Fire alarm equipment and receivers

Abstract

To provide a fire warning facility and a receiver for performing appropriate fire monitoring by utilizing a smoke identification function and non-fire prevention function of a photoelectric smoke detector connected to a signal line from the receiver, so as to identify an event including a fire.SOLUTION: A receiver of a fire warning facility includes a map display section which identifies a white smoke fire, a black smoke fire, and a non-fire as an event of a predetermined warning area by connecting a photoelectric smoke detector and displays a map of the warning area where an event occurrence place is indicated when the event is identified. Then, displaying is performed, such as displaying of a warning issuance order display section 122 for displaying a list of the events whose occurrence is identified at a place displayed on the map in accordance with the place, displaying of a whole map 126-1 and a detailed map 128-1 as the map, and displaying of a symbol (fire mark 85 or the like) for enabling recognition of the type of the event when a user visually recognizes the map.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a fire alarm system and a receiver that identify a plurality of types of predetermined events, including a fire occurring in a predetermined alert area, by connecting a predetermined terminal device to the receiver. [Background technology]

[0002] Conventionally, in the fire alarm system known as the R type, fire detectors with transmission functions and unique addresses set are connected to the signal line drawn from the receiver, and in the normal monitoring state, the detection values ​​of smoke concentration, temperature, etc. are collected and monitored by calling the fire detectors whose detector addresses are sequentially specified. In the event of a fire, a search command is issued from the receiver based on a fire interrupt signal from the fire detector to identify the address of the fire detector that triggered the alarm and collect the detection values. If the detection value exceeds a specified fire alarm threshold, it is determined to be a fire and a fire alarm is output, and further, linked control is performed for the exhaust system, fire doors, fire extinguishing system, automatic reporting to firefighting authorities, etc.

[0003] In addition, conventional fire alarm systems use photoelectric smoke detectors to detect smoke caused by fires. However, conventional photoelectric smoke detectors can also give false fire alarms due to smoke from cooking or steam in the bathroom, not just smoke caused by fires.

[0004] In order to prevent false fire alarms due to causes other than fire, a so-called two-wavelength photoelectric smoke detector has been proposed (Patent Document 2), which shines light of two different wavelengths into the smoke detection space and determines the ratio of the light intensities of the different wavelengths of the light scattered by the smoke to determine the type of smoke, thereby improving the accuracy of smoke identification and ensuring the prevention of false fire alarms. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2007-265353 A [Patent Document 2] JP 2004-325211 A [Patent Document 3] Japanese Patent Application Publication No. 08-016947 [Patent Document 4] JP 2001-273570 A [Patent Document 5] Japanese Patent Application Publication No. 10-172086 [Patent Document 6] JP 2005-115797 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, while it is mentioned that such conventional two-wavelength photoelectric smoke detectors can identify the type of smoke caused by a fire and ensure the prevention of false fire alarms, there is no mention of what kind of fire monitoring control or interlocking control should be performed using the photoelectric smoke detector's fire smoke identification and non-fire prevention functions when actually connecting it to a receiver to monitor for fires, or what kind of signals should be sent and received between the receiver and the two-wavelength photoelectric smoke detector to perform fire monitoring and control while preventing false fire alarms.As a result, the construction of a new fire alarm system in which a two-wavelength photoelectric smoke detector is connected to the signal line from the receiver remains a new challenge.

[0007] The object of the present invention is to provide a fire alarm system and receiver that utilizes the smoke discrimination function and non-fire prevention function of a photoelectric smoke detector connected to a signal line from a receiver to identify events including fires and enable appropriate fire monitoring. [Means for solving the problem]

[0011] (Fire alarm system: Map display that makes it possible to recognize the event that has occurred) The present invention relates to a fire alarm system that can identify a plurality of types of predetermined events, including a fire occurring in a predetermined alert area, by connecting a predetermined terminal device to a receiver. And , A map display unit is provided for displaying a map of the alert zone, When a predetermined event is identified, a map of a warning area showing the predetermined event and the location where the predetermined event occurred can be displayed on the map display unit; the map displayed on the map display unit when a predetermined event is identified includes an overall map showing the entirety of the alert zone and a detailed map showing a part of the alert zone near the location where the predetermined event has occurred; A predetermined section in which the location where the predetermined event occurred is identifiably displayed on the overall map and the detailed map, thereby indicating the location where the predetermined event occurred; By displaying a specific section identifiably displayed on a detailed map in a different color for each type of event and displaying a symbol mark corresponding to the identified event in the specific section, Users can now recognize the type of event when viewing a map Indicates the specified event It is characterized by:

[0012] (Symbol) A display unit that functions as an alarm display unit that notifies the user of a recognized event and a map display unit; the display unit is capable of switching between displaying as an alarm display unit and displaying as a map display unit when a predetermined event is identified; The symbol mark displayed on the detailed map in the map display section is an alert Display section The symbol mark is the same as the symbol mark corresponding to a specific event that is displayed on the

[0017] (Receiver: Map display that makes it possible to recognize the event that occurred) The present invention relates to a receiver that is connected to a predetermined terminal device and identifies a plurality of types of predetermined events, including a fire occurring in a predetermined alert area, An alarm display unit that notifies the user of the identified event; Map display showing the restricted area map A display that functions as Equipped with the display unit is capable of switching between displaying as an alarm display unit and displaying as a map display unit when a predetermined event is identified; When a predetermined event is identified, a map of a warning area showing the predetermined event and the location where the predetermined event occurred can be displayed on the map display unit; the map displayed on the map display unit when a predetermined event is identified includes an overall map showing the entirety of the alert zone and a detailed map showing a part of the alert zone near the location where the predetermined event has occurred; A predetermined section in which the location where the predetermined event occurred is identifiably displayed on the overall map and the detailed map, thereby indicating the location where the predetermined event occurred; By displaying a specific section identifiably displayed on a detailed map in a different color for each type of event and displaying a symbol mark corresponding to the identified event in the specific section, the specific event is displayed so that the user can recognize the type of event when viewing the map. death, The symbol mark displayed on the detailed map of the map display section is the same as the symbol mark corresponding to a specific event displayed on the warning display section. It is characterized by: Effect of the Invention

[0018] (Fire alarm system: Effect of displaying a map together with a list of events) The present invention relates to a fire alarm system that connects a specified terminal device to a receiver and identifies multiple types of specified events, including fires that have occurred in specified alert areas.The system is equipped with a map display unit that displays a map of the alert area, and when a specified event is identified, a map of the alert area showing the location where the specified event occurred can be displayed on the map display unit.Depending on the location displayed on the map, a list of the specified events that have occurred and been identified at that location is displayed.As a result, the location of the event can be easily recognized from the displayed map, and the event that has occurred can be easily recognized from the list of events, making it possible to appropriately and easily monitor occurring events and take any necessary measures.

[0019] (Fire alarm system: Effect of displaying overall map and detailed map) The present invention relates to a fire alarm system that connects a specified terminal device to a receiver and identifies multiple types of specified events, including fires that have occurred in specified alert areas.The system is equipped with a map display unit that displays a map of the alert area, and when a specified event is identified, a map of the alert area showing the location where the specified event occurred can be displayed on the map display unit.When a specified event is identified, the map displayed on the map display unit includes an overall map showing the entire alert area and a detailed map showing the area where the specified event occurred.This makes it easy to identify the location of the event, and enables events that have occurred to be monitored appropriately and easily, and necessary measures to be taken.

[0020] (Compartment highlighting effect) Furthermore, when a specified event is identified, the overall map and detailed map displayed on the map display unit highlight the specified block in which the specified event occurred, making it even easier to identify the location where the event occurred.

