JP6982832B2 - Fire alarm, fire alarm system, abnormality judgment method and program - Google Patents

Description

The present invention relates to a fire alarm system, a fire alarm system, a communication abnormality determination method and a program in a fire alarm system.

Conventionally, there is a fire alarm system consisting of a master unit and a plurality of slave units, in which the master unit and the plurality of slave units perform wireless communication. The master unit and the plurality of slave units are each equipped with a sensor for detecting a fire. A system that issues a fire alarm in conjunction with a master unit and a plurality of slave units by wirelessly communicating the detection result of a sensor between such a master unit and a plurality of slave units installed in each room is disclosed. (For example, Patent Document 1). This makes it possible to notify a person who is in a room other than the room where the fire has occurred.

Japanese Unexamined Patent Publication No. 2012-4826

In such a fire alarm system, when a plurality of slave units are in a dead battery state (a state in which the remaining battery level is equal to or less than a predetermined state), the plurality of slave units make an utterance by a speaker having the battery dead. For example, suppose that one of the plurality of slave units has run out of battery. The first handset speaks that the battery is dead. For example, if the resident of the facility to which the fire alarm system is applied is absent for a long period of time, the one handset will continue to speak, and the battery of the one handset will be exhausted, eventually becoming inoperable. ..

In addition, the master unit periodically monitors multiple slave units, and specifically, it transmits a monitoring signal including a command to return the status of the slave unit to the plurality of slave units, and receives the monitoring signal. The handset will return its own status. For example, if the master unit does not receive a reply from the slave unit that has transmitted the monitoring signal, the master unit speaks through its own speaker that the slave unit has an abnormality. As described above, since the one handset that is inoperable due to the dead battery cannot reply to the monitoring signal, the master unit utters that there is an abnormality in the one handset. Since the resident is absent for a long period of time and the master unit continues to speak, the battery of the master unit is exhausted and eventually becomes inoperable.

In addition, multiple slave units are aware that the monitoring signal is periodically transmitted from the master unit, and if the monitoring signal is not transmitted from the master unit, it means that the master unit has an abnormality. Speak. As described above, since the master unit that is inoperable due to the dead battery cannot transmit the monitoring signal, the plurality of slave units other than the above-mentioned one slave unit speak that the master unit has an abnormality. Since the resident is absent for a long period of time and the plurality of slave units continue to speak, the batteries of the plurality of slave units are exhausted and eventually become inoperable.

As described above, there is a problem that the master unit and the plurality of slave units in the fire alarm system are chained to consume the battery.

Therefore, an object of the present invention is to provide a fire alarm or the like that can suppress a chain of battery consumption.

The fire alarm according to one aspect of the present invention is a fire alarm that wirelessly communicates with at least one slave unit and operates as a master unit with respect to the at least one slave unit, and is periodic or irregular. By monitoring the at least one handset, the first monitoring unit that determines whether or not the at least one handset has an abnormality and the first monitoring unit have an abnormality in the at least one handset. A first notification unit for notifying the abnormality when it is determined to be present is provided, and the first monitoring unit receives a signal indicating that the battery is dead from any one of the at least one slave units. Does not determine that the slave unit has an abnormality even if it cannot receive the radio wave from the slave unit in the monitoring.

The fire alarm system according to one aspect of the present invention includes the above-mentioned fire alarm and the at least one slave unit.

The abnormality determination method according to one aspect of the present invention includes at least one slave unit and a fire alarm that performs wireless communication with the at least one slave unit and operates as a master unit for the at least one slave unit. An abnormality determination method for determining a communication abnormality, which is a step of determining whether or not there is an abnormality in the at least one slave unit by monitoring the at least one slave unit periodically or irregularly. In the step of determining, the step of notifying the abnormality when it is determined that the at least one slave unit has an abnormality is included, and in the step of determining the determination, the at least one slave unit in the monitoring. After receiving the signal indicating that the battery is dead from any of the slave units, even if the radio waves from the slave unit cannot be received, it is not determined that the slave unit has an abnormality.

The program according to one aspect of the present invention is a program that causes a computer to execute the above-mentioned abnormality determination method.

According to the fire alarm or the like according to one aspect of the present invention, the chain of battery consumption can be suppressed.

FIG. 1 is a configuration diagram showing an example of a fire alarm system according to an embodiment. FIG. 2 is a configuration diagram showing an example of a fire alarm and a slave unit according to the embodiment. FIG. 3 is a flowchart showing an example of the basic operation of the fire alarm according to the embodiment. FIG. 4 is a flowchart showing an example of an abnormality determination operation of the fire alarm according to the embodiment. FIG. 5 is a flowchart showing an example of the basic operation of the slave unit according to the embodiment. FIG. 6 is a flowchart showing an example of the abnormality determination operation of the slave unit according to the embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, all of the embodiments described below show a preferable specific example of the present invention. Therefore, the numerical values, shapes, components, arrangement and connection forms of the components, steps (processes), order of steps, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. .. Therefore, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept of the present invention will be described as arbitrary components.

Further, each figure is a schematic view and is not necessarily exactly illustrated. Further, in each figure, the same components are designated by the same reference numerals.

(Embodiment)
Hereinafter, embodiments will be described with reference to FIGS. 1 to 6.

FIG. 1 is a configuration diagram showing an example of a fire alarm system 1 according to an embodiment.

