Tobacco type specific method

Abstract

To provide a fire detection device capable of improving detection accuracy of a fire, and a fire detection method.SOLUTION: A fire detection device 1 comprises: a first light-emitting section 101 which irradiates a detection space with first detection light; a second light-emitting section 102 which irradiates the detection space with second detection light; a light-receiving section 103 which receives scattered light of the irradiating first detection light caused by smoke, outputs a first light-receiving signal corresponding to the scattered light, receives scattered light of the irradiating second detection light with respect to smoke and outputs a second light-receiving signal corresponding to the scattered light; an identification section 107a for identifying a type of smoke in the detection space based on an output ratio between an output value of the first light-receiving signal and an output value of the second light-receiving signal and a rise rate of the output value of the first light-receiving signal or the second light-receiving signal; and a fire determination section 107c for determining the presence / absence of a fire based on a time in which the output value of the first light-receiving signal or the output value of the second light-receiving signal continues equal to or more than a predetermined amount in accordance with the type of smoke identified by the identification section 107a.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention provides How to identify smoke type Regarding. [Background technology]

[0002] Conventionally, one technique proposed for detecting fires based on the type of smoke is aimed at smoke detectors that detect fires in a monitored area. This involves alternately irradiating light at different times from two light-emitting means that irradiate the detection space with light of different wavelengths, receiving the scattered light from the smoke with light-receiving means, and then identifying the type of smoke based on the ratio of the output values ​​of the two light-receiving signals output from the light-receiving means that correspond to each light-emitting means (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-23458 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a growing need to improve fire detection accuracy by identifying smoke types in more detail. However, as described above, the conventional technology only identifies smoke types based on the ratio of output values ​​of two light-receiving signals. Therefore, it is difficult to identify smoke types in detail, making it difficult, for example, to quickly identify smoke from a flaming fire or to accurately identify smoke generated artificially. Therefore, there is room for improvement in terms of improving fire detection accuracy.

[0005] The present invention has been made in view of the above problems, and makes it possible to improve the accuracy of fire detection. How to identify smoke type The purpose is to provide. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the present invention provides a method for manufacturing a semiconductor device according to claim 1. How to identify smoke type is the smoke in the monitored area. Identify the type In order to How to identify smoke type the method includes a light irradiation step of irradiating the smoke with first detection light and second detection light having a wavelength different from that of the first detection light; a light receiving step of receiving first scattered light generated by scattering of the first detection light irradiated to the smoke in the light irradiation step, outputting a first received light signal corresponding to the received first scattered light, and receiving second scattered light generated by scattering of the second detection light irradiated to the smoke in the light irradiation step, outputting a second received light signal corresponding to the received second scattered light; a calculation step of calculating an output ratio between the output value of the first received light signal and the output value of the second received light signal output in the light receiving step, and a rate of increase of the output value of the first received light signal or the second received light signal; and an identification step of identifying the type of smoke corresponding to the output ratio and rate of increase calculated in the calculation step from among types of smoke pre-assigned in accordance with combinations of the output ratio and the rate of increase.

[0007] The method according to claim 2 How to identify smoke type is as claimed in claim 1 How to identify smoke type In the step of identifying the smoke, type The method includes a determination step of determining whether the smoke is due to a fire that has occurred in the monitored area based on the detected smoke. [Effects of the Invention]

[0013] The method according to claim 1 How to identify smoke typeAccording to the present invention, the output ratio between the output value of the first light-receiving signal and the output value of the second light-receiving signal output in the light-receiving step and the rate of increase of the output value of the first light-receiving signal or the second light-receiving signal are calculated in a calculation step, and the type of smoke is identified based on the output ratio and rate of increase calculated in the calculation step, so that the type of smoke can be identified in more detail (particularly, smoke from a flaming fire and smoke generated artificially can be accurately identified) compared to conventional technology (technology that identifies the type of smoke based only on the ratio of the output values ​​of two light-receiving signals). Therefore, fires can be accurately detected based on the type of smoke, and the accuracy of fire detection can be improved. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a side view showing an installation state of a fire detection device according to an embodiment. [Figure 2] FIG. 2 is a bottom view showing the fire detection device with the mounting base removed. [Figure 3] FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 4] FIG. 2 is a block diagram showing the electrical configuration of the fire detection device. [Figure 5] 10 is a flowchart of a fire detection process according to an embodiment. [Figure 6] 1 is a diagram showing types of smoke, with the horizontal axis representing the rate of rise and the vertical axis representing the output ratio. [Figure 7] 4 is a flowchart of a failure detection process according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0015] The following is a description of the present invention. How to identify smoke type The following describes in detail the embodiments of the present invention with reference to the drawings. First, [I] the basic concept of the embodiments will be explained, then [II] specific details of the embodiments will be explained, and finally, [III] modifications to the embodiments will be explained. However, the present invention is not limited to the embodiments.

[0016] First, the basic concept of the embodiment will be described. How to identify smoke type It is related to.

[0017] Here, in the embodiment, the "fire detection device" is a device that optically detects and notifies a fire in a monitored area, and is a concept that includes, for example, optical fire detectors and fire alarms. The "monitored area" is an area to be monitored, and is a concept that includes, for example, an area inside a building and an area outside a building. The "building" may have any specific structure or type, and is a concept that includes, for example, a detached house, an apartment complex, an office building, an event facility, a commercial facility, and a public facility. The "notifying" is a concept that includes, for example, outputting predetermined information to an external device, displaying or outputting the predetermined information as audio via an output means (display means or audio output means), and the like. In the following embodiment, a case will be described in which the "fire detection device" is an "optical fire detector" and the "monitored area" is an "interior area of ​​an office building."

[0018] [II] Specific details of the embodiment Next, specific details of the embodiment will be described.

