Rolling tail detection device and connecting device

Abstract

The utility model relates to a roll tail detection device and a connection device. The roll tail detection device comprises a first coiled material which is being uncoiled and a detection device, the detection device comprises a first detection device and a second detection device, the first detection device is used for detecting the outer diameter of the remaining first coiled material after uncoiling, and when the outer diameter reaches a first numerical value, the second detection device is started to collect an image of the remaining first coiled material and recognize the coiled tail of the first coiled material. When the coiled material is about to reach the coil tail, the second detection device is started to recognize the image of the remaining first coiled material and recognize the coil tail, so that unnecessary resource consumption is effectively reduced, and the resource utilization efficiency is improved; meanwhile, the second detection device is triggered by accurately monitoring the outer diameter through the first detection device, it is ensured that the second detection device is started and accurately collects an image containing roll tail features when the second detection device is about to arrive at the roll tail, then high-precision roll tail recognition is achieved, and high efficiency and high precision of roll tail recognition are met.

Description

Technical Field

[0001] This application relates to the field of fiberglass cloth production equipment technology, and in particular to a roll end detection device and splicing device. Background Technology

[0002] In industrial production, rolled materials such as paper, film, metal foil, and textiles are widely used. When these rolled materials are continuously supplied to the production process, the automatic identification of the roll ends becomes a key step in ensuring production continuity, improving production efficiency, and saving materials.

[0003] Traditionally, the inspection of roll ends has relied heavily on manual methods. Manual inspection has many drawbacks, such as low efficiency, the need for workers to constantly monitor the condition of the roll, and the difficulty in accurately capturing the roll end status on a high-speed production line.

[0004] With the development of technology, automatic identification technology has emerged and is gradually being applied to the field of roll end detection. For example, detection technology based solely on photoelectric sensors determines the roll end position by emitting and receiving light and analyzing changes in light occlusion by the roll material. However, this method has high requirements for the light transmittance, color, and surface flatness of the roll material. When the roll material is dark in color or has a rough and uneven surface, the light reflection or scattering is unstable, causing fluctuations in the sensor signal and resulting in inaccurate detection results. For materials like black plastic film, which strongly absorb light, the detection accuracy of photoelectric sensors is significantly reduced.

[0005] Therefore, there is an urgent need for a more efficient, accurate, and adaptable automatic tail recognition solution to meet the ever-increasing demands of industrial production. Utility Model Content

[0006] To address the aforementioned problems, this application provides a roll end detection device, comprising a first roll being unwound and a detection device:

[0007] The detection device is positioned in the direction of travel of the first roll after it has been unwound;

[0008] The detection device includes a first detection device and a second detection device. The first detection device is used to detect the outer diameter of the remaining first roll after unwinding. When the outer diameter reaches a first value, the second detection device is activated to acquire an image of the remaining first roll and identify the end of the first roll.

[0009] Furthermore, the first detection device is a radar ranging device or a laser ranging device.

[0010] Furthermore, the second detection device includes at least one area array vision camera spaced apart along the width direction of the first roll material.

[0011] Furthermore, the detection device also includes a third detection device disposed in the travel direction after the first roll is unwound, the third detection device being used to continuously detect the tension of the first roll after it is unwound.

[0012] This application also provides a splicing device, including the aforementioned curling tail detection device.

[0013] Furthermore, it also includes a second roll of material waiting to be unwound, wherein when the first roll of material is unwound to the end, the end of the first roll of material is connected to the beginning of the second roll of material.

[0014] Furthermore, the splicing device also includes a welding device arranged along the travel direction of the first roll after it is unwound, the welding device being used to splice the tail of the first roll to the head of the second roll.

[0015] Furthermore, the splicing device also includes a cutting device, which is used to cut the first roll after the first roll and the second roll are spliced.

[0016] Furthermore, the connecting device also includes a storage assembly, which includes a floating roller that can move up and down.

[0017] Furthermore, the splicing device also includes a first unwinding device for loading the first roll, a second unwinding device for loading the second roll, and a rotating structure. The first unwinding device and the second unwinding device are disposed at opposite ends of the rotating structure, and the rotating structure rotates around its center to interchange the positions of the first unwinding device and the second unwinding device.

