JP2001116692A - Smoke sensor and particulate size measuring device and particulate kind discriminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a smoke sensor capable of making the constitution simpler than a conventional technique by avoiding complicatedness such as an adjustment of a part and capable of using the light having optional desired plural wave lengths as plural wave lengths without replacing the part. SOLUTION: This smoke sensor is provided with a light source 1 for emitting the light having plural wave lengths, a deflecting means 4 for deflecting the light having plural wave lengths emitted from the light source 1 at an angle different with every length, a light receiving means 5 being arranged so that the light having plural wave lengths deflected by the deflecting means 4 is made incident on positions different with every wave length and receiving the light incident on the positions different with every wave length with respective positions and a detecting means 6 for detecting whether or nor particulates entering or existing in an optical path of the light emitted from the light source 1 are smoke particles on the basis of extinction output from the respective positions corresponding to plural wave lengths of the light receiving means 5 by the particulates entering or existing in the optical path of the light emitted from the light source 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a smoke detector, a particle size measuring device, and a particle type discriminating device.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Laid-Open No. Hei 4-24797 discloses a light projecting means for projecting light beams of a plurality of wavelengths, and a light receiving means arranged on an optical axis opposite to the light projecting means. Prepared,
A multi-wavelength extinction smoke detector is shown in which the light receiving means detects a change in the amount of light received due to scattering and absorption of smoke particles entering the optical path of the light beam.

FIG. 8 is a diagram showing an example of a multi-wavelength dimming type smoke detector shown in the above prior art. Referring to FIG. 8, in this multi-wavelength extinction smoke detector, a light beam from a lamp 101 as a light projecting means is condensed through a lens 107, a pinhole 108, and a lens 109.
, The light beam is condensed by the condenser lens 104, the light is coupled to the optical waveguide 120, the coupled light is divided into three by the optical waveguide 120, and each divided light is Optical filters 115a, 1 for selectively separating different wavelengths
15b and 115c, the light is separated into three wavelengths, and the light of these separated wavelengths is received by the light receiving elements 116a, 116b and 116c.
The light is respectively received at c and converted into an electric signal. Then, based on the ratio between the wavelengths of the extinction coefficients for the respective wavelengths obtained based on the light receiving outputs of the light receiving elements 116a, 116b, and 116c or the ratio between the wavelengths of the extinction degrees for the respective wavelengths, the non-fire smoke and the fire smoke Is determined.

[0004]

However, in the above-described conventional multi-wavelength extinction smoke detector, separate optical filters 115a, 115b and 11 are provided for each of the three wavelengths.
5c and light receiving elements 116a, 116b, 116c must be provided, and each optical filter 115a, 115b,
There is a problem that adjustment of the installation of the light receiving elements 115a, 116a, 116b, and 116c becomes complicated. The three wavelengths used are the optical filters 115a,
There is a problem that the filter has to be converted every time when a plurality of wavelengths to be used are changed because the filter is determined in advance by 115b and 115c.

According to the present invention, it is possible to avoid the complexity of adjusting the components and the like and to simplify the configuration as compared with the above-described prior art. It is an object of the present invention to provide a smoke detector, a particle size measuring device, and a particle type discriminating device which can be used without replacing parts.

[0006]

In order to achieve the above object, the present invention is directed to a light source for emitting light of a plurality of wavelengths, and a light source for emitting a plurality of wavelengths of light having different angles for each wavelength. Deflecting means for deflecting light at a plurality of wavelengths, and light receiving means arranged to receive light of a plurality of wavelengths deflected by the deflecting means at different positions for each wavelength, and to receive light incident at different positions for each wavelength at each position And the light emitted from the light source intrudes into the optical path of the light emitted from the light source based on the dimming output from the respective positions corresponding to the plurality of wavelengths of the light receiving means due to the fine particles that have entered or are present in the light emitted from the light source. Detection means for detecting whether or not the present or existing fine particles are smoke particles.

According to a second aspect of the present invention, there is provided a light source for emitting light of a plurality of wavelengths, a deflecting means for deflecting the light of a plurality of wavelengths emitted from the light source at different angles for each wavelength, and a deflecting means. A plurality of wavelengths of light that are arranged to be incident on different positions for each wavelength, light receiving means for receiving light incident on different positions for each wavelength for each position,
Invaded in the optical path of the light emitted from the light source, or invaded in the optical path of the light emitted from the light source based on the dimming output from the respective positions corresponding to the plurality of wavelengths of the light receiving means due to the existing smoke particles. Or detecting means for detecting the type of existing smoke particles.