[0019] (composition) First, the configuration of a fire detection device according to an embodiment will be described. FIG. 1 is a side view showing the installation state of a fire detection device according to an embodiment. FIG. 2 is a bottom view showing the fire detection device with a mounting base (described later) removed. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. In the following description, the X direction in FIG. 1 is referred to as the left-right direction of the fire detection device (the +X direction is the left direction of the fire detection device, and the -X direction is the right direction of the fire detection device), the Y direction in FIG. 2 is referred to as the front-rear direction of the fire detection device (the +Y direction is the front direction of the fire detection device, and the -Y direction is the rear direction of the fire detection device), and the Z direction in FIG. 1 is referred to as the up-down direction of the fire detection device (the +Z direction is the up direction of the fire detection device, and the -Z direction is the down direction of the fire detection device). Furthermore, with respect to the center position of the detection space in FIG. 3 as a reference, the direction away from the detection space will be referred to as the "outside" and the direction approaching the detection space will be referred to as the "inside."

[0020] The fire detection device 1 is a device that detects and reports a detectable substance (for example, smoke) contained in gas. This fire detection device 1 is installed indoors on an installation surface 2 that is located below the ceiling of a building, and includes a mounting base 10, an outer cover 20, an inner cover 30, an inflow space 40, an insect screen 50, a detection space 60, a detection unit cover 70, a detection unit main body 80, a terminal board 90, and a circuit board 100, as shown in Figures 1 to 3 .

[0021] (Configuration - Mounting base) Returning to Fig. 1, the mounting base 10 is a mounting means for mounting the outer cover 20 to the installation surface 2. This mounting base 10 is configured using, for example, a mounting base for a known fire detection device (for example, a substantially plate-shaped mounting base made of resin), and as shown in Fig. 1, is fixed to the installation surface 2 by a fixture or the like.

[0022] (Configuration - Outer cover) The outer cover 20 is a cover that covers the inner cover 30, the inflow space 40, the insect screen 50, the detection space 60, the detection unit cover 70, the detection unit main body 80, the terminal board 90, and the circuit board 100. The outer cover 20 is formed, for example, from a resin material having light-blocking properties, and includes an outer cover main body 21, a top surface portion 22, a first rib portion 23, and a second rib portion 24, as shown in Figures 1 to 3 .

[0023] Of these, the outer cover body 21 is the basic structure of the outer cover 20. This outer cover body 21 is formed, for example, as a substantially hollow cylindrical body with open top and bottom surfaces, and as shown in Fig. 1, is disposed so that the upper end of the outer cover body 21 abuts against the bottom surface of the mounting base 10, and is fixed to the mounting base 10 by a fitting structure (or a fixing device) or the like.

[0024] The top surface portion 22 is a partitioning means for partitioning the inflow space 40. The top surface portion 22 is formed, for example, from a substantially circular plate-like body, and is provided substantially horizontally below the outer cover main body 21 as shown in Fig. 1 to Fig. 3. As shown in Fig. 2, the top surface portion 22 is provided with a display hole 22a. The display hole 22a is a through-hole for guiding light emitted from a display unit 104 (described later) to the outside of the fire detection device 1 via a light guide 104a in Fig. 2 and the display hole 22a.

[0025] The first rib portions 23 are partitioning means for partitioning the inflow space 40. The first rib portions 23 are formed of a substantially plate-like body and are provided perpendicularly between the outer cover main body 21 and the top surface portion 22. Specifically, as shown in FIGS. 1 and 3 , a plurality of first rib portions 23 are provided radially from near the center of the outer cover 20 and are connected to the outer cover main body 21 and the top surface portion 22.

[0026] The second rib portions 24 are partitioning means for partitioning the inflow space 40. The second rib portions 24 are formed of a substantially plate-like body and are provided perpendicularly between the outer cover main body 21 and the top surface portion 22. Specifically, as shown in Figs. 1 and 3, the second rib portions 24 are provided between the inner ends of adjacent first rib portions 23 and are connected to the outer cover main body 21 and the top surface portion 22.

[0027] (Configuration-Inflow space) 1, the inflow space 40 is a space for allowing gas outside the fire detection device 1 to flow into the fire detection device 1. A plurality of inflow spaces 40 are formed inside the outer cover 20, and specifically, as shown in FIGS. 1 and 3, the space within the inner space of the outer cover 20 that is surrounded by the top surface portion 22, the first rib portion 23, the second rib portion 24, and the inner cover 30 is formed as the inflow space 40.

[0028] (Configuration - Inner cover) The inner cover 30 is a cover that covers the detection space 60, the detection unit cover 70, the detection unit main body 80, and the substrate 100, and also serves as a partitioning means for partitioning the inflow space 40. The inner cover 30 is, for example, a substantially hollow cylindrical body with an open top, and is formed of a light-blocking resin material. As shown in FIG. 3, the inner cover 30 is provided inside the outer cover 20 so that the lower surface of the inner cover 30 faces the top surface 22 of the outer cover 20 across the inflow space 40. Also, as shown in FIG. 3, a first opening 30a is formed in the lower surface of the inner cover 30. The first opening 30a is an opening for sending gas that has flowed into the inflow space 40 to the detection space 60, and is provided in approximately the center and its neighboring portion of the lower surface of the inner cover 30, as shown in FIG.

[0029] (Configuration-detection space) The detection space 60 is a space for detecting the substance to be detected, and as shown in Figure 3, the space within the internal space of the inner cover 30 that is surrounded by the detection unit cover 70 and the detection unit main body 80 is formed as the detection space 60.

[0030] (Configuration - detector cover) The detection unit cover 70 serves as a partitioning means for partitioning the detection space 60 and as an incidence suppression means for suppressing the incidence of ambient light into the detection space 60. The detection unit cover 70 is a generally hollow cylindrical body with an open top and is made of a light-blocking resin material. As shown in FIG. 3 , the detection unit cover 70 is disposed inside the inner cover 30 so that the bottom surface of the detection unit cover 70 faces the top surface 22 of the outer cover 20 across the first opening 30a and the inflow space 40, and is fixed to the detection unit main body 80. As shown in FIG. 3 , a second opening 70a is formed in the bottom surface of the detection unit cover 70. The second opening 70a is an opening through which the gas sent from the first opening 30a flows into the detection space 60, and is provided in a portion of the bottom surface of the detection unit cover 70 corresponding to the first opening 30a, as shown in FIG. 3 .

