JP2010198616A - Alarm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To give an effective intimidation to an arsonist to prevent arson by devising cooperation between flame detection and a lighting device. <P>SOLUTION: An alarm 10 is installed outdoor or semi-outdoor to monitor a fire in a monitoring area. A fire determination unit 26 determines a fire in a plurality of stages on the basis of a temporal change of a detection signal from a flame detection unit 14, and determines the occurrence of a fire when the fire determination result of each stage satisfies a predetermined condition. A lighting control unit 32 drives a lighting unit 16 on the basis of at least one of the fire determination results in a plurality of stages obtained by the fire determination unit 26, the first fire determination result at the time of lighting of a lighter, for example, which does not result in the determination of a fire. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to an alarm that monitors and deals with arson.

In recent years, since many people have died from house fires, it has become mandatory to install fire alarms for houses, and it is expected that the number of deaths from house fires will decrease.

On the other hand, according to statistics, the number of building fires is about 33,000 / year, and it is reported that arson and suspicion of arson are the most common at about 6,000 / year.

As a method of monitoring such a fire caused by arson, it is conceivable to install a flame detector that detects the flame caused by arson in a place where arson is likely to be fired, detect the fire caused by arson at an early stage, and give an alarm in the dwelling unit. Will be.

Conventionally, there is a flame detector that detects infrared rays in a unique wavelength band emitted from a flame. In order to improve the detection accuracy, a multi-wavelength flame detector that detects infrared rays in a plurality of wavelength bands and processes infrared signals of each wavelength to determine a flame is also known (Patent Document 1). Some use an ultraviolet sensor (Patent Document 2) and some use both ultraviolet and infrared rays (Patent Document 3). Further, there are those that detect the flicker of the flame, which is said to be distributed in the frequency band near several hertz, with a circuit filter or the like, and those that analyze various flicker patterns by calculation or the like (Patent Document 4).

There is an outdoor flame sensor that uses a combination of some of these flame detection principles, and there is also one that uses it as an arson sensor by combining it with a human body sensor (Patent Documents 5 and 6).

On the other hand, it is considered that lighting is effective in preventing crimes such as arson at night, and a system that drives a lighting device in conjunction with a human body sensor installed outdoors is well known.

Japanese Unexamined Patent Publication No. 2001-249047 Japanese Unexamined Patent Publication No. 06-290375 Japanese Unexamined Patent Publication No. 08-022584 Japanese Unexamined Patent Publication No. 2000-057456 Japanese Unexamined Patent Publication No. 2007-317135 Japanese Unexamined Patent Publication No. 2000-123266

However, in the conventional system that drives the lighting device in conjunction with the human body sensor, the intention is to discourage arson by turning on the lighting device and illuminating it when a suspicious person approaches the monitoring area. However, if the lighting device is turned on and nothing else happens, the arson cannot be discouraged.

In addition, in the conventional flame detector, a lighter or the like is used to light a pilot fire to detect and give an alarm, and the deterrent effect of directly discouraging the arson itself is sufficient. Not obtained.

An object of the present invention is to provide an alarm device that can prevent arson by more effectively threatening an arsonist by devising the cooperation between flame detection and a lighting device.

The present invention is an alarm device that is installed outdoors or semi-outdoors and monitors a fire in a monitoring area.
A flame detector that detects a flame and outputs a detection signal,
A fire judgment unit that determines a fire by dividing it into multiple stages based on the temporal change of the detection signal of the flame detection unit and determines the fire when the fire judgment result of each stage meets a predetermined condition.
Lighting equipment that illuminates part or all of the surveillance area,
Of the multiple stages of fire judgment judged by the fire judgment unit, the lighting control unit that drives the lighting device based on the result of at least one fire judgment before the fire is determined.
Is characterized by the provision of.

Here, the flame detector
An ultraviolet sensor that detects ultraviolet rays emitted from a flame and outputs a detection signal,
An infrared sensor that detects infrared rays emitted from a flame and outputs a detection signal,
Equipped with
The fire judgment unit performs a first stage fire judgment based on a detection signal from an ultraviolet sensor and a second stage fire judgment based on a detection signal from an infrared sensor, and a second stage fire judgment. Decide the fire based on the fire judgment result of the stage,
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the fire determination unit.

In addition, the flame detector
An ultraviolet sensor that detects ultraviolet rays emitted from a flame and outputs a detection signal,
An infrared sensor that detects infrared rays emitted from a flame and outputs a detection signal,
Equipped with
The fire judgment unit determines the first stage fire determination that the detection signal from the ultraviolet sensor exceeds the predetermined standard, and the second stage fire determination that the detection signal from the infrared sensor exceeds the predetermined standard. Judgment is made, and a fire is determined based on the result of the second stage fire judgment.
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the fire determination unit.

The flame detector
An ultraviolet sensor that detects ultraviolet rays emitted from a flame and outputs a detection signal,
An infrared sensor that detects infrared rays emitted from a flame and outputs a detection signal,
Equipped with
The fire judgment unit determines that the first stage fire judgment that determines that the detection signal from the ultraviolet sensor exceeds a predetermined standard and that a predetermined fluctuation frequency peculiar to the flame can be obtained from the detection signal from the infrared sensor. The fire is judged in the second stage, and the fire is determined based on the result of the fire judgment in the second stage.
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the determination unit.

In addition, the flame detector
Equipped with multiple infrared sensors that detect infrared rays of multiple different band wavelengths emitted from the flame and output the detection signal,
The fire judgment unit determines the flame from the correlation of the detection signals of the plurality of infrared sensors in the first stage, and the predetermined fluctuation frequency peculiar to the flame from the detection signals from at least the infrared sensors of the plurality of infrared sensors. The second stage fire judgment is performed to determine that the above is obtained, and the fire is determined based on the second stage fire judgment result.
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the fire determination unit.

In addition, the flame detector
A first infrared sensor that detects infrared rays of a predetermined wavelength corresponding to CO ₂ resonance radiation emitted from a flame and outputs a detection signal,
A second infrared sensor that detects infrared rays with wavelengths other than the specified wavelength corresponding to CO ₂ resonance radiation and outputs a detection signal,
Equipped with
The fire judgment unit determines that the detection signal from the first infrared sensor exceeds a predetermined standard and the detection signal from the second infrared sensor is equal to or less than the predetermined standard, and the first stage fire judgment and the first infrared ray. A second-stage fire judgment is performed to determine that a predetermined fluctuation frequency peculiar to the flame can be obtained from the detection signal from the sensor, and a fire is determined based on the second-stage fire judgment result.
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the fire determination unit.

The alarm device of the present invention further
A motion sensor that detects a person in the monitoring area and outputs a detection signal,
A person determination unit that determines the presence or intrusion of a person from the detection signal of the motion sensor,
And
The lighting control unit is based on the result of at least one fire determination before the fire is determined, out of the multiple stages of fire determination determined by the fire determination unit when the person determination unit determines the presence or intrusion of a person. To drive the lighting device.

The alarm device of the present invention further
The time acquisition unit that acquires the current time, and
A time management unit that sets a predetermined time zone as the control effective time zone of the lighting device,
And
The lighting control unit is a lighting device based on the result of at least one fire judgment before the fire is determined among the multiple stages of fire judgment determined by the fire judgment unit during the control effective time zone set by the time management unit. To drive.

