Noise monitoring device for environmental monitoring

Abstract

The utility model relates to a noise monitoring device for environmental monitoring, which comprises a supporting plate, a packaging cylinder is mounted at the top of the supporting plate, a noise detector for environmental monitoring is arranged in the packaging cylinder, and a dust cleaning part for cleaning the noise detector is arranged in the packaging cylinder; the dust removing part comprises an air pipe fixedly communicating with the top of the packaging barrel, a fan is installed in the air pipe, a linkage shaft is installed at the bottom end of an output shaft of the fan, installation plates are installed on the two sides of the bottom end of the linkage shaft, and inner cleaning soft brushes and outer cleaning soft brushes are installed at the bottoms of the two ends of the installation plates. The inner cleaning soft brush is used for cleaning the outside of the noise detector, and the outer cleaning soft brush is used for cleaning the inner wall of the packaging cylinder. The problem that the detection effect of the sound detector is affected due to the fact that dust and other impurities adhere to the outside of the sound detector in the prior art is solved, meanwhile, surrounding personnel can be timely and effectively informed, and it is prevented that extra noise interference affects the detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of noise monitoring technology, specifically to a noise monitoring device for environmental monitoring. Background Technology

[0002] Noise monitoring devices can accurately measure the intensity of noise in the environment, quantifying it in decibels (dB). For example, on busy urban roads, monitoring devices can accurately measure the noise intensity generated by vehicles, such as 70-80 decibels. This precise data helps environmental monitoring personnel comprehensively understand the degree of noise pollution in different areas and at different times. This helps environmental management departments identify key areas of noise pollution, providing a scientific basis for subsequent remediation efforts.

[0003] Existing noise monitoring devices, such as those disclosed in CN220228415U, offer several advantages. While the mounting box and noise detector's height can be adjusted for flexibility and convenience, allowing for targeted noise detection from specific directions, existing technologies suffer from several drawbacks. First, when the door is opened to monitor external sounds, dust and other environmental impurities can enter the mounting box and adhere to the outside of the noise detector, affecting its detection performance. Second, this technology fails to promptly and effectively notify nearby personnel during sound detection, potentially generating additional noise or interference near the detector and ultimately impacting its accuracy. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a noise monitoring device for environmental monitoring, so as to solve the problem that dust and other impurities will adhere to the outside of the sound detector and affect the detection effect of the sound detector in the prior art. At the same time, it can also promptly and effectively inform the surrounding personnel to prevent additional noise interference from affecting the accuracy of the detection.

[0005] This utility model is achieved through the following technical solution:

[0006] An environmental noise monitoring device includes a support plate, a sealing cylinder is installed on the top of the support plate, a noise detector for environmental monitoring is installed inside the sealing cylinder, and a dust removal component for cleaning the noise detector is installed inside the sealing cylinder.

[0007] The dust removal component includes a duct fixedly connected to the top of the encapsulation cylinder, a fan installed inside the duct, a linkage shaft installed at the bottom of the output shaft of the fan, mounting plates installed on both sides of the bottom of the linkage shaft, and an inner cleaning soft brush and an outer cleaning soft brush installed at the bottom of both ends of the mounting plate.

[0008] The inner cleaning soft brush is used to clean the outside of the noise detector, and the outer cleaning soft brush is used to clean the inner wall of the packaging cylinder. Two laser dust sensors for detecting dust concentration are installed at the top of the inner cavity of the packaging cylinder, and a warning device for reducing noise interference is installed on the outside of the packaging cylinder.

[0009] The outer side of the encapsulation cylinder has multiple air holes arranged in a ring array. Each air hole has a sealing plate inside, and the top of the support plate has a through hole on one side corresponding to the sealing plate. The bottom end of the sealing plate extends to the bottom of the through hole. A connecting seat is installed at the bottom end of the sealing plate, and an electric push rod is installed at the bottom end of the connecting seat.