[0031] (Composition - Insect net) The insect screen 50 is a net for preventing insects outside the fire detection device 1 from entering the detection space 60. The insect screen 50 is made of a circular mesh net, and is attached to the detection unit cover 70 as shown in FIG.

[0032] (Configuration - Detector body) The detection unit main body 80 is an attachment means for attaching the detection unit cover 70 and an incidence suppression means for suppressing the incidence of ambient light into the detection space 60. The detection unit main body 80 is formed, for example, from a resin material having light-blocking properties, and is disposed so as to cover the upper surface of the detection unit cover 70 as shown in FIG. 3 , and is fixed to the substrate 100 by a fixture or the like. The detection unit main body 80 is also provided with support portions (not shown) for supporting a first light-emitting unit 101 (to be described later), a second light-emitting unit 102 (to be described later), and a light-receiving unit 103 (to be described later), respectively. The detection unit main body 80 is also formed with optical path holes (not shown) for forming optical paths between the detection space 60 and each of the first light-emitting unit 101 (to be described later), the second light-emitting unit 102 (to be described later), and the light-receiving unit 103 (to be described later).

[0033] (Configuration - terminal board) The terminal board 90 is a housing means for housing the inner cover 30, the detection unit cover 70, the detection unit main body 80, and the substrate 100. The terminal board 90 is a generally hollow columnar shape with an open bottom, and is formed of, for example, a light-blocking resin material. As shown in Fig. 3, the terminal board 90 is provided so as to cover the inner cover 30, the detection unit cover 70, the detection unit main body 80, and the substrate 100 from above, and is fixed to the outer cover 20 by a fitting structure or the like, and is also fixed to the mounting base 10 by a fixture or the like via a first mounting hole (not shown) formed in the mounting member 91.

[0034] (Configuration - Board) Fig. 4 is a block diagram showing the electrical configuration of the fire detection device 1. The substrate 100 is a mounting means on which various electric circuits (not shown) are mounted. The substrate 100 is configured using, for example, a known flat circuit board or the like, and as shown in Fig. 3, is disposed substantially horizontally inside the terminal board 90 with a gap between it and the upper and lower ends of the terminal board 90, and is fixed to the terminal board 90 by a fixture via a mounting hole (not shown) formed in the terminal board 90 and a second mounting hole (not shown) formed in the mounting member 91.

[0035] In addition to having known electronic components used in conventional fire detection devices 1 mounted on the substrate 100, as shown in FIG. 4, the substrate 100 also has a first light-emitting unit 101, a second light-emitting unit 102, a light-receiving unit 103, a display unit 104, a communication unit 105, a power supply unit 106, a control unit 107, and a memory unit 108 mounted thereon.

[0036] (Configuration - substrate - first light-emitting unit, second light-emitting unit, light-receiving unit) Of these, the first light-emitting unit 101 is a first light-emitting means that irradiates the detection space 60 with detection light (hereinafter referred to as "first detection light") through an optical path hole in the detection unit main body 80, and is configured using, for example, a known light-emitting element (an infrared LED, for example). The second light-emitting unit 102 is a second light-emitting means that irradiates the detection space 60 with detection light (hereinafter referred to as "second detection light") having a wavelength different from that of the first detection light through an optical path hole in the detection unit main body 80, and is configured using, for example, a known light-emitting element (a blue LED, for example). Furthermore, the light receiving unit 103 is a light receiving means that receives scattered light caused by smoke in the first detection light irradiated from the first light emitting unit 101 through the light path holes of the detection unit main body 80 and outputs a first light receiving signal corresponding to the received scattered light, and also receives scattered light caused by smoke in the second detection light irradiated from the second light emitting unit 102 through the light path holes and outputs a second light receiving signal corresponding to the received scattered light, and is configured using, for example, a known light receiving element (a photodiode, for example). Furthermore, the first light emitting unit 101, the second light emitting unit 102, and the light receiving unit 103 may be installed in any manner, but in this embodiment, they are installed so as to prevent the first detection light or the second detection light irradiated from the first light emitting unit 101 or the second light emitting unit 102 from directly reaching the light receiving unit 103 through the various light path holes of the detection unit main body 80. 2, for example, the first light-emitting unit 101 and the light-receiving unit 103 are placed at a position where the angle between the optical axis of the first light-emitting unit 101 (hereinafter referred to as the "first light-emitting side optical axis") and the optical axis of the light-receiving unit 103 (hereinafter referred to as the "light-receiving side optical axis") is approximately 135°. The second light-emitting unit 102 and the light-receiving unit 103 are placed at a position where the angle between the optical axis of the second light-emitting unit 102 (hereinafter referred to as the "second light-emitting side optical axis") and the light-receiving side optical axis is approximately 90°.

[0037] (Configuration - board - display section, communication section, power supply section) The display unit 104 is a display means for displaying various information (e.g., information indicating whether a fire has been detected) and is configured using, for example, known display means (such as an LED). The display unit 104 may project light in any manner, including, for example, guiding light from the display unit 104 toward the outside of the fire detection device 1 via a light guide 104a inserted through insertion holes (not shown) provided in the inner cover 30, the detection unit cover 70, and the detection unit main body 80 and through the display hole 22a in the outer cover 20. The communication unit 105 is a communication means for communicating with an external device (e.g., a receiver). The power supply unit 106 is a power supply means for supplying power, supplied from a commercial power source or a battery (not shown), to each component of the fire detection device 1.

[0038] (Configuration - Board - Control Unit) The control unit 107 is a control means for controlling the fire detection device 1. Specifically, the control unit 107 is a computer including a CPU, various programs interpreted and executed on the CPU (including basic control programs such as an OS, and application programs that are started on the OS and realize specific functions), and an internal memory such as a RAM for storing the programs and various data.

[0039] As shown in FIG. 4, the control unit 107 conceptually includes a determination unit 107a, an adjustment unit 107b, a fire determination unit 107c, a recording control unit 107d, a failure determination unit 107e, and a notification unit 107f.

