JP2010108435A - Fire sensing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire sensing system for performing an appropriate fire determination, considering a change in a detecting environment given by a predetermined device, and extensively announcing occurrence of fire even when a fire sensor not connected to a disaster-preventing receiver detects the occurrence of fire. <P>SOLUTION: The fire sensing system 1 includes; a fire sensor 10 which detects a fire-resulted phenomenon which occurs resulting from a fire; an environmental change device 20 which changes the detecting environment of the fire sensor 10; a determination part 31b which determines presence/absence of fire occurrence based on a detection output of the fire sensor 10 and a predetermined detection reference; and a determination control part 31a which controls at least one of the determination part 31b and the environmental change device 20 according to operation of at least one of the determination part 31b and the environmental change device 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fire detection system.

  Conventionally, a fire detection system for detecting the occurrence of a fire has been used. For example, fire detectors that detect fire-induced phenomena such as smoke, heat, flames, etc. caused by a fire, and signals from these fire detectors that receive fire alarm output There is a fire detection system in which a disaster prevention receiver is connected via a transmission line.

  In such a fire detection system, a sensor using various operating principles is used as a fire detector. For example, smoke detectors that detect smoke generated by a fire, heat detectors that detect heat from a fire, flame detectors that detect infrared and ultraviolet rays generated from a fire flame, etc. are used as fire detectors. ing.

  For example, a scattered light type smoke detector includes a light emitting unit that emits light to a smoke detection space shielded from the outside, and a light receiving unit that detects light scattered by smoke that has flowed into the smoke detection space. When light having an intensity exceeding a predetermined standard is detected, it is determined that smoke due to fire is sensed (see, for example, Patent Document 1).

  In addition, the constant temperature type heat detector performs fire detection based on the temperature in the monitoring region, and for example, one using a thermistor or one using a bimetal has been proposed. For example, a thermistor-based constant temperature type heat sensor uses the thermistor characteristic that changes its resistance value according to the temperature. The temperature of the monitoring area is measured based on the resistance value of the thermistor, and this temperature is set to a predetermined value. When the temperature is higher than the temperature, it is determined that a fire has occurred in the monitoring area (see, for example, Patent Document 2).

  In addition, the infrared flame detector detects infrared rays contained in the light generated from the flame, and the infrared rays from the flame flicker at a specific frequency different from the infrared rays emitted from artificial lighting and high-temperature objects, Infrared light from the flame uses a point having a high spectral intensity near a specific wavelength radiated from carbon dioxide (CO2), and distinguishes fire from other high-temperature objects to detect flame (for example, Patent Document 3). reference).

  In the fire detection system using these fire detectors, in order to prevent fire notification in response to phenomena not caused by fire (for example, steam, cigarette smoke, lighter flame, etc.) Some fire alarms are issued only when the preset accumulation time continues for a condition exceeding the standard, or the detection standard is dynamically set according to the rise in the detection signal of the fire detector. Yes (see, for example, Patent Document 4).

Japanese Patent Laying-Open No. 2005-352932 (paragraphs 0015 and 0016) JP 2001-143170 A (paragraph 0017) JP 2003-227751 A (paragraph 0015) Japanese Patent Laying-Open No. 2005-4408 (paragraphs 0023 to 0025)

  Incidentally, an air conditioner, a stove, or the like may be installed in a monitoring area where the fire detection system monitors whether a fire has occurred. When these air conditioners and stoves operate, the detection environment of the fire detector changes, such as changes in the air flow around the smoke detector, changes in the room temperature, and flames caused by the stove. There is a case. However, since the conventional fire detection systems as described above do not take these changes into consideration, smoke is diffused by the flow of air or the temperature rise rate in the room is suppressed with the operation of equipment such as an air conditioner and a stove. In some cases, it may be difficult to detect a fire immediately after the fire.