[0018] This application relates to a roll end detection device and a splicing device. The roll end detection device includes a first roll material being unwound and a detection device, which is positioned in the direction of travel of the first roll material after unwinding. The detection device includes a first detection device and a second detection device. The first detection device is used to detect the outer diameter of the remaining first roll material after unwinding. When the outer diameter reaches a first value, the second detection device is activated to acquire an image of the remaining first roll material and identify the roll end. This application activates the second detection device to identify the image of the remaining first roll material and identify the roll end when the roll material is about to reach the roll end, effectively reducing unnecessary resource consumption and improving resource utilization efficiency. At the same time, by using the precise monitoring of the outer diameter by the first detection device to trigger the second detection device, it is ensured that the second detection device is activated when the roll end is about to be reached, accurately acquiring an image containing roll end features, thereby achieving high-precision roll end recognition and meeting the requirements of high efficiency and high precision in roll end recognition. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the end-of-print detection device for this application;

[0020] Figure 2 This is a schematic diagram of the connection device of this application.

[0021] Explanation of reference numerals in the attached figures

[0022] 1. First unwinding device; 11. First roll material; 2. Second unwinding device; 21. Second roll material; 3. Detection device; 31. First detection device; 32. Second detection device; 33. Third detection device; 4. Rotating structure; 5. Welding device; 51. Upper welding head; 52. Lower welding head; 6. Cutting device; 71. Floating roller; 72. Fixed guide roller. Detailed Implementation

[0023] To gain a more detailed understanding of the features and technical content of the embodiments disclosed herein, the following description is provided in conjunction with the accompanying drawings. Figure 1-2 The implementation of the embodiments of this disclosure is described in detail. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, various details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other instances, well-known structures and apparatuses may be simplified in their depiction to simplify the drawings.

[0024] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0026] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0027] Unless otherwise stated, the term "multiple" means two or more.

[0028] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0030] To provide a better understanding of the purpose, structure, features, and functions of this application, detailed descriptions are provided below with reference to specific embodiments.

[0031] To address the aforementioned issues, this application provides a roll end detection device, comprising a first roll 11 being unwound and a detection device 3; the detection device 3 is disposed in the travel direction of the first roll 11 after unwinding; the detection device 3 includes a first detection device 31 and a second detection device 32, the first detection device 31 being used to detect the outer diameter of the remaining first roll 11 after unwinding, and when the outer diameter reaches a first value, the second detection device 32 is activated to acquire an image of the remaining first roll 11 and identify the roll end of the first roll 11.

[0032] When the first roll 11 is in the unwound state, it travels along a fixed transmission path. After unwinding, the first roll 11 is in a continuously unfolded state. The detection device 3 is located downstream of the first roll 11 in the direction of travel after unwinding, and maintains a non-contact detection distance from the surface of the first roll 11 to detect the state of the first roll 11 in real time and identify the roll end.

[0033] The detection device 3 includes a first detection device 31 and a second detection device 32. The first detection device 31 uses a non-contact distance sensor and is radially installed facing the outer surface of the first roll 11 to predict the position of the roll end in advance. The second detection device 32 is arranged side by side with the first detection device 31, maintaining a certain distance from the first detection device 31 but meeting the requirements for electrical linkage, ensuring that it is activated and accurately identifies the roll end when the first roll 11 is about to reach the roll end.

[0034] The first detection device 31 scans the remaining outer diameter of the first roll 11 in real time. That is, it measures the distance from the edge of the first roll 11 to the first detection device 31 in real time, and calculates the remaining outer diameter of the first roll 11 by combining the known initial radius of the first roll 11. When it detects that the outer diameter has shrunk to a preset first value, it generates a trigger signal. After receiving the trigger signal from the first detection device 31, the second detection device 32 starts and identifies the end of the first roll 11.

[0035] The first detection device 31 detects the outer diameter of the remaining first roll 11 without being affected by the color or texture of the first roll 11, so as to ensure that the second detection device 32 is activated only when the end of the first roll 11 is near, thus avoiding invalid triggering.

[0036] The second detection device 32 is initially in a dormant state, and only starts working after the first detection device 31 detects that the outer diameter of the first roll 11 has reached the first value, thereby reducing the power consumption of the second detection device 32 by more than 70%.