[0040] The identification unit 107a is an identification means that identifies the type of smoke present in the detection space 60 based on the output ratio (hereinafter referred to as the "output ratio") between the output value of the first light receiving signal and the output value of the second light receiving signal output from the light receiving unit 103, and the rate of increase (hereinafter referred to as the "rate of increase") of the output value of the first light receiving signal or the second light receiving signal. Here, in the embodiment, the "type of smoke" is described as including smoke from a flaming fire, smoke from a smoldering fire, artificially generated smoke (for example, smoke generated when cooking a hamburger, etc.), steam, water mist, dust, etc., but is not limited to these and may include smoke other than these smokes, for example.

[0041] The adjusting unit 107b is an adjusting means that adjusts the output value of the first received light signal or the output value of the second received light signal according to the type of smoke identified by the identifying unit 107a.

[0042] The fire detection unit 107c is a fire detection means for determining whether or not a fire exists based on the output value of the first light receiving signal or the output value of the second light receiving signal adjusted by the adjustment unit 107b.

[0043] The recording control unit 107d is a recording control means that stores the determination result of the fire determination unit 107c in the storage unit 108 as history information.

[0044] The fault determination unit 107e is a fault determination means that determines whether or not the first light-emitting unit 101 or the second light-emitting unit 102 has a fault.

[0045] The notification unit 107f is a notification means for notifying the result of the determination made by the malfunction determination unit 107e. Details of the processing executed by the control unit 107 will be described later.

[0046] (Configuration - Substrate - Storage Unit) The storage unit 108 is a storage means for storing programs and various data necessary for the operation of the fire detection device 1. The storage unit 108 is configured using a rewritable recording medium, and a non-volatile recording medium such as a flash memory can be used for example.

[0047] (process) Next, a description will be given of the processing executed by the fire detection device 1 configured as above. The processing executed by this fire detection device 1 is roughly divided into fire detection processing and fault detection processing. Below, a description will be given of each of the fire detection processing and the fault detection processing.

[0048] (Processing - Fire Detection Processing) First, the fire detection process will be described. Fig. 5 is a flowchart of the fire detection process according to the embodiment (in the following description of each process, steps will be abbreviated as "S"). The fire detection process is, in outline, a process for detecting a fire in a monitored area. This fire detection process can be executed at any timing, but in the embodiment, it will be described as being started after the fire detection device 1 is powered on.

[0049] When the fire detection process is started, as shown in FIG. 5, the control unit 107 causes the first light-emitting unit 101 to emit the first detection light at SA1.

[0050] In SA2, the control unit 107 determines whether or not at least one first received light signal has been acquired from the light receiving unit 103. If the control unit 107 determines that the first received light signal has not been acquired (SA2, No), it proceeds to SA1, and if the control unit 107 determines that the first received light signal has been acquired (SA2, Yes), it stops the emission of the first light emitting unit 101 and then proceeds to SA3.

[0051] In SA3, the control unit 107 causes the second light emitting unit 102 to emit the second detection light.

[0052] In SA4, the control unit 107 determines whether or not at least one second received light signal has been acquired from the light receiving unit 103. If the control unit 107 determines that the second received light signal has not been acquired (SA4, No), it proceeds to SA3, and if the control unit 107 determines that the second received light signal has been acquired (SA4, Yes), it stops the emission of the second light emitting unit 102 and then proceeds to SA5.

[0053] In SA5, the control unit 107 determines whether a predetermined time has elapsed. If the control unit 107 determines that the predetermined time has not elapsed (SA5, No), it proceeds to SA1, and if the control unit 107 determines that the predetermined time has elapsed (SA5, Yes), it proceeds to SA6.

[0054] In SA6, the identifying unit 107a calculates the output ratio based on the first light receiving signal acquired in SA2 and the second light receiving signal acquired in SA4. The method for calculating this output ratio is arbitrary, but for example, first, among the first light receiving signals acquired in SA2 until a predetermined time has elapsed in SA5, the output value of the first light receiving signal most recently acquired is extracted. Next, among the second light receiving signals acquired in SA4 until the predetermined time has elapsed in SA5, the output value of the second light receiving signal most recently acquired is extracted. The output value of the extracted second light receiving signal is then calculated from the output value of the extracted first light receiving signal (the same applies to SA15, described later).

[0055] In SA7, the identifying unit 107a calculates the rate of increase based on the first light receiving signal acquired in SA2 or the second light receiving signal acquired in SA4. The method for calculating this rate of increase is arbitrary, but for example, in SA5, among the first light receiving signals acquired in SA2 until a predetermined time has elapsed, the output value of the first light receiving signal acquired first is extracted, and the output value of the first light receiving signal acquired most recently (last) is extracted. The rate of increase is then calculated based on these extracted output values ​​and the following formula (1) (the same applies to SA16, which will be described later). Rise rate = (the output value of the most recently acquired first light receiving signal) / (the output value of the first light receiving signal acquired initially) - 1 Formula (1)

[0056] In SA8, the identification unit 107a identifies the type of smoke based on the output ratio calculated in SA6 and the rate of increase calculated in SA7.

[0057] Here, the method for identifying the type of smoke is arbitrary, but in this embodiment, it is as follows (the same applies to SA17 described later). FIG. 6 is a diagram showing types of smoke, with the horizontal axis representing the rate of rise and the vertical axis representing the output ratio. That is, when the rate of rise is greater than the rise threshold and the output ratio is greater than the first output threshold and less than the third output threshold, the smoke type is identified as smoke from a flaming fire, as shown in FIG. 6. When the rate of rise is less than the rise threshold and the output ratio is greater than the second output threshold and less than the fourth output threshold, the smoke type is identified as smoke generated artificially, as shown in FIG. 6. When the rate of rise is less than the rise threshold and the output ratio is greater than the fourth output threshold and less than the fifth output threshold, or when the rate of rise is greater than the rise threshold and the output ratio is greater than the third output threshold and less than the fifth output threshold, the smoke type is identified as smoke from a smoldering fire, as shown in FIG. 6. Furthermore, regardless of the magnitude of the rate of rise, if the output ratio is greater than the fifth output threshold, the smoke type is identified as steam, water mist, or dust, as shown in Figure 6. Furthermore, if the rate of rise is less than the rise threshold and the output ratio is less than the second output threshold, or if the rate of rise is greater than the rise threshold and the output ratio is less than the first output threshold, the smoke type is identified as other smoke (for example, smoke including flaming fires, etc.), as shown in Figure 6. This makes it possible to identify the smoke type as smoke from a flaming fire, smoke from a smoldering fire, artificially generated smoke, steam, water mist, dust, and other smoke, making it possible to identify the smoke type in more detail.

