Compactness measuring device based on roll diameter of material roll and coating apparatus

Abstract

The utility model discloses a kind of based on material roll diameter's compression determination device and coating equipment, wherein based on material roll diameter's compression determination device includes compression assembly and determination assembly, the compression assembly is used to abut the radial outer surface of the material roll, and servo based on the change of the material roll diameter, the determination assembly is used to determine the moving distance of the compression assembly, to obtain the roll diameter of the material roll. By applying the compression determination device based on material roll diameter proposed in the utility model, the accuracy of material roll diameter measurement can be improved, and the product quality problems caused by improper use of material roll due to the inability to obtain accurate roll diameter data can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of coating equipment technology, and in particular to a pressing and measuring device and coating equipment based on the roll diameter. Background Technology

[0002] Material rolls are typically wound and unwound using rollers, and loaded and unloaded using traction rollers. To effectively control the amount of material used and reduce waste, the industry commonly installs material roll diameter measuring devices on winding and unwinding equipment. This device indirectly reflects the length of the material roll used by measuring its diameter, thus providing data support for production management.

[0003] In related technologies, material rolls are prone to wrinkling and floating during the winding and unwinding processes. This is due to a combination of factors, including the diversity of material rolls, variations in winding and unwinding speeds, and vibrations during equipment operation. Wrinkling and floating of the material roll results in inconsistent surface flatness on the rollers, severely impacting the accuracy of roll diameter measurement. Existing measuring devices struggle to accurately determine the actual roll diameter when faced with variations in surface flatness. This not only leads to misjudgments of the amount of material used during production, increasing production costs, but may also affect product quality and production efficiency. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a compression measuring device based on the roll diameter, which can improve the accuracy of roll diameter measurement and reduce product quality problems caused by improper use of rolls due to the inability to obtain accurate roll diameter data.

[0005] This invention also proposes a coating device having the above-mentioned compression measuring device based on the roll diameter.

[0006] According to a first aspect of the present invention, a compression measuring device based on the roll diameter includes a compression component and a measuring component. The compression component is used to abut against the radial outer surface of the roll and moves according to the change in the roll diameter. The measuring component is used to measure the moving distance of the compression component to obtain the roll diameter.

[0007] The compression measuring device based on the roll diameter according to embodiments of this utility model has at least the following beneficial effects: Because it can accurately measure the roll diameter, production managers can more precisely grasp the roll usage, rationally arrange roll replacement time, avoid waste of roll tail material due to inaccurate measurement, and reduce production costs. Accurate roll diameter measurement helps the production control system better control the roll winding and unwinding speed and tension, ensuring the stability and continuity of the production process. This not only improves production efficiency but also reduces product quality problems caused by improper roll use, increasing the product qualification rate.

[0008] According to some embodiments of the present invention, the pressing assembly includes a driving member and a pressure roller, the pressure roller being disposed at the output end of the driving member for tightly adhering to the radial outer surface of the material roll.

[0009] According to some embodiments of the present invention, the output end of the driving component is connected to a driving plate, the driving plate is provided with a bearing component, and the shaft of the pressure roller is rotatably connected to the bearing component.

[0010] According to some embodiments of the present invention, the measuring component includes a measuring sensor connected to the clamping component for measuring the movement distance of the clamping component.

[0011] According to some embodiments of the present invention, the measuring component includes a mounting frame and a measuring sensor, wherein the mounting frame is connected to the drive plate and the measuring sensor is connected to the mounting frame.

[0012] According to some embodiments of the present invention, the measuring component further includes a movable frame, which is slidably connected to the fixed frame via a slide rail frame. The movable frame has an abutment portion and a reference plate. The abutment portion always abuts against the placement roller of the material roll, and the measuring end of the measuring sensor abuts against the reference plate.

[0013] According to some embodiments of the present invention, an elastic element is provided between the fixed frame and the movable frame, and one end of the elastic element is connected to and drives the abutment portion to be in close contact with the placement roller.

[0014] According to some embodiments of the present invention, the abutting part is connected to the reference plate and is located on the side away from the fixing frame. The end of the abutting part is provided with a roller, and the roller rotates and abuts against the radial surface of the placement roller.