  In addition, if a fire detector that is not connected to a disaster prevention receiver via a transmission line (for example, a fire detector mounted on a stand-alone fire extinguishing robot or a home alarm device) detects the occurrence of a fire, Since it is not possible to send an alarm signal from a fire detector to a disaster prevention receiver, it is not possible to output an alarm or a message via the disaster prevention receiver, and it is difficult to report the occurrence of a fire over a wide area. There was a possibility.

  The present invention has been made in view of the above, and can perform an appropriate fire determination in consideration of a change that a predetermined device gives to a detection environment, and a fire detector that is not connected to a disaster prevention receiver is provided. An object of the present invention is to provide a fire detection system capable of notifying the occurrence of a fire in a wide range even when the occurrence of a fire is detected.

  In order to solve the above-described problems and achieve the object, the fire detection system according to claim 1 is changed to a detection means for detecting a fire-caused phenomenon caused by a fire and a detection environment of the detection means. Depending on the operation of at least one of the determination means or the environment change means, the determination means for determining the presence or absence of fire based on the detection output of the detection means and a predetermined detection criterion, And a control unit that controls at least one of the determination unit and the environment change unit.

  The fire detection system according to claim 2 is characterized in that, in the fire detection system according to claim 1, the control means changes the detection reference according to the operation of the environment changing means.

  Further, the fire detection system according to claim 3 is the fire detection system according to claim 1 or 2, wherein the control unit is configured to detect the environment of the plurality of detection units that detect the fire-induced phenomena different from each other. The priority is set according to the operation of the changing means, and the determination means determines whether or not a fire has occurred based on the detection output of the detection means, the detection criterion, and the priority.

  Moreover, the fire detection system according to claim 4 is the fire detection system according to any one of claims 1 to 3, wherein the control means determines that the fire is occurring. In the case, the fire-induced phenomenon is generated in a pseudo manner from the environment changing means.

  According to the first aspect of the present invention, at least the determination means for determining the presence or absence of a fire based on the detection output of the detection means for detecting a fire-caused phenomenon, or the environment changing means for changing the detection environment of the detection means Since at least one of these determination means and environment changing means is controlled according to one operation, the determination means can make an appropriate fire determination in consideration of the change that the environment changing means gives to the detection environment. In addition, when the determination means is not connected to the disaster prevention receiver, the environment changing means changes the detection environment according to the determination result of the determination means, and the detection means is connected to the disaster prevention receiver. The occurrence of fire can be reported over a wide area.

  According to the second aspect of the present invention, since the detection reference is changed in accordance with the operation of the environment change means, the determination is made based on the detection reference corresponding to the change that the environment change means gives to the detection environment of the detection means. It is possible to make the means perform fire judgment with high accuracy.

  According to the third aspect of the present invention, since the determination unit determines whether or not a fire has occurred based on the priority set according to the operation of the environment change unit, the environment change unit detects the detection environment of the detection unit. The fire determination can be performed with priority given to the detection output of the detection means capable of reliably detecting the fire in accordance with the change applied to.

  According to the present invention as set forth in claim 4, when the determination means determines that a fire has occurred, a fire-induced phenomenon is generated in a pseudo manner from the environment change means. Even when the system is not connected to a disaster prevention receiver or the like, it is possible to notify the occurrence of a fire over a wide range via the detection means connected to the disaster prevention receiver.

  Hereinafter, embodiments of a fire detection system according to the present invention will be described in detail with reference to the accompanying drawings. [I] First, the basic concept common to each embodiment was explained, then [II] specific contents of each embodiment were sequentially explained, and finally [III] a modification to each embodiment. explain. However, the present invention is not limited to each embodiment.

[I] Basic concept common to the embodiments First, the basic concept common to the embodiments will be described. The fire detection system according to each embodiment is intended to detect a fire in a monitoring area.

  The installation target of the fire detection system according to each embodiment is arbitrary. For example, each room such as a kitchen, a bedroom, and a living room in a general house, a public facility such as a nursing home, a hospital, or a large building or factory. Can be installed in large buildings.

