KR20160103287A - Detection apparatus for micro dust and organism - Google Patents

Abstract

Disclosed is an apparatus for detecting fine dust and microorganisms, which can remarkably increase a detection performance for fine dust and microorganisms by minimizing the introduction of surrounding light into many focal points formed during a detection process. To this end, the apparatus comprises a sample chamber body, a light emitting part, and a light receiving part. The sample chamber body includes: a sample chamber having an oval-shaped interior and into which a sample to be measured is introduced; a light irradiation hole through which incident light is irradiated; and a first light emission hole and a second light emission hole for the emission of incident light irradiated on the sample. The light emitting part irradiates the light irradiation part with the incident light, and blocks surrounding light introduced to the incident light. The light receiving part transmits the light emitted from the first light emission hole after the separation of a path into a first path and a second path, detects scattered light after blocking surrounding light introduced into emitted light transmitted through the first path, and further detects fluorescence light from the emitted light transmitted through the second path.

Description

TECHNICAL FIELD [0001] The present invention relates to a device for detecting fine dust and microorganisms,

An embodiment according to the concept of the present invention relates to an apparatus for detecting fine dust and microorganisms, and more particularly to a fine dust and microorganism detecting apparatus capable of simultaneously detecting fine dust and microorganisms and minimizing light noise, And a detection device.

As the industry develops, the generation of pollutants is also increasing. These pollutants contain various harmful substances such as fine dusts and microorganisms. In recent years, it has been found that among such pollutants, materials such as fine dusts and microorganisms that can be frequently encountered in the environment can have a fatal effect on the human body. At the national level, it is also possible to predict the dustiness, . In addition to forecasting national or regional scales to prevent and minimize substantial damage to micro dust and microorganisms, continuous monitoring and countermeasures in public spaces or facilities where people are inundated are essential. In accordance with these demands, research and development on devices capable of highly precise detection of fine dusts and microorganisms are being continuously carried out. Conventional microorganism detection techniques have been used to collect samples for measurement in the atmosphere, to culture the collected samples in a medium, and to detect microorganisms through the number of cultured microorganisms and the like. However, this method has a disadvantage in that it takes several hours to several days or more to cultivate the captured microorganisms. Recently, researches on an optical detector capable of monitoring the atmospheric state in real time have been actively conducted.

1 is a view showing a conventional optical detector for detecting fine dust and microorganisms. The optical detector shown in Fig. 1 irradiates the measurement sample in the sample chamber 31 with light while the measurement sample aerosol flows into the sample chamber 31 whose inner wall surface is the ellipsoidal mirror 32 , And collects scattered light and fluorescence generated by collision with the measurement sample to detect fine dust and microorganisms. However, in the conventional optical detector, since the lower light exit port 36 is formed around the optical stopper 38 and the hole size must be large so that the scattered light can be emitted through the hole, There is a great possibility that ambient light is incident. Further, since the light from the light source unit 33 is focused on the optical stopper 38 rather than the first focus 32-1 of the ellipsoidal mirror 32 into which the measurement sample flows, there is a problem that the detection efficiency is lowered.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a fine dust and microorganism detecting device capable of maximizing detection capability by minimizing light noise caused by various ambient light formed in the process of detecting fine dust and microorganisms.

Another technical problem to be solved by the present invention is to increase the detection efficiency by setting the same optical path of scattered light and fluorescent light for detecting fine dust and microorganisms, and to provide a microscope capable of simultaneously detecting fine dust and microorganisms in real time Dust, and microorganisms.

According to an embodiment of the present invention, there is provided an apparatus for detecting fine dust and microorganisms, comprising: a sample chamber into which a measurement sample is introduced, the interior of which is formed into an elliptic shape, a light incidence hole through which incident light is incident, A sample chamber body including a first light exit port and a second light exit port, a light emitting section for emitting the incident light to the light incidence section and for blocking ambient light introduced into the incident light, The light is divided into a first path and a second path, the scattered light is detected by blocking ambient light introduced into the outgoing light transmitted to the first path, and fluorescence is detected from the outgoing light transmitted to the second path Receiving portion.

