KR20210133439A - A polarizing microscope measuring indoor pollution level and controlling an air purifier - Google Patents

Abstract

The present invention relates to a polarizing microscope, including a stage, an objective lens, a collecting lens, a camera, an image recognition unit, and a controller. When the mode for measuring indoor pollution level is set, the polarizing microscope measures the pollution degree by shooting an enlarged image of fine dust, ultrafine dust, bacteria, viruses, bacteria, etc. According to the degree of pollution, a control command is transmitted to the air purifier through IoT communication. Thus, the polarizing microscope can quickly remove indoor pollutants.

Description

A polarizing microscope measuring indoor pollution level and controlling an air purifier

The present invention relates to a polarizing microscope, and when a mode for measuring the degree of indoor pollution is set, an enlarged image of fine dust, ultrafine dust, bacteria, virus, bacteria, etc. is taken to measure the degree of pollution, and according to the degree of pollution It relates to a polarizing microscope that controls an air purifier by measuring the indoor pollution level to transmit a control command by IoT communication to the air purifier.

Unlike a general optical microscope, a general polarization microscope observes the specimen using the difference in refractive index, and the phase difference caused by the interference between diffracted and non-diffracted rays is expressed as a difference in contrast to observe the specimen. there will be

As an example of such a polarized phase microscope, Patent Registration No. 10-0924574 (polarized phase microscope) proposes a structure for observing the structure and change of a sample using the phase difference of light. an optical image generating unit for obtaining an image of the image; a first transform lens for generating a first-order Fourier transform with respect to the ray passing through the object plane; a λ/4 wave plate spaced apart from the first conversion lens by the focal length of the first conversion lens; a second transform lens for generating a second-order Fourier transform with respect to the ray passing through the λ/4 wave plate; and a phase image generator including a photodetector on which an image of the light beam subjected to the second Fourier transform is formed.

Therefore, it has the effect of tracking extremely fine changes occurring at the cell level by acquiring quantitative phase information with high resolution and low noise ratio for the sample.

However, in environments such as laboratories, a high degree of cleanliness must be maintained to prevent contamination of samples. , a separate air purifier is installed to prevent indoor air from being polluted by such inflow.

Such an air purifier is equipped with a sensor to detect fine dust, ultra-fine dust, and the like, and operates according to the degree of contamination, but has a disadvantage in that it cannot detect bacteria or bacteria.

That is, when fine dust or ultra-fine dust is detected, the intensity is controlled and operated according to the concentration to discharge to the outside or self-collection. This is not done, so there is a problem that contamination is maintained.

In addition, the polarized phase microscope according to the prior art is limited to the purpose of observing the specimen.

<Prior art literature>

- Republic of Korea Patent No. 10-0924574

(polarized phase microscope)

Therefore, in order to solve the conventional problems, the present invention operates as a sensor for detecting indoor contamination by fine dust, ultrafine dust, bacteria, bacteria, viruses, etc. when not using a polarizing microscope, and Accordingly, an object of the present invention is to provide a polarizing microscope that can quickly remove indoor pollutants by controlling the operation of an air purifier through IoT communication.

In order to achieve the above object, the polarization microscope for controlling the air purifier by measuring the degree of indoor pollution according to the present invention,

a stage on which the specimen is placed;

an objective lens positioned on the upper side of the stage and provided with lenses having different magnifications;

a tube lens positioned on the optical path from the image side of the objective lens to form an intermediate image;

an upper polarizing plate and a lower polarizing plate integrally mounted on the front end of the tube lens and the lower part of the stage to adjust the polarization state of the incident light;

a light source for generating light;

a condensing lens for condensing the generated light on the stage;

a control unit for adjusting the stage to move up and down by power on the guide installed up and down;

a camera installed on the optical path from the upper side of the tube lens;

an image recognition unit for recognizing the image taken from the camera and outputting the recognized result;

a controller that controls the adjusting unit to lower the stage when the indoor pollution measurement mode is set, and outputs a driving control command for the air purification mode or ventilation mode of the air purifier according to the result output from the image recognition unit;

and an IoT module that transmits a control command output from the controller to the air purifier through IoT communication.

