An on-line infrared moisture detection device and method for material production

Abstract

This invention belongs to the field of material moisture detection technology, specifically an online infrared moisture detection device and method for material production. It includes a connecting rod with an infrared detection head fixedly connected to its side. By continuously blowing air onto a protective cover to form an air curtain, it actively removes surrounding dust and foreign objects. Finally, a pneumatic circuit is periodically activated to push a rubber scraper across the surface of the protective cover, physically scraping away attached contaminants. This invention dynamically and actively maintains the cleanliness of the infrared detection head by combining air curtain isolation with automatic scraping, fundamentally solving the problems of easy probe contamination and difficult maintenance in traditional methods. It effectively prevents dust and foreign objects from forming a physical barrier and interference layer on the detection mirror surface, avoiding measurement signal distortion and reading drift caused by abnormal scattering, absorption, and reflection of infrared light, thus ensuring long-term accuracy, stability, and reliability of moisture detection results.

Description

Technical Field

[0001] This invention belongs to the field of material moisture detection technology, specifically an online infrared moisture detection device and method for material production. Background Technology

[0002] In continuous material production, moisture content is a key parameter that directly affects product quality, processing efficiency, energy consumption, and storage stability. Therefore, during material production, processing personnel use online infrared moisture detection devices to detect the moisture content of the materials. Based on the characteristic absorption principle of water molecules in a specific infrared band, online infrared moisture detection devices measure the infrared spectral signals reflected or transmitted by the material, enabling instantaneous and continuous determination of its moisture content during material transportation. This provides the possibility for timely adjustment of process parameters such as drying, granulation, and mixing, and is a key online analysis equipment for achieving production automation and stable product quality.

[0003] In existing online infrared moisture detection devices for material production, dust and foreign objects easily adhere to the detection mirror surface of the detection probe. Dust and foreign objects form a physical barrier and interference layer on the surface of the detection probe, which causes abnormal scattering or absorption of the incident infrared light. At the same time, the signal reflected back from the material surface is severely attenuated or mixed with noise, resulting in distortion of the detection signal. The direct consequence is a significant drift in the measurement reading, usually manifested as a false increase or drastic fluctuation in the moisture detection value, ultimately leading to completely inaccurate measurement results.

[0004] Therefore, the present invention provides an online infrared moisture detection device and method for material production. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the online infrared moisture detection device for material production of the present invention includes a connecting rod, and an infrared detection head is fixedly connected to the side end of the connecting rod; A connecting ring is fixedly sleeved on the outer side of the connecting rod. A circular groove is opened on the side of the connecting ring. A filter plate is movably inserted into the circular groove. A pair of symmetrically distributed mounting rings are fixedly connected to the outer side of the connecting ring. A spring is fixedly connected to the inner wall of the mounting ring. A limit block is fixedly connected to the side end of the spring. The limit block is used to fix the filter plate. A pair of limit grooves adapted to the limit block are opened on the filter plate. In the initial state, the end of the limit block away from the spring passes through the connecting ring and is inserted into the limit groove. The sleeve ring is equipped with an air pump and a controller. An air inlet groove is provided on the inner wall of the annular groove. The air inlet groove is equipped with a controller and a switch valve. The side end of the connecting rod is fitted with a protective cover, which is used to protect the infrared detection head. The inner wall of the protective cover is coated with a magnetic coating first, and the outer side of the connecting rod is coated with a magnetic coating second that is magnetically connected to the magnetic coating first. A connecting frame is fixedly connected to the side of the sleeve ring, and a sleeve tube is fixedly connected to the inner wall of the connecting frame. A controller and a switch valve are provided on the connecting frame. The interior of the connecting frame is a hollow structure. A round rod is movably inserted into the inside of the sleeve tube. A rectangular block is fixedly connected to the end of the round rod away from the sleeve tube. A rubber scraper is fixedly connected to the side of the rectangular block. The side of the rubber scraper away from the rectangular block is on the same horizontal plane as the side of the protective cover.

[0007] Preferably, a number of symmetrically distributed sliders are fixedly connected to the outer side of the round rod, and a number of sliding grooves adapted to the sliders are opened on the inner wall of the sleeve tube.