[0015] According to some embodiments of the present invention, the placement roller is an unwinding roller or a winding roller.

[0016] The coating apparatus according to a second aspect of the present invention includes a compression measuring device based on the roll diameter as described in any of the preceding claims.

[0017] The coating equipment according to the embodiments of this utility model has at least the following beneficial effects: The clamping and measuring device is installed near the unwinding or rewinding roller of the coating equipment. Based on changes in the roll diameter, the clamping component moves, and the measuring component monitors the roll diameter changes in real time. When the roll diameter changes, the measuring component transmits data to the control system of the coating equipment. The control system adjusts parameters such as unwinding or rewinding speed and tension based on the measurement results to ensure the stability and uniformity of the coating process. Applying this clamping and measuring device to the coating equipment can effectively improve the control accuracy of the roll unwinding and rewinding process, and reduce coating quality problems caused by changes in roll diameter, such as uneven coating thickness and inconsistent coating width. Simultaneously, it can also improve production efficiency, reduce production costs, and enhance the market competitiveness of the products.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a schematic diagram of a compression measuring device based on the roll diameter according to an embodiment of the present invention;

[0021] Figure 2 This is a side view schematic diagram of a compression measuring device based on the roll diameter according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the measuring component of the compression measuring device based on the roll diameter according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the fixed frame and movable frame of the compression measuring device based on the roll diameter according to an embodiment of the present invention.

[0024] Reference numerals: measuring component 100; measuring sensor 110; fixed frame 120; moving frame 130; reference plate 131; abutment part 132; roller 133; slide rail 140; elastic element 150; pressing component 200; pressure roller 210; bearing component 211; driving component 220; driving plate 230; material roll 300; placement roller 400. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution. In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] Reference Figure 1 , Figure 2, Figure 3 and Figure 4 This utility model proposes a pressing and measuring device based on the diameter of a material roll 300, including a pressing component 200 and a measuring component 100. The pressing component 200 is used to abut against the radial outer surface of the material roll 300 and can follow the change in the diameter of the material roll 300; the measuring component 100 is used to measure the moving distance of the pressing component 200, thereby obtaining the diameter of the material roll 300.

[0030] It should be noted that the clamping assembly 200 always abuts against the radial outer surface of the roll 300 through physical contact. When the roll 300 is wound or unwound, its diameter dynamically changes due to wear or increase. The clamping assembly 200 provides continuous preload through an elastic element or drive element 220, enabling the pressure roller 210 or clamping surface of the clamping assembly 200 to adapt to changes in roll diameter and maintain close contact with the surface of the roll 300. For example, when the roll diameter of the roll 300 decreases, the elastic element pushes the clamping assembly 200 towards the roll 300; when the roll diameter increases, the surface of the roll 300 pushes the clamping assembly 200 to move in the opposite direction. This process is achieved through a mechanical follow-up mechanism, requiring no manual intervention or complex control.

[0031] The measuring component 100 monitors the movement distance of the clamping component 200 in real time using a high-precision displacement sensor. The sensor is installed at a fixed reference point, and its measuring end is directly or indirectly connected to the moving part of the clamping component 200. When the clamping component 200 moves with the change in roll diameter, the sensor converts the physical displacement into an electrical signal, which is then converted into roll diameter data through an algorithm. For example, by calibrating the distance between the initial position of the clamping component 200 and the central axis of the roll 300, and combining this with the real-time displacement of the clamping component 200, the instantaneous roll diameter of the roll 300 is calculated using geometric relationships.

[0032] Specifically, to address the issue of inconsistent surface flatness caused by wrinkles and floating of the material roll 300, this embodiment improves measurement accuracy by replacing line contact with surface contact: the clamping assembly 200 uses a wide-width pressure roller 210 or a flexible clamping surface to increase the contact area with the material roll 300 and reduce the interference of local wrinkles on the measurement results. Furthermore, pre-calibration is performed in both empty and full-wound states of the material roll 300 to establish a mapping relationship between displacement and roll diameter, and measurement deviations are corrected through real-time feedback.

