Infrared detection equipment

Abstract

The utility model relates to the technical field of infrared detection, and provides infrared detection equipment which comprises a supporting frame, an infrared camera and a heating piece, the infrared camera and the heating piece are both located in the middle of the supporting frame and fixedly connected with the supporting frame, and narrow edge conveying devices used for conveying automobile windshields are arranged on the two sides of the supporting frame. A detection gap is formed between the two narrow-edge conveying devices, rollers are arranged at the two ends of each narrow-edge conveying device and connected with a driving motor, the driving motors are fixedly connected with the narrow-edge conveying devices, the rollers are sleeved with narrow-edge conveying belts, and the narrow-edge conveying belts are fixedly connected with the narrow-edge conveying devices. Limiting devices used for fixing the position of the automobile windshield during detection are arranged on the periphery of the infrared camera. By means of the technical scheme, the problem that in the prior art, when a conveying belt of automatic infrared detection equipment conveys automobile windshields, the positions of the windshields are likely to deviate due to vibration, shaking and the like, and accurate detection of an infrared camera on silver wires is affected is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to infrared detection technical field, specifically, relate to infrared detection equipment. BACKGROUND

[0002] With the vigorous development of automobile industry, the quality control of each part of the automobile plays a decisive role in ensuring driving safety and improving driving experience, and the quality monitoring of the automobile windshield as one of the key parts is also concerned. The silver line on the windshield, whether it is used to realize functions such as intelligent wiper induction, anti-glare and other functions on the front windshield, or to bear heating defrosting, defogging and other practical functions on the rear windshield, the integrity and performance stability of the silver line are closely related to the safe driving and comfortable use of the vehicle.

[0003] Infrared detection technology, relying on its outstanding advantages of non-contact, rapid response and intuitive presentation of object surface temperature distribution, has been widely and deeply applied in the detection of automobile windshield silver line. At present, the automatic detection equipment based on infrared detection principle has become a common means of large-scale and efficient detection in this field. This kind of equipment uses conveyor belt to orderly transport automobile windshield to the monitoring area covered by infrared camera, and then carries out batch screening work on the silver line condition.

[0004] The current conventional conveyor belt system inevitably produces vibration and shaking phenomenon during operation due to its own mechanical structure limitation, poor stability of driving motor and lack of effective buffer and shock absorption design. The automobile windshield is hard and brittle in texture and has various shapes and specifications, including conventional rectangular and special styles with arc design to match the body shape. When placed on the vibrating and shaking conveyor belt, the glass is difficult to stably maintain the preset position. On the one hand, the deviation of the position causes the angle deviation of the glass relative to the infrared camera, and the silver line thermal imaging picture obtained by shooting cannot accurately present the original appearance of the silver line, which easily causes the distortion and blur of the silver line at the edge of the picture, and interferes with the judgment of the key indicators such as continuity and uniformity of the silver line. On the other hand, the random movement of the position makes the coordinate position of the silver line in the image not fixed every time, which makes it difficult to implement automatic data analysis and defect identification based on unified standard, greatly increases the risk of misjudgment and omission, reduces the detection accuracy and reliability, and leads to the flow of defective products into the next process, affecting the overall quality and production efficiency of the product. UTILITY MODEL CONTENTS

[0005] The utility model discloses infrared detection equipment, and focuses on solving the problem of glass position deviation caused by vibration and shaking, so as to effectively strengthen the accuracy and stability of the detection work.

[0006] The technical scheme of the utility model is as follows:

[0007] Infrared detection equipment, including support frame, infrared camera, heating piece, infrared camera and heating piece are located in the middle of the support frame and are fixedly connected with the support frame, both sides of the support frame are provided with narrow edge conveying device for conveying automobile windshield, detection gap is arranged between two narrow edge conveying devices, both ends of the narrow edge conveying device are provided with rollers, the rollers are connected with driving motor, the driving motor is fixedly connected with the narrow edge conveying device, the rollers are sleeved with narrow edge conveying belt, the periphery of the infrared camera is provided with limiting device for fixing the position of the automobile windshield during detection.

