CN114279942A - Laser dust particle counting sensor - Google Patents
Laser dust particle counting sensor Download PDFInfo
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- CN114279942A CN114279942A CN202210069639.XA CN202210069639A CN114279942A CN 114279942 A CN114279942 A CN 114279942A CN 202210069639 A CN202210069639 A CN 202210069639A CN 114279942 A CN114279942 A CN 114279942A
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Abstract
The invention relates to the technical field of sensors, in particular to a laser dust particle counting sensor which comprises a mirror body fixing shell, wherein a cavity fixing frame is fixedly arranged in the mirror body fixing shell, a photoelectric receiving converter and a plane concave reflecting mirror are fixedly arranged in the cavity fixing frame, an air inlet channel and an air outlet channel are respectively arranged at two ends of the cavity fixing frame, a light absorption mechanism is fixedly arranged at one end of the mirror body fixing shell, and a light dimming mechanism is fixedly arranged at the other end of the mirror body fixing shell. The invention has the advantages that: one hundred eighty degree parallel light channels are formed through the light absorption mechanism, the light adjusting mechanism, the laser, the plano-convex collimating mirror and the semi-cylindrical mirror, one hundred eighty degree parallel focusing reflection lines are formed inside the cavity fixing frame through the action of the plane concave reflecting mirror, the gas inlet and outlet channels, the light channels and the parallel focusing reflection lines are arranged at ninety degrees to be detected according to the scattering method principle, and the detection efficiency can be effectively improved.
Description
Technical Field
The invention relates to a laser dust particle counting sensor.
Background
The dust particle counting sensor is a main measuring system for measuring particle size distribution by a light scattering counting method, and is widely applied to cleanliness detection in departments of electronics, materials, pharmacy, laboratories and the like. Optical sensors are the core part of the measurement system, but there are some problems with existing laser dust particle counting sensors:
the existing laser dust particle counting sensor structure mostly adopts plastic parts, is easy to damage, has no reasonable design in the whole structure, and not only has low detection concentration, but also has low precision.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a laser dust particle counting sensor.
The purpose of the invention is realized by the following technical scheme: a laser dust particle counting sensor comprises a mirror body fixing shell, wherein a cavity fixing frame is fixedly arranged inside the mirror body fixing shell, a photoelectric receiving converter and a plane concave reflector are fixedly arranged inside the cavity fixing frame, an air inlet channel and an air outlet channel are respectively arranged at two ends of the cavity fixing frame, a light absorbing mechanism is fixedly arranged at one end of the mirror body fixing shell, a light adjusting mechanism is fixedly arranged at the other end of the mirror body fixing shell, a laser is fixedly arranged inside the light adjusting mechanism, a plano-convex collimating mirror and a semi-cylindrical mirror are arranged on one side of the light adjusting mechanism, the plano-convex collimating mirror and the semi-cylindrical mirror are fixedly arranged inside the mirror body fixing shell, and dust is detected according to the scattering method principle through mutual matching of the photoelectric receiving converter, the plane concave reflector, the air inlet channel, the air outlet channel, the light absorbing mechanism, the light adjusting mechanism, the laser, the plano-convex collimating mirror and the semi-cylindrical mirror, the detection precision is enhanced.
Preferably, the cavity with cavity mount looks adaptation is seted up to the inside of mirror body set casing, the inlet port and the exhaust hole with inlet channel and exhaust passage looks adaptation are seted up respectively to the top and the bottom of cavity, the extinction groove with extinction mechanism looks adaptation is seted up to the one end at cavity middle part, the mounting groove with half-cylinder mirror looks adaptation is seted up to the other end at cavity middle part, provides the fixed stay for equipment through the mirror body set casing, makes equipment component through mirror body set casing interrelatedness, is convenient for carry out integration dismouting to equipment.
Preferably, a fixing plate is arranged on one side of the cavity fixing frame, the fixing plate and the mirror body fixing shell are fixedly installed through screws, through holes communicated with the air inlet hole and the air outlet hole are formed in the top and the bottom of the cavity fixing frame, light guide holes with the centers being the same straight line are formed in the two ends of the middle of the cavity fixing frame, the photoelectric receiving converter and the plane concave reflector are fixed through the cavity fixing frame, and operation of keeping away from equipment is facilitated.
