A kind of deviation rectifying device based on the principle of occlusion

Abstract

The present application provides a kind of deviation rectifying device based on the principle of blocking, including the first infrared detection unit and the second infrared detection unit being arranged in the feeding port of winding equipment two sides, deviation rectifying unit being arranged in the first infrared detection unit and / or the second infrared detection unit one side and control unit, the first infrared detection unit and the second infrared detection unit respectively include the first infrared diode and the first infrared diode for emitting infrared light, first photodiode and second photodiode for detecting the infrared light, the first connecting line and the second connecting line are respectively aligned with the two side edges of the coil entering the feeding port, the control unit controls the position of the coil by the first photodiode and the second photodiode detected radiation power to fine tune the deviation rectifying unit, can realize low cost high-precision deviation rectification.

Description

Technical Field

[0001] This invention relates to the field of industrial technology, and in particular to a correction device based on the principle of beam blocking. Background Technology

[0002] In some industrial manufacturing systems, web alignment is a key technical aspect, requiring the application of web alignment technology to maintain product flatness and consistency during production. This is particularly true in the manufacturing of roll-to-roll products, where the flatness of the roll edges is a core element reflecting product quality. Even minor deviations in the roll's position during production can accumulate and amplify, leading to product defects. Existing technologies include various types of web alignment techniques, with commonly used methods employing visual sensors, ultrasonic sensors, or infrared sensors. While web alignment using visual sensors (such as CCD sensors) or ultrasonic sensors offers significant advantages in terms of performance, it is relatively expensive. Web alignment using infrared sensors is not only cheaper but also has simpler circuit and programming designs, making it the preferred choice for current applications. The most common infrared polarization correction scheme currently is to use infrared diodes and photodiodes as infrared signal transmitters and receivers respectively to form an infrared optical path to achieve polarization correction. The improvement of detection accuracy depends on the increase of diode mounting density. However, since the size of infrared diodes is difficult to compress, and for non-edge-mounted detection devices, excessively dense diodes can easily interfere with photodiodes in adjacent positions, thus reducing detection accuracy. Summary of the Invention

[0003] Based on the above-mentioned problems, this invention proposes a correction device based on the principle of beam blocking, which can achieve high-precision correction at low cost.

[0004] In view of this, the present invention proposes a web correction device based on the principle of beam blocking, comprising a first infrared detection unit and a second infrared detection unit disposed on both sides of the feed inlet of the winding equipment, a web correction unit disposed on one side of the first infrared detection unit and / or the second infrared detection unit, and a control unit. The first infrared detection unit and the second infrared detection unit respectively include a first infrared diode and a second infrared diode for emitting infrared light, and a first photodiode and a second photodiode for detecting the infrared light. A first line connecting the center point of the first infrared diode and the center point of the first photodiode, and a second line connecting the center point of the second infrared diode and the center point of the second photodiode are perpendicular to the feed direction of the winding equipment. The first line and the second line are respectively aligned with the two side edges of the roll material entering the feed inlet. The control unit controls the web correction unit to fine-tune the position of the roll material according to the radiation power detected by the first photodiode and the second photodiode.

[0005] Furthermore, in the above-mentioned correction device, the first infrared detection unit further includes a first source-side converging lens whose focal point on one side coincides with the center point of the first infrared diode, for converging the infrared light emitted by the first infrared diode into a parallel beam, and a first receiving-side converging lens whose focal point on one side coincides with the center point of the first photodiode, for converging the parallel beam onto the first photodiode. The second infrared detection unit further includes a second source-side converging lens whose focal point on one side coincides with the center point of the second infrared diode, for converging the infrared light emitted by the second infrared diode into a parallel beam, and a second receiving-side converging lens whose focal point on one side coincides with the center point of the second photodiode, for converging the parallel beam onto the second photodiode.