[0058] In SA9, the adjusting unit 107b adjusts the output value of the first received light signal or the output value of the second received light signal output from the light receiving unit 103 according to the type of smoke identified in SA8.

[0059] The method for adjusting this output value is arbitrary, but in this embodiment, it is as follows. That is, if the type of smoke is identified in SA8 as smoke from a flaming fire, only the output value of the first light receiving signal is increased, for example, by about two times. This is because the amount of smoke from a flaming fire is less than the amount of smoke from a smoldering fire, enabling early detection of a flaming fire. Also, if the type of smoke is identified in SA8 as artificially generated smoke, only the output value of the first light receiving signal is decreased, for example, by about half. This is because it is difficult to distinguish between artificially generated smoke and smoke from a smoldering fire, and there is a need to detect fires during cooking, so artificially generated smoke must be carefully identified. Also, if the type of smoke is identified in SA8 as smoke from a smoldering fire, steam, water mist, dust, or other smoke, the output values ​​of the first light receiving signal and the second light receiving signal are maintained. This enables accurate re-identification of the type of smoke in SA17, which will be described later.

[0060] Returning to FIG. 5, in SA10, the control unit 107 causes the first light-emitting unit 101 to emit the first detection light.

[0061] In SA11, the control unit 107 determines whether or not at least one first received light signal has been acquired from the light receiving unit 103. If the control unit 107 determines that the first received light signal has not been acquired (SA11, No), it proceeds to SA10, and if the control unit 107 determines that the first received light signal has been acquired (SA11, Yes), it stops the emission of the first light emitting unit 101 and then proceeds to SA12.

[0062] In SA12, the control unit 107 causes the second light emitting unit 102 to emit the second detection light.

[0063] In SA13, the control unit 107 determines whether or not at least one second received light signal has been acquired from the light receiving unit 103. If the control unit 107 determines that the second received light signal has not been acquired (SA13, No), it proceeds to SA12, and if the control unit 107 determines that the second received light signal has been acquired (SA13, Yes), it stops the emission of the second light emitting unit 102 and then proceeds to SA14.

[0064] In SA14, the control unit 107 determines whether a predetermined time has elapsed. If the control unit 107 determines that the predetermined time has not elapsed (SA14, No), it proceeds to SA10, and if the control unit 107 determines that the predetermined time has elapsed (SA14, Yes), it proceeds to SA15.

[0065] In SA15, the specifying unit 107a calculates the output ratio based on the first light receiving signal acquired in SA11 and the second light receiving signal acquired in SA13.

[0066] In SA16, the specifying unit 107a calculates the rate of increase based on the first light receiving signal acquired in SA11 or the second light receiving signal acquired in SA13.

[0067] In SA17, the identification unit 107a re-identifies the type of smoke based on the output ratio calculated in SA15 and the rate of rise calculated in SA16.

[0068] In SA18, the fire determination unit 107c determines whether or not a fire exists based on the type of smoke re-identified in SA17. While any method for determining whether or not a fire exists may be used, in this embodiment, if the type of smoke is determined in SA17 to be smoke from a flaming fire, smoke from a smoldering fire, or other smoke, it determines that a fire has been detected. If the type of smoke is determined in SA17 to be artificially generated smoke, steam, water mist, or dust, it determines that a fire has not been detected. If the fire determination unit 107c determines that a fire has not been detected (SA18, No), it proceeds to SA1, and repeats the processes from SA1 to SA17 until it determines that a fire has not been detected in SA18. On the other hand, if it determines that a fire has been detected (SA18, Yes), it proceeds to SA19. For example, if the output value of the first light receiving signal or the output value of the second light receiving signal is adjusted in SA9 and it is determined in SA18 that a fire has not been detected, the fire detection unit 107c returns the output value of the first light receiving signal or the output value of the second light receiving signal to the state before the adjustment and then proceeds to SA1.

[0069] In SA19, the alarm unit 107f executes a fire alarm process. Here, the "fire alarm process" is a process of notifying that a fire has been detected in SA18. Specifically, the alarm unit 107f outputs a signal (hereinafter referred to as a "fire signal") including information indicating that a fire has been detected in SA18 to an external device. This allows the external device to be notified that a fire has been detected, thereby improving the user's convenience in detecting a fire. For example, if the external device is a receiver, the receiver can execute a fire extinguishing process using a predetermined fire extinguishing facility based on the fire signal input from the fire detection device 1.

[0070] In SA20, the recording control unit 107d records the determination result of SA18 in the recording unit as history information, and then terminates the fire detection process. Here, the method for recording the determination result of SA18 is arbitrary. For example, information indicating that a fire was detected by SA18 and information indicating the time the fire was detected are recorded in a history table (not shown) provided in the recording unit, in association with each other. Then, by sequentially recording this information in the history table each time the process of SA20 is performed, this information is recorded as history information. This allows the determination result of the fire determination unit 107c to be recorded as history information, enabling the user to understand, for example, how a false alarm was generated.

[0071] This type of fire detection process allows for more detailed identification of smoke types (particularly, accurate identification of smoke from flaming fires and artificially generated smoke) than conventional techniques (techniques that identify smoke types based solely on the ratio of output values ​​of two light-receiving signals). Therefore, fires can be accurately detected based on the type of smoke, improving the accuracy of fire detection. Furthermore, the presence or absence of a fire can be determined based on the output value of the first light-receiving signal or the output value of the second light-receiving signal adjusted by the adjustment unit 107b, enabling even more accurate detection of fires based on the type of smoke.

[0072] (Processing - Fault detection processing) Next, the fault detection process will be described. Fig. 7 is a flowchart of the fault detection process according to the embodiment. The fault detection process is, in outline, a process for detecting a fault in the first light-emitting unit 101 or the second light-emitting unit 102. The timing for executing this fault detection process is arbitrary, but in the embodiment, the fault detection process will be described as being started after the fire detection device 1 is powered on and executed in parallel with the fire detection process.