[0021] (Fire alarm system: The effect of map display that makes it possible to recognize an event that has occurred) The present invention relates to a fire alarm system that connects a specified terminal device to a receiver and identifies multiple types of specified events, including a fire that has occurred in a specified alert area.The system is equipped with a map display unit that displays a map of the alert area, and when a specified event is identified, a map of the alert area showing the specified event and the location where the specified event occurred can be displayed on the map display unit.When a specified event is identified, the specified event displayed on the map displayed on the map display unit is displayed in a way that allows the user to recognize the type of event when they view the map.As a result, the location of the event and the event that has occurred can be easily recognized from the displayed map, making it possible to appropriately and easily monitor the event that has occurred and take any necessary measures.

[0022] (Effect of display according to the risk of identified events) The identified specific events are displayed on the map display unit in a manner according to the degree of danger for each type of specific event, so that the degree of danger of the event that has occurred can be easily recognized from the displayed map, enabling necessary measures to be taken.

[0023] (Receiver effect) The present invention relates to a receiver that is connected to a specified terminal device and identifies a plurality of types of specified events including a fire that has occurred in a specified restricted area, and is provided with a map display unit that displays a map of the restricted area, and when a specified event is identified, a map of the restricted area indicating the location where the specified event has occurred can be displayed on the map display unit. For a fire as a specified event, the type of event is further identified as being a white smoke fire or a black smoke fire, and based on the identification result, the map display unit displays whether the type of event is a white smoke fire or a black smoke fire so that when a user visually checks the map, the location of the event and the event that has occurred can be easily recognized from the displayed map, making it possible to appropriately and easily monitor the event that has occurred and take any necessary measures. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is an explanatory diagram showing an embodiment of a fire alarm system. [Diagram 2] Block diagram showing the circuit configuration of the photoelectric smoke detector installed in the fire alarm system shown in Figure 1. [Diagram 3] FIG. 3 is an explanatory diagram showing an embodiment of the structure of the smoke detector in FIG. 2. [Figure 4] A diagram showing the smoke concentration detection value and its ratio detected by the smoke detector structure of Figure 3 for the smoke when a cotton wick and kerosene are burned. [Diagram 5] Illustration showing the white smoke fire alarm screen [Figure 6] Illustration showing the map screen of the white smoke fire [Figure 7] Illustration showing the black smoke fire warning screen [Figure 8] Illustration showing the map screen of the black smoke fire [Figure 9] An explanatory diagram showing a non-fire warning screen [Figure 10] Illustration showing the map screen for non-fire causes [Figure 11] 1 is a flowchart showing a first embodiment of a control operation in the receiver of FIG. [Figure 12]3 is a flowchart showing a first embodiment of a control operation in the photoelectric smoke detector of FIG. 2. [Figure 13] 2 is a flowchart showing a second embodiment of the control operation in the receiver of FIG. 1. [Figure 14] 2. A flowchart showing a second embodiment of the control operation in the photoelectric smoke detector of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] [Fire alarm system] (Fire alarm system overview) Fig. 1 is an explanatory diagram showing an embodiment of a fire alarm system. As shown in Fig. 1, for example, an R-type receiver 10 is installed in a monitoring center or a manager's room of a facility where the fire alarm system is installed, and signal lines 12-1 to 12-3 are drawn from the receiver 10 to the alert area in separate systems.

[0026] A plurality of photoelectric smoke detectors 14 each having a transmission function and each having a unique address set thereto are connected to the signal line 12-1. The photoelectric smoke detectors 14 are so-called dual-wavelength photoelectric smoke detectors having the function of detecting a first smoke concentration detection value A1 by receiving light having a first wavelength λ1 and scattered light from smoke at a first scattering angle θ1, and detecting a second smoke concentration detection value A2 by receiving light having a second wavelength λ2 and scattered light from smoke at a second scattering angle θ2.

[0027] Here, in the following description, the first smoke density detection value A1 and the second smoke density detection value A2 may simply be referred to as the smoke density detection value A1 and the smoke density detection value A2.

[0028] In addition to the so-called two-wavelength photoelectric smoke detector 14, ordinary photoelectric smoke detectors and heat detectors equipped with a transmission function are also connected to the signal line 12-1, and on-off type fire detectors and transmitters are connected to the detector line drawn from the repeater equipped with a transmission function, but are not shown in the figure.

[0029] Control equipment such as a local sound system 18, an exhaust system (smoke exhaust system) 20, a fire door 22, and a fire extinguishing system 24 are connected to the signal lines 12-2 and 12-3 via a repeater 16 having a transmission function and a unique address set thereto.

[0030] The local acoustic device 18, under the control of the receiver 10, outputs a specified local acoustic alarm to notify the outbreak of a fire in a warning area. In this embodiment, if the receiver 10 recognizes a white smoke fire, it outputs a local acoustic alarm including a message urging people to check the scene, and if the receiver 10 identifies a black smoke fire, it outputs a local acoustic alarm including a message urging people to evacuate.

[0031] The exhaust device 20 is activated by a control command from the receiver 10 to ventilate the restricted area. The fire door 22 is latched open by a control command from the receiver 10 and is operated to the closed position, closing off the compartment where the fire has occurred and preventing the spread of the fire.

[0032] The fire extinguishing device 24 is activated by a control command from the receiver 10, and releases fire extinguishing water or a fire extinguishing agent to extinguish the fire. The fire extinguishing device 24 includes, for example, a dry-type sprinkler fire extinguishing system, and is driven to open a simultaneous release valve in response to a control command from the receiver 10 to spray fire extinguishing water from an open-type head.

[0033] In addition to the control equipment such as the local sound device 18, exhaust device 20, fire door 22, and fire extinguishing device 24 connected to the signal lines 12-2 and 12-3, an emergency broadcast device 26 and an automatic reporting device 30 are also connected to the receiver 10.

[0034] The emergency broadcast device 26 is operated by a transmission signal from the receiver 10, and outputs an emergency broadcast from a speaker 28 installed in the alert area to notify of a fire outbreak and to guide people to evacuate. When the emergency broadcast device 26 is activated, the local sound alarm from the local sound device 18 is stopped.

[0035] The automatic reporting device 30 is operated by a signal transmitted from the receiver 10, and makes a 119 call connection to a fire department via a public telephone line 32 to report the occurrence of a fire.

[0036] The maximum number of addresses set for each line in terminal devices such as photoelectric smoke detectors 14 and repeaters 16 connected to signal lines 12-1 to 12-3 is, for example, 255, and a maximum of 255 terminal devices can be connected to each of signal lines 12-1 to 12-3.

[0037] (Receiver functional configuration) The receiver 10 is provided with a main CPU 36 and sub-CPU boards 38-1 to 38-3, and each of the sub-CPU boards 38-1 to 38-3 is provided with a sub-CPU 40 and a transmission unit 42. The main CPU 36 and the sub-CPU 40 are connected by a serial transfer bus 44, and transmit and receive data between them.

[0038] Connected to the main CPU 36 are a display 46 with a touch panel using an LCD panel or the like, a display unit 48 provided with representative lights for fire, gas leaks, and faults, LED indicator lights, etc., an operation unit 50 provided with various switches necessary for fire monitoring, such as a fire determination switch, a district audio stop switch, and a report transfer stop switch, an audio alarm unit 52 provided with a speaker, and a report transfer unit 54.

[0039] The main CPU 36 is provided with a fire alarm control unit 58, an interlocking control unit 60, and a history processing unit 61 as functions realized by executing a program.

[0040] The sub-CPUs 40 of the sub-CPU boards 38-1 to 38-3 are provided with a transmission control unit 56 as a function realized by executing a program, and the transmission control unit 56 of the sub-CPU board 38-1 controls the collection of a first smoke density detection value A1 and a second smoke density detection value A2 detected by a two-wavelength photoelectric smoke detector 14 connected to the signal line 12-1.

[0041] In addition, the transmission control units 56 of the sub-CPU boards 38-2, 38-3 perform fire interlocking control by transmitting control signals specifying the addresses of the repeaters 16 that connect control devices such as the local sound equipment 18, exhaust equipment 20, fire doors 22, and fire extinguishing equipment 24 that are connected to the respective signal lines 12-2, 12-3.