[0006] Furthermore, in the aforementioned correction device, the direction of the line connecting the center points of the first infrared detection unit and the second infrared detection unit is perpendicular to the feeding direction of the roll material, and the length of the line connecting the center points of the first infrared detection unit and the second infrared detection unit is equal to the width of the roll material. The radii of the first light source-side converging lens, the first receiving-side converging lens, the second light source-side converging lens, and the second receiving-side converging lens are approximately equal to the maximum offset distance of the roll material at the first infrared detection unit and the second infrared detection unit. When the offset of the roll material is equal to the maximum offset distance, the roll material completely blocks the optical path from the first light source-side converging lens to the first receiving-side converging lens or the optical path from the second light source-side converging lens to the second receiving-side converging lens.

[0007] Furthermore, in the aforementioned web-correcting device, the web-correcting unit includes a rotating shaft with a length greater than the width of the roll material and a first motion controller for controlling the rotation of the rotating shaft as a whole along its axial direction. The surface of the rotating shaft is a rough surface. Before entering the feed inlet, the surface of the roll material makes full contact with the surface of the rotating shaft, causing the rotating shaft to rotate. The control unit is used for:

[0008] The roll material is controlled to enter the feed inlet at a preset moving speed;

[0009] Acquire the first radiant power and the second radiant power detected by the first photodiode and the second photodiode;

[0010] Determine whether the first radiated power and the second radiated power are equal;

[0011] When the first radiant power and the second radiant power are not equal, calculate the difference between the first radiant power and the second radiant power;

[0012] The offset direction of the roll material is determined based on the difference between the first radiant power and the second radiant power;

[0013] The offset distance of the roll is calculated based on the difference between the first radiation power and the second radiation power;

[0014] The first motion controller controls the entire rotating shaft to move the offset distance in the opposite direction of the offset direction.

[0015] Furthermore, in the aforementioned web-correcting device, the web-correcting unit further includes a speed detector for detecting the rotational speed of the shaft and a second motion controller for controlling the shaft as a whole to move along a preset radial direction, wherein the preset radial direction is the radial direction passing through the center line of the contact area between the shaft and the roll material. The control unit is further configured to:

[0016] The feeding speed is obtained, which is the moving speed of the roll material;

[0017] The rotational speed of the shaft is detected in real time by the speed detector;

[0018] Determine whether the rotation speed of the shaft matches the feeding speed;

[0019] When the rotation speed of the rotating shaft does not match the feeding speed, the second motion controller controls the entire rotating shaft to move along the preset direction in a preset step size.

[0020] The number of radial movements of the shaft is accumulated;

[0021] The steps of detecting the rotation speed of the rotating shaft and controlling the rotating shaft as a whole to move along the preset direction in a preset step size are executed repeatedly until the rotation speed of the rotating shaft matches the feeding speed or the number of radial movements of the rotating shaft exceeds a preset threshold.

[0022] When the radial movement of the shaft exceeds a preset threshold, a reminder message indicating that the shaft needs to be replaced is issued.

[0023] Furthermore, in the aforementioned web guiding device, before the step of controlling the roll material to enter the feed inlet at a preset moving speed, the control unit is also used to:

[0024] The positions where the two sides of the roll material coincide with the center points of the first infrared detection unit and the second infrared detection unit are determined as the standard positions;

[0025] The first motion controller controls the rotating shaft to drive the roll material to deflect towards the first infrared detection unit to reach the maximum deflection distance, so that the roll material completely blocks the optical path from the first light source side converging lens to the first receiving side converging lens and completely exposes the optical path from the second light source side converging lens to the second receiving side converging lens;

[0026] Light up the first infrared diode and the second infrared diode;

[0027] The first motion controller controls the rotating shaft to slowly shift the roll material toward the direction of the second infrared detection unit;

[0028] The offset distance of the roll material relative to the standard position and the first and second radiation powers detected by the first and second photodiodes are acquired in real time.

[0029] When the roll material deviates towards the second infrared detection unit to the maximum offset distance, so that the roll material completely blocks the optical path from the second light source-side converging lens to the second receiving-side converging lens and completely exposes the optical path from the first light source-side converging lens to the first receiving-side converging lens, the first motion controller controls the rotating shaft to stop moving.

[0030] A first mapping function P1 is fitted between the first radiated power and the relative distance. t =f1(D t The second mapping function P2 between the second radiated power and the relative distance t =f2(D t ).