[0073] When the fault detection process is initiated, as shown in FIG. 7, the control unit 107 determines in SB1 whether the timing for detecting a fault in the first light-emitting unit 101 or the second light-emitting unit 102 (hereinafter referred to as the "detection timing") has arrived. The method for determining whether the detection timing has arrived is arbitrary, but for example, the determination may be based on whether a predetermined time has elapsed since the control process was initiated, whether a predetermined time has elapsed since it was determined in SB5 (described later) that a fault in the second light-emitting unit 102 has not been detected, or whether a predetermined time has elapsed since the processing in SB6 (described later) has ended. If any of the predetermined times has elapsed, the control unit 107 determines that the detection timing has arrived, and if neither of the predetermined times has elapsed, the control unit 107 determines that the detection timing has arrived. The control unit 107 then waits until the detection timing arrives (SB1, No), and if it is determined that the detection timing has arrived (SB1, Yes), the control unit 107 proceeds to SB2.

[0074] In SB2, the control unit 107 acquires the output value of the first light receiving signal and the output value of the second light receiving signal. The method of acquiring these output values ​​is arbitrary, but for example, from the first light receiving signals and second light receiving signals acquired in the fire detection process, a plurality of first light receiving signals and second light receiving signals acquired within a predetermined period (for example, a period from the start of the SB2 process to a predetermined time before) are extracted, and the output value of each of the extracted plurality of first light receiving signals and second light receiving signals is acquired.

[0075] In SB3, the fault determination unit 107e determines whether or not there is a fault in the first light-emitting unit 101. Here, the method of determining whether or not there is a fault in the first light-emitting unit 101 is arbitrary. For example, the determination may be made based on whether or not the output values ​​of the plurality of first light-receiving signals acquired in SB2 satisfy a reference value. If at least some of the output values ​​of the plurality of first light-receiving signals do not satisfy the reference value, it is determined that a fault in the first light-emitting unit 101 has been detected. If all of the output values ​​of the plurality of first light-receiving signals satisfy the reference value, it is determined that a fault in the first light-emitting unit 101 has not been detected (note that the process in SB5, described below, is substantially the same). Then, if the fault determination unit 107e determines that a fault in the first light-emitting unit 101 has been detected (SB3, Yes), it proceeds to SB4. If the fault determination unit 107e determines that a fault in the first light-emitting unit 101 has not been detected (SB3, No), it proceeds to SB5.

[0076] In SB4, the notification unit 107f executes a first failure notification process. Here, the "first failure notification process" is a process of notifying that a failure of the first light-emitting unit 101 has been detected in SB3. Specifically, the notification unit 107f outputs a signal (hereinafter referred to as a "first failure signal") including information indicating that a failure of the first light-emitting unit 101 has been detected in SB3 to an external device.

[0077] In SB5, the failure determination unit 107e determines whether or not there is a failure in the second light-emitting unit 102. If it is determined that a failure in the second light-emitting unit 102 has been detected (SB5, Yes), the failure determination unit 107e proceeds to SB6, and if it is determined that a failure in the second light-emitting unit 102 has not been detected (SB5, No), the failure determination unit 107e proceeds to SB1.

[0078] In SB6, the notification unit 107f executes a second fault notification process. Here, the "second fault notification process" is a process for notifying that a fault in the second light-emitting unit 102 has been detected in SB5. Specifically, the notification unit 107f outputs a signal (hereinafter referred to as a "second fault signal") including information indicating that a fault in the second light-emitting unit 102 has been detected in SB5 to an external device. Then, after processing SB6, the control unit 107 transitions to SB1 and repeats the processes from SB1 to SB6.

[0079] By performing such a fault detection process, the result of the determination by the fault determination unit 107e can be notified to the user, and the user can take measures to deal with the fault in the first light-emitting unit 101 or the second light-emitting unit 102.

[0080] (Effects of the embodiment) As described above, according to the embodiment, the present invention includes light-receiving unit 103, which receives first detection light irradiated from first light-emitting unit 101 and scattered by smoke, and outputs a first light-receiving signal corresponding to the received scattered light, and receives second detection light irradiated from second light-emitting unit 102 and scattered by smoke, and outputs a second light-receiving signal corresponding to the received scattered light, and identification unit 107a, which identifies the type of smoke in detection space 60 based on the output ratio between the output value of the first light-receiving signal and the output value of the second light-receiving signal output from light-receiving unit 103 and the rate of increase in the output value of the first light-receiving signal or the second light-receiving signal. This allows for more detailed identification of the type of smoke (particularly, it allows for accurate identification of smoke from a flaming fire and smoke generated artificially) than the prior art (a technology that identifies the type of smoke based only on the ratio of the output values ​​of two light-receiving signals). Therefore, fires can be accurately detected based on the type of smoke, improving the accuracy of fire detection.

[0081] In addition, the device is equipped with an adjustment unit 107b that adjusts the output value of the first received light signal or the output value of the second received light signal according to the type of smoke identified by the identification unit 107a, and a fire detection unit 107c that determines whether or not a fire exists based on the output value of the first received light signal or the output value of the second received light signal adjusted by the adjustment unit 107b, so that it is possible to determine whether or not a fire exists based on the output value of the first received light signal or the output value of the second received light signal adjusted by the adjustment unit 107b, making it possible to more accurately detect fires based on the type of smoke.

[0082] In addition, the fire detection device 1 is equipped with a recording control unit 107d that stores the judgment result of the fire judgment unit 107c as history information in the memory unit 108, so that the judgment result of the fire judgment unit 107c can be recorded as history information, allowing the user to understand, for example, how a false alarm was made.

[0083] In addition, the types of smoke include smoke from flaming fires, smoke from smoldering fires, artificially generated smoke, and steam, so it is possible to identify the types of smoke as smoke from flaming fires, smoke from smoldering fires, artificially generated smoke, and steam, making it possible to identify the types of smoke in more detail.

