Fire warning facility and receiver

Abstract

To enable appropriate fire monitoring by a photoelectric smoke detector connected to a signal line from a receiver by utilizing a smoke identification function and a non-fire prevention function as to identify an event including a fire.SOLUTION: A receiver of a fire alarm system comprises a display unit, the receiver being connected to a photoelectric smoke detector to identify a white smoke fire, a black smoke fire, and a non-fire as events in a predetermined warning area. The display unit is switchable between an alarm screen for notifying an identified event and a map screen for displaying a map of the warning area. On the map of the warning area displayed on the map screen, the receiver displays a symbol mark corresponding to the identified event at a location where the identified event has occurred, and the symbol mark displayed on the map screen is the same symbol mark corresponding to the identified event displayed on the alarm screen.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a fire alarm facility and a receiver that connect a predetermined terminal device to a receiver and identify a plurality of types of predetermined events including a fire occurring in a predetermined warning area.

Background Art

[0002] Conventionally, in a fire alarm facility known as type R, a fire detector having a transmission function with a unique address is connected to a signal line drawn from a receiver. In a normal monitoring state, detection values such as smoke density and temperature are collected and monitored by calling fire detectors with sequentially specified detector addresses. In the event of a fire, based on a fire interrupt signal from the fire detector, a search command is issued from the receiver to identify the address of the fire detector that has issued an alarm, collect the detection value, and when the detection value exceeds a predetermined fire alarm threshold, it is determined as a fire and a fire alarm is output. Further, interlocking control such as an exhaust device, a fire door, a fire extinguishing device, and automatic notification to a fire department is performed.

[0003] Also, in conventional fire alarm facilities, a photoelectric smoke detector that detects smoke caused by a fire is used as a fire detector. Conventional photoelectric smoke detectors may issue non-fire alarms not only due to smoke caused by a fire but also due to cooking smoke, bathroom steam, etc.

[0004] In order to prevent non-fire alarms caused by such non-fire causes, a so-called two-wavelength type photoelectric smoke detector has been proposed that irradiates a smoke detection space with light of two wavelengths, obtains the ratio of light intensities of different wavelengths for scattered light caused by smoke, determines the type of smoke, and enhances the accuracy of smoke identification to ensure prevention of non-fire alarms (Patent Document 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0006] However, in such a conventional two-wavelength type photoelectric smoke detector, although it is mentioned that the type of smoke caused by a fire is identified to ensure prevention of false fire alarms, when actually connecting to a receiver to monitor for a fire, regarding how to perform fire monitoring control and interlock control by utilizing the smoke identification function and false fire prevention function of the photoelectric smoke detector for fire-caused smoke, and also regarding how to perform fire monitoring control that prevents false fire alarms through signal transmission and reception between the receiver and the two-wavelength type photoelectric smoke detector, there is no mention. Construction of a new fire alarm facility with a two-wavelength type photoelectric smoke detector connected to the signal line from the receiver remains as a new problem.

[0007] An object of the present invention is to provide a fire alarm facility and a receiver that can identify events including a fire by making use of the smoke identification function and false fire prevention function of a photoelectric smoke detector connected to a signal line from a receiver, and enable appropriate fire monitoring. [Means for Solving the Problems]

[0008] (Fire alarm equipment) The present invention provides 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 can switch between an alarm screen that notifies the user of an identified event and a map screen that displays a map of the alert area; On the map of the alert area displayed on the map screen, a symbol mark corresponding to the identified event is displayed at the location where the identified event occurred; The symbol mark displayed on the map screen is the same as the symbol mark displayed on the alarm screen and corresponding to the identified event.

[0009] (Symbol to be displayed on detailed map) The map of the alert area displayed on the map screen includes an overall map showing the entire alert area and a detailed map showing a part of the alert area near the location where the identified event occurred; The symbol will be displayed on the detailed map.

[0010] (Receiver) The present invention provides a receiver that can be connected to a predetermined terminal device to identify a plurality of types of predetermined events, including a fire occurring in a predetermined alert area, A display unit is provided that can switch between an alarm screen that notifies of the identified event and a map screen that displays a map of the alert area, On a map of the alert area displayed on a map screen, a symbol mark corresponding to the identified event is displayed at a location where the identified event has occurred; The symbol mark displayed on the map screen is the same as the symbol mark displayed on the alarm screen and corresponding to the identified event. [Effects of the Invention]

[0011] (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 occur 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.This makes it easy to recognize the location of the event from the displayed map, and to easily recognize the event that has occurred from the list of events, making it possible to appropriately and easily monitor the events that have occurred and take the necessary measures.

[0012] (Fire alarm system: Effect of displaying an overall map and a detailed map) The present invention is a fire alarm system that connects a specified terminal device to a receiver and identifies multiple types of specified events, including fires that occur in specified alert areas, and is equipped with a map display unit that displays a map of the alert area.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.

[0013] (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 section where the specified event occurred, making it even easier to identify the location where the event occurred.

[0014] (Fire alarm system: Effect of map display that makes it possible to recognize incidents that have occurred) The present invention relates to a fire alarm device that connects a predetermined terminal device to a receiver and identifies a plurality of types of predetermined events including a fire occurring in a predetermined warning area. The device includes a map display unit that displays a map of the warning area. When a predetermined event is identified, a map of the warning area indicating the location where the predetermined event occurred can be displayed on the map display unit. When a predetermined event is identified, the predetermined event displayed on the map displayed on the map display unit is displayed in such a manner that the type of the event can be recognized when the user views the map. Therefore, the location where the event occurred and the event that occurred can be easily recognized from the displayed map, and the event that has occurred can be appropriately and easily monitored, enabling necessary countermeasures to be taken.

[0015] (Effect of display according to the degree of danger of the identified event) The identified predetermined event is displayed on the map display unit in a manner corresponding to the degree of danger for each type of the predetermined event. Therefore, the degree of danger of the event that has occurred can be easily recognized from the displayed map, enabling necessary countermeasures to be taken.

[0016] (Effect of the receiver) The present invention relates to a receiver that connects a predetermined terminal device and identifies a plurality of types of predetermined events including a fire occurring in a predetermined warning area. The receiver includes a map display unit that displays a map of the warning area. When a predetermined event is identified, a map of the warning area indicating the location where the predetermined event occurred can be displayed on the map display unit. For a fire as a predetermined event, further, it is identified whether the type of the event is a white smoke fire or a black smoke fire, and based on the identification result, when the user views the map, the map display unit is configured to display whether the type of the event is a white smoke fire or a black smoke fire in a recognizable manner. Therefore, the location where the event occurred and the event that occurred can be easily recognized from the displayed map, and the event that has occurred can be appropriately and easily monitored, enabling necessary countermeasures to be taken.