The alarm device of the present invention further
A light / dark sensor that detects the brightness of the monitoring area and outputs a detection signal,
A light / dark judgment unit that determines the decrease in brightness of the monitoring area from the detection signal of the light / dark sensor,
And
The lighting control unit determines at least one of the multiple stages of fire determination determined by the fire determination unit when the brightness reduction of the monitoring area is determined by the light / dark determination unit before the fire is determined. Drive the luminaire based on the results.

After driving the lighting device, the lighting control unit stops driving the lighting device when the fire determination unit does not determine the fire.

The alarm device of the present invention is further provided with a communication unit for transmitting and receiving signals to and from other alarm devices.
When the lighting control unit starts driving the lighting device, the communication unit transmits a lighting drive start signal to another alarm device, while the communication unit receives a lighting drive start signal from the other alarm device. Drive the lighting equipment.

The alarm device of the present invention is further provided with a communication unit for transmitting and receiving signals to and from other alarm devices.
When the fire determination unit determines a fire, the lighting control unit transmits a lighting drive start signal to another alarm by the communication unit, while the communication unit receives a lighting drive start signal from another alarm by the communication unit. Drive your own lighting device.

When the lighting control unit receives a lighting drive start signal from another alarm, the lighting control unit drives its own lighting device after a predetermined delay time has elapsed from the signal reception.

When the lighting control unit receives a lighting drive stop signal from another alarm, the lighting control unit stops driving after continuing to drive its own lighting device for a predetermined period.

According to the alarm device of the present invention, it is possible to perform a more effective threat to an arsonist by driving a lighting device immediately after ignition of a lighter or the like is recognized, not simply by detecting a human body. can.

In addition, after driving the lighting device, detailed fire judgment is performed in multiple stages until the fire is determined from the flame detection signal and an alarm is issued, so it is possible to threaten immediately, but it is annoying. The possibility of false alarms does not increase.

Further, by using a motion sensor, a light / dark sensor, or a time zone management together, it is possible to further narrow down the driving conditions of the lighting device and suppress unnecessary lighting control.

A block diagram showing a first embodiment of an alarm according to the present invention for determining a fire from the fluctuation frequencies of ultraviolet rays, infrared rays, and flames. Graph diagram showing the wavelength distribution of light energy radiated from a flame The flowchart which showed the fire monitoring process by 1st Embodiment of FIG. A block diagram showing a second embodiment of an alarm according to the present invention for determining a fire from a multi-wavelength of infrared rays and a fluctuation frequency of a flame. The flowchart which showed the fire monitoring process by 2nd Embodiment of FIG. A block diagram showing a third embodiment of an alarm device according to the present invention in which a motion sensor is used in combination. The flowchart which showed the fire monitoring process by the 3rd Embodiment of FIG. A block diagram showing a fourth embodiment of an alarm device according to the present invention in which an effective time zone for driving a lighting device is set. The flowchart which showed the fire monitoring process by 4th Embodiment of FIG. A block diagram showing a fifth embodiment of an alarm device according to the present invention in which a light / dark sensor is used in combination. FIG. 5 is a flowchart showing the fire monitoring process according to the fifth embodiment of FIG. A block diagram showing a sixth embodiment of an alarm device according to the present invention that drives a lighting device in conjunction with another alarm device. FIG. 5 is a flowchart showing the fire monitoring process according to the sixth embodiment of FIG.

FIG. 1 is a block diagram showing a first embodiment of an alarm according to the present invention, and the first embodiment is characterized in that a fire is determined from ultraviolet rays, infrared rays, and fluctuation frequencies of flames. And.

In FIG. 1, the alarm 10 is installed on the wall surface of a building such as an eaves, a garbage collection place, a storeroom, a multi-tenant building, an apartment staircase, a landing, etc., which are said to be easily set on fire.

The alarm device 10 is provided with a processor 12, a flame detection unit 14, a lighting device 16, an acoustic alarm unit 18, and a signal transfer unit 20.

In this embodiment, the flame detection unit 14 is provided with an ultraviolet sensor 22 and an infrared sensor 24. The ultraviolet sensor 22 uses, for example, a phototube for detecting ultraviolet rays known as UV TRON (registered trademark), detects ultraviolet rays radiated from a flame through a detection circuit (not shown), and outputs a detection signal.

For example, a pyroelectric sensor or the like is used as the infrared sensor 24, which detects infrared rays output from a flame and outputs a detection signal through a detection circuit (not shown).

FIG. 2 is a graph showing the wavelength distribution of light energy radiated from a flame. The distribution of the wavelength spectrum from the flame is distributed in the infrared region shown in FIG. 2 from the ultraviolet region to the visible region. In the spectrum distribution in this infrared region, infrared rays having a peak level near 4.3 (μm) due to resonance radiation of carbon dioxide gas (CO ₂ ) generated at the time of combustion are obtained as a spectrum peculiar to a flame. Apart from this, it is known that ultraviolet rays of about 200 (nm) are radiated from the flame.

Referring to FIG. 1 again, the illuminating device 16 includes a illuminating device 16 such that the alarm device 10 illuminates a part or all of the warning area monitored by the flame detection unit 14. As the lighting device 16, for example, a white LED or the like can be used, and continuous lighting or intermittent lighting can be performed as needed. For simplicity, the lighting drive circuit is not shown.

The acoustic alarm unit 18 is provided with a buzzer, a speaker, and the like, and outputs an alarm sound as needed. The report transfer unit 20 outputs a fire transfer signal when a fire is determined by the alarm device 10 to an external device such as a monitoring panel installed in a dwelling unit to give a fire alarm.

The processor 12 includes a CPU, ROM, RAM, AD conversion port, and various input / output ports, and realizes the functions of the fire determination unit 26 and the lighting control unit 32 by executing a program by the CPU.

The fire determination unit 26 determines a fire by dividing it into a plurality of stages from the detection signal from the flame detection unit 14, and determines the fire when the fire determination result of each stage satisfies a predetermined condition. In the case of the embodiment of FIG. 1, since the flame detection unit 14 is provided with the ultraviolet sensor 22 and the infrared sensor 24, for example, a fire is determined in the following three stages to determine a fire.

(1) In the first stage fire determination, it is determined that the detection signal from the ultraviolet sensor 22 exceeds a predetermined reference.

(2) In the second stage fire determination, it is determined that the detection signal from the infrared sensor 24 exceeds a predetermined reference.

(3) In the third stage fire determination, the frequency is analyzed from the detection signal of the infrared sensor 24, and it is determined that a frequency signal of about 2 Hz, which is known as a predetermined fluctuation frequency peculiar to the flame, can be obtained at a predetermined value or higher. ..

Here, in general, an ultraviolet sensor can detect ultraviolet rays in a very short time from a small flame generated by a lighter or the like. Infrared sensors also detect relatively medium-sized flames. Then, in order to analyze the signal from the infrared sensor, for example, the flickering frequency of the flame is as slow as around 2 Hz, so that a predetermined processing time is required.

Corresponding to the fire determination over these three stages, the fire determination of the first stage and the fire determination of the second stage are performed by the flame determination unit 28. Then, the fire determination in the third stage is performed by the flicker determination unit 30.