[0031] Furthermore, in the aforementioned web-correcting device, in the step of acquiring the offset distance of the roll material relative to the standard position in real time, the control unit is also used to:

[0032] Obtain the maximum offset distance D max ;

[0033] Obtain the moving speed v and moving time t of the rotating shaft;

[0034] Calculate the offset distance D of the roll material relative to the standard position. t =D max -v·t.

[0035] Furthermore, in the aforementioned correction device, a first mapping function P1 is used to fit the first radiated power to the relative distance. t =f1(D t The second mapping function P2 between the second radiated power and the relative distance t =f2(D t Following the step of ), the control unit is further configured to:

[0036] Get the offset distance D t =0 at time point t m ;

[0037] Get t m First radiated power at time Second radiated power

[0038] t was calculated m Radiated power difference at time

[0039] Obtain the first radiated power P1 at any time t t Second radiated power P2 t ;

[0040] According to the t m Radiated power difference at time And the first radiated power P1 at any time t t Second radiated power P2 t Calculate the first calibration parameter ΔP1 at any time t. t Second calibration parameter ΔP2 t ;

[0041] Establish the relative distance and the first radiated power P1 t The second radiated power P2 t The first calibration parameter ΔP1 t and the second calibration parameter ΔP2 tThe correspondence.

[0042] Furthermore, in the aforementioned correction device, based on the stated t m Radiated power difference at time And the first radiated power P1 at any time t t Second radiated power P2 t Calculate the first calibration parameter ΔP1 at any time t. t Second calibration parameter ΔP2 t In the steps described above, the control unit is further configured to:

[0043] Obtain the maximum and minimum values ​​P1 of the first radiated power and the second radiated power. max P1 min P2 max and P2 min ;

[0044] Calculate the first calibration parameter

[0045] Calculate the second calibration parameter

[0046] Furthermore, in the aforementioned correction device, before the step of determining whether the first radiated power and the second radiated power are equal, the control unit is further configured to:

[0047] Acquire the first radiation power P1 and the second radiation power P2 detected by the first photodiode and the second photodiode;

[0048] Obtain the first calibration parameter ΔP1 of the first radiated power and the second calibration parameter ΔP2 of the second radiated power;

[0049] The first radiated power and the second radiated power are calibrated using the first calibration parameter ΔP1 and the second calibration parameter ΔP2.

[0050] This invention proposes a web-correcting device based on the principle of through-beam blocking, comprising a first infrared detection unit and a second infrared detection unit disposed on both sides of the feed inlet of a winding device, a web-correcting unit disposed on one side of the first infrared detection unit and / or the second infrared detection unit, and a control unit. The first infrared detection unit and the second infrared detection unit respectively include a first infrared diode and a second infrared diode for emitting infrared light, and a first photodiode and a second photodiode for detecting the infrared light. A first line connecting the center point of the first infrared diode and the center point of the first photodiode, and a second line connecting the center point of the second infrared diode and the center point of the second photodiode, are perpendicular to the feed direction of the winding device. The first line and the second line are respectively aligned with the two edges of the roll material entering the feed inlet. The control unit controls the web-correcting unit to fine-tune the position of the roll material according to the radiation power detected by the first photodiode and the second photodiode, which can achieve high-precision web-correction at low cost. Attached Figure Description

[0051] Figure 1 This is a structural diagram of a first infrared detection unit and a second infrared detection unit provided in an embodiment of the present invention;

[0052] Figure 2(a) is a schematic diagram of the web-correcting device provided in an embodiment of the present invention in the direction perpendicular to the surface of the roll material;

[0053] Figure 2(b) is a schematic diagram of the web-correcting device provided in an embodiment of the present invention in a direction parallel to the surface of the roll material. Detailed Implementation

[0054] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0055] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0056] In the description of this invention, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. The terms "connect," "install," "fix," etc., should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0057] In the description of this specification, the terms "one embodiment," "some implementations," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. 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.

[0058] The following description, with reference to the accompanying drawings, describes a correction device based on the principle of beam blocking according to some embodiments of the present invention.