And a second optical system that is disposed between the light source unit and the light incidence unit and condenses the incident light emitted from the light source unit to a first focal point of the elliptic mirror, And a first light control unit disposed between the first optical system and the light source unit and including a plurality of light control units to block the ambient light incident on the incident light.

Each of the plurality of light control units may be characterized in that an opening is formed at a central portion thereof.

At this time, the plurality of light control units may be arranged so that a larger opening is formed closer to the first optical system.

Wherein the light receiving unit comprises a second optical system for separating outgoing light emitted to the first light output port into scattered light and fluorescence and transmitting the separated light to the first path and the second path and blocking ambient light flowing into the first path, A first detector for detecting scattered light transmitted to the first path, and a second detector for detecting fluorescence transmitted to the second path.

The second optical system includes a first condensing lens unit for changing the emitted light diffused and emitted to the first light output port into a parallel light and a second condensing lens unit for converting the scattered light whose wavelength is not changed in the parallel light transmitted from the first condensing lens unit A second converging lens unit that converges the scattered light transmitted to the first path to the first detecting unit, and a second condensing lens unit that transmits the fluorescence to the first path, A second light control unit disposed between the detection unit and the second condenser lens unit for blocking ambient light introduced into the light condensed by the second condenser lens unit, 2 detection unit.

The second light control unit may include at least one light control unit, and an opening may be formed at the center of the light control unit.

And the first detection unit is located outside the condensing focus of the second condenser lens unit.

According to the embodiment, the apparatus for detecting fine dust and microorganisms according to an embodiment of the present invention stops the outgoing light emitted to the second light outlets so as to block the flow of the ambient light around the sample room into the first light outlets And may further include an optical stopper portion.

As described above, the apparatus for detecting fine dust and microorganisms according to an embodiment of the present invention minimizes the inflow of ambient light to various optical foci formed in the detection process, thereby remarkably improving the performance of detecting fine dust and microorganisms have.

In other words, the ability to detect fine dust and microorganisms can be greatly improved by blocking the incident light and the ambient light introduced into the emitted light.

Also, the apparatus for detecting fine dust and microorganisms according to an embodiment of the present invention may have the same path for scattered light for micro dust detection and for fluorescence for microorganism detection, and may be designed to match the inflow position of the measurement sample aerosol and the optical focusing position of the light source unit Thereby improving the ability to simultaneously detect fine dust and microorganisms.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to more fully understand the drawings recited in the detailed description of the present invention, a detailed description of each drawing is provided.
1 is a view showing a conventional optical detector for detecting fine dust and microorganisms.
2 is a view showing an apparatus for detecting fine dust and microorganisms according to the present invention.
Fig. 3 is a diagram showing in detail the inside of the detection device shown in Fig. 2; Fig.
4 is a diagram showing the light transmitting portion shown in Figs. 2 and 3 in more detail.

It is to be understood that the specific structural or functional descriptions of embodiments of the present invention disclosed herein are only for the purpose of illustrating embodiments of the inventive concept, But may be embodied in many different forms and is not limited to the embodiments set forth herein.

Embodiments in accordance with the concepts of the present invention are capable of various modifications and may take various forms, so that the embodiments are illustrated in the drawings and described in detail herein. It should be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms disclosed, but includes all modifications, equivalents, or alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are intended to distinguish one element from another, for example, without departing from the scope of the invention in accordance with the concepts of the present invention, the first element may be termed the second element, The second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, the terms "comprise", "having", and the like are used to specify that there are described features, numbers, steps, operations, elements, parts or combinations thereof, and that one or more other features, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.

FIG. 2 is a view showing an apparatus for detecting fine dust and microorganisms according to the present invention, and FIG. 3 is a diagram showing the inside of the detecting apparatus shown in FIG. 2 in more detail.

Referring to FIGS. 2 and 3, a micro dust and microorganism detecting apparatus (hereinafter referred to as a "detecting apparatus") 10 according to an embodiment of the present invention includes a sample chamber body 100 A light emitting unit 200 for emitting light to the sample chamber 110 and a light receiving unit 300 for detecting scattering light and fluorescence light emitted from the sample chamber 110.

