JP6779814B2 - Fire alarm system - Google Patents

Description

The present invention relates to a fire alarm system for notifying a fire.

The fire alarm detects heat, smoke, flame, etc. at the time of a fire, and notifies a person in the facility of the occurrence of a fire by an alarm or the like. A fire alarm device having an automatic fire extinguishing system is also known, and Patent Document 1 describes that when a fire is detected by a fire detector, fire extinguishing water is sprinkled by a sprinkler to perform initial fire extinguishing. There is.

JP-A-2015-84825

A fire may occur while the facility is unmanned, such as at night or on holidays. In this case, even if the alarm sound is output, the person cannot notice the alarm. For this reason, there is a problem that the report to the fire department is delayed.

Therefore, the present invention has been made in view of these points, and a fire alarm system capable of shortening the time required to notify the fire department when a fire breaks out while the facility is unmanned is provided. The purpose is to provide.

The fire alarm system of the present invention is arranged in different rooms in a facility, and a fire position identification that identifies a fire position based on a plurality of fire detectors that detect a fire and the detection results of the plurality of fire detectors. When a unit, a detection unit that detects whether or not there is a person in the facility, and at least one of the plurality of fire detectors detect a fire, and the detection unit detects that there is no person. Is provided with a display device that displays information indicating the position of the fire.

The fire alarm system further includes an illuminance sensor that detects the ambient brightness of the display device, and when the display device detects that the ambient brightness is equal to or less than a predetermined value, the display device said. Information indicating the location of the fire may be displayed.

The display device may alternately display an image including information indicating the position of the fire and an image different from the image.

The display device may display information indicating the spread status of the fire based on the detection results of the plurality of fire detectors.

A plurality of cameras arranged in different rooms in the facility are further provided, and the display device may display an image taken by a camera arranged in the same room as the position of the fire among the plurality of cameras. Good.

When at least one of the plurality of fire detectors detects a fire, the position of the display device is indicated at a position in the facility facing a window formed on an outer wall surface of the facility. It may further have a direction changing unit that changes the direction in which information is displayed.

According to the present invention, when a fire breaks out while the facility is unmanned, it is possible to shorten the time required to notify the fire department.

It is a figure which shows the structure of the fire alarm system of 1st Embodiment. It is a figure which shows the structure of the fire alarm system. It is a figure which shows an example of the alarm image projected by a projector. It is a flowchart explaining an example of operation of a receiver. It is a sequence diagram which shows an example of the operation of a fire alarm system. It is a sequence diagram which shows an example of the operation of a fire alarm system.

<First Embodiment>
FIG. 1 is a diagram showing a configuration of a fire alarm system 100 according to the present embodiment. The fire alarm system 100 detects the occurrence of a fire. Further, when the fire alarm system 100 detects the occurrence of a fire in an unmanned state where the inside of the facility is unmanned, the fire alarm system 100 notifies the occurrence of a fire so that a third party passing outside the facility can detect the occurrence of the fire. The alarm image for the purpose is displayed on the display device.

In the example of FIG. 1, the fire alarm system 100 projects a message indicating the occurrence of a fire and the position of the fire on the screen by the projector 1 for projecting the alarm image on the screen. A third party passing outside the facility visually recognizes the message projected on the screen through the window of the facility to detect the outbreak of a fire. By notifying a third party passing outside the facility of the outbreak of a fire, it can be expected that a third party passing outside the facility will notify the fire department of the outbreak of the fire.

FIG. 2 is a diagram showing the configuration of the fire alarm system 100. The fire alarm system 100 includes a projector 1, a fire detector 2, a terminal circuit 3, a speaker 4, an entrance / exit device 5, an illuminance sensor 6, and a receiver 7. The fire alarm system 100 has one or more fire detectors 2 and a terminating circuit 3 for each area to be detected. Areas correspond to partitioned rooms within the facility, but an area may include multiple rooms.

The fire detector 2 is a sensor that detects the occurrence of a fire in the area, and detects the occurrence of a fire by detecting, for example, heat, smoke, or flame. The termination circuit 3 is a termination portion of a circuit to which the receiver 7 is connected.