According to a third aspect of the present invention, in the smoke detector according to the first or second aspect, the deflection means includes:
It is characterized in that a prism is used.

According to a fourth aspect of the present invention, in the smoke detector according to the first or second aspect, the light receiving means includes:
It is characterized in that an array of charge coupled devices is used.

According to a fifth aspect of the present invention, in the smoke detector according to the first aspect, the detecting means includes a plurality of wavelengths of the light receiving means due to fine particles that have entered or existed in the optical path of the light emitted from the light source. By taking the ratio of the dimming output from each position corresponding to the above, the particle diameter of the fine particles is detected, and whether the fine particles are smoke particles is detected based on the particle diameter of the fine particles. .

According to a sixth aspect of the present invention, there is provided the smoke detector according to the second aspect, wherein the detecting means includes a plurality of light receiving means formed by smoke particles which have entered or existed in the optical path of the light emitted from the light source. It is characterized in that the ratio of the dimming output from each position corresponding to the wavelength is determined to detect the particle size of the smoke particles, and the type of the smoke particles is detected by the particle size of the fine particles.

According to a seventh aspect of the present invention, in the smoke detector according to the second or sixth aspect, an alarm generating means for generating an alarm in accordance with the type of the smoke particles detected by the detecting means is further provided. It is characterized by having.

The invention according to claim 8 is a light source for emitting light of a plurality of wavelengths, a deflecting means for deflecting the light of a plurality of wavelengths emitted from the light source at different angles for each wavelength, and a deflecting means for deflecting the light. A plurality of wavelengths of light that are arranged to be incident on different positions for each wavelength, light receiving means for receiving light incident on different positions for each wavelength for each position,
Invaded in the optical path of the light emitted from the light source, or based on the dimming output from each position corresponding to a plurality of wavelengths of the light receiving means due to the existing fine particles, entered the optical path of the light emitted from the light source, Alternatively, there is provided a detecting means for detecting the particle size of the existing fine particles.

According to a ninth aspect of the present invention, there is provided a light source for emitting light of a plurality of wavelengths, a deflecting unit for deflecting the light of a plurality of wavelengths emitted from the light source at different angles for each wavelength, and a deflecting unit. A plurality of wavelengths of light that are arranged to be incident on different positions for each wavelength, light receiving means for receiving light incident on different positions for each wavelength for each position,
Invaded in the optical path of the light emitted from the light source, or based on the dimming output from each position corresponding to a plurality of wavelengths of the light receiving means due to the existing fine particles, entered the optical path of the light emitted from the light source, Alternatively, there is provided a determining means for determining the type of the existing fine particles.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a smoke detector according to the present invention. The smoke detector of FIG. 1 includes a light source 1 that emits light of a plurality of wavelengths, slits 2 and 3 that narrow the light (light beam) from the light source 1, and a light of a plurality of wavelengths emitted from the light source 1 for each wavelength. A deflecting unit 4 for deflecting the light at different angles, and a plurality of wavelengths of light deflected by the deflecting unit 4 are arranged so as to be incident on different positions for each wavelength. Light receiving means 5 for receiving light and fine particles (in the example of FIG. 1, slits 2 and 3 in the example of FIG. 1) that have entered or exist in the optical path of the light emitted from light source 1.
The light emitted from the light source 1 has entered the optical path based on the dimming output from the respective positions corresponding to the plurality of wavelengths of the light receiving means 5 due to the fine particles that have entered or existed in the detection space 20 between them. Or, it has a detecting means 6 for detecting whether or not the existing fine particles are smoke particles.

More specifically, the detecting means 6 shown in FIG. 1 is provided at each position corresponding to a plurality of wavelengths of the light receiving means 5 due to scattering and absorption by fine particles which enter or enter the optical path of the light emitted from the light source 1. By detecting a change in the amount of received light, more specifically, dimming from each position corresponding to a plurality of wavelengths of the light receiving means 5 due to fine particles that have entered the optical path of light emitted from the light source 1 or are present. By calculating the output ratio, the particle size of the fine particles that have entered or existed in the optical path of the light emitted from the light source 1 is detected, and whether or not the fine particles are smoke particles is detected based on the particle size of the fine particles. Has become.

