A portable automatic atmospheric particulate matter monitoring device and monitoring method

Abstract

The present invention relates to the technical field of atmospheric particle monitoring, and discloses a portable atmospheric particle automatic monitoring device and a monitoring method, comprising: a monitoring box, a top plate of which is fixedly mounted with a fixing rod and a fixing box, a sliding frame is slidably mounted with a sliding frame at the bottom end of the fixing rod, and two mirror-distributed rotating rollers are rotatably mounted in the sliding frame. According to the present invention, after air is transported to the filter belt through an intake pipe, while a scraping component scrapes the particles adsorbed on the inner wall of the intake pipe, the reciprocating movement of the sliding frame causes the filter belt directly below the intake pipe to reciprocate, thereby causing the position of a to-be-detected area at an air outlet of the intake pipe to continuously change, and at this time, even if the particles scraped off by the scraping component slide down along the inner wall of the intake pipe, they will fall to different positions of the to-be-detected area on the filter belt, thereby making the distribution of the particles more uniform, and avoiding the problem of reduced accuracy of the detection result caused by the accumulation of the scraped particles at the edge of the to-be-detected area.

Description

Technical Field

[0001] The present invention relates to the technical field of atmospheric particle monitoring, and in particular to a portable atmospheric particle automatic monitoring device and a monitoring method. Background Art

[0002] Atmospheric particulate matter, as a complex mixture widely present in the atmospheric environment, covers tiny solid and liquid particles, which together constitute a large and relatively stable suspension system. In view of the significant impact of atmospheric particulate matter on the ecological environment and human health, it is particularly necessary to strengthen the real-time monitoring of atmospheric particulate matter. Through real-time monitoring, the concentration, distribution and changing trend of atmospheric particulate matter can be accurately grasped, providing a scientific basis for assessing the degree of pollution and formulating effective prevention and control measures.

[0003] Currently, when monitoring atmospheric particulate matter, the atmosphere needs to be transported through pipelines. Since the particles in the atmosphere will adhere to the pipelines, the number of atmospheric particles to be monitored will be reduced, affecting the monitoring accuracy.

[0004] In response to the above-mentioned technical problems, the applicant has retrieved some existing technologies to achieve the cleaning of the attachments on the inner wall of the air intake duct. For example, the patent publication number is CN116773416A. Its main technical means is that the second air intake hard pipe extends from the inside of the first air intake hard pipe to form a continuous channel for guiding the particles carried by the external air to be directly deposited on the filter belt, and then the scraper block and the scraper rod move downward in coordination to scrape off the particles adhering to the inner walls of the first air intake hard pipe and the second air intake hard pipe, ensuring that all particles can be collected on the filter belt for further β-ray monitoring. After analysis by the applicant, the disadvantage of this technical solution is that when the scraper block and the scraper rod are used to scrape off the particles on the inner walls of the two sections of the pipe, the particles will be under the action of gravity. The particles scraped off the inner wall of the first air intake hard tube will slide down the tube wall and fall on the port plane of the second air intake hard tube, resulting in that some particles cannot be effectively collected, affecting the comprehensiveness and accuracy of the monitoring, and the particles scraped off the inner wall of the second air intake hard tube are easy to accumulate at the edge of the filter belt, which will not only cause abnormal particle concentration at the edge of the filter belt, but also when performing β-ray monitoring, the accumulation of particles at the edge will cause the path and intensity of the rays when passing through the sample to change, thereby affecting the accuracy of the monitoring results and even causing misjudgment. Based on this, the present invention purposely provides a portable atmospheric particulate matter automatic monitoring device and monitoring method, which can effectively scrape off the particles attached to the inner wall of the intake pipe and ensure that the particles fall on the filter belt and are evenly distributed. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and provide a portable automatic atmospheric particulate matter monitoring device and monitoring method to solve the technical problem that the particulate matter on the inner wall of the intake duct will fall to the edge of the filter belt and accumulate after being scraped off, resulting in inaccurate β-ray monitoring results.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A portable automatic monitoring device for atmospheric particulate matter, comprising:

[0008] The monitoring box has a fixed rod and a fixed box fixedly installed on its top plate, a sliding frame slidably installed on the bottom end of the fixed rod, two mirror-distributed rotating rollers are rotatably installed in the sliding frame, and a waist-shaped groove is opened on it, a rotating wheel is rotatably installed on the fixed box, a sliding block is fixedly installed on the rotating wheel, and it is driven to rotate by a driving component, the sliding block is eccentrically arranged, and it is slidably connected with the waist-shaped groove, a unwinding roller and a winding roller are rotatably installed in the monitoring box, the unwinding roller and the winding roller are both driven to rotate by a driving source, and the two rotate in the same direction, a filter belt is wound on the unwinding roller, and one end of the filter belt is wound on the winding roller through two rotating rollers in sequence;

[0009] An air inlet pipe is fixedly mounted on the top of the monitoring box and is provided with a scraping assembly, the scraping assembly is connected to the driving assembly, the air inlet end of the air inlet pipe is connected to the cutting head, and the cutting head is connected to the sampling tube; and

[0010] The beta ray detection assembly is fixedly installed in the monitoring box and is located directly below the air inlet pipe. The filter belt between the two rotating rollers is located between the air inlet pipe and the scraping assembly.

[0011] As a further solution of the present invention: the scraping assembly includes a ring and a scraping strip, the ring is rotatably mounted on the air outlet end of the air inlet pipe, and is driven to rotate by the driving assembly, and the scraping strip is fixedly mounted on the ring, and is in contact with the inner wall of the air inlet pipe.

[0012] As a further solution of the present invention: the driving assembly includes a driving wheel, a synchronous belt and a transmission assembly, the driving wheel is rotatably installed on the fixed box, and is driven to rotate by the first output source, the driving wheel is connected to the ring through a synchronous belt, and drives the rotating wheel to rotate through the transmission assembly.

[0013] As a further solution of the present invention: the transmission assembly includes a first bevel gear and a second bevel gear, the first bevel gear and the second bevel gear are both rotatably installed in the fixed box, and the two are meshed, the first bevel gear shaft is fixedly connected to the driving wheel, and the second bevel gear shaft is fixedly connected to the rotating wheel.

[0014] As a further solution of the present invention: the radii of the driving wheel, the first bevel gear, the second bevel gear and the rotating wheel are all smaller than the radius of the collar.

[0015] As a further solution of the present invention: a scraper is rotatably mounted on the sliding frame, and a collecting box is arranged on it, the scraper is close to the winding roller, and is driven to rotate by a second output source, the scraper is in abutment with the filter belt, and its discharge end faces the collecting box.

[0016] As a further solution of the present invention: the collection box is slidably inserted into the sliding frame, a limit block is rotatably installed on the sliding frame, and the movement trajectory of the limit block interferes with the movement trajectory of the collection box.

[0017] A portable automatic atmospheric particulate matter monitoring method, the method is applied to a portable automatic atmospheric particulate matter monitoring device as described above, the method comprising the following steps:

[0018] Step S1: The external air is sucked in through the sampling tube, filtered once by the cutting head, and then transported to the monitoring box through the air intake pipe. The particles in the atmosphere will remain on the filter belt to form a detection area, and the atmosphere will pass through the filter belt and be discharged;

[0019] Step S2: The driving component controls the scraping component to scrape off the particles attached to the inner wall of the air inlet pipe. At the same time, the driving component drives the rotating wheel to rotate, thereby driving the sliding block to move. The change of the position of the sliding block in the waist-shaped groove causes the sliding frame to move back and forth, so that the two rotating rollers drive the filter belt to move back and forth, so that the particles scraped off the inner wall of the air inlet pipe slide evenly to the inspection area on the filter belt;

[0020] Step S3: Stop the movement of the scraping assembly and the sliding frame, and then use the β-ray detection assembly to detect the area to be inspected, and detect the particles in the area to be inspected based on the loss of β-rays;

[0021] Step S4: The winding roller and the unwinding roller are controlled to rotate synchronously by the driving source, and the filter belt is wound to a certain extent, so that the clean filter belt is moved to the middle of the air inlet pipe and the β-ray detection component, so that the next detection can be carried out.