[0059] This invention proposes a web-correcting device based on the principle of through-beam blocking, comprising a first infrared detection unit and a second infrared detection unit disposed on both sides of the feed inlet of a winding device, a web-correcting unit disposed on one side of the first infrared detection unit and / or the second infrared detection unit, and a control unit. The first infrared detection unit and the second infrared detection unit respectively include a first infrared diode and a second infrared diode for emitting infrared light, and a first photodiode and a second photodiode for detecting the infrared light. A first line connecting the center point of the first infrared diode and the center point of the first photodiode, and a second line connecting the center point of the second infrared diode and the center point of the second photodiode, are perpendicular to the feed direction of the winding device. The first line and the second line are respectively aligned with the two edges of the roll material entering the feed inlet. The control unit controls the web-correcting unit to fine-tune the position of the roll material according to the radiation power detected by the first photodiode and the second photodiode.

[0060] In the above-described correction device, the first infrared detection unit further includes a first source-side converging lens whose focal point on one side coincides with the center point of the first infrared diode, for converging the infrared light emitted by the first infrared diode into a parallel beam, and a first receiving-side converging lens whose focal point on one side coincides with the center point of the first photodiode, for converging the parallel beam onto the first photodiode. The second infrared detection unit further includes a second source-side converging lens whose focal point on one side coincides with the center point of the second infrared diode, for converging the infrared light emitted by the second infrared diode into a parallel beam, and a second receiving-side converging lens whose focal point on one side coincides with the center point of the second photodiode, for converging the parallel beam onto the second photodiode.

[0061] Figure 1 The diagram illustrates the specific structures of a first infrared detection unit and a second infrared detection unit in a correction device proposed in some embodiments of the present invention. Both the first and second infrared detection units include an infrared diode, a photodiode, and two lenses. The lens closest to the infrared diode is a light source-side converging lens, which, together with the infrared diode, forms an infrared emitter. This infrared emitter is equipped with a housing (not shown in the diagram) to ensure that the infrared light emitted by the infrared diode can only pass through this light source-side converging lens. The lens closest to the photodiode is a receiving-side converging lens, which, together with the photodiode, forms an infrared receiver. This infrared receiver is equipped with a housing (not shown in the diagram) to reduce interference from infrared light from other directions on the photodiode.

[0062] Figures 2(a) and 2(b) show schematic diagrams of the web-correcting device proposed in some embodiments of the present invention in directions perpendicular to and parallel to the surface of the roll material. The arrows in Figure 2(a) indicate the feeding direction of the roll material. In the aforementioned web-correcting device, the direction of the line connecting the center points of the first infrared detection unit and the second infrared detection unit is perpendicular to the feeding direction of the roll material, and the length of the line connecting the center points of the first infrared detection unit and the second infrared detection unit is equal to the width of the roll material. The radii of the first light source-side converging lens, the first receiving-side converging lens, the second light source-side converging lens, and the second receiving-side converging lens are approximately equal to the maximum offset distance of the roll material at the first infrared detection unit and the second infrared detection unit. When the offset of the roll material is equal to the maximum offset distance, the roll material completely blocks the optical path from the first light source-side converging lens to the first receiving-side converging lens or the optical path from the second light source-side converging lens to the second receiving-side converging lens.

[0063] In the aforementioned web-correcting device, the web-correcting unit includes a rotating shaft with a length greater than the width of the roll material and a first motion controller for controlling the rotation of the rotating shaft as a whole along its axial direction. The surface of the rotating shaft is rough, and the surface of the roll material makes full contact with the surface of the rotating shaft before entering the feed inlet, thereby driving the rotating shaft to rotate. The control unit is used for:

[0064] The roll material is controlled to enter the feed inlet at a preset moving speed;

[0065] Acquire the first radiant power and the second radiant power detected by the first photodiode and the second photodiode;

[0066] Determine whether the first radiated power and the second radiated power are equal;

[0067] When the first radiant power and the second radiant power are not equal, calculate the difference between the first radiant power and the second radiant power;

[0068] The offset direction of the roll material is determined based on the difference between the first radiant power and the second radiant power;

[0069] The offset distance of the roll is calculated based on the difference between the first radiation power and the second radiation power;

[0070] The first motion controller controls the entire rotating shaft to move the offset distance in the opposite direction of the offset direction.

