KR101211907B1

KR101211907B1 - Measurement device of mixed gases

Info

Publication number: KR101211907B1
Application number: KR1020100076277A
Authority: KR
Inventors: 염영덕; 이병석; 김경훈; 김현태; 이준화; 김규식
Original assignee: 서울시립대학교 산학협력단
Priority date: 2010-08-09
Filing date: 2010-08-09
Publication date: 2012-12-13
Also published as: KR20120014308A

Abstract

The present invention relates to a mixed gas measuring apparatus, which is provided in a lower plate part, a chamber part mounted to the lower plate part, and a measurement chamber is formed, and provided in the chamber part and provided at the light source part and lower plate part to which the irradiation angle is adjusted and irradiated through the light source part. It includes a detector for detecting light.
In the mixed gas measuring apparatus according to the present invention, the irradiation angle of the light source unit is adjusted to concentrate the light on the sensing unit, thereby improving the gas measuring accuracy.

Description

Mixed Gas Measuring Equipment {MEASUREMENT DEVICE OF MIXED GASES}

The present invention relates to a mixed gas measuring apparatus, and more particularly, to a mixed gas measuring apparatus capable of measuring a plurality of gases at the same time and improving the accuracy for gas measurement.

Recently, the interest in the environment is increasing, and accordingly, the demand for a mixed gas measuring device for measuring various environmental pollutants contained in the air is increasing.

Non-Dispersive Infrared (NDIR) method, which measures environmental pollutants contained in air, uses the principle that gas absorbs specific infrared wavelength.

That is, a change in light output occurs as the gas absorbs a specific infrared wavelength, thereby measuring the concentration of the gas.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

Conventional mixed gas measuring apparatus has a problem that it is difficult to accurately measure the concentration of the gas because the position of the light source and the sensor is fixed.

Therefore, there is a need to improve this.

An object of the present invention is to provide a mixed gas measuring device to measure the concentration of the gas is precisely made by varying the position of the light source and the sensor to improve the above problems.

The present invention to achieve the above object is the lower plate; A chamber part mounted to the lower plate part and having a measurement chamber; A light source unit provided at the chamber unit and configured to adjust an irradiation angle; And a sensing unit provided at the lower plate and sensing a light emitted through the light source unit.

A light source partition wall part mounted on the lower plate part and provided with the light source part; A support partition wall part mounted on the lower plate and spaced apart from the light source partition wall part; Side partition walls coupled to both side ends of the light source partition wall and the support partition wall; And a cover partition wall part coupled to the light source partition wall part, the support partition wall part, and an upper end part of the side partition wall part.

The cover partition wall portion and the side partition wall portion is characterized in that the pad for sealing is provided.

The light source unit is located in the installation space formed in the light source partition wall, the yaw ring coupled to the yaw pin mounted on the light source partition wall portion to rotate left and right; A pitch ring which is positioned inside the yaw ring and rotates up and down in combination with a pitch pin coupled to the yaw ring; And a light source provided in the pitching to irradiate light.

The light source unit may be arranged in plural.

The light source unit yoring ring pressing portion for pressing one side of the yoring; And it characterized in that it further comprises a yoring elastic portion for elastically supporting the other side of the yoring.

The light source unit is a pitching pressing unit for pressing one side of the pitch ring; And a pitching elastic part elastically supporting the other side of the pitching.

The sensing unit is a screw passing through the support partition wall; A driving body provided in the lower plate and coupled to the screw to rotate the screw; A moving body coupled to the screw and moved back and forth in the rotational direction of the screw; And a sensor coupled to the movable body and sensing the light emitted from the light source.

The sensing unit is mounted to the lower plate, characterized in that it further comprises a guide rail for guiding the movable body.

The sensing unit includes a sensing protrusion protruding in the lateral direction from the sensing body; And a movement sensor mounted on the lower plate and sensing a position at which the sensing protrusion passes.

The inner side of the chamber portion is characterized in that it is anodized.

The measuring chamber is characterized in that the temperature and humidity sensor for measuring the temperature and humidity is installed.

The mixed gas measuring apparatus according to the present invention has the effect of concentrating the light emitted from the light source to the detection sensor by adjusting the irradiation angle of the light source.