[0022] Beneficial effects of the present invention:

[0023] 1. In the present invention, after the air is transported to the filter belt through the air intake pipe, the scraping assembly and the sliding frame move synchronously. While the scraping assembly scrapes the particles adsorbed on the inner wall of the air intake pipe, the reciprocating movement of the sliding frame causes the filter belt directly below the air intake pipe to move back and forth, thereby causing the position of the area to be detected at the air outlet of the air intake pipe to change continuously. At this time, even if the particles scraped by the scraping assembly slide down along the inner wall of the air intake pipe, they will fall to different positions of the area to be detected on the filter belt, thereby making the distribution of the particles more uniform, avoiding the problem of reduced accuracy of the detection result due to the accumulation of the scraped particles at the edge of the area to be detected;

[0024] 2. In the present invention, when the driving assembly drives the collar to rotate, the collar drives the scraper to move along the inner wall of the air intake pipe, and the scraper scrapes the inner wall of the air intake pipe. The scraper scrapes in a circle, which not only improves the scraping efficiency, but also stops directly after the scraping is completed without resetting.

[0025] 3. In the present invention, when the radius of the driving wheel is smaller than the radius of the ring, it means that when the ring rotates one circle, that is, when the scraper scrapes the inner wall of the intake pipe one circle, the driving wheel needs to rotate more circles. Similarly, the radii of the first bevel gear, the second bevel gear and the rotating wheel are all smaller than the radius of the ring, which means that the rotating wheel also needs to rotate more circles. This shows that when the scraper scrapes the inner wall of the intake pipe, the rotating wheel will drive the sliding frame to perform high-frequency reciprocating motion, so that the position of the filter belt changes rapidly, forming vibration, so that the particles falling into the inspection area are constantly vibrated to avoid excessive accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure inside the monitoring box of the present invention;

[0029] Figure 3 It is a schematic structural diagram of a cross-section of an air intake pipe in the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the driving component in the present invention;

[0031] Figure 5 It is a structural schematic diagram of the sliding frame in the present invention;

[0032] Figure 6 It is a matching diagram of the first bevel gear and the second bevel gear in the present invention;

[0033] Figure 7 It is a structural schematic diagram of the limit block in the present invention.

[0034] In the figure: 1. Monitoring box; 2. Air inlet pipe; 3. Cutting head; 4. Sampling tube; 5. Filter belt; 501. Unwinding roller; 502. Winding roller; 503. Rotating roller; 6. β-ray detection component; 7. Scraping component; 701. Ring; 702. Scraping strip; 8. Driving component; 801. Driving wheel; 802. Synchronous belt; 9. Fixed box; 901. First bevel gear; 902. Second bevel gear; 10. Rotating wheel; 11. Sliding block; 12. Fixed rod; 13. Sliding frame; 14. Waist-shaped groove; 15. Scraper; 16. Collecting box; 17. Limit block; 18. Temperature and humidity sensor. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-Figure 7 As shown, the present invention is a portable automatic monitoring device for atmospheric particulate matter, comprising:

[0037] The monitoring box 1 has a fixed rod 12 and a fixed box 9 fixedly installed on its top plate, a sliding frame 13 is slidably installed at the bottom end of the fixed rod 12, two mirror-distributed rotating rollers 503 are rotatably installed in the sliding frame 13, and a waist-shaped groove 14 is opened on it, a rotating wheel 10 is rotatably installed on the fixed box 9, a sliding block 11 is fixedly installed on the rotating wheel 10, and it is driven to rotate by the driving component 8, the sliding block 11 is eccentrically arranged, and it is slidably connected with the waist-shaped groove 14, a winding roller 501 and a winding roller 502 are rotatably installed in the monitoring box 1, the winding roller 501 and the winding roller 502 are both driven to rotate by a driving source, and the two have the same rotation direction, a filter belt 5 is wound on the winding roller 501, and one end of the filter belt 5 is wound on the winding roller 502 through two rotating rollers 503 in sequence;

[0038] An air inlet pipe 2 is fixedly mounted on the top of the monitoring box 1 and is provided with a scraping assembly 7, the scraping assembly 7 is connected to a driving assembly 8, an air inlet end of the air inlet pipe 2 is connected to a cutting head 3, and the cutting head 3 is connected to a sampling tube 4; and

[0039] The β-ray detection assembly 6 is fixedly installed in the monitoring box 1 and is located directly below the air inlet pipe 2 . The filter belt 5 between the two rotating rollers 503 is located between the air inlet pipe 2 and the scraping assembly 7 .