The fire alarm system 1 is applied to facilities such as houses, detects a fire, and notifies that a fire has occurred. The fire alarm system 1 may be applied to facilities such as offices and commercial facilities. The fire alarm system 1 includes a fire alarm 10 having a fire detection sensor and at least one handset 20. The fire alarm 10 and at least one handset 20 are installed, for example, on the ceiling of a facility, but may be installed on a wall or the like. In the present embodiment, at least one handset 20 is a plurality of handset 20s. The fire alarm 10 operates as a master unit for at least one slave unit 20. Note that operating as a master unit with respect to at least one slave unit 20 means, for example, that the master unit plays a central role in controlling at least one slave unit 20. For example, the master unit broadcasts a beacon signal, and at least one slave unit 20 operates in response to the received beacon signal, so that the fire alarm 10 operates as a master unit with respect to at least one slave unit 20. do. Alternatively, the fire alarm 10 operates as a master unit for at least one slave unit 20 when the master unit transmits a control signal to at least one slave unit 20 by unicast. The fire alarm 10 and at least one slave unit 20 have basically the same functions (fire detection function, fire alarm function, etc.) except that the fire alarm 10 serves as a master unit. For example, the fire alarm 10 and the slave unit 20 are different products (that is, products having different product numbers), but they may be the same product, and in this case, a plurality of devices having the same specifications. The fire alarm 10 and the slave unit 20 that act as the master unit may be selected by the user.

Wireless communication is performed between the fire alarm 10 and at least one slave unit 20. For example, since the fire alarm 10 and at least one slave unit 20 are so-called paired, they can wirelessly communicate with each other. For example, the fire alarm system 1 has a star-shaped network topology centered on the fire alarm 10. As a result, when any one of the fire alarm 10 and the fire detection sensor included in at least one slave unit 20 detects the occurrence of a fire, the detection information indicating the occurrence of a fire is the fire alarm 10 and at least one slave unit. Shared by 20, the fire alarm 10 and at least one handset 20 can interlock to issue a fire alarm. For example, it is possible to notify a person who is in a room other than the room where the fire broke out. The above network topology is not limited to the star type. For example, the communication between the plurality of slave units 20 does not have to be performed via the fire alarm 10, and even if the slave unit information acquisition unit 29 described later directly communicates with the plurality of slave units 20. good.

For wireless communication in the fire alarm system 1, it is necessary to use a band for security purposes, which has few interference waves and enables highly reliable communication. For example, in Japan, a frequency band of 426.25 MHz or more and 426.8375 MHz or less, which is used for a radio station of a low power security system, is used for wireless communication for fire alarm use.

Next, the configurations of the fire alarm 10 and the slave unit 20 constituting the fire alarm system 1 will be described with reference to FIG.

FIG. 2 is a configuration diagram showing an example of the fire alarm 10 and the slave unit 20 according to the embodiment. In FIG. 2, the sensors for detecting a fire provided in the fire alarm 10 and the slave unit 20 are not shown. The method by which the sensor detects a fire is not particularly limited. For example, the sensor may be an optical smoke detection sensor, or may detect a fire by detecting smoke in the event of a fire by utilizing diffused reflection of light. Further, for example, the sensor may be a heat detection sensor, or may detect a fire by detecting heat at the time of a fire. Further, for example, the sensor may be a carbon monoxide detection sensor, and may detect a fire by detecting the concentration of carbon monoxide generated by combustion in the event of a fire. Further, for example, the sensor may be an infrared detection sensor, or may detect a fire by detecting infrared rays radiated by combustion in the event of a fire.

The fire alarm 10 includes a control unit 11, a notification unit 15, a communication unit 16, a memory 17, and a battery 18. Further, as described above, the fire alarm 10 and the slave unit 20 have basically the same function of detecting a fire and notifying that a fire has occurred. Therefore, the slave unit 20 also includes a control unit 21, a notification unit 25, a communication unit 26, a memory 27, and a battery 28, like the fire alarm 10. Since each component of the fire alarm 10 and each component of the slave unit 20 have basically the same functions, they will be described in parallel below.

The communication units 16 and 26 are communication interfaces for the fire alarm 10 and at least one slave unit 20 to perform wireless communication, and include an antenna, a radio signal transmission / reception circuit, and the like. The communication unit 16 performs wireless communication with at least one slave unit 20 according to an instruction from the control unit 11, and the communication unit 26 performs wireless communication with the fire alarm 10 according to an instruction from the control unit 21.

The control unit 11 is a processing unit that controls the notification unit 15, the communication unit 16, and the memory 17. The control unit 21 is a processing unit that controls the notification unit 25, the communication unit 26, and the memory 27. The control units 11 and 21 are realized by, for example, a microcomputer (microcomputer). The control units 11 and 21 (microcomputer) are, for example, a ROM for holding a program, a RAM as a temporary storage area, a processor for executing the program, input / output circuits such as an A / D converter and a D / A converter, and a counter. It is an LSI composed of a timer or the like. For example, the times in the control units 11 and 21 are synchronized. The control unit 11 includes a monitoring unit 12, a notification unit 13, and an external output unit 14 as functional components. These functional components are realized by the control unit 11 executing a program. Further, the control unit 21 includes a monitoring unit 22, a notification unit 23, an external output unit 24, and a slave unit information acquisition unit 29 as functional components. These functional components are realized by the control unit 21 executing a program.

The monitoring unit 12 is a first monitoring unit that determines whether or not there is an abnormality in at least one slave unit 20 by monitoring at least one slave unit 20 periodically or irregularly. Specifically, the monitoring unit 12 transmits a monitoring signal including a command to return the status of the slave unit 20 to at least one slave unit 20 periodically (for example, every 24 hours) (to the communication unit 16). Send). The state of the handset 20 is, for example, the state (normal or abnormal) of the sensor and the notification unit 25 included in the handset 20, the state of the remaining battery level of the handset 20, and the like. The monitoring unit 12 determines, for example, that there is an abnormality in the handset 20 that has sent a reply indicating that these are abnormal. Further, the monitoring unit 12 determines that there is an abnormality in the handset 20 that did not reply to the monitoring signal (in other words, could not receive the radio wave).

