Visual identification deviation correction system and printing machine

Abstract

The invention relates to the technical field of printing machine deviation correction, in particular to a visual identification deviation correction system and a printing machine, the deviation correction system comprises a rack and a conveying mechanism arranged in the rack, and a printing assembly is arranged above the rack; a detection mechanism is arranged in the rack and comprises a base; a detection unit, a light source and a first visual identification unit are arranged on the base; the tension change of the coiled material is monitored in real time through the detection unit, and the signal reflecting the tension change is transmitted to the light source, so that the light coverage area can correspondingly change along with the tension change of the coiled material, and the fine tension change of the coiled material is converted into the more obvious change of the light shielding area; therefore, the first visual identification unit can more accurately capture the position deviation of the edge of the coiled material, and the detection sensitivity and the identification precision of the deviation correction system on the tiny deviation of the coiled material are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of printing press deviation correction, in particular to a visual recognition deviation correction system and a printing press. Background Art

[0002] When a printing press prints a web at high speed, the web needs to undergo multiple roller transmission and drying processes. During this process, the heat generated by the friction and compression of the rollers and the high temperature environment of the drying process will be continuously transferred to the web through the rollers, causing the web to produce significant temperature-sensitive deformation, which makes it easy for the edge of the web to form wavy burrs. In addition, during high-speed printing, the printing press needs to correct the offset of the web. The correction system used in the existing technology is mostly implemented through photoelectric sensors, but it is very easy to make errors. Moreover, when the web is deformed due to high temperature, it is difficult for the correction system to detect it, which can easily lead to false detection.

[0003] For example, Chinese patent authorization announcement number CN206335997U discloses an automatic web-correcting device, a web guide machine, and an inkjet printer. This patent realizes basic web-correcting control of the media position through the coordination of a transmission mechanism, a detection mechanism, and a web-correcting mechanism. However, it only focuses on the real-time detection and mechanical adjustment of the physical position of the web, such as monitoring edge offset through a photoelectric switch and correcting the trajectory using the mechanical force of a web-correcting roller. This patent does not address the problem of false detection or failure to identify when the web is deformed due to temperature. The detection mechanism can only sense the geometric position deviation of the web edge and cannot identify changes and offsets in the web caused by temperature deformation. Summary of the Invention

[0004] To address the above-mentioned problems, a visual recognition and correction system and a printing press are provided, which monitor the tension changes of the web in real time through a detection unit, and transmit a signal reflecting the tension change to the light source, so that the light coverage area can change accordingly with the tension change of the web, thereby converting the subtle tension changes of the web into more obvious changes in the light blocking area, making it easier for the first visual recognition unit to more accurately capture the position deviation of the edge of the web, and significantly improving the detection sensitivity and recognition accuracy of the correction system for slight deviations of the web.

[0005] In order to solve the problems of the existing technology, the present invention provides a visual recognition and correction system, including a frame and a conveying mechanism arranged in the frame, the conveying mechanism including a conveying roller for conveying a roll and a correction roller for adjusting the position of the roll; a printing component that can move back and forth along the axial direction of the roller and print on the roll is arranged above the frame; a detection mechanism is arranged in the frame, the detection mechanism including a base that can move along the axial direction of the roller; a detection unit for real-time monitoring of the tension change of the roll and a rotatable light source are arranged on the base; the light source can emit light to the edge area of ​​the roll, receive a control signal from the detection unit, and adjust the rotation angle of the light according to the control signal; a first visual recognition unit that can collect light signal data blocked by the edge of the roll is arranged above the light source on the base.

[0006] Preferably, the detection unit is a distance sensor, and a piezoelectric motor electrically connected to the distance sensor is provided on the base. The piezoelectric motor can drive the light source to rotate according to the detection signal of the distance sensor to adjust the lighting angle.

[0007] Preferably, the detection unit includes a mounting seat arranged on the base, the mounting seat is provided with a support rod that is threadedly engaged with the mounting seat, the support rod is an elastic and retractable structure, and a roller is provided on the end of the support rod away from the mounting seat, and the roller is in contact with the coil.