[0040] In one case of this embodiment, a temperature and humidity sensor 18 is fixedly installed on the monitoring box 1 for monitoring the temperature and humidity of the atmosphere. The driving source may be a servo motor, a servo motor and other components, or other mechanisms capable of realizing rotational motion, which are not specifically limited in this embodiment. It should be noted that the air intake pipe 2, the cutting head 3, the temperature and humidity sensor 18 and the β-ray detection assembly 6 described in the present invention are all prior arts, and the present invention does not improve them. Therefore, there is no need to disclose their specific mechanical structure and circuit structure, which does not affect the integrity of the present invention.

[0041] In actual application of this embodiment, the atmosphere is transported through the sampling tube 4, and other particles in the atmosphere that do not need to be detected are filtered through the cutting head 3. Then the air is transported to the filter belt 5 through the intake pipe 2. The particles in the atmosphere will be intercepted by the filter belt 5 to form a detection area, and the air will pass through the filter belt 5 and be discharged directly. When the air is transported in the intake pipe 2, a certain amount of particles will be adsorbed on the inner wall of the intake pipe 2. The scraping component 7 is started by the driving component 8. At this time, the scraping component 7 will scrape the inner wall of the intake pipe 2, thereby scraping off the particles adsorbed on the inner wall of the intake pipe 2. At the same time, the driving component 8 will drive the rotating wheel 10 to rotate through the transmission component, and the rotating wheel 10 drives the sliding block 11 in the waist-shaped groove 1 4, so that the sliding frame 13 slides back and forth on the fixed rod 12. At this time, the position of the filter belt 5 passing through the two rotating rollers 503 will also slide back and forth synchronously, that is, the position of the inspection area will be constantly changed, so the particles scraped on the inner wall of the intake pipe 2 will evenly slide into the inspection area. After a period of time, the movement of the scraping component 7 and the sliding frame 13 is stopped, and then the beta ray emitted by the beta ray detection component 6 is irradiated to the inspection area, thereby completing the atmospheric particle detection of this time, and then the driving source is started to drive the winding roller 502 and the unwinding roller 501 to rotate synchronously, so that the filter belt 5 moves until the clean filter belt 5 moves to the bottom of the air outlet of the intake pipe 2. At this time, the next atmospheric particle detection can be carried out;

[0042] After the air is transported to the filter belt 5 through the intake pipe 2, through the synchronous movement of the scraping component 7 and the sliding frame 13, while the scraping component 7 scrapes the particles adsorbed on the inner wall of the intake pipe 2, the reciprocating movement of the sliding frame 13 will cause the filter belt 5 directly below the intake pipe 2 to move back and forth, so that the position of the area to be detected at the air outlet of the intake pipe 2 is constantly changing. At this time, even if the particles scraped off by the scraping component 7 slide along the inner wall of the intake pipe 2, they will fall on different positions of the area to be detected on the filter belt 5, so that the distribution of the particles is more uniform, avoiding the problem of reduced accuracy of the detection result due to the accumulation of the scraped particles at the edge of the area to be detected.

[0043] like Figure 3As shown, as a preferred embodiment of the present invention, the scraping assembly 7 includes a ring 701 and a scraping strip 702. The ring 701 is rotatably mounted on the air outlet end of the air inlet pipe 2, and is driven to rotate by the driving assembly 8. The scraping strip 702 is fixedly mounted on the ring 701, and is in contact with the inner wall of the air inlet pipe 2.

[0044] In actual application of this embodiment, when the driving component 8 drives the ring 701 to rotate, the ring 701 will drive the scraper 702 to move along the inner wall of the intake pipe 2. The scraper bar 702 scrapes the inner wall of the intake pipe 2. Compared with using a circular ring to move from top to bottom for scraping, it requires a longer stroke and has the problem of low scraping efficiency. After a single scraping, it must return to its original position before the next scraping can be performed. The design of the scraper bar 702 scraping in a circle not only improves the scraping efficiency, but also allows it to stop directly after scraping is completed without resetting.

[0045] like Figure 1-Figure 4 As shown, as a preferred embodiment of the present invention, the driving assembly 8 includes a driving wheel 801, a synchronous belt 802 and a transmission assembly. The driving wheel 801 is rotatably mounted on the fixed box 9, and is driven to rotate by the first output source. The driving wheel 801 is connected to the ring 701 through the synchronous belt 802, and drives the rotating wheel 10 to rotate through the transmission assembly.

[0046] In one case of this embodiment, the first output source may be a servo motor, a servo motor or other components, or other mechanisms capable of achieving rotational motion, which is not specifically limited in this embodiment.