[0010] A warning plate is rotatably connected to the top of the sealing cylinder on the side corresponding to the sealing plate, and an elastic telescopic rope is installed on the top of the end of the warning plate away from the air duct. The end of the elastic telescopic rope away from the warning plate passes through the sealing cylinder and is fixed to the top of the sealing plate.

[0011] Furthermore, the warning component includes multiple air holes arranged in a ring array outside the encapsulation cylinder, each air hole having a sealing plate inside, and a through hole on the top of the support plate corresponding to one side of the sealing plate. The bottom end of the sealing plate extends to the bottom of the through hole, and a connecting seat is installed at the bottom end of the sealing plate. An electric push rod is installed at the bottom end of the connecting seat.

[0012] A warning plate is rotatably connected to the top of the sealing cylinder on the side corresponding to the sealing plate, and an elastic telescopic rope is installed on the top of the end of the warning plate away from the air duct. The end of the elastic telescopic rope away from the warning plate passes through the sealing cylinder and is fixed to the top of the sealing plate.

[0013] Furthermore, multiple electric actuators have the same base at their bottom ends, a servo motor is mounted on the top of the base, and a fixing sleeve is fitted around the servo motor, with the bottom end of the fixing sleeve fixed to the top of the base.

[0014] The fixed cylinder has multiple heat dissipation holes arranged in a ring array on its exterior for air convection to dissipate heat.

[0015] Furthermore, a threaded rod is installed on the top of the fixed cylinder via a bearing, and a movable seat is externally threaded to the bottom end of the threaded rod. The movable seat is located at the bottom of multiple electric push rods, and the bottom end of the electric push rod is fixed together with the top of the movable seat.

[0016] The output shaft of the servo motor passes through the fixed cylinder and is fixed to the bottom end of the threaded rod.

[0017] Furthermore, the top of the movable seat is equipped with multiple spaced-apart limiting posts, the top of which is fixed to the bottom of the support plate.

[0018] Furthermore, a positioning post is provided between each pair of adjacent electric push rods. A positioning plate for supporting the support plate is installed at the top of the positioning post, and the bottom end of the positioning post passes through the movable seat and the fixed cylinder in sequence and is fixed together with the top of the base.

[0019] Furthermore, a dustproof net is installed inside the top of the duct, and the dustproof net is located on top of the fan.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. The dust concentration is detected by a laser dust sensor, and then the fan is started to deliver outside air into the encapsulation cylinder through the air duct. The dust is blown away and discharged through the air hole. At the same time, the fan drives the linkage shaft to rotate the inner and outer cleaning soft brushes on the mounting plate, so as to disperse the dust on the outside of the noise detector and the inner wall of the encapsulation cylinder. The rotation of the inner and outer cleaning soft brushes can improve the air circulation efficiency in the encapsulation cylinder, thereby improving the cleaning efficiency and cleaning effect of the dust in the encapsulation cylinder, and avoiding the impact of dust adhesion on the performance of the noise detector.

[0022] 2. By connecting the elastic connecting rope to the sealing plate, the sealing plate can be lowered with the electric push rod, and the elastic connecting rope can be stretched to pull the warning plate outward. This allows the warning plate to alert and inform surrounding personnel that the noise detector is in working condition, thereby avoiding additional noise interference around the noise detector and improving the detection accuracy of the noise detector.

[0023] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the warning panel after adjustment according to this utility model;

[0026] Figure 3 This is a cross-sectional view of the packaging cylinder of this utility model;

[0027] Figure 4 This is a cross-sectional view of the support plate of this utility model;

[0028] Figure 5 This is a schematic diagram of the support plate after adjustment according to the present invention;

[0029] Figure 6This is a cross-sectional view of the air vent of this utility model.