The sample chamber 110 provided by the sample chamber body 100 may be configured as an egg-shaped space and a mirror surface, that is, an elliptical mirror 120 is disposed on part or all of the inner wall of the sample chamber 110 , And a measurement sample, for example, a sample aerosol, is introduced into the sample chamber 110 through the sample inlet 141.

The sample body 100 may include an upper body 130 and a lower body 140. The sample body 100 may include a light incidence hole 150 and a first light emission hole 160 and a second light emission hole 170, Respectively. The light incident aperture 150 allows the light emitted from the light emitting section 200 to enter the sample chamber 110.

An inlet nozzle of a nozzle unit (not shown) is connected to the sample inlet 141 of the sample body 100. The sample aerosol to be measured is introduced into the sample chamber 110 through the inflow nozzle, and the inflow position is the first focus 121 portion where the light from the light emitting unit 200 is focused.

Although not shown in the drawing, a sample outlet may be provided in the sample body 100 on the opposite side of the sample inlet 141 to discharge the introduced sample aerosol to the outside of the sample chamber 110.

The ellipsoidal mirror 120 in the sample chamber 110 may have two focuses 121 and 122 and the light incident from the light emitting unit 200 may be substantially focused on the first focus 121 of the ellipsoidal mirror 120 And the light impinging on the particles in the measurement sample is scattered and refracted so as to be disposed adjacent to the second focus 122 toward the second focus 122 by the ellipsoid 120 The light is emitted to the outside through the first light output port 160.

The light emitting unit 200 for emitting light to the sample chamber 110 may include a light source unit 210, a first optical system 230, and a first light control unit 250.

The light source unit 210 irradiates the UV light using an LED (Light Emitting Diode) to the measurement sample in the sample chamber 110 through the first optical system 230, and the UV light is introduced into the sample chamber 110 It collides with aerosol particles and generates scattering light and fluorescence light.

The LED, which is a light emitting element of the light source 200, may be arranged to emit light in a direction of incidence to the sample chamber 110, that is, in the direction of the light entrance 150, It is possible to emit light in the UV region of 40 to 40 nm. It is possible to emit light in the UV region of preferably 340 nm to 380 nm to minimize fluorescence of a inanimate object.

The use of a single LED light source by the light source unit 200 to generate the scattered light and fluorescence is advantageous for lowering the system cost and achieving miniaturization than using a general laser or a laser diode (LD) This is because there is an advantage in solving the alignment problem that arises when using four light sources.

A first optical system 230 is disposed between the light source unit 210 and the light incident opening 150 of the sample body 100. The first optical system 230 transmits the light diffused and transmitted from the light source unit 210 to a sample room (Not shown).

The predetermined point is the first focus 121 of the ellipsoid 120. Since the measurement sample aerosol flows into the first focus 121 region, the optical focus of the light source unit 210 and the inflow of the measurement sample It is possible to improve the ability of the detection device 10 to detect fine dust and microorganisms.

At this time, the first light control unit 250 may be disposed between the light source unit 210 and the first optical system 230. For a more detailed description, the following description will be made with reference to the drawings shown in Fig.

4 (a) is an enlarged view of the light emitting unit 200, and FIG. 4 (b) is an enlarged view of the light emitting unit 200. FIG. 4 FIG. 5 is an illustration of light control units that the light control unit 250 includes.

2 to 4, the first light control unit 250 may include a plurality of light control units a1, a2, a3, and a4.

4, only four light control units a1, a2, a3 and a4 are shown for convenience of explanation, but the present invention is not limited thereto, and four or more light control units may be applied according to the design.

4B, an aperture for passing incident light from the light source unit 210 is formed at the center of each of the plurality of light control units a1, a2, a3, and a4 .

At this time, the aperture of each of the plurality of light control units a1, a2, a3, and a4 is set to be smaller as the light source unit 210 is closer to the light source unit 210 (in other words, .

That is, the plurality of light control units a1, a2, a3, and a4 may include a first unit a1, a second unit a2, a third unit a3, and a third unit a3 having a relatively large opening toward the first optical system 230, the third unit a3 and the fourth unit a4.

Accordingly, the light controller 250 blocks ambient light incident on the incident light transmitted from the light source 210 to the first optical system 230, thereby minimizing light noise.