[0008] Further, the narrow edge conveying belt comprises a buffer layer and a support layer, the buffer layer is fixedly connected with the support layer, the buffer layer is in abutment with the roller, the support layer is located on the side of the buffer layer away from the roller, and the width of the buffer layer is greater than that of the support layer.

[0009] Further, the side of the buffer layer connected with the roller is provided with a tooth-shaped protrusion, the side of the roller in abutment with the buffer layer is provided with a tooth-shaped groove, the tooth-shaped protrusion and the tooth-shaped groove are matched with each other, and the tooth-shaped protrusion is embedded in the tooth-shaped groove.

[0010] Further, the limiting device comprises side positioning columns located on both sides of the support frame and two front and rear positioning columns located between the two narrow edge conveying devices, the side positioning columns and the front and rear positioning columns are fixedly connected with the support frame, the side positioning columns and the front and rear positioning columns are sleeved with buffer sleeves, and the two front and rear positioning columns are provided with driving structures for changing the height of the front and rear positioning columns.

[0011] Further, the driving structure comprises a base, a support seat and a first cylinder, the first cylinder is located at one end of the base, the first cylinder is rotatably connected with the base, the support seat is located at the other end of the base, the support seat is fixedly connected with the base, the middle part of the front and rear positioning column is rotatably connected with the support seat, and the piston rod of the first cylinder is rotatably connected with one end of the front and rear positioning column close to the base.

[0012] Further, the side positioning column comprises a rotating positioning column and a vertical positioning column, the rotating positioning column is located on the side of the vertical positioning column away from the infrared camera, the rotating positioning column is rotatably connected with the support frame, and the vertical positioning column is provided with a moving device, and the moving device is fixedly connected with the support frame.

[0013] Further, the moving device comprises a moving frame, a slide rail and a second cylinder, the slide rail is located on the lower side of the narrow edge conveying belt and is perpendicular to the narrow edge conveying belt, the moving frame is slidably connected with the slide rail, the second cylinder is located on the lower side of the slide rail and faces both sides of the support frame, and the piston rod of the second cylinder is fixedly connected with the moving frame.

[0014] Further, the heating piece comprises a third cylinder, and two current feeding contacts, both of which are fixedly connected with a piston rod of the third cylinder, and the third cylinder is fixedly connected with the support frame.

[0015] The working principle and beneficial effects of the utility model are as follows:

[0016] Compared with the traditional wide conveying belt, the narrow edge conveying belt is lighter in quality and smaller in inertia, and the amplitude of self-vibration and shaking during operation is naturally reduced. Moreover, the narrow edge design makes the contact area between the conveying belt and the glass more accurate and controllable, and the stress distribution is concentrated on the two side edges, which is beneficial to keep the glass conveying posture stable and reduce the deviation risk caused by large-area contact and uneven stress. Even if slight vibration and shaking occur during the conveying process, as soon as the glass reaches the detection area, the limiting device immediately plays a fixing role from all around, firmly locks the glass position, offsets the vibration interference, forcibly corrects the possible position deviation, so that the infrared camera can shoot a clear, standard and accurate silver line image, and the detection accuracy is ensured not to be affected. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be explained further in detail in combination with the drawings and specific embodiments.

[0018] Figure 1 It is the structure schematic diagram of the utility model;

[0019] Figure 2 It is the side view of the utility model;

[0020] Figure 3 It is the A-A section view of Figure 2 ; It is the A-A section view of ; It is the A-A section view of

[0021] ; It is the A-A section view of Figure 4 ; It is the A-A section view of Figure 1 ; It is the A-A section view of ; It is the A-A section view of

[0022] ; It is the A-A section view of Figure 5 ; It is the A-A section view of Figure 2 ; It is the A-A section view of ; It is the A-A section view of

[0023] ; It is the A-A section view of Figure 6 ; It is the A-A section view of Figure 2 ; It is the A-A section view of ; It is the A-A section view of

[0024] ; It is the A-A section view of Figure 7 It is the infrared detection image schematic diagram of the utility model.

