JPH06259674A - Smoke detector combwedly used as grain detector - Google Patents

Abstract

PURPOSE:To perform fire detection by detecting environmental abnormality with a low cost by using a sensor as it is. CONSTITUTION:A grain detector provided with a light emitting means 5 by which a monitoring area 6 is irradiated with an optical beam, a light receiving means 7 arranged at a position where no optical beam is received directly and which receives scattered light generated due to a grain or smoke generated by fire in the monitoring area 6, the sensor provided with an amplifier means 8 which amplifies the output of the light receiving means 7, a counter means which counts the output of the amplifier means 8 in time unit, a calculation means which calculates the mean value or integral value per time unit of the output of the amplifier means 8, and a discrimination means which discriminates contamination level in the monitoring area 6 based on a count value counted by the counter means 9 and discriminates a fire level based on the mean value or integral value found by the calculation means 9 is incorporated in one cabinet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a particle detection / smoke detection apparatus for detecting particles to smoke.

[0002]

2. Description of the Related Art Conventionally, as a smoke detecting device for detecting smoke generated by a fire, for example, a photoelectric analog smoke detector disclosed in JP-A-63-32690 is known. This photoelectric analog smoke detector is provided with a light emitting chamber and a light receiving chamber in a chamber having a maze structure, and the light receiving chamber is placed at a position where it does not directly receive the light emitted from the light emitting chamber. The structure is such that the scattered light due to is detected in the light receiving chamber and a signal corresponding to the smoke density is obtained.

In this photoelectric analog smoke detector,
A light-emitting element drive circuit for intermittently emitting a light-emitting element such as an LED is provided in the light-emitting chamber, and a light-receiving signal amplification circuit provided with a light-receiving element such as a photodiode is provided in the other light-receiving chamber. When the light scattered by the smoke in the chamber is detected by the light receiving element, it is photoelectrically converted into a level signal according to the smoke concentration in the light receiving signal amplification circuit, then amplified, and the output integrated in the integration circuit is output in the DC amplification circuit. It was amplified and obtained an analog signal with the output characteristics required by the fire alarm system side.

[0004]

However, in such a conventional photoelectric type analog smoke detector, since the integrated amount of scattered light is detected, in a region where the number of smoke particles generated by a fire is small. , The amount of integration was small, so it was not possible to detect the extremely thin smoke generated in the early stages of the fire.

Further, since it is not possible to detect fine particles such as dust, it is not possible to discriminate environmental abnormalities. Therefore, in order to detect fine particles, it may be possible to integrally provide a fine particle detector in the sensor to detect the fine particle and smoke concentration, but in this case, the sensor cannot be used as it is. Therefore, there is a problem that the cost increases.

[0006] The present invention has been made in view of such conventional problems, and it is possible to perform from the environmental abnormality to the fire detection, and to reduce the cost by using the sensor as it is. It is an object of the present invention to provide a smoke detection device that can also detect fine particles.

[0007]

In order to achieve the above object, the present invention provides a light emitting means for irradiating a light beam to a monitoring area and a position for not directly receiving the light beam emitted from the light emitting means. In order to detect the fine particles, a light receiving unit that is disposed and receives scattered light generated when fine particles or smoke generated by a fire enters the monitoring area, an amplifier that amplifies the output of the light receiving unit, and the fine particles are detected. The counting means counts the output of the amplifying means in units of time, the calculating means calculates the average value or the integrated value of the output of the amplifying means per time unit in order to detect the smoke, and the counting means counts. A particle detector having a discriminating means for discriminating the contamination level of the monitoring area based on the count value and discriminating the fire level on the basis of the average value or the integrated value obtained by the calculating means is incorporated in one housing. It is characterized in.