[0008] Preferably, a sealing groove is provided on the inner wall of the sleeve, and a sealing ring is fixedly connected inside the sealing groove. The inner wall of the sealing ring is tightly fitted to the outer side of the round rod.

[0009] Preferably, the outer side of the connecting rod is rotatably connected to a fixed frame via a pair of rotating shafts, the bottom of the connecting rod is fixedly connected to a lifting rod, the outer side of the lifting rod is movably fitted with a sleeve, the sleeve is equipped with an air pump and a controller, and there is a gap between the top of the connecting rod and the inner top wall of the fixed frame.

[0010] Preferably, a fixing groove is provided on the inner wall of the sleeve, and a sealing ring is fixedly connected inside the fixing groove. The inner wall of the sealing ring is tightly fitted to the outer side of the lifting rod.

[0011] Preferably, a base is placed against the bottom of the socket, a pair of adjustment slots are provided on the top of the base, and adjustment blocks that are adapted to the adjustment slots are fixedly connected to the bottom of both the socket and the fixing frame. An air intake hose is fixedly connected to the outer side of the sleeve near the bottom end. A fixing pipe is fixedly connected to the inner wall of the adjusting groove below the sleeve. An adjusting rod is movably inserted inside the fixing pipe. The side end of the adjusting rod is fixedly connected to the adjusting block located below the sleeve. The end of the air intake hose away from the sleeve is fixedly connected to the top of the fixing pipe. A switch valve and a controller are provided on the air intake hose.

[0012] Preferably, a reinforcing groove is provided on each of the two inner sidewalls of the adjusting groove, and a reinforcing block that matches the reinforcing groove is fixedly connected to each of the two sidewalls of the adjusting block.

[0013] Preferably, a sleeve cover is fitted to the top of the base, and the side of the sleeve cover abuts against the outer side of the sleeve.

[0014] Preferably, each of the four corners of the bottom of the socket cover is fixedly connected to a plug block, the base is provided with a plug groove that matches the plug block, the inner wall of the plug groove is coated with a magnetic coating layer three, and the outer side of the plug block is coated with a magnetic coating layer four that is magnetically attracted to the magnetic coating layer three.

[0015] A method for online infrared moisture detection in material production, the method employing the aforementioned online infrared moisture detection device for material production, includes the following steps: S1: The moisture content of the material is detected by an infrared detector, and a protective cover is used to protect it from dust. S2: Blow air from the socket ring toward the infrared detection head so that dust and foreign objects are less likely to come into contact with the surface of the protective cover. S3: Periodically move the rubber scraper on the protective cover to scrape away dust and foreign objects attached to it; S4: Move the lifting rod up and down to adjust the angle of the infrared detection head in the vertical direction, so that it can detect materials from multiple angles; S5: Move the adjusting rod horizontally to push the sleeve and infrared detection head to obtain the cross-sectional moisture distribution curve, rather than single-point data.

[0016] The beneficial effects of this invention are as follows: 1. The present invention discloses an online infrared moisture detection device and method for material production. A filter plate is quickly installed using a spring-limiting mechanism, and a protective cover is installed on the infrared detection head using magnetic fasteners. Air is then continuously blown onto the protective cover to form an air curtain, actively removing surrounding dust and foreign objects. Finally, a pneumatic circuit is periodically activated to push a rubber scraper across the surface of the protective cover, physically scraping away attached contaminants. This invention, through a combination of air curtain isolation and automatic scraping, dynamically and actively maintains the cleanliness of the infrared detection head, fundamentally solving the problems of easy probe contamination and difficult maintenance in traditional methods. It effectively prevents dust and foreign objects from forming physical barriers and interference layers on the detection mirror surface, avoiding measurement signal distortion and reading drift caused by abnormal scattering, absorption, and reflection of infrared light, thereby ensuring long-term accuracy, stability, and reliability of moisture detection results.