[0025] In the diagram: 1. Support frame; 2. Infrared camera; 3. Heating element; 4. Narrow-side conveyor device; 5. Side positioning post; 6. Front and rear positioning posts; 31. Third cylinder; 32. Power contact; 41. Roller; 42. Narrow-side conveyor belt; 43. Drive motor; 44. Toothed protrusion; 45. Toothed groove; 51. Rotating positioning post; 52. Upright positioning post; 53. Moving frame; 54. Slide rail; 55. Second cylinder; 56. Buffer sleeve; 61. First cylinder; 62. Base; 63. Support seat; 421. Buffer layer; 422. Support layer. Detailed Implementation

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0027] like Figures 1 to 7 As shown, this embodiment proposes an infrared detection device, including a support frame 1, an infrared camera 2, and a heating element 3. The infrared camera 2 and the heating element 3 are both located in the middle of the support frame 1 and are fixedly connected to the support frame 1. Narrow-edge conveying devices 4 for conveying car windshields are provided on both sides of the support frame 1. A detection gap is provided between the two narrow-edge conveying devices 4. Rollers 41 are provided at both ends of the narrow-edge conveying devices 4. The rollers 41 are connected to drive motors 43. The drive motors 43 are fixedly connected to the narrow-edge conveying devices 4. A narrow-edge conveyor belt 42 is sleeved on the rollers 41. Limiting devices for fixing the position of the car windshield during detection are provided around the infrared camera 2.

[0028] The support frame 1 serves as the support skeleton of the entire infrared detection device, integrating various components such as the infrared camera 2, heating element 3, and narrow-edge conveying device 4 together, and determining the relative positional relationship between them. The infrared camera 2 is used for infrared imaging detection of the silver line on the windshield of the car. It can capture the infrared radiation signals emitted by the silver line and convert them into electrical signals, ultimately generating visual images. By analyzing these images, it can determine whether the temperature distribution of the silver line is uniform, thereby detecting whether the silver line has defects such as breakpoints, local temperature abnormalities, etc. The heating element 3 is used to heat the silver line on the windshield of the car. During the detection process, by providing additional heat, the temperature of the silver line is raised, enhancing the intensity of the infrared radiation signal of the silver line. The heating element 3 ensures the reliability of the detection results, so that even if there is a slight defect or temperature change in the silver line, it can be effectively captured by the infrared camera 2, thereby improving the detection capability of the entire detection system for silver line defects. The narrow-edge conveying device 4 is used to precisely control the conveying direction of the windshield of the car, avoiding large lateral deviation of the glass during conveying. Compared with traditional large-area conveying belts, the narrow-edge conveying belt 42 is more adaptable to different sizes of windshields and can reduce the obstruction to the glass surface, facilitating detection by the infrared camera 2. The drive motor 43 provides power for the conveying device, driving the rollers 41 to rotate. The rotational motion of the rollers 41 drives the narrow-edge conveying belt 42 to move, thereby realizing the transportation of the windshield of the car in the device. The narrow-edge conveying belt 42 directly contacts the edge of the windshield of the car, conveying the windshield from the inlet to the detection area, and then conveying the detected windshield out. This conveying method can ensure that the windshield passes through the detection area at a stable speed and attitude, which is conducive to improving the accuracy and consistency of detection. At the same time, the cooperation of the drive motor 43 and the rollers 41 can realize precise speed control, adjusting the conveying speed of the windshield according to actual detection needs. The detection gap between the two narrow-edge conveying devices 4 is to provide an unobstructed detection space for the infrared camera 2, so that the infrared camera 2 can directly shoot the silver line on the windshield of the car, avoiding interference of the conveying device with the infrared detection line of sight, ensuring that the infrared camera 2 can obtain complete and clear silver line images. Moreover, this gap also facilitates the heating of the silver line by the heating element 3, making the heat more effectively transmitted to the surface of the silver line. At the same time, the detection gap can match the curvature of the windshield of the car, so that the narrow-edge conveying devices 4 on both sides can better contact the windshield of the car, realizing stable two-end connection of the windshield of the car and the narrow-edge conveying devices 4 on both sides, thereby reducing the positional deviation of the glass caused by vibration and shaking. The limiting device fixes the position of the windshield of the car from all around during detection. It further limits the degrees of freedom of the windshield in the plane, such as movement and rotation, ensuring that the glass maintains a stable position during detection.It can effectively solve the problem of glass position deviation caused by equipment vibration, conveyor belt shaking or other external factors, and ensure that the relative position of the glass and the infrared camera 2 is fixed and unchanged during each detection. This can make the silver line image captured by the infrared camera 2 consistent, facilitating subsequent image analysis and defect judgment, and improving the detection accuracy and reliability.