The projector 1 constitutes a display device for displaying the image generated by the receiver 7, and projects the image on the screen. The projector 1 is a front projection type projector that projects an image from the front of the screen. In addition, in order to make equipment such as the projector 1 inconspicuous from the perspective of a third party passing outside the facility during normal times when there is no fire, a back projection type projector that projects an image from the back of the screen is used. It may be adopted. Further, the projector 1 may be embedded in a wall or a ceiling.

The speaker 4 is a speaker for broadcasting arranged in the facility. It is preferable that the speaker 4 outputs audio at a relatively loud volume so that a third party passing outside the facility can hear the broadcast content.

The entry / exit device 5 is a security management device that manages entry / exit of each room of the facility with an electric lock. In this facility, in order to ensure security during the unattended state of the facility, the final evacuee of the facility locks each doorway of the entire facility by holding a card key over an authentication device (not shown). The entry / exit device 5 records and retains the locking operation by the final exiter as the locking status of the entire facility.

The illuminance sensor 6 detects the brightness around the projector 1. The illuminance sensor 6 compares the detected ambient brightness of the projector 1 with a predetermined value. This predetermined value is a lower limit of the ambient brightness that allows the image projected by the projector 1 to be identified from outside the facility. The illuminance sensor 6 transmits the comparison result of the ambient brightness of the projector 1 to the receiver 7.

The receiver 7 is electrically connected to one or more fire detectors 2, and detects the occurrence of a fire in the facility by monitoring the detection signal from the fire detector 2. The receiver 7 includes a district circuit 71 (71-1 to 71-n, n is a natural number), an operation unit 72, a communication unit 73, a control unit 74, and a display unit 75. The district circuit 71 is provided for each area where the outbreak of a fire is detected. The district circuit 71 receives information that any one of the plurality of fire detectors 2 installed in the corresponding area has detected the occurrence of a fire. When the district circuit 71 receives a fire response signal indicating the occurrence of a fire from the fire detector 2 installed in the corresponding area, the district circuit 71 notifies the control unit 74 of the fire response signal.

The operation unit 72 is an operation device for the user to make various settings. The operation unit 72 is composed of, for example, a switch, a button, or a touch panel. The communication unit 73 is a communication module for transmitting and receiving various information between the projector 1, the speaker 4, the room entry / exit device 5, and the illuminance sensor 6 via a communication network such as a LAN (Local Area Network) or a wireless LAN. ..

The control unit 74 has, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). By executing the program stored in the ROM, the CPU functions as a fire position specifying unit 741, a detection unit 742, an image generation unit 743, and a communication control unit 744.

The fire position specifying unit 741 identifies the position of the fire and the diffusion state based on the detection results of the plurality of fire detectors 2. More specifically, the fire position identification unit 741 stores the room ID for identifying the room in which each fire detector 2 is arranged in association with the fire detector ID for identifying the fire detector 2. There is. The fire position identification unit 741 identifies the position of the fire by reading the room ID of the room in which the fire detector 2 that has detected the fire is arranged from the ROM. Further, when a fire is detected by a plurality of fire detectors 2, the fire position specifying unit 741 reads the room ID of the room in which the fire detectors 2 that have detected the fire are arranged from the ROM, thereby causing a fire. Identify the spread situation. The fire position identification unit 741 generates position identification information for the inside of the facility for displaying the occurrence of a fire and the position of the fire on the receiver 7, and inputs the position identification information to the display unit 75. In addition, the fire position specifying unit 741 generates an alarm sound for broadcasting the occurrence of a fire and the position of the fire in the facility, and inputs the alarm sound to the communication control unit 744.

The detection unit 742 detects whether or not there is a person in the facility by acquiring the locked status of the entire facility from the room entry / exit device 5 via the communication unit 73. Specifically, if the final evacuator has performed an operation to lock each doorway of the entire facility, it is determined that the facility is unmanned. On the other hand, if the final evacuator has not locked each doorway of the entire facility, it is determined that the facility is in a manned state with people. The detection unit 742 inputs the detection result of whether or not there is a person in the facility to the image generation unit 743.

When the detection unit 742 determines that the facility is unmanned, the image generation unit 743 generates an alarm image for notifying a third party passing outside the facility of the occurrence of a fire. The operation of the image generation unit 743 will be described with reference to FIG. 3A and 3B are diagrams showing an example of an alarm image projected by the projector 1. The projector 1 can alternately project a plurality of different warning images, and for example, the warning images shown in FIGS. 3A and 3B are alternately projected at regular intervals.