FIG. 2 is a diagram showing another configuration example of the smoke detector according to the present invention. In FIG. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals. The smoke detector of FIG. 2 includes a light source 1 for emitting light of a plurality of wavelengths, slits 2 and 3 for narrowing light (light beam) from the light source 1, and a light of a plurality of wavelengths emitted from the light source 1 for each wavelength. A deflecting unit 4 for deflecting the light at different angles, and a plurality of wavelengths of light deflected by the deflecting unit 4 are arranged so as to be incident on different positions for each wavelength. The light receiving means 5 for receiving light and the smoke particles that have entered or existed in the optical path of the light emitted from the light source 1 (in the example of FIG. 2, have entered or existed in the detection space 20 between the slits 2 and 3). Based on the dimming output of the light receiving means 5 from the respective positions corresponding to the plurality of wavelengths due to the smoke particles), the type of smoke particles that have entered or existed in the optical path of the light emitted from the light source 1 (for example, fire smoke Or non-fire smoke) And a detection means 7.

More specifically, the detecting means 7 shown in FIG. 2 is provided at each position corresponding to a plurality of wavelengths of the light receiving means 5 due to scattering and absorption by smoke particles which have entered or existed in the optical path of the light emitted from the light source 1. More specifically, by detecting the change in the amount of received light in the light receiving unit 5 from the respective positions corresponding to a plurality of wavelengths of the light receiving unit 5 due to the smoke particles that have entered or are present in the optical path of the light emitted from the light source 1. By determining the ratio of the dimming output, the particle size of the smoke particles is detected, and the type of the smoke particles is detected based on the particle size of the fine particles.

In FIG. 1 and FIG. 2, a light source including two or more wavelengths is used as the light source 1. Specifically, the light source 1
For example, a xenon lamp or a white LED can be used. Further, for the deflecting means 4, for example, a prism can be used. The light receiving means 5 may be, for example, an array of charge-coupled devices (CCD array). Specifically, a one-dimensional or more CCD array can be used as the CCD array.

The difference between the smoke detector of FIG. 1 and the smoke detector of FIG. 2 is that, in the smoke detector of FIG. 1, the detection means 6 has entered or existed in the optical path of the light emitted from the light source 1. On the basis of the dimming output from each position corresponding to the plurality of wavelengths of the light receiving means 5 due to the generated fine particles, whether or not the fine particles are smoke particles is detected. The detecting means 7 detects the type of the smoke particles based on the dimming output from each position corresponding to a plurality of wavelengths of the light receiving means 5 due to the smoke particles entering or existing in the optical path of the light emitted from the light source 1. The point of detection is that the function of the detecting means 6 in FIG. 1 and the function of the detecting means 7 in FIG. 2 can be combined. That is, for example, in the smoke detector of FIG. 1, the detecting means 6 outputs the dimmed output from each position corresponding to a plurality of wavelengths of the light receiving means 5 due to the fine particles that have entered or existed in the optical path of the light emitted from the light source. , It may be configured to detect whether or not the fine particles are smoke particles, and further determine the type of the smoke particles when detecting that the fine particles are smoke particles.

In the smoke detector of FIG. 2 or the smoke detector in which the smoke detector of FIG. 1 and the smoke detector of FIG. 2 are combined, the type of smoke particles (for example, fire smoke or non-fire Alarm detection means (not shown) for generating an alarm according to the type of the detected smoke particles (for example, when the smoke particles are fire smoke) is further provided when the detection of smoke is detected. May be.

Next, the operation of the smoke detector shown in FIG. 1 or 2 will be described. Light from the light source 1 including two or more wavelengths is narrowed down by the slit 2 and passes through a detection space 20 for detecting fine particles or smoke particles. The light that has passed through the detection space 20 is further converged by the slit 3, deflected by a deflecting unit (for example, a prism) 4 at a different angle for each wavelength (separated), and received by a light receiving unit (for example, 1).
(A CCD array of dimensions or more) 5.

At this time, when the deflecting means 4 is constituted by a prism, light having a shorter wavelength is refracted greatly by the prism 4, so that different positions of the light receiving means (CCD array) 5 are different. Light of a wavelength is incident.
That is, the deflecting means (prism) 4 and the light receiving means (C) are arranged so that light of different predetermined wavelengths enters each position (each array number position) of the light receiving means (CCD array) 5.
The positional relationship with the CD array 5 is predetermined.

