A photoelectric dust measurement device and method in a high humidity environment

Abstract

The present invention relates to the field of instrumentation technology, and in particular to a photoelectric dust measurement device and method in a high-humidity environment. The photoelectric dust measurement device in a high-humidity environment 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, 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 exhaust hole, 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 has a first inclined surface, the air inlet is directly opposite to the first inclined surface, and the first inclined surface has a striped structure for condensing water vapor in the air. This solves the problem of insufficient dust concentration measurement accuracy in a humid environment and the pollution measurement module.

Description

Technical Field

[0001] The present invention relates to the technical field of instruments and meters, and in particular to a photoelectric dust measuring device and method in a high humidity environment. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] Scattered photoelectric measurement uses the diffuse reflection of dust particles under a light source. A photoelectric sensor (such as a photodiode) monitors the intensity of the scattered light to determine dust concentration. Currently, scattered photoelectric measurement has become the primary method for measuring dust concentration in industry.

[0004] However, in humid working environments like coal mines, large amounts of moisture enter the measuring device, contaminating the optical modules within, reducing measurement accuracy and shortening their service life. Achieving dust monitoring in humid environments and preventing contamination of the measuring modules presents a technical challenge that needs to be addressed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the embodiment of the present invention aims to provide a photoelectric dust measurement device and method in a high humidity environment, so as to solve the problems of insufficient dust concentration measurement accuracy and contamination of the measurement module in a humid environment.

[0006] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A photoelectric dust measurement device for a high-humidity environment comprises: a detection chamber, a double V-shaped structure, a light source, and a photodetector; 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 opposite each other, and the second side wall and the fourth side wall are arranged opposite each other; the first side wall is provided with an air inlet, the third side wall is provided with an exhaust hole, the second side wall is provided with a light source, the fourth side wall is provided with the double V-shaped structure, and the top cover is provided with a photodetector; the double V-shaped structure has a first inclined surface, the air inlet is directly opposite the first inclined surface, and the first inclined surface has a striped structure for condensing water vapor in the air.

[0008] In another preferred embodiment of the present invention, the position of the air inlet on the first side wall falls within 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, and the distance from the intersection line of the extended surface of the first inclined surface and the second side wall to the first side wall is b, where a<b.

[0009] In another preferred embodiment of the present invention, the double V-shaped structure also includes a second inclined surface, a third inclined surface and a fourth inclined surface connected in sequence, the first and second inclined surfaces constitute a V-shape, the third and fourth inclined surfaces constitute a V-shape, one end of the first and fourth inclined surfaces is connected to the fourth side wall, the first inclined surface and the fourth inclined surface are equal in length, with a length of c, the second inclined surface and the third inclined surface are equal in length, with a length of d, where c>d.

[0010] In another preferred embodiment of the present invention, the double V-shaped structure is a double V-shaped light absorption structure, and light holes are opened on the second inclined surface and the third inclined surface, and the light holes are on the extension line of the light beam of the light source.

[0011] In another preferred embodiment of the present invention, the photoelectric detector is located on the top cover so as to fall on the projection of the light beam of the light source on the top cover.

[0012] In another preferred embodiment of the present invention, the air inlet is provided with an air intake duct, and the exhaust hole is provided with an exhaust fan.

[0013] In another preferred embodiment of the present invention, an inclined bottom plate is provided at the bottom of the detection chamber.

[0014] In another preferred embodiment of the present invention, a drain hole is provided at the lowest position of the inclined bottom plate.

[0015] An embodiment of the present invention further provides a method for measuring photoelectric dust in a high humidity environment, which uses the above-mentioned photoelectric dust measuring device for a high humidity environment to perform measurement.

[0016] In another preferred embodiment of the present invention, the air to be tested enters the detection chamber through the air inlet, the striped structure of the first inclined surface adsorbs water vapor in the air to be tested and causes it to condense, the light source emits a light beam, the air to be tested passes through the light beam and is scattered, and the scattered light beam is received by the photoelectric detector to form a test signal.

[0017] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0018] The air inlet of the photoelectric dust measurement device provided by the present invention faces the first inclined surface of the double-V-shaped structure. The surface of the double-V-shaped light absorption structure near the air inlet contains a striped structure that facilitates the adsorption of water vapor and causes it to condense. This design effectively prevents water vapor from contaminating the measurement module in the test environment, improving the accuracy of dust concentration measurements. It also avoids the use of condensing equipment, reducing overall device power, saving energy, and meeting low power requirements.

