A portable wave-absorbing coating thickness measuring device and method

Abstract

The application relates to the field of coating measurement, and relates to a portable wave-absorbing coating thickness measurement device, which comprises a fixing frame, a protective shell capable of protecting important parts is arranged on the upper end surface of the fixing frame, a movable arm capable of being accommodated is slidably arranged on the two sides of the fixing frame, a second track is arranged in the fixing frame, a fan and a wind box are arranged on the upper end surface of the fixing frame, the fan air outlet is fixedly connected with the wind box, an adsorption mechanism capable of adsorbing the coating surface is arranged on the two sides of the movable arm, the upper end surface of the fixing frame is provided with the second track, two groups of first sliding rails are arranged on the inner wall of the movable arm, a movable plate is fixedly connected with the inner wall of the two groups of first sliding rails and abuts against the bottom of the first sliding rail, a pulling mechanism capable of pulling the telescopic rod is fixedly arranged on one side of the fixing frame, a recovery mechanism capable of pulling the telescopic rod back to the original position is fixedly arranged on one side of one group of the movable arms, a detector capable of detecting the thickness of the wave-absorbing coating is fixedly arranged on the bottom of the recovery mechanism.

Description

Technical Field

[0001] This invention relates to the field of coating measurement, specifically to a portable device and method for measuring the thickness of microwave absorbing coatings. Background Technology

[0002] Microwave-absorbing coatings are characterized by high performance, simple processing, convenient construction, and no limitation on target shape, making them one of the most widely used, best-developed, and most effective stealth technologies. The thickness of the microwave-absorbing coating is a crucial process parameter, playing a significant role in product quality, performance, and cost control. Microwave-absorbing coating thickness measurement technology generally employs non-destructive testing methods, allowing measurement of the material's thickness without damaging the coating. However, this process may encounter issues such as difficulty in fixing the coating to the surface, especially when the coating surface is irregular.

[0003] A search revealed prior art publication number CN109458961A, which discloses a portable device and method for measuring the thickness of absorbing coatings. In the test sensor, the inner and outer conductors of the open-circuit end of the open-circuit cavity are gradually alternating to reduce the diameter of the open-circuit port and decrease radiation loss. Simultaneously, the inner conductor of the open-circuit end is shortened to reduce the coupling strength between the cavity energy and the absorbing coating. These improvements effectively increase the loaded quality factor of the open-circuit cavity, ensuring that an effective resonance peak still exists under loading of the high-loss absorbing coating, facilitating the measurement of the high-loss absorbing coating thickness. In terms of the measurement method, based on the characteristic of the absorbing coating's large attenuation of microwave energy, the change in the quality factor of the open-circuit cavity (rather than the resonant frequency) is used to deduce different coating thicknesses. In summary, this invention has the advantages of being applicable to multiple types of absorbing coatings, high testing accuracy, good testing stability, low use and maintenance costs, portability, and convenient operation.

[0004] Therefore, based on the above search and combined with existing methods, when using the above scheme, it is impossible to fix the coating surface during coating detection and it is impossible to measure multiple coating positions, resulting in limitations. In order to solve the problems of not being able to fix the coating surface and not being able to measure multiple coating positions, we propose a portable microwave absorbing coating thickness measurement device and method. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a portable microwave absorbing coating thickness measurement device and method. By using a pulling mechanism and a retrieval mechanism to move the detector to measure multiple positions and by using various suction cups to fix the coating surface, the invention solves the problems of these issues.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A portable microwave absorbing coating thickness measuring device includes a fixed frame, a protective shell on the upper surface of the fixed frame for protecting important parts, retractable rotating arms slidably mounted on both sides of the fixed frame, a second track inside the fixed frame, a fan and an air box on the upper surface of the fixed frame, the air outlet of the fan being fixedly connected to the air box, and adsorption mechanisms for adsorbing the coating surface on both sides of the rotating arms. The second track is opened on the upper surface of the fixed frame.

[0008] The inner wall of the rotating arm is provided with two sets of first slide rails. The inner walls of the two sets of first slide rails are fixedly connected to a moving plate. A telescopic rod is fixedly connected to the lower end face of the moving plate. A mounting block is fixedly connected to the end of the telescopic rod away from the moving plate. The moving plate is slidably connected to the inner wall of the first slide rail and abuts against the bottom of the first slide rail. A pulling mechanism that can pull the telescopic rod is fixedly installed on one side of the fixed frame. A retraction mechanism that can pull the telescopic rod back to its original position is fixedly installed on one side of one set of the rotating arm. A detector that can detect the thickness of the microwave absorbing coating is fixedly installed at the bottom.