Preferably, the photoelectric receiving converter is located at the center of the plane concave reflecting mirror, the photoelectric receiving converter is located at the center of the cavity fixing frame, the photosensitive area is arranged inside the cavity fixing frame, the focusing central points of the photoelectric receiving converter and the plane concave reflecting mirror are designed in a parallel structure and are fixed in the photosensitive area of the cavity fixing frame, the focusing central point is located at the center of the photosensitive area, and a focusing reflection line parallel to one hundred eighty degrees is formed in the photosensitive area through the photoelectric receiving converter and the plane concave reflecting mirror.
Preferably, the light absorbing mechanism, the light adjusting mechanism, the laser, the plano-convex collimating mirror and the semi-cylindrical mirror are located on the same straight line, so that a one-hundred-eighty-degree parallel light path is formed between the light absorbing mechanism, the light adjusting mechanism, the laser, the plano-convex collimating mirror and the semi-cylindrical mirror, the air inlet channel and the air outlet channel are both fixedly mounted with the mirror body fixing shell, the air inlet channel and the air outlet channel are located on the same straight line, so that a one-hundred-eighty-degree parallel air inlet and outlet channel is formed between the air inlet channel and the air outlet channel, the central line of the air inlet channel is perpendicular to the central line of the light adjusting mechanism, and the one-hundred-eighty-degree parallel light path and the one-hundred-eighty-degree parallel air inlet and outlet channel are perpendicular to the one-hundred-eighty-degree parallel focusing reflection line.
Preferably, the light absorption mechanism and the semi-cylindrical mirror are respectively positioned at two sides of the cavity fixing frame, the plano-convex collimating mirror is positioned at one side of the semi-cylindrical mirror far away from the light absorption mechanism, the plano-convex collimating mirror is positioned between the semi-cylindrical mirror and the dimming mechanism, the light absorption mechanism is set to be in a hollow conical shape, and the surface is subjected to dark black oxidation treatment.
Preferably, a fixing groove matched with the laser is formed in the dimming mechanism, and the laser is adjusted through the dimming mechanism.
The invention has the following advantages:
this laser dust particle count sensor, adopt metal structure with the machined part, plate the dark oxidation of black film, satisfy the use under the adverse conditions such as high temperature and high humidity, make equipment be difficult for being damaged, strengthen the stability of equipment, form one hundred eighty degree parallel inlet/outlet air duct through inlet channel and exhaust passage, through extinction mechanism, the mechanism of adjusting luminance, a laser instrument, plano-convex collimating mirror and half cylindrical mirror form one hundred eighty degree parallel light passageway, the effect through the concave speculum in plane forms one hundred eighty degree parallel focusing reflection ray in the inside of cavity mount, to pass in and out the air duct, light passageway and parallel focusing reflection ray set up to ninety degrees each other and carry out the scattering method principle and detect, can effectively improve the efficiency that detects, improve the precision that detects, can detect the high concentration.
Drawings
FIG. 1 is a schematic view of a first perspective structure of the present invention;
FIG. 2 is a schematic view of a second perspective structure of the present invention;
FIG. 3 is a schematic cross-sectional view of the present invention;
in the figure: the device comprises a 1-mirror body fixing shell, a 2-cavity fixing frame, a 3-photoelectric receiving converter, a 4-plane concave reflector, a 5-air inlet channel, a 6-air outlet channel, a 7-light absorption mechanism, an 8-dimming mechanism, a 9-laser, a 10-planoconvex collimating mirror and a 11-semi-cylindrical mirror.