The mixed gas measuring apparatus according to the present invention has the effect of adjusting the position of the sensor to adjust the distance between the appropriate light source and the sensor for each gas.

In the mixed gas measuring apparatus according to the present invention, a pad is provided in the chamber to suppress the leakage of gas.

The mixed gas measuring apparatus according to the present invention is provided with a plurality of light sources and a sensing sensor corresponding thereto, thereby simultaneously measuring a plurality of gases.

1 is a view schematically showing the appearance of a mixed gas measuring apparatus according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of the chamber portion of the mixed gas measuring apparatus according to an embodiment of the present invention.
3 is a view schematically showing a light source unit of the mixed gas measuring apparatus according to an embodiment of the present invention.
4 is a view schematically showing a sensing unit of the mixed gas measuring apparatus according to an embodiment of the present invention.
5 is an exploded view schematically illustrating a sensing unit of a mixed gas measuring apparatus according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the mixed gas measuring apparatus according to the present invention. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a view schematically showing the appearance of a mixed gas measuring apparatus according to an embodiment of the present invention, Figure 2 is an exploded perspective view of the chamber portion of the mixed gas measuring apparatus according to an embodiment of the present invention, Figure 3 2 is a diagram schematically illustrating a light source unit of a mixed gas measuring apparatus according to an exemplary embodiment.

4 is a view schematically showing a sensing unit of the mixed gas measuring apparatus according to an embodiment of the present invention, and FIG. 5 is an exploded view schematically illustrating a sensing unit of the mixed gas measuring apparatus according to an embodiment of the present invention.

1 to 5, the mixed gas measuring apparatus 1 according to the exemplary embodiment of the present invention includes a lower plate portion 10, a chamber portion 20, a light source unit 30, and a sensing unit 40. .

The chamber 20 is mounted to the lower plate 10 to form the measurement chamber 15. The lower plate portion 10 may be included in the chamber portion 20.

The light source unit 30 is provided in the chamber unit 20 and the position of the light source 33 is changed to adjust the irradiation angle.

The sensing unit 40 is provided in the lower plate 10 and detects light irradiated through the light source unit 30.

The chamber part 20 according to an embodiment of the present invention is provided with a light source partition wall part 21, a support partition wall part 22, a side partition wall part 23, and a cover partition wall part 24.

The light source partition wall portion 21 is mounted to the lower plate portion 10. The bottom surface of the light source partition wall portion 21 is coupled to the lower plate portion 10 by bolting. The light source partition wall part 21 is equipped with a light source part 30 in which the position of the light source 33 varies.

The support partition wall portion 22 is mounted to the lower plate portion 10. The bottom surface of the support partition wall portion 22 is coupled to the lower plate portion 10 by bolting. The support partition wall portion 22 is spaced apart from the light source partition wall portion 21 and has the same length and height as the light source partition wall portion 21.

The side partition wall portion 23 is bolted to each side surface of the light source partition wall portion 21, the support partition wall portion 22, and the lower plate portion 10, and the measurement chamber 15 having an upper opening is formed by this coupling.

The cover partition wall part 24 is coupled to the upper end of the light source partition wall part 21, the support partition wall part 22, and the side partition wall part 23 to close the opened part of the measurement chamber 15.

The cover partition walls 24 and the side partition walls 23 are provided with pads 25 and 26 for sealing. The pad 25 fitted into the groove formed in the side partition wall 23 is in close contact with the light source partition 21, the support partition 22, and the lower plate 10 to prevent leakage of gas. In addition, the pad 26 fitted into the groove formed in the cover partition wall part 24 is in close contact with the light source partition wall part 21, the support partition wall part 22, and the side partition wall part 23 to prevent leakage of gas.

The light source unit 30 according to the exemplary embodiment of the present invention includes a yaw ring 31, a pitch ring 32, and a light source 33 (see FIG. 3).

The yaw ring 31 is located in the installation space 22 formed in the light source partition wall 21. The installation space 22 formed in the light source partition wall part 21 has a hole shape positioned at the center of the light source partition wall part 21.

A yaw pin 311 is mounted to the light source partition wall 21. The yaw pin 311 is fixed to the light source partition wall portion 21 and is inserted into the yaw ring 31. The yaw pin 311 has a cylindrical shape and is inserted into an upper end portion or a lower end portion of the yaw ring 31, so that the yaw ring 31 is rotated left and right using the yaw pin 311 as a rotation axis.