Brief Description of the Drawings

[0017]

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[0018] [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, a receiver 10 of, for example, an R type is installed in a monitoring center or a caretaker's room of a facility where the fire alarm system is installed, and signal lines 12-1 to 12-3 are drawn out from the receiver 10 to the alert area, divided into systems.

[0019] A plurality of optoelectronic smoke detectors 14 having a transmission function with a unique address set are connected to the signal line 12-1. The optoelectronic smoke detector 14 is a so-called two-wavelength type optoelectronic smoke detector that detects a first smoke concentration detection value A1 by receiving scattered light of smoke by setting light of a first wavelength λ1 and a first scattering angle θ1, and also detects a second smoke concentration detection value A2 by receiving scattered light of smoke by setting light of a second wavelength λ2 and a second scattering angle θ2.

[0020] Here, regarding the first smoke concentration detection value A1 and the second smoke concentration detection value A2, in the following description, they may simply be referred to as the smoke concentration detection value A1 and the smoke concentration detection value A2.

[0021] In addition to the so-called two-wavelength type optoelectronic smoke detector 14, a normal optoelectronic smoke detector or a heat detector having a transmission function is connected to the signal line 12-1, and an on-off type fire detector or a transmitter is connected to a detector line drawn from a repeater having a transmission function, but the illustration is omitted.

[0022] Control devices such as a local sound device 18, an exhaust device (smoke exhaust device) 20, a fire door 22, and a fire extinguishing device 24 are connected to the signal lines 12-2 and 12-3 via a repeater 16 having a transmission function with a unique address set.

[0023] The local sound device 18 outputs a predetermined local sound alarm notifying the occurrence of a fire in the warning area under the control of the receiver 10. In this embodiment, when the receiver 10 recognizes a white smoke fire, it outputs a local sound alarm including a message prompting on-site confirmation. Also, when the receiver 10 discriminates a black smoke fire, it outputs a local sound alarm including a message prompting evacuation.

[0024] The exhaust device 20 is activated according to a control instruction from the receiver 10 to ventilate the warning area. The fire door 22 has its release latch for opening and holding released and is operated to the closed position under the control instruction from the receiver 10 to close the section where the fire has occurred and suppress the spread of the fire.

[0025] The fire extinguishing device 24 is activated by a control instruction from the receiver 10, and discharges fire extinguishing water and fire extinguishing agents to extinguish and suppress the fire. This fire extinguishing device 24 includes, for example, a dry sprinkler fire extinguishing facility, etc., and drives the simultaneous opening valve to open by a control instruction from the receiver 10, and sprays fire extinguishing water from the open type head.

[0026] In addition to the control devices such as the area acoustic device 18, the exhaust device 20, the fire door 22, and the fire extinguishing device 24 connected to the signal lines 12-2 and 12-3, a very important broadcast device 26 and an automatic reporting device 30 are connected to the receiver 10.

[0027] The very important broadcast device 26 operates according to a transfer signal from the receiver 10, notifies the occurrence of a fire from the speaker 28 installed in the alert area, and outputs a very important broadcast for evacuation guidance. When the very important broadcast device 26 is activated, the area acoustic alarm by the area acoustic device 18 is stopped.

[0028] The automatic reporting device 30 operates according to a transfer signal from the receiver 10, and makes a 119 call connection to the fire department via the public telephone line 32 to report the occurrence of a fire.

[0029] The maximum number of addresses per line set for terminal devices such as the photoelectric smoke detector 14 and the repeater 16 connected to the signal lines 12-1 to 12-3 is, for example, 255, and a maximum of 255 terminal devices can be connected to each of the signal lines 12-1 to 12-3.

[0030] (Functional Configuration of Receiver) The receiver 10 is provided with a main CPU 36 and sub-CPU boards 38-1 to 38-3. 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 to and from each other.

[0031] Connected to the main CPU 36 are a display 46 with a touch panel using a liquid crystal display panel or the like, a display unit 48 provided with representative lights for fire, gas leakage, and failures, LED display lights, etc., an operation unit 50 provided with various switches necessary for fire monitoring such as a fire determination switch, a zone sound stop switch, a transfer stop switch, etc., a sound alarm unit 52 provided with a speaker, and a transfer unit 54.

[0032] As functions realized by the execution of a program in the main CPU 36, a fire alarm control unit 58, an interlock control unit 60, and a history processing unit 61 are provided.

[0033] A transmission control unit 56 is provided as a function realized by the execution of a program in the sub-CPUs 40 of the sub-CPU boards 38-1 to 38-3. The transmission control unit 56 of the sub-CPU board 38-1 performs control to collect a first smoke density detection value A1 and a second smoke density detection value A2 detected by the two-wavelength type photoelectric smoke detector 14 connected to the signal line 12-1.

[0034] Also, the transmission control units 56 of the sub-CPU boards 38-2 and 38-3 perform fire interlock control by transmitting a control signal designating the address of the repeater 16 that connects control devices such as the zone sound device 18, the exhaust device 20, the fire door 22, and the fire extinguishing device 24 connected to the respective signal lines 12-2 and 12-3.

[0035] (Collection Control of Sensor Detection Data) The transmission control unit 56 provided in the sub-CPU 40 of the sub-CPU board 38-1 performs control to collect detection data by instructing the transmission unit 42 to transmit and receive signals according to a predetermined communication protocol with the photoelectric smoke detector 14 connected to the signal line 12-1.

[0036] 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.

[0037] On the other hand, the upstream signal from the optoelectronic 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.

[0038] During normal monitoring, the data collection control by the transmission control unit 56 of the sub-CPU 40 instructs the transmission unit 42 at regular intervals to transmit a broadcast batch AD conversion signal including a batch AD conversion command. The optoelectronic smoke detector 14 that has received this batch AD conversion signal converts the smoke concentration detection signals of the first smoke concentration detection value A1 and the second smoke concentration detection value A2 output from the smoke detection unit into digital smoke concentration detection value signals by AD conversion and holds them.

[0039] Subsequently, the transmission control unit 56 of the sub-CPU 40 transmits a call signal including a polling command with the terminal address specified sequentially. When the optoelectronic smoke detector 14 receives a call signal with an address that matches its own address, it transmits a call response signal indicating its own state to the receiver 10.