[0009] As a further part of this solution, the pulling mechanism includes a cylinder, a piston is slidably connected to the inner wall of the cylinder, a rack is slidably connected to the upper end face of the cylinder, a coil is rotatably connected to the upper end face of the fixed frame, and a second pull rope is fixedly connected to the inner wall of the coil.

[0010] As a further aspect of this solution, the end of the second pull rope away from the reel is fixedly connected to the telescopic rod, the bottom of the reel is provided with a gear, the gear meshes with the rack, and one side of the cylinder is connected to the air box.

[0011] As a further part of this solution, the adsorption mechanism includes a fixed frame, on both sides of which air ducts are fixedly connected. The upper end face of the air duct is connected to the air box. A rotating bar is rotatably connected to the inner wall of the air duct, and two sets of blocking plates are provided on the inner wall of the rotating bar.

[0012] As a further aspect of this solution, the outer surface of the rotating strip is provided with two sets of rotating plates that can seal the inside of the air duct by cooperating with the blocking plates. The outer surface of the rotating plates abuts against the blocking plates. A folded tube is fixedly connected to the bottom of the air duct, and a suction cup is fixedly connected to the end of the folded tube away from the air duct.

[0013] As a further aspect of this solution, the recycling mechanism includes a recycling disc, which is rotatably connected to the upper end face of the rotating arm. A pull rope that can pull a telescopic rod is wound around the inner wall of the recycling disc. The end of the pull rope away from the recycling disc is fixedly connected to the telescopic rod. A reset torsion spring is installed on one side of the recycling disc.

[0014] As a further aspect of this solution, a fixed cover is fixedly connected to the upper end face of the rotating arm, and a retaining ring is installed on one side of the fixed cover. The retaining ring engages with the outer surface of the reset torsion spring, and the side of the fixed cover near the recycling tray abuts against the recycling tray.

[0015] As a further aspect of this solution, a trapezoidal strip is fixedly connected between the first slide rail and the second track. One end of the trapezoidal strip is fixedly connected to the first slide rail, and the other end of the trapezoidal strip is slidably connected to the inner wall of the second track.

[0016] Compared with the prior art, the present invention provides a portable device and method for measuring the thickness of absorbing coatings, which has the following advantages:

[0017] 1. The portable microwave absorbing coating thickness measuring device and method is fixed to the coating surface by suction cup. The operator fixes the fixing frame and rotating arm to the outer surface of the coating. When the outer surface of the coating is irregular or arc-shaped, the fixing frame and rotating arm can be bent and deformed by the connection of the fixing frame and rotating arm, which is convenient for use on coatings of different shapes.

[0018] 2. In this portable microwave absorbing coating thickness measuring device and method, when the suction cup cannot be attracted, the cylinder is drawn in by a fan through a copper tube. At this time, the piston moves, which drives the rack to move. The rack rotates, which drives the coil to rotate. The coil rotates, which pulls the pull rope. The pull rope pulls the telescopic rod to move. The detector is activated to scan the coating and moves along the inner wall of the first slide rail and the second track. It can automatically detect multiple positions. Attached Figure Description

[0019] Figure 1 This is a front view of the three-dimensional structure of the present invention;

[0020] Figure 2 This is a three-dimensional protective shell internal structure diagram of the present invention;

[0021] Figure 3 This is a three-dimensional cross-sectional view of the present invention;

[0022] Figure 4 This is an enlarged view of point A in the three-dimensional representation of the present invention;

[0023] Figure 5 This is a schematic diagram of the position structure of the three-dimensional limiting post of the present invention;

[0024] Figure 6 This is a schematic diagram of the three-dimensional trapezoidal strip structure from another perspective of the present invention;

[0025] Figure 7 This is a schematic diagram of the position structure of the three-dimensional pulley of the present invention;

[0026] Figure 8 This is a schematic diagram of the internal structure of the three-dimensional telescopic rod of the present invention;

[0027] Figure 9 This is a schematic diagram of the three-dimensional pulling mechanism of the present invention;