When the flicker frequency component is extracted by the circuit filter of the infrared detection circuit, the second stage fire determination and the third stage fire determination are performed at the same time, and the flicker determination unit 30 can be omitted at this time. ..

The lighting control unit 32 drives the lighting device 16 based on the result of at least one fire determination before the fire is determined among the plurality of stages of fire determination determined by the fire determination unit 26. In the case of the embodiment of FIG. 1, since the fire determination is performed in three stages as described above, when it is determined that the detection signal from the ultraviolet sensor 22 in the first stage exceeds a predetermined threshold value, The lighting device 16 is driven to illuminate the warning area.

The timing for driving the lighting device 16 by the lighting control unit 32 is such that when an arsonist invades the warning area and ignites the writer, the detection signal of the ultraviolet sensor 22 having good sensitivity to a small-scale flame is used. When the arsonist exceeds a predetermined threshold, the lighting device 16 is driven, and as soon as the arsonist ignites with a writer or the like, the alarm device 10 illuminates the arsonist, whereby the arsonist lights up at the timing when the arsonist ignites. , It is possible to exert an effective threat to the arsonist and to discourage the arson.

On the other hand, if the lighting control unit 32 does not reach a fire determination even after a predetermined time has elapsed after the first stage fire determination based on the detection signal of the ultraviolet sensor 22 is performed by the fire determination unit 26, The driving lighting device will be stopped.

FIG. 3 is a flowchart showing an outline of the fire monitoring process according to the first embodiment of FIG. 1 as an example, and is a control process of the fire determination unit 26 and the lighting control unit 32 by the processor 12. In FIG. 3, when the power of the alarm device 10 is turned on, the processor 12 executes initialization and self-diagnosis processing in step S1, and if normal, proceeds to step S2, and the ultraviolet ray detection value from the ultraviolet sensor 22 is a predetermined threshold value. We are monitoring whether or not it is above.

When the detection value from the ultraviolet sensor 22 becomes equal to or higher than the threshold value, the process proceeds to step S3, and since it is the fire determination result of the first stage, the lighting control unit 32 drives the lighting device 16 to illuminate the warning area. In this case, the driving of the lighting device may be continuous lighting or intermittent lighting in order to enhance the threatening effect. Further, if necessary, the acoustic alarm unit 18 may emit a relatively low-volume alarm sound or a short-time alarm sound to enhance the threatening effect against the arsonist at the same time as lighting.

Subsequently, in step S4, a fire determination in the second stage of whether or not the detected value of the infrared sensor 24 is equal to or higher than a predetermined threshold value is performed, and when the detected value of the infrared sensor 24 is equal to or higher than the threshold value, the process proceeds to step S6. A flicker frequency analysis will be performed.

If the detection value of the infrared sensor is less than the predetermined value in step S4, the passage of the predetermined time is checked in step S5, and if the predetermined time elapses without the infrared detection value exceeding the reference value, step S12 is performed. It will advance and stop the driving lighting device 16.

In the flicker frequency analysis in step S6, the detection signal from the infrared sensor 24 is frequency-analyzed by, for example, a fast Fourier transform, and whether or not the flicker frequency characteristic peculiar to the flame can be obtained as the analysis result in step S7, that is, the flame peculiarity. It is determined whether or not the flicker frequency can be obtained, and if the flicker frequency peculiar to the flame is obtained, the process proceeds to step S9 assuming that the determination result of the third stage is obtained, the fire is determined, and the transfer unit 20 is determined in step S10. It is output to an external alarm panel or sound device to give a fire alarm.

Here, if the flame-specific flicker frequency is not determined in step S7, the passage of a predetermined time is checked in step S8, and if the predetermined time elapses without determining the flame-specific flicker frequency, step S12 is performed. Proceed and stop the driving lighting device 16.

When the flicker frequency peculiar to the flame is determined in step S7, the fire determination process is performed in step S9, the fire is transferred in step S10, and then the recovery operation is awaited in step S11, and the recovery operation is performed. Then, after stopping the driving of the lighting device 16 in step S12, the monitoring of the detection signal from the ultraviolet sensor 22 in step S2 is started again.

In the present embodiment, the signal wavelength band extracted from the infrared sensor 24 has been described as an example around 4.3 (μm), but another wavelength band may be selected, or a combination with two wavelength bands, or 3 The first stage fire determination may be performed based on the signal from the wavelength band. The combination of these wavelengths can be appropriately selected from known techniques and the like. Further, the second fire determination by flicker analysis can be appropriately selected from known techniques and the like.

FIG. 4 is a block diagram showing a second embodiment of the alarm device according to the present invention. In this second embodiment, it is determined that a fire is determined from a multi-wavelength of infrared rays and a fluctuation frequency of a flame. It is a feature.

In FIG. 4, the alarm device 10 is provided with a processor 12, a flame detection unit 14, a lighting device 16, an acoustic alarm unit 18, and a transfer unit 20, and this point is basically the first embodiment of FIG. Although it is the same as the embodiment, the flame detection unit 14 is provided with the first infrared sensor 24a and the second infrared sensor 24b in the second embodiment.

The first infrared sensor 24a detects infrared rays near the wavelength λ1 = 4.3 (μm), which is the peak level due to CO ₂ resonance peculiar to flames in the infrared region shown in FIG. 2, for example, on the light incident side. Infrared rays of CO ₂ resonance wavelength are arranged by arranging a λ1 optical wavelength filter 36a for incident infrared rays having a CO ₂ resonance wavelength λ1 = 4.3 (μm) as a central wavelength, following the translucent window 34 arranged in. Is detected.

On the other hand, the second infrared sensor 24b is an infrared sensor that detects infrared rays having a predetermined wavelength λ2 outside the CO2 resonance wavelength λ1 = 4.3 (μm) in FIG. 2, for example, λ2 = 5 (μm). Therefore, a λ2 optical wavelength filter 36b that transmits infrared rays near the wavelength λ2 = 5 (μm) is arranged following the translucent window 34 so as to detect infrared rays near λ2 = 5 (μm). As the translucent window 34, for example, sapphire glass or the like can be applied. Also in the embodiment of FIG. 1, an appropriate translucent window capable of transmitting ultraviolet rays and infrared rays can be used.

The fire determination unit 26 provided as a function realized by executing a program by the CPU of the processor 12 is provided with a flame determination unit 28 and a flicker determination unit 30. In the flame determination unit 28, an infrared detection signal having a CO ₂ resonance wavelength λ1 was obtained from the first infrared sensor 24a provided in the flame detection unit 14 to a predetermined value or more, and the CO ₂ resonance wavelength λ1 was deviated from the second infrared sensor 24b. The first stage fire judgment is performed on the condition that the infrared rays of λ2 = 5 (μm) are equal to or less than the predetermined value.

When the flame determination unit 28 performs the first stage fire determination, the lighting control unit 32 drives the lighting device 16. When the flame determination unit 28 completes the first stage fire determination, the flicker determination unit 30 performs the second stage fire determination for determining the flicker frequency distribution characteristic and the like centering on the flame-specific flicker frequency around 2 Hz. When the flicker frequency characteristic peculiar to the flame is determined in the fire determination in the second stage, the fire is determined and the fire transfer signal is output from the transfer unit 20 to an external monitoring panel or the like to give a fire alarm. This flicker determination may be performed only on the signal of λ1 from the infrared sensor 24a.