[0047] In actual application of this embodiment, the first output source drives the driving wheel 801 to rotate, and the driving wheel 801 drives the ring 701 to rotate synchronously through the synchronous belt 802, so as to scrape the inner wall of the air intake pipe 2, and the rotation of the driving wheel 801 drives the rotating wheel 10 to rotate synchronously through the transmission component, thereby ensuring that the reciprocating movement of the sliding frame 13 and the scraping work of the scraping component 7 are carried out synchronously, ensuring that the particles scraped off the inner wall of the air intake pipe 2 will evenly fall into the inspection area on the filter belt 5.

[0048] like Figure 6 As shown, as a preferred embodiment of the present invention, the transmission assembly includes a first bevel gear 901 and a second bevel gear 902, the first bevel gear 901 and the second bevel gear 902 are both rotatably installed in the fixed box 9, and the two are meshed, the first bevel gear 901 shaft is fixedly connected to the driving wheel 801, and the second bevel gear 902 shaft is fixedly connected to the rotating wheel 10.

[0049] In actual application of this embodiment, when the driving wheel 801 rotates, it will drive the first bevel gear 901 to rotate. Since the first bevel gear 901 is meshed with the second bevel gear 902, the second bevel gear 902 will rotate synchronously with the first bevel gear 901, and the second bevel gear 902 will drive the rotating wheel 10 to rotate. In this way, through the relationship between the first bevel gear 901 and the second bevel gear 902, the driving wheel 801 and the rotating wheel 10 are linked.

[0050] like Figure 4-Figure 6 As shown, as a preferred embodiment of the present invention, the radii of the driving wheel 801 , the first bevel gear 901 , the second bevel gear 902 and the rotating wheel 10 are all smaller than the radius of the collar 701 .

[0051] In actual application of this embodiment, when the radius of the driving wheel 801 is smaller than the radius of the ring 701, it means that when the ring 701 rotates one circle, that is, when the scraper bar 702 scrapes the inner wall of the intake pipe 2 one circle, the driving wheel 801 needs to rotate more circles. Similarly, the radii of the first bevel gear 901, the second bevel gear 902 and the rotating wheel 10 are all smaller than the radius of the ring 701, which means that the rotating wheel 10 also needs to rotate more circles. This shows that when the scraper bar 702 scrapes the inner wall of the intake pipe 2, the rotating wheel 10 will drive the sliding frame 13 to perform high-frequency reciprocating motion, so that the position of the filter belt 5 changes rapidly, forming vibration, so that the particles falling into the inspection area are constantly vibrated to avoid excessive accumulation.

[0052] like Figure 5-Figure 7 As shown, as a preferred embodiment of the present invention, a scraper 15 is rotatably mounted on the sliding frame 13, and a collecting box 16 is arranged thereon, the scraper 15 is close to the winding roller 502, and is driven to rotate by a second output source, the scraper 15 is in abutment with the filter belt 5, and its discharge end faces the collecting box 16.

[0053] In one case of this embodiment, the second output source may be a servo motor, a servo motor or other components, or other mechanisms capable of achieving rotational motion, which is not specifically limited in this embodiment.

[0054] In actual application, after completing an atmospheric particulate matter detection, since there are particulate matter on the filter belt 5, the scraper 15 is driven by the second output source to rotate and abut against the filter belt 5. At this time, when the position of the filter belt 5 changes, the scraper 15 can scrape off the particulate matter, and the particulate matter slides along the surface of the scraper 15 into the collection box 16 and is collected. In this way, the filter belt 5 is scraped and cleaned and then rolled up onto the winding roller 502, avoiding the problem of the winding position being offset due to the accumulation of particulate matter.

[0055] like Figure 7As shown, as a preferred embodiment of the present invention, the collection box 16 is slidably inserted into the sliding frame 13, and a limit block 17 is rotatably installed on the sliding frame 13, and the movement trajectory of the limit block 17 interferes with the movement trajectory of the collection box 16.

[0056] In actual application of this embodiment, the collection box 16 is installed on the sliding frame 13 by sliding and plugging, which can be convenient for disassembly and installation. After the collection box 16 is fully inserted into the sliding frame 13, the limit block 17 is rotated so that one end of it intercepts the movement trajectory of the collection box 16, thereby limiting and fixing the position of the collection box 16.