[0037] The first value can be dynamically configured based on the initial diameter of the first roll 11, the material thickness of the first roll 11, or the unwinding speed of the first roll 11. For example, on a high-speed unwinding production line, the remaining amount of roll material decreases faster, so it may be necessary to set a relatively large first value to ensure that the second detection device 32 is activated in time before the roll material is used up. On a low-speed unwinding production line, the first value can be appropriately reduced to reduce the number of times the second detection device 32 is activated unnecessarily. The specific setting of the first value is not limited in this application and can be adjusted and optimized according to the actual production situation.

[0038] The outer diameter can be either the diameter of the remaining first roll 11 or the radius of the remaining first roll 11.

[0039] The first detection device 31 is a radar ranging device or a laser ranging device.

[0040] The radar ranging device measures distance by emitting electromagnetic waves and receiving the reflected signals. The emitted electromagnetic waves are reflected back after encountering the surface of the first roll 11 and are received by the receiving unit. By calculating the time difference between the emission and reception of the electromagnetic waves and combining it with the propagation speed of the electromagnetic waves, the distance from the surface of the first roll 11 to the radar ranging device can be calculated, and thus the outer diameter of the first roll 11 can be obtained.

[0041] The laser rangefinder calculates distance by emitting a laser beam and measuring the time it takes for it to travel from emission to reflection. By calculating the round-trip time difference between the laser beam reaching the outer surface of the remaining first roll 11 and the time difference, combined with the speed of light, the outer diameter of the first roll 11 can be accurately calculated. The laser beam has characteristics such as good directionality and concentrated energy, enabling accurate measurement of the distance from the surface of the first roll 11 to the laser rangefinder.

[0042] In practical applications, a suitable ranging device can be selected based on factors such as production needs, environmental conditions, and cost. Of course, other devices such as ultrasonic ranging devices, infrared ranging devices, and visual ranging devices can also be selected.

[0043] The second detection device 32 includes at least one area array vision camera spaced apart along the width direction of the first roll 11.

[0044] When the width of the first roll 11 is relatively narrow, a single area array vision camera can be selected and arranged in parallel with the first detection device 31 along the width direction of the first roll 11. When the width of the first roll 11 is relatively wide, multiple area array vision cameras can be selected and arranged at intervals along the width direction of the first roll 11 as needed. For example, multiple area array vision cameras can be arranged at equal intervals.

[0045] At least one area array vision camera is spaced apart along the width direction of the first roll 11 to ensure that the end area of ​​the roll can be fully covered. No matter where the roll end appears in the width direction, it can be captured by at least one area array vision camera, thereby accurately identifying the position of the roll end.

[0046] The second detection device 32 also includes a lighting device and an image processing device.

[0047] The lighting system provides suitable illumination for the area array vision camera, ensuring that high-quality, high-contrast images of the remaining first roll 11 can be acquired under various production environments. The lighting system typically uses LED light sources or other high-brightness, long-life light sources to uniformly illuminate the end area of ​​the roll and reduce shadows and reflections.

[0048] Specifically, the area array vision cameras and the lighting devices can be set up in a one-to-one correspondence, or all area array vision cameras can share a single lighting device.

[0049] The image processing device receives image data of the remaining first roll 11 acquired by the area array vision camera, and performs preprocessing, analysis, and recognition. Typically, the image processing device is equipped with advanced image processing algorithms and roll end recognition algorithms to accurately identify the position and shape of the roll end based on the image data of the remaining first roll 11.

[0050] The detection device 3 further includes a third detection device 33 disposed in the travel direction after the first roll 11 is unwound. The third detection device 33 is used to continuously detect the tension of the first roll 11 during its travel after unwound. By detecting the tension change of the first roll 11 after unwound, it is further determined whether the first roll 11 has reached the end position.

[0051] The third detection device 33 is set in the direction of travel of the first roll 11 after it is unwound. Specifically, the third detection device 33 can be set near the unwound position of the first roll 11, the position of the cutting device 6, or the position of the welding device 5 to ensure timely and accurate monitoring of the tension change of the first roll 11 after it is unwound during the travel of the roll.

[0052] Generally, during the unwinding process of the first roll 11, the outer diameter of the remaining first roll 11 gradually decreases as the unwinding process proceeds. Near the end of the roll, the tension usually increases and is accompanied by high-frequency vibration due to the significant reduction in the outer diameter of the remaining first roll 11.