[0028] Figure 10 This is a schematic diagram of the three-dimensional cylinder position structure of the present invention;

[0029] Figure 11 This is a schematic diagram of the internal structure of the three-dimensional rubber tube of the present invention;

[0030] Figure 12 This is a schematic diagram of the three-dimensional fixing mechanism of the present invention;

[0031] Figure 13 This is a structural diagram of the position of the three-dimensional omnidirectional ball of the present invention;

[0032] Figure 14 This is a schematic diagram of the position structure of the three-dimensional recycling tray of the present invention;

[0033] Figure 15 This is a schematic diagram of the three-dimensional recycling mechanism of the present invention.

[0034] In the diagram: 1. Protective shell; 2. First spring; 3. Suction cup; 4. Fan; 5. Rubber hose; 6. Recycling tray; 7. Fixing frame; 8. Rotating arm; 9. Air box;

[0035] 10. Limiting post; 11. Limiting strip; 12. Trapezoidal strip; 13. First slide rail; 14. Second spring; 15. Folding tube; 16. Blocking plate; 17. Rotating plate;

[0036] 18. Air duct; 19. Rotary bar; 20. Torsion spring; 21. Torsion bar; 22. Universal ball joint; 23. Rack and pinion; 24. Cable reel; 25. Gear;

[0037] 26. Piston; 27. Cylinder; 28. Second rail; 29. ​​Sliding groove; 30. Moving plate; 31. Pulley; 32. Telescopic rod; 33. First pull rope; 34. Copper pipe; 35. Detector; 36. Fixed cover; 37. Third spring; 38. Second pull rope;

[0038] 39. Steel ring; 40. Flat groove; 41. Return torsion spring; 42. Snap ring; 43. Mounting block; 101. Adsorption mechanism; 201. Pulling mechanism; 301. Recycling mechanism. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a portable microwave absorbing coating thickness measurement device and method.

[0041] Example 1: Please refer to Figure 1-8 A portable microwave absorbing coating thickness measuring device is shown, comprising a fixed frame 7, a protective shell 1 on the upper surface of the fixed frame 7, two sets of fixed handles fixedly connected to the upper surface of the protective shell 1, two sets of sliding grooves 29 on both sides of the fixed frame 7, and rotating arms 8 rotatably connected to both sides of the fixed frame 7. A limit post 10 is fixedly connected to one end of the rotating arm 8, the outer surface of the limit post 10 abutting against the inner wall of the sliding groove 29. Two sets of limit strips 11 are fixedly connected to both sides of the rotating arm 8. The operator can easily lift the protective shell 1 using the two sets of fixed handles to measure the thickness of the coating. The protective shell 1 is adjusted to measure the position. After the measurement is completed, the two sets of rotating arms 8 are slid towards the inside of the fixed frame 7. When the rotating arms 8 slide, the limiting strips 11 will slide against the fixed frame 7. The limiting strips 11 on both sides of the rotating arms 8 are installed at the top and bottom. When the two sets of limiting strips 11 abut against the outer surface of the fixed frame 7, the upper and lower limit strips 11 will support and limit the rotating arms 8 to prevent the rotating arms 8 from rotating. When the rotating arms 8 move towards the inside of the fixed frame 7, the limiting post 10 on the rotating arms 8 will slide along the inner wall of the sliding groove 29.

[0042] The fixed frame 7 has a second track 28 inside. The upper end of the fixed frame 7 is fixedly installed with a fan 4 and a fan box 9. The air outlet of the fan 4 is fixedly connected to the fan box 9. Both sides of the rotating arm 8 are equipped with an adsorption mechanism 101 that can adsorb the coating surface. The upper end of the fixed frame 7 has a second track 28. The inner wall of the rotating arm 8 is fixedly installed with two sets of first slide rails 13. The inner wall of the two sets of first slide rails 13 is fixedly connected with a moving plate 30. The lower end of the moving plate 30 is fixedly connected with a telescopic rod 32. The end of the telescopic rod 32 away from the moving plate 30 is fixedly connected with an installation block 43. The telescopic rod 32 is installed with a third spring 37 that can stretch the telescopic rod 32. The moving plate 30 is rotatably connected with two sets of pulleys 31 on both sides. The two sides of the moving plate 30 abut against the inner wall of the first slide rail 13 and the two sides abut against the bottom of the first slide rail 13.