[0017] 2. The online infrared moisture detection device and method for material production described in this invention involves opening the switch valve on the air inlet hose to allow a portion of gas to enter the air inlet hose from the sleeve. The gas then flows from the air inlet hose into the fixed pipe. As the amount of gas in the fixed pipe increases, the gas thrust causes the adjusting rod to move outwards from the fixed pipe. This causes the adjusting block to move the sleeve and all its mechanisms horizontally on the base, allowing the infrared detection head to continuously and horizontally detect the material, thus obtaining a cross-sectional moisture distribution curve instead of single-point data, greatly improving the reliability and accuracy of the detection results. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the disassembled socket in this invention; Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the image; Figure 4 This is a schematic diagram of the interior of the protective cover in this invention; Figure 5 This is a schematic diagram of the movement of the rubber scraper block in this invention; Figure 6 This is a schematic diagram of the internal structure of the sleeve in this invention; Figure 7 This is a partial schematic diagram of the sleeve in this invention; Figure 8 This is a schematic diagram of the base in this invention; Figure 9 This is the present invention. Figure 8 Enlarged view of point B in the image; Figure 10 This is a schematic diagram of the sleeve cover in this invention; Figure 11 This is a schematic diagram of the method flow of the present invention; Figure 12 This is a schematic diagram of the light source portion of the present invention; Figure 13 This is a schematic diagram of the reflected light of the present invention; Figure 14 This is a schematic diagram of the filtering part of the present invention; Figure 15 This is a schematic diagram of the measurement part of the present invention.

[0020] In the diagram: 1. Connecting rod; 2. Infrared detection head; 3. Sleeve ring; 4. Circular groove; 5. Filter plate; 6. Mounting ring; 7. Spring; 8. Limiting block; 9. Limiting groove; 10. Air inlet groove; 11. Protective cover; 12. Magnetic coating one; 13. Magnetic coating two; 14. Connecting frame; 15. Sleeve tube; 16. Round rod; 17. Rectangular block; 18. Rubber scraper block; 19. Slider; 20. Slide groove; 21. Sealing ring; 22. Rotating shaft; 23. Fixing frame; 24. Sleeve cylinder; 25. Sealing circular ring; 26. Base; 27. Adjusting groove; 28. Adjusting block; 29. ​​Air inlet hose; 30. Fixing pipe; 31. Adjusting rod; 32. Reinforcing groove; 33. Reinforcing block; 34. Sleeve cover; 35. Insertion block; 36. Insertion groove; 37. Magnetic coating three; 38. Magnetic coating four; 39. Lifting rod. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figure 1-7 and Figure 12-15 As shown in the embodiment of the present invention, an online infrared moisture detection device for material production includes a connecting rod 1, and an infrared detection head 2 is fixedly connected to the side end of the connecting rod 1. The infrared detector head 2 includes a light source, a filter, and a measurement section. The light source is combined with... Figure 12 As shown, the circled area represents the light source. Figure 12 The leftmost component is an infrared light source (tungsten filament lamp), the middle component is a motor for beam splitting / selecting light (light of a specific wavelength), and the right component is a lens and a bifocal ellipsoidal reflector for efficient light guiding. When light hits the tilted beam splitter, some of the light passes through the beam splitter and reaches the concave mirror on the right. The concave mirror reflects the light and then hits the beam splitter again, reflecting it upwards onto the detection device. The light rays from the beam splitter pass through the lens and hit the object being detected. The object reflects some of the light back to the beam splitter and also onto the detection device. By comparing the two sets of light rays, the moisture content on the object can be detected. Filtering components combined Figure 14 As shown, it consists of a filter disc equipped with three bandpass optical filters with wavelengths of 1815nm, 1935nm, and 2120nm, selected for the absorption band of water. The filter disc is mounted on a brushless DC motor, which can quickly and accurately switch between different wavelengths to ensure fast and continuous sampling. The rightmost device in the optical path is a convex lens used to collimate the light, thereby forming a stable and parallel beam and guiding it to the sample. Measurement section such as Figure 15As shown, the light coming from the right is split by a 10% / 90% beam splitter. 10% of the beam is sent to a reference photodiode for baseline correction, while 90% of the beam is reflected back to the sample for measurement. A stepper motor controls the beam splitter to rotate 90° via a drive shaft to achieve internal beam correction. Then, the reference light shines on the sensor, and the light reflected back from the object being measured also shines on the sensor. By comparing the two, the water content of the object being measured can be calculated.