In the examples shown in FIGS. 1 and 2, two types of light, red light (infrared light or near infrared light) and blue light, are used as the light of a plurality of wavelengths from the light source 1. The case is shown (in the figure, R indicates red light and B indicates blue light).
In this case, since the wavelength of the blue light B is shorter than that of the red light R, the blue light B is largely refracted by the prism 4, so that after passing through the prism 4, the red light R is transmitted to the light receiving means (CCD array) 5. The blue light B incident on the position N _k (the N _k- th array position) is transmitted to the position N of the light receiving means (CCD array) 5.
_n (N _nth array position). by this,
At the _Nk- th array position, electric charge corresponding to the light amount of the red light R is accumulated, and at the _Nn- th array position, electric charge according to the light amount of the blue light B is accumulated. The detection means 6 in FIG. 1 or the detection means 7 in FIG. 2 obtains the ratio between the charge stored in the N _k- th array position of the CCD array 5 and the charge stored in the N _n- th array position.
The ratio between the light amount of the red light R and the light amount of the blue light B can be obtained.

Here, the light amount of the red light R and the light amount of the blue light B are determined when the fine particles or smoke particles enter or exist in the detection space 20. (Particle diameter), respectively, at a predetermined rate (dimming). Thereby, the detecting means 6 or 7 of the smoke detector shown in FIGS.
_By calculating the ratio of the dimming output from the _k- th array position to the dimming output from the N _n- th array position (that is, the ratio between the light amount of the red light R and the light amount of the blue light B), The particle size of fine particles or smoke particles that have entered or existed in the detection space 20 is detected, and based on this particle size, it is determined whether the fine particles are smoke particles (for example, whether they are smoke particles or particles such as water vapor). ,
Alternatively, the type of smoke particles (eg, fire smoke or non-fire smoke) can be detected.

Thus, in the smoke detector of FIGS. 1 and 2,
In the same smoke detection time and the same smoke detection space, a dimming output ratio of a plurality of wavelengths (two wavelengths in the example of FIGS. 1 and 2) can be obtained, so that the particle diameter of fine particles or smoke particles can be accurately measured. In addition, the accuracy of detecting whether or not the fine particles are smoke particles, or the accuracy of detecting the type of smoke particles can be dramatically improved.

By the way, the smoke detector of FIG. 1 or FIG.
Since the deflecting means (for example, a prism) 4 and the light receiving means (for example, a CCD array) 5 are used to obtain the dimming output of the light of each wavelength, the conventional multi-wavelength dimming type smoke detector shown in FIG. As compared with a container, it is possible to avoid the complexity of adjusting components and the like, simplify the configuration, and, as a plurality of wavelengths, without exchanging parts of any desired multiple wavelengths of light. Can be used.

That is, in the conventional multi-wavelength extinction smoke detector, it was necessary to prepare separate optical filters for each wavelength, but in the present invention, light of a plurality of wavelengths is deflected at different angles for each wavelength. One deflecting means (eg, 1
Only two prisms) 4 need to be prepared. Further, in the conventional multi-wavelength extinction smoke detector, it was necessary to prepare a plurality of light receiving elements corresponding to each of the plurality of optical filters. However, in the present invention, the light was deflected by one deflecting means 4. One light receiving means (for example, one CC) that is arranged so that light of a plurality of wavelengths is incident on different positions for each wavelength and receives light incident on different positions for each wavelength at each position.
D array) 5 only needs to be prepared. As a result, in the present invention, it is possible to avoid complications such as adjustment of components as compared with the above-described related art, and to make the configuration simpler.

In a conventional multi-wavelength extinction smoke detector,
When a specific filter corresponding to a specific wavelength is used and the wavelength to be used is changed, the filter must be replaced. However, in the present invention, the light of all the wavelength components contained in the light from the light source 1 is used. Can be deflected at different angles by the deflecting means (prism) 4, and the light of all deflected wavelength components can be made incident on different light receiving positions (array positions) of the light receiving means (CCD array) 5.
When changing the wavelength to be used, the light receiving means (C
It is only necessary to change the output extraction position of the CD array 5)
There is no need to replace parts. FIG. 3 shows the light-reducing output position of the light receiving means (CCD array) 5, for example,
The case where the wavelength is changed from N _k to N _p and from N _n to N _q is shown. Thus, the wavelength to be used is changed only by changing the output extraction position of the light receiving means (CCD array) 5. be able to. In other words, according to the present invention, light having any desired wavelength can be used without replacing parts.