The monitoring unit 22 is a second monitoring unit that determines whether or not there is an abnormality in the fire alarm 10 by monitoring the fire alarm 10 periodically or irregularly. Specifically, the monitoring unit 22 recognizes that a monitoring signal is transmitted from the fire alarm 10 on a regular basis (for example, every 24 hours), and the monitoring of the fire alarm 10 is periodic. Alternatively, it means monitoring the transmission of a monitoring signal from the fire alarm 10 on an irregular basis. The monitoring unit 22 determines that the fire alarm 10 has an abnormality, for example, when the monitoring signal is not transmitted from the fire alarm 10 at a regular timing. For example, the monitoring unit 22 may immediately determine that the fire alarm 10 has an abnormality when the monitoring signal is not transmitted from the fire alarm 10 at a regular timing. Further, for example, the monitoring unit 22 does not transmit the monitoring signal from the fire alarm 10 at a periodic timing, and even if it waits for a predetermined period (for example, one hour or the like) after that, the fire alarm does not transmit. It may be determined that there is an abnormality in 10. Further, for example, even if the monitoring unit 22 determines that the fire alarm 10 has an abnormality when the monitoring signal is not transmitted from the fire alarm 10 at a periodic timing is repeated a predetermined number of times. good.

When the fire alarm 10 runs out of battery, the notification unit 13 transmits a signal indicating that the battery is dead to at least one slave unit 20 (transmits to the communication unit 16). Similarly, when the slave unit 20 runs out of battery, the notification unit 23 transmits a signal indicating that the battery is exhausted to the fire alarm 10 (transmits to the communication unit 26). Running out of battery means that the remaining battery level is below the specified level. For example, the remaining battery level can be measured by the A / D converters of the control units 11 and 21 (microcomputer). For example, the control units 11 and 21 measure the remaining battery level every predetermined time (for example, one hour or the like). For example, the control units 11 and 21 determine that the battery is dead when the remaining battery level becomes 2.8 V or less with respect to the 3.0 V battery. However, the voltage at which the battery is determined to be dead is higher than the voltage at which the fire alarm 10 and the slave unit 20 are inoperable. Therefore, the fire alarm 10 and the slave unit 20 can operate normally for a predetermined period (for example, one month or the like) after the battery runs out. The fact that the fire alarm 10 and the slave unit 20 are in an inoperable state is also expressed as a completely dead battery.

The external output unit 14 is a first external output unit that outputs information indicating an abnormality of at least one slave unit to an external device (transmits to the communication unit 16). Similarly, the external output unit 24 is a second external output unit that outputs information indicating an abnormality of the fire alarm 10 to an external device (transmits to the communication unit 26). The external device is, for example, a mobile terminal such as a smartphone or a tablet. The external device is not limited to the mobile terminal, and may be an IoT (Internet of Things) device. For example, the communication units 16 and 26 are communicably connected to an external device via a gateway. If the network between the fire alarm 10 and the slave unit 20 and the network between the fire alarm 10 and the gateway have different protocols, the communication unit 16 communicates with the slave unit 20. The antenna and transmission / reception circuit for communication with the gateway may be provided separately from the antenna and transmission / reception circuit for communication. Similarly, the communication unit 26 may include an antenna for communication with the gateway and a transmission / reception circuit separately from the antenna for communication with the fire alarm 10 and the transmission / reception circuit. Thereby, for example, even when the resident of the facility is absent, the resident can confirm the abnormality of the fire alarm 10 or at least one slave unit 20 by an external device (mobile terminal or the like).

The slave unit information acquisition unit 29 included in the control unit 21 of the slave unit 20 will be described later.

The notification unit 15 is a first notification unit that notifies the abnormality when the monitoring unit 12 determines that there is an abnormality in at least one slave unit 20. Similarly, the notification unit 25 is a second notification unit that notifies the abnormality when the monitoring unit 22 determines that the fire alarm 10 has an abnormality. The notification units 15 and 25 also notify the occurrence of a fire when a fire occurs. The method by which the notification units 15 and 25 notify the occurrence of an abnormality or fire is not particularly limited. For example, the notification units 15 and 25 may be speakers or buzzers, and may notify the occurrence of an abnormality or fire by voice or buzzer sound. For example, the notification units 15 and 25 notify that a fire has occurred when a fire occurs. Further, when the slave unit 20 has an abnormality, the notification unit 15 notifies the contents of the abnormality of the slave unit 20. For example, when the communication unit 16 cannot receive the radio wave from the slave unit 20, the notification unit 15 notifies (utters) that there is a communication abnormality with the slave unit 20. Further, when the fire alarm 10 has an abnormality, the notification unit 25 notifies the content of the abnormality of the fire alarm 10. For example, when the communication unit 26 cannot receive the radio wave from the fire alarm 10, the notification unit 25 notifies (utters) that there is a communication abnormality with the fire alarm 10. For example, utterances such as communication abnormalities are often made every few tens of seconds, so that the battery consumption is large.

The memories 17 and 27 are ROMs, RAMs, and the like, and the memories 17 and 27 may store programs executed by the control units 11 and 21. The memory 17 is a storage unit that stores information in which the address information of the slave unit 20 that has transmitted the signal indicating that the battery is dead and the information indicating that the battery is exhausted are stored among at least one slave unit 20. When the battery of the slave unit 20 is exhausted, the signal indicating the battery exhaustion transmitted by the notification unit 23 to the fire alarm 10 includes the address information of the slave unit whose battery is exhausted (for example, MAC (Media Access)). Control) address or logical address, etc.) is included. When the communication unit 16 receives the signal indicating that the battery is dead, the control unit 11 stores the address information and the information indicating that the battery is dead in the memory 17. Further, the memory 27 stores information indicating that the fire alarm 10 is out of battery when the communication unit 26 receives a signal indicating that the battery is dead from the fire alarm 10. Since there is one master unit (fire alarm 10) for at least one slave unit, the memory 27 does not need to store the address information of the fire alarm 10. As with the memory 17, the memory 27 may store information in which the address information of the fire alarm 10 that has transmitted the signal indicating that the battery is dead and the information indicating that the battery is dead are associated with each other.