[0029] In this embodiment, the narrow edge conveyor belt 42 includes a buffer layer 421 and a support layer 422, the buffer layer 421 is fixedly connected with the support layer 422, the buffer layer 421 abuts against the roller 41, and the support layer 422 is located on the side of the buffer layer 421 away from the roller 41. The width of the buffer layer 421 is greater than the width of the support layer 422.

[0030] The buffer layer 421 serves as an intermediate layer between the narrow edge conveyor belt 42 and the roller 41, mainly playing a role of buffering and shock absorption. When the roller 41 vibrates or shakes during operation, the buffer layer 421 can absorb and disperse these impact forces, reducing the vibration transmitted to the automobile windshield. Because its width is greater than that of the support layer 422, it can provide a wider buffer area for the support layer 422 and the glass, enhancing the overall buffering effect. The support layer 422 directly contacts the automobile windshield, providing stable support for the windshield. Its main function is to bear the weight of the glass and maintain the horizontal state of the glass during transmission, preventing the glass from tilting or deforming due to its own weight or slight external force interference. The support layer 422 is fixedly connected with the buffer layer 421, transmitting the relatively stable force absorbed and dispersed by the buffer layer 421 to the glass, ensuring that the glass is transmitted in a relatively stable environment.

[0031] In this embodiment, the side of the buffer layer 421 connected with the roller 41 is provided with a tooth-shaped protrusion 44, and the side of the roller 41 abutting against the buffer layer 421 is provided with a tooth-shaped groove 45. The tooth-shaped protrusion 44 and the tooth-shaped groove 45 are matched with each other, and the tooth-shaped protrusion 44 is embedded in the tooth-shaped groove 45.

[0032] The matching of the tooth-shaped protrusion 44 and the tooth-shaped groove 45 is a mechanical connection method, which is used to enhance the transmission effect between the buffer layer 421 and the roller 41. The tooth-shaped protrusion 44 is embedded in the tooth-shaped groove 45, making the contact between the conveyor belt and the roller 41 more closely, which can effectively transmit power. This structure also has a certain positioning effect, preventing the conveyor belt from shifting relative to the roller 41 in the transverse direction, ensuring the stability of the movement trajectory of the conveyor belt. By enhancing the stability of power transmission, it ensures that the narrow edge conveyor belt 42 can move at a predetermined speed and direction, thereby ensuring that the automobile windshield can smoothly and accurately pass through the detection area. This helps to improve the detection efficiency and reduce the detection errors caused by unstable movement of the conveyor belt.

[0033] In this embodiment, the limiting device includes side positioning columns 5 located on both sides of the support frame 1 and two front and rear positioning columns 6 located between the two narrow edge conveying devices 4. The side positioning columns 5 and the front and rear positioning columns 6 are fixedly connected with the support frame 1. The side positioning columns 5 and the front and rear positioning columns 6 are both sleeved with a buffer sleeve 56. The two front and rear positioning columns 6 are both provided with a driving structure for changing the height of the front and rear positioning columns 6.