[0042] (Control of collection of detector detection data) The transmission control unit 56 provided in the sub-CPU 40 of the sub-CPU board 38-1 controls the collection of detection data by instructing the transmission unit 42 to send and receive signals between the photoelectric smoke detector 14 connected to the signal line 12-1 in accordance with a predetermined communication protocol.

[0043] The downstream signal from the transmission unit 42 to the photoelectric smoke detector 14 is transmitted in voltage mode. This voltage mode signal is transmitted as a voltage pulse that changes the line voltage of the signal line 12-1 between, for example, 18 volts and 30 volts.

[0044] On the other hand, the upstream signal from the photoelectric smoke detector 14 to the transmission unit 42 is transmitted in current mode. In this current mode, a signal current is passed through the signal line 12-1 at the timing of bit 1 of the transmission data, and the upstream signal is transmitted to the receiver 10 as a so-called current pulse train.

[0045] During normal monitoring, the data collection control by the transmission control unit 56 of the sub-CPU 40 instructs the transmission unit 42 to transmit a broadcast batch AD conversion signal including a batch AD conversion command at regular intervals, and the photoelectric smoke detector 14 receiving this batch AD conversion signal converts the smoke density detection signals of the first smoke density detection value A1 and the second smoke density detection value A2 output from the smoke detection unit by AD conversion into digital smoke density detection value signals and holds them.

[0046] Next, the transmission control unit 56 of the sub-CPU 40 transmits a call signal including a polling command sequentially specifying the terminal addresses. When the photoelectric smoke detector 14 receives a call signal having an address that matches its own address, it transmits a call response signal indicating its own status to the receiver 10.

[0047] In addition, if the photoelectric smoke detector 14 is equivalent to a type 2 sensitivity smoke detector that alerts a fire at a smoke density of, for example, 10% / m, a smoke density threshold equivalent to type 1 sensitivity, for example a smoke density threshold of 5.0% / m, is set as a warning indication threshold AP1th for the first smoke density detection value A1 in the photoelectric smoke detector 14, and when the detected first smoke density detection value A1 becomes equal to or exceeds the warning indication threshold AP1th, it is determined that a fire has been alerted, and a fire interrupt signal is sent to the receiver 10.

[0048] In addition, a smoke density threshold equivalent to Class 1 sensitivity, for example a smoke density threshold of 5.0% / m, may be set as a warning indication threshold AP2th for the second smoke density detection value A2 in the photoelectric smoke detector 14, and when the detected second smoke density detection value A2 becomes equal to or exceeds the warning indication threshold AP2th, it is determined that a fire has been alerted and a fire interrupt signal is sent to the receiver 10.

[0049] When the transmission control unit 56 of the sub-CPU 40 receives a fire interrupt signal from the photoelectric smoke detector 14 via the transmission unit 42, it sends a group search command signal to identify the group including the photoelectric smoke detector 14 that triggered the fire, and then sends an intra-group search command signal to identify the address of the photoelectric smoke detector 14 that triggered the fire, and intensively collects the first and second smoke concentration detection values ​​A1, A2 and transmits them to the main CPU 36 via the serial transfer bus 44.

[0050] The intensive collection of the first and second smoke density detection values ​​A1, A2 by the transmission control unit 56 of the sub-CPU 40 shortens the transmission period of the batch AD conversion signal and continuously collects the first smoke density detection value A1 and the second smoke density detection value A2 of the photoelectric smoke detector 14 by transmitting a call signal specifying the address of the photoelectric smoke detector 14 that has alerted a fire after transmitting the batch AD conversion signal.

[0051] The fire alarm control unit 58 of the main CPU 36 calculates the ratio R = A1 / A2 from the first smoke density detection value A1 and the second smoke density detection value A2 received from the sub CPU 40, and compares it with a predetermined ratio threshold value Rth. When R ≥ Rth, a white smoke fire is discriminated, and when R < Rth, a black smoke fire is discriminated. The details of the discrimination between white smoke fires and black smoke fires by the fire alarm control unit 56 will be clarified in the later description of the photoelectric smoke detector 14.

[0052] The fire alarm control by the fire alarm control unit 58 turns on the fire representative lamp of the display unit 48, outputs a predetermined main sound alarm indicating the occurrence of a fire from the speaker of the acoustic alarm unit 52, and causes the display 46 to display fire alarm information including the location of the fire occurrence and the type information indicating whether it is a white smoke fire or a black smoke fire based on the detector address where the fire was detected.

[0053] When the white smoke fire is identified by the fire alarm control unit 58, the interlock control unit 60 of the main CPU 36 performs predetermined white smoke fire interlock control, and when the black smoke fire is identified, it performs predetermined black smoke fire interlock control.

[0054] The white smoke fire interlock control by the interlock control unit 60 transmits a district acoustic control signal designating the address of the district acoustic device 18 installed in the warning area corresponding to the address of the photoelectric smoke detector 14 that reported the fire (i.e., the address of the repeater 16 to which the district acoustic device 18 is connected), and activates the district acoustic device 18 with the designated address, thereby outputting a district acoustic alarm including a voice message prompting on-site confirmation by residents or the like because a white smoke fire is a fire that generates white smoke due to a smoldering fire in the initial stage of the fire.

[0055] The white smoke fire interlock control by the interlock control unit 60 transmits a control signal designating the address of the exhaust device 20 installed in the warning area corresponding to the address of the photoelectric smoke detector 14 that reported the fire (i.e., the address of the repeater 16 to which the exhaust device 20 is connected), and by activating the exhaust device 20, discharges the white smoke generated by the smoldering fire to the outside to perform ventilation.

[0056] On the other hand, the black smoke fire interlocking control by the interlocking control unit 60 activates the local sound device 18, the exhaust device 20, the fire doors 22, and the fire extinguishing device 24 by transmitting a control signal specifying the address of the repeater 16 to which each of the local sound device 18, the exhaust device 20, the fire doors 22, and the fire extinguishing device 24 is connected, which are installed in the alert area corresponding to the address of the photoelectric smoke detector 14 that has activated the fire.

[0057] The local sounding device 18 activates based on the identification of a black smoke fire to issue a local sounding alarm including a voice message encouraging residents to evacuate, since black smoke fires generate black smoke due to combustion and spread quickly, posing a high risk. In addition, the exhaust device 20 activates based on the identification of a black smoke fire to ventilate the compartment where the fire has occurred, the closing activation of the fire door 22 closes the compartment where the fire has occurred to prevent the fire from spreading, and the fire extinguishing device 24 activates to suppress the fire by spraying fire water, etc.

[0058] Furthermore, as a black smoke fire interlocking control, when the report transfer stop switch of the operation unit 50 is operated during operation to stop the report transfer, the interlocking control unit 60 of the main CPU 36 instructs the report transfer unit 54 to output a report transfer signal to the emergency broadcast device 26 and the automatic notification device 30 to perform interlocking control.

[0059] At this time, the emergency broadcast device 26 is activated by a transmission signal from the receiver 10, and issues an emergency broadcast from the speaker 28 installed in the alert area, notifying people of the occurrence of a fire and including a voice message encouraging evacuation. At this time, the interlocking control unit 60 sends a stop signal to the local sound device 18 to stop the output of the local sound alarm, ensuring that the emergency broadcast can be heard. In addition, the automatic reporting device 30 is activated by a transmission signal from the receiver 10, and automatically reports the occurrence of a fire to a firefighting agency by calling 119 using the public telephone line 32, requesting that the fire be extinguished.

[0060] The history processing unit 61 of the main CPU 36 stores in memory as history information fire events corresponding to white smoke fires or black smoke fires for which a fire alarm identified by the fire alarm control unit 58 has been output, and events of white smoke fire interlocking control and black smoke fire interlocking control by the interlocking control unit 60, and performs processing to read and store the history information in a portable storage medium such as a USB memory as necessary.