[0030] In the diagram: 1. Support plate; 2. Encapsulation cylinder; 3. Noise detector; 4. Air duct; 5. Fan; 6. Linkage shaft; 7. Mounting plate; 8. Inner cleaning soft brush; 9. Outer cleaning soft brush; 10. Laser dust sensor; 11. Air vent; 12. Sealing plate; 13. Through hole; 14. Connecting seat; 15. Electric push rod; 16. Warning plate; 17. Elastic telescopic rope; 18. Base; 19. Servo motor; 20. Fixed cylinder; 21. Heat dissipation hole; 22. Threaded rod; 23. Moving seat; 24. Limiting post; 25. Positioning post; 26. Positioning plate; 27. Dustproof net. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0036] Please see Figure 1-6 This utility model provides a technical solution: a noise monitoring device for environmental monitoring, including a support plate 1, a sealing cylinder 2 installed on the top of the support plate 1, a noise detector 3 (model BSWA308) for environmental monitoring is provided inside the sealing cylinder 2, and a dust removal component for cleaning the noise detector 3 is provided inside the sealing cylinder 2.

[0037] The dust removal component includes a duct 4 fixedly connected to the top of the encapsulation cylinder 2. A fan 5 (model D1225C12B4AZ-00) is installed inside the duct 4. A linkage shaft 6 is installed at the bottom of the output shaft of the fan 5. Mounting plates 7 are installed on both sides of the bottom of the linkage shaft 6. An inner cleaning soft brush 8 and an outer cleaning soft brush 9 are installed at the bottom of both ends of the mounting plates 7. The inner cleaning soft brush 8 is used to clean the outside of the noise detector 3, and the outer cleaning soft brush 9 is used to clean the inner wall of the encapsulation cylinder 2. Two laser dust sensors 10 (model PM2012) for detecting dust concentration are installed at the top of the inner cavity of the encapsulation cylinder 2, and a warning device for reducing noise interference is installed on the outside of the encapsulation cylinder 2.

[0038] In use, the operator activates the laser dust sensor 10. The laser dust sensor 10 uses a laser to irradiate dust particles in the air, causing the particles to scatter light. Simultaneously, the laser dust sensor 10 uses an algorithm based on Mie's theory to determine the equivalent particle size and the number of particles of different sizes per unit volume. Therefore, by detecting the intensity and quantity of scattered light, the dust concentration can be calculated, achieving accurate measurement of airborne dust concentration. When the dust concentration exceeds a set value, the operator then activates the fan 5 to deliver outside air through the duct 4 into the encapsulation cylinder 2, which can then... Dust inside the 2 is discharged through the air hole 11. To improve the cleaning effect of dust, the linkage shaft 6 is connected to the fan 5, so that the linkage shaft 6 can drive the inner cleaning soft brush 8 and the outer cleaning soft brush 9 on the mounting plate 7 to scrape and clean the outside of the noise detector 3 and the inner wall of the encapsulation cylinder 2. This can disperse the dust and make it easier to blow away from the encapsulation cylinder 2. The rotation of the inner cleaning soft brush 8 and the outer cleaning soft brush 9 can improve the air circulation efficiency inside the encapsulation cylinder 2, thereby improving the cleaning efficiency and cleaning effect of dust inside the encapsulation cylinder 2, and avoiding the impact of dust adhesion on the performance of the noise detector 3.

[0039] After cleaning, the noise detector 3 in this application obtains noise information in the environment by measuring the intensity, frequency and time distribution of sound. With the assistance of the aforementioned dust removal components, it can effectively avoid dust adhesion that affects the accuracy of sound acquisition. Compared with the prior art, this application can effectively improve the noise detection efficiency of the noise detector 3.

[0040] In this embodiment: the outer side of the encapsulation cylinder 2 is provided with a plurality of air holes 11 arranged in a ring array. Each air hole 11 is provided with a sealing plate 12 inside. The top of the support plate 1 is provided with a through hole 13 on one side corresponding to the sealing plate 12. The bottom end of the sealing plate 12 extends to the bottom of the through hole 13. A connecting seat 14 is installed at the bottom end of the sealing plate 12. An electric push rod 15 (the electric push rod model 15 is ANT-26) is installed at the bottom end of the connecting seat 14.