[0034] The side positioning columns 5 serve to limit the position of the automobile windshield from the side, prevent the glass from shifting in the width direction during conveying, ensure that the glass can accurately enter and remain in the appropriate detection position, and facilitate the infrared camera 2 to accurately detect the silver line on the windshield. This improves the accuracy and stability of the glass position during detection, reduces the deviation of the detection image caused by lateral displacement, and improves the reliability of the detection result. The front and rear positioning columns 6 serve to limit the position of the automobile windshield in the conveying direction (front and rear direction), avoid the occurrence of inconsistent front and rear positions of the glass during detection, ensure that the glass can accurately remain in the best detection position of the infrared camera 2 during detection, make the position of the silver line image obtained by each detection relatively fixed, and facilitate subsequent image analysis and defect judgment. This enhances the stability of the glass position during detection, improves the consistency and accuracy of the detection result, and reduces the probability of false positives and false negatives. The buffer sleeve 56 is sleeved on the side positioning columns 5 and the front and rear positioning columns 6. When the automobile windshield contacts the positioning columns, the buffer sleeve 56 can serve as a buffer and shock absorber, absorb the impact force generated when the glass contacts the positioning columns, prevent damage to the glass caused by rigid contact, and also reduce the impact force on the positioning columns, protecting the structure of the positioning columns. During glass conveying, if the glass slightly collides with the positioning columns due to slight vibration or shaking of the conveying belt, the buffer sleeve 56 can effectively alleviate the adverse effects of such collisions and maintain the normal use state of the glass and the positioning columns.

[0035] In this embodiment, the driving structure includes a base 62, a support seat 63, and a first air cylinder 61. The first air cylinder 61 is located at one end of the base 62 and is rotationally connected with the base 62. The support seat 63 is located at the other end of the base 62 and is fixedly connected with the base 62. The middle part of the front and rear positioning column 6 is rotationally connected with the support seat 63. The piston rod of the first air cylinder 61 is rotationally connected with one end of the front and rear positioning column 6 close to the base 62.

[0036] The base 62 is the base component of the entire driving structure, bearing the first cylinder 61, the support seat 63 and the front and rear positioning columns 6 connected therewith, providing a stable mounting platform for them, ensuring the relative position stability of each component during the working process, and ensuring the reliability of the whole driving structure. The support seat 63 is fixedly connected with the base 62, providing a rotating support point for the front and rear positioning columns 6, so that the front and rear positioning columns 6 can rotate around the point, cooperate with the driving action of the first cylinder 61, realize the adjustment of the height, and ensure the stability of the front and rear positioning columns 6 during the adjustment and use process. The first cylinder 61 is a power element, which drives the front and rear positioning columns 6 to overturn around the support seat 63 through the extension and retraction movement of the piston rod, thereby changing the height of the front and rear positioning columns 6 during the overturning process, and then overturning down during the conveying process of the automobile windshield to prevent it from interfering with the conveying of the automobile windshield, and overturning up during the detection process to adjust and fix the front and rear positions of the automobile windshield.

[0037] In the embodiment, the side positioning column 5 includes a rotating positioning column 51 and a vertical positioning column 52. The rotating positioning column 51 is located on the side of the vertical positioning column 52 away from the infrared camera 2. The rotating positioning column 51 is rotatably connected with the support frame 1. The vertical positioning column 52 is provided with a moving device, which is fixedly connected with the support frame 1.