The batteries 18 and 28 are power sources for driving the fire alarm 10 and the slave unit 20. The batteries 18 and 28 are, for example, lithium batteries and the like, but the type thereof is not particularly limited.

Next, the operation of the fire alarm 10 will be described with reference to FIGS. 3 and 4.

FIG. 3 is a flowchart showing an example of the basic operation of the fire alarm 10 according to the embodiment.

The monitoring unit 12 monitors at least one handset 20 (step S11), determines whether or not there is an abnormality in at least one handset 20 (step S12), and the notification unit 15 determines whether or not there is an abnormality in the handset 20 (step S12). When it is determined that there is an abnormality in at least one slave unit 20 (Yes in step S12), the abnormality is notified (step S13). Here, after the communication unit 16 receives the signal indicating that the battery is dead from the slave unit 20 of at least one slave unit 20, the monitoring unit 12 transmits the signal indicating that the battery is dead. In the monitoring, even if the radio wave from the slave unit 20 cannot be received, it is not determined that the slave unit 20 has an abnormality. This will be described with reference to FIG.

FIG. 4 is a flowchart showing an example of an abnormality determination operation of the fire alarm 10 according to the embodiment.

First, the monitoring unit 12 (communication unit 16) receives a signal indicating that the battery is dead from any of the slave units 20 of at least one slave unit 20 (step S21). As described above, the notification unit 23 included in the handset 20 having run out of battery transmits a signal indicating that the battery is dead to the fire alarm 10, so that the monitoring unit 12 receives the signal indicating that the battery is dead. can do.

At this time, the information in which the address information of the slave unit 20 that has transmitted the signal indicating that the battery is dead and the information indicating that the battery is dead is stored in the memory 17.

Further, when the external output unit 14 receives a signal indicating that the battery is dead from the slave unit 20 of at least one slave unit 20, the external output unit 14 informs the external device of information indicating that the slave unit 20 is dead. Output. As a result, for example, even when the resident of the facility is absent, the resident can confirm that the battery of the slave unit 20 has run out by using an external device (mobile terminal or the like).

Even after receiving the signal indicating that the battery is dead from the handset 20, can the monitoring unit 12 periodically monitor the handset 20 and receive a reply to the monitoring signal from the handset 20 (in other words, the child). (Step S22), it is determined whether or not the radio wave from the machine 20 can be received. As described above, since the slave unit 20 normally operates for a predetermined period (for example, one month) even after the battery of the slave unit is exhausted, the battery exhaustion within the predetermined period after the battery exhaustion of the slave unit 20 is not a factor. Communication abnormality can be determined.

If the monitoring unit 12 can receive radio waves from the slave unit 20 (Yes in step S22), the monitoring unit 12 does not determine that the slave unit 20 has an abnormality (step S23). In other words, the notification unit 15 does not notify the abnormality of the slave unit 20. However, if the radio wave contains information indicating that the handset 20 has an abnormality, the monitoring unit 12 may determine that the handset 20 has the abnormality, and the notification unit 15 may determine that the handset 20 has the abnormality. An abnormality may be notified.

When the monitoring unit 12 can receive the radio wave from the slave unit 20 (Yes in step S22), the monitoring unit 12 determines whether or not it is within a predetermined period from the time when the signal indicating that the battery is dead is received (step S24). The processing in step S24 is possible by the function of the counter, timer, etc. of the control unit 11 (microcomputer).

Even after receiving the signal indicating that the battery is dead from at least one slave unit 20, the monitoring unit 12 has received the signal indicating that the battery is dead from the slave unit 20 within a predetermined period from the time when the slave unit 20 has received the signal indicating that the battery is dead. If the radio wave cannot be received (Yes in step S24), it is determined that the slave unit 20 has an abnormality (step S25). In other words, the notification unit 15 notifies the abnormality of the slave unit 20. Although the handset 20 can operate normally for a predetermined period after the battery runs out, the fact that the handset 20 cannot receive the radio wave within the predetermined period means that the handset 20 has run out of battery. This is because there is a possibility that the monitoring signal cannot be replied to due to a factor other than the above. The monitoring unit 12 periodically monitors at least one handset by collating the address information of the handset 20 that cannot receive radio waves with the address information stored in the memory 17. It is determined whether or not there is an abnormality in the slave unit 20 (the slave unit 20 that cannot receive radio waves). Thereby, it can be determined whether or not the handset 20 that cannot receive the radio wave is the handset 20 that has transmitted the signal indicating that the battery is dead.

On the other hand, if the monitoring unit 12 cannot receive the radio wave from the slave unit 20 after a predetermined period has elapsed from the time when the signal indicating that the battery is dead is received from the slave unit 20 (No in step S24), the slave unit 20 It is determined that there is no abnormality in (step S23). In other words, the notification unit 15 does not notify the abnormality of the slave unit 20. If the radio wave from the handset 20 cannot be received after the lapse of a predetermined period, it can be said that the handset 20 is in an inoperable state because the battery is completely exhausted.

As a result, the monitoring unit 12 does not determine that the slave unit 20 has a communication abnormality due to the battery exhaustion, and the notification unit 15 is suppressed from notifying the abnormality. By suppressing the notification of the abnormality by the notification unit 15, it is possible to suppress the consumption of the battery of the fire alarm 10. In this way, it is possible to prevent the battery consumption chain, specifically, the fire alarm 10 from being linked to the battery-depleted slave unit 20 to consume the battery.