[0057] See also Figure 1-Figure 7 As shown, the present invention is a portable automatic atmospheric particulate matter monitoring method, which is applied to a portable automatic atmospheric particulate matter monitoring device as described in the above embodiment, and the method comprises the following steps:

[0058] Step S1: The external air is sucked in through the sampling tube 4, and after being filtered once by the cutting head 3, it is transported to the monitoring box 1 through the air intake pipe 2. The particles in the atmosphere will remain on the filter belt 5 to form a detection area, and the atmosphere will pass through the filter belt 5 and be discharged;

[0059] Step S2: The driving component 8 controls the scraping component 7 to scrape off the particles attached to the inner wall of the air inlet pipe 2. At the same time, the driving component 8 drives the rotating wheel 10 to rotate, thereby driving the sliding block 11 to move. The change of the position of the sliding block 11 in the waist-shaped groove 14 causes the sliding frame 13 to move back and forth, so that the two rotating rollers 503 drive the filter belt 5 to move back and forth, so that the particles scraped off the inner wall of the air inlet pipe 2 slide evenly to the inspection area on the filter belt 5;

[0060] Step S3: Stop the movement of the scraper assembly 7 and the sliding frame 13, and then use the β-ray detection assembly 6 to detect the area to be inspected, and detect the particles in the area to be inspected based on the loss of β-rays;

[0061] Step S4: The winding roller 502 and the unwinding roller 501 are controlled to rotate synchronously by the driving source, and the filter belt 5 is wound to a certain extent, so that the clean filter belt 5 is moved between the air inlet pipe 2 and the β-ray detection component 6, so that the next detection can be carried out.

[0062] Working principle of the present invention: The above embodiment of the present invention provides a portable automatic atmospheric particulate matter monitoring device and monitoring method. Air is transported to the filter belt 5 through the air intake pipe 2. The particulate matter in the atmosphere will be intercepted by the filter belt 5 to form a detection area, and the air will pass through the filter belt 5 and be discharged directly. When the air is transported in the air intake pipe 2, a certain amount of particulate matter will be adsorbed on the inner wall of the air intake pipe 2. The scraping component 7 is started by the driving component 8. At this time, the scraping component 7 will scrape the inner wall of the air intake pipe 2, thereby scraping off the particulate matter adsorbed on the inner wall of the air intake pipe 2. At the same time, the driving component 8 will drive the rotating wheel 10 to rotate through the transmission component, and the rotating wheel 10 drives the sliding block 11 to change in the waist-shaped groove 14. The position of the scraping component 7 and the sliding frame 13 is changed, so that the sliding frame 13 slides back and forth on the fixed rod 12. At this time, the position of the filter belt 5 passing through the two rotating rollers 503 will also slide back and forth synchronously, that is, the position of the inspection area will be constantly changed. Therefore, the particles scraped on the inner wall of the intake pipe 2 will evenly slide into the inspection area. After a period of time, the movement of the scraping component 7 and the sliding frame 13 is stopped, and then the beta rays emitted by the beta ray detection component 6 are irradiated to the inspection area, thereby completing the atmospheric particle detection this time, and then the driving source is started to drive the winding roller 502 and the unwinding roller 501 to rotate synchronously, so that the filter belt 5 moves until the clean filter belt 5 moves to the bottom of the air outlet of the intake pipe 2. At this time, the next atmospheric particle detection can be carried out.

[0063] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A portable automatic monitoring device for atmospheric particulate matter, characterized in that: include: A monitoring box (1) has a top plate fixedly mounted with a fixed rod (12) and a fixed box (9); a sliding frame (13) is slidably mounted on the bottom end of the fixed rod (12); two mirror-distributed rotating rollers (503) are rotatably mounted in the sliding frame (13); a waist-shaped groove (14) is provided on the sliding frame (13); a rotating wheel (10) is rotatably mounted on the fixed box (9); a sliding block (11) is fixedly mounted on the rotating wheel (10); and the rotating wheel (10) is driven by a driving component. (8) driving rotation, the sliding block (11) is eccentrically arranged and slidably connected to the waist-shaped groove (14), a reeling roller (501) and a reeling roller (502) are rotatably installed in the monitoring box (1), the reeling roller (501) and the reeling roller (502) are both driven to rotate by a driving source, and the two rotate in the same direction, a filter belt (5) is wound around the reeling roller (501), and one end of the filter belt (5) is wound around the reeling roller (502) through two rotating rollers (503) in sequence; An air intake pipe (2) is fixedly mounted on the top of the monitoring box (1), and a scraping assembly (7) is provided on the air intake pipe (2), the scraping assembly (7) is connected to the driving assembly (8), the air inlet end of the air intake pipe (2) is connected to the cutting head (3), and the cutting head (3) is connected to the sampling tube (4); and The beta-ray detection component (6) is fixedly installed in the monitoring box (1) and is located directly below the air intake pipe (2); the filter belt (5) between the two rotating rollers (503) is located between the air intake pipe (2) and the beta-ray detection component (6).