  One of the features of the fire detection system according to each embodiment is that the determination means for determining the presence or absence of a fire based on the detection output of the detection means for detecting a fire-induced phenomenon, or the detection environment of the detection means. It is to control at least one of the determination means or the environment change means in accordance with the operation of at least one of the environment change means that gives a change. Accordingly, it is possible to cause the determination unit to make an appropriate fire determination in consideration of a change that the environment change unit gives to the detection environment. In addition, when the determination means is not connected to the disaster prevention receiver, the environment changing means changes the detection environment according to the determination result of the determination means, and the detection means is connected to the disaster prevention receiver. The occurrence of fire can be reported over a wide area.

[II] Specific Contents of Each Embodiment Next, specific contents of each embodiment according to the present invention will be described.

[Embodiment 1]
First, the first embodiment will be described. In this form, the detection reference is changed according to the operation of the environment changing means, and priorities are set for a plurality of detecting means for detecting different fire-induced phenomena.

(Configuration of fire detection system)
First, the configuration of the fire detection system will be described. FIG. 1 is a functional block diagram showing the electrical configuration of the fire detection system. As shown in FIG. 1, the fire detection system 1 includes a fire detector 10, an environment change device 20, and a fire detection device 30.

(Fire detection system configuration-fire detector)
The fire detector 10 is detection means for detecting a fire-induced phenomenon that occurs due to a fire, and is connected to the fire detection device 30 via the transmission path 2 so as to be communicable. The specific configuration of the fire sensor 10 is arbitrary, and for example, a smoke sensor, a heat sensor, or a flame sensor can be used. In the first embodiment, a case where a smoke sensor 10a, a heat sensor 10b, and a flame sensor 10c are provided as the fire sensor 10 will be described.

(Fire detection system configuration-environmental change equipment)
The environment change device 20 is an environment change unit that changes the detection environment of the fire detector 10, and is connected to the fire detection device 30 via the network 3 so as to be communicable. The specific configuration of the environment change device 20 and what kind of fire detector 10 detection environment changes depending on the environment change device 20 are arbitrary. For example, among the fire detectors 10 described above, smoke detection is possible. Examples of the environment change device 20 that changes the detection environment of the heater 10a and the heat sensor 10b include an air conditioner, a stove, and a ventilation fan. Further, as the environment change device 20 that changes the detection environment of the flame detector 10c, a stove may be mentioned. In the first embodiment, a case where an air conditioner 20a and a stove 20b are provided as the environment change device 20 will be described.

(Configuration of fire detection system-Fire detection device)
The fire detection device 30 executes various processes according to the output from the fire detector 10 and the operation of the environment change device 20. As shown in FIG. 1, the fire detection device 30 includes a control unit 31, a communication unit 32, an operation unit 33, and a recording unit 34 in terms of functional concept.

  The control unit 31 is for controlling the operation of the fire detection device 30, and includes a determination control unit 31a and a determination unit 31b in terms of functional concept. The determination control unit 31a controls the determination unit 31b according to the operation of the environment change device 20, and corresponds to the control means in the claims. The determination unit 31b is a determination unit that determines whether or not a fire has occurred based on the detection output of the fire detector 10 and a predetermined detection criterion. Details of processing executed by each component of the control unit 31 will be described later.

  The specific configuration of the control unit 31 is arbitrary. For example, a control program such as an OS (Operating System), an embedded program that defines various processing procedures, an internal memory for storing required data, and A CPU (Central Processing Unit) that executes these programs is provided.

  The communication unit 32 is a communication unit for communicating information regarding fire detection between the fire detector 10 and the environment change device 20. The specific content of the information to be communicated is arbitrary. For example, the detection output signal can be received from the fire detector 10 or the operation information for specifying the operation of the environment change device 20 can be received. Further, a specific communication method is arbitrary, and for example, communication can be performed wirelessly or by wire.