[0033] Understandably, by using the continuous follow-up contact of the clamping component 200 and the high-precision displacement measurement of the measuring component 100, this embodiment effectively solves the problem of inconsistent surface flatness caused by the floating wrinkles of the material roll 300. Surface contact reduces the interference of local deformation on the measurement results. The anti-interference design mechanism enables the device to adapt to the measurement needs of material rolls 300 with different materials and working conditions. Furthermore, this embodiment adopts a measurement principle combining pure mechanical follow-up and displacement sensing, eliminating the need for complex optical or visual recognition systems, thus reducing equipment costs and maintenance difficulty. The modular design allows the clamping component 200 and the measuring component 100 to be replaced or upgraded independently, improving the system's scalability. In addition, because the roll diameter of the material roll 300 can be accurately measured, production managers can more accurately grasp the usage of the material roll 300, rationally arrange the replacement time of the material roll 300, avoid waste of material roll tail material due to inaccurate measurement, and reduce production costs. Accurate measurement of the roll diameter of the material roll 300 helps the production control system to better control the winding and unwinding speed and tension of the material roll 300, ensuring the stability and continuity of the production process. This can not only improve production efficiency, but also reduce product quality problems caused by improper use of material roll 300, and improve the product qualification rate.

[0034] Reference Figure 1 and Figure 2 In a specific embodiment, the pressing assembly 200 includes a pressure roller 210 and a drive component 220. The pressure roller 210 is made of a high-strength, low-friction material, such as polyurethane, to ensure that it provides sufficient pressure when contacting the roll 300 while minimizing damage to the surface of the roll 300. When the roll diameter of the roll 300 is large, the elastic element is compressed, and the pressure roller 210 tightly contacts the radial outer surface of the roll 300 under the action of the elastic element. As the roll 300 is wound and unwound, the roll diameter gradually decreases, and the elastic element gradually returns to its original shape, pushing the pressure roller 210 to follow suit, always maintaining contact with the roll 300.

[0035] In some embodiments, the clamping assembly 200 includes a pressure roller 210 and a drive component 220, wherein the drive component 220 of the clamping assembly 200 is a cylinder. The cylinder is securely mounted on the equipment frame by bolts, and its installation position is precisely calculated to ensure that the output end of the cylinder is accurately oriented towards the material roll 300. The cylinder is a standard model, featuring adjustable stroke and stable output force, and its parameters can be set according to the measurement requirements of material rolls 300 of different specifications. The pressure roller 210 is made of high-strength, wear-resistant polyurethane material, and its surface is specially treated to have a low coefficient of friction, which allows it to closely adhere to the surface of the material roll 300 without damaging it. The pressure roller 210 is mounted on the output end of the cylinder via a connector made of high-strength metal material, and a secure connection between the pressure roller 210 and the cylinder output end is ensured by means of threaded connection or other methods. When the cylinder is started, its output end extends or retracts under the action of compressed air, driving the pressure roller 210 to approach or move away from the material roll 300, so that the pressure roller 210 can closely adhere to the radial outer surface of the material roll 300.

[0036] The cylinder, acting as the driving component 220, offers advantages such as fast response, smooth operation, and high control precision. By adjusting the cylinder's inlet pressure and flow rate, the contact pressure between the pressure roller 210 and the material roll 300 can be precisely controlled, adapting to material rolls 300 of different materials and specifications. The pressure roller 210, in close contact with the surface of the material roll 300, can promptly detect changes in the roll diameter, providing an accurate basis for subsequent roll diameter measurement and improving measurement reliability. Furthermore, the cylinder's simple structure, convenient maintenance, and low cost contribute to reducing the overall cost of the equipment.