The pitch ring 32 is located inside the yaw ring 31. The pitch pin 321 inserted into the yaw ring 31 is inserted into the pitch ring 32, so that the yoring ring 31 and the pitch ring 32 remain connected. This causes the pitch ring 32 to rotate the same as the yaw ring 31 when the yaw ring 31 is rotated from side to side.

The pitch pin 321 has a cylindrical shape, and is selectively inserted into the left and right side ends of the pitch ring 32, so that the pitch ring 32 is rotated up and down using the pitch pin 321 as the rotation axis.

The light source 33 is mounted inside the pitching 32 and irradiates light forward. This light source 33 emits light rays (normally infrared rays) necessary for measuring the gas concentration. The light source 33 is selected to emit light rays of a suitable wavelength band depending on the absorption characteristics of the gas to be measured. In one embodiment of the present invention, an infrared LED or an infrared lamp is used as the light source 33.

The light source unit 30 is arranged in plurality. That is, in the installation space 22 of the light source partition wall portion 21, a plurality of yaw rings 31 are arranged in the longitudinal direction and rotated to the left and right, and each yaw ring 31 has a pitch ring 32 in which a light source 33 is mounted. It is mounted and rotated up and down.

At this time, the light source 33 mounted to each pitch ring 32 emits light rays of different wavelength bands for multi-gas measurement.

The light source unit 30 according to the exemplary embodiment of the present invention further includes a yaw ring pressing unit 34 and a yaw ring elastic unit 35.

The yoring pressing portion 34 is mounted to the mounting plate 27 fixed to the light source partition wall 21. A micrometer is used as the yaw ring pressing part 34, and pushes the yaw ring 31 or moves away from the yaw ring 31 according to the rotation direction.

The yoring elastic portion 35 is mounted to the mounting plate 27 and elastically supports the other side of the yoring ring 31. Coil spring is used as the yaw ring elastic part 35.

Therefore, when the yaw ring pressing part 34 is rotated in one direction to push the yaw ring 31, the yaw ring elastic part 35 is compressed and the yaw ring 31 rotates in the direction of the yoring elastic part 35. On the other hand, when the yaw ring pressing portion 34 is rotated in the other direction away from the yaw ring 31, the yaw ring elastic portion 35 is expanded, the yaw ring 31 is rotated in the direction of the yaw ring pressing portion 34.

The light source unit 30 according to the exemplary embodiment of the present invention further includes a pitch pressing unit 36 and a pitch elastic unit 37.

The pitching pressurizing part 36 is mounted to the mounting plate 27 fixed to the light source partition wall part 21. As the pitching pressing unit 36, a micrometer is used, and the pitch ring 32 is pushed or moved away from the pitch ring 32 according to the rotation direction.

The pitching elastic part 37 is mounted to the mounting plate 27 and elastically supports the other side of the pitching ring 32. The coil spring is used as the pitching elastic part 37.

Therefore, when the pitching pressing part 36 is rotated in one direction to push the pitching 32, the pitching elastic part 37 is compressed and the pitching 32 is rotated in the direction of the pitching elastic part 37. . On the other hand, when the pitching pressing portion 36 is rotated in the other direction away from the pitching 32, the pitching elastic portion 37 is expanded while the pitching 32 rotates in the direction of the pitching pressing portion 36 do.

The sensing unit 40 according to the exemplary embodiment of the present invention includes a screw 41, a driving body 42, a moving body 43, and a sensing body 44 (see FIGS. 4 and 5).

The screw 41 penetrates through the support partition wall 22. Threads are formed on the outer circumferential surface of the screw 41. The support 17 is fixed to the lower plate 10 so as to support the screw 41.

The support 17 is fixed to the lower plate 10 and is formed with a semi-circular hole is formed is coupled to the base portion 171, the screw 41 is seated, and the upper side of the base portion 171, the semi-circular hole is formed The upper support 172 is provided.

The driving body 42 is mounted to the lower plate 10. The driving body 42 is located outside the chamber portion 20 and is coupled with the screw 41 to rotate the screw 41.

As the driving body 42, a stepping motor for rotating the screw 41 in one direction or the other direction is used.