[0040] Also, when the optoelectronic smoke detector 14 is equivalent to a two-sensitivity smoke detector that issues a fire alarm at, for example, a smoke concentration of 10% / m, a smoke concentration threshold equivalent to a single sensitivity, for example, a smoke concentration threshold of 5.0% / m, is set as the attention display threshold AP1th for the first smoke concentration detection value A1 of the optoelectronic smoke detector 14. When the detected first smoke concentration detection value A1 becomes equal to or higher than the attention display threshold AP1th, it is determined that a fire alarm has occurred, and a fire interrupt signal is transmitted to the receiver 10.

[0041] Note that a smoke concentration threshold equivalent to a single sensitivity, for example, a smoke concentration threshold of 5.0% / m, may be set as the attention display threshold AP2th for the second smoke concentration detection value A2 of the optoelectronic smoke detector 14. When the detected second smoke concentration detection value A2 becomes equal to or higher than the attention display threshold AP2th, it is determined that a fire alarm has occurred, and a fire interrupt signal may be transmitted to the receiver 10.

[0042] When the transmission control unit 56 of the sub-CPU 40 receives a fire interrupt signal from the optoelectronic smoke detector 14 via the transmission unit 42, it transmits a group search command signal to identify the group containing the optoelectronic smoke detector 14 that reported the fire. Subsequently, it transmits an in-group search command signal to identify the address of the optoelectronic smoke detector 14 that reported the fire, centrally collects the first and second smoke concentration detection values A1 and A2, and transmits them to the main CPU 36 via the serial transfer bus 44.

[0043] The centralized collection of the first and second smoke concentration detection values A1 and A2 by the transmission control unit 56 of the sub-CPU 40 shortens the transmission cycle of the batch AD conversion signal. After transmitting the batch AD conversion signal, by transmitting a call signal specifying the address of the optoelectronic smoke detector 14 that reported the fire, the first smoke concentration detection value A1 and the second smoke concentration detection value A2 of the optoelectronic smoke detector 14 are continuously collected.

[0044] The fire alarm control unit 58 of the main CPU 36 calculates the ratio R = A1 / A2 from the first smoke concentration detection value A1 and the second smoke concentration 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 of white smoke fires and black smoke fires by the fire alarm control unit 56 will be clarified in the subsequent description of the optoelectronic smoke detector 14.

[0045] The fire alarm control by the fire alarm control unit 58 lights the fire representative lamp of the display unit 48, outputs a predetermined main acoustic alarm indicating the occurrence of a fire from the speaker of the acoustic alarm unit 52, and displays fire alarm information including the location of the fire and 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 on the display 46.

[0046] When a 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. When a black smoke fire is identified, it performs predetermined black smoke fire interlock control.

[0047] The interlock control of the white smoke fire by the interlock control unit 60 transmits a district sound control signal designating the address of the district sound device 18 installed in the warning area corresponding to the address of the photoelectric smoke detector 14 that has reported a fire (i.e., the address of the repeater 16 to which the district sound device 18 is connected), and activates the district sound device 18 with the designated address. Since the white smoke fire is a fire that generates white smoke due to a smoldering fire in the initial stage of the fire, a district sound alarm including a voice message prompting on-site confirmation by residents or the like is output.

[0048] The interlock control of the white smoke fire 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 has reported a fire (i.e., the address of the repeater 16 to which the exhaust device 20 is connected), and discharges the white smoke generated by the smoldering fire to the outside by activating the exhaust device 20 to perform ventilation.

[0049] On the other hand, the interlock control of the black smoke fire by the interlock control unit 60 operates the district sound device 18, the exhaust device 20, the fire door 22, and the fire extinguishing device 24 by transmitting a control signal designating the addresses of the repeaters 16 to which the district sound device 18, the exhaust device 20, the fire door 22, and the fire extinguishing device 24 installed in the warning area corresponding to the address of the photoelectric smoke detector that has reported a fire are connected.

[0050] Based on the identification of this black smoke fire, the district sound alarm by the operation of the district sound device 18 outputs a district sound alarm including a voice message prompting evacuation of residents or the like because the black smoke fire generates black smoke due to a combustion fire, and the fire spreads quickly and the risk is high. Also, the activation of the exhaust device 20 based on the identification of the black smoke fire performs ventilation in the fire occurrence section, the closing activation of the fire door 22 closes the fire occurrence section to suppress the spread of the fire, and the activation of the fire extinguishing device 24 suppresses the fire by discharging fire extinguishing water or the like.

[0051] Furthermore, as the black smoke fire interlock control, when the transfer stop switch of the operation unit 50 is operated and the transfer stop is in effect during operation, the interlock control unit 60 of the main CPU 36 instructs the transfer unit 54 to output a transfer signal to the emergency broadcast device 26 and the automatic notification device 30 for interlock control.

[0052] At this time, the emergency broadcast device 26 is activated by a signal from the receiver 10, and makes an emergency broadcast from the speakers 28 installed in the alert area notifying people of the occurrence of a fire and including an audio message urging people to evacuate. At this time, the interlocking control unit 60 sends a stop signal to the district sound device 18 to stop the output of the district sound alarm, ensuring that the emergency broadcast can be heard reliably. In addition, the automatic reporting device 30 is activated by a signal from the receiver 10, and automatically reports the occurrence of a fire to the fire department by calling 119 over the public telephone line 32, requesting that the fire be extinguished.

[0053] 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 linkage control and black smoke fire linkage control by the linkage control unit 60, and performs processing to read and store the history information in a portable storage medium such as a USB memory as needed.

[0054] Therefore, based on the historical information, which is a unique 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 pursue the cause of the fire and analyze the progress of the fire with high accuracy.

[0055] [Photoelectric smoke detector] (Circuit configuration) Figure 2 is a block diagram showing the circuit configuration of a photoelectric smoke detector provided in the fire alarm system of Figure 1. As shown in Figure 2, the photoelectric smoke detector 14 of this embodiment is composed of a detector control unit 62 consisting 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 the signal line 12 connected to the S terminal and the 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 and 76.

[0056] The smoke detection unit 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 center wavelength set to 600 nm or more, and the light of the second wavelength λ2 has a center wavelength set to 500 nm or less. 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.

[0057] In this embodiment, a white LED (white light emitting diode) is used as the light emitting element 78. The white LED combines, for example, a blue LED and a phosphor, passes the light of the blue LED through the phosphor to emit white light, and this emission color includes light with a first wavelength λ1 = 700 nm and light with a second wavelength λ2 = 450 nm, and it is possible to simultaneously irradiate the inside of the smoke detection unit 70 with the light of the first wavelength λ1 and the second wavelength λ2.

[0058] Also, as the light emitting element 78 of this embodiment, a two-color LED (two-color light emitting diode) can also be used. 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 simultaneously, it is possible to simultaneously irradiate the inside of the smoke detection unit 70 with the light of the first wavelength λ1 and the second wavelength λ2.

