CN115266505A - Photoelectric dust measuring device and method in high-humidity environment - Google Patents
Photoelectric dust measuring device and method in high-humidity environment Download PDFInfo
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- CN115266505A CN115266505A CN202210919840.2A CN202210919840A CN115266505A CN 115266505 A CN115266505 A CN 115266505A CN 202210919840 A CN202210919840 A CN 202210919840A CN 115266505 A CN115266505 A CN 115266505A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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Abstract
本发明涉及仪器仪表技术领域，尤其涉及一种高湿度环境下的光电粉尘测量装置及方法。高湿度环境下的光电粉尘测量装置，包括：检测室、双V型结构、光源和光电探测器；所述检测室包括第一侧壁、第二侧壁、第三侧壁、第四侧壁和顶盖，所述第一侧壁和第三侧壁相对设置，所述第二侧壁和第四侧壁相对设置；所述第一侧壁设置进气孔，第三侧壁设置排气孔，第二侧壁设置光源，第四侧壁设置双V型结构，顶盖设置光电探测器；所述双V型结构具有第一倾斜面，所述进气孔正对所述第一倾斜面，第一倾斜面具有条纹状结构，用于将空气中的水汽凝结。解决了潮湿环境下粉尘浓度测量精度不足以及污染测量模块的问题。
The invention relates to the technical field of instruments and meters, in particular to a photoelectric dust measurement device and method in a high humidity environment. A photoelectric dust measurement device in a high humidity environment, comprising: a detection chamber, a double V-shaped structure, a light source and a photodetector; the detection chamber includes a first side wall, a second side wall, a third side wall, and a fourth side wall and the top cover, the first side wall and the third side wall are arranged oppositely, the second side wall and the fourth side wall are arranged oppositely; the first side wall is provided with an air inlet hole, and the third side wall is provided with an exhaust gas The second side wall is provided with a light source, the fourth side wall is provided with a double V-shaped structure, and the top cover is provided with a photodetector; the double V-shaped structure has a first inclined surface, and the air inlet is facing the first inclination The first inclined surface has a striped structure for condensing water vapor in the air. It solves the problems of insufficient dust concentration measurement accuracy and pollution of the measurement module in humid environments.
Description
Technical Field
The invention relates to the technical field of instruments and meters, in particular to a photoelectric dust measuring device and method in a high-humidity environment.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The scattering type photoelectric measurement is to determine the concentration of dust by using the scattered reflection of the dust under a light source and monitoring the intensity of the scattered light by a photoelectric sensor (if a photodiode or the like). At present, scattering type photoelectric measurement has become a main mode for measuring dust concentration in industry.
However, the operation environment of coal mines and the like is humid, and a large amount of water vapor enters the measuring device, so that an optical module in the measuring device is polluted, the measuring precision is reduced, and the service life is shortened. How to realize dust monitoring in a humid environment and avoid pollution of a measurement module is a technical problem to be solved.
Disclosure of Invention
Aiming at the defects in the prior art, the embodiment of the invention aims to provide a photoelectric dust measuring device and method in a high-humidity environment, and solves the problems of insufficient dust concentration measuring precision and pollution of a measuring module in the humidity environment.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
an optoelectronic dust measurement device in a high humidity environment, comprising: the device comprises a detection chamber, a double-V-shaped structure, a light source and a photoelectric detector; the detection chamber comprises a first side wall, a second side wall, a third side wall, a fourth side wall and a top cover, wherein the first side wall and the third side wall are arranged oppositely, and the second side wall and the fourth side wall are arranged oppositely; the first side wall is provided with an air inlet, the third side wall is provided with an air outlet, the second side wall is provided with a light source, the fourth side wall is provided with a double-V-shaped structure, and the top cover is provided with a photoelectric detector; the double-V-shaped structure is provided with a first inclined plane, the air inlet hole is opposite to the first inclined plane, and the first inclined plane is provided with a stripe structure and used for condensing water vapor in the air.
In another preferred embodiment of the present invention, the position of the air inlet hole on the first side wall falls into the projection of the first inclined surface on the first side wall; the distance from the intersection line of the first inclined surface and the fourth side wall to the first side wall is a, the distance from the intersection line of the extension surface of the first inclined surface and the second side wall to the first side wall is b, and a is less than b.