[0071] Specifically, in the technical solution of the above embodiment, the first infrared diode and the second infrared diode are controlled to emit infrared light with the same radiation intensity I0. In the technical solution of this embodiment, the radii of the first light source-side converging lens and the second light source-side converging lens are equal, and the radius of the infrared diode is much smaller than the radii of the first light source-side converging lens and the second light source-side converging lens. The power of the light column emitted from the first light source-side converging lens and the second light source-side converging lens is... The distances between the first light source-side converging lens and the first receiving-side converging lens, and between the second light source-side converging lens and the second receiving-side converging lens, are equal and slightly greater than the thickness of the roll material. This results in negligible attenuation of the light beam reaching the first and second receiving-side converging lenses. Therefore, the power of the light beam received by the first and second receiving-side converging lenses is also negligible. That is, when the first infrared detection unit or the second infrared detection unit is not blocked by the roll material, the first radiation power and the second radiation power detected by the first photodiode or the second photodiode should be P0. In the initial state, when the position of the roll material has not shifted, the light beams of both the first and second infrared detection units are blocked by half of their luminous flux by the roll material. At this time, the first radiation power and the second radiation power detected by the first photodiode and the second photodiode should be P0. When the position of the roll material shifts, the light flux of the first infrared detection unit and the second infrared detection unit changes, with one light flux increasing and the other light flux decreasing. Therefore, when the position of the roll material shifts, the first radiation power and the second radiation power will inevitably be different. The offset distance of the roll material can be calculated based on the first radiation power and the second radiation power, thereby controlling the correction unit to correct the position of the roll material.

[0072] In the aforementioned web-correcting device, the web-correcting unit further includes a speed detector for detecting the rotational speed of the shaft and a second motion controller for controlling the shaft as a whole to move along a preset radial direction, wherein the preset radial direction is the radial direction passing through the center line of the contact area between the shaft and the roll material, and the control unit is further configured to:

[0073] The feeding speed is obtained, which is the moving speed of the roll material;

[0074] The rotational speed of the shaft is detected in real time by the speed detector;

[0075] Determine whether the rotation speed of the shaft matches the feeding speed;

[0076] When the rotation speed of the rotating shaft does not match the feeding speed, the second motion controller controls the entire rotating shaft to move along the preset direction in a preset step size.

[0077] The number of radial movements of the shaft is accumulated;

[0078] The steps of detecting the rotation speed of the rotating shaft and controlling the rotating shaft as a whole to move along the preset direction in a preset step size are executed repeatedly until the rotation speed of the rotating shaft matches the feeding speed or the number of radial movements of the rotating shaft exceeds a preset threshold.

[0079] When the radial movement of the shaft exceeds a preset threshold, a reminder message indicating that the shaft needs to be replaced is issued.

[0080] In some embodiments of the present invention, a plurality of piezoelectric sensors are further provided on the side of the rotating shaft surface that contacts the roll material. The control unit detects the pressure applied by the roll material to the rotating shaft surface using the piezoelectric sensors. When the pressure applied by the roll material to the rotating shaft surface is less than a preset threshold, the second motion controller controls the entire rotating shaft to move along the preset direction with a preset step size to ensure full contact between the roll material and the rotating shaft surface. Furthermore, the control unit also detects the width of the contact position between the roll material and the rotating shaft surface using the piezoelectric sensors to determine whether the surface of the roll material in contact with the rotating shaft has undergone deformation such as bulging or folding, and issues a warning message when deformation of the roll material is detected.

[0081] In the aforementioned web-correcting device, before the step of controlling the roll material to enter the feed inlet at a preset moving speed, the control unit is further configured to:

[0082] The positions where the two sides of the roll material coincide with the center points of the first infrared detection unit and the second infrared detection unit are determined as the standard positions;

[0083] The first motion controller controls the rotating shaft to drive the roll material to deflect towards the first infrared detection unit to reach the maximum deflection distance, so that the roll material completely blocks the optical path from the first light source side converging lens to the first receiving side converging lens and completely exposes the optical path from the second light source side converging lens to the second receiving side converging lens;

[0084] Light up the first infrared diode and the second infrared diode;

[0085] The first motion controller controls the rotating shaft to slowly shift the roll material toward the direction of the second infrared detection unit;

[0086] The offset distance of the roll material relative to the standard position and the first and second radiation powers detected by the first and second photodiodes are acquired in real time.