[0038] The rotating positioning column 51 rotates around its own axis when the automobile windshield is conveyed. It uses its own rotation characteristics to continuously and closely resist the slight swing or displacement tendency of the side edge of the automobile windshield during the conveying process due to various factors (such as slight vibration of the conveying belt, inertia of the glass itself, etc.), dynamically adjusts the contact state. When the glass side edge moves relative to it, the rotation changes the contact point, cleverly converting the original sliding friction into rolling friction, thereby maintaining the relative stability of the glass in the width direction, assisting the vertical positioning column 52 to ensure that the glass does not deviate obviously in the lateral direction, and accurately enters the best detection area of the infrared camera 2. The rotation function greatly reduces the friction coefficient between the rotating positioning column 51 and the side edge of the automobile windshield, changes from traditional sliding friction to rolling friction, effectively avoids scratching and wearing the side edge of the glass during the contact process, protects the appearance quality of the glass, maintains the integrity of the product, reduces the probability of defective products, and is of great significance especially for automobile windshields with strict surface quality requirements. The vertical positioning column 52 is provided with a moving device, which can move in a direction perpendicular to the narrow side conveying belt 42. It can accurately adjust the distance between itself and the side edge of the glass according to automobile windshields of different sizes, realize accurate side positioning, and ensure that the glass is in the correct detection position in the width direction. During the detection process, it stably resists the side edge of the glass to prevent the glass from shaking left and right, ensures the fixed horizontal position of the glass relative to the infrared camera 2, and creates conditions for obtaining clear and standard silver line detection images.

[0039] In this embodiment, the moving device includes a moving frame 53, a slide rail 54, and a second cylinder 55. The slide rail 54 is located on the lower side of the narrow edge conveyor 42 and is perpendicular to the narrow edge conveyor 42. The moving frame 53 is in sliding connection with the slide rail 54. The second cylinder 55 is located on the lower side of the slide rail 54 and faces both sides of the support frame 1. The piston rod of the second cylinder 55 is fixedly connected with the moving frame 53.

[0040] The slide rail 54 provides a slidable guide track for the moving frame 53, which limits the moving direction of the moving frame 53 to be perpendicular to the narrow edge conveyor 42, ensuring the accuracy of the movement direction of the upright positioning column 52 when adjusting the position, avoiding deviation or shaking, and thus achieving precise positioning control. The moving frame 53 serves as an intermediate component connecting the upright positioning column 52 and the second cylinder 55, and transmits the linear motion of the second cylinder 55 to the upright positioning column 52, driving the upright positioning column 52 to adjust the position along the slide rail 54, so that it can approach or move away from the side edge of the glass according to the actual size of the glass. The second cylinder 55 serves as a power source, which drives the moving frame 53 to slide on the slide rail 54 through the extension and retraction of the piston rod, and thus controls the position movement of the upright positioning column 52. The operator can control the action of the second cylinder 55 according to the width and other parameters of the automobile windshield to be detected, so as to achieve precise positioning adjustment.

[0041] In this embodiment, the heating component 3 includes a third cylinder 31 and two current-carrying contacts 32. The two current-carrying contacts 32 are fixedly connected with the piston rod of the third cylinder 31. The third cylinder 31 is fixedly connected with the support frame 1. The third cylinder 31 serves as a power driving component, which is responsible for controlling the position movement of the two current-carrying contacts 32. Through the extension and retraction of the piston rod, the distance between the current-carrying contacts 32 and the silver line of the automobile windshield can be accurately adjusted, so that the current-carrying contacts 32 can accurately reach the appropriate working position. During the detection process, the third cylinder 31 can be started or stopped as needed, so as to control whether the current-carrying contacts 32 contact the silver line or not, and achieve flexible control over the heating process. The current-carrying contacts 32 serve as the medium for current transmission, and directly contact the silver line on the automobile windshield. The silver line is essentially a conductive circuit with certain resistance characteristics. Under the condition of current conduction, according to Joule's law (the current passing through the conductor will generate heat, and the heat is proportional to the square of the current, the resistance, and the conduction time), the current flowing through the silver line causes it to heat up, and thus the temperature of the silver line itself rises significantly, thereby strengthening the infrared radiation intensity of the silver line, meeting the requirement of the infrared detection equipment for clear and reliable heat signal capture. The two current-carrying contacts 32 cooperate with each other to form a complete current loop with the silver line.