[0059] A photodiode (PD) having sensitivity to the first wavelength λ1 is used for the first light receiving element 80, and a photodiode (PD) having sensitivity to the second wavelength λ2 is used for the second light receiving element 82.

[0060] Also, as the first light receiving element 80 and the second light receiving element 82, a filter layer that receives only the wavelength bands of the first wavelength λ1 and the second wavelength λ2 may be provided on a broadband photodiode having sensitivity in the visible light wavelength band 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 arranged in front of the broadband photodiode.

[0061] The amplification circuit unit 74 amplifies the received signal of the smoke scattered light of the first wavelength λ1 received by the first light receiving element 80, and outputs a received signal to the sensor control unit 62 that becomes the first smoke density detection value A1. Further, the amplification circuit unit 76 amplifies the received signal of the smoke scattered light received by the second light receiving element 82, and outputs a received signal to the sensor control unit 62 that becomes the second smoke density detection value A2.

[0062] (Smoke detection unit) 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 the smoke detection unit 70 into which smoke from the outside flows.

[0063] For example, the light emitting element 78 using a white LED irradiates light including the first wavelength λ1 and the second wavelength λ2 in the direction of the optical axis 78a. 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.

[0064] 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 defined in the range of 20° to 70°, and 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 predetermined angle in the range of 110° to 160°.

[0065] Further, 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 defined in the range of 110° to 150°, and 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 predetermined angle in the range of 30° to 70°.

[0066] In the present embodiment, since the first scattering angle θ1 is defined as 30°, 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 an intersection angle of, for example, 150°. Further, since the second scattering angle θ2 is defined as 120°, 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 an intersection angle of, for example, 60°.

[0067] Since the first light-receiving element 80 is sensitive to light with a first wavelength λ1 = 700 nm emitted from the light-emitting element 78, when the light-emitting element 78 emits light with the first wavelength λ1, scattered light with a scattering angle θ1 = 30° due to the smoke flowing into the smoke detection unit 70 is received by the first light-receiving element 80, and a first smoke density detection value A1 is obtained.

[0068] Also, since the second light-receiving element 82 is sensitive to light with a second wavelength λ2 = 450 nm emitted from the light-emitting element 78, when the light-emitting element 78 emits light with the second wavelength λ2 simultaneously with the light of the first wavelength λ1, scattered light with a second scattering angle θ2 = 120° due to the smoke flowing into the smoke detection unit 70 is received by the second light-receiving element 82, and a second smoke density detection value A2 is obtained simultaneously.

[0069] When the sensor control unit 62 shown in FIG. 2 receives a batch AD conversion 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, thereby emitting white light including the first wavelength λ1 and the second wavelength λ2. The backward scattered light with the first scattering angle θ1 = 30° due to the first wavelength λ1 is received by the first light-receiving element 80, and the first smoke density detection signal A1 output from the amplifier circuit unit 74 corresponding thereto is AD-converted into digital data, read, and stored in the memory.

[0070] At the same time, since the backward scattered light with the second scattering angle θ2 = 120° due to the second wavelength λ2 is received by the second light-receiving element 82, the sensor control unit 62 AD-converts the second smoke density detection signal A2 output from the amplifier circuit unit 76 corresponding to the reception by the second light-receiving element 82 into digital data, reads it, and stores it in the memory.

[0071] Subsequently, the sensor control unit 62 compares the first smoke density detection value A1 stored in the memory with a warning display threshold value AP1th predetermined corresponding to the set sensitivity of the photoelectric smoke sensor 14. When the first smoke density detection value A is equal to or greater than the warning display threshold value AP1th, it determines that a fire has occurred and performs control to instruct the transmission unit 64 to transmit a fire interrupt signal to the receiver 10.

[0072] Here, as described above, when the photoelectric smoke detector 14 has a sensitivity equivalent to two types with a fire alarm threshold A1th of 10% / m, for example, the attention display threshold AP1th is set to AP1th = 5% / m, which is equivalent to the sensitivity of one type. Also, when the photoelectric smoke detector 14 has a sensitivity equivalent to three types with a fire alarm threshold A1th of 15% / m, for example, the attention display threshold AP1th is set to AP1th = 10% / m, which is equivalent to the sensitivity of two types.

[0073] (Discrimination between white smoke fire and black smoke fire) FIG. 4 is an explanatory diagram showing the smoke density detection values detected by the smoke detection unit structure of FIG. 3 for the smoke when a cotton wick and kerosene are burned and their ratios.

[0074] As shown in FIG. 4, the first smoke density detection value A1 is the light reception output of the scattered light by the first wavelength λ1 = 700 nm and the first scattering angle θ1 = 30°, and the second smoke density detection value A2 is the light reception output by the scattered light of the second wavelength λ2 = 450 nm and the second scattering angle θ2 = 120°.

[0075] When taking the ratio R = A1 / A2 of the first and second smoke density detection values A1 and A2 measured by the combustion of such a cotton wick and kerosene, R = 8.0 in the case of the cotton wick and R = 2.3 in the case of kerosene. A significant difference appears in the ratio R between the cotton wick and kerosene, and the discrimination of the type of smoke based on the ratio R becomes possible.

[0076] Therefore, for example, a ratio threshold Rth = 5 is set as the ratio threshold for discriminating the type of smoke. When R ≥ 5, it is determined as a white smoke fire in which white smoke is generated by smoldering, and when R < 5, it can be determined as a black smoke fire in which black smoke is generated by combustion.

[0077] In this embodiment, since the receiver 10 shown in FIG. 1 collects the first and second smoke density detection values A1 and A2 detected by the photoelectric smoke detector 14 that has issued a fire alarm, the fire alarm control unit 58 calculates the ratio R = A1 / A2 of the smoke density detection values A1 and A2, and when R ≥ 5, it is determined as a white smoke fire in which white smoke is generated by smoldering, and when R < 5, it is determined as a black smoke fire in which black smoke is generated by combustion.

[0078] Further, when the fire alarm control unit 58 of the receiver 10 determines a white smoke fire based on the first smoke density detection values A1 and A2, if the first smoke density detection value A1 is equal to or greater than the fire alarm threshold value A1th corresponding to the smoke density of 10% / m with two types of sensitivities, it determines that a fire is confirmed, and performs control to output a fire alarm including information indicating a white smoke fire.

[0079] Similarly, when the fire alarm control unit 58 of the receiver 10 determines a black smoke fire based on the first smoke density detection values A1 and A2, if the second smoke density detection value A2 is equal to or greater than the fire alarm threshold value A2th corresponding to the smoke density of 10% / m with two types of sensitivities, it determines that a fire is confirmed, and performs control to output a fire alarm including information indicating a black smoke fire. In the control operations of the receiver 10 shown in FIGS. 11 and 13 described later, the above determination of fire confirmation is omitted.