[0053] This application uses a third detection device 33 to detect the tension change of the first roll 11 after unwinding, and further determines whether the first roll 11 has reached the end position. It works together with the first detection device 31 and the second detection device 32 to achieve high-precision end recognition, thus satisfying the high efficiency and high precision of end recognition.

[0054] Specifically, the first detection device 31 detects the outer diameter of the first roll 11 in real time. When the outer diameter of the first roll 11 decreases to a first value, the second detection device 32 is triggered. After the second detection device 32 is activated, it acquires images of the remaining first roll 11 and generates image data of the roll tail, such as the clarity, texture, or surface features of the detection mark on the roll tail. At the same time, the third detection device 33 detects the tension of the first roll 11 after unwinding. The tension data and the image data from the second detection device 32 are used together as data information to determine the roll tail. The image features such as the clarity and texture of the roll tail are correlated with features such as tension mutation and tension fluctuation frequency. Weights are assigned to different features to highlight the role of key features and suppress noise interference.

[0055] The image data from the second detection device 32 provides intuitive characteristics of the roll end of the first roll 11, while the tension data from the third detection device 33 reflects the dynamic behavior of the first roll 11. The combination of these two methods significantly reduces the misjudgment rate of the roll end of the first roll 11. In actual production, by setting up the image-based second detection device 32 and the tension-based third detection device 33, the accuracy of roll end recognition for the first roll 11 is increased from 90% to 99% through their collaborative analysis.

[0056] The third detection device 33 includes a tension sensor.

[0057] In an optional embodiment, the third detection device 33 includes a first tension sensor and a second tension sensor, which are respectively installed at two opposite ends of the roller in the direction of travel after the first roll 11 is unwound, and measure the tension of the first roll 11 at that position in real time.

[0058] By comparing the tension data detected by the first tension sensor and the second tension sensor, imbalance problems during the roll material transport process can be detected and addressed in a timely manner. At the same time, by placing the first tension sensor and the second tension sensor at both ends of the roller, the force on both sides of the first roll material 11 in the width direction can be kept uniform, preventing the unwinding of the first roll material 11 from being deviated due to the influence of the tension sensor on one end.

[0059] This application also provides a splicing device, including the aforementioned roll end detection device. The roll end detection device provides an early warning before the roll end arrives by real-time monitoring of the roll end image data and the tension data of the roll material after unwinding, ensuring that the splicing device has sufficient time to respond, thereby solving the problems of delayed response or inaccurate roll end judgment caused by traditional manual roll end detection.

[0060] It also includes a second roll 21 waiting to be unwound. When the first roll 11 is unwound to the end, the end of the first roll 11 is connected to the beginning of the second roll 21.

[0061] The splicing device monitors the remaining amount of the first roll 11 after unwinding in real time through the roll end detection device. When the first roll 11 is unwound to its end, it automatically completes the seamless splicing between the end of the first roll 11 and the beginning of the second roll 21. This solves the problem of downtime and reduced production efficiency caused by the depletion of a single roll in continuous roll production.

[0062] The splicing device further includes a welding device 5 arranged along the travel direction of the first roll 11 after unwinding, the welding device 5 being used to splice the tail of the first roll 11 to the head of the second roll 21.

[0063] The welding device 5 is installed on the travel path of the first coil 11 after it is unwound, and is driven by a servo motor or other drive device such as gears to achieve vertical and / or horizontal movement.

[0064] Specifically, the splicing device also includes a PLC control system. The second detection device 32 based on image vision and the third detection device 33 based on tension in the tail detection device transmit data to the PLC control system. When the PLC control system determines that the tail has arrived, it sends a tail arrival signal to the welding device 5 and synchronously triggers the welding device 5 to start.

[0065] In an optional embodiment, the welding device 5 includes an upper welding head 51 and a lower welding head 52 arranged opposite to each other, and the upper welding head 51 and the lower welding head 52 can move towards or away from each other in the vertical direction.

[0066] Before welding, the head of the second roll 21 is placed between the upper welding head 51 and the lower welding head 52 of the welding device 5 by vacuum adsorption or other adhesive methods. When the first roll 11 is unwound, the unwound roll of the first roll 11 also passes between the upper welding head 51 and the lower welding head 52.