[0008] Preferably, a pulley is provided on the end of the support rod away from the roller, the light source is rotatably arranged above the support rod, and a slide groove extending along the height direction is provided on the side of the light source close to the support rod, and the pulley is slidably arranged in the slide groove.

[0009] Preferably, the mounting seat is rotatably mounted on the base, and the base is provided with a screw that can fix the mounting seat.

[0010] Preferably, there are two detection mechanisms, which are located at two ends of the frame in a mirror-image state.

[0011] Preferably, the printing assembly is further provided with a second visual recognition unit, which includes a support frame fixedly connected to the side of the printing assembly and a visual camera provided on the support frame.

[0012] Preferably, a temperature sensor for identifying the temperature of the coil is also provided on the base.

[0013] Preferably, the conveying roller is provided with a hollow structure, and a spiral cooling channel is provided inside the conveying roller.

[0014] A printing press comprises the above-mentioned visual recognition and correction system.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses a detection unit to monitor changes in web tension in real time and transmits a signal reflecting the tension change to a light source. After receiving this control signal, the light source adjusts the rotation angle of the illumination so that the light coverage area changes accordingly with changes in web tension. The detection unit, the first visual recognition unit, and the light source work together to create a highly sensitive edge detection system. This enables the system to accurately identify tiny deviations that are difficult to detect with traditional solutions, significantly improving the detection sensitivity and recognition accuracy of the edge position of high-speed moving webs, ensuring stable transmission and precise processing of webs under complex working conditions.

[0016] 2. This invention uses a rotating light source to amplify tension changes on the web's surface, converting minute temperature-induced deformations into quantifiable image features (such as the periodic frequency of the ripples). This allows the back-end controller to accurately distinguish edge ripples caused by thermal expansion from flash caused by mechanical stress, and subsequently adjust the web correction strategy. This high-precision recognition of temperature-sensitive deformations enables the system to maintain stable web correction accuracy even in high-temperature, high-speed printing environments, significantly improving the yield rate of web processing under complex working conditions.

[0017] 3. This invention uses a second visual recognition unit to align with the printing area and collect real-time information about the overprint quality of the web's surface. It also simultaneously monitors the projection of the light source emitted by the detection unit onto the web's surface. This allows for a recheck of the signal detected by the first recognition unit. If the light source's angle shifts or intensity decreases, the backend control system is immediately triggered to adjust the web's offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the visual recognition correction system.

[0019] Figure 2 This is the front view of the visual recognition and correction system.

[0020] Figure 3 It is a three-dimensional structural diagram of the frame, conveying mechanism and detection mechanism of the visual recognition and correction system.

[0021] Figure 4 It is a cross-sectional schematic diagram of the three-dimensional structure of the frame, conveying mechanism and detection mechanism of the visual recognition and correction system.

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the frame, conveying mechanism and detection mechanism of the visual recognition and correction system.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the detection mechanism in the first embodiment of the visual recognition correction system.

[0024] Figure 7It is a side view of the rotating light source of the detection mechanism in the second embodiment of the visual recognition correction system.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the detection mechanism in the second embodiment of the visual recognition correction system.

[0026] Figure 9 It is an exploded view of the detection mechanism in the second embodiment of the visual recognition and correction system.

[0027] Figure 10 It is a schematic diagram of the cross-sectional structure of the conveyor roller of the visual recognition and correction system.