[0043] When the movable plate 30 moves, the pulleys 31 reduce friction inside the first slide rail 13, making the movable plate 30 move more quickly. However, the movable plate 30 may wobble on the inner wall of the first slide rail 13 during movement, causing instability and affecting the measurement results. The third spring 37 drives the telescopic rod 32 to retract, which in turn drives the movable plate 30 to move in the opposite direction. When the movable plate 30 and the pulleys 31 on both sides are tightly in contact with the inner wall and bottom of the first slide rail 13, the movement is stable and does not wobble. A pulling mechanism 201 that can pull the telescopic rod 32 is fixedly installed on one side of the fixed frame 7. A recovery mechanism 301 that can pull the telescopic rod 32 back to its original position is fixedly installed on one side of one set of rotating arms 8. A detector 35 that can detect the thickness of the absorbing coating is fixedly installed at the bottom.

[0044] Example 2: Please refer to Figure 3 , 9 As shown in Figures 10 and 11, the pulling mechanism 201 includes a cylinder 27. A piston 26 is slidably connected to the inner wall of the cylinder 27. A first spring 2 is provided between the piston 26 and the inner wall of the cylinder 27 to reset the piston 26. When the piston 26 moves, the air pressure inside the cylinder 27 may be affected by the external temperature, causing thermal expansion and contraction, which may prevent the piston 26 from resetting inside the cylinder 27. By pulling the first spring 2, the piston 26 can be reset inside the cylinder 27, thus preventing the air pressure inside the cylinder 27 from being affected by the external environment. The upper end surface of the cylinder 27 slides... A rack 23 is movably connected, and a coil 24 is rotatably connected to the upper end of the fixed frame 7. A second pull rope 38 is fixedly connected to the inner wall of the coil 24. The end of the second pull rope 38 away from the coil 24 is fixedly connected to the telescopic rod 32. A gear 25 is provided at the bottom of the coil 24. The gear 25 meshes with the rack 23. A copper pipe 34 is connected between the cylinder 27 and the air box 9 to supply and exhaust air into the cylinder 27. The copper pipe 34 is made of copper to prevent it from deforming when the fan 4 is drawing air into the cylinder. One side of the cylinder 27 is connected to the air box 9.

[0045] Please refer to Figure 11-13As shown, the adsorption mechanism 101 includes a fixed frame 7, with air ducts 18 fixedly connected to both sides of the fixed frame 7. A rubber tube 5 for drawing air from the air duct 18 is fixedly connected between the air duct 18 and the air box 9. Several steel rings 39 are fixedly installed on the inner wall of the rubber tube 5 to support the inner wall of the rubber tube 5. The rubber tube 5 is made of rubber and can move and deform in the direction of movement of the rotating arm 8 when the rotating arm 8 retracts into the fixed frame 7, exhibiting excellent elasticity. The steel rings 39 can prevent deformation of the rubber tube 5 due to the decrease in internal air pressure when it is drawn in by the fan 4. The inner walls close together, providing support for the inner wall of the rubber tube 5. After being drawn in by the fan 4, the rubber material of the rubber tube 5 exhibits elasticity. For better recovery, a rotating bar 19 is rotatably connected to the inner wall of the air duct 18. A handle is fixedly connected to the upper end of the rotating bar 19 for easy rotation by the staff. Two sets of blocking plates 16 are fixedly connected to the inner wall of the air duct 18. Two sets of rotating plates 17 are provided on the outer surface of the rotating bar 19, which can seal the inside of the air duct 18 by cooperating with the blocking plates 16. A spring torsion spring 20 with a reset function is sleeved on the outer surface. The two sides of the spring torsion spring 20 are fixedly connected to the inner wall of the air duct 18. When the rotating bar 19 is rotated, if the rotating plates 17 are not reset after use, it will be necessary to rotate the rotating bar 19 to reset the rotating plates 17 next time. When the rotating bar 19 is rotated, the spring torsion spring 20 is subjected to torque and stores force.