[0080] (Identification of non-fire factors) When, for example, steam from a bathroom or the like flows into the smoke detection unit 70 of the photoelectric smoke detector 14 shown in FIG. 3 as a non-fire factor, the ratio R of the first and second smoke density detection values A1 and A2 shows a large value exceeding, for example, R = 10. <^{}

[0081] Therefore, as a non-fire factor threshold value RSth for identifying steam, for example, RSth = 12 is set, and if R ≧ 12, it is identified that it is a non-fire factor such as steam.

[0082] The determination of non-fire factors based on the ratio R of the first and second smoke density detection values A1 and A2 is also performed by the fire alarm control unit 58 of the receiver 10. If R ≧ 12, it is determined that it is a non-fire factor such as steam, and control is performed to output a caution alarm indicating the occurrence of a non-fire factor such as steam instead of a fire alarm.

[0083] [Fire alarm display] (White smoke fire alarm display) FIG. 5 is an explanatory diagram showing a white smoke fire alarm screen, and FIG. 6 is an explanatory diagram showing a map screen of a white smoke fire.

[0084] As shown in FIG. 5, when a white smoke fire is identified, a white smoke fire alarm screen 84-1 is displayed on the display 46. On the white smoke fire alarm screen 84-1, a fire mark 85 and a fire representative display section 86 are arranged at the upper part of the screen. Subsequently, a district display section 88 is arranged within the frame below that, then a guidance display section 92 is arranged, and then a main sound stop button 94 and a forward button 96 are arranged. In addition to this, for example, within the district display section 88, a type display section 90-1 is arranged, and the characters "White smoke fire (smoldering fire)" are displayed.

[0085] Subsequently, an interlock display 98-1 is arranged, and on the interlock display 98-1, a district sound alarm activation 100 and an exhaust device activation 102 indicating the interlock control activated in response to the identification of a white smoke fire are displayed as the interlock content.

[0086] Also, when the forward button 96 on the white smoke fire alarm screen 84-1 in FIG. 5 is touched and operated with a fingertip or the like, it is switched to the white smoke fire map screen 120-1 shown in FIG. 6. On the white smoke fire map screen 120-1 in FIG. 6, a transmission order display section 122 is provided at the upper part of the screen. In the first row, the first fire alarm transmission is displayed together with the fire occurrence district. Furthermore, it is indicated in the type display section 124-1 that it is a "white smoke fire".

[0087] Also, on the white smoke fire map screen 120-1, an overall map 126-1 and a detailed map 128-1 indicating the fire occurrence location therein are displayed. The white smoke fire occurrence section 130-1 where the white smoke fire is occurring is identified and displayed, for example, in yellow, and a fire mark 85 is arranged.

[0088]

[0089] ​In addition, when the person in charge or the like views the linked display 98-1, it is possible to confirm that the linked control of the area acoustic alarm activation 100 and the exhaust device activation 102 is performed in conjunction with the white smoke fire alarm.

[0090] (Black smoke fire alarm display) Figure 7 is an explanatory diagram showing a black smoke fire alarm screen, and Figure 8 is an explanatory diagram showing a map screen of a black smoke fire.

[0091] As shown in Figure 7, when a black smoke fire is identified, a black smoke fire alarm screen 84-2 is displayed on the display 46. On the type display section 90-2 arranged in the area display section 88 of the black smoke fire alarm screen 84-2, the characters "Black smoke fire (combustion fire)" are displayed.

[0092] In addition, on the linked display 98-2, the area acoustic alarm activation 100, the exhaust device activation 102, the fire door closing 104, the fire extinguishing device activation 106, the emergency broadcast in progress 108, and the automatic notification 110 indicating the linked control activated in response to the identification of a black smoke fire are displayed as linked contents. Note that the area acoustic alarm activation 100 and the emergency broadcast in progress 108 are not performed simultaneously, and either one of them in operation is displayed. The rest is the same as the white smoke fire alarm screen 84-1 in Figure 5.

[0093] Also, when the advance button 96 of the black smoke fire alarm screen 84-2 in Figure 7 is touched with a fingertip or the like, it is switched to the black smoke fire map screen 120-2 shown in Figure 8. On the reporting order display section 122 in the black smoke fire map screen 120-2, it is shown that it is a "black smoke fire". Below that, the overall map 126-2 and the detailed map 128-2 indicating the fire occurrence location therein are displayed. The black smoke fire occurrence section 130-2 where a black smoke fire has occurred is identified and displayed, for example, in red indicating a high degree of danger. The rest is the same as the white smoke fire map screen 120-1 in Figure 6.

[0094] When a person in charge or the like views the black smoke fire alarm screen 84-2 displayed on the display 46 of the receiver 10 shown in FIG. 7 like this, it can be understood that the fire for which the fire alarm has been issued is a black smoke fire, and at the same time, it can also be understood that it is a combustion fire. It is known that it is a fire with a high risk of rapid spread of black smoke generated by combustion, etc. It becomes possible to confirm the fire site and take measures such as evacuation guidance and fire department notification.

[0095] Also, when a person in charge or the like views the linked display 98-2, in addition to the linked control of the area acoustic alarm activation 100 and the exhaust device activation 102 linked to the black smoke fire alarm, it is displayed that the fire door closing 104, the fire extinguishing device activation 106, the emergency broadcast in progress 108, and the automatic notification 110 are being carried out as fire linkages. It can be confirmed that the linked control required for identifying the black smoke fire is being carried out.

[0096] (Non-fire caution alarm 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 factors.

[0097] As shown in FIG. 9, when a non-fire factor such as steam is identified, a non-fire factor caution alarm screen 84-3 is displayed on the display 46. The non-fire factor caution alarm screen 84-3 has a non-fire mark 132 and a non-fire representative display section 114 arranged at the upper part of the screen. Subsequently, a type display section 90-3 is arranged in the area display section 88 within the frame below that, and the characters "Non-fire factor: Steam" are displayed.

[0098] Subsequently, a guidance display section 116 is arranged, and guidance saying "This is a non-fire alarm. Please pay attention" is displayed. Below that, a main sound stop button 94 and a forward button 96 are arranged.

[0099] Subsequently, in the linked display 98-3, for example, an intercom call 118 is displayed as the linked content as the linked control activated in response to the identification of non-fire factors. This intercom call 118 may be installed with an intercom facility that enables communication between the manager's room and the residential section when the facility where the fire alarm equipment is installed is an apartment building. When a non-fire report is identified, it is possible to automatically make an intercom call to the room where the non-fire report is occurring to arouse attention.