2. A portable automatic monitoring device for atmospheric particulate matter according to claim 1, characterized in that: The scraping assembly (7) comprises a collar (701) and a scraping strip (702); the collar (701) is rotatably mounted on the air outlet end of the air inlet pipe (2) and is driven to rotate by the driving assembly (8); the scraping strip (702) is fixedly mounted on the collar (701) and is in contact with the inner wall of the air inlet pipe (2).

3. A portable automatic monitoring device for atmospheric particulate matter according to claim 2, characterized in that: The driving assembly (8) comprises a driving wheel (801), a synchronous belt (802) and a transmission assembly. The driving wheel (801) is rotatably mounted on the fixed box (9) and is driven to rotate by a first output source. The driving wheel (801) is connected to the sleeve ring (701) through the synchronous belt (802) and drives the rotating wheel (10) to rotate through the transmission assembly.

4. A portable automatic monitoring device for atmospheric particulate matter according to claim 3, characterized in that: The transmission assembly comprises a first bevel gear (901) and a second bevel gear (902); the first bevel gear (901) and the second bevel gear (902) are both rotatably mounted in a fixed box (9) and meshed with each other; the rotating shaft of the first bevel gear (901) is fixedly connected to the driving wheel (801); and the rotating shaft of the second bevel gear (902) is fixedly connected to the rotating wheel (10).

5. A portable automatic monitoring device for atmospheric particulate matter according to claim 3, characterized in that: The radii of the driving wheel (801), the first bevel gear (901), the second bevel gear (902) and the rotating wheel (10) are all smaller than the radius of the collar (701).

6. A portable automatic monitoring device for atmospheric particulate matter according to claim 1, characterized in that: A scraper (15) is rotatably mounted on the sliding frame (13), and a collecting box (16) is arranged on the scraper (15). The scraper (15) is close to the winding roller (502) and is driven to rotate by a second output source. The scraper (15) is in abutment with the filter belt (5), and its discharge end faces the collecting box (16).

7. A portable automatic monitoring device for atmospheric particulate matter according to claim 6, characterized in that: The collection box (16) is slidably inserted on the sliding frame (13), and a limit block (17) is rotatably mounted on the sliding frame (13), and the movement trajectory of the limit block (17) interferes with the movement trajectory of the collection box (16).

8. A portable automatic monitoring method for atmospheric particulate matter, characterized in that: The method uses a portable automatic atmospheric particulate matter monitoring device as described in any one of claims 1 to 7, and the method comprises the following steps: Step S1: external air is sucked in through the sampling tube (4), filtered once by the cutting head (3), and then transported to the monitoring box (1) through the air inlet pipe (2). The particulate matter in the atmosphere will remain on the filter belt (5) to form a detection area, and the atmosphere will pass through the filter belt (5) and be discharged; Step S2: the driving component (8) controls the scraping component (7) to scrape off the particles attached to the inner wall of the air inlet pipe (2). At the same time, the driving component (8) drives the rotating wheel (10) to rotate, thereby driving the sliding block (11) to move. The change in the position of the sliding block (11) in the waist-shaped groove (14) causes the sliding frame (13) to move back and forth, so that the two rotating rollers (503) drive the filter belt (5) to move back and forth, thereby causing the particles scraped off the inner wall of the air inlet pipe (2) to slide evenly onto the inspection area on the filter belt (5); Step S3: stopping the movement of the scraping component (7) and the sliding frame (13), and then detecting the area to be inspected by the β-ray detection component (6), and detecting the particles in the area to be inspected based on the loss of β-rays; Step S4: The reeling roller (502) and the unreeling roller (501) are controlled to rotate synchronously by a driving source, and the filter belt (5) is reeled to a certain extent, so that the clean filter belt (5) is moved to the middle of the air inlet pipe (2) and the β-ray detection component (6), so that the next detection can be carried out.

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