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in figures 1-3, a laser dust particle counting sensor comprises a mirror body fixing shell 1, a cavity fixing frame 2 is fixedly arranged in the mirror body fixing shell 1, a photoelectric receiving converter 3 and a plane concave reflecting mirror 4 are fixedly arranged in the cavity fixing frame 2, an air inlet channel 5 and an air outlet channel 6 are respectively arranged at two ends of the cavity fixing frame 2, a light absorbing mechanism 7 is fixedly arranged at one end of the mirror body fixing shell 1, a light dimming mechanism 8 is fixedly arranged at the other end of the mirror body fixing shell 1, a laser 9 is fixedly arranged in the light dimming mechanism 8, a plano-convex collimating mirror 10 and a semi-cylindrical mirror 11 are arranged at one side of the light dimming mechanism 8, the plano-convex collimating mirror 10 and the semi-cylindrical mirror 11 are fixedly arranged in the mirror body fixing shell 1, and the light absorbing mechanism 7 passes through the photoelectric receiving converter 3, the plane concave reflecting mirror 4, the air inlet channel 5, the air outlet channel 6 and the light absorbing mechanism 7, The light adjusting mechanism 8, the laser 9, the plano-convex collimating lens 10 and the semi-cylindrical lens 11 are matched with each other to detect dust according to the scattering method principle, the detection precision is enhanced, a cavity matched with the cavity fixing frame 2 is arranged in the lens body fixing shell 1, the top and the bottom of the cavity are respectively provided with an air inlet hole and an air outlet hole matched with the air inlet channel 5 and the air outlet channel 6, one end of the middle part of the cavity is provided with a light absorption groove matched with the light absorption mechanism 7, the other end of the middle part of the cavity is provided with a mounting groove matched with the semi-cylindrical lens 11, the lens body fixing shell 1 is used for providing fixed support for equipment, so that equipment components are mutually associated through the lens body fixing shell 1, the equipment is conveniently and integrally disassembled and assembled, one side of the cavity fixing frame 2 is provided with a fixing plate, the fixing plate and the lens body fixing shell 1 are fixedly mounted through screws, the top and the bottom of the cavity fixing frame 2 are provided with through holes communicated with the air inlet hole and the air outlet hole, the two ends of the middle part of the cavity fixing frame 2 are provided with light guide holes with the centers of the same straight line, and the photoelectric receiving converter 3 and the plane concave reflecting mirror 4 are fixed through the cavity fixing frame 2, so that the operation of keeping away from equipment is facilitated.
The photoelectric receiving converter 3 is positioned at the center of the plane concave reflector 4, the photoelectric receiving converter 3 is positioned at the center of the cavity fixing frame 2, a photosensitive area is arranged in the cavity fixing frame 2, the focusing central points of the photoelectric receiving converter 3 and the plane concave reflector 4 are designed in a parallel structure and are fixed in the photosensitive area of the cavity fixing frame 2, the focusing central point is positioned at the center of the photosensitive area, a focusing reflection line with one hundred eighty degrees parallel is formed in the photosensitive area through the photoelectric receiving converter 3 and the plane concave reflector 4, the light absorbing mechanism 7, the dimming mechanism 8, the laser 9, the plano-convex collimating mirror 10 and the semi-cylindrical mirror 11 are positioned on the same straight line, a one hundred eighty degrees parallel light path is formed among the light absorbing mechanism 7, the dimming mechanism 8, the laser 9, the plano-convex collimating mirror 10 and the semi-cylindrical mirror 11, the air inlet channel 5 and the air outlet channel 6 are both fixedly installed with the mirror body fixing shell 1, the air inlet channel 5 and the air outlet channel 6 are positioned on the same straight line, so that a one-hundred-eighty-degree parallel air inlet and outlet channel is formed between the air inlet channel 5 and the air outlet channel 6, the central line of the air inlet channel 5 is vertical to the central line of the light adjusting mechanism 8, and a one-hundred-eighty-degree parallel light path and a one-hundred-eighty-degree parallel air inlet and outlet channel are vertical to one-hundred-eighty-degree parallel focusing reflection lines.
The light absorption mechanism 7 and the half-cylindrical surface mirror 11 are respectively positioned at two sides of the cavity fixing frame 2, the planoconvex collimating mirror 10 is positioned at one side of the half-cylindrical surface mirror 11 far away from the light absorption mechanism 7, the planoconvex collimating mirror 10 is positioned between the half-cylindrical surface mirror 11 and the dimming mechanism 8, the light absorption mechanism 7 is set to be in a hollow cone shape, dark black oxidation treatment is carried out on the surface, a fixing groove matched with the laser 9 is formed in the dimming mechanism 8, and the laser 9 is adjusted through the dimming mechanism 8.