In addition, when it is determined that the sample sample is not placed on the stage according to the result recognized by the camera, the controller executes the indoor pollution measurement mode after a certain period of time or sets the mode directly from the user by the mode setting unit. Execute the ground indoor pollution measurement mode.

In addition, when the indoor pollution measurement mode is set, the controller controls the camera to continuously perform a photographing operation at regular time intervals.

When the indoor pollution measurement mode is set, the controller rotates the objective lens to control the preset lens to be positioned on the optical path.

In addition, information on the shape and size of fine dust, ultrafine dust, bacteria, bacteria, and viruses is stored in the image recognition unit, and a recognition result for presence or absence and density is output compared with the image captured by the camera.

The present invention configured as described above measures the degree of indoor air pollution, that is, the degree of contamination by fine dust, ultrafine dust, bacteria, bacteria, viruses, etc., by means of a polarizing microscope, and drives the air purifier appropriately according to the measured results to quickly It can be discharged or collected, thereby maximizing the indoor air purification efficiency.

1 is a view showing the structure of a polarizing microscope of the present invention.
Figure 2 is a view showing the position of the stage for detecting indoor pollution.
3 is an internal block diagram of a control unit;

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention.

In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

The terms used in the present invention have been selected as currently widely used general terms as possible while considering the functions in the present invention, but these may vary depending on the intention or precedent of a person skilled in the art, the emergence of new technology, and the like.

In addition, in a specific case, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding invention.

Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than the name of a simple term.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the embodiments of the present invention illustrated below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

The embodiments of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art.

Fig. 1 is a view showing the structure of a polarizing microscope of the present invention, Fig. 2 is a view showing the position of a stage for detecting indoor pollution, and Fig. 3 is an internal block diagram of the control unit.

1, the polarizing microscope of the present invention includes an eyepiece 10, a tube lens 11, an upper polarizing plate 12, an objective lens 13, a stage 14, an aperture 15, a lower polarizing plate 16 ), a condensing lens 17 , a reflective mirror 18 , a heat absorption filter 19 , a lens 20 , a light source 21 , a control unit 22 , a guide 23 , a camera 24 , a control unit 25 ) is composed of

The eyepiece 10 is a lens for the user to visually observe the sample by bringing the eye closer, and the tube lens 11 collects the light reflected from the reflective mirror 18 to form an intermediate image.

The upper polarizing plate 12 is located on the optical axis, that is, on the optical path from the upper side of the objective lens 13 , and the lower polarizing plate 16 is integrally formed on the lower side of the stage 14 , so that the light incident from the condensing lens 17 is The polarization state is adjusted.

The objective lens 13 condenses the light passing through the stage 14 and enlarges it to form a real image. A plurality of lenses having different magnifications are mounted, and the selected one lens is rotated to be positioned on the optical path. configured to make this possible.

The stage 14 is on which a sample for observation is placed, and is installed so as to vertically reciprocate on the guide 23 for focusing. A sensor for detecting may be provided.

The diaphragm 15 adjusts the incident amount of light generated from the light source 21 , and the condensing lens 17 collects the light reflected by the reflective mirror 18 to focus the light on the sample placed on the stage 14 . The reflective mirror 18 is to change the direction of the light generated from the light source to the direction of the stage 14 .

The heat absorption filter 19 absorbs heat generated from the light source 21 , the lens 20 converts the light generated from the light source 21 into parallel light, and the light source 21 has a constant intensity on the sample. to provide the light of

The adjusting unit 22 controls the degree of movement of the stage 14 moving in the vertical direction on the guide 23. In the present invention, the vertical position of the stage 14 is adjusted by power such as a motor. .