FIG. 5 is a flowchart showing the fire monitoring process according to the second embodiment of FIG. 4, which is the control process by the processor 12 of FIG. In FIG. 5, when the power of the alarm device 10 is turned on, the processor 12 initializes and self-diagnoses in step S21, and then in step S22, the first infrared sensor 24a and the second infrared sensor provided in the flame detection unit 14 It is determined whether or not the wavelength detection pattern by 24b matches the flame.

Specifically, the detection signal of the first infrared sensor 24a and the detection signal of the second infrared sensor 24b are read from the AD conversion port of the processor 12, and the detection signal of the CO ₂ resonance wavelength λ1 which is the detection signal of the first infrared sensor 24a. The first step of matching the infrared detection pattern of the flame when the infrared detection signal of the λ2 wavelength deviating from the CO ₂ resonance wavelength of the second infrared sensor 24b is equal to or less than the predetermined standard. The fire is determined, the process proceeds to step S23, the lighting device 16 is driven, and the warning area is illuminated. At this time, if necessary, the acoustic alarm unit 18 may emit a relatively low-volume alarm sound or a short-time alarm sound to further enhance the threatening effect against the arsonist.

Subsequently, in step S24, the flicker frequency analysis which is the second stage fire determination is performed, and when the flicker frequency characteristic peculiar to the flame is determined from the analysis result in step S24, the process proceeds to step S27, and it is determined that the fire is fire, and in step S28. A fire detection signal is output from the transfer unit 20 to an external monitoring panel, an acoustic device, or the like to give an alarm.

On the other hand, if the flicker frequency peculiar to the flame is not determined in step S25, the passage of a predetermined time is checked in step S26, and when the predetermined time elapses, the process proceeds to step S30, and in this case, it is not a fire. Stop driving the lighting device.

Further, after the fire is transferred and an alarm is given in step S28 based on the fire determination, the presence or absence of the restoration operation is determined in step S29, and when the restoration is performed, the lighting device 16 driven in step S30 is stopped. Then, the process returns to the first stage fire determination by the infrared sensors 24a and 24b in step S22.

In the present embodiment, the combination of around 4.3 (μm) and around 5 (μm) as the signal wavelength band extracted from the infrared sensors 24a and 24b has been described as an example, but for example, around 4.3 (μm) and 3. It may be a combination of other wavelength bands such as around 8 (μm), and for signals from three wavelength bands near 3.8 (μm), 4.3 (μm), and 5 (μm). Based on this, the first stage fire judgment may be performed. The combination of these wavelengths can be appropriately selected from known techniques and the like. Further, the second fire determination by flicker analysis can be appropriately selected from known techniques and the like.

FIG. 6 is a block diagram showing a third embodiment of the alarm unit according to the present invention, and the third embodiment is characterized in that a motion sensor is used in combination.

In FIG. 6, the alarm device 10 is provided with a processor 12, a flame detection unit 14, a lighting device 16, an acoustic alarm unit 18, and a transfer unit 20, and the configuration is the same as that of the first embodiment of FIG. In addition to this, a motion sensor 38 is further provided. Again, a translucent window that transmits each detection wavelength can be arranged on the front surface of each sensor, if necessary.

The motion sensor 38 detects infrared rays emitted from a human body that has entered or exists in the caution area and outputs a detection signal. As the motion sensor 38, an infrared sensor using a pyroelectric element can be used. Therefore, the motion sensor 38 can also be used as the detection signal of the infrared sensor 24 by selecting a wavelength band or the like.

The fire determination unit 26 of the processor 12 is provided with a flame determination unit 28 and a flicker determination unit 30, and in this embodiment, when the detection signal from the ultraviolet sensor 22 in the flame determination unit 28 becomes a predetermined value or more. The first-stage fire determination for determining a fire and the subsequent determination by the flicker determination unit 30 for determining the flicker frequency peculiar to the flame from the detection signal from the infrared sensor 24 are the second-stage fire determination. A fire is judged.

Along with the provision of the motion sensor 38, the processor 12 is further provided with a human determination unit 40. The human determination unit 40 determines the intrusion of a person or the presence of a person in the caution area from the detection signal from the motion sensor 38.

The lighting control unit 32 drives the lighting device 16 based on the determination result of the fire determination unit 26 and the determination result of the person determination unit 40. That is, when the flame determination unit 28 provided in the fire determination unit 26 obtains the fire determination result of the first stage in which the detection signal from the ultraviolet sensor 22 is equal to or higher than a predetermined reference, the human sensor 38 from the human determination unit 40. When the presence of an intruder or a person in the warning area is determined based on the detection signal of the above, the lighting device 16 is driven to illuminate the warning area. That is, for example, when the human sensor 38 detects the intrusion of the human body into the caution area, and then a fire (flame) is detected in the first fire determination due to the ignition of a lighter or the like by the signal from the ultraviolet sensor, the lighting device 16 Drive to illuminate the alert area.

By using the determination result of the presence of an intruder or a person in the caution area together with the control of the lighting device 16 in this way, even if there is an erroneous determination of the fire determination in the first stage in the fire determination unit 26, the person determination unit 40 When there is no person from the determination result according to the above, it is possible to prevent the lighting device 16 from being accidentally driven by the lighting control unit 32, and it is possible to suppress unnecessary lighting control.

FIG. 7 is a flowchart showing an outline of a fire monitoring process example according to the third embodiment of FIG. 6, which is a control process by the processor 12 of FIG. In FIG. 7, when the power of the alarm device 10 is turned on, the processor 12 performs initialization and self-diagnosis in step S31, proceeds to step S32 if there is no error, and is detected by the motion sensor 38 by the human determination unit 40. It is determined whether or not there is an intruder in the warning area or whether or not there is a person based on the presence or absence of the motion sensor detection, and when the determination result of the presence or absence of the motion sensor detection is obtained, the process proceeds to step S33 and the outside line sensor 22 A first-stage fire determination is performed in which whether or not the detected value from is equal to or higher than a predetermined threshold value.

Subsequently, the process proceeds to step S35, the lighting device 16 can be driven to illuminate the warning area, and the lighting device 16 can be driven immediately after ignition of the lighter or the like to intimidate or evict the arsonist.

If it is not determined in step S33 that the ultraviolet sensor is detected, a predetermined time elapse is waited in step S34, and if there is still no ultraviolet sensor detection, the process returns to the first stage fire determination in step S32.

Further, since a general motion sensor intermittently outputs a detection signal when a person operates in the monitoring area, step S34 is deleted, and if there is no ultraviolet sensor detection in step S33, the process directly returns to step S32. You may do so. Further, the detection determination of the ultraviolet sensor and the detection determination of the human body may be performed in the reverse order.

After driving the lighting device 16 in step S35, the flicker frequency analysis by the signal from the infrared sensor 24, which is the second stage fire determination, is performed in step S36, and the flicker frequency characteristic peculiar to the flame is determined in step S38. , The fire is determined in step S39, the fire is transferred in step S40, and a fire alarm is issued from an external monitoring panel, an acoustic device, or the like.