[0061] Therefore, based on the history information, which is a specific fire event in which white smoke fires and black smoke fires are distinguished and stored by the history processing unit 61, it is possible to trace the cause of the fire and analyze the progress of the fire with high accuracy.

[0062] [Photoelectric smoke detector] (Circuit configuration) Fig. 2 is a block diagram showing the circuit configuration of a photoelectric smoke detector provided in the fire alarm system of Fig. 1. As shown in Fig. 2, the photoelectric smoke detector 14 of this embodiment is composed of a detector control unit 62 composed of a computer circuit equipped with a CPU, memory, and various input / output ports, a transmission unit 64 that transmits and receives signals to and from the receiver 10 via a signal line 12 connected to an S terminal and an SC terminal, a power supply unit 66 that converts the power supply voltage supplied via the signal line 12 into a predetermined stabilized voltage and outputs it, a light emission drive unit 68, a smoke detection unit 70, and amplifier circuit units 74, 76.

[0063] The smoke detector 70 is provided with a light emitting element 78 that simultaneously emits light including a first wavelength λ1 and a second wavelength λ2. The light of the first wavelength λ1 emitted from the light emitting element 78 has a central wavelength set to 600 nm or more, and the light of the second wavelength λ2 has a central wavelength set to 500 nm or less, and in this embodiment, the first wavelength λ1 is set to, for example, 700 nm, and the second wavelength λ2 is set to, for example, 450 nm.

[0064] In this embodiment, a white LED (white light emitting diode) is used as the light emitting element 78. The white LED is, for example, a combination of a blue LED and a phosphor, and the light of the blue LED passes through the phosphor to emit white light, and this emitted light color includes light with a first wavelength λ1 = 700 nm and light with a second wavelength λ2 = 450 nm, and the light of the first wavelength λ1 and the light of the second wavelength λ2 can be simultaneously irradiated into the smoke detection unit 70.

[0065] In addition, a two-color LED (two-color light-emitting diode) can also be used as the light-emitting element 78 of this embodiment. The two-color LED includes a first light-emitting chip that emits light with a first wavelength λ1=700 nm and a second light-emitting chip that emits light with a second wavelength λ2=450 nm, and by driving both of them simultaneously, the light with the first wavelength λ1 and the second wavelength λ2 can be irradiated simultaneously into the smoke detection unit 70.

[0066] The first light receiving element 80 uses a photodiode (PD) sensitive to a first wavelength λ1, and the second light receiving element 82 uses a photodiode (PD) sensitive to a second wavelength λ2.

[0067] In addition, the first light receiving element 80 and the second light receiving element 82 may be a wideband photodiode sensitive to the visible light wavelength band, with a filter layer that receives only the wavelength bands of the first wavelength λ1 and the second wavelength λ2 provided in a PD molding (transparent cover member), or a filter that transmits the wavelength bands of the first wavelength λ1 and the second wavelength λ2 may be disposed in front of the wideband photodiode.

[0068] The amplifier circuit section 74 amplifies the received light signal of the smoke scattered light of the first wavelength λ1 received by the first light receiving element 80, and outputs the received light signal which becomes the first smoke density detection value A1 to the sensor control section 62. In addition, the amplifier circuit section 76 amplifies the received light signal of the smoke scattered light received by the second light receiving element 82, and outputs the received light signal which becomes the second smoke density detection value A2 to the sensor control section 62.

[0069] (Smoke Detection Division) Fig. 3 is an explanatory diagram showing an embodiment of the structure of the smoke detection unit in Fig. 2. As shown in Fig. 3, a light emitting element 78, a first light receiving element 80 and a second light receiving element 82 are arranged in a smoke detection unit 70 into which smoke from the outside flows.

[0070] For example, a light-emitting element 78 using a white LED irradiates light including a first wavelength λ1 and a second wavelength λ2 in the direction of an optical axis 78a, and as described above, the light of the first wavelength λ1 is set to 700 nm, and the light of the second wavelength λ2 is set to 450 nm.

[0071] The first scattering angle θ1 formed by the intersection of the optical axis 78a of the light-emitting element 78 and the optical axis 80a of the first light-receiving element 80 is set to the range of 20° to 70°, and the light-emitting element 78 is arranged so that the optical axis 78a of the light-emitting element 78 and the optical axis 80a of the first light-receiving element 80 intersect at a predetermined angle in the range of 110° to 160°.

[0072] In addition, the second scattering angle θ2 formed by the intersection of the optical axis 78a of the light-emitting element 78 and the optical axis 82a of the second light-receiving element 82 is set to the range of 110° to 150°, and the light-emitting element 78 and the optical axis 82a of the second light-receiving element 82 are arranged so that they intersect at a predetermined angle in the range of 30° to 70°.

[0073] In this embodiment, the first scattering angle θ1 is set to 30°, and therefore the optical axis 78a of the light-emitting element 78 and the optical axis 80a of the first light-receiving element 80 are arranged to intersect at a crossing angle of, for example, 150°, and the second scattering angle θ2 is set to 120°, and therefore the optical axis 78a of the light-emitting element 78 and the optical axis 82a of the second light-receiving element 82 are arranged to intersect at a crossing angle of, for example, 60°.

[0074] Since the first light receiving element 80 is sensitive to light of the first wavelength λ1 = 700 nm emitted from the light emitting element 78, when the light emitting element 78 emits light of the first wavelength λ1, the scattered light at a scattering angle θ1 = 30° by the smoke flowing into the smoke detection unit 70 is received by the first light receiving element 80, and a first smoke concentration detection value A1 is obtained.

[0075] In addition, since the second light receiving element 82 is sensitive to light of the second wavelength λ2 = 450 nm emitted from the light emitting element 78, when the light emitting element 78 emits light of the second wavelength λ2 simultaneously with light of the first wavelength λ1, the scattered light at the second scattering angle θ2 = 120° by the smoke flowing into the smoke detection unit 70 is received by the second light receiving element 82, and a second smoke concentration detection value A2 is obtained at the same time.

[0076] When the sensor control unit 62 shown in FIG. 2 receives a batch AD converted signal from the receiver 10 via the transmission unit 64, it instructs the light emitting drive unit 68 to drive the light emitting element 78 to emit white light including a first wavelength λ1 and a second wavelength λ2, and the backscattered light having a first scattering angle θ1=30° due to the first wavelength λ1 is received by the first light receiving element 80. In response to this, the first smoke concentration detection signal A1 output from the amplifier circuit unit 74 is AD converted to digital data, read in, and stored in memory.

[0077] At the same time, since the backscattered light with the second wavelength λ2 and the second scattering angle θ2 = 120° is received by the second light receiving element 82, the sensor control unit 62 AD converts the second smoke concentration detection signal A2 output from the amplifier circuit unit 76 in response to the light received by the second light receiving element 82 into digital data, reads it in, and stores it in memory.

[0078] Next, the detector control unit 62 compares the first smoke density detection value A1 stored in memory with a warning indication threshold AP1th that is predetermined in accordance with the set sensitivity of the photoelectric smoke detector 14, and determines that a fire has been alerted if the first smoke density detection value A is equal to or greater than the warning indication threshold AP1th, and instructs the transmission unit 64 to transmit a fire interrupt signal to the receiver 10.

[0079] Here, as described above, when the photoelectric smoke detector 14 is equivalent to a Class 2 sensitivity with a fire alarm threshold A1th of 10% / m, the warning display threshold AP1th is set to, for example, AP1th=5% / m, which is equivalent to Class 1 sensitivity. Also, when the photoelectric smoke detector 14 is equivalent to a Class 3 sensitivity with a fire alarm threshold A1th of 15% / m, the warning display threshold AP1th is set to, for example, AP1th=10% / m, which is equivalent to Class 2 sensitivity.