Further, when the external output unit 14 cannot receive the radio wave from the slave unit 20 after receiving the signal indicating that the battery is dead from the slave unit 20 of at least one slave unit 20, the external output unit 14 informs the external device of the slave unit. Outputs information indicating that 20 is in an inactive state. Thereby, for example, even when the resident of the facility is absent, the resident can confirm that the battery of the slave unit 20 is completely exhausted by an external device (mobile terminal or the like).

Next, the operation of the slave unit 20 will be described with reference to FIGS. 5 and 6.

FIG. 5 is a flowchart showing an example of the basic operation of the handset 20 according to the embodiment.

The monitoring unit 22 monitors the fire alarm 10 (step S31) to determine whether or not there is an abnormality in the fire alarm 10 (step S32), and the notification unit 25 has the monitoring unit 22 fire alarm. When it is determined that there is an abnormality in 10 (Yes in step S32), the abnormality is notified (step S33). Here, even if the monitoring unit 22 cannot receive the radio wave from the fire alarm system 10 in the monitoring of the fire alarm system 10 after the communication unit 26 receives the signal indicating that the battery is dead from the fire alarm system 10. It is not determined that the fire alarm 10 has an abnormality. This will be described with reference to FIG.

FIG. 6 is a flowchart showing an example of the abnormality determination operation of the handset 20 according to the embodiment.

First, the monitoring unit 22 (communication unit 26) receives a signal indicating that the battery is dead from the fire alarm 10 (step S41). As described above, the notification unit 13 included in the fire alarm system 10 that has run out of battery transmits a signal indicating that the battery is dead to at least one slave unit 20, so that the monitoring unit 22 indicates that the battery is dead. Can receive signals.

At this time, information indicating that the fire alarm 10 is out of battery is stored in the memory 17.

Further, when the external output unit 24 receives a signal indicating that the battery is dead from the fire alarm 10, the external output unit 24 outputs information indicating that the fire alarm 10 is dead to the external device. As a result, for example, even when the resident of the facility is absent, the resident can confirm that the battery of the fire alarm 10 has run out by using an external device (mobile terminal or the like).

Even after receiving the signal indicating that the battery is dead from the fire alarm 10, the monitoring unit 22 periodically monitors the fire alarm 10 and whether the monitoring signal is transmitted from the fire alarm 10 (in other words, a fire). Whether or not the radio wave from the alarm device 10 can be received) is determined (step S42). As described above, since the fire alarm 10 normally operates for a predetermined period (for example, one month) even after the battery has run out, the cause is that the battery has run out within the predetermined period after the battery of the fire alarm 10 has run out. It is possible to determine a communication abnormality that does not occur.

If the monitoring unit 22 can receive radio waves from the fire alarm 10 (Yes in step S42), the monitoring unit 22 does not determine that the fire alarm 10 has an abnormality (step S43). In other words, the notification unit 25 does not notify the abnormality of the fire alarm 10. However, if the radio wave contains information indicating that the fire alarm 10 has an abnormality, the monitoring unit 22 may determine that the fire alarm 10 has the abnormality.

When the monitoring unit 22 can receive the radio wave from the fire alarm 10 (Yes in step S42), the monitoring unit 22 determines whether or not it is within a predetermined period from the time when the signal indicating that the battery is dead is received (step S44). The processing in step S44 becomes possible by the function of the counter, the timer, etc. which the control unit 21 (microcomputer) has.

If the monitoring unit 22 cannot receive the radio wave from the fire alarm 10 within a predetermined period from the time when the signal indicating that the battery is dead is received from the fire alarm 10 (Yes in step S44), the fire alarm 10 has an abnormality. It is determined that there is (step S45). In other words, the notification unit 25 notifies the abnormality of the fire alarm 10. Although the fire alarm 10 can operate normally for a predetermined period after the battery runs out, the fact that the fire alarm 10 cannot receive the radio wave within the predetermined period means that the fire alarm 10 has run out of battery. This is because there is a possibility that the monitoring signal cannot be transmitted due to a factor other than the above.

On the other hand, if the monitoring unit 22 cannot receive the radio wave from the fire alarm 10 after a predetermined period has elapsed from the time when the signal indicating that the battery is dead is received from the fire alarm 10 (No in step S44), the fire alarm unit 22 It is determined that there is no abnormality in 10 (step S43). In other words, the notification unit 25 does not notify the abnormality of the fire alarm 10. If the radio wave from the fire alarm 10 cannot be received after the lapse of a predetermined period, it can be said that the fire alarm 10 is in an inoperable state because the battery is completely exhausted.

As a result, the monitoring unit 22 does not determine that the fire alarm 10 has a communication abnormality due to the battery exhaustion, and the notification unit 25 is suppressed from notifying the abnormality. By suppressing the notification unit 25 from notifying the abnormality, it is possible to suppress the consumption of the battery of the slave unit 20. In this way, it is possible to prevent the chain of battery consumption, specifically, the slave unit 20 from being linked to the fire alarm 10 that has run out of battery to consume the battery.

Further, when the external output unit 24 cannot receive the radio wave from the fire alarm 10 after receiving the signal indicating that the battery is dead from the fire alarm 10, the external output unit 24 indicates to the external device that the fire alarm 10 is in an inoperable state. Output the information shown. Thereby, for example, even when the resident of the facility is absent, the resident can confirm that the battery of the fire alarm 10 is completely exhausted by an external device (mobile terminal or the like).

