PM2.5 concentration detection device based on laser irradiation

Abstract

The utility model relates to the technical field of PM2.5 concentration detection devices, and discloses a PM2.5 concentration detection device based on laser irradiation, which comprises a detection chamber, the front side of the detection chamber is connected with a laser emitter through a fixing assembly, the inner wall of the rear side of the detection chamber is fixedly connected with a photosensitive element, the right side of the detection chamber is in threaded connection with a flow guide cover, and the flow guide cover is in threaded connection with the detection chamber. A protection assembly is arranged on the rear side of the detection chamber, an exhaust assembly is arranged on the left side of the detection chamber, and the fixing assembly comprises a bidirectional threaded rod located at the right end of the front side of the detection chamber and a sliding rod located at the left end of the front side of the detection chamber. According to the utility model, the motor drives the bidirectional threaded rod to rotate so as to control the movement of the two fixing sleeves, so that the separation between the fixing sleeves and the fixing rings is realized, the laser transmitter can be conveniently detached from the interior of the detection chamber, the laser transmitter can be conveniently overhauled, and meanwhile, the cover plate can be connected to the detection chamber by detaching the flow guide cover, so that the detection efficiency is improved. And dust is prevented from entering the detection chamber to influence the PM2.5 concentration detection result when the device is not used.

Description

Technical Field

[0001] The utility model relates to the technical field of PM2.5 concentration detection devices, and in particular to a PM2.5 concentration detection device based on laser irradiation. Background Art

[0002] PM2.5 refers to a type of suspended particulate matter in the atmosphere, which is less than or equal to 2.5 microns in diameter. These particles come from various sources, including automobile exhaust, industrial emissions, coal burning, wood burning, road dust, agricultural activities, etc. PM2.5 particles have a very serious impact on human health and the environment, so it has become one of the important indicators for environmental monitoring and air quality assessment. The laser irradiation PM2.5 concentration detection device uses a laser to irradiate a sample of particulate matter in the air, and indirectly measures the PM2.5 concentration by detecting the scattering of the laser and the particles.

[0003] In conventional PM2.5 concentration detection devices using laser irradiation, the installation of the laser emitter in the detection device is too complicated, which affects the subsequent disassembly and maintenance of the laser emitter. In response to this technical problem, the present application proposes a PM2.5 concentration detection device based on laser irradiation. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a PM2.5 concentration detection device based on laser irradiation is proposed. The two fixed sleeves are controlled to move by the rotation of the bidirectional threaded rod driven by a motor, so as to realize the separation between the fixed sleeves and the fixed rings, so as to facilitate the removal of the laser transmitter from the inside of the detection chamber, and to facilitate the inspection and maintenance of the laser transmitter. At the same time, the cover plate can be connected to the detection chamber by removing the deflector cover, so as to avoid dust from entering the detection chamber when not in use and affecting the result of PM2.5 concentration detection.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a PM2.5 concentration detection device based on laser irradiation, comprising a detection chamber, the front side of the detection chamber is connected to a laser emitter through a fixed component, a photosensitive element is fixedly connected to the inner wall of the rear side of the detection chamber, a flow guide cover is threadedly connected to the right side of the detection chamber, a protective component is arranged on the rear side of the detection chamber, and an exhaust component is arranged on the left side of the detection chamber.

[0006] Furthermore, the fixing assembly includes a bidirectional threaded rod located at the right end of the front side of the detection chamber and a sliding rod located at the left end of the front side of the detection chamber. A fixing ring is fixedly connected to the middle end of the laser emitter, and two fixing sleeves are arranged on the outer wall of the fixing ring.

[0007] Furthermore, the right ends of the two fixing sleeves are both slidably connected to the outer wall of the sliding rod, and the left ends of the two fixing sleeves are both threadedly connected to the outer wall of the bidirectional threaded rod.

[0008] Furthermore, a motor is installed on the top side of the detection chamber through a fixing frame, and the driving end of the motor is fixedly connected to the top end of the bidirectional threaded rod.

[0009] Furthermore, the protection component includes a fixing rope located at the rear side of the detection chamber, one end of the fixing rope is fixedly connected to the outer wall of the detection chamber, and the other end of the fixing rope is rotatably connected to a cover plate, and the outer wall of the cover plate is provided with threads.

[0010] Furthermore, the exhaust assembly includes an exhaust pipe located on the left side of the detection chamber, and an exhaust fan is arranged on the inner wall of the exhaust pipe.

[0011] Furthermore, an operation screen is fixedly connected to the top side of the detection chamber.