[0023] A connecting ring 3 is fixedly sleeved on the outer side of the connecting rod 1. A circular groove 4 is opened on the side of the connecting ring 3. A filter plate 5 is movably inserted into the circular groove 4. A pair of symmetrically distributed mounting rings 6 are fixedly connected to the outer side of the connecting ring 3. A spring 7 is fixedly connected to the inner wall of the mounting ring 6. A limiting block 8 is fixedly connected to the side end of the spring 7. The limiting block 8 is used to fix the filter plate 5. A pair of limiting grooves 9 adapted to the limiting block 8 are opened on the filter plate 5. In the initial state, the end of the limiting block 8 away from the spring 7 passes through the connecting ring 3 and is inserted into the limiting groove 9. The sleeve ring 3 is equipped with an air pump and a controller. The inner wall of the annular groove 4 is provided with an air inlet groove 10, and the air inlet groove 10 is equipped with a controller and a switch valve. The side end of the connecting rod 1 is fitted with a protective cover 11, which is made of transparent material. The protective cover 11 is used to protect the infrared detection head 2. The inner wall of the protective cover 11 is coated with a magnetic coating 12, and the outer side of the connecting rod 1 is coated with a magnetic coating 13 that is magnetically connected to the magnetic coating 12. The side of the connecting ring 3 is fixedly connected to the connecting frame 14, and the inner wall of the connecting frame 14 is fixedly connected to the sleeve pipe 15. The connecting frame 14 is equipped with a controller and a switch valve. The interior of the connecting frame 14 is a hollow structure. A round rod 16 is movably inserted into the inside of the sleeve pipe 15. A rectangular block 17 is fixedly connected to the end of the round rod 16 away from the sleeve pipe 15. A rubber scraper 18 is fixedly connected to the side of the rectangular block 17. The side of the rubber scraper 18 away from the rectangular block 17 is on the same horizontal plane as the side of the protective cover 11.

[0024] In the existing technology, when the existing online infrared moisture detection device for material production is in use, dust and foreign objects are easily attached to the detection mirror surface of its detection probe. Dust and foreign objects will form a physical barrier and interference layer on the surface of the detection probe, which will cause the incident infrared light to be abnormally scattered or absorbed. At the same time, the signal reflected back from the material surface will be severely attenuated or mixed with noise, resulting in distortion of the detection signal. The direct consequence is that the measurement reading will drift significantly, usually manifested as a false increase or violent fluctuation in the moisture detection value, ultimately leading to completely inaccurate measurement results. The present invention is used in the following steps: Step 1: Installation. Manually move the limiting block 8 to compress the spring 7, then insert the filter plate 5 into the annular groove 4. After insertion, remove the external force applied to the limiting block 8, causing the spring 7 to push the limiting block 8 toward the filter plate 5 until the end of the limiting block 8 away from the spring 7 is inserted into the limiting groove 9. The limiting block 8 is used to limit the filter plate 5 and fix it in the annular groove 4. When the limiting block 8 enters the limiting groove 9, the spring 7 is still in a contracted state, so the spring 7 will continue to apply force to the limiting block 8, improving the stability of one end of the limiting block 8 in the limiting groove 9. Then, the protective cover 11 is fitted onto the side end of the connecting rod 1 to cover the infrared detection head 2. The protective cover 11 is used to protect the infrared detection head 2 from dust. At the same time, the magnetic coating 12 and the magnetic coating 13 are magnetically connected together to improve the stability of the protective cover 11 on the connecting rod 1. Step 2: When using infrared detector 2 to detect the moisture content of the material, the air pump 1 needs to be started so that its outlet end injects gas into the air inlet groove 10 and the annular groove 4. Then the gas will be sprayed from the filter plate 5 to the protective cover 11, thereby blowing away the dust and foreign objects around the protective cover 11 away from the protective cover 11, so that the dust and foreign objects are not easy to adhere to the protective cover 11. Step 3: Periodically open the switch valve on the connecting frame 14 to allow some gas to enter the connecting frame 14 and the sleeve pipe 15. Then, under the action of gas thrust, the round rod 16 will drive the rectangular block 17 and the rubber scraper 18 to move together towards the side closer to the protective cover 11. This allows the rubber scraper 18 to move on the protective cover 11, using the rubber scraper 18 to scrape away the dust and foreign objects attached to the protective cover 11, further improving the cleanliness of the protective cover 11.