[0028] The numbers in the figure are: 1. Frame; 11. Conveying mechanism; 111. Conveying roller; 1111. Cooling channel; 112. Correcting roller; 12. Printing assembly; 121. Second visual recognition unit; 1211. Support frame; 1212. Visual camera; 2. Detection mechanism; 21. Base; 211. Detection unit; 2111. Distance sensor; 2112. Mounting seat; 21121. Support rod; 21122. Roller; 21123. Pulley; 21124. Screw; 212. Light source; 2121. Piezoelectric motor; 2122. Slide; 213. First visual recognition unit; 214. Temperature sensor; 3. Coil. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 5 As shown: a visual recognition and correction system includes a frame 1 and a conveying mechanism 11 arranged in the frame 1, the conveying mechanism 11 includes a conveying roller 111 for conveying the web 3 and a correction roller 112 for adjusting the position of the web 3; a printing component 12 is arranged above the frame 1, which can move back and forth along the axial direction of the roller and print on the web 3; a detection mechanism 2 is arranged in the frame 1, and the detection mechanism 2 includes a base 21 that can move along the axial direction of the roller; a detection unit 211 for real-time monitoring of the tension change of the web 3 and a rotatable light source 212 are arranged on the base 21; the light source 212 can emit light to the edge area of ​​the web 3, receive a control signal from the detection unit 211, and adjust the rotation angle of the light according to the control signal; a first visual recognition unit 213 is arranged on the base 21 above the light source 212, which can collect light signal data blocked by the edge of the web 3.

[0031] The conveying mechanism 11 in the rack 1 drives the coil material 3 to convey along a predetermined direction by the conveying roller 111, and the printing assembly 12 above the rack 1 reciprocates along the roller shaft axis direction to perform printing operation on the surface of the conveying coil material 3.

[0032] The detection mechanism 2 in the rack 1 synchronously moves the detection unit 211, the light source 212 and the first visual recognition unit 213 by the base 21 movable along the roller shaft axis, so that the detection mechanism 2 can adapt to coil materials 3 of different widths, and ensure that the detection range is dynamically adjusted according to the width of the coil material 3, thereby significantly improving the versatility of the equipment in diversified production scenarios and reducing the changeover debugging time.

[0033] The detection unit 211 monitors the tension change of the coil material 3 in real time, and transmits a signal reflecting the tension change to the light source 212. After receiving the control signal, the light source 212 adjusts the rotation angle of the light, so that the light coverage area can change accordingly with the tension change of the coil material 3. When the tension of the coil material 3 changes slightly, the adjustment of the angle of the light source 212 will cause the amplification effect of the irradiation position and range of the light on the edge of the coil material 3. This amplification effect converts the original slight tension change into a more obvious change in the light blocking area, which facilitates the first visual recognition unit 213 to more accurately capture the position deviation of the edge of the coil material 3, and significantly improves the detection sensitivity and recognition accuracy of the correction system to the slight deviation of the coil material 3. By converting the tension change into a quantifiable optical signal change, the correction system realizes high-precision detection of the deviation of the coil material 3, and enhances the stability and reliability of the system in a high-speed running environment.

[0034] At this time, the first visual recognition unit 213 above the light source 212 collects the light signal data blocked by the edge of the coil material 3, obtains the position information of the edge of the coil material 3 by analyzing such data, and determines the transverse deviation of the coil material 3. The controller at the rear end integrates the tension data of the detection unit 211 and the deviation data of the first visual recognition unit 213, generates a correction control signal after processing, and drives the correction roller 112 to act, thereby realizing accurate adjustment of the position of the coil material 3.

[0035] Compared with the traditional fixed light source 212 scheme, which can only detect obvious position deviation and is helpless for hidden defects caused by thermal deformation, the dynamic light source 212 of the present application can amplify the tension change on the surface of the coil material 3 by rotation, and convert the slight deformation caused by temperature into quantifiable image features (such as the period frequency of the corrugation). The controller at the rear end can accurately distinguish the edge corrugation caused by thermal expansion from the flash caused by mechanical stress, and then adjust the correction strategy. This high-precision recognition capability for temperature-sensitive deformation enables the system to maintain stable correction accuracy in a high-temperature and high-speed printing environment, thereby significantly improving the yield of the coil material 3 processing under complex working conditions.

[0036] As Figures 1 to 6As shown: the detection unit 211 is a distance sensor 2111, and a piezoelectric motor 2121 electrically connected to the base 21 is provided. The piezoelectric motor 2121 can drive the light source 212 to rotate according to the detection signal of the distance sensor 2111 to adjust the lighting angle.