As shown in the upper part of FIG. 3A, the image generation unit 743 includes information indicating that a fire has occurred in the alarm image. Further, the image generation unit 743 acquires the position of the fire from the fire position specifying unit 741 and includes the acquired information indicating the position of the fire in the alarm image as shown in the lower part of FIG. 3A.

In addition, as shown in the upper part of FIG. 3B, the image generation unit 743 includes a message prompting a report to the fire engine in the alarm image. Further, as shown in the middle part of FIG. 3B, the image generation unit 743 includes information necessary for reporting to the fire engine, for example, the address of the facility where the fire occurred in the alarm image. As shown in the lower part of FIG. 3B, the image generation unit 743 includes a message urging evacuation from the vicinity of the facility in the alarm image.

Returning to the description of FIG. The image generation unit 743 may acquire the fire diffusion status from the fire position identification unit 741 and include information indicating the fire diffusion status in the alarm image. By projecting an image showing the spread state of the fire on the screen by the projector 1, it is possible to more strongly urge a third party passing outside the facility to notify the fire department.

If the fire detector 2 detects a fire while the inside of the facility is unmanned, the third party outside the facility is expected to be notified of the fire by a third party passing outside the facility. It is desirable to notify the outbreak of a fire. However, the image projected on the screen by the projector 1 is usually difficult to identify in a bright environment.

Therefore, the image generation unit 743 acquires the comparison result of the ambient brightness of the projector 1 in the illuminance sensor 6, and (1) the ambient brightness detected by the illuminance sensor 6 is equal to or less than a predetermined value, and (2). When at least one of the plurality of fire detectors 2 detects a fire and (3) the detection unit 742 detects that the inside of the facility is unmanned, an alarm image is generated. On the other hand, when the image generation unit 743 detects that the brightness exceeds a predetermined value by the illuminance sensor 6, none of the plurality of fire detectors 2 detects a fire, or the detection unit 742 is manned in the facility. When it is detected that it is in a state, an alarm image is not generated.

The communication control unit 744 transmits and receives various data to and from the projector 1, the speaker 4, the room entry / exit device 5, and the illuminance sensor 6 via the communication unit 73. The communication control unit 744 transmits the alarm sound generated by the fire position specifying unit 741 to the speaker 4, and causes the speaker 4 to output the alarm sound. Further, the communication control unit 744 transmits the alarm image generated by the image generation unit 743 to the projector 1, and causes the projector 1 to project the alarm image on the screen. The display unit 75 is a display for displaying the information generated by the control unit 74. The display unit 75 displays information for confirmation by a person in the facility, and displays, for example, position identification information indicating the occurrence of a fire generated by the fire position identification unit 741 and the position of the fire.

FIG. 4 is a flowchart illustrating an example of the operation of the receiver 7. This processing procedure is started when any one of the plurality of fire detectors 2 detects a fire. First, the fire position specifying unit 741 causes the display unit 75 of the receiver 7 to display the occurrence of the fire and the position of the fire (S1).
The image generation unit 743 determines whether or not the comparison result of the ambient brightness of the projector 1 by the illuminance sensor 6 indicates a low illuminance state (S2). When the detection unit 742 determines that the brightness around the projector 1 is equal to or less than a predetermined value (YES in S2), the detection unit 742 obtains the locking status of the entire facility from the entry / exit device 5, so that a person can enter the facility. Whether or not it is detected (S3). The detection unit 742 notifies the image generation unit 743 of the detection result.

When the communication control unit 744 detects that the inside of the facility is unmanned in the detection unit 742 (YES in S3), the communication control unit 744 transmits a start signal to the projector 1 via the wireless LAN and starts the start process to the projector 1. (S4). The activation process is, for example, a process in which the projector 1 shifts from a standby state in which power consumption is low to a normal state in which power consumption is higher and an image can be projected on a screen.

Further, the projector 1 receives an alarm image including information indicating that a fire has occurred and an alarm image including information indicating the position of the fire from the communication control unit 744 by wireless LAN, and determines these alarm images. It is switched every period and alternately projected on the screen (S5).