[0025] In summary, by using the spring 7 limiting mechanism to quickly install the filter plate 5 and the magnetic buckle to install the protective cover 11 on the infrared detection head 2, and then continuously blowing air into the protective cover 11 to form an air curtain, actively driving away the surrounding dust and foreign objects, and finally periodically activating the pneumatic circuit to push the rubber scraper 18 to move on the surface of the protective cover 11 to remove the attached contaminants by physical scraping, this invention dynamically and actively maintains the cleanliness of the infrared detection head 2 by combining air curtain isolation and automatic scraping. This fundamentally solves the pain points of probe contamination and maintenance difficulties in traditional methods, effectively preventing dust and foreign objects from forming a physical barrier and interference layer on the detection mirror surface, avoiding measurement signal distortion and reading drift caused by abnormal scattering, absorption and reflection of infrared light signal attenuation, thereby ensuring the long-term accuracy, stability and reliability of moisture detection results.

[0026] like Figure 6As shown, a number of symmetrically distributed sliders 19 are fixedly connected to the outer side of the round rod 16. A number of sliding grooves 20 adapted to the sliders 19 are opened on the inner wall of the sleeve tube 15. When the round rod 16 moves in the sleeve tube 15, the sliders 19 will move together with the round rod 16. The sliders 19 can prevent the round rod 16 from rotating during the movement, thereby preventing the rectangular block 17 and the rubber scraper block 18 from rotating.

[0027] like Figure 6 As shown, a sealing groove is provided on the inner wall of the sleeve 15, and a sealing ring 21 is fixedly connected inside the sealing groove. The inner wall of the sealing ring 21 is tightly fitted to the outer side of the round rod 16. The sealing ring 21 can improve the sealing performance between the round rod 16 and the sleeve 15.

[0028] like Figure 1 As shown, the outer side of the connecting rod 1 is rotatably connected to a fixed frame 23 via a pair of rotating shafts 22, the bottom of the connecting rod 1 is fixedly connected to a lifting rod 39, the outer side of the lifting rod 39 is movably fitted with a sleeve 24, the inside of the sleeve 24 is equipped with an air pump and a controller, and there is a gap between the top of the connecting rod 1 and the inner top wall of the fixed frame 23. When in use, the second air pump can be started to fill the sleeve 24 with air. Under the action of the gas thrust, the lifting rod 39 will push one end of the connecting rod 1 upward, while the other end of the connecting rod 1 will rotate downward around the rotating shaft 22, thereby adjusting the angle of the infrared detection head 2, which facilitates the infrared detection head 2 to detect materials from multiple angles.

[0029] like Figure 7 As shown, a fixing groove is provided on the inner wall of the sleeve 24, and a sealing ring 25 is fixedly connected inside the fixing groove. The inner wall of the sealing ring 25 is tightly fitted to the outer side of the lifting rod 39. The sealing ring 25 can improve the sealing between the sleeve 24 and the lifting rod 39, thereby making the sleeve 24 less prone to air leakage.

[0030] Example 2: Figure 8-10 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a base 26 is placed on the bottom of the sleeve 24, a pair of adjustment grooves 27 are provided on the top of the base 26, and adjustment blocks 28 that are adapted to the adjustment grooves 27 are fixedly connected to the bottom of both the sleeve 24 and the fixing frame 23. An air intake hose 29 is fixedly connected to the outer side of the sleeve 24 near the bottom end. A fixing pipe 30 is fixedly connected to the inner wall of the adjusting groove 27 located below the sleeve 24. The air intake hose 29 has a certain length reserved inside the sleeve 24 and the fixing pipe 30. An adjusting rod 31 is movably inserted inside the fixing pipe 30. The side end of the adjusting rod 31 is fixedly connected to the adjusting block 28 located below the sleeve 24. The end of the air intake hose 29 away from the sleeve 24 is fixedly connected to the top of the fixing pipe 30. A switch valve and a controller are provided on the air intake hose 29.

[0031] In use, the switch valve on the air inlet hose 29 is opened, allowing some gas to enter the air inlet hose 29 from the sleeve 24. The gas then enters the fixed tube 30 from the air inlet hose 29. As the amount of gas in the fixed tube 30 increases, the adjusting rod 31 moves outward from the fixed tube 30 under the action of gas thrust. This causes the adjusting block 28 to drive the sleeve 24 and all its mechanisms to move horizontally on the base 26, thereby enabling the infrared detection head 2 to continuously and horizontally detect the item, thus obtaining a cross-sectional moisture distribution curve instead of single-point data, greatly improving the reliability and accuracy of the detection results.