[0087] When the roll material deviates towards the second infrared detection unit to the maximum offset distance, so that the roll material completely blocks the optical path from the second light source-side converging lens to the second receiving-side converging lens and completely exposes the optical path from the first light source-side converging lens to the first receiving-side converging lens, the first motion controller controls the rotating shaft to stop moving.

[0088] A first mapping function P1 is fitted between the first radiated power and the relative distance. t =f1(D t The second mapping function P2 between the second radiated power and the relative distance t =f2(D t ).

[0089] In the aforementioned web-correcting device, in the step of acquiring the offset distance of the roll material relative to the standard position in real time, the control unit is further configured to:

[0090] Obtain the maximum offset distance D max ;

[0091] Obtain the moving speed v and moving time t of the rotating shaft;

[0092] Calculate the offset distance D of the roll material relative to the standard position. t =D max -v·t.

[0093] Different types of roll materials have different transmittance to infrared light. Using the technical solution of the above-described embodiment, before the production process begins, the first infrared detection unit and the second infrared detection unit are used to initialize the roll material and fit the mapping function between different occlusion conditions of the roll material, i.e., different offset distances and radiation power. This allows for adaptive detection and calculation of offset distances for different roll materials without the need for manual intervention.

[0094] In the aforementioned correction device, a first mapping function P1 is used to fit the first radiated power and the relative distance. t =f1(D t The second mapping function P2 between the second radiated power and the relative distance t =f2(D t Following the step of ), the control unit is further configured to:

[0095] Get the offset distance D t=0 at time point t m ;

[0096] Get t m First radiated power at time Second radiated power

[0097] t was calculated m Radiated power difference at time

[0098] Obtain the first radiated power P1 at any time t t Second radiated power P2 t ;

[0099] According to the t m Radiated power difference at time And the first radiated power P1 at any time t t Second radiated power P2 t Calculate the first calibration parameter ΔP1 at any time t. t Second calibration parameter ΔP2 t ;

[0100] Establish the relative distance and the first radiated power P1 t The second radiated power P2 t The first calibration parameter ΔP1 t and the second calibration parameter ΔP2 t The correspondence.

[0101] In the aforementioned correction device, based on the stated t m Radiated power difference at time And the first radiated power P1 at any time t t Second radiated power P2 t Calculate the first calibration parameter ΔP1 at any time t. t Second calibration parameter ΔP2 t In the steps described above, the control unit is further configured to:

[0102] Obtain the maximum and minimum values ​​P1 of the first radiated power and the second radiated power. max P1 min P2 max and P2 min ;

[0103] Calculate the first calibration parameter

[0104] Calculate the second calibration parameter

[0105] In the above-described correction device, before the step of determining whether the first radiated power and the second radiated power are equal, the control unit is further configured to:

[0106] Acquire the first radiation power P1 and the second radiation power P2 detected by the first photodiode and the second photodiode;

[0107] Obtain the first calibration parameter ΔP1 of the first radiated power and the second calibration parameter ΔP2 of the second radiated power;

[0108] The first radiated power and the second radiated power are calibrated using the first calibration parameter ΔP1 and the second calibration parameter ΔP2.

[0109] In the technical solution of this invention, ideally, the photodiodes of two infrared detection units detect the same radiation power when the shielding area is the same. However, due to individual differences between infrared diodes, photodiodes, and converging lenses, as well as the different attenuation rates of these devices during use, the magnitudes of the output photocurrents will differ even when the shielding area is exactly the same. To avoid the reduction in correction accuracy caused by these factors, the technical solution of the above embodiment calculates calibration parameters for the two infrared detection units using initialization data, and then calibrates the detected radiation power during the production process based on these calibration parameters.