Further, the speaker 4 outputs the alarm voice received from the communication control unit 744 in the facility (S6). Next, the communication control unit 744 determines whether or not the operation unit 72 has accepted the restoration operation of the facility personnel instructing the stop of projection of the alarm image and the stop of output of the alarm sound (S7). This restoration operation is performed, for example, when a person involved in the facility arrives at the facility for reasons such as detecting the occurrence of a fire.

When the operation unit 72 accepts the recovery operation of the facility personnel (YES in S7), the communication control unit 744 transmits an alarm sound output stop signal to the speaker 4, and the speaker 4 outputs the alarm sound. Stop (S8). Further, the communication control unit 744 transmits a display stop signal of the alarm image to the projector 1, and the projector 1 stops the projection of the alarm image in response to the received display stop signal and ends the process (S8). ..

In the determination of step S1, when the speaker 4 determines that the ambient brightness detected by the illuminance sensor 6 exceeds a predetermined value (NO in S2), the speaker 4 voices the alarm voice received from the communication control unit 744 in the facility. Output and end the process (S9). Further, in the determination in step S3, when the detection unit 742 detects that the inside of the facility is in a manned state (NO in S3), the speaker 4 outputs an alarm voice received from the communication control unit 744 in the facility. , End the process (S9). Further, in the determination in step S7, if the communication control unit 744 does not accept the restoration operation of the facility-related person (NO in S7), the processing procedure in steps S5 to S6 is repeated.

FIG. 5 is a sequence diagram showing an example of the operation of the fire alarm system 100, and shows an example of the operation of the fire alarm system 100 when the inside of the facility is in a manned state in the daytime when the surroundings of the projector 1 are bright. For example, this processing procedure starts when the fire detector 2 and the receiver 7 start monitoring the fire.

The communication control unit 744 of the receiver 7 transmits a state request signal requesting a fire detection result to each fire detector 2 at regular intervals. Each fire detector 2 responds to the status request signal from the communication control unit 744 and transmits a normal response signal indicating that no fire has been detected to the receiver 7. After that, when one fire detector 2 detects a fire, the fire detector 2 that has detected the fire receives a fire response signal indicating the occurrence of a fire in response to a status request signal from the communication control unit 744. Send to machine 7.

The communication control unit 744 requests the illuminance sensor 6 to compare the brightness of the surroundings of the projector 1 when the fire position identification unit 741 receives a fire response signal from one fire detector 2. Send a signal. The illuminance sensor 6 detects the ambient brightness of the projector 1 in response to the illuminance state request signal. The illuminance sensor 6 compares the detected brightness with a predetermined value, and detects that the ambient brightness of the projector 1 exceeds the predetermined value. In this case, the illuminance sensor 6 transmits a high illuminance state signal indicating that the illuminance is high to the receiver 7.

The communication control unit 744 receives the high illuminance signal from the illuminance sensor 6 and determines that the projector 1 is not suitable for use because the ambient brightness of the projector 1 exceeds a predetermined value. In addition, the communication control unit 744 transmits a security status request signal requesting information indicating the locking status of the entire facility to the entry / exit device 5. In response to the security status request signal, the entry / exit device 5 transmits a manned status signal indicating that the inside of the facility is manned as information indicating the locking status of the entire facility. The communication control unit 744 of the receiver 7 receives the manned status signal from the entry / exit device 5. In this case, since the facility is manned, the communication control unit 744 of the receiver 7 ends the process without projecting the alarm image by the projector 1.

FIG. 6 is a sequence diagram showing an example of the operation of the fire alarm system 100, and shows an example of the operation of the fire alarm system 100 when the inside of the facility is unmanned at night when the surroundings of the projector 1 are dark. Similar to the processing procedure of FIG. 5, this processing procedure starts, for example, when the fire detector 2 and the receiver 7 start monitoring the fire.

The communication control unit 744 of the receiver 7 transmits a state request signal requesting a fire detection result to each fire detector 2 at regular intervals. When one fire detector 2 detects a fire, the fire detector 2 that detects the fire responds to the status request signal from the communication control unit 744 and receives a fire response signal indicating that a fire has occurred. Send to.