2 and 3, the light receiving unit 300 for detecting scattered light and fluorescence emitted from the first light exit 160 of the sample chamber 110 includes a second optical system 310, a first detecting unit 400 And a second detecting unit 500. [

The second optical system 310 is disposed outside the first light exit 160 of the sample body 100 and includes a first condensing lens unit 320, a spectroscopic element 330, a second condensing lens unit 350, A third condensing lens unit 370, and a second light control unit 380. [

The first condensing lens unit 320 serves to convert light (for example, scattered light and fluorescence) emitted from the first light exit 160 of the sample chamber 110 into a parallel beam.

The spectroscopic element 330 changes the path of the fluorescence whose wavelength is changed among the light passing through the first condensing lens unit 320 to the second path and passes the scattered light whose wavelength is not changed to the first path.

In this case, the third condenser lens portion 370, the second light controller 380, and the first detector 400 are disposed in the first path of scattered light passing through the spectroscopic element 330, and the spectroscopic elements 330 The second focusing lens unit 350 and the second detection unit 500 may be disposed in the second path of the fluorescence whose path is changed in the first path.

The third condenser lens unit 370 disposed between the spectroscopic element 330 and the first detector 400 serves to converge the parallel scattered light having passed through the spectroscopic element 330 to the first detector 400,

At this time, the first detecting unit 400 is positioned outside the focus of the light condensed by the third condensing lens unit 370, and a second light adjusting unit 380 (second condensing unit) is disposed between the first detecting unit 400 and the third condensing lens unit 370 May be disposed.

The second light control unit 380 may include at least one light control unit e. In FIG. 6, only one light control unit e is shown for convenience of explanation, but according to the design, Can be applied.

At the center of the light control unit e is formed an aperture for passing the light emitted from the third condenser lens unit 370 to the first detector 400, It is possible to prevent the inflow of the incoming signal into the first detection unit 400, thereby improving the scattered light detection capability, that is, the fine dust detection capability.

The second condenser lens unit 350 disposed between the spectroscopic element 330 and the second detector 500 serves to converge the parallel fluorescence light whose path has changed in the spectroscopic element 330 to the second detector 500 .

According to an embodiment, the second optical system 310 may further include a band-pass filter (not shown), and the band-pass filter may include a band- It is possible to filter light other than the predetermined band.

The first detecting unit 400 and the second detecting unit 500 respectively detect the presence or absence of dust and microorganisms from the light transmitted through the second focusing lens unit 350 and the third focusing lens unit 370, .

That is, the first detection unit 400 and the second detection unit 500 respectively receive scattered light and fluorescence emitted to the outside of the sample room 110, generate detection signals for the received light, and transmit them to a signal processing unit (not shown) do.

At this time, the first detection unit 400 may be implemented as a photodiode, and the scattered light detected by the first detection unit 400 may include information on the presence and the amount of fine dust.

Since the second detection unit 500 can be implemented as a photo multiplier tube (PMT), the fluorescence detected is the presence or absence of the microorganism and the presence or absence of the microorganism. And may include information on the amount.

The signals detected by the first detection unit 400 and the second detection unit 500 are transmitted to the signal processing unit, and the presence or amount of fine dust and microorganisms are calculated according to a predetermined algorithm.

According to the embodiment, the detection device 10 may further include an optical stopper portion 700 on the side of the second light emission port 170 of the sample body 100.

The optical stopper unit 700 emits the non-diffused light to the second light output port 170 without stopping the first focal point in the main light ray incident into the sample chamber 110 and stops the light.

That is, the optical stopper unit 700 stops the light that does not collide with the particles of the measurement sample in the principal ray incident into the sample chamber 110, so that ambient light other than the scattered light in the sample chamber 110 1 light output port 160 can be minimized.

The optical stopper unit 700 may include a conical member 710 and the conical member 710 may be arranged to face a path of light through which a vertex is emitted and the case 720 may surround the conical member 710 . Therefore, it is possible to prevent direct reflection of the light impinging on the conical member 710. [

In addition, a light absorbing member such as a sponge may be disposed on the surface of the conical member 710 and the surface of the case 720 corresponding to the surface of the conical member 710, or may be embodied as a concavo-convex structure.