[0041] Since the connecting seat 14 is used to connect the electric push rod 15 and the sealing plate 12, the electric push rod 15 drives the sealing plate 12 to move up and down through the connecting seat 14. At the same time, the electric push rod 15 is installed on the movable seat 13 on the threaded rod 22, so that the sealing plate 12 can always be inside the air hole 11 to shield the noise detector 3. Therefore, in use, by starting the electric push rod 15 to drive the sealing plate 12 to move up and down, when the sealing plate 12 moves down and is misaligned with the air hole 11, the sealing cylinder 2 communicates with the outside through the air hole 11, which facilitates the noise detector 3 to monitor the environment and also facilitates the discharge of dust when cleaning. When the sealing plate 12 moves up and is embedded inside the air hole 11, the sealing plate 12 seals the air hole 11, achieving the effect of storing and protecting the noise detector 3.

[0042] To improve the accuracy of the detection data, staff can operate a single electric push rod 15 to move the sealing plate 12 downward, so that the sealing cylinder 2 exposes only one air hole 11, thus enabling precise monitoring of sound in a certain direction.

[0043] In this embodiment: a warning plate 16 is rotatably connected to the top of the encapsulation cylinder 2 on the side corresponding to the sealing plate 12, and an elastic telescopic rope 17 is installed on the top of the end of the warning plate 16 away from the air duct 4. The end of the elastic telescopic rope 17 away from the warning plate 16 passes through the encapsulation cylinder 2 and is fixed together with the top of the sealing plate 12.

[0044] By connecting the elastic connecting rope to the sealing plate 12, when the sealing plate 12 moves down with the retraction of the electric push rod 15, the sealing plate 12 can pull the elastic connecting rope, and the elastic connecting rope can pull the warning plate 16 to flip outward, so that the warning plate 16 can inform the surrounding personnel that the noise detector 3 is in working condition, thereby avoiding additional noise interference around the noise detector 3 and improving the detection accuracy of the noise detector 3.

[0045] When the noise detector 3 finishes monitoring, the sealing plate 12 moves upward and embeds itself inside the air hole 11. At the same time, the warning plate 16 flips inward to the top of the encapsulation cylinder 2 by its own gravity.

[0046] In this embodiment: the bottom ends of multiple electric push rods 15 are provided with the same base 18, and a servo motor 19 (model SGM7J-C2A7A6S) is installed on the top of the base 18. A fixing cylinder 20 is sleeved on the outside of the servo motor 19, and the bottom end of the fixing cylinder 20 is fixed together with the top of the base 18. Multiple heat dissipation holes 21 are provided on the outside of the fixing cylinder 20 in a ring array for air convection to dissipate heat.

[0047] The servo motor 19 is supported by the base 18 and protected by the fixed cylinder 20 to prevent damage to the servo motor 19 from collisions and impacts, thus ensuring the performance of the servo motor 19. By opening multiple heat dissipation holes 21 on the outside of the fixed cylinder 20, the fixed cylinder 20 can be connected to the outside, which facilitates the flow of air inside the fixed cylinder 20 and prevents the heat of the servo motor 19 from accumulating and being unable to dissipate, thereby ensuring the operational stability of the servo motor 19 and preventing accidents such as overload.

[0048] In this embodiment: a threaded rod 22 is installed on the top of the fixed cylinder 20 through a bearing, and a movable seat 23 is externally threaded to the bottom end of the threaded rod 22. The movable seat 23 is located at the bottom of a plurality of electric push rods 15, and the bottom end of the electric push rod 15 is fixed together with the top of the movable seat 23.

[0049] The output shaft of the servo motor 19 passes through the fixed cylinder 20 and is fixed together with the bottom end of the threaded rod 22.

[0050] The threaded rod 22 is supported and fixed by the fixed cylinder 20. The servo motor 19 output shaft is connected to the threaded rod 22, so that the servo motor 19 can drive the threaded rod 22 to rotate. The threaded rod 22 then drives the threaded movable seat 23 to move up and down. The movable seat 23 simultaneously drives the electric push rod 15 and the encapsulation cylinder 2 to move up and down, thereby achieving the effect of adjusting the height of the noise detector 3 and improving the detection accuracy of the noise detector 3.