[0019] 2. The dual V-shaped light absorption structure of the photoelectric dust measurement module provided by the present invention is different from a simple cylindrical light trap. It has no special requirements for materials and is insensitive to secondary reflection of light. It can effectively prevent light overflow, reduce background light, and increase the dynamic range of the photoelectric detector in measuring light scattering.

[0020] Additional advantages of the present invention will be given in the description which follows, and in part will be obvious from the description which follows, or may be learned through practice of the present invention.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 This is a three-dimensional diagram of a photoelectric dust measurement device in a high humidity environment according to an embodiment of the present invention;

[0024] Figure 2 is a side view of a photoelectric dust measuring device in a high humidity environment according to an embodiment of the present invention;

[0025] Figure 3 is a top view of a photoelectric dust measurement device in a high humidity environment according to an embodiment of the present invention;

[0026] Figure: 1, air intake duct; 2, detection chamber; 3, double V-shaped light absorption structure; 4, photoelectric detector; 5, exhaust fan; 6, light hole; 7, exhaust port; 8, light source; 9, inclined bottom plate; 10, drain hole;

[0027] In order to show the positions of various parts, the distances or sizes between them are exaggerated. The schematic diagram is for reference only. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0029] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0030] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" or "multiple" means two or more.

[0031] As described in the background, working environments such as coal mines are humid, allowing large amounts of water vapor to enter the measuring device, contaminating the optical modules within the device, resulting in reduced measurement accuracy and a shortened service life. To address these technical issues, the present invention proposes a photoelectric dust measurement device for high-humidity environments. This device features a unique dual-V-shaped light-absorbing structure that significantly absorbs water vapor from the air, converting it into water droplets that exit the measurement module, achieving a self-cleaning function and meeting the needs of dust measurement in high-humidity environments.

[0032] like Figure 1-Figure 3 As shown, one embodiment of the present invention describes a photoelectric dust measuring device for a high humidity environment, comprising: 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, the first side wall and the third side wall are arranged opposite to each other, and the second side wall and the fourth side wall are arranged opposite to each other; the first side wall is provided with an air inlet, the third side wall is provided with an exhaust hole, 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 has a first inclined surface, the air inlet is opposite to the first inclined surface, and the first inclined surface has a striped structure for condensing water vapor in the air.

[0033] The air inlet of the photoelectric dust measurement device provided by the present invention faces the first inclined surface of the double-V-shaped structure. The surface of the double-V-shaped light-absorbing structure, near the air inlet, contains a micro-striped structure that facilitates the adsorption of water vapor and causes it to condense. This design effectively prevents water vapor from contaminating the measurement module in the test environment, improving the accuracy of dust concentration measurements. It also avoids the use of condensation equipment, reduces overall device power, and reduces energy consumption, meeting low-power requirements. The micro-striped structure can be horizontal, vertical, diagonal, or reticular, with a period of 0.1 mm to 0.8 mm.

[0034] like Figure 1 、 Figure 3As shown, the position of the air inlet on the first side wall falls within the projection of the first inclined surface on the first side wall, so that the incoming air can hit the first inclined surface. The distance from the intersection of the first inclined surface and the fourth side wall to the first side wall is a, and the distance from the intersection of the extension of the first inclined surface and the second side wall to the first side wall is b, where a<b. This allows air entering the detection chamber to flow along the first inclined surface toward the position of the light source, that is, to flow along the first side wall toward the second side wall, and then to the exhaust hole through the gap between the light source and the double V-shaped structure.

[0035] The double V-shaped structure is a double V-shaped light-absorbing structure. Light holes are opened on the second inclined surface and the third inclined surface. The light holes are on the extension line of the light source beam so that the collimated light beam of the light source can be injected.

[0036] The double V-shaped light absorption structure of the photoelectric dust measurement device of the present invention is different from a simple cylindrical light trap. It has no special requirements for materials and is insensitive to secondary reflection of light. It can effectively prevent light overflow, reduce background light, and increase the dynamic range of the photoelectric detector in measuring light scattering.