[0037] First embodiment: When web 3 undergoes slight deflection or deformation due to tension fluctuations, distance sensor 2111 detects the change in the distance between the web 3's surface and itself in real time and transmits this signal to piezoelectric motor 2121. Piezoelectric motor 2121 drives light source 212 to rotate, causing the light's irradiation position and range at the web 3's edge to amplify as the light source 212's angle adjusts. This amplifies the slight distance variation caused by tension fluctuations, transforming the light's irradiation area into a more significant change through the rotation of light source 212. For example, when the web 3's edge deflects a small distance due to tension fluctuations, the lateral coverage area of ​​the light will change several times the amount of the offset, converting the subtle tension signal into an optical signal difference that can be easily captured by the visual recognition unit. By analyzing this amplified optical signal data, first visual recognition unit 213 can more clearly distinguish the dynamic characteristics of the web 3's edge and accurately calculate the offset.

[0038] By amplifying the tension fluctuation signal by adjusting the angle of the light source 212, the system's detection sensitivity to tiny changes in the edge of the web 3 is significantly improved. Even slight tension fluctuations can be identified through obvious changes in the optical signal, effectively avoiding the problem of missed detection caused by weak signals in the traditional fixed light source 212 solution; the direct connection between the angle adjustment of the light source 212 and the tension fluctuation makes the detection process more in line with the physical mechanism of the deformation of the web 3, and enhances the rationality and reliability of the detection logic; the amplified optical signal provides the visual recognition unit with clearer edge feature information, reduces algorithm misjudgment caused by signal ambiguity, and improves the accuracy of offset calculation; at the same time, this method of achieving signal amplification through optical angle adjustment does not require the addition of complex mechanical or electronic amplification components, reduces hardware costs while simplifying the system structure, maintains the compactness and stability of the detection mechanism 2, and facilitates integrated application in printing equipment.

[0039] like Figures 1 to 5 and Figures 7 to 9 As shown: the detection unit 211 includes a mounting base 2112 arranged on the base 21, and the mounting base 2112 is provided with a support rod 21121 that is threadedly engaged with it. The support rod 21121 is an elastic and retractable structure. A roller 21122 is provided on the end of the support rod 21121 away from the mounting base 2112, and the roller 21122 is in contact with the coil 3.

[0040] Second Embodiment: When the web 3 experiences lateral deflection or fluctuations due to tension changes during transport, the roller 21122 in contact with the surface of the web 3 will shift accordingly with the position of the web 3. Because the support rod 21121 is an elastically retractable structure, the displacement of the roller 21122 causes the support rod 21121 to elastically deform, with the degree of deformation proportional to the tension in the web 3. Furthermore, by rotating the support rod 21121, which is threadedly engaged with the mounting base 2112, its axial extension can be adjusted, thereby adjusting the initial contact pressure between the roller 21122 and the web 3 to accommodate webs 3 of varying thickness or material. This structure enables the detection unit 211 to convert the tension changes in the web 3 into elastic deformation signals of the support rod 21121 in real time. This signal is then converted into an electrical signal by subsequent circuitry and transmitted to the control system, providing a basis for angle adjustment and deviation correction control of the light source 212.

[0041] The integrated setting of thread adjustment and elastic expansion and contraction simplifies the structure, reduces the number of parts, and reduces the manufacturing cost and maintenance difficulty; the elastically expandable support rod 21121 can automatically adapt to the slight fluctuations on the surface of the coil 3, maintain the stable contact between the roller 21122 and the coil 3, and improve the stability and reliability of tension detection; the thread adjustment method can quickly adapt to coils 3 of different thicknesses, expanding the scope of application of the system; the rolling contact method between the roller 21122 and the coil 3 avoids the surface damage of the coil 3 that may be caused by sliding friction, and is suitable for high-precision printing and processing of sensitive materials.

[0042] like Figures 1 to 5 and Figures 7 to 9 As shown: a pulley 21123 is provided on the end of the support rod 21121 away from the roller 21122, the light source 212 is rotatably arranged above the support rod 21121, and a slide groove 2122 extending along the height direction is provided on the side of the light source 212 close to the support rod 21121, and the pulley 21123 is slidably arranged in the slide groove 2122.