[0100] Also, when the advance button 96 of the non-fire factor attention alarm screen 84-3 in Fig. 9 is touched with a fingertip or the like, it is switched to the non-fire map screen 120-3 shown in Fig. 10. In the non-fire map screen 120-3 of Fig. 10, a report display section 122 is provided at the upper part of the screen, and the area where the first non-fire report occurred is displayed in the first row together with the non-fire report.

[0101] In addition, on the non-fire factor map screen 120-3, an overall map 126-3 and a detailed map 128-3 showing the location where the non-fire factor occurred are displayed. The non-fire factor occurrence section 130-3 where non-fire factors such as steam are occurring is identified and displayed in, for example, blue, and a non-fire mark 132 is arranged.

[0102] By a disaster prevention person or the like viewing the non-fire factor attention alarm screen 84-3 displayed on the display 46 of the receiver 10 shown in Fig. 9, it can be seen that steam is occurring as a non-fire factor in the room or the like targeted by the non-fire report. By making an intercom call through linked control, it is possible to contact the residents of the room or the like where the area is displayed to prompt attention.

[0103] Also, when the resident does not respond to an intercom call, there is a possibility of a situation where, for example, the resident went out leaving the kettle on the fire. Therefore, the disaster prevention staff needs to carefully monitor the development of the situation. In the case of overheating of the kettle, etc., there is a possibility of transitioning to a white smoke fire alarm following the attention alarm display for non-fire factors. In this case, even if there is no resident immediately, the disaster prevention staff can prepare to take measures such as forcibly entering the corresponding room. The same applies to the case where the ashtray continues to smolder due to improper handling of cigarettes, etc., and a warning can be issued for an event where "although there is no fire yet, there is a possibility of it."

[0104] [Fire Monitoring and Control of Fire Alarm Equipment 1] Figure 11 is a flowchart showing the first embodiment of the control operation in the receiver of FIG. 1, and is the control operation by the transmission control unit 56, the fire alarm control unit 58, and the interlock control unit 60 shown in FIG. 1. Also, Figure 12 is a flowchart showing the first embodiment of the control operation in the photoelectric smoke detector of FIG. 2, and is the control operation by the detector control unit 62. This embodiment is characterized by identifying white smoke fire, black smoke fire, or non-fire factors on the receiver 10 side.

[0105] (Control of Receiver) As shown in Figure 11, the transmission control unit 56 of the receiver 10 transmits a batch AD conversion signal of a broadcast designating all the photoelectric smoke detectors 14 at a predetermined cycle in step S1 to the signal line 12-1, and AD converts and stores the smoke concentration detection values A1, A2, which are analog signals detected on the photoelectric smoke detector 14 side, into digital signals.

[0106] Subsequently, the transmission control unit 56 transmits a call signal designating the addresses of the photoelectric smoke detectors 14 sequentially in step S2, receives the call response signal transmitted by the photoelectric smoke detector 14 that received the call signal in step S3, and monitors the state of whether the photoelectric smoke detector 14 is operating normally.

[0107] Subsequently, the transmission control unit 56 determines whether a fire interrupt signal from the photoelectric smoke detector 14 that reported a fire in step S4 has been received. When it determines that the fire interrupt signal has been received, it proceeds to step S5, and searches for the address of the photoelectric smoke detector 14 that reported the fire and transmitted the fire interrupt signal by transmitting a group search command signal and an in-group search command signal.

[0108] Subsequently, the transmission control unit 56 proceeds to step S6, shortens the period of the batch AD conversion signal, and repeatedly acquires the first and second smoke density detection values A1 and A2 from the photoelectric smoke detector 14 that reported the fire by transmitting a call signal specifying the address of the photoelectric smoke detector 14 that transmitted the fire interrupt signal, and transmits them to the fire alarm control unit 58 of the main CPU 36.

[0109] 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 Rth1 = 5 and the non-fire factor threshold RSth = 12 based on FIG. 4 to determine the type. If 5 ≤ R ≤ 1, 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 due to steam.

[0110] 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.

[0111] Subsequently, the interlocking control unit 60 proceeds to step S11, and as white smoke fire interlocking control corresponding to the discrimination of white smoke fire, 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 white smoke, it outputs a district acoustic alarm, and also 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 white smoke.

[0112] 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.

[0113] Subsequently, the interlocking control unit 60 proceeds to step S14, and as black smoke fire interlocking control corresponding to the discrimination of black smoke, by transmitting a control signal designating the addresses 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 black smoke, it activates each of them.

[0114] Furthermore, when the interlocking control unit 60 has set a transfer stop by operating the transfer stop switch of the operation unit 50 during operation, it instructs the transfer unit 54 to output a transfer signal to the emergency broadcast device 26 and the automatic notification device 30 to start them, and causes emergency broadcasting and automatic notification to the fire department. When starting the emergency broadcast device 26, the operation of the district acoustic device 18 stops.

[0115] On the other hand, when the fire alarm control unit 58 determines non-fire in step S15, it proceeds to step S16, causes the acoustic alarm unit 52 to output a caution acoustic alarm indicating a non-fire factor, drives the caution indicator lamp of the display unit 48, and further causes the display 46 to display the non-fire caution alarm screen 84-3 shown in FIG. 9.

[0116] Subsequently, the interlocking control unit 60 proceeds to step S17. As non-fire interlocking control corresponding to the identification of non-fire, it makes an intercom call to the room corresponding to the address of the photoelectric smoke detector 14 that has detected non-fire, conveys that a non-fire factor such as steam has occurred, and prompts confirmation.

[0117] Subsequently, the fire alarm control unit 58 repeats the processing from step S5 until fire recovery is determined in step S18. When fire recovery is determined, it transmits a fire recovery signal to the photoelectric smoke detector 14 in step S19 to effect recovery. Also, if the district sound device 18, the exhaust device 20, and the fire extinguishing device 24 are operating, it sends a stop control signal to stop them. Further, if the emergency broadcast device 26 is operating, it outputs a transfer stop signal to stop the emergency broadcast, then returns to step S1 and repeats the control from step S1.

[0118] (Control of Photoelectric Smoke Detector) As shown in FIG. 12, when the detector control unit 62 of the photoelectric smoke detector 14 shown in FIG. 2 determines the reception of the batch AD conversion signal from the receiver 10 in step S21, it proceeds to step S22. By driving the light emission of the light emitting element 78, it detects the smoke density detection value A1 detected by receiving the light of the first wavelength λ1 and the scattered light at the first scattering angle θ1, and the smoke density detection value A2 detected by receiving the light of the second wavelength λ2 and the scattered light at the second scattering angle θ2, and stores them in the memory in step S23.