In connection with this, in the present invention, it is possible to extremely easily take out the dimming output of not only two wavelengths but also three wavelengths, four wavelengths, etc. as a plurality of wavelengths.
That is, in the above-described example, the case of two wavelengths is shown as a plurality of wavelengths. For example, the dim output from the N _k -th array position N _k (red light) of the CCD array 5 and the N _n -th array position A case has been described in which the dimming output from N _n (blue light) is extracted. However, when three wavelengths are desired, the deflecting means (prism) 4 and the light receiving means (CCD array) 5 are used as shown in FIG. Without changing or adding any components, such as N _{k of the} light receiving means (CCD array) 5
Need only retrieve th and dimming output from the dimming output and N _n th array positions N _n from the dimming output and N _m-th array position N _m from the array position N _k. Similarly, when it is desired to use four wavelengths, as shown in FIG. 5, without changing or adding any components such as the deflecting means (prism) 4 and the light receiving means (CCD array) 5, the light receiving element is simply provided. (CCD
Array) 5, for example, N _k-th dimming output and N _n from the dimming output and N _m-th array position N _m from the array position N _k
Dimming output from the _n th array position N _n (blue light) and N _q
It is only necessary to extract the dimming output from the third array position _Nq .

In each of the above examples, the smoke detector has been described. However, the present invention can also be configured as a particle size measuring device for measuring the particle size of fine particles. Alternatively, the apparatus may be configured as a particle type determination device that determines the type of the particles.

FIG. 6 is a diagram showing an example of the configuration of a particle size measuring apparatus according to the present invention. In FIG. 6, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals. 6 is a light source 1 that emits light of a plurality of wavelengths,
Slits 2 and 3 for narrowing the light (light beam) from the light source 1,
A deflecting unit 4 for deflecting light of a plurality of wavelengths emitted from the light source 1 at different angles for each wavelength, and a plurality of wavelengths of light deflected by the deflecting unit 4 are arranged so as to be incident on different positions for each wavelength; Light receiving means 5 for receiving light incident at different positions for each position, and fine particles (in the example of FIG. 6, slits 2 and 3 in the example of FIG. 6) that have entered or exist in the optical path of the light emitted from the light source 1. The light emitted from the light source 1 has entered the optical path based on the dimming output from the respective positions corresponding to the plurality of wavelengths of the light receiving means 5 due to the fine particles that have entered or existed in the detection space 20 between them. Alternatively, it has a detecting means 8 for detecting the particle diameter of the existing fine particles.

FIG. 7 is a diagram showing a configuration example of a particle type discriminating apparatus according to the present invention. In FIG. 7, the same parts as those in FIGS. 1, 2, and 6 are denoted by the same reference numerals. 7 includes a light source 1 that emits light of a plurality of wavelengths, slits 2 and 3 that narrow down the light (light beam) from the light source 1, and a light source of a plurality of wavelengths emitted from the light source 1 for each wavelength. Deflecting means 4 for deflecting light at a plurality of wavelengths at different angles, and a plurality of wavelengths of light deflected by the deflecting means 4 are arranged so as to be incident on different positions for each wavelength. Light receiving means 5 for receiving light
And light receiving means 5 by fine particles which have entered or existed in the optical path of the light emitted from the light source 1 (in the example of FIG. 7, fine particles have entered or existed in the detection space 20 between the slits 2 and 3). Based on the dimming output from each position corresponding to the plurality of wavelengths, the type of fine particles (for example, the type of water vapor, gas, dust, smoke, etc.) that has entered or existed in the optical path of the light emitted from the light source 1 ) Is determined.

As described above, in the particle diameter measuring device and the particle type discriminating device shown in FIGS. 6 and 7, a plurality of wavelengths (in the example of FIGS. 6 and 7, Since a dimming output ratio of (2 wavelengths) is obtained, the particle size of the fine particles or smoke particles can be measured accurately and accurately, and the type of the fine particles can be detected accurately.

In the examples of FIGS. 6 and 7, two wavelengths are used as a plurality of wavelengths. However, not only two wavelengths but also three wavelengths, four wavelengths,... Can be used. That is, in this case, the same configuration as that shown in FIGS. 4 and 5 can be obtained.

As described above, the present invention can be configured not only as a smoke detector but also as a particle size measuring device for measuring the particle size of fine particles. Alternatively, it can also be configured as a particle type determination device that determines the type of the particles.