Further, according to the present invention, a light emitting means for irradiating a light beam to the monitoring area and a smoke generated by a fine particle or a fire are arranged at a position where the light beam emitted from the light emitting means is not directly received. A light receiving means for receiving scattered light generated by the intrusion of light, a sensor having an amplifying means for amplifying an output of the light receiving means, and a frequency calculating means for calculating a frequency distribution for each level of the output level of the amplifying means. Storage means for storing in advance the frequency distribution of the output level of smoke particles and the frequency distribution of the output level of other particles, the frequency distribution calculated by the frequency calculating means, and each frequency distribution stored in the storage means And a particle detector having a discrimination means for discriminating between smoke and other fine particles is incorporated in one housing.

Further, the present invention is characterized in that pulsed light continuous light switching means is provided for switching the signal output to the driving means for driving the light emitting means so that the light emitting means emits continuous light or pulsed light. And Further, according to the present invention, a chopper is provided on the front surface of the light emitting means so that the light emitting means emits continuous light or pulsed light, and pulsed light continuous light for switching a signal output to a driving means for driving the chopper. It is characterized in that switching means is provided.

Further, the present invention is characterized in that the discrimination means is provided in the sensor, the receiver, or the repeater instead of being provided in the particle detector. Further, the present invention is characterized in that the discrimination means and the storage means are provided in the sensor, the receiver or the repeater instead of being provided in the particle detector.

Further, according to the present invention, the light emitting means for irradiating the first monitoring area with the light beam, and the light beam emitted from the light emitting means are arranged so as not to directly receive the light beam, and the first monitoring area is provided. Light receiving means for receiving scattered light generated by intrusion of fine particles and smoke generated by fire, a sensor having an amplifying means for amplifying the output of the light receiving means, and a second monitoring different from the first monitoring area Light emitting means for irradiating a light beam to the area, and scattering caused by fine particles or smoke generated by a fire entering the second monitoring area which is arranged at a position where the light beam emitted from the light emitting means is not directly received. The light receiving means for receiving the light, the amplifying means for amplifying the output of the light receiving means, and the particle detector having the counting means for counting the output of the amplifying means in time unit to detect the particles are one. Built-in body, counting means for counting the average value or integrated value per unit of time of the output of the amplifying means for detecting the smoke, and contamination of the monitoring area based on the counted value counted by the counting means Determine the level,
It is characterized in that it has a discriminating means for discriminating the fire judging level based on the average value or the integrated value obtained by the calculating means.

[0012]

According to the smoke detecting apparatus for both particle detection and the present invention having such a structure, since the sensor and the particle detector are incorporated in one housing, the conventional sensor can be used as it is. Therefore, the cost can be reduced.
Further, since it is possible to detect the fine particles, it is possible to detect extremely thin smoke that occurs in the early stage of a fire, and it is possible to issue a caution alarm. Further, since the level of air pollution can be detected, it is possible to determine the environmental abnormality.

Further, since it is possible to discriminate whether the detected fine particles are smoke particles or fine particles such as dust, a preliminary alarm can be output when smoke is discriminated, and when dust or the like is discriminated. An alarm can be output.
Further, since the integrated value or the average value of the smoke density is obtained, the fire can be detected reliably.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 25 are views showing an embodiment of the present invention. FIG. 1 is an overall view of a particulate matter detection / smoke detection apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 16 is a housing that constitutes a particle detection / smoke detection device, and a sensor 17 and a particle detector 18 are built in the housing 16.

Reference numeral 19 is a fan, and the fan 19 is the housing 1.
Replace the smoke and air inside 6. Next, FIG. 2 shows an internal configuration of the sensor 17. In FIG. 2, reference numeral 1 is an oscillating unit, and the oscillating unit 1 outputs pulses intermittently at a constant cycle.
Reference numeral 51 is a direct current section that outputs a continuous constant voltage. Reference numeral 2 denotes a pulsed light continuous light switching unit as a pulsed light continuous light switching unit, and the pulsed light continuous light switching unit 2 switches the output of the oscillating unit 1 or the DC unit 51 according to the pulsed light continuous light selection signal from the CPU 3. By doing so, pulse or continuous constant voltage switching is performed.