[0080] (Distinguishing between white and black smoke fires) FIG. 4 is an explanatory diagram showing smoke concentration detection values ​​and their ratios detected by the smoke detector structure of FIG. 3 for smoke when a cotton wick and kerosene are burned.

[0081] As shown in Figure 4, the first smoke concentration detection value A1 is the received output of scattered light with a first wavelength λ1 = 700 nm and a first scattering angle θ1 = 30°, and the second smoke concentration detection value A2 is the received output of scattered light with a second wavelength λ2 = 450 nm and a second scattering angle θ2 = 120°.

[0082] If the ratio R=A1 / A2 of the first and second smoke concentration detection values ​​A1, A2 measured when burning such a cotton wick and kerosene is taken, then in the case of cotton wick, R=8.0 and in the case of kerosene, R=2.3, which shows a significant difference in the ratio R between the cotton wick and kerosene, making it possible to identify the type of smoke based on the ratio R.

[0083] For this reason, a ratio threshold value Rth for identifying the type of smoke can be set to, for example, Rth = 5, and if R ≥ 5, it can be determined to be a white smoke fire where white smoke is generated by smoldering, and if R < 5, it can be determined to be a black smoke fire where black smoke is generated by combustion.

[0084] In this embodiment, the receiver 10 shown in FIG. 1 collects the first and second smoke density detection values ​​A1, A2 detected by the photoelectric smoke detector 14 that has activated a fire alarm, and the fire alarm control unit 58 calculates the ratio R=A1 / A2 of the smoke density detection values ​​A1, A2, and if R≧5, determines that the fire is a white smoke fire where white smoke is generated by smoldering, and if R<5, determines that the fire is a black smoke fire where black smoke is generated by combustion.

[0085] In addition, when the fire alarm control unit 58 of the receiver 10 determines that there is a white smoke fire based on the first smoke density detection values ​​A1, A2, it determines that there is a confirmed fire if the first smoke density detection value A1 is equal to or higher than the fire alarm threshold A1th corresponding to a smoke density of 10% / m for type 2 sensitivity, and performs control to output a fire alarm including information indicating a white smoke fire.

[0086] Similarly, when the fire alarm control unit 58 of the receiver 10 judges that a black smoke fire has occurred based on the first smoke density detection values ​​A1 and A2, it judges that a fire has been confirmed if the second smoke density detection value A2 is equal to or greater than the fire alarm threshold A2th corresponding to a smoke density of 10% / m for class 2 sensitivity, and performs control to output a fire alarm including information indicating a black smoke fire. Note that the above-mentioned judgment of whether a fire has been confirmed is omitted in the control operation of the receiver 10 in Figs. 11 and 13 described later.

[0087] (Non-fire cause identification) When a non-fire cause, such as steam from a bathroom, flows into the smoke detection unit 70 of the photoelectric smoke detector 14 shown in FIG. 3, the ratio R of the first and second smoke concentration detection values ​​A1, A2 will be a large value, such as exceeding R=10.

[0088] For this reason, a non-fire cause threshold value RSth for identifying steam is set to, for example, RSth=12, and if R≧12, it is identified as a non-fire cause such as steam.

[0089] The fire alarm control unit 58 of the receiver 10 also judges whether a non-fire factor has occurred based on the ratio R of the first and second smoke concentration detection values ​​A1, A2. If R is greater than or equal to 12, it judges that a non-fire factor such as steam has occurred, and performs control to output a caution alarm indicating the occurrence of a non-fire factor such as steam, rather than a fire alarm.

[0090] [Fire alarm display] (White smoke fire alarm display) FIG. 5 is an explanatory diagram showing a white smoke fire warning screen, and FIG. 6 is an explanatory diagram showing a white smoke fire map screen.

[0091] 5, when a white smoke fire is identified, a white smoke fire alarm screen 84-1 is displayed on the display 46. The white smoke fire alarm screen 84-1 has a fire mark 85 and a fire representative display section 86 arranged at the top of the screen, followed by a district display section 88 arranged in a frame below, followed by a guidance display section 92, followed by a main sound stop button 94 and a forward button 96. In addition to this, for example, a type display section 90-1 is arranged in the district display section 88, and the words "white smoke fire (smoking fire)" are displayed.

[0092] Next, an interlocking display 98-1 is arranged, and the interlocking display 98-1 displays, as interlocking contents, a local acoustic alarm sounding 100 and an exhaust device operation 102, which indicate interlocking controls that have been activated in response to the identification of a white smoke fire.

[0093] Furthermore, when the advance button 96 on the white smoke fire alarm screen 84-1 in Fig. 5 is touched with a fingertip or the like, the screen is switched to a white smoke fire map screen 120-1 shown in Fig. 6. On the white smoke fire map screen 120-1 in Fig. 6, an alarm order display section 122 is provided at the top of the screen, and the first line displays the first fire alarm along with the area where the fire occurred, and further, the type display section 124-1 indicates that it is a "white smoke fire."

[0094] In addition, the white smoke fire map screen 120-1 displays an overall map 126-1 and a detailed map 128-1 showing the location of the fire within the overall map, and the white smoke fire area 130-1 where the white smoke fire is occurring is displayed in yellow, for example, and a fire mark 85 is placed.

[0095] When a person in charge or the like looks at the white smoke fire alarm screen 84-1 displayed on the display 46 of the receiver 10 as shown in Figure 5, he or she can see that the fire for which a fire alarm has been issued is a white smoke fire, and also that it is a smoldering fire, and that the fire is in the early stages where white smoke is being generated by smoldering, and can then deal with the fire by confirming the site and carrying out initial extinguishing, etc.

[0096] Furthermore, by the person in charge or the like looking at the interlocking display 98-1, it can be confirmed that the interlocking control of the sounding of the local sound alarm 100 and the operation of the exhaust device 102 is being performed in conjunction with the white smoke fire alarm.

[0097] (Black smoke fire warning display) FIG. 7 is an explanatory diagram showing a black smoke fire warning screen, and FIG. 8 is an explanatory diagram showing a black smoke fire map screen.

[0098] 7, when a black smoke fire is identified, a black smoke fire alarm screen 84-2 is displayed on the display 46. On the black smoke fire alarm screen 84-2, the words "black smoke fire (combustion fire)" are displayed in a type display section 90-2 arranged in a district display section 88.

[0099] Additionally, the interlocking display 98-2 displays the interlocking contents, such as local sound alarm 100, exhaust system operation 102, fire door closing 104, fire extinguisher system operation 106, emergency broadcast 108, and automatic notification 110, which indicate the interlocking controls that were activated in response to the identification of a black smoke fire. Note that the local sound alarm 100 and emergency broadcast 108 are never performed simultaneously, and only one that is currently in operation is displayed. Other than that, it is the same as the white smoke fire alarm screen 84-1 in Fig. 5.

[0100] Furthermore, when the advance button 96 on the black smoke fire alarm screen 84-2 in FIG. 7 is touched with a fingertip or the like, the screen switches to the black smoke fire map screen 120-2 shown in FIG. 8, and the black smoke fire map screen 120-2 indicates a "black smoke fire" in the alarm order display section 122, and below that, an overall map 126-2 and a detailed map 128-2 showing the location of the fire within the overall map are displayed, and the black smoke fire area 130-2 where the black smoke fire is occurring is displayed in red, for example, to indicate a high level of danger. Other than that, the screen is the same as the white smoke fire map screen 120-1 in FIG. 6.

[0101] When a person in charge or the like looks at the black smoke fire alarm screen 84-2 displayed on the display 46 of the receiver 10 as shown in FIG. 7 , he or she can see that the fire for which a fire alarm has been issued is a black smoke fire, and also that it is a combustion fire, and that the fire is generating black smoke due to combustion and is a fast-spreading, highly dangerous fire, etc., and can then confirm the location of the fire and deal with it by providing evacuation guidance or reporting the fire to the fire department, etc.