[0042] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An infrared detection device, comprising a support frame (1), an infrared camera (2), and a heating element (3), wherein the infrared camera (2) and the heating element (3) are both located in the middle of the support frame (1) and are fixedly connected to the support frame (1), characterized in that, Both sides of the support frame (1) are provided with narrow edge conveying devices (4) for conveying automobile windshields, a detection gap is arranged between the two narrow edge conveying devices (4), both ends of the narrow edge conveying device (4) are provided with rollers (41), the rollers (41) are connected with driving motors (43), the driving motors (43) are fixedly connected with the narrow edge conveying device (4), a narrow edge conveying belt (42) is sleeved on the roller (41), and the periphery of the infrared camera (2) is provided with a limiting device for fixing the position of the automobile windshield during detection.

2. The infrared detection device of claim 1, wherein, The narrow edge conveying belt (42) comprises a buffer layer (421) and a support layer (422), the buffer layer (421) is fixedly connected with the support layer (422), the buffer layer (421) is in abutment with the roller (41), and the support layer (422) is located on the side of the buffer layer (421) away from the roller (41). The width of the buffer layer (421) is greater than that of the support layer (422).

3. The infrared detection device of claim 2, wherein, The side of the buffer layer (421) connected with the roller (41) is provided with a tooth-shaped protrusion (44), the side of the roller (41) in abutment with the buffer layer (421) is provided with a tooth-shaped groove (45), the tooth-shaped protrusion (44) and the tooth-shaped groove (45) are matched with each other, and the tooth-shaped protrusion (44) is embedded in the tooth-shaped groove (45).

4. The infrared detection device of claim 1, wherein, The limiting device comprises side positioning columns (5) located on both sides of the support frame (1) and front and rear positioning columns (6) located between the two narrow edge conveying devices (4), the side positioning columns (5) and the front and rear positioning columns (6) are fixedly connected with the support frame (1), the side positioning columns (5) and the front and rear positioning columns (6) are sleeved with buffer sleeves (56), and the front and rear positioning columns (6) are provided with driving structures for changing the height of the front and rear positioning columns (6).

5. The infrared detection device of claim 4, wherein, The driving structure comprises a base (62), a supporting seat (63) and a first air cylinder (61), the first air cylinder (61) is located at one end of the base (62) and rotationally connected with the base (62), the supporting seat (63) is located at the other end of the base (62) and fixedly connected with the base (62), the middle part of the front and rear positioning column (6) is rotationally connected with the supporting seat (63), and the piston rod of the first air cylinder (61) is rotationally connected with one end of the front and rear positioning column (6) close to the base (62).

6. The infrared detection device of claim 4, wherein, The side positioning column (5) comprises a rotating positioning column (51) and a vertical positioning column (52), the rotating positioning column (51) is located on the side of the vertical positioning column (52) away from the infrared camera (2), the rotating positioning column (51) is rotationally connected with the support frame (1), and the vertical positioning column (52) is provided with a moving device fixedly connected with the support frame (1).

7. The infrared detection device of claim 6, wherein, The mobile device comprises a mobile frame (53), a slide rail (54), a second cylinder (55), the slide rail (54) is located at the lower side of the narrow side conveying belt (42), the slide rail (54) is perpendicular to the narrow side conveying belt (42), the mobile frame (53) is in sliding connection with the slide rail (54), the second cylinder (55) is located at the lower side of the slide rail (54), the second cylinder (55) is towards both sides of the support frame (1), and the piston rod of the second cylinder (55) is fixedly connected with the mobile frame (53).

8. The infrared detection device of claim 1, wherein, The heating piece (3) comprises a third cylinder (31) and two current-carrying contacts (32), both of which are fixedly connected with the piston rod of the third cylinder (31), and the third cylinder (31) is fixedly connected with the support frame (1).

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