Reference numeral 4 denotes a drive section as drive means, and the drive section 4 drives the light emitting section 5 as light emitting means continuously or intermittently based on the switching output of the pulsed light continuous light switching section 2. The light emitting unit 5 irradiates the monitoring region 6 with a light beam intermittently or continuously. The light emitting section 5 is composed of, for example, a halogen lamp, a laser diode, an LED, or the like, and is configured to secure a light emission intensity of a predetermined value or more. This makes it possible to detect fine particles.

Reference numeral 7 denotes a light receiving portion as a light receiving means. The light receiving portion 7 is composed of, for example, a photodiode, and is arranged at a position where the light beam emitted from the light emitting portion 5 is not directly received. When smoke generated by a fire flows into the monitoring area 6 or when fine particles such as dust exist in the monitoring area 6, scattered particles are generated by the smoke particles or the fine particles, and these scattered light enters the light receiving unit 7. .

Reference numeral 8 is an amplification section as an amplification means composed of an operational amplifier and the like, and the amplification section 8 amplifies the light reception output of the light reception section 7. 9 is an integrating unit as a calculating means,
The integrator 9 calculates the integrated value of the amplified output of the amplifier 8. 10
Is a sample hold unit, and the sample hold unit 10
Synchronizes with the oscillation output from the oscillating unit 1, holds the peak value of the integrated value integrated by the integrating unit 9, and outputs the held value to the CPU 3 as a discriminating means. Although the sample hold unit 10 is used here, the present invention is not limited to this.
A converter may be used to convert the integrated value integrated by the integrating unit 9 into a digital value and output the digital value to the CPU 3.

Further, although the integrating section 9 is used to integrate the amplified output of the amplifying section 8, the present invention is not limited to this. As shown in FIG. 3, the averaging section 11 and the timer section 12 are used for a predetermined time. , For example, the average value of the amplified output is obtained every 10 seconds, and C
You may make it output to PU3. Next, FIG. 4 shows an internal configuration of the particle detector 18. The detection output is input from the sensor 17.

In FIG. 4, 13 is a waveform shaping section,
The waveform shaping unit 13 performs waveform shaping of the amplified output of the amplification unit 8 of the sensor 17. 14 is a counting unit as counting means,
The counting unit 14 counts the output of the waveform shaping unit 13 every fixed time output by the timer unit 15, for example, every 10 seconds, and outputs the count value to the CPU 3.

The CPU 3 outputs a pulsed light continuous light selection signal to the pulsed light continuous light switching unit 2 and determines the fire level due to smoke based on the hold value from the sample hold unit 10 or the average value from the averaging unit 11. And then
In addition, it has a function as a determination unit that determines the contamination level of air based on the count value from the counting unit 14. Next, setting of the air pollution level and the fire level will be described.

FIG. 5 shows the output of the amplifier 8. In detecting fine particles, a count level B, which is a predetermined threshold value, is set for the ground level A, and the count level B is set.
If it exceeds, count is performed. That is, the timer unit 15 sets a fixed time, for example, 10 seconds, and the counting unit 14 counts whether the usage count level B is exceeded in 10 seconds. The count level B can be set as appropriate,
For example, the ground level A = count level B may of course be used.

The count value per fixed time is shown in FIG. Further, a graph showing the appearance frequency of the count value of FIG. 6 is shown in FIG. Graph C in FIG. 7 shows the frequency of the count value in the normal state. For example, when the count value exceeds the preset level 1 for the number of times, it is determined to be an environmental abnormality level, and when it exceeds the number 2 for the number of times set to be greater than level 1, it is determined to be the caution alarm level.

Next, FIG. 8 shows the relationship between time and smoke density when a fire occurs. As shown in FIG. 8, the smoke concentration increases in proportion to the time, but in the early stage of the fire, the smoke concentration is thin and the number of smoke particles is small. Therefore, as shown in FIG. The integrated value integrated in 9 is small. for that reason,
It cannot be detected by ordinary smoke detectors.