[0067] When the end detection device determines that the first roll 11 has reached the end, it pauses the unwinding of the first roll 11 and starts the welding device 5 at the same time. The upper welding head 51 and the lower welding head 52 move synchronously toward each other, so that the upper welding head 51 and the lower welding head 52 close to clamp the end of the first roll 11 and the beginning of the second roll 21, thereby realizing the automatic splicing of the end of the first roll 11 and the beginning of the second roll 21.

[0068] The upper welding head 51 and the lower welding head 52 can move independently and / or synchronously to adapt to the welding of coils of different thicknesses, and there is no need to change the welding device 5 during the production process.

[0069] At the same time, the upper welding head 51 and the lower welding head 52 are welded simultaneously, which can effectively improve the welding speed and save the time of changing rolls in the production process.

[0070] The splicing device also includes a cutting device 6, which is used to cut the first roll 11 after the first roll 11 and the second roll 21 are spliced.

[0071] Along the unwinding direction of the first roll 11, the cutting device 6 is positioned upstream of the welding device 5, that is, after the first roll 11 is unwound, the roll passes through the cutting device 6 and the welding device 5 in sequence.

[0072] The end-of-roll detection device (vision + tension sensor) sends an end-of-roll arrival signal to the cutting device 6 via the PLC. The PLC sends a start signal to the welding device 5, and the upper welding head 51 and the lower welding head 52 close, clamping the end of the first roll 11 and the beginning of the second roll 21 to achieve the welding action. After welding is completed, the cutting device 6 descends vertically. When it reaches the height of the first roll 11, the cutting device 6 moves along the width direction of the first roll 11 to separate the end of the first roll 11 from the roll.

[0073] The spool is the central portion of the first roll 11 and / or the second roll 21 to facilitate the winding of film materials.

[0074] The connecting device also includes a storage assembly, which includes a floating roller 71 that can move up and down.

[0075] The floating roller 71 is located on the travel path of the first roll 11 and / or the second roll 21 after unwinding, specifically downstream of the welding device 5. The floating roller 71 is driven to rise and fall in the vertical direction by a servo motor or a cylinder. The servo motor drives the floating roller 71 to rise and fall in the vertical direction through a ball screw, or the cylinder drives the floating roller 71 to rise and fall in the vertical direction through a linear guide rail.

[0076] In one embodiment, 1-4 fixed guide rollers 72 are arranged upstream and downstream of the floating roller 71 to form a winding S-shaped roll path, with a maximum material storage capacity of 5-30m.

[0077] Specifically, during the production process, when the detection device 3 detects that the first roll 11 has reached the end of the roll, the floating roller 71 slowly rises under the drive of a servo motor or cylinder to release the roll between the floating roller 71 and the fixed guide roller 72, replenishing the roll required by the downstream equipment and preventing the downstream equipment from stopping when the end of the first roll 11 is joined to the beginning of the second roll 21. After the end of the first roll 11 and the beginning of the second roll 21 are welded, the floating roller 71 descends to lengthen the length of the roll between the floating roller 71 and the fixed guide roller 72 to match the roll requirements of the downstream equipment. The floating roller 71 can also buffer the large tension impact generated when the material of the first roll 11 reaches the end of the roll, preventing the material of the first roll 11 from being pulled off the roll.

[0078] The splicing device further includes a first unwinding device 1 for loading the first roll 11, a second unwinding device 2 for loading the second roll 21, and a rotating structure 4. The first unwinding device 1 and the second unwinding device 2 are disposed at opposite ends of the rotating structure 4. The rotating structure 4 rotates around its center to exchange the positions of the first unwinding device 1 and the second unwinding device 2.

[0079] The first unwinding device 1 and the second unwinding device 2 are located at opposite ends of the rotating structure 4, forming a 180° symmetrical distribution.

[0080] Before the end of the first roll 11 is joined to the beginning of the second roll 21, the beginning of the second roll 21 is positioned at the welding device 5. The detection device 3 detects that the first roll 11 has reached the end, and the welding device 5 is activated sequentially to complete the joining of the end of the first roll 11 and the beginning of the second roll 21. Then, the cutting device 6 descends and moves along the width direction of the first roll 11 to separate the end of the first roll 11 from the roll. Then, the rotating structure 4 rotates 180° to exchange the positions of the first unwinding device 1 and the second unwinding device 2. At the same time, the second roll 21 begins to unwind continuously, realizing the efficient switching between the first roll 11 and the second roll 21.