[0037] In some embodiments, the pressing assembly 200 includes a drive element 220 and a pressure roller 210. The drive element 220 is an electric push rod, which has advantages such as simple structure, convenient control, and adjustable stroke. The electric push rod is fixedly mounted on the equipment frame by bolts, with its output end facing the material roll 300. The pressure roller 210 is made of rubber, which has good elasticity and friction, enabling it to better conform to the surface of the material roll 300 without damaging it. The pressure roller 210 is mounted on the output end of the electric push rod via a connector. When the electric push rod is activated, its output end extends or retracts, driving the pressure roller 210 closer to or further away from the material roll 300, so that the pressure roller 210 can closely adhere to the radial outer surface of the material roll 300. By using the electric push rod as the drive element 220, the contact pressure and position between the pressure roller 210 and the material roll 300 can be precisely controlled, adapting to material rolls 300 of different specifications and materials. The pressure roller 210 is in close contact with the surface of the material roll 300, which can detect changes in the roll diameter of the material roll 300 in a timely manner, providing an accurate basis for subsequent roll diameter measurement and improving the reliability of the measurement.

[0038] Furthermore, the drive component 220 is a cylinder, and the output end of the cylinder is connected to the drive plate 230 via bolts. The drive plate 230 is made of high-strength aluminum alloy and is precision-machined, featuring light weight and high strength, ensuring stable movement under the drive of the cylinder. A bearing component 211 is bolted onto the drive plate 230. The bearing component 211 is a tapered roller bearing, which can withstand large radial and axial loads and is suitable for the installation requirements of the pressure roller 210 in this embodiment. The shaft of the pressure roller 210 is connected to the inner ring of the tapered roller bearing through an interference fit, allowing the pressure roller 210 to rotate freely on the bearing component 211. When the material roll 300 rotates, the pressure roller 210 can rotate accordingly, reducing the friction between it and the material roll 300 and avoiding damage to the surface of the material roll 300. The cylinder drives the output end to move via compressed air, causing the drive plate 230 and the pressure roller 210 to move to adapt to changes in the roll diameter of the material roll 300.

[0039] The drive plate 230 and bearing 211 allow the pressure roller 210 to be stably mounted on the output end of the cylinder and to rotate freely. This structure not only ensures good contact between the pressure roller 210 and the material roll 300, but also reduces heat and wear caused by friction, extending the service life of the equipment. The high load-bearing capacity of the bearing 211 allows the device to adapt to material rolls 300 of different weights and specifications, improving the equipment's versatility. Simultaneously, the cylinder-driven mechanism makes the movement of the pressure roller 210 smoother and faster, contributing to improved measurement accuracy and real-time performance.

[0040] The measuring component 100 includes a measuring sensor 110, which is a laser displacement sensor. The laser displacement sensor is bolted to the equipment frame, with its measuring end facing the clamping component 200. In this embodiment, the laser displacement sensor is indirectly connected to the drive plate 230 in the clamping component 200 via a connector. The movement distance of the clamping component 200 is reflected by measuring the movement distance of the drive plate 230. When the diameter of the material roll 300 changes, the clamping component 200 moves accordingly, and the position of the drive plate 230 changes accordingly. The laser displacement sensor can detect the movement distance of the drive plate 230 in real time and transmit the data to the control system.

[0041] In other embodiments, the measuring sensor 110 uses a digital displacement sensor as the core component of the measuring assembly 100. The digital sensor incorporates a high-precision analog-to-digital converter, directly converting the physical displacement into a digital signal output, avoiding noise interference and signal attenuation during analog signal transmission. For example, a digital laser displacement sensor emits a laser beam and receives the reflected light, calculating the displacement using phase difference or time difference, with an accuracy down to the micrometer level. Furthermore, the digital sensor supports high-speed communication protocols, enabling real-time transmission of displacement data to the control system. The sensor also incorporates a microprocessor, which can preprocess the raw data, reducing the computational burden on the control system.

[0042] In some embodiments, the measuring component 100 includes a mounting bracket 120 and a measuring sensor 110. The mounting bracket 120 is welded from a metal profile and is fixedly mounted to the equipment frame by bolts. The position of the mounting bracket 120 is rationally designed according to the movement range of the clamping component 200 to ensure that the measuring sensor 110 can accurately measure the movement distance of the clamping component 200. The measuring sensor 110 is fixedly mounted to the mounting bracket 120 by bolts.

[0043] Reference Figure 4 In this embodiment, the fixed frame 120 and the drive plate 230 maintain a certain relative positional relationship through connecting rods and other connecting parts, so that the measuring sensor 110 can accurately measure the moving distance of the drive plate 230.