When the communication control unit 744 receives the fire response signal from one fire detector 2, it transmits an illuminance state request signal requesting the detection result of the ambient brightness of the projector 1 to the illuminance sensor 6. The illuminance sensor 6 detects the ambient brightness of the projector 1 in response to the illuminance state request signal. The illuminance sensor 6 compares the detected brightness with a predetermined value, and detects that the ambient brightness of the projector 1 is equal to or less than a predetermined value. In this case, the illuminance sensor 6 transmits a low illuminance state signal indicating that the illuminance is low to the receiver 7.

The communication control unit 744 receives the low illuminance signal from the illuminance sensor 6 and determines that the projector 1 is suitable for use because the ambient brightness of the projector 1 is equal to or less than a predetermined value. In addition, the communication control unit 744 transmits a security status request signal requesting information indicating the locking status of the entire facility to the entry / exit device 5. In response to the security status request signal, the entry / exit device 5 transmits an unmanned status signal indicating that the facility is unmanned as information indicating the locking status of the entire facility. The communication control unit 744 receives the unmanned state signal from the entry / exit device 5.

When the communication control unit 744 receives the fire response signal, the low illuminance signal, and the unmanned state signal, it transmits a start signal to the projector 1 and causes the projector 1 to start the start process. In addition, the image generation unit 743 of the receiver 7 generates an alarm image including information indicating that a fire has occurred and an alarm image including information indicating the position of the fire, respectively. The communication control unit 744 transmits to the projector 1 an alarm display request signal requesting the projection of the alarm image together with the plurality of types of alarm images generated by the image generation unit 743. In response to the alarm display request signal, the projector 1 alternately projects a plurality of types of received alarm images on the screen at predetermined intervals.

After the projection of the alarm image is started, the projector 1 transmits an alarm display completion signal indicating that the projection of the alarm image is completed to the receiver 7. After that, the communication control unit 744 repeatedly transmits the alarm display request signal to the projector 1, and the projector 1 receives the alarm display request signal, continues to project the alarm image on the screen, and receives the alarm display completion signal. Send to machine 7.

When the operation unit 72 receives a recovery operation of a facility-related person instructing to stop the projection of the alarm image and stop the output of the alarm sound, the communication control unit 744 transmits a display stop signal of the alarm image to the projector 1. .. The projector 1 stops the projection of the alarm image in response to the received display stop signal. Further, the projector 1 transmits an alarm stop completion signal indicating that the projection of the alarm image has been stopped to the receiver 7, and the communication control unit 744 receives the alarm stop completion signal.

According to the present embodiment, when the detection unit 742 detects that the inside of the facility is unmanned, the projector 1 expects that a third party passing outside the facility will notify the fire department. Project information indicating the location of the fire. Therefore, it is possible to shorten the time required for reporting to the fire department. Furthermore, by projecting information indicating the location of the fire, it is possible to promote fire extinguishing activities by the fire department.

Further, when the illuminance sensor 6 detects that the ambient brightness is equal to or less than a predetermined value, the projector 1 projects information indicating the position of the fire. Therefore, it is possible to prevent the image projected by the projector 1 from becoming indistinguishable due to the bright surroundings of the projector 1.

Further, the projector 1 alternately projects an image including information indicating the position of the fire and an image different from the image. Therefore, it is possible to attract the attention of a third party passing outside the facility by switching the images.

<Second embodiment>
In the first embodiment, the configuration in which the projector 1 projects an alarm image including information indicating the position of the fire on the screen has been described. On the other hand, in the present embodiment, an example will be described in which the projector 1 projects an image taken by a camera arranged in the same room as the position of the fire specified by the fire position specifying unit 741.

The fire alarm system 100 of the second embodiment further includes a plurality of cameras (not shown). Each of the plurality of cameras uses an optical element to generate a captured image of the subject. The plurality of cameras are arranged in different rooms in the facility, for example, all rooms. Each camera transmits the generated captured image to the receiver 7 via a wireless LAN or the like. The communication control unit 744 receives the captured image generated by each camera, and the image generation unit 743 is the same as the position of the fire specified by the fire position specifying unit 741 among the captured images received by the communication control unit 744. Generates an alarm image that includes an image taken by a camera placed in the room.

According to such a configuration, the projector 1 projects an image taken by a camera arranged in the same room as the position of the fire on the screen. A third party passing outside the facility can expect the third party to report to the fire extinguishing organization in order to grasp the situation of the fire in more detail.