[0037] The air inlet is provided with an air inlet duct, and the exhaust hole is provided with an exhaust fan. The light source is perpendicular to the air inlet direction of the air inlet duct, and the mounting surface of the photoelectric detector is perpendicular to the mounting surface of the air inlet duct and the mounting surface of the light source respectively.

[0038] like Figure 1 、 Figure 2 As shown, an inclined bottom plate is provided at the bottom of the detection chamber, and a drain hole is provided at the lowest position of the inclined bottom plate for collecting and draining contaminated water droplets.

[0039] The embodiment of the present invention further provides a measurement method of the photoelectric dust measurement device in a high humidity environment:

[0040] A light source mounted on one side of the test chamber emits a beam that enters the double-V-shaped light absorption structure through the central aperture, preventing it from overflowing. This reduces background light and increases the dynamic range of the photodetector's light scattering measurements. A test beam is formed between the light source and the central aperture of the double-V-shaped light absorption structure.

[0041] The exhaust fan on the exhaust port works to generate suction, and the air to be tested passes through the air intake duct and enters the detection room. The humid air to be tested hits the side of the double V-shaped light-absorbing structure facing the air intake duct. The surface of the double V-shaped light-absorbing structure close to the air intake duct contains a micro-striped structure, which absorbs water vapor in the air to be tested and causes it to condense. The designed inclined bottom plate collects the contaminated water droplets and discharges them through the drain hole.

[0042] The air to be tested passes through the test light beam and is scattered. The scattered light beam is received by the photoelectric detector located between the double V-shaped light absorption structure and the light source, thereby forming a test signal.

[0043] The air to be tested continues to pass through the exhaust port and is discharged by the exhaust fan.

[0044] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A photoelectric dust measuring device in a high humidity environment, characterized in that: include: Detection chamber, double V-shaped structure, light source and photodetector; The detection chamber includes 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 opposite to each other, and the second side wall and the fourth side wall are arranged opposite to each other; the first side wall is provided with an air inlet, the third side wall is provided with an exhaust hole, 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 has a first inclined surface, the air inlet is directly opposite to the first inclined surface, and the first inclined surface has a striped structure for condensing water vapor in the air; The double V-shaped structure also includes a second inclined surface, a third inclined surface and a fourth inclined surface connected in sequence. The double V-shaped structure is a double V-shaped light-absorbing structure. A light-through hole is opened on the second inclined surface and the third inclined surface. The second inclined surface and the third inclined surface form an inner concave structure of the double V-shaped structure. The light-through hole is located in the inner concave structure, and the light-through hole is on the extension line of the light beam of the light source.

2. The photoelectric dust measuring device in a high humidity environment according to claim 1, characterized in that: The position of the air inlet on the first side wall falls within 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, and the distance from the intersection line of the extended surface of the first inclined surface and the second side wall to the first side wall is b, where a<b.

3. The photoelectric dust measuring device in a high humidity environment according to claim 1, characterized in that: 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 side wall, the first inclined surface and the fourth inclined surface are equal in length, the length is c, the second inclined surface and the third inclined surface are equal in length, the length is d, where c>d.

4. The photoelectric dust measuring device in a high humidity environment according to claim 1, wherein: The photoelectric detector is located on the top cover and falls on the projection of the light beam from the light source on the top cover.

5. The photoelectric dust measuring device in a high humidity environment according to claim 1, characterized in that: The air inlet is provided with an air inlet duct, and the exhaust hole is provided with an exhaust fan.

6. The photoelectric dust measuring device in a high humidity environment according to claim 1, characterized in that: An inclined bottom plate is provided at the bottom of the detection chamber.

7. The photoelectric dust measuring device in a high humidity environment according to claim 1, characterized in that: A drain hole is provided at the lowest position of the inclined bottom plate.

8. A photoelectric dust measurement method in a high humidity environment, characterized in that: The measurement is performed using the photoelectric dust measuring device in a high humidity environment as described in any one of claims 1 to 7.

9. The photoelectric dust measurement method in a high humidity environment according to claim 8, characterized in that: The air to be tested enters the detection chamber through the air inlet. The striped structure of the first inclined surface absorbs water vapor in the air to be tested and causes it to condense. The light source emits a light beam, and the air to be tested passes through the light beam to form a scattered light. The scattered light beam is received by the photoelectric detector to form a test signal.

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