The working process of the invention is as follows: adopt the metal structure spare with the machined part, the black coating dark oxidation of plating, satisfy the use under the abominable conditions such as high temperature and high humidity, make equipment be difficult for being damaged, the stability of reinforcing equipment, form one hundred eighty degree parallel inlet and outlet gas passageway through inlet channel 5 and exhaust passage 6, through extinction mechanism 7, dimming mechanism 8, laser instrument 9, planoconvex collimating mirror 10 and half cylindrical mirror 11 form one hundred eighty degree parallel light passageway, form one hundred eighty degree parallel focusing reflection ray in the inside of cavity mount 2 through the effect of plane concave reflecting mirror 4, with inlet and outlet gas passageway, light passageway and parallel focusing reflection ray set up to ninety degrees each other and carry out the scattering method principle and detect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A laser dust particle counting sensor, characterized by: comprises a lens body fixing shell (1), a cavity fixing frame (2) is fixedly arranged in the lens body fixing shell (1), a photoelectric receiving converter (3) and a plane concave reflector (4) are fixedly arranged in the cavity fixing frame (2), an air inlet channel (5) and an air outlet channel (6) are respectively arranged at the two ends of the cavity fixing frame (2), one end of the mirror body fixing shell (1) is fixedly provided with a light absorption mechanism (7), the other end of the lens body fixing shell (1) is fixedly provided with a light adjusting mechanism (8), a laser (9) is fixedly arranged in the dimming mechanism (8), a plano-convex collimating lens (10) and a semi-cylindrical lens (11) are arranged on one side of the dimming mechanism (8), the plano-convex collimating lens (10) and the semi-cylindrical lens (11) are fixedly arranged in the lens body fixing shell (1).
2. The laser dust particle counting sensor of claim 1, wherein: the novel lens is characterized in that a cavity matched with the cavity fixing frame (2) is formed in the lens body fixing shell (1), an air inlet hole and an air exhaust hole matched with the air inlet channel (5) and the air exhaust channel (6) are formed in the top and the bottom of the cavity respectively, a light absorption groove matched with the light absorption mechanism (7) is formed in one end of the middle of the cavity, and a mounting groove matched with the semi-cylindrical lens (11) is formed in the other end of the middle of the cavity.
3. The laser dust particle counting sensor of claim 1, wherein: the fixing plate is arranged on one side of the cavity fixing frame (2), the fixing plate and the mirror body fixing shell (1) are fixedly installed through screws, through holes communicated with the air inlet holes and the air exhaust holes are formed in the top and the bottom of the cavity fixing frame (2), and light guide holes with the centers being the same straight line are formed in the two ends of the middle of the cavity fixing frame (2).
4. The laser dust particle counting sensor of claim 1, wherein: the photoelectric receiving converter (3) is positioned at the center of the plane concave reflector (4), and the photoelectric receiving converter (3) is positioned at the center of the cavity fixing frame (2).
5. The laser dust particle counting sensor of claim 1, wherein: the light absorption mechanism (7), the dimming mechanism (8), the laser (9), the plano-convex collimating mirror (10) and the semi-cylindrical mirror (11) are located on the same straight line, the air inlet channel (5) and the air outlet channel (6) are fixedly mounted with the mirror body fixing shell (1), the air inlet channel (5) and the air outlet channel (6) are located on the same straight line, and the central line of the air inlet channel (5) is perpendicular to the central line of the dimming mechanism (8).
6. The laser dust particle counting sensor of claim 1, wherein: the light absorption mechanism (7) and the semi-cylindrical mirror (11) are respectively positioned at two sides of the cavity fixing frame (2), the plano-convex collimating mirror (10) is positioned at one side of the semi-cylindrical mirror (11) far away from the light absorption mechanism (7), and the plano-convex collimating mirror (10) is positioned between the semi-cylindrical mirror (11) and the dimming mechanism (8).
7. The laser dust particle counting sensor of claim 1, wherein: and a fixing groove matched with the laser (9) is formed in the dimming mechanism (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210069639.XA CN114279942A (en) | 2022-01-21 | 2022-01-21 | Laser dust particle counting sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210069639.XA CN114279942A (en) | 2022-01-21 | 2022-01-21 | Laser dust particle counting sensor |
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| Publication Number | Publication Date |
|---|---|
| CN114279942A true CN114279942A (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210069639.XA Pending CN114279942A (en) | 2022-01-21 | 2022-01-21 | Laser dust particle counting sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115468881A (en) * | 2022-11-14 | 2022-12-13 | 珩辉光电测量技术(吉林)有限公司 | Optical equipment for laser particle counting |
| CN115586114A (en) * | 2022-11-24 | 2023-01-10 | 珩辉光电测量技术(吉林)有限公司 | Atmospheric environment micro-nano particulate particle size measuring device based on scattering spectrometry |
-
2022
- 2022-01-21 CN CN202210069639.XA patent/CN114279942A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115468881A (en) * | 2022-11-14 | 2022-12-13 | 珩辉光电测量技术(吉林)有限公司 | Optical equipment for laser particle counting |
| CN115586114A (en) * | 2022-11-24 | 2023-01-10 | 珩辉光电测量技术(吉林)有限公司 | Atmospheric environment micro-nano particulate particle size measuring device based on scattering spectrometry |
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