[0044] Reference Figure 4 In some embodiments, the measuring component 100 further includes a movable frame 130, which is made of sheet metal. A slide rail 140 is bolted to the fixed frame 120. The slide rail 140 is a linear guide rail, characterized by smooth movement, high precision, and strong load-bearing capacity. The movable frame 130 is slidably connected to the slide rail 140 via a slider, allowing the movable frame 130 to slide freely on the slide rail 140. The movable frame 130 has an abutment portion 132 and a reference plate 131. The abutment portion 132 is located at one end of the movable frame 130 and is used to always abut against the placement roller 400 of the material roll 300. The reference plate 131 is located at the other end of the movable frame 130 and is disposed opposite to the abutment portion 132. The measuring end of the measuring sensor 110 abuts against the reference plate 131. When the diameter of the material roll 300 changes, causing the position of the placement roller 400 to change, the moving frame 130 will slide along with the movement of the placement roller 400, and the position of the reference plate 131 will also change. The measuring sensor 110 can detect the moving distance of the reference plate 131 in real time, thereby indirectly measuring the change in the diameter of the material roll 300.

[0045] Reference Figure 4Furthermore, an elastic element 150, which is a spring, is provided between the fixed frame 120 and the movable frame 130. One end of the spring is connected to the fixed frame 120 via a hook or similar means, and the other end is connected to the movable frame 130. The spring's elastic force can drive the abutment part 132 to press tightly against the placement roller 400. When the diameter of the material roll 300 is large, the placement roller 400 is relatively far away, the spring is stretched, and the movable frame 130 moves towards the placement roller 400 under the spring's elastic force, ensuring that the abutment part 132 remains pressed tightly against the placement roller 400. When the diameter of the material roll 300 decreases, the placement roller 400 moves closer, the spring gradually returns to its original state, and the movable frame 130 also moves towards the fixed frame 120. The combined action of the cylinder's driving force and the spring's elastic force allows the pressing assembly 200 and the movable frame 130 to better adapt to changes in the diameter of the material roll 300.

[0046] The elastic element 150 ensures that the abutment portion 132 remains firmly against the placement roller 400, guaranteeing the normal operation of the measuring device under different roll diameters of the material roll 300. Simultaneously, the elastic element 150 also acts as a buffer, reducing the impact of material roll 300 vibration and other factors on the measurement results, thus improving measurement stability and accuracy. The combination of cylinder drive and spring buffering makes the movement of the clamping assembly 200 and the moving frame 130 smoother, further improving measurement accuracy.

[0047] The abutment portion 132 is bolted to the reference plate 131, or the abutment portion 132 is integrally formed with the reference plate 131 and is located on the side opposite to the fixing frame 120. A roller 133 is mounted on the end of the abutment portion 132 via a pivot pin. The roller 133 rotates and abuts against the radial surface of the placement roller 400. When the placement roller 400 rotates, the roller 133 can rotate accordingly, reducing the friction between the roller and the placement roller 400 and avoiding wear and heat caused by friction. The measuring end of the measuring sensor 110 abuts against the reference plate 131 and obtains the change in the roll diameter of the material roll 300 by measuring the moving distance of the reference plate 131. The cylinder drives the pressing assembly 200 to move, and at the same time, the position change of the placement roller 400 is transmitted to the moving frame 130 through the roller 133, causing the moving frame 130 to slide, the position of the reference plate 131 to change, and the measuring sensor 110 to perform measurement. The roller 133 changes the contact between the contact part 132 and the placement roller 400 from sliding friction to rolling friction, greatly reducing friction and lowering equipment wear and energy consumption. Simultaneously, the roller 133 better adapts to the rotation of the placement roller 400, ensuring close contact between the contact part 132 and the placement roller 400, thus improving measurement accuracy and reliability. The cylinder drive makes the entire measurement process more stable and efficient, enabling timely reflection of changes in the diameter of the material roll 300.