[0043] When the tension of the web 3 changes, causing roller 21122 to shift with the undulations of the web 3's surface, the support rod 21121 connected to roller 21122 undergoes elastic expansion and contraction, driving the pulley 21123 at its end to slide within the slot 2122 of the light source 212. Because the slot 2122 extends vertically, the sliding of pulley 21123 forces the light source 212 to change its angle around its pivot point, altering the angle and position of light projected onto the edge of the web 3. This rotation amplifies the difference in optical signals corresponding to the tension change. The tiny displacement of the web 3's edge caused by the tension fluctuation is transformed into a more significant light-shadow boundary displacement or gradient change in light intensity through the rotation of the light source 212, enabling the visual recognition unit to capture subtle edge features that are difficult to discern with a traditional fixed light source 212.

[0044] Through the mechanical linkage of the pulley 21123 and the sliding groove 2122, the automatic adjustment of the angle of the light source 212 with the change of the tension can be realized without additional electronic control elements. The mechanical transmission characteristics are used to convert the small tension signal of the coiled material 3 into an amplified optical signal change, which significantly improves the detection sensitivity of the system to subtle edge fluctuations. This physical quantity amplification mechanism simplifies the structure of the correction system, reduces the cost and maintenance difficulty, and avoids the signal delay or distortion problems that may exist in electronic elements. The continuity of the rotation of the light source 212 makes the optical signal amplification process smooth and stable, providing clearer edge feature data for visual recognition and effectively improving the accuracy of the offset calculation.

[0045] As shown in Figures 1 to 5 and Figures 7 to 9 : The mounting seat 2112 is rotatably mounted on the base 21, and the base 21 is provided with a screw 21124 capable of fixing the mounting seat 2112.

[0046] The mounting seat 2112 is rotatably mounted on the base 21 by a bearing (not shown in the figure) to adjust the azimuth angle of the detection unit 211. The screw 21124 provided on the base 21 and threadedly matched therewith can directly abut the mounting seat 2112 against the base 21. When it is necessary to adjust the detection position, the screw 21124 is loosened to disengage the mounting seat 2112 from the close abutment, and the mounting seat 2112 is manually rotated to align the detection unit 211 with the target detection area of the coiled material 3. After the adjustment is completed, the screw 21124 is tightened to fix the rotation angle of the mounting seat 2112 by using the friction force, so that the mounting seat 2112 will not be displaced due to vibration or movement of the coiled material 3 during the detection process. The above-mentioned mode makes the azimuth adjustment of the detection unit 211 flexible, and the detection position can be quickly adjusted according to the width, edge shape or detection requirement of the coiled material 3, thereby improving the adaptability of the correction system to different specifications of the coiled material 3. The above-mentioned mode significantly simplifies the equipment debugging process, shortens the preparation time during the change of production, improves the efficiency and convenience of industrial production, and is especially suitable for complex scenes of co-linear production of multi-specification coiled materials 3.

[0047] As shown in Figures 1 to 3 : The detection mechanism 2 has two, and the two detection mechanisms 2 are in mirror image state and located at the two ends of the rack 1, respectively.

[0048] The two detection mechanisms 2 are distributed at both ends of the frame 1 in a mirror-symmetrical manner, realizing synchronous real-time detection of the edges or surface features on both sides of the coil 3. When the coil 3 deviates laterally during high-speed transportation, the detection mechanisms 2 on both sides synchronously collect the position offset signals of the left and right edges and transmit the data to the control system in real time. By analyzing the difference in data on both sides, the controller can accurately determine the offset direction of the coil 3 and quantify the offset amplitude, thereby driving the correction roller 112 to dynamically adjust the tension of the corresponding area of ​​the coil 3. This symmetrical layout ensures the mutual verification of the detection signals, avoids misjudgment caused by unilateral sensor errors or local interference, and enables the correction system to accurately capture the overall lateral movement trend of the coil 3. It significantly improves the reliability of the system's detection of coil 3 offset, especially when dealing with complex working conditions such as unilateral tension fluctuations and local thermal deformation, and can effectively filter out unilateral signal interference and reduce the false detection rate.