The camera 24 is located on the upper side of the tube lens 11 on the optical path to photograph the air pollutants enlarged by the objective lens 13, and the shooting time and shooting interval are controlled by the control unit 25. will be set

For example, in order to obtain an accurate image of air pollutants, a shooting time (eg, aperture exposure time) is set for shooting a still image rather than a moving picture, and the shooting interval (eg, 0.2 to 0.5 second interval) is set. This is set

As shown in FIG. 3 , the control unit 25 receives images of air pollutants, that is, fine dust, ultrafine dust, bacteria, bacteria, viruses, etc. captured from the camera 24 from the image recognition unit 26 and recognizes them. Thus, the type and density are analyzed, and for this purpose, data for various types of comparison images are stored.

That is, it has images of various types of fine dust, ultrafine dust, bacteria, bacteria, viruses, etc. for comparison with air pollutants photographed from the camera 24 .

In addition, a known image recognition technology can be used as a technique for image recognition, and as an example, registered patent No. 10-1017323 (image processing apparatus and method for real-time object shape comparison), etc. may be used.

When the indoor pollution measurement mode is set, the controller 27 controls the adjusting unit 22 to lower the stage 14 to a preset position as shown in FIG. 2 to focus on the upper side of the stage 14. And, by controlling the objective lens driver 31, the objective lens 13 is rotated so that a preset lens among the plurality of lenses is located on the optical path.

That is, in order to obtain a real image of indoor pollutants, a lens having an appropriate magnification is placed on the optical path.

In addition, by controlling the camera 24 to control the aperture exposure time and exposure interval, that is, the photographing time and the photographing interval, an image of air pollutants floating in the air can be photographed.

In addition, when the indoor pollution measurement mode is set by the user by the mode setting unit 28, the execution can be controlled, or alternatively, when it is detected that the sample is not placed by the sensor provided in the stage 14, , the indoor pollution measurement mode is executed after the time set by the timer 32 .

That is, when the user sets the timer 32 for 20 minutes, for example, when 20 minutes have elapsed after the state in which the sample is not placed on the stage 14 is detected, the polarization microscope is not used for a long time, so it is automatically The indoor pollution measurement mode is executed.

And, when the type and density of indoor pollutants are measured by the image recognition unit 26 by the reference value or more, the controller 27 outputs a command for controlling the air purifier to the IoT module 30 .

The IoT module 30 provides an air purifier with a control command through IoT communication to quickly purify indoor air polluted by bacteria, bacteria, and viruses as well as fine dust and ultra-fine dust.

The operation of the present invention configured in this way will be described in detail.

In order to observe the sample placed on the stage 13, the controller 27 removes the control unit 22 to move the stage 14 to its original initial position, and the control unit 22 is operated by power and , and also has a structure that can be manually finely manipulated by the user.

Therefore, the light generated from the light source 21 is placed on the lens 20 positioned on the light path, the reflective mirror 18, the condensing lens 17, the lower polarizing plate 16, the diaphragm 15, and the stage 14. Since it is incident to the voltage lens 10 through the sample, the objective lens 13, the upper polarizing plate 12, and the tube lens 11, the user can observe the sample.

When the set time elapses without the sample being placed on the stage 14, the controller 27 executes the indoor pollution measurement mode, and controls the adjusting unit 22 to lower the stage 14 to the set position. , while simultaneously controlling the objective lens driving unit 13 to rotate the objective lens 13 so that the set lens is positioned on the optical path.

Therefore, focusing is performed on the upper part of the stage 14, so that it is possible to photograph floating indoor air pollutants.

Accordingly, under the control of the controller 27, the camera 24 takes pictures of air pollutants according to the set shooting time and shooting interval.

Of course, when the user sets the mode through the mode setting unit 28, the controller 27 directly performs the indoor pollution measurement mode.

The continuous images taken by the camera 24 are input to the image recognition unit 26 to determine the type of indoor pollutants according to the shape and size of the particles and measure the density thereof.

That is, the air pollution degree is measured by measuring the number of indoor pollutants per unit area at the focused position.