  The operation unit 33 is an operation unit that receives an operation input from the user to the fire detection device 30. The specific configuration of the operation unit 33 is arbitrary, and known operation means such as a keyboard may be provided integrally with the fire detection device 30, or may be configured separately from the fire detection device 30 and via a network or the like. The fire detection device 30 and the operation unit 33 may be connected to each other.

  The recording unit 34 includes data necessary for various processes executed by the control unit 31, for example, a detection standard table that stores detection criteria used when the determination unit 31b performs determination, and a determination control unit 31a that controls the determination unit 31b. It is a recording means for recording a control table or the like to be referred to when performing. FIG. 2 is a table illustrating a detection reference table, and FIG. 3 is a table illustrating a control table.

  As illustrated in FIG. 2, the detection reference table includes “smoke”, “heat”, and “flame” as table items, and information corresponding to these is stored. The information stored corresponding to the item “smoke” is a detection standard for the detection output from the smoke detector 10a, and stores, for example, a standard dimming rate (“20% / m or more in FIG. 2). "). The information stored corresponding to the item “heat” is a detection reference for the detection output from the heat sensor 10b, and for example, a reference temperature is stored (“65 ° C. or higher” in FIG. 2). The information stored corresponding to the item “flame” is a detection reference for the detection output from the flame detector 10c, and for example, a reference output current value is stored (“5 mA or more” in FIG. 2).

  As illustrated in FIG. 3, the control table includes “environment change device”, “detection reference”, and “priority” as table items, and information corresponding to these items is stored in association with each other. The information stored corresponding to the item “environment change device” is information about the environment change device 20, and is specified by a name (such as a stove or an air conditioner in FIG. 3) that identifies the environment change device 20 and the name. The operation for each environmental change device 20 (in FIG. 3, “ON” and “OFF” for the stove 20b, “large air volume”, “cooling”, etc. for the air conditioner 20a) is stored. The information stored corresponding to the item “detection criterion” is information for specifying the amount of change when the determination control unit 31a changes the detection criterion. The type of the fire detector 10 (in FIG. 3, smoke, heat, For each flame, the amount of change (in FIG. 3, “+ 5% / m” for “smoke”, “+ 5 ° C.”, etc. for “heat”, “+1 mA” for “flame”, etc.) is stored. If “-” is stored, it means that the detection reference is not changed. The information stored corresponding to the item “priority” is information for specifying the priority to be referred to when the determination unit 31b performs determination, and a numerical value indicating the priority for each type of the fire detector 10 is stored. ("1" "2" "3" in FIG. 3). In the example shown in FIG. 3, the higher the numerical value, the higher the priority.

  The method and timing for recording each piece of information stored in the detection reference table and the control table in the recording unit 34 is arbitrary, and can be input via the operation unit 33 when the fire detection system 1 is installed, for example. The specific configuration of the recording unit 34 is arbitrary, and can be configured using a rewritable storage unit such as a flash memory, for example.

(Processing by fire detection system)
Next, processing executed by the fire detection system 1 configured as described above will be described. FIG. 4 is a flowchart showing a flow of processing executed by the fire detection system 1. The timing at which this process is activated is arbitrary, and is automatically activated after activation of the fire detection device 30, for example.

  After the activation of the fire detection device 30, the determination control unit 31a acquires operation information from the environment change device 20 via the communication unit 32 (step SA-1), and the environment change specified based on the acquired operation information. The change amount of the detection reference corresponding to the operation of the device 20 is acquired from the control table (step SA-2).

  Subsequently, the determination unit 31b acquires a detection output from the fire sensor 10 via the transmission path 2 (step SA-3). Then, the acquired detection output is compared with the detection criterion stored in the detection criterion table (step SA-4). At this time, the determination control unit 31a changes the detection reference used by the determination unit 31b for comparison in step SA-4 based on the change amount acquired in step SA-2.

