is determined whether or not. This determination is executed by the control unit 30 comparing the time obtained from the time measuring unit 37 with the set time. This set time is stored in advance in the wireless transmitter / receiver 3 at the time of initial setting, or is included in a received signal (check signal) from the security device 1 when the receiving unit 33 is operating in the past. If any set time has been reached, the process proceeds to step S04. If the set time has not been reached, the process returns to step S01.

In step S04, it is determined whether or not the set time is a reception time at which power is supplied to the reception unit 33 and a check signal is received from the security device 1. If it is the reception time, the power from the power source 38 is supplied to the reception unit 33 in step S05. Next, in step S06, it is determined whether or not a predetermined time for supplying power to the receiving unit 33 has elapsed. The time for supplying power to the receiving unit 33 is set to such an extent that there is substantially no problem even if the notification is delayed when the sensor 2 detects it. If the supply time has elapsed, the process proceeds to step S07. In step S07, the power to the receiving unit 33 is shut off, and the process returns to step S01 again.

In step S08, it is determined whether or not the reception unit 33 has received a check signal from the security device 1 during operation. When the check signal is received, the process proceeds to step S09, and the disclosure time, the time interval, the number of times, etc. for checking the state of the sensor 2 included in the check signal after the next time are stored in the storage unit 36. If the check signal has not been received, the process returns to step S01.

If the check signal from the security device 1 cannot be received in step S08, a cause such as a communication error or an error in the time measuring unit 37 may be considered. In that case, an abnormality signal may be reported to the security device 1. Alternatively, the next set time may be set based on the previous and current time intervals. In that case, you may set so that the electric power supply time to the receiving part 33 may be made longer than usual. As a result, there is a possibility that it can be corrected if an error occurs in the timer 37.

Returning to step S04, if the set time is not the reception time, this is the time when the sensor state confirmation is performed. The state of the sensor 2 connected in step S10 is confirmed. In step S11, the state confirmation result signal of the sensor 2 is transmitted to the security device 1, and the process returns to step S01.

The operation of the wireless transceiver 3 has been described above. Although not described in the flowchart, if there is an error in the time measuring unit 37 due to time information included in the check signal transmitted from the security device 1, it is automatically corrected.

The security system according to the embodiment has been described above. In the above description, the two cases of the monitoring mode and the release mode have been described as the security state. However, in the case where the above-described occupancy monitoring mode is provided, the outer peripheral monitoring sensor 2a is monitoring, Similarly, the interval for transmitting the status confirmation result from the wireless transceiver 3 can be set shorter than the internal monitoring sensor 2b. As a result, when the alarming sensor breaks down, it can be quickly detected.

Similarly, in the monitoring mode, the monitoring interval of the outer periphery monitoring sensor 2a may be shorter than the monitoring interval of the internal monitoring sensor 2b. As a result, it is possible to quickly find a failure of the outer periphery monitoring sensor that requires more vigilance.

In addition, when changing the interval for transmitting the status confirmation signal from the wireless transceiver 3 according to the security state and the type of sensor, it is not always necessary to execute the same mode and sensor type at the same interval, and to some extent It may be executed at random. In this case, the average state confirmation signal transmission interval may be shorter (or longer) than the other.

1. 2. Security device 2a Perimeter monitoring sensor 2b Internal monitoring sensor 3. Wireless transceiver Network 5. Monitoring center

Claims (4)

Including a security device for reporting an abnormality in the security target to an external device, and a wireless transceiver connected to a security sensor installed in the security target and wirelessly transmitting a detection signal to the security device when detected by the security sensor A security system comprising:
The wireless transceiver is
A transmitter and a receiver for transmitting and receiving radio signals to and from the security device;
A timekeeping section that measures time, a power supply section that supplies power to each section,
A switching unit that controls supply of power from the power supply unit to the receiving unit;
Power is supplied to the receiving unit every predetermined time to enable reception of a signal from the security device,
A security system comprising: a control unit that controls whether or not the security sensor is normal at a time interval designated by the security device from the reception device, and controls to transmit the confirmation result to the security device. The security device has a mode setting unit that sets a release mode that does not report an abnormality to the outside as a security state of the monitoring target and a monitoring mode that reports the abnormality,
2. The security system according to claim 1, wherein the security device designates that the transmission interval of the state confirmation signal from the wireless transceiver to the security device is shorter during the monitoring mode than during the release mode. The mode setting unit can set a home monitoring mode that is abnormal when a security sensor that monitors the outer periphery of the security target is detected and that is not abnormal when a security sensor that monitors the inside of the security target is detected. Yes,
In the home monitoring mode, the security device instructs the outer periphery monitoring security sensor to shorten the transmission interval of the status confirmation signal from the wireless transceiver to the security device than the internal monitoring security sensor. The security system according to claim 2, wherein: The security device as a mode transition estimated time period in which the mode shift to the monitoring mode frequent a time zone from the frequency distribution from the release mode is predicted in the past time information shifted to the monitoring mode from the release mode Calculate
In the security device, the security device is normally in the release mode, and a transmission interval for transmitting a status confirmation signal from the wireless transmitter / receiver to the security device is normally set in the release mode when the current time is the predicted mode transition time zone. The security system according to any one of claims 2 to 3, wherein the security system is instructed to make the time interval shorter.

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