Subsequently, when the restoration operation is determined in step S41, the driving of the lighting device 16 is stopped in step S42, and the motion sensor monitoring state of step S32 is restored again. If the flicker frequency peculiar to the flame is not determined from the flicker frequency analysis result in step S38, the flicker frequency peculiar to the flame is not determined in step S37. The drive of the device 16 is stopped, and the process returns to step S32.

FIG. 8 is a block diagram showing a fourth embodiment according to the present invention, and the fourth embodiment is characterized in that an effective time zone for driving the lighting device is set and managed.

In FIG. 8, the alarm device 10 is provided with a processor 12, a flame detection unit 14, a lighting device 16, an acoustic alarm unit 18, and a transfer unit 20, which is the same as the first embodiment of FIG. In addition to this, a time acquisition unit 42 is further provided.

The time acquisition unit 42 is provided with a calendar IC or the like that generates and acquires time information by the alarm device 10 itself, or receives time signal information from the outside and synchronizes the time, such as a radio-controlled clock, to obtain the time information. An appropriate time acquisition means can be used, such as providing an IC to generate or obtaining time information from an external device having a clock function. Further, even if it is not detailed time information, it suffices to provide a means capable of acquiring time information necessary for whether or not lighting control is possible, such as a time zone.

The processor 12 is provided with a time management unit 44 corresponding to the time acquisition unit 42, in addition to the fire determination unit 26 and the lighting control unit 32, as a function realized by executing a program by the CPU. The fire determination unit 26 is provided with a flame determination unit 28 and a flicker determination unit 30, and the flame determination unit 28 determines that a fire is a fire when the detection signal from the ultraviolet sensor 22 is equal to or higher than a predetermined standard. The flicker determination unit 30 performs the second stage fire determination of determining a fire by obtaining the flicker frequency characteristic peculiar to the flame by frequency analysis of the detection signal from the infrared sensor 24.

The time management unit 44 sets a control effective time zone for driving the lighting device 16 by the lighting control unit 32. The lighting control unit 32 has a control effective time set by the time management unit 44 as the current time acquired from the time acquisition unit 42 when the fire determination result of the first stage is obtained by the flame determination unit 28 of the fire determination unit 26. If it is in the band, the lighting device 16 is driven, and if it is not in the control effective time zone, the lighting device 16 is not driven.

As the control effective time zone of the lighting device 16 set by the time management unit 44, a night time zone is set. Of course, it is also possible to set a time zone including a daytime zone as needed, such as when the monitoring area is always in a dark place.

FIG. 9 is a flowchart showing a schematic example of the fire monitoring process according to the fourth embodiment of FIG. 8, and is the control process by the processor 12 of FIG. In FIG. 9, when the power of the alarm device 10 is turned on, the processor 12 executes initialization and self-diagnosis processing in step S51, and if there is no error, the detected value from the ultraviolet sensor 22 in step S52 is equal to or higher than a predetermined reference. The first stage of fire judgment is performed based on whether or not the fire is determined.

If it is determined in step S52 that the time is equal to or higher than the predetermined reference, the process proceeds to step S53, and it is determined whether or not the current time acquired from the time acquisition unit 42 is the effective time zone of the lighting control set by the time management unit 44. If it is an effective time zone, the process proceeds to step S54, the lighting device 16 is driven, the monitoring area is illuminated, and the arsonist is threatened and evacuated.

If the lighting control is not in the effective time zone in step S53, the lighting device in step S54 is not driven. This is useless because even if the lighting device 16 is turned on in the fire determination result of the first stage in the daytime, the surroundings are bright and there is no threatening effect due to the lighting of the lighting device 16. The lighting device 16 is not driven. However, a low-volume acoustic alarm or a short-time acoustic alarm may be given.

Subsequently, in step S55, the fire determination in the second stage, which is the flicker frequency analysis, is performed from the detection signal of the infrared sensor 24, and when the flame-specific flicker frequency is determined in step S56, the fire is determined in step S58, and the fire is determined in step S59. A fire alarm is issued from an external monitoring panel, sound device, etc. by transferring the report, and if there is a fire recovery in step S60, the driving of the lighting device 16 is stopped in step S61, and the monitoring returns to step S52 again. ..

If the flicker frequency peculiar to the flame is not determined in step S56, the elapse of a predetermined time is waited in step S57, and if the lighting device is driven, the driving of the lighting device 16 is stopped in step S61. After that, the process returns to the monitoring in step S52.

FIG. 10 is a block diagram showing a fifth embodiment of the alarm device according to the present invention, and the fifth embodiment is characterized in that a light / dark sensor is used in combination. In FIG. 10, the alarm device 10 is provided with a processor 12, a flame detection unit 14, a lighting device 16, an acoustic alarm unit 18, and a transfer unit 20, and further, in the fifth embodiment, a light / dark sensor 46 is provided. .. The light / dark sensor 46 detects the brightness of the warning area and outputs a detection signal.

In addition to the fire determination unit 26 and the lighting control unit 32, the processor 12 is provided with a light / dark determination unit 48 corresponding to the light / dark sensor 46. The brightness determination unit 48 determines the decrease in brightness of the monitoring area from the detection signal of the brightness sensor 46.

The lighting control unit 32 controls the lighting device 16 based on the fire determination result of the first stage by the flame determination unit 28 provided in the fire determination unit 26 and the determination result by the light / dark determination unit 48. That is, the lighting control unit 32 is a lighting device when the first stage fire determination result is obtained by the flame determination unit 28 of the fire determination unit 26 when the brightness reduction of the monitoring area is determined by the light / dark determination unit 48. Drive 16 to illuminate the surveillance area and threaten the arsonist to leave.

By using the light / dark sensor 46 together in this way, it is possible to avoid unnecessarily driving the lighting device 16 in a bright state of the monitoring area.

FIG. 11 is a flowchart showing a schematic example of the fire monitoring process according to the fifth embodiment of FIG. 10, and is the control process by the processor 12 of FIG.

In FIG. 11, when the power of the alarm device 10 is turned on, the processor 12 initializes and self-diagnoses in step S71, and then proceeds to step S72 if there is no error, and the detected value from the ultraviolet sensor 22 is equal to or higher than a predetermined threshold value. The first stage fire judgment is performed to determine whether or not the fire is.

When the fire determination result exceeds the threshold value, the process proceeds to step S73, and it is checked whether or not the brightness determination unit 48 determines the brightness decrease based on the detection signal from the brightness sensor 46 at that time, and the brightness decrease is determined. If so, the process proceeds to step S74, and the lighting device 16 is driven to illuminate the warning area, thereby threatening and evacuating the arsonist. In the daytime when the decrease in brightness is not determined, there is no threatening effect even if the lighting is turned on, so the driving of the lighting device in step S74 is skipped.

Since the output of the light / dark sensor changes in the "bright" direction after the fire is generated, the signal from the light / dark sensor is acquired at a predetermined cycle and stored in a storage unit (not shown) by taking a moving average or the like. When a fire occurs in the fire determination of 1, the light / dark determination may be made by referring to it. Alternatively, the light / dark determination may be performed in advance, and the result may be stored in a storage unit and read out.