[0084] In addition, the device is equipped with a fault determination unit 107e that determines whether or not there is a fault in the first light-emitting unit 101 or the second light-emitting unit 102, and a notification unit 107f that notifies the user of the determination result by the fault determination unit 107e, so that the user can be notified of the determination result by the fault determination unit 107e, allowing the user to take measures against a fault in the first light-emitting unit 101 or the second light-emitting unit 102.

[0085] [III] Modifications to the embodiment Although the embodiments of the present invention have been described above, the specific configurations and means of the present invention can be modified and improved as desired within the scope of the technical ideas of the inventions set forth in the claims. Such modifications will be described below.

[0086] (About the problem to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and may vary depending on the implementation environment of the invention and the details of the configuration, and may solve only some of the problems described above or achieve only some of the effects described above.

[0087] (Regarding decentralization and integration) Furthermore, the electrical components described above are merely functional concepts and do not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution or integration of each component is not limited to that shown in the figure, and all or part of the components can be functionally or physically distributed or integrated in any unit depending on various loads, usage conditions, etc. Furthermore, the term "device" in this application is not limited to a single device, but also includes a device composed of multiple devices. For example, the fire detection device 1 may be distributed across multiple devices configured to be able to communicate with each other, with the control unit 107 provided in some of the multiple devices and the memory unit 108 provided in other of the multiple devices.

[0088] (Applicable subjects of fire detection devices) In the above embodiment, the fire detection device 1 is described as being applied to a fire detection device in which the detection space 60 is located inside the fire detection device, but this is not limited to this, and the fire detection device may also be applied to, for example, a fire detection device in which the detection space 60 is located outside the fire detection device.

[0089] (About insect screens) In the above embodiment, the insect screen 50 is described as being attached to the detection unit cover 70, but this is not limiting and the screen may be attached to the inner cover 30, for example.

[0090] (Fire detection processing) In the above embodiment, the processes from SA9 to SA17 are described as being performed, but this is not limiting, and for example, the processes from SA9 to SA17 may be omitted. In this case, in SA18, the presence or absence of a fire may be determined based on the type of smoke identified in SA8. Also, the adjustment unit 107b may be omitted.

[0091] Furthermore, in the above embodiment, the processing of SA20 is performed, but this is not limiting, and for example, the processing of SA20 may be omitted, in which case the recording control unit 107d may also be omitted.

[0092] In the above embodiment, the rate of increase is calculated in SA7 based on the first light reception signal acquired in SA2, but this is not limiting. For example, the rate of increase may be calculated based on the second light reception signal acquired in SA4. Alternatively, the rate of increase to be calculated may be the average of the rate of increase calculated based on the first light reception signal and the rate of increase calculated based on the second light reception signal.

[0093] In the above embodiment, the output value of the first light receiving signal is adjusted in SA9, but this is not limiting. For example, the output value of the second light receiving signal may be adjusted (as an example, if the type of smoke is identified as smoke from a flaming fire in SA8, only the output value of the second light receiving signal may be reduced). Alternatively, the output value of the first light receiving signal and the output value of the second light receiving signal may be adjusted.

[0094] In the above embodiment, the fire detection device 1 is described as outputting a fire signal to an external device at SA19, but this is not limiting. For example, the fire detection device 1 may include an output means (for example, a display means or an audio output means), and the output means may display or output audio information indicating that a fire has been detected at SA18.

[0095] Furthermore, in the above embodiment, after the type of smoke is identified in SA8, the type of smoke is re-identified based on the output value of the first light receiving signal or the output value of the second light receiving signal adjusted by the adjustment unit 107b, and the fire identification unit 107c determines whether or not there is a fire based on the re-identified type of smoke. However, this is not limiting. For example, after the type of smoke is identified in SA8, the presence or absence of a fire may be determined based on whether or not the output value of the first light receiving signal (or the output value of the second light receiving signal) adjusted by the adjustment unit 107b is equal to or greater than a determination reference value (specifically, a determination reference output value). Alternatively, after the type of smoke is identified in SA8, the presence or absence of a fire may be determined based on whether or not the time during which the output value of the first light receiving signal (or the output value of the second light receiving signal) remains equal to or greater than a predetermined amount is equal to or greater than a determination reference value (specifically, a determination reference time). Alternatively, if the fire detection device includes an adjustment unit that adjusts the determination reference value according to the type of smoke identified by the identification unit 107a, the determination may be made as follows. That is, after the type of smoke is identified in SA8, the presence or absence of a fire may be determined based on whether or not the output value of the first light receiving signal is equal to or greater than the determination reference value adjusted by the adjustment means. Alternatively, after the type of smoke is identified in SA8, the presence or absence of a fire may be determined based on whether or not the time during which the output value of the first light receiving signal (or the output value of the second light receiving signal) remains equal to or greater than a predetermined amount is equal to or greater than the determination reference value adjusted by the adjustment means. In these cases, for example, it is desirable to adjust the determination reference value so that if the type of smoke is identified in SA8 as artificially generated smoke, the determination reference value is increased (or lengthened), and if the type of smoke is identified in SA8 as smoke from a flaming fire, the determination reference value is decreased (or shortened).

[0096] (Fault detection process) In the above embodiment, the fault detection process is executed, but the present invention is not limited to this, and the fault detection process may be omitted. In this case, the fault determination unit 107e may be omitted.

[0097] (Addendum) The fire detection device of Appendix 1 is a fire detection device for detecting and alerting a fire in a monitored area, and includes: a first light-emitting means for irradiating a detection space located inside or outside the fire detection device with a first detection light; a second light-emitting means for irradiating the detection space with a second detection light having a wavelength different from that of the first detection light; a light-receiving means for receiving scattered light of the first detection light irradiated from the first light-emitting means by smoke and outputting a first light-receiving signal corresponding to the received scattered light, and for receiving scattered light of the second detection light irradiated from the second light-emitting means by smoke and outputting a second light-receiving signal corresponding to the received scattered light; and an identification means for identifying the type of smoke in the detection space based on the output ratio between the output value of the first light-receiving signal and the output value of the second light-receiving signal output from the light-receiving means and the rate of increase of the output value of the first light-receiving signal or the second light-receiving signal.