[0119] Subsequently, when the detector control unit 62 determines the reception of the call signal designating its own address in step S24, it proceeds to step S25 and transmits a call response signal indicating the detector state to inform the receiver 10 of its own state.

[0120] Subsequently, the sensor control unit 62 proceeds to step S26. When it determines that the first smoke density detection value A1 is equal to or greater than the warning display threshold value AP1th, or that the second smoke density detection value A2 is equal to or greater than the warning display threshold value AP2th, a fire alarm is issued, and it proceeds to step S27 where it transmits a fire interrupt signal to the receiver 10. Subsequently, when it determines in step S28 that it has received the group search command and the in-group search command transmitted from the receiver 10, it proceeds to step S29 and transmits a search response signal indicating a fire alarm, thereby causing the receiver 10 to acquire the address of the photoelectric smoke sensor 10 that has issued the fire alarm.

[0121] Subsequently, since the receiver 10 transmits a batch AD conversion signal and a call signal specifying the fire alarm address at short intervals, when the sensor control unit 62 determines in step S30 that it has received the batch AD conversion signal and the call signal, it proceeds to step S31. By driving the light emitting element 78 to emit light, it detects the first and second smoke density detection values A1 and A2 and stores them in the memory. In step S32, it transmits a call response signal including the smoke density detection values A1 and A2 to the receiver 10. On the receiver 10 side, it calculates the ratio R of the smoke density detection values A1 and A2 to identify a white smoke fire, a black smoke fire, or a non-fire factor, and outputs a fire alarm or a non-fire warning alarm.

[0122] Subsequently, the sensor control unit 62 repeats the processing from step S30 until it determines in step S33 that it has received a fire recovery signal from the receiver 10. When it determines that it has received the fire recovery signal, it returns to step S1 and repeats the same control operation.

[0123] [Fire Monitoring Control of Fire Alarm Equipment 2] Figure 13 is a flowchart showing a second embodiment of the control operation in the receiver, and is the control operation by the transmission control unit 56, the fire alarm control unit 58, and the interlock control unit 60 shown in Figure 1. Figure 14 is a flowchart showing a second embodiment of the control operation in the photoelectric smoke sensor, and is the control operation by the sensor control unit 62. This embodiment is characterized in that the photoelectric smoke sensor 14 side identifies a white smoke fire, a black smoke fire, or a non-fire factor.

[0124] (Control of Receiver) As shown in FIG. 13, the processes of steps S41 to S45 by the transmission control unit 56 of the receiver 10 are the same as those of steps S1 to S5 in FIG. 11. Since the identification of a fireworks fire, a black smoke fire, or a non-fire factor is performed on the side of the photoelectric smoke detector 14, the processes corresponding to steps S6 and S7 in FIG. 11 are eliminated. Instead, the transmission control unit 56 receives, in step S46, a call response signal indicating a white smoke fire, a black smoke fire, or a non-fire transmitted from the photoelectric smoke detector 14, and identifies the type in step S47.

[0125] After the type is determined in step S47, the processes of steps S48 to S56 by the fire alarm control unit 58 and the interlock control unit 60 are the same as the processes of steps S9 to S17 in FIG. 11. The white smoke fire, black smoke fire, or non-fire is identified from the call response signal received from the photoelectric smoke detector 14. If it is a white smoke fire, a white smoke fire alarm is output and white smoke fire interlock control is performed. If it is a black smoke fire, a black smoke fire alarm is output and black smoke fire interlock control is performed. If it is a non-fire, a non-fire caution alarm is output and non-fire interlock control is performed. Also, steps S57 and S58 in FIG. 13 are the same as steps S18 and S19 in FIG. 11.

[0126] (Control of Photoelectric Smoke Detector) As shown in FIG. 14, the processes of steps S61 to S71 by the detector control unit 62 of the photoelectric smoke detector 14 shown in FIG. 2 are the same as the processes of steps S21 to S31 in FIG. 12. Also, step S79 is the same as step S33 in FIG. 12. Since the white smoke fire, black smoke fire, or non-fire factor is identified on the side of the photoelectric smoke detector 14, steps S72 to S78 are the processes specific to this embodiment.

[0127] That is, when the detector control unit 62 determines in step S70 that it has received a batch AD conversion signal with a shortened period from the receiver 10 and a call signal designating the detector address that has issued a fire alarm, it proceeds to step S71, and stores in the memory the smoke density detection value A1 detected by receiving the light of the first wavelength λ1 and the scattered light at the first scattering angle θ1, and the smoke density detection value A2 detected by receiving the smoke of the scattered light at the second wavelength λ2 and the second scattering angle θ2 by driving the light emitting element 78 to emit light.

[0128] Subsequently, the sensor control unit 62 proceeds to step S72, calculates the ratio R = A1 / A2 of the first and second smoke density detection values A1 and A2, compares it with a preset ratio threshold value R1th = 5 based on FIG. 4, and if R ≧ 5, identifies it as a white smoke fire, and if R < 5, identifies it as a black smoke fire. Further, if the ratio R is equal to or greater than a non-fire factor threshold value RSth = 12, the sensor control unit 62 identifies a non-fire factor due to steam or the like.

[0129] Subsequently, the sensor control unit 62 proceeds to steps S73 to S78, and transmits a call response signal including identification information of a white smoke fire, a black smoke fire, or a non-fire factor according to the identification result in step S72, and the first and second smoke density detection values A1 and A2 to the receiver 10, and controls the receiver 10 side to output a white smoke fire alarm, a black smoke fire alarm, or a non-fire caution alarm by the processing of steps S46 to S56 shown in FIG. 13, and performs interlock control corresponding to each of them.

[0130] [Modification Example of the Present Invention] (Photoelectric Smoke Sensor) In the above embodiment, as shown in FIG. 3, a photoelectric smoke sensor having a smoke detection unit structure including one light emitting element and two light receiving elements is taken as an example, but the present invention is not limited thereto, and any photoelectric smoke sensor having a smoke detection unit structure capable of obtaining the first and second smoke density detection values A1 and A2 by setting different wavelengths and scattering angles may be used. For example, a photoelectric smoke sensor having a smoke detection unit structure including two light emitting elements and one light receiving element shown in Patent Document 2 may also be used.