  In the example shown in FIGS. 2 and 3, when the air volume of the air conditioner 20a is large, smoke is diffused by the wind, and the concentration of smoke detected by the smoke detector 10a may be lowered. Change by -10% / m. In this case, the detection criterion that the determination unit 31b compares with the detection output from the smoke detector 10a is 20% / m-10% / m = 10% / m.

  Further, when the air conditioner 20a is performing a cooling operation, the room is cooled, and the temperature detected by the heat sensor 10b may be lowered. Therefore, the detection reference is changed by −5 ° C. In this case, the detection criterion that the determination unit 31b compares with the detection output from the heat sensor 10b is 65 ° C.−5 ° C. = 60 ° C.

  Further, when the stove 20b is ON, smoke or steam is generated by cooking, and the smoke concentration detected by the smoke detector 10a may increase, or the indoor temperature rises and is detected by the heat detector 10b. There is a possibility that the temperature will rise, or there is a possibility that the infrared intensity or ultraviolet intensity detected by the flame detector 10c will rise, so that the smoke sensor 10a is + 5% / m, and the heat sensor 10b is + 5 ° C. For the flame detector 10c, the +1 mA detection standard is changed. In this case, the detection standard for the determination unit 31b to compare with the detection output from the smoke sensor 10a is 20% / m + 5% / m = 25% / m, and the detection standard for comparison with the detection output from the heat sensor 10b is 65 ° C. + 5 ° C. = 70 ° C. The detection reference for comparison with the detection output from the flame detector 10c is 5 mA + 1 mA = 6 mA.

  Returning to FIG. 4, when the determination unit 31 b compares the detection standard changed by the determination control unit 31 a with the detection output, the detection output of any of the fire detectors 10 is not equal to or higher than the detection standard (step SA). -4, No), it returns to step SA-1, and the determination control part 31a acquires operation information from the environment change apparatus 20 (step SA-1). On the other hand, when the detection output of any one or more of the fire detectors 10 is equal to or higher than the detection reference (Yes at Step SA-4), the determination control unit 31a acquires the fire detector 10 at Step SA-1. The priority corresponding to the operation of the environmental change device 20 specified based on the operation information is acquired from the control table (step SA-5).

  In the example shown in FIG. 3, for example, when the air volume of the air conditioner 20a is large or medium, smoke may be diffused by the wind, which may make it difficult to detect the smoke with the smoke detector 10a. While the priority of 10a is 1, the priority of the flame detector 10c that is not easily affected by wind is 3.

  Further, when the stove 20b is ON, the flame of the stove 20b may be erroneously detected. Therefore, while the priority of the flame detector 10c is 1, the influence of the flame of the stove 20b is affected. The priority of the difficult smoke detector 10a is 3.

  Returning to FIG. 4, among the fire detectors 10 in which the detection output is determined to be equal to or higher than the detection reference in step SA-4, there is a fire detector 10 with the priority level 3 acquired in step SA-5 (step SA). -6, Yes), the determination unit 31b determines that a fire has occurred (step SA-7), and outputs an alarm (step SA-8).

  When there is no fire detector 10 with a priority of 3 (No at Step SA-6) and there is a fire detector 10 with a priority of 2 (Yes at Step SA-9), the determination unit 31b outputs a detection output. It is determined whether or not there are a plurality of fire detectors 10 that are equal to or greater than the detection standard (step SA-10). As a result, when it is plural (step SA-10, Yes), the determination unit 31b determines that a fire has occurred (step SA-7). Moreover, when it is not plurality (step SA-10, No), the determination part 31b determines whether it is uncertain whether or not a fire has occurred, and the determination control part 31a receives operation information from the environment change device 20 again. Obtain (step SA-1).