[0110] This invention proposes a web-correcting device based on the principle of through-beam blocking, comprising a first infrared detection unit and a second infrared detection unit disposed on both sides of the feed inlet of a winding device, a web-correcting unit disposed on one side of the first infrared detection unit and / or the second infrared detection unit, and a control unit. The first infrared detection unit and the second infrared detection unit respectively include a first infrared diode and a second infrared diode for emitting infrared light, and a first photodiode and a second photodiode for detecting the infrared light. A first line connecting the center point of the first infrared diode and the center point of the first photodiode, and a second line connecting the center point of the second infrared diode and the center point of the second photodiode, are perpendicular to the feed direction of the winding device. The first line and the second line are respectively aligned with the two edges of the roll material entering the feed inlet. The control unit controls the web-correcting unit to fine-tune the position of the roll material according to the radiation power detected by the first photodiode and the second photodiode, which can achieve high-precision web-correction at low cost.

[0111] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0112] As described above, these embodiments of the present invention do not exhaustively cover all details, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A correction device based on the principle of beam blocking, characterized in that, The device includes a first infrared detection unit and a second infrared detection unit disposed on both sides of the feed inlet of the winding device, a correction unit disposed on one side of the first infrared detection unit and / or the second infrared detection unit, and a control unit. The first infrared detection unit and the second infrared detection unit respectively include a first infrared diode and a second infrared diode for emitting infrared light, and a first photodiode and a second photodiode for detecting the infrared light. A first line connecting the center point of the first infrared diode and the center point of the first photodiode, and a second line connecting the center point of the second infrared diode and the center point of the second photodiode are perpendicular to the feed direction of the winding device. The first line and the second line are respectively aligned with the two edges of the roll material entering the feed inlet. The control unit controls the correction unit to fine-tune the position of the roll material according to the radiation power detected by the first photodiode and the second photodiode. The web-correcting unit includes a rotating shaft with a length greater than the width of the roll material and a first motion controller for controlling the overall movement of the rotating shaft along its axial direction. The surface of the rotating shaft is rough, and the surface of the roll material makes full contact with the surface of the rotating shaft before entering the feed inlet, thereby driving the rotating shaft to rotate. The control unit is used for: The roll material is controlled to enter the feed inlet at a preset moving speed; Acquire the first radiant power and the second radiant power detected by the first photodiode and the second photodiode; Determine whether the first radiated power and the second radiated power are equal; When the first radiant power and the second radiant power are not equal, calculate the difference between the first radiant power and the second radiant power; The offset direction of the roll material is determined based on the difference between the first radiant power and the second radiant power; The offset distance of the roll is calculated based on the difference between the first radiation power and the second radiation power; The first motion controller controls the entire rotating shaft to move the offset distance in the opposite direction of the offset direction; The correction unit further includes a speed detector for detecting the rotational speed of the shaft and a second motion controller for controlling the shaft to move as a whole along a preset radial direction, wherein the preset radial direction is the radial direction passing through the center line of the contact area between the shaft and the roll material, and the control unit is further configured to: The feeding speed is obtained, which is the moving speed of the roll material; The rotational speed of the shaft is detected in real time by the speed detector; Determine whether the rotation speed of the shaft matches the feeding speed; When the rotation speed of the rotating shaft does not match the feeding speed, the second motion controller controls the entire rotating shaft to move along the preset direction in a preset step size. The number of radial movements of the shaft is accumulated; The steps of detecting the rotation speed of the rotating shaft and controlling the rotating shaft as a whole to move along the preset direction in a preset step size are executed repeatedly until the rotation speed of the rotating shaft matches the feeding speed or the number of radial movements of the rotating shaft exceeds a preset threshold. When the radial movement of the shaft exceeds a preset threshold, a reminder message indicating that the shaft needs to be replaced is issued.