[0032] like Figure 9 As shown, a pair of inner sidewalls of the adjusting groove 27 are provided with reinforcing grooves 32, and a pair of sidewalls of the adjusting block 28 are fixedly connected with reinforcing blocks 33 that are adapted to the reinforcing grooves 32. The reinforcing blocks 33 can prevent the adjusting block 28 from moving upward.

[0033] like Figure 1 As shown, a socket cover 34 is placed on the top of the base 26. The side of the socket cover 34 abuts against the outer side of the socket cylinder 24. The socket cover 34 can protect the air intake hose 29.

[0034] like Figure 10 As shown, each of the four corners of the bottom of the socket cover 34 is fixedly connected to a plug block 35. The base 26 has a plug groove 36 that matches the plug block 35. After the plug block 35 is inserted into the plug groove 36, the stability of the socket cover 34 on the base 26 can be improved. The inner wall of the plug groove 36 is coated with a magnetic coating 37. The outer side of the plug block 35 is coated with a magnetic coating 4 38 that is magnetically attracted to the magnetic coating 37. After the plug block 35 is inserted into the plug groove 36, the magnetic coating 37 and the magnetic coating 4 38 will be magnetically attracted to each other, thereby improving the stability of the plug block 35 in the plug groove 36.

[0035] like Figure 11 As shown, an online infrared moisture detection method for material production is described. This method utilizes the aforementioned online infrared moisture detection device for material production and includes the following steps: S1: The moisture content of the material is detected by infrared detector 2, and dust protection is provided by protective cover 11; S2: Blow air from the ferrule 3 toward the infrared detection head 2 so that dust and foreign objects are less likely to come into contact with the surface of the protective cover 11. S3: Periodically move the rubber scraper 18 on the protective cover 11 to scrape off the dust and foreign matter attached to it; S4: Move the lifting rod 39 up and down to adjust the angle of the infrared detection head 2 in the vertical direction so that it can detect the material from multiple angles; S5: The adjusting rod 31 pushes the sleeve 24 and the infrared detection head 2 to move horizontally to obtain the detection moisture distribution curve of the cross section, rather than single-point data.

[0036] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0037] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting the scope of protection of this invention.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online infrared moisture detection device for material production, comprising a connecting rod (1), characterized in that: An infrared detection head (2) is fixedly connected to the side end of the connecting rod (1); A connecting ring (3) is fixedly sleeved on the outside of the connecting rod (1). A circular groove (4) is opened on the side of the connecting ring (3). A filter plate (5) is movably inserted inside the circular groove (4). A pair of symmetrically distributed mounting rings (6) are fixedly connected to the outside of the connecting ring (3). A spring (7) is fixedly connected to the inner wall of the mounting ring (6). A limiting block (8) is fixedly connected to the side end of the spring (7). The limiting block (8) is used to fix the filter plate (5). A pair of limiting grooves (9) adapted to the limiting block (8) are opened on the filter plate (5). In the initial state, the end of the limiting block (8) away from the spring (7) passes through the connecting ring (3) and is inserted into the limiting groove (9). The sleeve ring (3) is equipped with an air pump and a controller. The inner wall of the annular groove (4) is provided with an air inlet groove (10). The air inlet groove (10) is equipped with a controller and a switch valve. The side end of the connecting rod (1) is fitted with a protective cover (11), which is used to protect the infrared detection head (2). The inner wall of the protective cover (11) is coated with a magnetic coating first (12), and the outer side of the connecting rod (1) is coated with a magnetic coating second (13) that is magnetically connected to the magnetic coating first (12). The side of the sleeve ring (3) is fixedly connected to the connecting frame (14), and the inner wall of the connecting frame (14) is fixedly connected to the sleeve pipe (15). The connecting frame (14) is equipped with a controller and a switch valve. The inside of the connecting frame (14) is a hollow structure. A round rod (16) is movably inserted into the inside of the sleeve pipe (15). A rectangular block (17) is fixedly connected to the end of the round rod (16) away from the sleeve pipe (15). A rubber scraper (18) is fixedly connected to the side of the rectangular block (17). The side of the rubber scraper (18) away from the rectangular block (17) is on the same horizontal plane as the side of the protective cover (11).