Subsequently, in step S75, the flicker determination unit 30 performs flicker frequency analysis from the detection signal of the infrared sensor 24 by fast Fourier transform or the like, and in step S76, the second stage fire determination for determining the flicker frequency characteristic peculiar to the flame is performed. When the flicker frequency characteristic peculiar to the flame is determined, the fire is determined in step S78, and the transfer signal is output from the transfer unit 20 to the external monitoring panel, acoustic device, etc. in step S79 to issue a fire alarm. Then, after waiting for the restoration operation in step S80 and stopping the driving of the lighting device in step S81, the process returns to the monitoring in step S72.

FIG. 12 is a block diagram showing a sixth embodiment of the alarm device according to the present invention, and the sixth embodiment is characterized in that the lighting device is driven in conjunction with another alarm device.

In FIG. 12, the alarm device 10A forms an interlocking group with the alarm device 10B installed at another place, for example. In addition to the processor 12, the flame detection unit 14, the lighting device 16, the acoustic alarm unit 18, and the transfer unit 20, the alarm device 10A is newly provided with a wireless communication unit 50 provided with an antenna 52.

The wireless communication unit 50 includes, for example, a transmission / reception circuit conforming to a low power radio station in the 400 MHz band, and can transmit / receive signals to / from another alarm device 10B. The format of the transmission / reception signal is composed of a source code, a group code, event information indicating the transmission content, and an error detection code such as a checksum, which are preset in the alarm devices 10A and 10B.

In order to form the interlocking group, the alarm device 10A stores in advance a plurality of alarm device IDs including other alarm devices 10B constituting the interlocking group as source codes as table information in the memory. Therefore, when the source code included in the received signal received by the wireless communication unit 50 matches the previously registered source code, it is determined to be a signal from another alarm device belonging to the same interlocking group, and this is processed. Will be done.

Further, instead of the source code, a group code may be registered, and the signal may be processed by collating with the group code included in the received signal and determining that the signal is from another alarm belonging to the interlocking group. ..

The fire determination unit 26 provided in the processor 12 is provided with a flame determination unit 28 and a flicker determination unit 30, and when the detection signal from the ultraviolet sensor 22 becomes equal to or higher than a predetermined reference in the flame determination unit, a fire is determined. A second stage fire determination is performed, the detection signal from the infrared sensor 24 is frequency-analyzed by the flicker determination unit 30 by high-speed Fourier conversion or the like, and a fire is determined when the characteristic of the flicker frequency peculiar to the flame is determined. A stage fire judgment is being made.

The lighting control unit 32 has a fire determination result of the first stage in its own fire determination unit 26, that is, a first stage fire when the fire detection signal from the infrared sensor 24 by the flame determination unit 28 exceeds a predetermined reference. When the determination result is obtained, the lighting device 16 is driven.

In addition to this, when the lighting device 16 is driven, the lighting control unit 32 transmits a wireless signal that functions as a lighting drive start signal to the other alarm device 10B by the wireless communication unit 50. This wireless signal is wirelessly transmitted by creating an event message having a transmission signal format in which the source code, group code, and event content of the alarm device 10A are used as the lighting drive start signal.

Further, when the lighting control unit 32 receives a radio signal from another alarm device 10B or the like by the wireless communication unit 50, the lighting control unit 32 is required to match the source code decoded from the received signal with the source code registered in the memory table. When the event content is decoded and the lighting drive start is determined from the event content, the own lighting device 16 is driven.

Regarding the driving of the lighting device 16 by receiving the lighting drive start signal from the other alarm device 10B, the lighting device 16 is driven after a predetermined delay time has elapsed. It seems that the arsonist moved to the next place by driving the lighting device 16a in conjunction with the alarm 10A after a certain delay time has passed after the flame due to the arson was detected by the other alarm 10B. I try to increase the threatening effect in anticipation of such cases.

Further, if the lighting control unit 32 is provided in the fire determination unit 26 after driving its own lighting device 16 and the fire determination in the second stage cannot be obtained by the flicker determination unit 30, the fire is not determined. An event message to be a lighting drive stop signal is created, transmitted from the wireless communication unit 50 to another alarm 10B, and the drive of the lighting device in the other interlocked alarm 10B is stopped.

This is because when the lighting control unit 32 receives a lighting drive start signal from another alarm device 10B and drives the lighting device 16 in an interlocking manner, and then receives a lighting drive stop signal from the other alarm device 10B, the interlocking driving lighting is performed. It means to stop the device 16.

At this time, regarding the stop of the lighting device 16 interlocked with the lighting drive stop signal from the other alarm device 10B, the lighting device 16 is not stopped immediately upon receiving the lighting drive stop signal, but after the lighting drive is continuously held for a predetermined time, the lighting device 16 is stopped. The lighting device 16 is stopped.

As a result, in the unlikely event that the arsonist is arsoning while moving from place to place, the arsonist will be evacuated by lighting drive by the first stage flame detection with another alarm device 10B, and the fire will not be determined. If the arsonist is in a state and then moves to another place, for example, the place where the alarm device 10A is installed, if the lighting device 16 is immediately stopped by stopping the lighting drive, the arsonist is illuminated by the alarm device. Since it will notify the threatening effect, the interlocking driving lighting device will not stop immediately, but will continue to hold the lighting driving, so that the moving arsonist will approach the warning area where the alarm 10A is installed. Prevent things from happening.

It may take a certain amount of time for the arsonist to move from the warning area of one alarm to the warning area of another alarm, in order to further avoid wasting power because the lighting drive starts too early. Depending on the result of the first fire judgment, only the own lighting device is driven and the lighting is not linked to the other alarms, and after the fire is determined after the second fire judgment, the lighting is driven to the other alarm (interlocking). You may let it.

FIG. 13 is a flowchart showing a schematic example of the fire monitoring process according to the sixth embodiment of FIG. 11, and is the control process by the processor 12 of FIG.

In FIG. 13, when the power of the alarm device 10A is turned on, the processor 12 initializes and self-diagnoses in step S91, and if there is no error, proceeds to step S92, and whether the detected value of the ultraviolet sensor 22 exceeds a predetermined reference. A fire determination in the first stage of whether or not is performed is performed, and if the fire exceeds a predetermined standard, the process proceeds to step S93, and the lighting control unit 32 drives the own lighting device 16 to intimidate and move out the arsonist. Let me.

Subsequently, in step S94, a lighting drive start signal is transmitted to the other alarm device 10B, and the lighting device is interlockedly driven by the other alarm device 10B.

Subsequently, in step S95, frequency analysis is performed by high-speed Fourier transform of the detection signal from the infrared sensor 24 by the flicker determination unit 30, and when the flicker frequency peculiar to the flame is determined in step S96, the fire is determined in step S98, and the step In S99, the fire transfer signal is output from the transfer unit 20 to an external control panel, an acoustic device, or the like to give a fire alarm. Instead of transmitting the transfer signal by the transfer unit 20, the wireless communication unit 50 may transmit a fire transfer signal to an alarm panel, an acoustic device, or the like having a wireless communication function to give an alarm.

Subsequently, when the restoration operation is determined in step S100, the driving of the lighting device is stopped in step S101, and the lighting drive stop signal is transmitted from the wireless communication unit 50 to the other alarm device 10B.