  In addition, when there is no fire detector 10 with the priority 2 (when only the fire detector 10 with the priority 1) (step SA-9, No), the determination unit 31b The determination control unit 31a acquires operation information from the environment change device 20 again (step SA-1).

(Effect of Embodiment 1)
As described above, according to the first embodiment, since the determination unit 31b is controlled according to the operation of the environment change device 20, the determination is made in consideration of the change that the environment change device 20 gives to the detection environment of the fire detector 10. The part 31b can be made to make an appropriate fire determination.

  In addition, since the detection reference is changed according to the operation of the environment change device 20, the determination unit 31b performs a highly accurate fire determination based on the detection reference corresponding to the change that the environment change device 20 gives to the detection environment of the fire detector 10. Can be performed.

  Moreover, since the determination part 31b determines the presence or absence of the occurrence of a fire based on the priority set according to the operation of the environment change device 20, it can be reliably determined according to the change that the environment change device 20 gives to the detection environment of the fire detector 10. The fire determination can be performed with priority given to the detection output of the fire detector 10 capable of detecting fire.

[Embodiment 2]
Next, a second embodiment will be described. This form is a form in which the fire-induced phenomenon is artificially generated from the environment changing means.

  The configuration of the second embodiment is substantially the same as the configuration of the first embodiment unless otherwise specified. The configuration substantially the same as the configuration of the first embodiment is the same as that used in the first embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

(Configuration of fire detection system)
First, the configuration of the fire detection system according to the second embodiment will be described. FIG. 5 is a block diagram functionally conceptually showing the electrical configuration of the fire detection system. As shown in FIG. 5, the fire detection system 1 includes a fire detector 10 and a fire detection device 30.

(Fire detection system configuration-fire detector)
In the second embodiment, the fire detector 10 is not connected to the fire detection device 30 via a transmission line and cannot communicate with each other. However, the fire detector 10 may be connected to a disaster prevention receiver or the like in another disaster prevention system via a transmission path.

(Configuration of fire detection system-Fire detection device)
As shown in FIG. 5, the fire detection device 30 includes a control unit 31, a detection unit 35, an environment change unit 36, an operation unit 33, and a recording unit 34. Note that the operation unit 33 and the recording unit 34 are the same as the operation unit 33 and the recording unit 34 in the first embodiment, and thus the description thereof is omitted.

  The control unit 31 includes a determination unit 31b and an environment change control unit 31c in terms of functional concept. Among these, the determination part 31b is the same as the determination part 31b in Embodiment 1, and description is abbreviate | omitted. The environment change control unit 31c controls the environment change unit 36 according to the operation of the determination unit 31b, and corresponds to the control means in the claims. Details of processing executed by each component of the control unit 31 will be described later.

  The detection unit 35 is detection means for detecting a fire-induced phenomenon that occurs due to a fire. The specific configuration of the detection unit 35 is arbitrary, and for example, a smoke sensor, a heat sensor, or a flame sensor can be used.

  The environment changing unit 36 is an environment changing unit that changes the detection environment of the fire detector 10 by generating a fire-induced phenomenon in a pseudo manner. The specific configuration of the environment changing unit 36 and what kind of detection environment of the fire detector 10 the environment changing unit 36 changes are arbitrary. For example, the detection environment of the smoke detector 10a is changed. A smoke machine that artificially generates smoke by spraying the smoke liquid in the form of a mist can be used as the environment changing unit 36.

(Processing by fire detection system)
Next, processing executed by the fire detection system 1 configured as described above will be described. FIG. 6 is a flowchart showing the flow of processing executed by the fire detection system 1.

  After the activation of the fire detection device 30, the determination unit 31b acquires a detection output from the detection unit 35 (step SB-1). Then, the acquired detection output is compared with the detection reference stored in the detection reference table (step SB-2). As a result, when the detection output is not equal to or higher than the detection reference (step SB-2, No), the process returns to step SB-1, and the determination unit 31b acquires the detection output from the detection unit 35 again (step SB-1).