In another preferred embodiment of the present invention, the double V-shaped structure further includes a second inclined surface, a third inclined surface and a fourth inclined surface, which are connected in sequence, wherein the first and second inclined surfaces form a V-shape, the third and fourth inclined surfaces form a V-shape, one end of the first and fourth inclined surfaces is connected to the fourth sidewall, the first inclined surface and the fourth inclined surface are equal in length, c is the length, the second inclined surface and the third inclined surface are equal in length, d is the length, and c > d.
In another preferred embodiment of the present invention, the double V-shaped structure is a double V-shaped light absorption structure, and the second inclined surface and the third inclined surface are provided with light holes, and the light holes are on an extension line of the light beam of the light source.
In another preferred embodiment of the present invention, the position of the photodetector on the top cover is located on the projection of the light source beam on the top cover.
In another preferred embodiment of the present invention, the air inlet is provided with an air inlet duct, and the air outlet is provided with an air outlet fan.
In another preferred embodiment of the present invention, an inclined bottom plate is provided at the bottom of the detection chamber.
In another preferred embodiment of the present invention, a drain hole is provided at the lowest position of the inclined floor.
The embodiment of the invention also provides a photoelectric dust measuring method in a high-humidity environment, which utilizes the photoelectric dust measuring device in the high-humidity environment to measure.
In another preferred embodiment of the present invention, the air to be tested enters the detection chamber through the air inlet, the stripe structure of the first inclined surface absorbs the water vapor in the air to be tested to condense the water vapor, the light source emits a light beam, the air to be tested passes through the light beam to form scattering, and the scattered light beam is received by the photodetector to form a test signal.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
1. the air inlet of the photoelectric dust measuring device provided by the invention is over against the first inclined plane of the double-V-shaped structure, and the surface of the first inclined plane of the double-V-shaped light absorption structure close to the air inlet contains a stripe structure, so that water vapor can be conveniently adsorbed and condensed. The design can effectively inhibit the pollution of water vapor to the measuring module in the testing environment, and the measuring precision of the tested dust concentration is improved. Meanwhile, condensation equipment is avoided, the power of the whole equipment is reduced, energy is saved, consumption is reduced, and the requirement of low power consumption is met.
2. The double-V-shaped light absorption structure of the photoelectric dust measurement module is different from a simple cylindrical light trap, has no special requirements on materials, is insensitive to secondary reflection of light, can effectively prevent light from overflowing, reduces background light, and increases the dynamic range of a photoelectric detector for measuring light scattering.
Advantages of additional aspects of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a perspective view of a photoelectric dust measuring device in a high humidity environment according to an embodiment of the present invention;
FIG. 2 is a side view of a photoelectric dust measurement device in a high humidity environment according to an embodiment of the present invention;
FIG. 3 is a top view of a photoelectric dust measurement device in a high humidity environment according to an embodiment of the present invention;
in the figure: 1. an air intake duct; 2. a detection chamber; 3. a double V-shaped light absorbing structure; 4. a photodetector; 5. an exhaust fan; 6. a light-transmitting hole; 7. an exhaust port; 8. a light source; 9. an inclined floor; 10. a sewage draining hole;
the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "plurality" or "a plurality" means two or more.
As described in the background art, the operation environment of coal mines and the like is humid, and a large amount of water vapor enters the measuring device, so that an optical module in the measuring device is polluted, the measuring precision is reduced, and the service life is shortened. In order to solve the technical problems, the invention provides a photoelectric dust measuring device in a high-humidity environment, which is designed with a unique double-V-shaped light absorption structure, wherein the structure can obviously absorb water vapor in the air, and the water vapor is changed into water drops to be discharged out of a measuring module, so that the self-cleaning function is realized, and the dust measuring requirement in the high-humidity environment can be met.
As shown in fig. 1 to fig. 3, an embodiment of the present invention describes a photoelectric dust measuring apparatus in a high humidity environment, including: the device comprises a detection chamber, a double-V-shaped structure, a light source and a photoelectric detector; the detection chamber comprises a first side wall, a second side wall, a third side wall, a fourth side wall and a top cover, wherein the first side wall and the third side wall are arranged oppositely, and the second side wall and the fourth side wall are arranged oppositely; the first side wall is provided with an air inlet, the third side wall is provided with an air outlet, the second side wall is provided with a light source, the fourth side wall is provided with a double-V-shaped structure, and the top cover is provided with a photoelectric detector; the double-V-shaped structure is provided with a first inclined plane, the air inlet hole is opposite to the first inclined plane, and the first inclined plane is provided with a stripe structure and used for condensing water vapor in the air.