Further, in the present embodiment, at least one handset 20 is a plurality of handset 20, and each of the plurality of handset 20 is another handset when the radio wave from the fire alarm 10 cannot be received. A slave unit information acquisition unit 29 for acquiring information from 20 is provided. Since the fire alarm system 1 has a star-shaped network topology centered on the fire alarm system 10, if the battery of the fire alarm system 10 is completely exhausted, the fire alarm system may not be linked.

Therefore, the handset information acquisition unit 29 directly acquires the detection result of the fire detection sensor included in the other handset 20 from the other handset 20 (makes the communication unit 26 receive it). As a result, even if the fire alarm 10 is in a non-operating state, the detection information indicating the occurrence of a fire is shared among the plurality of slave units 20, and the plurality of slave units 20 can issue a fire alarm in conjunction with each other. can. The slave unit information acquisition unit 29 may acquire information from another slave unit 20 even when the radio wave from the fire alarm 10 can be received.

As described above, the fire alarm 10 according to the present embodiment is a fire alarm that wirelessly communicates with at least one slave unit 20 and operates as a master unit for at least one slave unit 20. The fire alarm 10 periodically monitors at least one slave unit 20 to determine whether or not there is an abnormality in at least one slave unit 20, and the monitoring unit 12 has at least one child. When it is determined that the machine 20 has an abnormality, the notification unit 15 for notifying the abnormality is provided. After receiving the signal indicating that the battery is dead from the slave unit 20 of at least one slave unit 20, the monitoring unit 12 may not be able to receive the radio wave from the slave unit 20 in the monitoring. Do not judge that there is something wrong with the machine 20.

According to this, the monitoring unit 12 does not determine that the slave unit 20 has a communication abnormality due to the battery exhaustion, and the notification unit 15 is suppressed from notifying the abnormality. By suppressing the notification of the abnormality by the notification unit 15, it is possible to suppress the consumption of the battery of the fire alarm 10. In this way, it is possible to prevent the battery consumption chain, specifically, the fire alarm 10 from being linked to the battery-depleted slave unit 20 to consume the battery.

Further, if the monitoring unit 12 cannot receive the radio wave from the slave unit 20 within a predetermined period from the time when the signal indicating that the battery is dead is received from the slave unit 20, the monitoring unit 12 determines that the slave unit 20 has an abnormality. You may.

According to this, for example, the slave unit 20 operates normally for a predetermined period (for example, one month) even after the battery of the slave unit is exhausted. It is possible to judge a communication abnormality that does not occur.

Further, the fire alarm 10 further stores the memory 17 that stores the address information of the slave unit 20 that has transmitted the signal indicating that the battery is exhausted among at least one slave unit 20 and the information that associates the information indicating that the battery is exhausted. When the monitoring unit 12 periodically performs the monitoring, the monitoring unit 12 collates the address information of the slave unit 20 that cannot receive the radio wave with the address information stored in the memory 17, and thereby at least one slave unit. It may be determined whether or not there is an abnormality in 20.

According to this, the monitoring unit 12 can determine whether or not the handset 20 that cannot receive the radio wave is the handset 20 that has transmitted the signal indicating that the battery is dead.

Further, the fire alarm 10 may further include an external output unit 14 that outputs information indicating an abnormality of at least one slave unit 20 to an external device.

According to this, even if the resident of the facility to which the fire alarm system 1 is applied is absent, the resident can confirm the abnormality of at least one slave unit 20 by an external device (mobile terminal or the like).

Further, when the external output unit 14 receives a signal indicating that the battery is dead from the slave unit 20 of at least one slave unit 20, the external output unit 14 informs the external device of information indicating that the slave unit 20 is dead. It may be output.

According to this, for example, even when the resident of the facility is absent, the resident can confirm that the battery of the slave unit 20 has run out by an external device (mobile terminal or the like).

Further, when the external output unit 14 cannot receive the radio wave from the slave unit 20 after receiving the signal indicating that the battery is dead from the slave unit 20 of at least one slave unit 20, the external output unit 14 informs the external device of the slave unit. Information indicating that 20 is in an inactive state may be output.

According to this, for example, even when the resident of the facility is absent, the resident can confirm that the battery of the slave unit 20 is completely exhausted by an external device (mobile terminal or the like).

Further, the fire alarm 10 may further include a notification unit 13 that transmits a signal indicating that the battery is dead to at least one slave unit 20 when the fire alarm 10 is out of battery. Then, at least one slave unit 20 has a monitoring unit 22 for determining whether or not there is an abnormality in the fire alarm 10 by periodically monitoring the fire alarm 10, and the monitoring unit 22 for the fire alarm 10. When it is determined that there is an abnormality, the notification unit 25 for notifying the abnormality may be provided. After receiving the signal indicating that the battery is dead from the fire alarm 10, the monitoring unit 22 determines that the fire alarm 10 has an abnormality in the monitoring even if the radio wave from the fire alarm 10 cannot be received. It does not have to be.

According to this, the monitoring unit 22 does not determine that the fire alarm 10 has a communication abnormality due to the battery exhaustion, and the notification unit 25 is suppressed from notifying the abnormality. By suppressing the notification unit 25 from notifying the abnormality, it is possible to suppress the consumption of the battery of the slave unit 20. In this way, it is possible to prevent the chain of battery consumption, specifically, the slave unit 20 from being linked to the fire alarm 10 that has run out of battery to consume the battery.

Further, if the monitoring unit 22 cannot receive the radio wave from the fire alarm 10 within a predetermined period from the time when the signal indicating that the battery is dead is received from the fire alarm 10, the fire alarm 10 is said to have an abnormality. You may judge.

According to this, for example, since the fire alarm 10 operates normally for a predetermined period (for example, one month) even after the battery has run out, the battery has run out within the predetermined period after the battery of the fire alarm 10 has run out. It is possible to determine communication abnormalities that are not the cause.