  On the other hand, when the detection output is equal to or higher than the detection reference (step SB-2, Yes), the determination unit 31b determines that a fire has occurred (step SB-3). Upon receiving the fire determination by the determination unit 31b, the environment change control unit 31c generates a fire-induced phenomenon from the environment change unit 36 (step SB-4). For example, when a smoke machine is used as the environment change unit 36, smoke is generated in a pseudo manner from the smoke machine. When the smoke detector 10a detects smoke generated from the smoke machine, a notification signal is transmitted from the smoke detector 10a to a disaster prevention receiver or the like via a transmission path, and a predetermined operation such as alarm output is performed. .

(Effect of Embodiment 2)
As described above, according to the second embodiment, when the determination unit 31b determines that a fire is occurring, a fire-induced phenomenon is generated in a pseudo manner from the environment change unit 36. Even if it is not connected to a disaster prevention receiver or the like in the disaster prevention system, it is possible to notify the occurrence of a fire over a wide range via the fire sensor 10 connected to the disaster prevention receiver.

[III] Modifications to Each Embodiment While each embodiment according to the present invention has been described above, the specific configuration and means of the present invention are the same as the technical idea of each invention described in the claims. Modifications and improvements can be arbitrarily made within the range. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

(About the mutual relationship of each embodiment)
Each embodiment described above can be combined with each other in an arbitrary combination. For example, by combining the fire detection device 30 in the first embodiment and the second embodiment, the detection output from the fire detector 10 connected to the fire detection device 30 via the transmission path 2, and the network 3 Fire is determined based on the operation of the environmental change device 20 connected to the fire detection device 30 via the fire detection device 30, and a fire-induced phenomenon is generated from the environment change unit 36 based on the determination result. The occurrence of a fire can be widely notified through the fire sensor 10 that is not connected to the.

  The fire detection system according to the present invention can be applied to a fire detection system that detects a fire in a monitoring area, can perform an appropriate fire determination in consideration of a change that a predetermined device has on a detection environment, and a disaster prevention receiver. Even when a fire detector that is not connected detects the occurrence of a fire, it is useful for a fire detection system that can notify the occurrence of a fire in a wide range.

It is the block diagram which showed the electrical structure of the fire detection system functionally conceptually. It is the table | surface which illustrated the detection reference table. It is the table | surface which illustrated the control table. It is a flowchart which shows the flow of the process which a fire detection system performs. It is the block diagram which showed the electrical structure of the fire detection system functionally conceptually. It is a flowchart which shows the flow of the process which a fire detection system performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fire detection system 2 Transmission path 3 Network 10 Fire detector 10a Smoke detector 10b Thermal detector 10c Flame detector 20 Environment change device 20a Air conditioner 20b Stove 30 Fire detection device 31 Control unit 31a Judgment control unit 31b Judgment unit 31c Environmental change Control unit 32 Communication unit 33 Operation unit 34 Recording unit 35 Detection unit 36 Environment change unit

Claims (4)

Detection means for detecting a fire-induced phenomenon caused by a fire;
Environmental change means for changing the detection environment of the detection means;
Determining means for determining the presence or absence of fire based on the detection output of the detection means and a predetermined detection criterion;
Control means for controlling at least one of the determination means or the environment change means according to the operation of at least one of the determination means or the environment change means;
A fire detection system comprising: The control means changes the detection reference according to the operation of the environment changing means;
The fire detection system according to claim 1. The control means, for a plurality of the detection means for detecting the fire-induced phenomenon different from each other, set a priority according to the operation of the environment change means,
The determination means determines the presence or absence of a fire based on the detection output of the detection means, the detection criterion, and the priority;
The fire detection system according to claim 1 or 2. When the control means determines that the fire is occurring, the control means generates the fire-induced phenomenon in a pseudo manner from the environment change means,
The fire detection system according to any one of claims 1 to 3, wherein:

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