If the determination of the flicker frequency of the flame cannot be obtained after driving the lighting device 16 in step S96, the elapse of a predetermined time is awaited in step S97, and the determination of the flicker frequency peculiar to the flame cannot be obtained during that time. In that case, the process proceeds to step S101, and at the same time as stopping the driving of the lighting device 16, a lighting drive stop signal is transmitted to the other alarm device 10B.

On the other hand, if the detection value from the ultraviolet sensor 22 is less than the predetermined reference in step S92, the process proceeds to step S102 to check whether or not the lighting drive start signal is received from another alarm, and this is received. Then, the process proceeds to step S103, and after a predetermined delay time has elapsed, the lighting device 16 is interlocked and driven in step S104.

Subsequently, in step S105, the presence / absence of reception of the lighting drive stop signal from another alarm is checked, and when this is received, the driving of the lighting device 16 is stopped in step S107 after waiting for the elapse of a predetermined time in step S106. Will be done.

In the third embodiment of FIG. 6, the fourth embodiment of FIG. 8, the fifth embodiment of FIG. 10, and the sixth embodiment of FIG. 12, the detection value of the infrared sensor 22 by the flame determination unit 28 An example is a two-stage judgment of a first-stage fire judgment in which is equal to or higher than a predetermined standard, and then a second-stage fire judgment in which the flame-specific flicker frequency is determined by frequency analysis of the detection signal from the infrared sensor 24. However, the third embodiment also relates to the three-stage fire determination in the first embodiment of FIG. 1 or the two-stage fire determination in which the two infrared wavelengths and the flicker determination in the second embodiment of FIG. 5 are combined. It is possible to apply the embodiment of the combined use of the motion sensor, the lighting control according to the time, the combined use of the light / dark sensor, and the interlocking drive of the lighting with other alarms according to the sixth embodiment.

The recovery determination in each flowchart of the embodiments shown so far may be determined by receiving a restoration instruction from the terminal of the fire transfer destination, or by providing a restoration button in the alarm device of the present invention. Alternatively, it may be determined that the fire has been restored when it is determined that the fire condition has been resolved by performing a fire determination again after the fire is determined.

Further, of course, in each embodiment, when the fire is determined and the fire is transferred, an alarm can be output from the acoustic alarm unit provided in the alarm device of the present invention.

Further, in the fire determination over a plurality of stages of the fire determination unit in the present invention, a combination in which the first stage is the determination by the wavelength and the second stage is the determination by the flicker is taken as an example, but the present invention is limited to the above embodiment. If it is a fire judgment that determines the stage of expanding from a small stage of flame due to arson to a fire step by step, an appropriate combination of fire judgment can be used, and the stage of judgment is also two stages. The lighting is not limited to this, and the lighting may be controlled at an appropriate stage of a plurality of stages, and the fire may be determined or transferred at an appropriate stage later.

Further, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not further limited by the numerical values shown in the above embodiments.

10: Alarm 12: Processor 14: Sensor unit 16: Lighting device 18: Acoustic alarm unit 20: Transfer unit 22: Ultraviolet sensor 24: Infrared sensor 24a: First infrared sensor 24b: Second infrared sensor 26: Fire determination unit 28: Flame determination unit 30: Flicker determination unit 32: Lighting control unit 34: Translucent window 36a: λ1 optical wavelength filter 36b: λ2 optical wavelength filter 38: Human sensor 40: Human determination unit 42: Time acquisition unit 44: Time management unit 46: Brightness / dark sensor 48: Brightness / darkness determination unit 50: Wireless communication unit 52: Antenna

The present invention is an alarm device that is installed outdoors or semi-outdoors and monitors a fire in a monitoring area.
A flame detector that detects a flame and outputs a detection signal,
A fire judgment unit that determines a fire by dividing it into multiple stages based on the temporal change of the detection signal of the flame detection unit and determines a fire when the fire judgment result of each stage meets a predetermined condition.
Lighting equipment that illuminates part or all of the surveillance area,
Of the multiple stages of fire judgment judged by the fire judgment unit, the lighting control unit that drives the lighting device based on the result of at least one fire judgment before the fire is determined.
Is characterized by the provision of.

Here, the flame detector
An ultraviolet sensor that detects ultraviolet rays emitted from a flame and outputs a detection signal,
An infrared sensor that detects infrared rays emitted from a flame and outputs a detection signal,
Equipped with
The fire judgment unit performs a first stage fire judgment based on a detection signal from an ultraviolet sensor and a second stage fire judgment based on a detection signal from an infrared sensor, and a second stage fire judgment. Decide the fire based on the fire judgment result of the stage,
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the fire determination unit.

In addition, the flame detector
An ultraviolet sensor that detects ultraviolet rays emitted from a flame and outputs a detection signal,
An infrared sensor that detects infrared rays emitted from a flame and outputs a detection signal,
Equipped with
The fire judgment unit determines the first stage fire determination that the detection signal from the ultraviolet sensor exceeds the predetermined standard, and the second stage fire determination that the detection signal from the infrared sensor exceeds the predetermined standard. Judgment is made, and a fire is determined based on the result of the second stage fire judgment.
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the fire determination unit.

The flame detector
An ultraviolet sensor that detects ultraviolet rays emitted from a flame and outputs a detection signal,
An infrared sensor that detects infrared rays emitted from a flame and outputs a detection signal,
Equipped with
The fire judgment unit determines that the first stage fire judgment that determines that the detection signal from the ultraviolet sensor exceeds a predetermined standard and that a predetermined fluctuation frequency peculiar to the flame can be obtained from the detection signal from the infrared sensor. The fire is judged in the second stage, and the fire is determined based on the result of the fire judgment in the second stage.
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the determination unit.

In addition, the flame detector
Equipped with multiple infrared sensors that detect infrared rays of multiple different band wavelengths emitted from the flame and output the detection signal,
The fire determination unit determines the flame based on the detection signals of the plurality of infrared sensors in the first stage, and the fire determination is performed in the first stage, and the predetermined fluctuation frequency peculiar to the flame is determined from the detection signals from at least the infrared sensors among the plurality of infrared sensors. The second stage fire judgment is performed to determine that the above is obtained, and the fire is determined based on the second stage fire judgment result.
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the fire determination unit.

In addition, the flame detector
A first infrared sensor that detects infrared rays of a predetermined wavelength corresponding to CO ₂ resonance radiation emitted from a flame and outputs a detection signal,
A second infrared sensor that detects infrared rays with wavelengths other than the specified wavelength corresponding to CO ₂ resonance radiation and outputs a detection signal,
Equipped with
The fire judgment unit determines that the detection signal from the first infrared sensor exceeds a predetermined standard and the detection signal from the second infrared sensor is equal to or less than the predetermined standard, and the first stage fire judgment and the first infrared ray. A second-stage fire judgment is performed to determine that a predetermined fluctuation frequency peculiar to the flame can be obtained from the detection signal from the sensor, and a fire is determined based on the second-stage fire judgment result.
The lighting control unit drives the lighting device when the fire determination result of the first stage is obtained by the fire determination unit.

The alarm device of the present invention is further provided with a communication unit for transmitting and receiving signals to and from other alarm devices.
When the lighting control unit starts driving the lighting device, the communication unit transmits a lighting drive start signal to another alarm device , while the communication unit receives a lighting drive start signal from the other alarm device. Drive your own lighting equipment.