[0081] The first unwinding device 1 and the second unwinding device 2 interchange positions via a rotating structure 4. When the first roll 11 is being produced, the second roll 21 can be loaded onto the second unwinding device 2 simultaneously without affecting the normal unwinding of the first roll 11. After the end of the first roll 11 is connected to the beginning of the second roll 21, the rotating mechanism causes the first unwinding device 1 and the second unwinding device 2 to interchange positions. The second unwinding device 2 then performs the normal unwinding process. At the same time, the remaining roll of the first roll 11 in the first unwinding device 1 is disassembled and a new roll is installed. This effectively shortens the roll changing time during the re-production process of the splicing device and eliminates the need for additional conveying paths for the first roll 11 and the second roll 21, effectively saving space occupied by the splicing device.

[0082] This application relates to a roll end detection device and a splicing device. The roll end detection device includes a first roll 11 being unwound and a detection device 3. The detection device 3 is positioned in the direction of travel of the first roll 11 after unwinding. The detection device 3 includes a first detection device 31 and a second detection device 32. The first detection device 31 is used to detect the outer diameter of the remaining first roll 11 after unwinding. When the outer diameter reaches a first value, the second detection device 32 is activated to acquire an image of the remaining first roll 11 and identify the roll end of the first roll 11. This application activates the second detection device 32 to identify the image of the remaining first roll 11 and identify the roll end when the roll is about to reach the roll end, effectively reducing unnecessary resource consumption and improving resource utilization efficiency. At the same time, by using the accurate monitoring of the outer diameter by the first detection device 31 to trigger the second detection device 32, it is ensured that the second detection device 32 is activated when it is about to reach the roll end, accurately acquiring an image containing roll end features, thereby achieving high-precision roll end recognition and meeting the requirements of high efficiency and high precision in roll end recognition.

[0083] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "specifically," or "optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0084] This application has been described with reference to the above-described embodiments; however, these embodiments are merely examples for implementing this application. It must be noted that the disclosed embodiments do not limit the scope of this application. Any modifications and refinements made without departing from the spirit and scope of this application are within the scope of patent protection of this application.

Claims

1. A device for detecting curled tails, characterized in that, Including the first roll of material being unwound (11) and the detection device (3): The detection device (3) is positioned in the direction of travel of the first roll (11) after it is unwound; The detection device (3) includes a first detection device (31) and a second detection device (32). The first detection device (31) is used to detect the outer diameter of the remaining first roll (11) after unwinding. When the outer diameter reaches a first value, the second detection device (32) is activated to acquire an image of the remaining first roll (11) and identify the end of the first roll (11).

2. The tail detection device according to claim 1, characterized in that, The first detection device (31) is a radar ranging device or a laser ranging device.

3. The tail detection device according to claim 1, characterized in that, The second detection device (32) includes at least one area array vision camera spaced apart along the width direction of the first roll (11).

4. The tail detection device according to claim 1, characterized in that, The detection device (3) further includes a third detection device (33) disposed in the travel direction after the first roll (11) is unwound, the third detection device (33) being used to continuously detect the tension of the first roll (11) after unwound.

5. A connecting device, characterized in that, Includes the tail detection device according to any one of claims 1-4 above.

6. The splicing device according to claim 5, characterized in that, It also includes a second roll (21) waiting to be unwound. When the first roll (11) is unwound to the end, the end of the first roll (11) is connected to the beginning of the second roll (21).

7. The splicing device according to claim 6, characterized in that, The splicing device further includes a welding device (5) arranged along the travel direction of the first roll (11) after unwinding, the welding device (5) being used to splice the tail of the first roll (11) to the head of the second roll (21).

8. The splicing device according to claim 6, characterized in that, The splicing device also includes a cutting device (6). After the first roll (11) and the second roll (21) are spliced, the cutting device (6) is used to cut the first roll (11).

9. The connecting device according to claim 5, characterized in that, The connecting device also includes a storage assembly, which includes a floating roller (71) that can move up and down.

10. The splicing device according to claim 6, characterized in that, The splicing device further includes a first unwinding device (1) for loading the first roll (11), a second unwinding device (2) for loading the second roll (21), and a rotating structure (4). The first unwinding device (1) and the second unwinding device (2) are disposed at opposite ends of the rotating structure (4). The rotating structure (4) rotates around its center to exchange the positions of the first unwinding device (1) and the second unwinding device (2).

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