[0051] In this embodiment: a plurality of spaced limiting posts 24 are installed on the top of the movable seat 23, and the top of the limiting posts 24 are fixed together with the bottom of the support plate 1.

[0052] By connecting the limiting post 24 to the support plate 1, when the moving seat 23 lifts the limiting post 24, the limiting post 24 can simultaneously drive the encapsulation cylinder 2 on the support plate 1 to move, thereby achieving the effect of adjusting the height of the noise detector 3.

[0053] In this embodiment: a positioning post 25 is provided between each two adjacent electric push rods 15. A positioning plate 26 for supporting the support plate 1 is installed at the top of the positioning post 25. The bottom end of the positioning post 25 passes through the movable seat 23 and the fixed cylinder 20 in sequence and is fixed together with the top of the base 18.

[0054] The sliding connection between the positioning post 25 and the movable seat 23 allows the positioning post 25 to limit the displacement of the movable seat 23, preventing the movable seat 23 from tilting during displacement and thus ensuring the stability of the encapsulation cylinder 2 during displacement.

[0055] In this embodiment: a dustproof net 27 is installed inside the top of the air duct 4, and the dustproof net 27 is located on the top of the fan 5.

[0056] The dustproof net 27 installed on the top of the fan 5 can block dust and other impurities, preventing them from entering the inside of the sealing cylinder 2 and causing contamination, thus ensuring the cleanliness of the inside of the sealing cylinder 2.

[0057] Working principle:

[0058] In use, the staff moves the packaging cylinder 2 to a suitable position using the base 18. Then, the staff operates the background control system to start the servo motor 19. The servo motor 19 drives the threaded rod 22 to rotate. The threaded rod 22 drives the moving seat 23, which is limited by the positioning post 25, to move upward. The moving seat 23 then drives the sealing plate 12 and the packaging cylinder 2 to move upward via the electric push rod 15 and the limiting post 24. This achieves the effect of adjusting the height of the noise detector 3 and improving the monitoring effect of the noise detector 3.

[0059] After the height adjustment is completed, the staff operates the electric push rod 15 through the background control system to move the sealing plate 12 up and down. When the sealing plate 12 moves down and is misaligned with the air hole 11, the encapsulation cylinder 2 connects to the outside through the air hole 11, which facilitates the noise detector 3 to monitor the environment. At the same time, a single electric push rod 15 can be operated to move the sealing plate 12 down, so that the encapsulation cylinder 2 only exposes one air hole 11, so as to achieve accurate monitoring of sound in a certain direction.

[0060] Meanwhile, to prevent excessive dust and other impurities from adhering to the outside of the noise detector 3 and affecting the accuracy of the detection, the staff activates the laser dust sensor 10. The laser dust sensor 10 uses a laser to irradiate dust particles in the air, causing the particles to scatter light. The dust concentration is calculated by detecting the intensity and quantity of the scattered light. When the dust concentration exceeds the set value, the background control system starts the fan 5 to deliver external air through the air duct 4 to the inside of the encapsulation cylinder 2, which can discharge the dust inside the encapsulation cylinder 2 through the air hole 11. In order to improve the cleaning effect of dust, the linkage shaft 6 is connected to the fan 5, so that the linkage shaft 6 can drive the inner cleaning soft brush 8 and the outer cleaning soft brush 9 on the mounting plate 7 to scrape and clean the outside of the noise detector 3 and the inner wall of the encapsulation cylinder 2. This can disperse the dust and make it easier to blow away from the encapsulation cylinder 2. The rotation of the inner cleaning soft brush 8 and the outer cleaning soft brush 9 can improve the air circulation efficiency inside the encapsulation cylinder 2, thereby improving the cleaning efficiency and cleaning effect of the dust inside the encapsulation cylinder 2 and preventing the performance of the noise detector 3 from being affected by dust adhesion.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A noise monitoring device for environmental monitoring, comprising a support plate (1), characterized in that: The top of the support plate (1) is equipped with a sealing cylinder (2), and the sealing cylinder (2) is equipped with a noise detector (3) for environmental monitoring, and the sealing cylinder (2) is equipped with a dust removal component for cleaning the noise detector (3). The dust removal component includes a duct (4) fixedly connected to the top of the encapsulation cylinder (2), a fan (5) is installed inside the duct (4), a linkage shaft (6) is installed at the bottom of the output shaft of the fan (5), and mounting plates (7) are installed on both sides of the bottom of the linkage shaft (6). An inner cleaning soft brush (8) and an outer cleaning soft brush (9) are installed at the bottom of both ends of the mounting plate (7). The inner cleaning soft brush (8) is used to clean the outside of the noise detector (3), and the outer cleaning soft brush (9) is used to clean the inner wall of the encapsulation cylinder (2). Two laser dust sensors (10) for detecting dust concentration are installed on the top of the inner cavity of the encapsulation cylinder (2), and warning devices for reducing noise interference are installed on the outside of the encapsulation cylinder (2).