[0098] In addition, the fire detection device of Appendix 2 is the fire detection device described in Appendix 1, and further comprises an adjustment means for adjusting the output value of the first light receiving signal or the output value of the second light receiving signal according to the type of smoke identified by the identification means, and a fire determination means for determining the presence or absence of a fire based on the output value of the first light receiving signal or the output value of the second light receiving signal adjusted by the adjustment means.

[0099] In addition, the fire detection device of Appendix 3 is the fire detection device described in Appendix 1, and is equipped with a fire determination means for determining whether or not a fire exists, and an adjustment means for adjusting a determination standard value used in the determination by the fire determination means according to the type of smoke identified by the identification means, and the fire determination means determines whether or not a fire exists based on the determination standard value adjusted by the adjustment means.

[0100] The fire detection device of Supplementary Note 4 is the fire detection device of Supplementary Note 2 or 3, further comprising a recording control means for storing the determination result of the fire determination means as history information in a storage means of the fire detection device.

[0101] Further, the fire detection device of Supplementary Note 5 is a fire detection device according to any one of Supplementary Notes 1 to 4, wherein the types of smoke include smoke from a flaming fire, smoke from a smoldering fire, smoke generated artificially, and steam.

[0102] Further, the fire detection device of Supplementary Note 6 is a fire detection device according to any one of Supplementary Notes 1 to 5, further comprising a fault determination means for determining whether or not there is a fault in the first light-emitting means or the second light-emitting means, and a notification means for notifying the result of the determination by the fault determination means.

[0103] (Effect of supplementary notes) The fire detection device described in Appendix 1 includes a light-receiving means for receiving first detection light irradiated from a first light-emitting means that is scattered by smoke and outputting a first light-receiving signal corresponding to the received scattered light, and a second detection light irradiated from a second light-emitting means that is scattered by smoke and outputting a second light-receiving signal corresponding to the received scattered light, and an identification means for identifying the type of smoke in the detection space based on the output ratio between the output value of the first light-receiving signal and the output value of the second light-receiving signal output from the light-receiving means and the rate of increase of the output value of the first light-receiving signal or the second light-receiving signal. This makes it possible to identify the type of smoke in more detail (particularly, to accurately identify smoke from a flaming fire and smoke generated artificially) than conventional technology (technology that identifies the type of smoke based only on the ratio of the output values ​​of two light-receiving signals). Therefore, fires can be accurately detected based on the type of smoke, improving the accuracy of fire detection.

[0104] The fire detection device described in Appendix 2 is equipped with an adjustment means for adjusting the output value of the first light receiving signal or the output value of the second light receiving signal according to the type of smoke identified by the identification means, and a fire determination means for determining the presence or absence of a fire based on the output value of the first light receiving signal or the output value of the second light receiving signal adjusted by the adjustment means.Therefore, the presence or absence of a fire can be determined based on the output value of the first light receiving signal or the output value of the second light receiving signal adjusted by the adjustment means, making it possible to more accurately detect fires based on the type of smoke.

[0105] According to the fire detection device described in Appendix 3, the fire judgment means judges whether or not a fire exists based on the judgment standard value adjusted by the adjustment means, so that the presence or absence of a fire can be judged based on the judgment standard value adjusted by the adjustment means, making it possible to more accurately detect fires based on the type of smoke.

[0106] According to the fire detection device described in Appendix 4, a recording control means is provided for storing the judgment result of the fire judgment means as historical information in the memory means of the fire detection device, so that the judgment result of the fire judgment means can be recorded as historical information, enabling the user to understand, for example, how a false alarm was made.

[0107] According to the fire detection device described in Appendix 5, the types of smoke include smoke from flaming fires, smoke from smoldering fires, artificially generated smoke, and steam, so it is possible to identify the types of smoke as smoke from flaming fires, smoke from smoldering fires, artificially generated smoke, and steam, making it possible to identify the types of smoke in more detail.

[0108] The fire detection device described in Appendix 6 is equipped with a failure determination means for determining whether or not there is a failure in the first light-emitting means or the second light-emitting means, and a notification means for notifying the result of the determination by the failure determination means, so that the result of the determination by the failure determination means can be notified and the user can take measures against the failure of the first light-emitting means or the second light-emitting means. [Explanation of symbols]

[0109] 1. Fire detection equipment 2 Installation surface 10 Mounting base 20 Outer cover 21 Outer cover body 22 Top section 22a display hole 23 First rib section 24 Second rib section 30 Inner cover 30a 1st opening 40 Inflow space 50 Insect net 60 Detection Space 70 Detector cover 70a 2nd opening 80 Detector body 90 Terminal board 91 Mounting material 100 boards 101 First light-emitting part 102 Second light-emitting part 103 Light receiving part 104 Display section 104a Light Guide 105 Communications Department 106 Power supply section 107 Control Unit 107a Specific part 107b Adjustment section 107c Fire detection section 107d Recording control section 107e Failure determination section 107f Notification Department 108 Storage section

Claims

1. 1. A smoke type identification method for identifying a type of smoke in a monitored area, comprising: a light irradiation step of irradiating the smoke with first detection light and second detection light having a wavelength different from that of the first detection light; a light receiving step of receiving first scattered light generated by scattering of the first detection light irradiated by the smoke in the light irradiating step, and outputting a first light receiving signal corresponding to the received first scattered light, and receiving second scattered light generated by scattering of the second detection light irradiated by the smoke in the light irradiating step, and outputting a second light receiving signal corresponding to the received second scattered light; a calculation step of calculating an output ratio between the output value of the first light receiving signal and the output value of the second light receiving signal output in the light receiving step, and a rate of increase in the output value of the first light receiving signal or the second light receiving signal; an identifying step of identifying the type of smoke corresponding to the output ratio and the rate of rise calculated in the calculating step from among the types of smoke pre-assigned in accordance with the combination of the output ratio and the rate of rise; A method for identifying smoke types, including:

2. a determination step of determining whether or not the smoke is caused by a fire occurring in the monitoring area based on the type of smoke identified in the identification step; The method for identifying smoke types according to claim 1 .

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