[0048] It should be noted that the placement roller 400 can be either an unwinding roller or a take-up roller. During the unwinding process, the material roll 300 gradually unfolds from the unwinding roller, and as the material roll 300 decreases, the roll diameter gradually decreases; during the take-up process, the material roll 300 gradually winds around the take-up roller, and the roll diameter gradually increases. The pressing and measuring device based on the roll diameter of the material roll 300 of this invention is installed in the coating equipment. The cylinder, as the driving component 220, can quickly respond to changes in the roll diameter of the material roll 300 and drive the pressing assembly 200 to move. The measuring assembly 100 measures the moving distance of the pressing assembly 200 in real time, thereby obtaining the change in the roll diameter of the material roll 300 and providing data support for the control of the unwinding or take-up process. Whether during the unwinding or take-up process, the change in the roll diameter of the material roll 300 can be accurately measured, providing a strong guarantee for the automated control of the production process and helping to improve production efficiency and product quality. At the same time, the cylinder has a relatively low cost, which helps to reduce the overall cost of the equipment.

[0049] This invention also proposes a coating equipment, including a pressing and measuring device based on the roll diameter of the material roll 300 as described in any of the preceding claims. In the coating equipment, the unwinding and winding operations of the material roll 300 are crucial to the coating quality. The pressing and measuring device is installed near the unwinding or winding roller of the coating equipment. Based on changes in the roll diameter of the material roll 300, the pressing component 200 moves, and the measuring component 100 monitors the changes in the roll diameter of the material roll 300 in real time. When the roll diameter of the material roll 300 changes, the measuring component 100 transmits the data to the control system of the coating equipment. The control system adjusts parameters such as unwinding or winding speed and tension based on the measurement results to ensure the stability and uniformity of the coating process. Applying this pressing and measuring device to the coating equipment can effectively improve the control accuracy of the coating equipment during the unwinding and winding process of the material roll 300, reducing coating quality problems caused by changes in the roll diameter of the material roll 300, such as uneven coating thickness and inconsistent coating width. Simultaneously, it can also improve production efficiency, reduce production costs, and enhance the market competitiveness of the product.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A compression measuring device based on the roll diameter, characterized in that, include: A clamping assembly and a measuring assembly are provided. The clamping assembly is used to abut against the radial outer surface of the material roll and moves according to the change in the roll diameter. The measuring assembly is used to measure the moving distance of the clamping assembly to obtain the roll diameter.

2. The compression measuring device based on the roll diameter according to claim 1, characterized in that, The clamping assembly includes a drive component and a pressure roller. The pressure roller is disposed at the output end of the drive component and is used to tightly adhere to the radial outer surface of the material roll.

3. The compression measuring device based on the roll diameter according to claim 2, characterized in that, The output end of the drive component is connected to the drive plate, the drive plate is provided with a bearing component, and the shaft of the pressure roller is rotatably connected to the bearing component.

4. The compression measuring device based on the roll diameter according to claim 1, characterized in that, The measuring component includes a measuring sensor connected to the clamping component, used to measure the movement distance of the clamping component.

5. The compression measuring device based on the roll diameter according to claim 3, characterized in that, The measuring assembly includes a mounting bracket and a measuring sensor. The mounting bracket is connected to the drive plate, and the measuring sensor is connected to the mounting bracket.

6. The compression measuring device based on the roll diameter according to claim 5, characterized in that, The measuring assembly also includes a movable frame, which is slidably connected to the fixed frame via a slide rail. The movable frame has an abutment part and a reference plate. The abutment part always abuts against the placement roller of the material roll, and the measuring end of the measuring sensor abuts against the reference plate.

7. The compression measuring device based on the roll diameter according to claim 6, characterized in that, An elastic element is provided between the fixed frame and the movable frame, and one end of the elastic element is connected to and drives the abutment part to be in close contact with the placement roller.

8. The compression measuring device based on the roll diameter according to claim 6, characterized in that, The abutment portion is connected to the reference plate and is located on the side away from the fixing frame. The end of the abutment portion is provided with a roller, and the roller rotates and abuts against the radial surface of the placement roller.

9. The compression measuring device based on the roll diameter according to claim 6, characterized in that, The placement roller is either an unwinding roller or a take-up roller.

10. A coating apparatus, characterized in that, Includes the compression measuring device based on the roll diameter as described in any one of claims 1 to 9.

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