According to the embodiment, the optical stopper unit 700 may be disposed in a manner to be in close contact with the sample chamber body 100 to reduce the contour of the detection device 10, and the light emitted from the sample chamber 110 may be a conical A mirror 730 may be provided that is capable of reflecting toward the member 710.

As described above, the detection device 10 according to the embodiment of the present invention coincides the inflow position of the measurement sample with the position where the incident light of the light emitting unit 200 is converged at the first focus 121, ) Is prevented from being excessively light leakage, thereby improving the detection performance.

  In addition, the detection device 10 according to the embodiment of the present invention includes the first light adjuster 250 to minimize the ambient light incident on the incident light, and by providing the second light adjuster 380, It is possible to minimize the influx of ambient light, thereby greatly improving the performance of detecting fine dust and microorganisms.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Detection device 100: Sample body, 110: Sample chamber,
120: ellipse, 121: first focus, 122: second focus,
130: upper body, 140: lower body, 141: sample inlet,
150: light incidence aperture, 160: first light output port, 170: second light output port,
200: light-transmitting section, 210: light source section, 230: first optical system,
250: light control unit, 300: light receiving unit, 310: second optical system,
320: first condenser lens part, 330: spectral element, 350: second condenser lens part,
370 third condensing lens unit, 400 first detection unit, 500 second detection unit,
700: optical stopper portion, 710: conical member

Claims (9)

A sample chamber including a sample chamber into which a measurement sample is introduced and which has an elliptic inner surface, a light incidence port through which incident light is incident, a first light exit port through which the incident light is irradiated onto the measurement sample, Body;
A light emitter for irradiating the incident light to the light incidence portion and for blocking ambient light introduced into the incident light; And
The first path and the second path are separated and transmitted, and the ambient light introduced into the outgoing light transmitted to the first path is blocked to detect scattered light, and the second path And a light receiving unit for detecting fluorescence from emitted light transmitted to the micro-dust and micro-organism detecting device. The light-emitting device according to claim 1,
A light source part for emitting the incident light toward the light incidence part;
A first optical system that is disposed between the light source unit and the light incidence unit and condenses the incident light emitted from the light source unit to a first focus of the elliptical mirror; And
And a first light control unit disposed between the first optical system and the light source unit, the first light control unit including a plurality of light control units to block the ambient light entering the incident light. 3. The apparatus of claim 2, wherein each of the plurality of light conditioning units comprises:
And an opening is formed in the central portion. 4. The apparatus of claim 3, wherein the plurality of light conditioning units comprise:
Wherein a smaller opening is formed and disposed adjacent to the light source portion. The light-emitting device according to claim 1,
A second optical system for separating outgoing light emitted from the first light output port into scattered light and fluorescence and transmitting the scattered light and the fluorescence to the first path and the second path and blocking ambient light flowing into the first path;
A first detector for detecting scattered light transmitted to the first path; And
And a second detector for detecting fluorescence transmitted to the second path. The optical system according to claim 5,
A first condensing lens unit for changing the emitted light diffused and emitted to the first light output port into a parallel light;
A spectroscopic element for transmitting the scattered light whose wavelength is not changed among the parallel light transmitted from the first condenser lens part to the first path and transmitting the fluorescence whose wavelength is changed to the second path;
A second condenser lens unit condensing the scattered light transmitted to the first path to the first detector unit;
A second light adjusting unit disposed between the first detecting unit and the second condensing lens unit for blocking ambient light introduced into the light condensed by the second condensing lens unit; And
And a third condenser lens unit condensing the fluorescence transmitted to the second path to the second detector unit. 7. The apparatus of claim 6, wherein the second light adjuster comprises:
Wherein at least one light adjusting unit is provided and an opening is formed in the center of the light adjusting unit. 8. The apparatus according to claim 7,
Converging lens unit is located outside the light-collecting focus of the second condenser lens unit. The method according to claim 1,
Further comprising an optical stopper portion for stopping the outgoing light emitted to the second light outlets so as to block inflow of the ambient light in the sample room into the first light outlets.

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