On the other hand, as shown in FIG. 9 (A), the count value by the counting unit 14 of the particle detector 18 can count the increase of particles from the beginning of the fire, while the smoke density is When the light becomes darker, the light receiving output of the light receiving unit 7 rises, and as shown in FIG. 10, the saturation is reached and counting becomes impossible. In this way, when the smoke density becomes high, the integrated value obtained by the integrator 9 rapidly increases, as shown in FIG. When the integrated value exceeds level 1 in FIG. 11, for example, it is determined that the pre-alarm level is reached, and level 2
When it exceeds the above, it is judged to be a fire level.

Next, the operation will be described. First, the case where the light emission of the light emitting unit 5 is continuous light will be described. In FIG. 2, when a pulsed light continuous light selection signal for instructing selection of continuous light is output from the CPU 3 to the pulsed light continuous light switching unit 2,
The pulsed light continuous light switching unit 2 switches to the continuous constant voltage of the DC unit 51 and outputs it to the driving unit 4.

The drive unit 4 drives the light emitting unit 5 with a continuous constant voltage, and the light emitting unit 5 irradiates the monitoring area 6 with a light beam. The light emission output of the light emitting unit 5 is shown in FIG. As shown in FIG. 12, the light emission output of the light emitting unit 5 is constant with respect to time.

The presence of fine particles in the monitoring area 6 and the infiltration of smoke particles generated by a fire generate scattered light, which is received by the light receiving section 7. The light receiving output of the light receiving unit 7 is amplified by the amplification unit 8. FIG. 13 shows the received light output amplified by the amplifier 8. FIG. 13 shows a particle detector 18
3 shows a detection state of fine particles in FIG.

When detecting fine particles, count level B
Is set, and the received light output exceeding the count level B is counted during a fixed time Δt. FIG. 14 shows the count value for each fixed time Δt. The count value counted by the counting unit 14 is output to the CPU 3, and the CPU 3 determines the air pollution level based on the count value. For example, when the count value exceeds level 1, it is determined that it is at the level of environmental abnormality, and when it exceeds level 2, it is determined that it is at the caution alarm level.

Next, FIG. 15 shows the received light output of the amplification section 8 of the sensor 17 when the smoke density due to fire increases. After the beginning of the fire, the smoke density increases and the received light output rapidly increases. In this state, saturation is reached and it becomes impossible to count. FIG. 16 shows a state in which the light receiving output of the amplifying unit 8 is incremented by the integrating unit 9.

FIG. 17 shows hold values obtained by sample-holding the peaks of the integrated values integrated by the integrating section 9 by the sample-holding section 10. Further, FIG. 18 shows an average value obtained by averaging the received light output of the amplifying unit 8 by the averaging unit 11 at constant time intervals Δt. The CPU 3 determines the fire level based on the hold value or average value of the integrated values. For example, when the hold value or average value exceeds level 1, it is determined that it is a pre-alarm level, and when it exceeds level 2, it is determined that it is a fire level.

Next, the case where the light emitting section 5 emits light intermittently will be described. In FIG. 2, when the CPU 3 outputs a pulsed light continuous light selection signal instructing selection of pulsed light to the pulsed light continuous light switching unit 2, the pulsed light continuous light switching unit 2 outputs the pulse output from the oscillation unit 1 to the drive unit 4. Switching to output to. The drive unit 4 drives the light emitting unit 5 intermittently, and the light emitting unit 5 irradiates the monitoring region 6 with pulsed light corresponding to the oscillation frequency fo, as shown in FIG.

When fine particles such as dust exist in the monitoring area 6 and when smoke particles generated by a fire enter, scattered light is generated, and the scattered light is received by the light receiving section 7. Light receiving part 7
The received light output of is amplified by the amplifier 8. When fine particles such as dust exist in the monitoring area 6, a light receiving output corresponding to the fine particles is obtained.