In each of the above examples (the configuration examples shown in FIGS. 1, 2, 6 and 7), the detection space 20 for detecting fine particles or smoke particles is located between the slits 2 and 3. But,
The detection space 20 can be provided between the slit 3 and the deflecting means 4 or the detection space 20 can be provided
And the light receiving means 5. That is,
The detection space 20 can be provided in any optical path between the light source 1 and the light receiving means 5.

In each of the above examples (the configuration examples shown in FIGS. 1, 2, 6 and 7), the slits 2 and 3 are used to narrow down the light (light beam) from the light source 1. Not only the slits 2 and 3 but also any light collecting means can be used as long as the light from 1 can be collected on the deflecting means 4. For example, a condenser lens or the like can be used instead of the slits 2 and 3.

[0039]

As described above, according to the first, third, fourth, and fifth aspects of the present invention, a light source for emitting light of a plurality of wavelengths and a light source for emitting light of a plurality of wavelengths are provided. Deflecting means for deflecting light of a wavelength at different angles for each wavelength,
A plurality of light beams deflected by the deflecting unit are arranged so as to be incident on different positions for each wavelength, and light receiving units for receiving light incident on different positions for each wavelength for each position, and light emitted from the light source. Based on the dimming output from each position corresponding to the plurality of wavelengths of the light receiving means due to the fine particles that have entered or existed in the optical path of light, the fine particles that have entered or exist in the optical path of the light emitted from the light source By having the detection means for detecting whether or not smoke particles, it is possible to avoid the complexity of adjustment of parts and the like, as compared with the prior art, to make the configuration simpler. It is possible to provide a smoke detector that can use light of any desired plural wavelengths without exchanging parts.

According to the second, third, fourth, and sixth aspects of the present invention, the light source for emitting light of a plurality of wavelengths and the light of the plurality of wavelengths emitted from the light source are separated for each wavelength. Deflection means for deflecting at different angles, and light of a plurality of wavelengths deflected by the deflection means are arranged so as to be incident on different positions for each wavelength, and receive light incident on different positions for each wavelength for each position. The light path of the light emitted from the light source based on the light receiving means and the dimming output from each position corresponding to a plurality of wavelengths of the light receiving means due to the smoke particles that have entered or are present in the light path of the light emitted from the light source. By having detection means for detecting the type of smoke particles that have penetrated or existed inside, the complexity of adjusting parts and the like can be avoided as compared with the related art, and the configuration can be simplified. Can also As multiple wavelengths, it is possible to provide a possible smoke sensor can be used without or light of any desired plurality of wavelengths replace parts.

According to the eighth aspect of the present invention, the light source for emitting light of a plurality of wavelengths, the deflecting means for deflecting the light of a plurality of wavelengths emitted from the light source at different angles for each wavelength, and the deflecting means A light receiving unit that is arranged so that deflected light of a plurality of wavelengths is incident on different positions for each wavelength, and receives light incident on different positions for each wavelength at each position, and an optical path of light emitted from the light source Based on the dimming output from each position corresponding to the plurality of wavelengths of the light receiving means due to the fine particles that have entered or existed inside, the particle diameter of the fine particles that have entered or exist in the optical path of the light emitted from the light source is determined. By having the detection means for detecting, it is possible to avoid the complexity of adjusting components and the like, to simplify the configuration, and as a plurality of wavelengths, light of any desired plurality of wavelengths can be used. parts It is possible to provide a fine particle diameter measuring apparatus capable of using without or replaced.

According to the ninth aspect of the present invention, the light source for emitting light of a plurality of wavelengths, the deflecting means for deflecting the light of the plurality of wavelengths emitted from the light source at different angles for each wavelength, and the deflecting means A light receiving unit that is arranged so that deflected light of a plurality of wavelengths is incident on different positions for each wavelength, and receives light incident on different positions for each wavelength at each position, and an optical path of light emitted from the light source Based on the dimming output from each position corresponding to a plurality of wavelengths of the light receiving means due to the fine particles that have entered or existed inside, the type of the fine particles that have entered or exist in the optical path of the light emitted from the light source is determined. The determination means for avoiding the complexity of component adjustment and the like, the configuration can be simplified, and light of any desired multiple wavelengths can be used as a plurality of wavelengths. It is possible to provide a fine particle type discriminating apparatus capable of using without or replaced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a smoke detector according to the present invention.