[0049] The linear guide rails and high-precision sliders at each end of the frame 1 form a sliding guide structure, allowing the detection mechanism 2 to slide smoothly along the axis of the conveyor roller 111. A slider fixed to the bottom of each detection mechanism 2 precisely mates with the guide rail, and in conjunction with a servo motor or ball screw drive assembly, fine-tunes the position of the detection mechanism 2. To accommodate webs 3 of varying widths or calibrate the detection position, the drive system precisely controls the synchronous or independent sliding of the detection mechanisms 2 at each end of the frame 1, ensuring that the detection unit 211 is always aligned with the target detection area on both sides of the web 3.

[0050] like Figure 1 and Figure 2 As shown, the printing assembly 12 is further provided with a second visual recognition unit 121 , which includes a support frame 1211 fixedly connected to the side of the printing assembly 12 and a visual camera 1212 provided on the support frame 1211 .

[0051] A support frame 1211 fixed to the side of the printing assembly 12 provides a stable mounting base for the visual camera 1212, allowing it to both align with the printing area and capture the overprint quality of the image and text on the surface of the web 3 in real time, while also simultaneously monitoring the projection of the light source 212 emitted by the detection unit 211 onto the surface of the web 3. When the light source 212 of the detection unit 211 illuminates the edge or characteristic area of ​​the web 3, the visual camera 1212, as it moves with the printing assembly 12 to the edge of the web 3, captures the position of the light band formed by the light source 212, the brightness uniformity, and the light and shadow contrast of the edge contour. The visual camera 1212 compares these projection signals of the light source 212 with preset standard parameters, thereby rechecking the signal detected by the first recognition unit. If the light source 212 is detected to have vibrated, changed in temperature, or experienced angular displacement or light intensity attenuation, the control system immediately triggers the back-end control system to adjust the offset of the web 3.

[0052] By re-inspecting the light source 212 of the detection unit 211, a closed-loop monitoring mechanism for the optical detection system is established to avoid misjudgment of edge position due to drift of the light source 212 and reduce the false detection rate of the correction system. The visual camera 1212 simultaneously undertakes the dual functions of printing quality detection and light source 212 status monitoring, which expands the detection function without increasing hardware costs and improves the system integration. The status of the light source 212 can be fed back immediately, so that the correction system can dynamically compensate for the impact of environmental changes on optical detection and ensure the consistency of edge detection accuracy during high-speed printing; working in conjunction with the printing pattern recognition function, the second visual recognition unit 121 can not only monitor the quality of graphic overprinting, but also ensure the reliability of the light source 212 of the front-end detection mechanism 2, forming a full-link quality control from light source to image recognition, which significantly enhances the system's anti-interference ability and long-term operation stability in complex industrial environments.

[0053] like Figures 4 to 9 As shown, a temperature sensor 214 for identifying the temperature of the coil 3 is also provided on the base 21 .

[0054] When the substrate undergoes thermal expansion or contraction due to factors such as printing drying or ambient temperature fluctuations, the temperature sensor 214 can instantly capture the temperature change trend. The back-end control system uses this temperature compensation data to synchronously adjust the transport speed of the conveyor mechanism 11, avoiding detection errors or delayed correction caused by thermal deformation.

[0055] Through real-time temperature monitoring, the correction system can adapt to the changes in the thermal physical properties of the coil 3 at different process stages, and reduce the error rate of edge offset detection caused by temperature; the linkage mechanism between temperature data and the detection mechanism 2 enables the correction system to change from passive response to offset to active prediction and compensation. For example, before the coil 3 enters the high-temperature drying section, the light source and tension parameters are adjusted in advance according to the preset temperature curve, thereby improving the correction control accuracy under complex working conditions; the temperature sensor 214 and the existing detection mechanism 2 can work together to form a multi-dimensional data fusion detection system, which enhances the correction system's ability to trace and analyze the causes of deformation of the coil 3, facilitates operators to adjust process parameters in a targeted manner, reduces batch quality problems caused by temperature abnormalities, and improves the stability of industrial production and the yield rate of finished products.