2. The correction device according to claim 1, characterized in that, The first infrared detection unit further includes a first source-side converging lens whose focal point on one side coincides with the center point of the first infrared diode, for converging the infrared light emitted by the first infrared diode into a parallel beam, and a first receiving-side converging lens whose focal point on one side coincides with the center point of the first photodiode, for converging the parallel beam onto the first photodiode. The second infrared detection unit further includes a second source-side converging lens whose focal point on one side coincides with the center point of the second infrared diode, for converging the infrared light emitted by the second infrared diode into a parallel beam, and a second receiving-side converging lens whose focal point on one side coincides with the center point of the second photodiode, for converging the parallel beam onto the second photodiode.

3. The correction device according to claim 2, characterized in that, The direction of the line connecting the center points of the first infrared detection unit and the second infrared detection unit is perpendicular to the feeding direction of the roll material, and the length of the line connecting the center points of the first infrared detection unit and the second infrared detection unit is equal to the width of the roll material. The radii of the first light source-side converging lens, the first receiving-side converging lens, the second light source-side converging lens, and the second receiving-side converging lens are equal to the maximum offset distance of the roll material at the first infrared detection unit and the second infrared detection unit. When the offset of the roll material is equal to the maximum offset distance, the roll material completely blocks the optical path from the first light source-side converging lens to the first receiving-side converging lens or the optical path from the second light source-side converging lens to the second receiving-side converging lens.

4. The correction device according to claim 3, characterized in that, Before the step of controlling the roll material to enter the feed inlet at a preset moving speed, the control unit is also configured to: The positions where the two sides of the roll material coincide with the center points of the first infrared detection unit and the second infrared detection unit are determined as the standard positions; The first motion controller controls the rotating shaft to drive the roll material to deflect towards the first infrared detection unit to reach the maximum deflection distance, so that the roll material completely blocks the optical path from the first light source side converging lens to the first receiving side converging lens and completely exposes the optical path from the second light source side converging lens to the second receiving side converging lens; Light up the first infrared diode and the second infrared diode; The first motion controller controls the rotating shaft to slowly shift the roll material toward the direction of the second infrared detection unit; The offset distance of the roll material relative to the standard position and the first and second radiation powers detected by the first and second photodiodes are acquired in real time. When the roll material deviates towards the second infrared detection unit to the maximum offset distance, so that the roll material completely blocks the optical path from the second light source-side converging lens to the second receiving-side converging lens and completely exposes the optical path from the first light source-side converging lens to the first receiving-side converging lens, the first motion controller controls the rotating shaft to stop moving. A first mapping function is fitted to the first radiated power and the offset distance. The second mapping function between the second radiated power and the offset distance .

5. The correction device according to claim 4, characterized in that, In the step of acquiring the offset distance of the roll material relative to the standard position in real time, the control unit is further configured to: Obtain the maximum offset distance ; Obtain the moving speed of the rotating shaft and travel time ; Calculate the offset distance of the roll material relative to the standard position. .

6. The correction device according to claim 4, characterized in that, The first mapping function is fitted to the first radiated power and the offset distance. The second mapping function between the second radiated power and the offset distance Following the steps described above, the control unit is further configured to: Get offset distance The time point ; Get First radiated power at time Second radiated power ; Calculated Radiated power difference at time ; Get any time First radiated power Second radiated power ; According to the above Radiated power difference at time and at any time First radiated power Second radiated power Calculate any time interval First calibration parameter Second calibration parameter ; Establish the offset distance and the first radiated power The second radiated power The first calibration parameter and the second calibration parameter The correspondence.

7. The correction device according to claim 6, characterized in that, According to the above Radiated power difference at time and at any time First radiated power Second radiated power Calculate any time interval First calibration parameter Second calibration parameter In the steps described above, the control unit is further configured to: Obtain the maximum and minimum values ​​of the first radiated power and the second radiated power. , , and ; Calculate the first calibration parameter ; Calculate the second calibration parameter .

8. The correction device according to claim 6, characterized in that, Before the step of determining whether the first radiated power and the second radiated power are equal, the control unit is further configured to: Obtain the first radiated power detected by the first photodiode and the second photodiode. Second radiated power ; Obtain the first calibration parameter of the first radiated power and the second calibration parameter of the second radiated power ; Using the first calibration parameter and the second calibration parameter The first radiant power and the second radiant power are calibrated.

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