The air inlet of the photoelectric dust measuring device provided by the invention is over against the first inclined plane of the double-V-shaped structure, and the surface of the first inclined plane of the double-V-shaped light absorption structure close to the air inlet contains a micro stripe structure, so that water vapor is conveniently adsorbed and condensed. The design can effectively inhibit the pollution of water vapor to the measuring module in the testing environment, and the measuring precision of the tested dust concentration is improved. Meanwhile, the condensing equipment is avoided, the power of the whole equipment is reduced, the energy is saved, the consumption is reduced, and the requirement of low power consumption is met. The micro stripe structure can be a cross stripe structure, a vertical stripe structure, a twill structure, a reticulate pattern structure and the like, and the period is 0.1 mm-0.8 mm.
As shown in fig. 1 and 3, the air inlet hole falls into the projection of the first inclined surface on the first side wall at the position of the first side wall, so that the entering air can hit the first inclined surface. The distance from the intersection line of the first inclined plane and the fourth side wall to the first side wall is a, the distance from the intersection line of the extension plane of the first inclined plane and the second side wall to the first side wall is b, and a is less than b, so that air entering the detection chamber can flow to the position of the light source along the first inclined plane, namely, the air flows to the second side wall along the first side wall and flows to the exhaust hole through the gap between the light source and the double-V-shaped structure.
The double-V-shaped structure is a double-V-shaped light absorption structure, light through holes are formed in the second inclined surface and the third inclined surface and are located on the extension line of the light beam of the light source, and therefore collimated light beams of the light source can be conveniently emitted.
The double-V-shaped light absorption structure of the photoelectric dust measuring device is different from a simple cylindrical light trap, has no special requirements on materials, is insensitive to secondary reflection of light, can effectively prevent light from overflowing, reduces background light, and increases the dynamic range of the photoelectric detector for measuring light scattering.
The air inlet is provided with an air inlet guide pipe, and the exhaust hole is provided with an exhaust fan. The light source is vertical to the air inlet direction of the air inlet guide pipe, and the mounting surface of the photoelectric detector is respectively vertical to the mounting surfaces of the air inlet guide pipe and the light source.
As shown in fig. 1 and 2, an inclined bottom plate is arranged at the bottom of the detection chamber, and a sewage draining hole is arranged at the lowest position of the inclined bottom plate and used for collecting and draining polluted water drops.
The embodiment of the invention also provides a measuring method of the photoelectric dust measuring device under the high-humidity environment, which comprises the following steps:
the light source arranged on one side of the detection chamber emits light beams, and the light beams enter the double-V-shaped light absorption structure through the light through hole in the center of the double-V-shaped light absorption structure, so that the light beams do not overflow, the background light is reduced, and the dynamic range of the photoelectric detector for measuring light scattering is enlarged. And forming a test light beam between the light source and the light through hole in the center of the double V-shaped light absorption structure.
The exhaust fan on the exhaust port works to generate suction, air to be detected enters the detection chamber through the air inlet guide pipe, the humid air to be detected collides against one side of the double-V-shaped light absorption structure, which is right opposite to the air inlet guide pipe, the surface of the double-V-shaped light absorption structure, which is close to one side of the air inlet guide pipe, is provided with a micro strip-shaped structure, water vapor in the air to be detected is adsorbed to be condensed, and the designed inclined bottom plate collects polluted water drops and discharges the polluted water drops through the sewage discharge hole.
The air to be tested passes through the test light beam to form scattering, and the scattered light beam is received by the photoelectric detector arranged in the middle of the double V-shaped light absorption structure and the light source, so that a test signal is formed.
The air to be measured continues to pass through the exhaust port and is exhausted by the exhaust fan.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
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| CN202210919840.2A CN115266505B (en) | 2022-08-01 | 2022-08-01 | A photoelectric dust measurement device and method in a high humidity environment |
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| CN202210919840.2A CN115266505B (en) | 2022-08-01 | 2022-08-01 | A photoelectric dust measurement device and method in a high humidity environment |
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| CN115266505B CN115266505B (en) | 2025-10-03 |
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| CN214408574U (en) * | 2021-01-27 | 2021-10-15 | 北京曼德克环境科技有限公司 | A device for measuring dry smoke concentration |
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| US20100229920A1 (en) * | 2009-03-16 | 2010-09-16 | National Cheng Kung University | Solar concentrator |
| TW201036178A (en) * | 2009-03-16 | 2010-10-01 | Univ Nat Cheng Kung | Solar concentrator |
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