2. The noise monitoring device for environmental monitoring according to claim 1, characterized in that: The warning device includes multiple air holes (11) arranged in a ring array outside the encapsulation cylinder (2). Each air hole (11) is provided with a sealing plate (12). A through hole (13) is provided on the top of the support plate (1) on one side corresponding to the sealing plate (12). The bottom end of the sealing plate (12) extends to the bottom of the through hole (13). A connecting seat (14) is installed at the bottom end of the sealing plate (12). An electric push rod (15) is installed at the bottom end of the connecting seat (14). A warning plate (16) is rotatably connected to the top of the encapsulation cylinder (2) on the side corresponding to the sealing plate (12). An elastic telescopic rope (17) is installed on the top of the end of the warning plate (16) away from the air duct (4). The end of the elastic telescopic rope (17) away from the warning plate (16) passes through the encapsulation cylinder (2) and is fixed together with the top of the sealing plate (12).

3. The noise monitoring device for environmental monitoring according to claim 2, characterized in that: Multiple electric push rods (15) are provided with the same base (18) at their bottom ends. A servo motor (19) is installed on the top of the base (18), and a fixing cylinder (20) is sleeved on the outside of the servo motor (19). The bottom end of the fixing cylinder (20) is fixed together with the top of the base (18). The fixed cylinder (20) has multiple heat dissipation holes (21) arranged in a ring array on the outside for air convection to dissipate heat.

4. The noise monitoring device for environmental monitoring according to claim 3, characterized in that: The top of the fixed cylinder (20) is equipped with a threaded rod (22) that is movably connected by a bearing, and the bottom end of the threaded rod (22) is externally threaded with a movable seat (23). The movable seat (23) is located at the bottom of multiple electric push rods (15), and the bottom end of the electric push rod (15) is fixed together with the top of the movable seat (23). The output shaft of the servo motor (19) passes through the fixed cylinder (20) and is fixed together with the bottom end of the threaded rod (22).

5. The noise monitoring device for environmental monitoring according to claim 4, characterized in that: The top of the movable seat (23) is equipped with a plurality of spaced limiting posts (24), the top of the limiting posts (24) being fixed together with the bottom of the support plate (1).

6. The noise monitoring device for environmental monitoring according to claim 3, characterized in that: A positioning post (25) is provided between each pair of adjacent electric push rods (15). A positioning plate (26) for supporting the support plate (1) is installed at the top of the positioning post (25). The bottom end of the positioning post (25) passes through the movable seat (23) and the fixed cylinder (20) in sequence and is fixed together with the top of the base (18).

7. The noise monitoring device for environmental monitoring according to claim 1, characterized in that: The top of the air duct (4) is equipped with a dustproof net (27), and the dustproof net (27) is located on the top of the fan (5).

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