[0102] Furthermore, by having the person in charge or the like look at the interlocking display 98-2, it is possible to see that in addition to the interlocking control of the district sound alarm sounding 100 and the exhaust system activation 102 in response to the black smoke fire alarm, the fire doors are closed 104, the fire extinguisher is activated 106, an emergency broadcast is being made 108, and an automatic report is made 110 as part of the fire interlocking, and it is possible to confirm that the necessary interlocking controls are being performed in response to the identification of a black smoke fire.

[0103] (Non-fire warning warning display) FIG. 9 is an explanatory diagram showing a non-fire caution alarm screen, and FIG. 10 is an explanatory diagram showing a map screen of non-fire causes.

[0104] 9, when a non-fire cause such as steam is identified, a non-fire cause warning screen 84-3 is displayed on the display 46. The non-fire cause warning screen 84-3 has a non-fire mark 132 and a non-fire representative display section 114 arranged at the top of the screen, followed by a type display section 90-3 arranged in the area display section 88 within the frame below, with the words "Non-fire cause steam" displayed.

[0105] Next, a guidance display section 116 is arranged, which displays the guidance "This is not a fire alarm. Please pay attention," and below that, a main sound stop button 94 and a forward button 96 are arranged.

[0106] Next, the interlocking display 98-3 displays, as the interlocking control activated in response to the identification of a non-fire cause, for example, an intercom call 118 as the interlocking content. When the facility in which the fire alarm system is installed is an apartment building, there may be an intercom system installed that allows communication between the manager's office and the residential area, and this intercom call 118 can be automatically made to the room in which the non-fire alarm has occurred in conjunction with the identification of a non-fire alarm to alert the occupants.

[0107] Furthermore, when the advance button 96 on the non-fire cause warning screen 84-3 in Fig. 9 is touched with a fingertip or the like, it switches to a non-fire map screen 120-3 shown in Fig. 10. On the non-fire map screen 120-3 in Fig. 10, an alarm order display section 122 is provided at the top of the screen, and the first non-fire alarm is displayed on the first line together with the area where the alarm occurred.

[0108] In addition, the non-fire cause map screen 120-3 displays an overall map 126-3 and a detailed map 128-3 showing the locations of non-fire cause occurrences within the overall map, and a non-fire cause occurrence section 130-3 where a non-fire cause such as steam is occurring is displayed in blue, for example, and a non-fire mark 132 is also placed.

[0109] When a disaster prevention officer or the like looks at the non-fire warning alarm screen 84-3 displayed on the display 46 of the receiver 10 as shown in Figure 9, he or she can see that steam is being generated as a non-fire cause in a room, etc. that has been the subject of a non-fire alert, and can contact the occupants of the rooms, etc. that are displayed in the area and warn them to be careful by calling an intercom through linked control.

[0110] Furthermore, if a resident does not respond to an intercom call, it is possible that the resident has gone out with the kettle still on, for example, so disaster prevention personnel must carefully monitor the progression of events. If the kettle overheats, the non-fire warning alarm may be followed by a white smoke fire alarm, in which case disaster prevention personnel can immediately prepare to take measures such as forcibly entering the room even if the resident is not present. The same is true for cases such as a cigarette continuing to smoke due to improper disposal in an ashtray, and a warning can be issued for events that "have not yet become a fire, but have the potential to become one."

[0111] [Fire monitoring and control of fire alarm equipment 1] Fig. 11 is a flow chart showing a first embodiment of the control operation in the receiver of Fig. 1, which is the control operation by the transmission control unit 56, the fire alarm control unit 58, and the interlocking control unit 60 shown in Fig. 1. Also, Fig. 12 is a flow chart showing a first embodiment of the control operation in the photoelectric smoke detector of Fig. 2, which is the control operation by the detector control unit 62. This embodiment is characterized in that the receiver 10 distinguishes between a white smoke fire, a black smoke fire, and a non-fire cause.

[0112] (Receiver control) As shown in FIG. 11, in step S1, the transmission control unit 56 of the receiver 10 transmits a broadcast batch AD conversion signal designating all photoelectric smoke detectors 14 to the signal line 12-1 at predetermined intervals, and AD converts the smoke concentration detection values ​​A1, A2, which are analog signals detected on the photoelectric smoke detector 14 side, into digital signals and stores them.

[0113] Next, in step S2, the transmission control unit 56 transmits a call signal sequentially addressing the addresses of the photoelectric smoke detectors 14, and in step S3, receives a call response signal transmitted by the photoelectric smoke detector 14 that received the call signal, and monitors the status of the photoelectric smoke detectors 14 to determine whether they are operating normally.

[0114] Next, the transmission control unit 56 determines whether or not a fire interrupt signal has been received from the photoelectric smoke detector 14 that has alerted a fire in step S4, and if it determines that a fire interrupt signal has been received, it proceeds to step S5 and searches for the address of the photoelectric smoke detector 14 that has alerted a fire and sent the fire interrupt signal by transmitting a group search command signal and an intra-group search command signal.

[0115] Next, the transmission control unit 56 proceeds to step S6, shortens the period of the batch AD conversion signal, and by sending a call signal specifying the address of the photoelectric smoke detector 14 that sent the fire interrupt signal, repeatedly acquires the first and second smoke concentration detection values ​​A1, A2 from the photoelectric smoke detector 14 that has issued a fire alert, and transmits them to the fire alarm control unit 58 of the main CPU 36.

[0116] The fire alarm control unit 58 calculates the ratio R = A1 / A2 of the first and second smoke density detection values A1 and A2 in step S7, compares it with the preset ratio threshold value Rth1 = 5 and the non-fire factor threshold value RSth = 12 based on FIG. 4 to discriminate the type. If 5 ≤ R ≤ 12, it proceeds to step S9 to identify a white smoke fire. If R < 5, it proceeds to step S12 to identify a black smoke fire. If 12 < R, it proceeds to step S15 to identify a non-fire caused by steam.

[0117] When the fire alarm control unit 58 identifies a white smoke fire in step S9, it proceeds to step S10 and outputs a fire alarm indicating a white smoke fire. That is, the fire alarm control unit 58 causes the acoustic alarm unit 52 to output a main acoustic alarm indicating a white smoke fire, drives the fire representative lamp of the display unit 48, and further causes the display 46 to display the white smoke fire alarm screen 84-1 shown in FIG. 5.

[0118] Subsequently, the interlock control unit 60 proceeds to step S11. As white smoke fire interlock control corresponding to the discrimination of a white smoke fire, it outputs a district acoustic alarm by transmitting a control signal designating the address of the district acoustic device 18 in the area corresponding to the address of the photoelectric smoke detector 14 that has detected the white smoke fire. Also, it performs control to start the exhaust device 20 for ventilation by transmitting a control signal designating the address of the exhaust device 20 corresponding to the address of the photoelectric smoke detector 14 that has detected the white smoke fire.

[0119] Also, when the fire alarm control unit 58 identifies a black smoke fire in step S12, it proceeds to step S13 and outputs a fire alarm indicating a black smoke fire. That is, the fire alarm control unit 58 causes the acoustic alarm unit 52 to output a main acoustic alarm indicating a black smoke fire, drives the fire representative lamp of the display unit 48, and further causes the display 46 to display the black smoke fire alarm screen 84-2 shown in FIG. 7.

[0120] Subsequently, the interlock control unit 60 proceeds to step S14. As black smoke fire interlock control corresponding to the discrimination of black smoke, it operates each of the district acoustic device 18, exhaust device 20, fire door 22, and fire extinguishing device 24 in the area corresponding to the address of the photoelectric smoke detector 14 that has detected the black smoke by transmitting a control signal designating their respective addresses.

[0121] Furthermore, when the report transfer stop is set by operating the report transfer stop switch of the operation unit 50 during operation, the interlocking control unit 60 instructs the report transfer unit 54 to output a report transfer signal to the emergency broadcast device 26 and the automatic notification device 30 to start them up and make an emergency broadcast and an automatic notification to a firefighting agency. When the emergency broadcast device 26 is started up, the operation of the local sound device 18 is stopped.