[0056] like Figures 1 to 3 and Figure 10 As shown, the conveying roller 111 is provided with a hollow structure, and a spiral cooling channel 1111 is provided inside the conveying roller 111 .

[0057] One end of cooling channel 1111 is connected to an external cooling system (such as a chiller or air compressor) via a rotary joint, while the other end is sealed to form a closed circulation loop. When conveyor roller 111 rotates at high speed, the cooling system pumps the cooling medium into cooling channel 1111, driven by a pump. Due to the spiral shape of cooling channel 1111, the cooling medium propels along the spiral cooling channel 1111, forcing convection heat exchange between the roller wall of conveyor roller 111 and the surface of web 3. Concurrently, heat generated by printing, drying, friction, and other factors on web 3 is absorbed by conveyor roller 111. The spiral cooling channel 1111 creates a continuous and uniform cooling path for the cooling medium within conveyor roller 111, extending heat exchange time and enhancing the ability to control the surface temperature of conveyor roller 111. This ensures that web 3 maintains a constant temperature during conveyance, preventing deformation, adhesion, or chemical property changes caused by high temperatures. This further improves the reliability and process adaptability of web 3 printing under complex working conditions.

[0058] The hollow structure of the conveying roller 111 provides space for installing the cooling channel 1111. The hollow roller structure reduces its own weight while ensuring strength, thereby reducing the load energy consumption of the driving motor.

[0059] A printing press comprises the above-mentioned visual recognition and correction system.

[0060] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A visual recognition and correction system, comprising a frame and a conveying mechanism disposed within the frame, wherein the conveying mechanism comprises a conveying roller for conveying the coil and a correction roller for adjusting the position of the coil; A printing assembly is provided above the frame and can move back and forth along the axis of the roller and print on the roll; it is characterized in that: A detection mechanism is provided in the frame, and the detection mechanism includes a base that can move along the axis direction of the roller; The base is provided with a detection unit for real-time monitoring of the tension change of the coil and a rotatable light source; The light source can emit light to the edge area of ​​the web, receive a control signal from the detection unit, and adjust the rotation angle of the light according to the control signal; A first visual recognition unit capable of collecting light signal data blocked by the edge of the coil is arranged on the base above the light source.

2. The visual recognition and correction system according to claim 1, characterized in that: The detection unit is a distance sensor, and a piezoelectric motor electrically connected to the distance sensor is provided on the base. The piezoelectric motor can drive the light source to rotate according to the detection signal of the distance sensor to adjust the lighting angle.

3. The visual recognition and correction system according to claim 1, characterized in that: The detection unit includes a mounting seat arranged on the base, the mounting seat is provided with a support rod that is threadedly matched with it, the support rod is an elastic and retractable structure, and a roller is provided on the end of the support rod away from the mounting seat, and the roller is in contact with the coil.

4. The visual recognition and correction system according to claim 3, characterized in that: A pulley is provided on the end of the support rod away from the roller, the light source is rotatably arranged above the support rod, and a slide groove extending along the height direction is provided on the side of the light source close to the support rod, and the pulley is slidably arranged in the slide groove.

5. The visual recognition and correction system according to claim 3, characterized in that: The mounting seat is rotatably mounted on the base, and the base is provided with a screw rod which can fix the mounting seat.

6. The visual recognition and correction system according to claim 1, characterized in that: There are two detection mechanisms, which are located at two ends of the frame in a mirror image state.

7. The visual recognition and correction system according to claim 6, characterized in that: The printing assembly is also provided with a second visual recognition unit, which includes a support frame fixedly connected to the side of the printing assembly and a visual camera provided on the support frame.

8. The visual recognition and correction system according to any one of claims 1 to 7, characterized in that: A temperature sensor for identifying the temperature of the coil is also provided on the base.

9. The visual recognition and correction system according to any one of claims 1 to 7, characterized in that: The conveying roller is provided with a hollow structure, and a spiral cooling channel is provided inside the conveying roller.

10. A printing press, characterized in that: It comprises a visual recognition and correction system as described in any one of claims 1 to 9.

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