Further, at least one slave unit 20 may further include an external output unit 24 that outputs information indicating an abnormality of the fire alarm 10 to an external device.

According to this, even if the resident of the facility to which the fire alarm system 1 is applied is absent, the resident can confirm the abnormality of the fire alarm 10 by an external device (mobile terminal or the like).

Further, when the external output unit 24 receives a signal indicating that the battery is dead from the fire alarm 10, the external output unit 24 may output information indicating that the fire alarm 10 is dead to the external device.

According to this, for example, even when the resident of the facility is absent, the resident can confirm that the battery of the fire alarm 10 has run out by an external device (mobile terminal or the like).

Further, when the external output unit 24 cannot receive the radio wave from the fire alarm 10 after receiving the signal indicating that the battery is dead from the fire alarm 10, the external output unit 24 indicates to the external device that the fire alarm 10 is in an inoperable state. The indicated information may be output.

According to this, for example, even when the resident of the facility is absent, the resident can confirm that the battery of the fire alarm 10 is completely exhausted by an external device (mobile terminal or the like).

Further, at least one slave unit 20 is a plurality of slave units 20, and each of the plurality of slave units 20 further receives information from the other slave units 20 when the radio waves from the fire alarm 10 cannot be received. The slave unit information acquisition unit 29 to be acquired may be provided.

According to this, even if the fire alarm 10 is in a non-operating state, the detection information indicating the occurrence of a fire is shared among the plurality of slave units 20, and the plurality of slave units 20 can operate in conjunction with each other. can.

Further, the fire alarm system 1 according to the present embodiment includes a fire alarm 10 and at least one slave unit 20.

According to this, it is possible to provide a fire alarm system 1 capable of suppressing a chain of battery consumption.

(Other embodiments)
Although the fire alarm system 10 according to the embodiment has been described above, the present invention is not limited to the above embodiment.

For example, in the above embodiment, the monitoring unit 12 monitors at least one handset 20 periodically (for example, every 24 hours), but at least one handset 20 irregularly (for example, at random timing). May be monitored. Further, although the monitoring unit 22 periodically monitors the fire alarm 10, the fire alarm 10 may be monitored irregularly.

For example, in the above embodiment, if the monitoring unit 12 cannot receive the radio wave from the handset 20 within a predetermined period from the time when the handset 20 receives the signal indicating that the battery is dead, the monitoring unit 12 sends the handset 20 to the handset 20. Although it is determined that there is an abnormality, such processing may not be performed. That is, if the monitoring unit 12 cannot receive the radio wave from the slave unit 20 within a predetermined period from the time when the signal indicating that the battery is dead is received from the slave unit 20, the monitoring unit 12 determines that the slave unit 20 has no abnormality. May be good.

Further, for example, in the above embodiment, the memory 17 stores information in which the address information of the slave unit 20 that has transmitted the signal indicating that the battery is dead and the information indicating that the battery is exhausted are linked to the information indicating that the battery is dead. It was stored, but it does not have to be stored.

Further, for example, in the above embodiment, the fire alarm 10 is provided with the external output unit 14, but it may not be provided.

Further, for example, in the above embodiment, the fire alarm 10 is provided with the notification unit 13, but it may not be provided. That is, the slave unit 20 does not have to receive a signal indicating that the battery is dead from the fire alarm 10, and may not have a function of suppressing the chain of battery consumption.

Further, for example, in the above embodiment, at least one handset 20 is provided with the external output unit 24, but may not be provided.

Further, for example, in the above embodiment, at least one slave unit 20 includes the slave unit information acquisition unit 29, but it does not have to be provided.

Further, for example, in the above embodiment, at least one handset 20 is a plurality of handset 20, but it may be one.

Further, for example, the fire alarm 10 in the fire alarm system 1 may behave as a slave unit 20, and at least one of the slave units 20 may behave as a fire alarm 10.

Further, the present invention can be realized not only as a fire alarm 10 but also as an abnormality determination method including steps (processes) performed by each component constituting the fire alarm 10.

Specifically, the abnormality determination method is a fire alarm 10 that performs wireless communication with at least one slave unit 20 and at least one slave unit 20 and operates as a master unit for at least one slave unit 20. This is a method for determining communication abnormalities. As shown in FIG. 3, the abnormality determination method is a step of determining whether or not there is an abnormality in at least one slave unit 20 by periodically monitoring at least one slave unit 20 (step S11, step). S12), and when it is determined that there is an abnormality in at least one slave unit 20 in the determination step (Yes in step S12), the step of notifying the abnormality (step S13) is included. As shown in FIG. 4, in the determination step, after receiving a signal indicating that the battery is dead from any of the slave units 20 of at least one slave unit 20 in the monitoring (step S21), the slave unit is concerned. Even if the radio wave from 20 cannot be received (No in step S22), it is not determined that the slave unit 20 has an abnormality (step S23).

Further, the present invention can be realized not only as a fire alarm system 1 but also as a method including steps (processes) performed by each component constituting the fire alarm system 1.

For example, those steps may be performed by a computer (computer system). Then, the present invention can be realized as a program for causing a computer to execute the steps included in those methods. Further, the present invention can be realized as a non-temporary computer-readable recording medium such as a CD-ROM in which the program is recorded.

For example, when the present invention is realized by a program (software), each step is executed by executing the program using hardware resources such as a computer CPU, memory, and input / output circuit. .. That is, each step is executed by the CPU acquiring data from the memory or the input / output circuit or the like and performing an operation, or outputting the operation result to the memory or the input / output circuit or the like.

Further, each component included in the fire alarm 10 and the fire alarm system 1 of the above embodiment may be realized as a dedicated or general-purpose circuit.