[0046] When the fan 4 draws air into the suction cup 3, the suction cup 3 is under negative pressure, and the rotating plate 17 will tightly abut against the blocking plate 16. Because the upper surfaces of the rotating plate 17 and the blocking plate 16 are provided with sealing rubber, the two can better seal when they abut against each other, preventing gas leakage inside the suction cup 3. When the air pressure inside the suction cup 3 is normal, the elastic torsion spring 20 will drive the rotating bar 19 to return to its original position. The outer surface of the rotating plate 17 abuts against the blocking plate 16. The bottom of the air duct 18 is fixedly connected to the folded tube 15. The end of the folded tube 15 away from the air duct 18 is fixedly connected to the suction cup 3. The bottom of the rotating bar 19 is provided with an installation groove. The bottom of the rotating bar 19 is provided with a torsion bar 21. The top of the torsion bar 21 is fixedly connected to the universal ball 22. The outer surface of the universal ball 22 abuts against the inner wall of the installation groove.

[0047] A second spring 14, capable of resetting the torsion bar 21, is fitted onto the outer surface of the torsion bar 21. The bottom of the torsion bar 21 is fixedly connected to the inner wall of the folded tube 15. The upper end face of the second spring 14 is fixedly connected to the bottom of the rotating bar 19. The bottom of the second spring 14 is also fixedly connected to the inner wall of the folded tube 15. Due to the suction of the fan 4, the internal air pressure inside the suction cup 3 decreases, causing the suction cup 3 to adhere to the outer surface of the coating. When the internal air pressure of the suction cup 3 is very low, the rotating bar 19 is rotated, causing the rotating plate 17 to close the gap between the two sets of blocking plates 16. When the suction cup 3 is sealed, the air pressure inside is low, which will cause the fixing frame 7 and the rotating arm 8 to be tightly fixed to the outer surface of the coating. When the fan 4 is no longer in use, the fixing frame 7 and the rotating arm 8 can still be fixed to the outer surface of the coating by the suction cup 3, making it difficult to fall off. When the fixing frame 7 and the rotating arm 8 need to be removed, simply rotate the rotating bar 19 again to disengage the rotating plate 17 and the air duct 18. At this time, air enters the suction cup 3, and the suction cup 3 will detach from the coating, making it convenient for staff to take the fixing frame 7 and the rotating arm 8.

[0048] Please refer to Figure 14-15 As shown, the recycling mechanism 301 includes a recycling tray 6, which is rotatably connected to the upper end face of the rotating arm 8. A first pull rope 33, which can pull the telescopic rod 32, is wound around the inner wall of the recycling tray 6. The end of the first pull rope 33 away from the recycling tray 6 is fixedly connected to the telescopic rod 32. A reset torsion spring 41 is installed on one side of the recycling tray 6. The reset torsion spring 41 is provided with a flat groove 40. The flat groove 40 is designed to align with the gap position of the retaining ring 42 and is flat to facilitate the retaining ring 42 to engage with the flat groove 40. A fixing cover 36 is fixedly connected to the upper end face of the rotating arm 8. A retaining ring 42 is provided on one side of the fixing cover 36. The inner wall of the retaining ring 42 engages with the flat groove 40. The side of the fixing cover 36 near the recycling tray 6 abuts against the recycling tray 6.

[0049] Please refer to Figure 4-6 As shown, a trapezoidal strip 12 is provided between the first slide rail 13 and the second track 28. One end of the trapezoidal strip 12 is fixedly connected to the first slide rail 13, and the other end of the trapezoidal strip 12 is slidably connected to the inner wall of the second track 28.

[0050] Working principle of this invention: During use, grasp the fixed handles with both hands. The fixed handles will move the protective shell 1 together, which in turn will move the fixed frame 7 and the rotating arm 8 together. After adjusting the fixed frame 7 and the rotating arm 8 to the appropriate position, start the fan 4. At this time, the fan 4 will draw air into the air box 9, reducing the internal air pressure. The fan 4 will then draw air from the suction cup 3 and the cylinder 27 through the rubber tube 5 and the copper tube 34. Since the suction cup 3 will be in close contact with the outer surface of the coating, the internal air pressure inside the suction cup 3 will decrease due to the suction from the fan 4, causing the suction cup 3 to adhere to the coating. When the air pressure inside the suction cup 3 is very low, rotate the rotating bar 19. The rotating bar 19 drives the rotating plate 17 to seal the gap between the two sets of blocking plates 16. At this time, the air pressure inside the suction cup 3 is low, which will drive the fixing frame 7 and the rotating arm 8 to be tightly fixed on the outer surface of the coating. This makes it convenient for the staff to fix the fixing frame 7 and the rotating arm 8 on the outer surface of the coating. When the outer surface of the coating is irregular or arc-shaped, the fixing frame 7 and the rotating arm 8 can be bent and deformed through the connection of the fixing frame 7 and the rotating arm 8, which is convenient for use on coatings of different shapes.