[0012] The utility model has the following beneficial effects:

[0013] 1. In the utility model, the two fixed sleeves are controlled to move by rotating the bidirectional threaded rod driven by a motor, so as to realize the separation between the fixed sleeve and the fixed ring, thereby facilitating the disconnection between the laser and the detection chamber, disassembling the laser transmitter, and overhauling the laser transmitter, thereby avoiding the complicated connection of the laser transmitter that is not conducive to disassembly and affects the overhaul efficiency of the laser transmitter.

[0014] 2. In the utility model, the deflector cover is disassembled through the threaded connection between the deflector cover and the detection chamber, and the cover plate is connected to the detection chamber through the threads on the outer wall of the cover plate, so as to prevent dust from entering the detection chamber when the PM2.5 concentration detection device is not in use, thereby affecting the result of PM2.5 concentration detection when it is used next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a stereoscopic diagram of a PM2.5 concentration detection device based on laser irradiation proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the detection chamber structure of a PM2.5 concentration detection device based on laser irradiation proposed by the utility model;

[0017] Figure 3 This is a schematic diagram of the fixed ring structure of a PM2.5 concentration detection device based on laser irradiation proposed by the utility model.

[0018] Legend:

[0019] 1. Detection room; 2. Operation screen; 3. Air deflector; 4. Cover plate; 5. Exhaust pipe; 6. Motor; 7. Bidirectional threaded rod; 8. Sliding rod; 9. Fixed sleeve; 10. Laser transmitter; 11. Fixed rope; 12. Photosensitive element; 13. Exhaust fan; 14. Fixed ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-3 , the utility model provides an embodiment: a PM2.5 concentration detection device based on laser irradiation, comprising a detection chamber 1, a laser emitter 10 is connected to the front side of the detection chamber 1 through a fixed sleeve 9, a photosensitive element 12 is fixedly connected to the inner wall of the rear side of the detection chamber 1, a flow guide cover 3 is threadedly connected to the right side of the detection chamber 1, a cover plate 4 is arranged on the rear side of the detection chamber 1, an exhaust fan 13 is arranged on the left side of the detection chamber 1, an air outlet pipe 5 is located on the left side of the detection chamber 1, an exhaust fan 13 is arranged on the inner wall of the air outlet pipe 5, and an operation screen 2 is fixedly connected to the top side of the detection chamber 1;

[0022] Specifically, when the laser emitter 10 needs to be inspected and repaired, the motor 6 can be started to drive the bidirectional threaded rod 7 to rotate and control the two fixed sleeves 9 to slide on the slide rod 8, so as to achieve the disengagement between the two fixed sleeves 9 and the fixed ring 14, so as to facilitate the removal of the laser emitter 10 from the detection chamber 1 and to facilitate its inspection and repair, thereby avoiding the complicated connection of the laser emitter 10 which is not conducive to disassembly and affects the inspection and repair efficiency of the laser emitter 10. After use, the deflector 3 can be removed from the detection chamber 1, and then the cover plate 4 can be installed on the detection chamber 1 through the threads on the outer wall of the cover plate 4, so as to protect the detection device and prevent dust from entering the interior of the detection chamber 1 through the air inlet and affecting the result of PM2.5 concentration detection when it is used next time.

[0023] A bidirectional threaded rod 7 is located at the right end of the front side of the detection chamber 1, and a sliding rod 8 is located at the left end of the front side of the detection chamber 1. A fixing ring 14 is fixedly connected to the middle end of the laser emitter 10. Two fixing sleeves 9 are arranged on the outer wall of the fixing ring 14. The right ends of the two fixing sleeves 9 are both slidably connected to the outer wall of the sliding rod 8. The left ends of the two fixing sleeves 9 are both threadedly connected to the outer wall of the bidirectional threaded rod 7. A motor 6 is installed on the top side of the detection chamber 1 through a fixing frame. The driving end of the motor 6 is fixedly connected to the top of the bidirectional threaded rod 7. A fixing rope 11 is located at the rear side of the detection chamber 1. One end of the fixing rope 11 is fixedly connected to the outer wall of the detection chamber 1. The other end of the fixing rope 11 is rotatably connected to the cover plate 4. The outer wall of the cover plate 4 is provided with threads.