Further, each component included in the fire alarm 10 and the fire alarm system 1 of the above embodiment may be realized as an LSI (Large Scale Integration) which is an integrated circuit (IC: Integrated Circuit).

Further, the integrated circuit is not limited to the LSI, and may be realized by a dedicated circuit or a general-purpose processor. A programmable FPGA (Field Programmable Gate Array) or a reconfigurable processor in which the connection and settings of circuit cells inside the LSI can be reconfigured may be utilized.

Furthermore, if an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology or another technology derived from it, it is natural that the technology will be used to integrate the components included in the fire alarm 10 and the fire alarm system 1. Circuitization may be performed.

In addition, a form obtained by applying various modifications to the embodiment that a person skilled in the art can think of, and a form realized by arbitrarily combining the components and functions in each embodiment within the range not deviating from the gist of the present invention. Is also included in the present invention.

1 Fire alarm system 10 Fire alarm 12 Monitoring unit (1st monitoring unit)
13, 23 Notification unit 14 External output unit (1st external output unit)
15 Notification unit (1st notification unit)
17 Memory (storage unit)
20 Slave unit 22 Monitoring unit (second monitoring unit)
24 External output unit (second external output unit)
25 Notification unit (second notification unit)
29 Slave unit information acquisition department

Claims (16)

A fire alarm that wirelessly communicates with at least one slave unit and operates as a master unit for the at least one slave unit.
A first monitoring unit that determines whether or not there is an abnormality in the at least one slave unit by monitoring the at least one slave unit periodically or irregularly.
When the first monitoring unit determines that there is an abnormality in the at least one slave unit, the first monitoring unit is provided with a first notification unit for notifying the abnormality.
After receiving a signal indicating that the battery is dead from any one of the at least one slave units, the first monitoring unit may not be able to receive radio waves from the slave unit in the monitoring. Do not judge that there is something wrong with the machine,
Fire alarm. If the first monitoring unit cannot receive the radio wave from the slave unit within a predetermined period from the time when the signal indicating that the battery is dead is received from the slave unit, the first monitoring unit determines that the slave unit has an abnormality.
The fire alarm according to claim 1. The fire alarm further includes a storage unit for storing information associated with the address information of the slave unit that has transmitted the signal indicating that the battery is dead and the information indicating that the battery is dead.
When the first monitoring unit performs the monitoring, the address information of the handset that cannot receive radio waves and the address information stored in the storage unit are collated, so that the at least one handset has an abnormality. Judge whether or not
The fire alarm according to claim 1 or 2. The fire alarm further includes a first external output unit that outputs information indicating an abnormality of the at least one slave unit to an external device.
The fire alarm according to any one of claims 1 to 3. When the first external output unit receives a signal indicating that the battery is dead from any one of the at least one slave units, the first external output unit outputs information indicating that the slave unit is dead to the external device. do,
The fire alarm according to claim 4. When the first external output unit cannot receive radio waves from the slave unit after receiving a signal indicating that the battery is dead from any of the slave units of the at least one slave unit, the slave unit is connected to the external device. Outputs information indicating that it is in a non-operational state,
The fire alarm according to claim 4 or 5. The fire alarm further includes a notification unit that transmits a signal indicating that the battery is dead to the at least one slave unit when the fire alarm is out of battery.
The fire alarm according to any one of claims 1 to 6. The at least one handset is
A second monitoring unit that determines whether or not there is an abnormality in the fire alarm by monitoring the fire alarm on a regular or irregular basis.
When the second monitoring unit determines that there is an abnormality in the fire alarm, the second monitoring unit is provided with a second notification unit for notifying the abnormality.
After receiving the signal indicating that the battery is dead from the fire alarm, the second monitoring unit determines that the fire alarm has an abnormality in the monitoring even if the radio wave from the fire alarm cannot be received. Don't judge,
The fire alarm according to claim 7. If the second monitoring unit cannot receive the radio wave from the fire alarm within a predetermined period from the time when the signal indicating that the battery is dead is received from the fire alarm, the second monitoring unit determines that the fire alarm has an abnormality. to decide,
The fire alarm according to claim 8. The at least one slave unit further includes a second external output unit that outputs information indicating an abnormality of the fire alarm to an external device.
The fire alarm according to claim 8 or 9. When the second external output unit receives a signal indicating that the battery is dead from the fire alarm, the second external output unit outputs information indicating that the fire alarm is dead to the external device.
The fire alarm according to claim 10. When the second external output unit cannot receive the radio wave from the fire alarm after receiving the signal indicating that the battery is dead from the fire alarm, the fire alarm is in an inoperable state in the external device. Outputs information indicating
The fire alarm according to claim 10 or 11. The at least one slave unit is a plurality of slave units.
Each of the plurality of slave units further includes a slave unit information acquisition unit that acquires information from another slave unit when the radio wave from the fire alarm cannot be received.
The fire alarm according to any one of claims 8 to 12. The fire alarm according to any one of claims 1 to 13 and the fire alarm.
The at least one slave unit and the like.
Fire alarm system. It is an abnormality determination method for determining an abnormality in communication between at least one slave unit and a fire alarm that operates as a master unit for the at least one slave unit by performing wireless communication with the at least one slave unit. ,
A step of determining whether or not there is an abnormality in the at least one slave unit by monitoring the at least one slave unit periodically or irregularly, and
In the step of determining the above, if it is determined that the at least one slave unit has an abnormality, the step of notifying the abnormality is included.
In the determination step, after receiving a signal indicating that the battery is dead from any one of the at least one slave units in the monitoring, even if the radio waves from the slave unit cannot be received, the slave unit is concerned. Do not judge that there is something wrong with
Abnormality judgment method. A program that causes a computer to execute the abnormality determination method according to claim 15.

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