[0051] When the suction cup 3 cannot be moved, the cylinder 27 will be drawn in by the fan 4 through the copper pipe 34. At this time, the piston 26 moves, which drives the rack 23 to move. The rotation of the rack 23 drives the coil 24 to rotate, which pulls the first pull rope 33. The first pull rope 33 pulls the telescopic rod 32 to move. At this time, the detector 35 is activated to scan the coating. It will move along the inner wall of the first slide rail 13 and the second track 28. When the telescopic rod 32 moves, it pulls back the second pull rope 38. The second pull rope 38 drives the recovery disc 6 to rotate. The recovery disc 6 drives the reset torsion spring 41 to rotate. The reset torsion spring 41 will lock on the retaining ring 42 to store force. When the detector 35 finishes scanning, the fan 4 is turned off. At this time, the piston 26 resets, and the flat slot 40 resets, driving the recovery disc 6 to rotate and recover the first pull rope 33.

[0052] When the fixed frame 7 and the rotating arm 8 rotate, the moving plate 30 moves through the trapezoidal strip 12. Since the trapezoidal strip 12 between the fixed frame 7 and the rotating arm 8 is connected by several trapezoidal strips and is also connected by rubber strips, it has excellent elasticity and is not easy to break.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable microwave absorbing coating thickness measuring device, comprising a mounting frame (7), characterized in that: The upper end face of the fixed frame (7) is provided with a protective shell (1). Rotary arms (8) that can be slidably stored in the fixed frame (7) are rotatably installed on both sides of the fixed frame (7). A fan (4) and an air box (9) are provided on the upper end face of the fixed frame (7). The air outlet of the fan (4) is fixedly connected to the air box (9). Adsorption mechanisms (101) that can adsorb the coating surface are installed on both sides of the rotating arm (8). A second track (28) is provided inside the upper end face of the fixed frame (7). The inner wall of the rotating arm (8) is provided with two sets of first slide rails (13), and the inner wall of the two sets of first slide rails (13) is provided with connecting moving plates (30). The lower end face of the moving plate (30) is fixedly connected with a telescopic rod (32). The end of the telescopic rod (32) away from the moving plate (30) is fixedly connected with an installation block. The two sides of the moving plate (30) are rotatably connected with pulleys. The telescopic rod (32) is fixedly connected between the moving plate (30) and the installation block. The moving plate (30) is slidably connected to the inner wall of the first slide rail (13) through the pulleys. The pulleys on both sides of the installation block abut against the bottom of the first slide rail (13). A pulling mechanism (201) for driving the telescopic rod to slide along the first slide rail (13) and the second track (28) is fixedly installed on one side of the fixed frame (7). A recycling mechanism (301) for pulling and resetting the telescopic rod (32) is fixedly installed on one side of one set of the rotating arm (8). A detector (35) for detecting the thickness of the absorbing coating is fixedly installed at the bottom of the installation block. An elastic trapezoidal strip (12) is fixedly connected between the first slide rail (13) and the second track (28). One end of the trapezoidal strip (12) is fixedly connected to the first slide rail (13), and the other end of the trapezoidal strip (12) is slidably connected to the inner wall of the second track (28).

2. The portable microwave absorbing coating thickness measuring device according to claim 1, characterized in that: The pulling mechanism (201) includes a cylinder (27), a piston (26) is slidably connected to the inner wall of the cylinder (27), a rack (23) is slidably connected to the upper end face of the cylinder (27), a spool (24) is rotatably connected to the upper end face of the fixed frame (7), and a second pull rope (38) is fixedly connected to the inner wall of the spool (24). The end of the second pull rope (38) away from the spool (24) is fixedly connected to the telescopic rod (32). The bottom of the spool (24) is provided with a gear (25), which meshes with the rack (23). One side of the cylinder (27) is connected to the air box (9).