Even if the fine dust and ultra-fine dust in the room are below the set concentration by this image recognition, bacteria, bacteria, viruses, etc. are recognized, and if the density is higher than the set value, the measured value by image recognition for the controller 27 and the controller 30 transmits a driving control command according to the degree of indoor pollution to the air purifier through the IoT module 30 .

Accordingly, the air purifier operates according to the driving control command to purify or purify the indoor air, and the indoor pollution measurement mode is executed until the mode is canceled by the user.

In other words, it is efficient to remove fine dust and ultrafine dust by circulating the air in the room and removing it by the filter of the air purifier, and it is efficient to discharge the indoor air to the outside by the ventilation mode for bacteria, bacteria, and viruses. , to transmit a drive control command to the air purifier to appropriately select an air purification mode or a ventilation mode by the filter according to the type of contaminant image recognized by the image recognition unit 26 .

In addition, such an air purifier has a ventilation function as well as indoor air purification.

If the degree of indoor air pollution is less than a set value by driving the air purifier, a driving control command is transmitted to stop the operation of the air purifier.

And, when the user applies a mode release command by the mode setting unit 28, the controller 27 controls the adjusting unit 22 accordingly to adjust the stage 14 to return to its original position.

As described above in detail a specific part of the content of the present invention, for those of ordinary skill in the art, it is clear that this specific description is only a preferred embodiment, and the scope of the present invention is not limited thereby. something to do.

Accordingly, it is intended that the substantial scope of the present invention be defined by the appended claims and their equivalents.

10: eyepiece 11: tube lens
12: upper polarizing plate 13: objective lens
14: stage 15: aperture
16: lower polarizing plate 17: condensing lens
18: reflection mirror 19: heat absorption filter
20: lens 21: light source
22: control unit 23: guide
24: camera 25: control unit
26: image implantation unit 27: control
28: mode setting unit 30: IoT module
31: objective lens driving unit

Claims (5)

a stage on which the specimen is placed;
an objective lens positioned on the upper side of the stage and provided with lenses having different magnifications;
a tube lens positioned on the optical path from the image side of the objective lens to form an intermediate image;
an upper polarizing plate and a lower polarizing plate integrally mounted on the front end of the tube lens and the lower part of the stage to adjust the polarization state of the incident light;
a light source for generating light;
a condensing lens for condensing the generated light on the stage;
a control unit for adjusting the stage to move up and down by power on the guide installed up and down;
a camera installed on the optical path from the upper side of the tube lens;
an image recognition unit for recognizing the image taken from the camera and outputting the recognized result;
a controller that controls the adjusting unit to lower the stage when the indoor pollution measurement mode is set, and outputs a driving control command for the air purification mode or ventilation mode of the air purifier according to the result output from the image recognition unit;
An IoT module that transmits a driving control command output from the controller to the air purifier through IoT communication; A polarizing microscope for controlling the air purifier by measuring the degree of indoor pollution, characterized in that it consists of.
According to claim 1, wherein the controller executes the indoor pollution measurement mode after a predetermined time or directly from the user by the mode setting unit when it is determined that the sample sample is not placed on the stage according to the recognized result of being photographed by the camera A polarizing microscope that controls the air purifier by measuring the indoor pollution level, characterized in that the indoor pollution measurement mode is executed when the mode setting is made.
The polarization microscope according to claim 1, wherein when the indoor pollution measurement mode is set, the controller controls the camera to continuously perform a photographing operation at a predetermined time interval. .
The method of claim 1, wherein when the indoor pollution measurement mode is set, the controller rotates the objective lens to control the preset lens to be positioned on the optical path. Polarized microscope.
According to claim 1, wherein the image recognition unit stores information on the shape and size of fine dust, ultrafine dust, bacteria, bacteria, and viruses, and the recognition result of the type and density of contaminants compared to the image taken from the camera A polarizing microscope that controls the air purifier by measuring the degree of indoor pollution, characterized in that it outputs

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