2. The online infrared moisture detection device for material production according to claim 1, characterized in that: The outer side of the round rod (16) is fixedly connected with several symmetrically distributed sliders (19), and the inner wall of the sleeve (15) is provided with several grooves (20) that are adapted to the sliders (19).

3. The online infrared moisture detection device for material production according to claim 2, characterized in that: A sealing groove is provided on the inner wall of the sleeve (15), and a sealing ring (21) is fixedly connected inside the sealing groove. The inner wall of the sealing ring (21) is tightly fitted to the outer side of the round rod (16).

4. The online infrared moisture detection device for material production according to claim 1, characterized in that: The outer side of the connecting rod (1) is rotatably connected to a fixed frame (23) via a pair of rotating shafts (22). The bottom of the connecting rod (1) is fixedly connected to a lifting rod (39). A sleeve (24) is movably sleeved on the outer side of the lifting rod (39). An air pump and a controller are installed inside the sleeve (24). There is a gap between the top of the connecting rod (1) and the inner top wall of the fixed frame (23).

5. The online infrared moisture detection device for material production according to claim 4, characterized in that: The inner wall of the sleeve (24) is provided with a fixing groove, and a sealing ring (25) is fixedly connected inside the fixing groove. The inner wall of the sealing ring (25) is tightly fitted to the outer side of the lifting rod (39).

6. The online infrared moisture detection device for material production according to claim 1, characterized in that: The bottom of the sleeve (24) is fitted with a base (26), and the top of the base (26) is provided with a pair of adjustment grooves (27). The bottom of the sleeve (24) and the fixing frame (23) are both fixedly connected with adjustment blocks (28) that are compatible with the adjustment grooves (27). An air inlet hose (29) is fixedly connected to the outer side of the sleeve (24) near the bottom. A fixed pipe (30) is fixedly connected to the inner wall of the adjusting groove (27) below the sleeve (24). An adjusting rod (31) is movably inserted inside the fixed pipe (30). The side end of the adjusting rod (31) is fixedly connected to the adjusting block (28) below the sleeve (24). The end of the air inlet hose (29) away from the sleeve (24) is fixedly connected to the top of the fixed pipe (30). A switch valve and a controller are provided on the air inlet hose (29).

7. The online infrared moisture detection device for material production according to claim 6, characterized in that: The adjusting groove (27) has a pair of inner sidewalls with a reinforcing groove (32), and the adjusting block (28) has a pair of sidewalls with a reinforcing block (33) that is compatible with the reinforcing groove (32).

8. The online infrared moisture detection device for material production according to claim 6, characterized in that: A sleeve cover (34) is placed on the top of the base (26), and the side of the sleeve cover (34) abuts against the outside of the sleeve (24).

9. The online infrared moisture detection device for material production according to claim 8, characterized in that: The four corners of the bottom of the socket cover (34) are fixedly connected with plug blocks (35). The base (26) is provided with plug slots (36) that are compatible with the plug blocks (35). The inner wall of the plug slots (36) is coated with magnetic coating three (37). The outer side of the plug blocks (35) is coated with magnetic coating four (38) that is magnetically connected to magnetic coating three (37).

10. A method for online infrared moisture detection in material production, wherein the method employs the online infrared moisture detection device for material production as described in any one of claims 1-9, characterized in that: Includes the following steps: S1: Use an infrared detector (2) to detect the moisture content of the material and use a protective cover (11) to protect it from dust. S2: Blow air from the sleeve ring (3) toward the infrared detection head (2) so that dust and foreign objects are less likely to come into contact with the surface of the protective cover (11); S3: Periodically move the rubber scraper (18) on the protective cover (11) to scrape off the dust and foreign matter attached to it; S4: Move the lifting rod (39) up and down to adjust the angle of the infrared detection head (2) in the vertical direction so that it can detect the material from multiple angles; S5: Move the adjusting rod (31) to push the sleeve (24) and the infrared detection head (2) horizontally to obtain the detection moisture distribution curve of the cross section, rather than single-point data.

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