[0024] Specifically, the two-way threaded rod 7 is driven to rotate by starting the motor 6 to control the two fixed sleeves 9 to slide apart on the slide rod 8, so as to achieve the separation between the two fixed sleeves 9 and the fixed ring 14, so as to facilitate the removal of the laser emitter 10 from the detection chamber 1 and to facilitate its maintenance. After the maintenance is completed, the laser emitter 10 can be inserted into the interior of the detection chamber 1, and then the laser emitter 10 can be fixed on the detection chamber 1 through the cooperation between the two fixed sleeves 9 and the fixed ring 14. When use is completed, the deflector 3 can be removed from the detection chamber 1 through the threaded connection between the deflector 3 and the detection chamber 1, and then the cover plate 4 can be installed on the detection chamber 1 through the threads on the outer wall of the cover plate 4, so as to protect the detection device and prevent dust from entering the interior of the detection chamber 1 through the air inlet, thereby affecting the result of PM2.5 concentration detection when it is used next time.

[0025] Working principle: first install the air deflector 3 through the threaded connection between it and the detection chamber 1, then start the exhaust fan 13 to suck the external air into the interior of the detection chamber 1 through the air deflector 3, and then start the laser transmitter 10, the particles will produce light scattering under the irradiation of the laser, and the particles will scatter the light. The photosensitive element 12 next to it will convert the light signal of the scattered light into an electrical signal, which will be calculated by the MCU into a particle concentration and output. The result of the PM2.5 concentration detection will be displayed on the operation screen 2. The exhaust fan 13 and the laser emitter 10 can be turned off, and the two-way threaded rod 7 can be driven by the start motor 6 to rotate and control the two fixed sleeves 9 to slide apart on the slide rod 8, so that the laser emitter 10 can be removed from the detection chamber 1 for easy maintenance. After the maintenance is completed, the laser emitter 10 can be inserted into the interior of the detection chamber 1, and then the laser emitter 10 can be fixed to the detection chamber 1 through the cooperation between the two fixed sleeves 9 and the fixed ring 14. When use is completed, the deflector 3 can be removed from the detection chamber 1 by connecting the deflector 3 with the detection chamber 1 through the threads, and then the cover plate 4 can be installed on the detection chamber 1 through the threads on the outer wall of the cover plate 4, so as to protect the detection device and prevent dust from entering the interior of the detection chamber 1 through the air inlet, which will affect the result of PM2.5 concentration detection when it is used next time.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A PM2.5 concentration detection device based on laser irradiation, comprising a detection chamber (1), characterized in that: The front side of the detection chamber (1) is connected to a laser emitter (10) via a fixing component, the inner wall of the rear side of the detection chamber (1) is fixedly connected to a photosensitive element (12), the right side of the detection chamber (1) is threadedly connected to a flow guide cover (3), the rear side of the detection chamber (1) is provided with a protection component, and the left side of the detection chamber (1) is provided with an exhaust component.

2. The PM2.5 concentration detection device based on laser irradiation according to claim 1, characterized in that: The fixing assembly comprises a bidirectional threaded rod (7) located at the right end of the front side of the detection chamber (1) and a sliding rod (8) located at the left end of the front side of the detection chamber (1); a fixing ring (14) is fixedly connected to the middle end of the laser emitter (10); and two fixing sleeves (9) are arranged on the outer wall of the fixing ring (14).

3. The PM2.5 concentration detection device based on laser irradiation according to claim 2 is characterized in that: The right ends of the two fixing sleeves (9) are both slidably connected to the outer wall of the sliding rod (8), and the left ends of the two fixing sleeves (9) are both threadedly connected to the outer wall of the bidirectional threaded rod (7).

4. The PM2.5 concentration detection device based on laser irradiation according to claim 1, characterized in that: A motor (6) is installed on the top side of the detection chamber (1) via a fixing frame, and a driving end of the motor (6) is fixedly connected to the top end of a bidirectional threaded rod (7).

5. The PM2.5 concentration detection device based on laser irradiation according to claim 1 is characterized in that: The protection component comprises a fixing rope (11) located at the rear side of the detection chamber (1), one end of the fixing rope (11) is fixedly connected to the outer wall of the detection chamber (1), and the other end of the fixing rope (11) is rotatably connected to a cover plate (4), and the outer wall of the cover plate (4) is provided with a thread.

6. The PM2.5 concentration detection device based on laser irradiation according to claim 1 is characterized in that: The exhaust assembly comprises an exhaust pipe (5) located on the left side of the detection chamber (1), and an exhaust fan (13) is arranged on the inner wall of the exhaust pipe (5).

7. The PM2.5 concentration detection device based on laser irradiation according to claim 1 is characterized in that: An operating screen (2) is fixedly connected to the top side of the detection chamber (1).

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