FIG. 2 is a diagram showing another configuration example of the smoke detector according to the present invention.

FIG. 3 is a diagram illustrating an example of changing a wavelength used.

FIG. 4 is a diagram illustrating an example in which three wavelengths are used as a plurality of wavelengths.

FIG. 5 is a diagram illustrating an example in which four wavelengths are used as a plurality of wavelengths.

FIG. 6 is a diagram showing a configuration example of a particle size measuring device according to the present invention.

FIG. 7 is a diagram illustrating a configuration example of a particle type determination device according to the present invention.

FIG. 8 is a view showing a conventional smoke detector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light source 2, 3 Slit 4 Deflection means 5 Light receiving means 6, 7, 8 Detection means 9 Discrimination means 20 Detection space

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G059 AA05 BB09 CC19 EE04 EE11 GG02 GG04 HH02 JJ06 JJ19 KK04 LL04 MM01 5C085 AA03 AB03 BA32 CA30 FA06 FA20 FA40

Claims (9)

[Claims] A light source that emits light of a plurality of wavelengths; a deflecting unit that deflects the light of the plurality of wavelengths emitted from the light source at different angles for each wavelength; Are arranged to be incident at different positions on
Light receiving means for receiving light incident at different positions for each wavelength, for each position; and light receiving means for receiving light emitted from the light source, which enter the optical path of light, or exist due to fine particles. Detecting means for detecting whether or not the fine particles that have entered or are present in the optical path of the light emitted from the light source based on the reduced light output from the light source are smoke particles. vessel. 2. A light source for emitting light of a plurality of wavelengths, a deflecting means for deflecting the light of a plurality of wavelengths emitted from the light source at different angles for each wavelength, and a light for each of the wavelengths deflected by the deflecting means. Are arranged to be incident at different positions on
A light receiving unit that receives light incident at a different position for each wavelength for each position, and a plurality of wavelengths corresponding to a plurality of wavelengths of the light receiving unit due to smoke particles that have entered the optical path of light emitted from the light source or are present. Detecting means for detecting the type of smoke particles that have entered or are present in the optical path of the light emitted from the light source based on the dimming output from the position. 3. The smoke detector according to claim 1, wherein a prism is used for said deflecting means. 4. The smoke detector according to claim 1, wherein an array of charge-coupled devices is used as said light receiving means. 5. The smoke detector according to claim 1, wherein said detecting means is provided at a position corresponding to a plurality of wavelengths of the light receiving means by fine particles which have entered or existed in an optical path of light emitted from said light source. A smoke detector characterized in that the particle diameter of the fine particles is detected by taking the ratio of the dimming output to determine whether or not the fine particles are smoke particles. 6. The smoke detector according to claim 2, wherein said detecting means is provided at each position corresponding to a plurality of wavelengths of the light receiving means due to smoke particles entering or existing in an optical path of light emitted from said light source. A smoke detector characterized by detecting the particle diameter of smoke particles by taking the ratio of the dimming output from the detector, and detecting the type of smoke particles by the particle diameter of the fine particles. 7. The smoke detector according to claim 2, further comprising alarm generating means for generating an alarm in accordance with the type of the smoke particles detected by the detecting means. sensor. 8. A light source for emitting light of a plurality of wavelengths, a deflecting means for deflecting the light of a plurality of wavelengths emitted from the light source at different angles for each wavelength, and a light for each of the wavelengths deflected by the deflecting means. Are arranged to be incident at different positions on
Light receiving means for receiving light incident at different positions for each wavelength, for each position; and light receiving means for receiving light emitted from the light source, which enter the optical path of light, or exist due to fine particles. A particle size measuring device, comprising: detecting means for detecting the particle size of fine particles that have entered or existed in the optical path of light emitted from the light source based on the dimming output from the light source. . 9. A light source for emitting light of a plurality of wavelengths, deflecting means for deflecting the light of a plurality of wavelengths emitted from the light source at different angles for each wavelength, and a light for each of the wavelengths deflected by the deflecting means for each wavelength Are arranged to be incident at different positions on
Light receiving means for receiving light incident at different positions for each wavelength, for each position; and light receiving means for receiving light emitted from the light source, which enter the optical path of light, or exist due to fine particles. And a discriminating means for discriminating the type of the fine particles entering or existing in the optical path of the light emitted from the light source based on the dimming output from the light source.