The alarm device of the present invention is further provided with a communication unit for transmitting and receiving signals to and from other alarm devices.
When the fire control unit determines a fire by the fire determination unit, the communication unit transmits a lighting drive start signal to another alarm , while the communication unit receives a lighting drive start signal from another alarm. , Drive its own lighting device.

When the lighting control unit receives a lighting drive start signal from another alarm, the lighting control unit drives its own lighting device after a predetermined delay time has elapsed from the signal reception.

Claims (14)

For alarms installed outdoors or semi-outdoors to monitor fires in the surveillance area,
A flame detection unit that detects a flame and outputs a detection signal;
A fire determination unit that determines a fire by dividing into a plurality of stages from the detection signal of the flame detection unit, and determines a fire when a fire determination result of each stage satisfies a predetermined condition;
A lighting device that illuminates part or all of the monitoring area;
Among the multiple stages of fire determination determined by the fire determination unit, an illumination control unit that drives the lighting device based on the result of at least one fire determination before reaching the fire determination;
An alarm device characterized by providing.
The alarm device according to claim 1, wherein
The flame detector is
An ultraviolet sensor that detects the ultraviolet light emitted from the flame and outputs a detection signal;
An infrared sensor that detects infrared rays emitted from the flame and outputs detection signals;
With
The fire determination unit performs a first-stage fire determination for determining a fire based on a detection signal from the ultraviolet sensor and a second-stage fire determination for determining a fire based on a detection signal from the infrared sensor. The fire is determined based on the result of the fire determination in the second stage,
The said lighting control part drives the said illuminating device when the fire determination result of the 1st step is obtained by the said fire determination part, The alarm device characterized by the above-mentioned.
The alarm device according to claim 1, wherein
The flame detector is
An ultraviolet sensor that detects the ultraviolet light emitted from the flame and outputs a detection signal;
An infrared sensor that detects infrared rays emitted from the flame and outputs detection signals;
With
The fire determination unit is configured to determine whether a detection signal from the ultraviolet sensor exceeds a predetermined reference, and to determine whether a detection signal from the infrared sensor exceeds a predetermined reference. Make a fire judgment of the stage, and determine the fire based on the fire judgment result of the second stage,
The said lighting control part drives the said illuminating device when the fire determination result of the 1st step is obtained by the said fire determination part, The alarm device characterized by the above-mentioned.
The alarm device according to claim 1, wherein
The flame detector is
An ultraviolet sensor that detects the ultraviolet light emitted from the flame and outputs a detection signal;
An infrared sensor that detects infrared rays emitted from the flame and outputs detection signals;
With
The fire determination unit determines a first-stage fire determination that determines that a detection signal from the ultraviolet sensor exceeds a predetermined reference, and determines that a predetermined fluctuation frequency specific to flame is obtained from the infrared sensor. Make a fire judgment in the second stage, determine the fire based on the fire judgment result in the second stage,
The said lighting control part drives the said illuminating device when the fire determination result of the 1st step is obtained by the said fire determination part, The alarm device characterized by the above-mentioned.
The alarm device according to claim 1, wherein
The flame detector is
It has multiple infrared sensors that detect infrared rays of different wavelengths from the flame and output detection signals,
The fire determination unit is configured to determine a flame based on a correlation between detection signals of the plurality of infrared sensors, a predetermined fire-specific determination from a detection signal from at least one of the plurality of infrared sensors. The second stage fire judgment is performed to determine that the fluctuation frequency of the second stage is obtained, and the fire is determined based on the result of the second stage fire judgment.
The said lighting control part drives the said illuminating device when the fire determination result of the 1st step is obtained by the said fire determination part, The alarm device characterized by the above-mentioned.
The alarm device according to claim 1, wherein
The flame detector is
A first infrared sensor for detecting infrared light of a predetermined wavelength corresponding to CO ₂ resonance radiation emitted from the flame and outputting a detection signal;
A second infrared sensor for detecting infrared light having a wavelength other than the predetermined wavelength corresponding to the CO ₂ resonance radiation and outputting a detection signal;
With
The fire determination unit is a first-stage fire determination in which the detection signal from the first infrared sensor exceeds a predetermined reference and the detection signal from the second infrared sensor is equal to or lower than a predetermined reference; Performing a second-stage fire determination to determine that a predetermined fluctuation frequency specific to a flame is obtained from a detection signal from the first infrared sensor, and determining a fire based on the second-stage fire determination result;
The said lighting control part drives the said illuminating device when the fire determination result of the 1st step is obtained by the said fire determination part, The alarm device characterized by the above-mentioned.
The alarm device according to claim 1, further comprising:
A human sensor that detects a person present in the monitoring area and outputs a detection signal;
A person determination unit for determining presence or intrusion of a person from a detection signal of the human sensor;
Provided,
The lighting control unit includes at least one fire determination before reaching the fire determination among a plurality of fire determinations determined by the fire determination unit when the person determination unit determines the presence or intrusion of a person. The lighting device is driven based on the result of the above.
The alarm device according to claim 1, further comprising:
A time acquisition unit for acquiring the current time;
A time management unit for setting a predetermined time zone as a control effective time zone of the lighting device;
Provided,
The lighting control unit, as a result of at least one fire determination before reaching the fire determination, among a plurality of fire determinations determined by the fire determination unit in a control effective time zone set by the time management unit. An alarm device characterized in that the lighting device is driven based on the alarm device.
The alarm device according to claim 1, further comprising:
A brightness sensor that detects the brightness of the monitoring area and outputs a detection signal;
A light / dark determination unit for determining a decrease in brightness of the monitoring area from the detection signal of the light / dark sensor;
Provided,
The lighting control unit includes at least one of a plurality of fire determinations determined by the fire determination unit before reaching the fire determination when the brightness decrease of the monitoring area is determined by the light / dark determination unit. An alarm device, wherein the lighting device is driven based on the result of two fire determinations.
The alarm device according to any one of claims 1 to 9,
The said lighting control part stops the drive of the said illuminating device, when the said fire determination part does not conclude a fire after driving the said illuminating device.
The alarm device according to claim 1, wherein
In addition, a communication unit that sends and receives signals to and from other alarm devices is provided.
When the lighting control unit starts driving the lighting device, the communication unit transmits a lighting driving start signal to another alarm device, while the communication unit receives a lighting driving start signal from another alarm device. When this happens, the alarm device is characterized by driving its own lighting device.
The alarm device according to claim 1, wherein
In addition, a communication unit that sends and receives signals to and from other alarm devices is provided.
The lighting control unit transmits a lighting drive start signal to another alarm device by the communication unit when a fire is determined by the fire determination unit, while an illumination drive start signal is transmitted from the other alarm device by the communication unit. An alarm device that, when received, drives its own lighting device.
13. The alarm device according to claim 11 or 12, wherein when the illumination control unit receives an illumination drive start signal from another alarm device, the illumination control unit drives its own illumination device after a predetermined delay time has elapsed since the signal reception. Alarm device characterized by.
  14. The alarm device according to claim 11, wherein when the illumination control unit receives an illumination drive stop signal from another alarm device, the illumination control unit continues to drive the illumination device for a predetermined period of time. An alarm device that stops after being stopped.

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