The movable body 43 has a hole formed therein so that the screw 41 penetrates, and the hole portion is engaged with the screw 41. Therefore, the movable body 43 moves back and forth along the rotational direction of the screw 41.

The detector 44 is coupled to the movable body 43 and detects light emitted from the light source 33. The sensing body 44 according to an embodiment of the present invention is provided with a coupling plate 441, an expansion plate 442, a sensor frame 443, a sensor 444, a substrate 445, and a connecting table 446.

A through hole 449 through which the screw 41 penetrates is formed in the coupling plate 441, and the coupling plate 441 is coupled to the movable body 43. Therefore, as the screw 41 is rotated, the coupling plate 441 moves in association with the movable body 43.

The extension plate 442 is coupled to the coupling plate 441. The expansion plate 442 is equipped with a sensor frame 443, the sensor frame 443 is provided with a detection sensor 444 for detecting the light emitted from the light source (33).

When the plurality of light sources 33 are arranged, the length of the extension plate 442 is extended, and a plurality of sensor frames 443 are arranged to correspond to each light source 33. The sensor 444 is connected to the substrate 445 to transmit a sensed concentration value of the gas, and the connecting table 446 connects the sensor frame 443 to the substrate 445.

The sensing unit 40 according to an embodiment of the present invention is further provided with a guide rail 45. The guide rail 45 is mounted to the lower plate 10 and is formed in the longitudinal direction between the light source partition wall portion 21 and the support partition wall portion 22.

The expansion plate 442 is provided with a connecting body 448 which is moved along the guide rail 45 and is bent so as to be separated from the guide rail 45.

On the other hand, the sensing unit 40 according to an embodiment of the present invention is further provided with a sensing projection 46 and the movement sensor 47.

The sensing protrusion 46 is coupled to the sensing body 44 and protrudes laterally. The movement sensor 47 is mounted on the lower plate 10 and grasps the position of the sensing body 44 through the presence or absence of the sensing protrusion 46.

For example, the movement sensor 47 is provided with a transmitter at the top and a receiver at the bottom, and when the detection protrusion 46 is positioned at the movement sensor 47, the receiver cannot receive the signal of the transmitter. do. At this time, it can be seen that the sensor 44 has reached the position where the movement sensor 47 is installed.

The plurality of movement sensors 47 are arranged in the traveling direction of the sensing protrusions 46, and each movement sensor 47 determines the position of the sensing protrusions 46 by detecting the position of the sensing protrusions 46.

On the other hand, the inner surface of the chamber portion 20 is subjected to anodizing (anodizing) process. In the chamber part 20 which has been anodized black, the diffuse reflection by the light source 33 is suppressed.

The measurement chamber 22 is provided with a temperature and humidity sensor 29 for measuring temperature and humidity. The temperature and humidity sensor 29 is mounted on the inner surface of the chamber 20 or the lower plate 10 to measure the temperature and humidity of the measurement chamber 22.

The control unit controls the temperature and humidity of the gas flowing into the measurement chamber 22 according to the detected value of the temperature and humidity sensor 29.

Referring to the operation of the mixed gas measuring device according to an embodiment of the present invention having the above configuration is as follows.

Gas is introduced into the chamber 20 in which the measuring chamber 22 is formed, and the sensor 444 detects the light beam emitted from the light source 33 to measure the concentration of the gas.

In this case, a plurality of light sources 33 suitable for each gas to be measured are disposed, and the sensing sensor 444 corresponding to each light source 33 senses the light rays of each light source, thereby making it possible to measure a variety of gases. .

The experimenter may adjust the position of the light source 33 so that the light irradiated from the light source 33 is concentrated on the detection sensor 444.

That is, the yaw ring pressing part 34 pushes one side of the yaw ring 31 or moves away from the yaw ring 31 according to the rotational direction, and the other side of the yaw ring 31 is elastically supported by the yoring elastic part 35, thereby providing a yaw ring. 31 is rotated left and right to adjust the irradiation angle of the light source 33.

In addition, the pitching pressing unit 36 pushes one side of the pitch ring 32 or moves away from the pitch ring 32 according to the rotational direction, and the other side of the pitch ring 32 is formed by the pitching elastic unit 37. By being elastically supported, the pitch ring 32 is rotated up and down to adjust the irradiation angle of the light source 33.