The received light output of the amplifier 8 in this case is shown in FIG. FIG. 20 shows a detection state of fine particles output at regular intervals. Since the fine particles are small, the light receiving output also becomes small. Therefore, the count level B is provided every fixed period (t1 to tn), and the received light output is counted only when the count level B is exceeded. That is, the amplifier 8
When the light receiving output of 1 is waveform-shaped by the waveform shaping unit 13, the counting unit 14 counts at every constant period (t1 to tn).

FIG. 21 shows the count value for each fixed period (t1 to tn). Next, when smoke particles due to a fire flow into the monitoring area 6, a received light output having a size corresponding to the smoke density is obtained. The received light output of the amplifier 8 in this case is shown in FIG.
Shown in. The light reception output of the amplification unit 8 is integrated by the integration unit 9.

The received light output of the integrator 9 is shown in FIG. The peak value of the output of the integrating unit 9 is sampled and held by the sample and hold unit 10. Sample hold unit 1
The hold value of 0 is shown in FIG. Further, FIG. 25 shows an average value obtained by averaging the received light output of the amplification section 8 by the averaging section 11 at regular intervals.

The hold value of the integrated value from the sample and hold unit 10, the average value from the averaging unit 11, and the count value from the counting unit 14 are input to the CPU 3. CPU
3 determines the air contamination level based on the count value. For example, when the count value exceeds level 1, it is determined that it is an environmental abnormality level, and when it exceeds level 2,
It is determined to be the caution warning level. Further, the CPU 3 determines the fire level based on the hold value or the average value. For example, when the hold value or the average value exceeds level 1, it is determined that it is the pre-alarm level, and when it exceeds level 2, it is determined that it is the fire level.

As described above, in this embodiment, since the sensor 17 and the particle detector 18 are built in one housing 16, the conventional sensor 17 can be used as it is, and the cost is reduced. It can be reduced. Further, since the fine particles are detected, it is possible to detect extremely thin smoke that occurs in the early stage of a fire, and it is possible to issue a caution alarm. Further, since the air pollution level can be detected, it is possible to determine the environmental abnormality. Further, since the integrated value or the average value of the smoke density is obtained, it is possible to reliably detect the fire.

Next, FIGS. 26 and 27 are views showing another embodiment of the present invention. Also in this embodiment, as shown in FIG. 26, the sensor 17 and the particle detector 20 are built in one housing 16. The internal structure of the sensor 17 is the same as that of FIG. 2 of the above embodiment. The internal configuration of the particle detector 20 is as shown in FIG. 27, which is different from FIG. 4 of the above embodiment.

In FIG. 27, 21 is a waveform shaping section, and the waveform shaping section 21 shapes the output of the amplification section 8 of the sensor 17. Reference numeral 22 denotes a frequency calculation unit as a frequency calculation unit, which counts the output levels waveform-shaped by the waveform shaping unit 22 for each predetermined time and obtains the frequency distribution of the output levels.

Reference numeral 23 is a timer section, and the timer section 23
To the frequency calculator 22 for calculating the frequency distribution,
Give a certain time. Reference numeral 24 denotes a memory unit as a storage unit, and the memory unit 24 stores in advance the frequency distribution of the output level of smoke particles and the frequency distribution of other particles such as dust. Reference numeral 25 is a CPU as a determination means,
25 compares the frequency distribution calculated by the frequency calculation unit 22 with each frequency distribution of smoke, dust, etc. stored in the memory unit 24 to determine whether the detected fine particles are smoke particles or other fine particles, and The fire level is determined based on the hold value from the sample hold unit 10 of the sensor 17.