[0122] On the other hand, if the fire alarm control unit 58 determines in step S15 that there is no fire, the process proceeds to step S16, in which the audio alarm unit 52 outputs an audio caution alarm indicating a non-fire cause and activates the caution indicator light on the display unit 48, and further causes the display 46 to display the non-fire alarm caution alarm screen 84-3 shown in Figure 9.

[0123] Next, the interlocking control unit 60 proceeds to step S17, and as non-fire interlocking control corresponding to the identification of a non-fire, makes an intercom call to the room corresponding to the address of the photoelectric smoke detector 14 that has detected a non-fire, informs the user that a non-fire factor such as steam has occurred, and prompts the user to check.

[0124] Next, the fire alarm control unit 58 repeats the process from step S5 until it determines in step S18 that the fire has been restored.If it determines that the fire has been restored, then in step S19 it sends a fire restoration signal to the photoelectric smoke detector 14 to restore them, and if the local sound device 18, exhaust device 20, or fire extinguishing device 24 are in operation, it sends a stop control signal to stop them, and if the emergency broadcast device 26 is in operation, it outputs a transmission stop signal to stop the emergency broadcast, and then it returns to step S1 and repeats the control from step S1.

[0125] (Photoelectric smoke detector control) As shown in Figure 12, when the detector control unit 62 of the photoelectric smoke detector 14 shown in Figure 2 determines in step S21 that a batch AD conversion signal has been received from the receiver 10, it proceeds to step S22, and detects a smoke concentration detection value A1 detected by receiving light of the first wavelength λ1 and scattered light at the first scattering angle θ1, and a smoke concentration detection value A2 detected by receiving light of the second wavelength λ2 and scattered light at the second scattering angle θ2 by driving the light-emitting element 78 to emit light, and stores these in memory in step S23.

[0126] Next, when the sensor control unit 62 determines in step S24 that a call signal designating its own address has been received, the process proceeds to step S25 where it transmits a call response signal indicating the sensor status, thereby notifying the receiver 10 of its own status.

[0127] Next, the sensor control unit 62 proceeds to step S26. 、 The first smoke density detection value A1 is determined to be equal to or greater than the warning indication threshold AP1th. Or, the second smoke density detection value A2 is determined to be equal to or greater than the warning display threshold AP2th. This causes a fire alert, and the process proceeds to step S27, where a fire interrupt signal is sent to the receiver 10. Next, if it is determined in step S28 that a group search command and an intra-group search command have been received from the receiver 10, the process proceeds to step S29, where a search response signal indicating a fire alert is sent, thereby causing the receiver 10 to obtain the address of the photoelectric smoke detector 10 that alerted the fire.

[0128] Next, since the receiver 10 transmits a batch AD conversion signal and a call signal specifying the fire alarm address at short intervals, the detector control unit 62 determines in step S30 that it has received the batch AD conversion signal and the call signal, and proceeds to step S31, where it detects the first and second smoke density detection values ​​A1, A2 by driving the light emitting element 78 to emit light, and stores them in memory. In step S32, it transmits a call response signal including the smoke density detection values ​​A1, A2 to the receiver 10, which determines the ratio R of the smoke density detection values ​​A1, A2, and identifies whether the fire is a white smoke fire, a black smoke fire, or a non-fire cause, and outputs a fire alarm or a non-fire caution alarm.

[0129] Next, the sensor control unit 62 repeats the processing from step S30 until it determines in step S33 that a fire recovery signal has been received from the receiver 10, and when it determines that a fire recovery signal has been received, it returns to step S1 and repeats the same control operations.

[0130] [Fire monitoring and control of fire alarm equipment 2] Fig. 13 is a flowchart showing a second embodiment of the control operation in the receiver, which is the control operation by the transmission control unit 56, fire alarm control unit 58 and interlocking control unit 60 shown in Fig. 1. Fig. 14 is a flowchart showing a second embodiment of the control operation in a photoelectric smoke detector, which is the control operation by the detector control unit 62. This embodiment is characterized in that the photoelectric smoke detector 14 side distinguishes between a white smoke fire, a black smoke fire or a non-fire cause.

[0131] (Receiver control) As shown in FIG. 13, the processing of steps S41 to S45 by the transmission control unit 56 of the receiver 10 is the same as steps S1 to S5 in FIG. 11, and since the identification of a smoke fire, black smoke fire, or non-fire cause is performed on the photoelectric smoke detector 14 side, the processing corresponding to steps S6 and S7 in FIG. 11 is eliminated, and instead the transmission control unit 56 receives a call response signal indicating a white smoke fire, black smoke fire, or non-fire transmitted from the photoelectric smoke detector 14 in step S46, and identifies the type in step S47.

[0132] The processing of steps S48 to S56 by the fire alarm control unit 58 and the interlocking control unit 60 after the type is determined in step S47 is the same as the processing of steps S9 to S17 in Fig. 11, where a white smoke fire, a black smoke fire, or a non-fire is identified from the call response signal received from the photoelectric smoke detector 14, and if it is a white smoke fire, a white smoke fire alarm is output and white smoke fire interlocking control is performed, if it is a black smoke fire, a black smoke fire alarm is output and black smoke fire interlocking control is performed, and if it is a non-fire, a non-fire caution alarm is output and non-fire interlocking control is performed. Also, steps S57 and S58 in Fig. 13 are the same as steps S18 and S19 in Fig. 11.

[0133] (Photoelectric smoke detector control) As shown in FIG. 14, the processing of steps S61 to S71 by the detector control unit 62 of the photoelectric smoke detector 14 shown in FIG. 2 is the same as the processing of steps S21 to S31 in FIG. 12, and step S79 is the same as step S33 in FIG. 12. Since the photoelectric smoke detector 14 distinguishes between a white smoke fire, a black smoke fire, or a non-fire cause, steps S72 to S78 are processing specific to this embodiment.

[0134] That is, when the detector control unit 62 determines in step S70 that it has received from the receiver 10 a batch AD conversion signal with a shortened period and a call signal specifying the address of the detector that has triggered a fire alarm, it proceeds to step S71, and stores in memory a smoke concentration detection value A1 detected by receiving light of the first wavelength λ1 and scattered light at the first scattering angle θ1, and a smoke concentration detection value A2 detected by receiving light of the second wavelength λ2 and scattered light at the second scattering angle θ2.

[0135] Next, the detector control unit 62 proceeds to step S72, calculates the ratio R=A1 / A2 of the first and second smoke density detection values ​​A1, A2, compares it with a ratio threshold value R1th=5 set in advance based on Fig. 4, and identifies the fire as a white smoke fire if R≧5, and identifies the fire as a black smoke fire if R<5. Furthermore, the detector control unit 62 identifies a non-fire cause such as steam as a cause if the ratio R is equal to or greater than the non-fire cause threshold value RSth=12.

[0136] Next, the detector control unit 62 proceeds to steps S73 to S78, and transmits to the receiver 10 a call response signal including identification information of a white smoke fire, a black smoke fire, or a non-fire cause according to the identification result of step S72, and the first and second smoke density detection values ​​A1, A2, and performs control to output a white smoke fire alarm, a black smoke fire alarm, or a non-fire caution alarm through the processing of steps S46 to S56 on the receiver 10 side shown in FIG. 13, and corresponding linked control.

[0137] [Modifications of the present invention] (Photoelectric smoke detector) The above embodiment takes as an example a photoelectric smoke detector with a smoke detection section structure having one light-emitting element and two light-receiving elements, as shown in Figure 3, but is not limited to this, and any photoelectric smoke detector with a smoke detection section structure that can obtain first and second smoke concentration detection values ​​A1, A2 by setting different wavelengths and scattering angles may be used, for example, a photoelectric smoke detector with a smoke detection section structure having two light-emitting elements and one light-receiving element as shown in Patent Document 2.