<Third embodiment>
In the first and second embodiments, an example in which the orientation of the projector 1 is fixed has been described. On the other hand, in the present embodiment, an example in which the orientation of the projector 1 can be changed will be described.

The fire alarm system 100 of the present embodiment further includes a direction changing unit that changes the direction of the projector 1. When the warning image is projected by the projector 1, the direction changing unit changes the orientation of the projector 1 so that the image is projected at a position where the warning image can be easily seen by a third party passing outside the facility. For example, when at least one of the plurality of fire detectors 2 detects a fire, the direction changing unit sets the direction of the projector 1 at a position in the facility facing the window formed on the outer wall surface of the facility. Change the direction to project the information indicating the position of.

The direction changing unit includes a camera for determining the rotation angle of the projector 1, and by recognizing a window formed on the outer wall surface of the facility in the image taken by the camera by a known image recognition technique, for example. , Identify the screen or wall facing the window in the facility. Alternatively, the direction changing unit may specify a screen or wall surface outside the facility where the image can be projected through the window, and change the orientation of the projector 1 so that the image is projected on the specified screen or wall surface.

The communication control unit 744 may store the direction in which the projector 1 can project an image at a position visible from the outside. When transmitting the activation signal to the projector 1, the communication control unit 744 transmits information for designating the direction in which the image can be projected to a position visible from the outside to the direction changing unit, and the direction changing unit uses the information for specifying the direction. The projection direction may be changed based on the above.

By adopting such a configuration, when the facility personnel change the orientation of the projector 1 due to reasons such as using the projector 1 for other purposes, the fire alarm system 100 has a direction changing portion of the projector 1. By changing the orientation, the image can be projected at a position where the alarm image can be easily seen by a third party passing outside the facility.

In the first to third embodiments, an example in which the projector 1 projects an alarm image when the illuminance sensor 6 detects that the ambient brightness of the projector 1 is equal to or less than a predetermined value has been described. However, the present invention is not limited to this. For example, if the display device displays the alarm image with sufficient brightness, a third party passing outside the facility can visually recognize the alarm image regardless of the brightness around the display device. Therefore, when at least one of the plurality of fire detectors 2 detects a fire and the detection unit 742 detects that there is no person, the display device causes a fire regardless of the ambient brightness. It may be configured to display an alarm image indicating the position.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes can be made within the scope of the gist. is there. For example, the specific embodiment of the distribution / integration of the device is not limited to the above embodiment, and all or a part thereof may be functionally or physically distributed / integrated in an arbitrary unit. Can be done. Also included in the embodiments of the present invention are new embodiments resulting from any combination of the plurality of embodiments. The effect of the new embodiment produced by the combination has the effect of the original embodiment together.

1 Projector 2 Fire detector 3 Termination circuit 4 Speaker 5 Entrance / exit device 6 Illuminance sensor 7 Receiver 71 District circuit 72 Operation unit 73 Communication unit 74 Control unit 741 Fire position identification unit 742 Detection unit 743 Image generation unit 744 Communication control unit 100 Fire alarm system

Claims (5)

Multiple fire detectors located in different rooms within the facility to detect fires,
A fire position identification unit that identifies the position of a fire based on the detection results of the plurality of fire detectors,
A detector that detects whether or not there is a person in the facility,
A display device that displays information indicating the position of the fire when at least one of the plurality of fire detectors detects a fire and the detection unit detects that there is no person.
When at least one of the plurality of fire detectors detects a fire, the position of the display device is indicated at a position in the facility facing a window formed on the outer wall surface of the facility. The direction change part that changes the direction to display information, and
A fire alarm system equipped with. An illuminance sensor for detecting the brightness around the display device is further provided.
When the illuminance sensor detects that the ambient brightness is equal to or less than a predetermined value, the display device displays information indicating the position of the fire.
The fire alarm system according to claim 1. The display device alternately displays an image including information indicating the position of the fire and an image different from the image.
The fire alarm system according to claim 1 or 2. The display device displays information indicating the spread status of the fire based on the detection results of the plurality of fire detectors.
The fire alarm system according to any one of claims 1 to 3. Further equipped with multiple cameras located in different rooms within the facility
The display device displays an image taken by a camera arranged in the same room as the position of the fire among the plurality of cameras.
The fire alarm system according to any one of claims 1 to 4.

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