Since the optimum distance between the light irradiated from the light source 33 and the detection sensor 444 varies with the absorbance of each gas, the experimenter adjusts the position of the detection sensor 444 according to the type of gas to be measured.

That is, as the driving body 42 is driven, the screw 41 connected thereto is rotated, and the moving body 42 screwed with the screw 41 approaches the light source 33 according to the rotational direction of the screw 42. Away from the light source 33.

At this time, the moving object 43 is coupled to the moving object 43 is provided with a detection body 44 having a detection sensor 444 is moved, thereby ultimately adjusting the distance between the light source 33 and the detection sensor 444. .

A sensing protrusion 46 is mounted on the sensing body 44 to protrude, and the measuring chamber 22 includes a plurality of movement sensors 47 arranged in accordance with the moving position of the sensing protrusion 46. To determine the precise position of the detection sensor 444.

On the other hand, the measurement chamber 22 into which the gas flows is made of a combination of the lower plate portion 10, the light source partition wall portion 21, the support partition wall portion 22, the side partition wall portion 23 and the cover partition wall portion 24, The pads 25 and 26 are provided in the side partition wall part 23 and the cover partition wall part 24, respectively, and the leakage of the gas which flowed into the measurement chamber 22 is suppressed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

10: lower plate 20: chamber portion
21: light source partition wall 22: support partition wall
23: side partition wall portion 24: cover partition wall portion
30 light source unit 31 yoring
32: pitching 33: light source
40: sensing unit 41: screw
42: driving body 43: moving body
44: sensing body 45: guide rail
46: detecting projection 47: moving sensor

Claims

Lower plate;
A chamber part mounted to the lower plate part and having a measurement chamber;
A light source unit provided at the chamber unit and configured to adjust an irradiation angle; And
It is provided in the lower plate, and includes a sensing unit for sensing the light irradiated through the light source unit,
Mixing gas measuring apparatus, characterized in that the inner surface of the chamber portion is anodized.

The method of claim 1, wherein the chamber portion
A light source partition wall unit mounted on the lower plate and provided with the light source unit;
A support partition wall part mounted on the lower plate and spaced apart from the light source partition wall part;
Side partition walls coupled to both side ends of the light source partition wall and the support partition wall; And
And a cover partition wall part coupled to the light source partition wall part, the support partition wall part, and an upper end part of the side partition wall part.

The method of claim 2,
Mixed gas measuring device, characterized in that the cover partition wall portion and the side partition wall portion is provided with a pad for sealing.

The method of claim 3, wherein the light source unit
A yaw ring positioned in an installation space formed in the light source partition wall part and coupled to a yopin mounted on the light source partition wall part to rotate left and right;
A pitch ring which is positioned inside the yaw ring and rotates up and down in combination with a pitch pin coupled to the yaw ring; And
Mixed gas measurement apparatus characterized in that it comprises a light source provided in the pitching for irradiating light.

5. The method of claim 4,
Mixed gas measuring device, characterized in that the plurality of light source is disposed.

The method according to claim 4 or 5,
Yoring ring pressing portion for pressing one side of the yoring; And
Mixed gas measuring apparatus further comprises a yoring elastic portion for elastically supporting the other side of the yoring.

The method according to claim 6,
A pitching pressurizing unit for pressing one side of the pitching ring; And
Mixed gas measuring apparatus further comprises a pitching elastic portion for elastically supporting the other side of the pitching.

The method of claim 3, wherein the detection unit
A screw penetrating the support partition wall;
A driving body provided in the lower plate and coupled to the screw to rotate the screw;
A moving body coupled to the screw and moved back and forth in the rotational direction of the screw; And
Coupled to the moving body, the mixed gas measuring device comprising a sensor for sensing the light emitted from the light source.

The method of claim 8,
Mounted on the lower plate, characterized in that it further comprises a guide rail for guiding the moving body.

The method of claim 8,
A sensing protrusion protruding from the sensing body in a lateral direction; And
Mounted on the lower plate, the mixed gas measuring apparatus further comprises a movement sensor for detecting the position passing through the detection projections.

delete

The method of claim 1,
Mixed gas measurement device, characterized in that the temperature and humidity sensor is installed in the measuring room to measure the temperature and humidity.