[0138] In addition, in the above embodiment, when the photoelectric smoke detector receives a batch AD conversion signal from the receiver, it detects the first and second smoke density detection values ​​A1, A2 by driving the light-emitting element to emit light. However, the photoelectric smoke detector may itself detect the first and second smoke density detection values ​​A1, A2 by intermittently driving the light-emitting element to emit light at a predetermined cycle, regardless of instructions from the receiver.

[0139] (Alarm screen) The white smoke fire alarm screen, black smoke fire alarm screen, and non-fire warning alarm screen shown in the above embodiment are merely examples, and any appropriate display form can be adopted as necessary.

[0140] (Interlocking control) The white smoke fire-linked control, black smoke fire-linked control, and non-fire-linked control shown in the above embodiments are merely examples, and appropriate linked control can be used as necessary.

[0141] (P-type fire alarm system) The above embodiment takes as an example an R-type fire alarm system that monitors for fires by sending and receiving signals between a receiver and an addressed photoelectric smoke detector, but it may also be a P-type fire alarm system that, when the photoelectric smoke detector activates, sends a white smoke fire signal, a black smoke fire signal or a non-fire cause signal to the receiver without receiving instructions from the receiver, and outputs a white smoke fire alarm, a black smoke fire alarm, or a non-fire caution alarm.

[0142] In the presence of such P-type fire alarm equipment, a reporting current is passed through the signal line from the receiver by a photoelectric smoke detector to transmit a white smoke fire signal, a black smoke fire signal, or a non-fire factor signal to the receiver. However, in order to identify the white smoke fire signal, the black smoke fire signal, or the non-fire factor signal, a unique frequency signal or a pulse code signal is superimposed on the reporting current and passed through. In this way, the receiver can identify the smoke fire signal, the black smoke fire signal, or the non-fire factor signal and output a white smoke fire alarm, a black smoke fire alarm, or a non-fire caution alarm.

[0143] In addition, the interlocking control of control devices such as the area sound device, the exhaust device, and the fire extinguishing device in the P-type fire alarm equipment is P-type interlocking control performed on a line-by-line basis.

[0144] (Comparison and Judgment) In the above embodiment, for example, as the comparison of the magnitude between the ratio R and the ratio threshold Rth, the cases of R≧Rth and R<Rth are shown, but this is not limiting, and the comparison of the magnitude between the cases of R>Rth and R≦Rth may also be used. The comparison of the magnitudes of other values is the same.

[0145] (Judgment of Non-fire Factors) In the above embodiment, in addition to the judgment of white smoke and black smoke, the judgment of non-fire factors is also performed. However, the judgment of non-fire factors may not be performed, and only the judgment of white smoke and black smoke may be performed.

[0146] (Fire Alarm Equipment) The above embodiment takes a wired system in which a photoelectric smoke detector is connected to the signal line from the receiver as an example, but a wireless system in which the receiver and the photoelectric smoke detector are connected by a wireless line may also be used.

[0147] (From White Smoke Fire to Black Smoke Fire) In addition, in the above embodiment, when the receiver, for example, changes from a white smoke fire to a black smoke fire after a certain period of time, the receiver may perform the interlocking control of the black smoke fire.

[0148] (Processing of Receiver) In addition, in the processing of fire alerts by the receiver in the above embodiment, white smoke fires and black smoke fires are treated equally in terms of alert generation and control, but log recording and display, etc. may be performed by distinguishing between white smoke fires, black smoke fires, and non-fires.

[0149] (Storage of smoke detection results) In addition, the result of the determination of whether there is a white smoke fire, a black smoke fire, or no fire may be stored in the smoke detector.

[0150] (others) Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages of the present invention, and is not limited to the numerical values ​​shown in the above embodiment. [Explanation of symbols]

[0151] 10: Receiver 12, 12-1 to 12-3: Signal lines 14: Photoelectric smoke detector 16: Repeater 18: District sound equipment 20: Exhaust system 22: Fire door 24: Fire extinguishing equipment 26: Emergency broadcast device 28: Speaker 30: Automatic reporting device 32: Public telephone line 36: Main CPU 38-1 to 38-3: Sub-CPU board 40: Sub CPU 42: Transmission section 44: Serial transfer bus 46: Display 48: Display section 50:Operation unit 52: Acoustic alarm section 54: Transfer Department 56: Transmission control section 58: Fire alarm control unit 60: Interlocking control unit 61: History processing section 62: Sensor control unit 64: Transmission section 66: Power supply section 68: Light emitting driver 70: Smoke Detection Department 74, 76: Amplification circuit section 78: Light emitting element 78a, 80a, 82a: Optical axis 80: First light receiving element 82: Second light receiving element 84-1: White smoke fire alarm screen 84-2: Black smoke fire alarm screen 84-3: Non-fire warning screen 85: Fire mark 86: Fire representative display section 88: District display section 90-1 to 90-3: Type display section 92,116: Guidance display section 94: Main sound stop button 96: Advance button 98-1~98-3: Linked display 100: Local acoustic alarm sound 102: Exhaust system in operation 104: Fire door closed 106: Fire extinguisher activated 108: Emergency broadcast 110: Automatic reporting 120-1: White smoke fire map screen 120-2: Black smoke fire map screen 120-3: Non-fire map screen 122: Notification order display section 124-1 to 124-3: Type display section 126-1~126-3: Overall map 128-1~128-3:Detailed map 130-1: White smoke fire area 130-2: Black smoke fire area 130-3: Non-fire area 132: Non-fire mark

Claims

1. A fire alarm system that identifies a plurality of types of predetermined events, including a fire occurring in a predetermined alert area, by connecting a predetermined terminal device to a receiver, a display unit that functions as an alarm display unit that notifies the user of an identified event and a map display unit that displays a map of the alert area; the display unit is capable of switching between displaying as the warning display unit and displaying as the map display unit when the predetermined event is identified, When the predetermined event is identified, a map of the alert area showing the predetermined event and a location where the predetermined event occurred can be displayed on the map display unit; the map displayed on the map display unit when the predetermined event is identified includes an overall map showing the entirety of the alert area and a detailed map showing a part of the alert area in the vicinity of a location where the predetermined event has occurred; a predetermined section in which the predetermined event occurred is identifiably displayed on the overall map and the detailed map, thereby indicating the location where the predetermined event occurred; a predetermined section identifiably displayed on the detailed map is displayed in a different color for each type of event, and a symbol mark corresponding to the identified event is displayed in the predetermined section, thereby indicating the predetermined event so that a user can recognize the type of event when viewing the map; A fire alarm system characterized in that a symbol mark displayed on the detailed map of the map display unit is the same as a symbol mark corresponding to a predetermined event displayed on the alarm display unit.

2. A receiver that is connected to a predetermined terminal device and identifies a plurality of types of predetermined events including a fire occurring in a predetermined alert area, a display unit that functions as an alarm display unit that notifies the user of an identified event and a map display unit that displays a map of the alert area; the display unit is capable of switching between displaying as the warning display unit and displaying as the map display unit when the predetermined event is identified, When the predetermined event is identified, a map of the alert area showing the predetermined event and a location where the predetermined event occurred can be displayed on the map display unit; the map displayed on the map display unit when the predetermined event is identified includes an overall map showing the entirety of the alert area and a detailed map showing a part of the alert area in the vicinity of a location where the predetermined event has occurred; a predetermined section in which the predetermined event occurred is identifiably displayed on the overall map and the detailed map, thereby indicating the location where the predetermined event occurred; a predetermined section identifiably displayed on the detailed map is displayed in a different color for each type of event, and a symbol mark corresponding to the identified event is displayed in the predetermined section, thereby indicating the predetermined event so that a user can recognize the type of event when viewing the map; A receiver characterized in that a symbol mark displayed on the detailed map of the map display unit is the same as a symbol mark corresponding to a predetermined event displayed on the alarm display unit.

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