In the present embodiment, the frequency distribution of the output level of smoke particles and the frequency distribution of the output level of other particles such as dust are stored in advance and are stored as the frequency distribution calculated by the frequency calculation unit 22. Since the frequency distributions are compared, it is possible to determine whether the detected fine particles are smoke or dust. That is, in the case of dust, the particle size is larger than that of smoke, and the frequency distribution of output levels by level is a substantially normal distribution.On the other hand, in the case of smoke, the particle size is small in the initial state, so the output level The frequency distribution for each level is a frequency distribution peculiar to downward-smoke smoke. Therefore, by comparing the frequency distributions calculated by the frequency calculation unit 22 with each other such as smoke stored in advance, In the initial stage, it is possible to determine whether the detected particles are smoke or dust.

When it is determined that it is smoke, a preliminary alarm can be output, and when it is determined that it is dust or the like, a dirt alarm can be output. In the initial stage,
When it is determined that the detected particles are smoke, the fire determination level may be lowered when the smoke concentration subsequently increases. As described above, also in this embodiment, one housing 1
Since the sensor 17 and the particle detector 20 are incorporated in the sensor 6, the conventional sensor 17 can be used as it is, and the cost can be reduced.

As another embodiment, a particle detector having a sensing portion such as a light emitting portion and a light receiving portion may be used as the above-mentioned sensor 17
It is also possible to make the fire judgment disclosed in the above embodiment based on the information obtained from the sensing units, each of which has its own sensing unit. In addition,
The CPU 3 of the above embodiment is provided in the particle detector 18, and the CPU 25 and the memory unit 24 of this embodiment are provided in the particle detector 20, but the present invention is not limited to this, and the CPU 3 or the CPU 25 and the memory unit 24 are not limited to this. May be provided in the sensor 17, the receiver, or the repeater.

[0045]

As described above, according to the present invention, since the sensor and the particle detector are built in one housing, the conventional sensor can be used as it is and the cost can be reduced. It can be reduced. Moreover, since the fine particles are detected, it is possible to detect the thin smoke that occurs in the early stage of the fire and issue a caution alarm.
Also, because it can detect the level of air pollution,
Environmental abnormalities can be identified.

Further, in the initial stage, it is possible to discriminate between smoke and other fine particles. In addition, smoke density is detected and integrated or averaged, so that a fire can be alerted.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration example of a sensor.

FIG. 3 is a diagram showing an averaging unit.

FIG. 4 is a diagram showing a configuration example of a particle detector.

FIG. 5 is a graph showing an example of received light output.

FIG. 6 is a graph showing count values per hour

FIG. 7 is a graph showing the frequency of counts.

FIG. 8 is a graph showing the relationship between time and smoke density.

FIG. 9 is a graph showing an initial count value and an integrated value.

FIG. 10 is a graph showing the relationship between time and the number of counts.

FIG. 11 is a graph showing the relationship between time and integrated value.

FIG. 12 is a graph showing the emission output of continuous light.

FIG. 13 is a graph showing the received light output of fine particles.

FIG. 14 is a graph showing a count value per fixed time period.

FIG. 15 is a graph showing the received light output of smoke.

FIG. 16 is a graph showing an integrated value

FIG. 17 is a graph showing hold values

FIG. 18 is a graph showing average values

FIG. 19 is a graph showing a light emission output of pulsed light according to another embodiment of the present invention.

FIG. 20 is a graph showing the received light output of fine particles.

FIG. 21 is a graph showing a count value per fixed time period.

FIG. 22 is a graph showing the received light output of smoke.

FIG. 23 is a graph showing an integrated value.

FIG. 24 is a graph showing hold values

FIG. 25 is a graph showing average values

FIG. 26 is an overall view according to another embodiment of the present invention.

FIG. 27 is a diagram showing a configuration example of a particle detector.