[0131] Further, in the above embodiment, when the photoelectric smoke sensor receives a batch AD conversion signal from the receiver, the first and second smoke density detection values A1 and A2 are detected by driving the light emitting element to emit light. However, without being instructed by the receiver, the photoelectric smoke sensor itself may intermittently drive the light emitting unit to emit light at a predetermined cycle to detect the first and second smoke density detection values A1 and A2.

[0132] (Alarm Screen) The white smoke fire alarm screen, black smoke fire alarm screen, and non-fire caution alarm screen shown in the above embodiments are just examples, and appropriate display forms can be adopted as needed.

[0133] (Interlock control) The white smoke fire interlock control, black smoke fire interlock control, and non-fire interlock control shown in the above embodiments are just examples, and appropriate interlock control can be adopted as needed.

[0134] (P-type fire alarm equipment) The above embodiments take the R-type fire alarm equipment that monitors fires by transmitting and receiving signals between a receiver and a photoelectric smoke detector with an address set as an example. However, due to the alarm of the photoelectric smoke detector, without receiving instructions from the receiver, a white smoke fire signal, black smoke fire signal, or non-fire factor signal can be transmitted to the receiver to output a white smoke fire alarm, black smoke fire alarm, or non-fire caution alarm as P-type fire alarm equipment.

[0135] With such P-type fire alarm equipment, by passing an alarm current through the signal line from the receiver by the photoelectric smoke detector, a white smoke fire signal, black smoke fire signal, or non-fire factor signal is transmitted to the receiver. However, in order to identify the white smoke fire signal, black smoke fire signal, or non-fire factor signal, a unique frequency signal or pulse code signal is superimposed on the alarm current and passed through. In this way, the receiver can identify the smoke fire signal, black smoke fire signal, or non-fire factor signal and output a white smoke fire alarm, black smoke fire alarm, or non-fire caution alarm.

[0136] Also, the interlock control of control devices such as the area sound device, exhaust device, and fire extinguishing device in the P-type fire alarm equipment becomes P-type interlock control performed on a line-by-line basis.

[0137] (Comparison and judgment) In the above embodiments, for example, as the comparison of the magnitudes of 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 magnitudes of the cases of R>Rth and R≦Rth can also be used. The comparison of the magnitudes of other values is the same.

[0138] (Judgment of non-fire factors) In addition to the determination of white smoke and black smoke, the above-described embodiment also performs the determination of non-fire factors. However, it is also possible to perform only the determination of white smoke and black smoke without performing the determination of non-fire factors.

[0139] (Fire alarm equipment) The above-described embodiment takes a wired system in which a photoelectric smoke detector is connected to a signal line from a receiver as an example. However, a wireless system in which the receiver and the photoelectric smoke detector are connected by a wireless line may also be used.

[0140] (From white smoke fire to black smoke fire) Further, in the case where the receiver in the above-described embodiment changes from a white smoke fire to a black smoke fire after a lapse of time, for example, the receiver may perform interlock control for the black smoke fire.

[0141] (Processing of receiver) Further, as the processing of fire alarm by the receiver in the above-described embodiment, the alarm and control treat white smoke fire and black smoke fire equally, but the recording and display of the log, etc. may be processed by distinguishing white smoke fire, black smoke fire, or non-fire.

[0142] (Storage of smoke judgment result) Further, the judgment result of white smoke fire, black smoke fire, or non-fire may be stored in the smoke detector.

[0143] (Others) Further, the present invention includes appropriate modifications that do not impair its object and advantages, and furthermore, is not limited by the numerical values shown in the above-described embodiment.

Explanation of reference numerals

[0144] 10: Receiver 12, 12-1 to 12-3: Signal line 14: Photoelectric smoke detector 16: Repeater 18: Area sound device 20: Exhaust device 22: Fire door 24: Fire extinguishing device 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 unit 44: Serial transfer bus 46: Display 48: Display unit 50: Operation unit 52: Acoustic alarm unit 54: Transfer unit 56: Transmission control unit 58: Fire alarm control unit 60: Interlock control unit 61: History processing unit 62: Sensor control unit 64: Transmission unit 66: Power supply unit 68: Light emission drive unit 70: Smoke detector unit 74, 76: Amplifier circuit unit 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: Caution alarm screen for non-fire causes 85: Fire mark 86: Fire representative display unit 88: Area display unit 90-`1 to 90-3: Type display unit 92, 116: Guidance display unit 94: Main acoustic stop button 96: Forward button 98-1 to 98-3: Interlock display 100: Area acoustic alarm sounding 102: Exhaust device operation 104: Fire door closing 106: Fire extinguishing device operation 108: Emergency broadcast in progress 110: Automatic reporting 120-1: White Smoke Fire Map Screen 120-2: Black Smoke Fire Map Screen 120-3: Non-Fire Map Screen 122: Transmission Order Display Section 124-1 to 124-3: Type Display Section 126-1 to 126-3: Overall Map 128-1 to 128-3: Detailed Map 130-1: White Smoke Fire Occurrence Area 130-2: Black Smoke Fire Occurrence Area 130-3: Non-Fire Cause Occurrence Area 132: Non-Fire Mark

Claims

1. A fire alarm facility that connects a predetermined terminal device to a receiver and identifies a plurality of types of predetermined events including a fire occurring in a predetermined warning area, comprising a display unit capable of switching between displaying an alarm screen for notifying the identified event and a map screen for displaying a map of the warning area, wherein in the map of the warning area displayed on the map screen, a symbol mark corresponding to the identified event is displayed at the location where the identified event occurred, and the symbol mark displayed on the map screen is the same symbol mark as the symbol mark corresponding to the identified event displayed on the alarm screen. The fire alarm facility is characterized by this.

2. The fire alarm facility according to Claim 1, wherein the map of the warning area displayed on the map screen includes an overall map showing the entire warning area and a detailed map showing a part of the warning area near the location where the identified event occurred, and the symbol mark is characterized by being displayed on the detailed map. The fire alarm facility is characterized by this.

3. A receiver that connects a predetermined terminal device and identifies a plurality of types of predetermined events including a fire occurring in a predetermined warning area, comprising a display unit capable of switching between displaying an alarm screen for notifying the identified event and a map screen for displaying a map of the warning area, wherein in the map of the warning area displayed on the map screen, a symbol mark corresponding to the identified event is displayed at the location where the identified event occurred, and the symbol mark displayed on the map screen is the same symbol mark as the symbol mark corresponding to the identified event displayed on the alarm screen. The receiver is characterized by this.

4. The receiver according to Claim 3, wherein the map of the warning area displayed on the map screen includes an overall map showing the entire warning area and a detailed map showing a part of the warning area near the location where the identified event occurred, and the symbol mark is characterized by being displayed on the detailed map. The receiver is characterized by this.

Images