3. The portable microwave absorbing coating thickness measuring device according to claim 1, characterized in that: Both sides of the rotating arm (8) are fixedly connected to air ducts (18). A rubber tube that can draw air from the inside of the air duct (18) is fixedly connected between the air duct (18) and the air box (9). A rotating bar (19) is rotatably connected to the inner wall of the air duct (18), and two sets of blocking plates (16) are provided on the inner wall of the air duct (18). The outer surface of the rotating strip (19) is provided with two sets of rotating plates (17) that can seal the inside of the air duct (18) by cooperating with the blocking plate (16). The bottom of the air duct (18) is fixedly connected to a folded tube (15), and the end of the folded tube (15) away from the air duct (18) is fixedly connected to a suction cup (3).

4. The portable microwave absorbing coating thickness measuring device according to claim 1, characterized in that: The recycling mechanism (301) includes a recycling disc (6), which is rotatably connected to the upper end face of the rotating arm (8). The inner wall of the recycling disc (6) is wound with a first pull rope (33) that can pull the telescopic rod (32). The end of the first pull rope (33) away from the recycling disc (6) is fixedly connected to the telescopic rod (32). A reset torsion spring (41) is installed on one side of the recycling disc (6).

5. The portable microwave absorbing coating thickness measuring device according to claim 4, characterized in that: A fixed cover (36) is fixedly connected to the upper end face of the rotating arm (8). A retaining ring (42) is installed on one side of the fixed cover (36). A reset torsion spring (41) is installed on one side of the recycling disc (6). The side of the fixed cover (36) close to the recycling disc (6) abuts against the recycling disc (6), and a handle is provided on the protective shell (1).

6. A measurement method for a portable microwave absorbing coating thickness measuring device, the measurement method being implemented based on the portable microwave absorbing coating thickness measuring device as described in claim 5, characterized in that, Includes the following steps: S1: Grasp the fixed handles with both hands. The fixed handles will move the protective shell (1) together. The protective shell (1) will move the fixed frame (7) and the rotating arm (8) together. After the fixed frame (7) and the rotating arm (8) are adjusted to the appropriate position, start the fan (4). At this time, the fan (4) will draw air into the air box (9). The air pressure inside the air box (9) will decrease. The fan (4) will draw air into the suction cup (3) and the cylinder (27) through the rubber tube (5) and the copper tube (34). Since the suction cup (3) will be in contact with the outer surface of the coating... When the suction cup (3) is close to the outside surface of the coating, the internal air pressure inside the suction cup (3) decreases due to the suction of the fan (4). When the internal air pressure inside the suction cup (3) is very low, the rotating bar (19) is rotated. The rotating bar (19) drives the rotating plate (17) to seal the gap between the two sets of blocking plates (16). At this time, the internal air pressure inside the suction cup (3) is low, which drives the fixing frame (7) and the rotating arm (8) to be tightly fixed on the outer surface of the coating. The fixing frame (7) and the rotating arm (8) can be bent and deformed, which is convenient for use on coatings of different shapes. S2: When the suction cup (3) is installed, the cylinder (27) will be sucked by the fan (4) through the copper pipe (34). At this time, the piston (26) moves, and the piston (26) will drive the rack (23) to move. The rotation of the rack (23) will drive the coil (24) to rotate. The rotation of the coil (24) will pull the second pull rope (38). The second pull rope (38) will pull the telescopic rod (32) to move. At this time, the detector (35) is activated to scan the coating. It will scan along the first slide rail (13) and the second slide rail (34). When the inner wall of the second track (28) moves, the telescopic rod (32) will pull the first pull rope (33), which will drive the recovery disc (6) to rotate. The recovery disc (6) will drive the reset torsion spring (41) to rotate. The reset torsion spring (41) will be locked on the retaining ring (42) to store energy. When the detector (35) finishes scanning, the fan (4) will be turned off. At this time, the piston (26) will reset, and the flat slot (40) will reset and drive the recovery disc (6) to rotate, thus recovering the first pull rope (33). S3: When the fixed frame (7) and the rotating arm (8) rotate, the moving plate (30) will pass through the trapezoidal strip (12) when it moves. Since the trapezoidal strip (12) between the fixed frame (7) and the rotating arm (8) is connected by several trapezoidal connections and is also connected by rubber strips, it has excellent elasticity and is not easy to break.

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