[Explanation of symbols]

 1: Oscillation unit 2: Pulsed light continuous light switching unit (pulsed light continuous light switching unit) 3: CPU (determination unit) 4: Driving unit (driving unit) 5: Light emitting unit (light emitting unit) 6: Monitoring area 7: Light reception Section (light receiving means) 8: amplification section (amplification section) 9: integration section (calculation section) 10: sample hold section 11: averaging section (calculation section) 12: timer section 13: waveform shaping section 14: counting section (counting section) ) 15: timer unit 16: housing 17: sensor 18: particle detector 19: fan 20: particle detector 21: waveform shaping unit 22: frequency calculation unit (frequency calculation unit) 23: timer unit 24: memory unit ( Storage means) 25: CPU (discrimination means)

Claims (7)

[Claims] 1. A light emitting means for irradiating a light beam to a surveillance area and a light emitting means arranged at a position where the light beam emitted from the light emitting means is not directly received, and fine particles or smoke generated by a fire enter the surveillance area. A light receiving means for receiving the scattered light generated in 1., a sensor having an amplifying means for amplifying the output of the light receiving means, a counting means for counting the output of the amplifying means in time unit to detect the fine particles, In order to detect smoke, the amplifying means calculates the average value or integrated value of the output per time unit, and the dirt level of the monitoring area is determined and calculated based on the count value counted by the counting means. A particle detecting / smoke detecting device, characterized in that a particle detector having a discriminating means for discriminating a fire level based on an average value or an integrated value obtained by the means is built in one casing. 2. A light emitting means for irradiating a light beam to the monitoring area, and a fine particle or smoke generated by a fire which is arranged at a position where the light beam emitted from the light emitting means is not directly received. The light receiving means for receiving the scattered light generated by the sensor, the sensor having the amplifying means for amplifying the output of the light receiving means, the frequency calculating means for calculating the frequency distribution for each level of the output level of the amplifying means, and the smoke particle A storage unit that stores the frequency distribution of the output level and the frequency distribution of the output level of the other particles in advance, compares the frequency distribution calculated by the frequency calculation unit and each frequency distribution stored in the storage unit, A particle detecting / smoke detecting apparatus, characterized in that a particle detector having a judging means for judging whether it is smoke or other particles is built in one housing. 3. A pulsed light continuous light switching means for switching a signal output to a driving means for driving the light emitting means so that the light emitting means emits continuous light or pulsed light. Smoke detection device for particle detection of 1 or 2. 4. A pulsed light continuous light switch for providing a chopper on the front surface of the light emitting means so that the light emitting means emits continuous light or pulsed light, and for switching a signal output to a driving means for driving the chopper. The smoke detecting apparatus for particle detection and combined use according to claim 1, further comprising means. 5. The smoke detecting apparatus also for detecting particulate matter according to claim 1, wherein the discriminating means is provided in the sensor, the receiver or the repeater instead of being provided in the particle detector. 6. The smoke for particle detection and use according to claim 2, wherein the discrimination means and the storage means are provided in the sensor, the receiver or the repeater instead of being provided in the particle detector. Detection device. 7. A light emitting means for irradiating the first monitoring area with a light beam, and a light emitting means for irradiating the light beam emitted from the light emitting means, which is arranged at a position where the light beam is not directly received by the first monitoring area due to particles or fire. For a second monitoring area different from the first monitoring area, a light receiving means for receiving scattered light generated by intrusion of generated smoke, a sensor having an amplifying means for amplifying an output of the light receiving means, and a second monitoring area different from the first monitoring area. The light emitting means for irradiating the light beam and the second light emitting means are arranged at a position where the light beam emitted from the light emitting means is not directly received.
A light receiving means for receiving scattered light generated by the intrusion of fine particles or smoke generated by a fire into the monitoring area, an amplifying means for amplifying the output of the light receiving means, and an output of the amplifying means for detecting the fine particles. A particle detector having a counting unit that counts by time unit is built in one housing, and a counting unit that counts an average value or an integrated value per unit time of the output of the amplifying unit to detect the smoke. A determination unit that determines the contamination level of the monitoring area based on the count value counted by the counting unit, and determines the fire determination level based on the average value or integrated value obtained by the calculation unit. Smoke detector for particle detection.