Color-coated sheet body deformation detection device
By using wire harness laser and optical reflection control technology, combined with the unique conveying mechanism design, the problems of low accuracy and easy damage of traditional detection methods are solved, and high-precision, contactless color-coated plate deformation detection is achieved.
Patent Information
- Application Number
- CN202510127080.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-29
- Publication Date
- 2025-04-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The traditional color-coated plate deformation detection method has low measurement accuracy and is prone to secondary damage, making it difficult to accurately detect deformation areas without contacting the color-coated plate.
The wire harness laser is used as the detection medium, and optical reflection control and analysis is performed through the angle reflector and the surface array CCD. Combined with the unique conveying mechanism design, the directional movement and laser detection of the color-coated plate are realized.
The measurement accuracy of color-coated plate deformation is improved, and the damage to color-coated plates is avoided by mechanical detection is prevented. The deformation area can be accurately detected without contacting color-coated plates, which improves detection efficiency and accuracy.
Smart Images
Figure CN119803334A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of plate body detection, in particular to a device for detecting deformation of a color-coated plate body. Background Art
[0002] Color coated steel sheet, also called color coated steel sheet, is a steel sheet with an organic coating.
[0003] During the cold rolling process, the steel plate is subjected to the rolling force, the grain structure is changed, and residual internal stress is generated. During the coating and drying curing process, the curing shrinkage of the coating will also generate internal stress. If the thermal expansion coefficients between the coating and the substrate do not match, this internal stress will be more obvious when the temperature changes. When these internal stresses are released during subsequent processing or use, they will cause the color-coated plate to deform.
[0004] Color-coated panels used as exterior wall panels and roof panels of buildings, if deformed, will damage the overall appearance of the building and affect the aesthetics of the building. In industrial equipment and home appliances, deformed color-coated panel shells may affect the normal assembly and operation of the equipment. Deformation of color-coated panels may damage the integrity of their coatings, causing cracks or peeling of the coatings. This will reduce the protective effect of the color-coated panels on the substrate, making the substrate more susceptible to corrosion.
[0005] In order to eliminate the above-mentioned hazards caused by the deformation of color-coated plates, strict appearance inspection of color-coated plates is required in the factory inspection procedure of color-coated plates. However, traditional deformation detection methods, such as visual inspection or mechanical contact measurement, have problems such as low measurement accuracy and large measurement damage. In view of this: how to innovate detection technology to further improve the measurement accuracy of the deformed area with as little or no contact with the color-coated plates as possible is an important issue that needs to be solved urgently. Summary of the invention
[0006] The object of the present invention is to provide a device for detecting deformation of a color-coated plate to solve the problems raised by the above-mentioned background technology.
[0007] To achieve the above object, the present invention provides the following technical solution: a color-coated plate body deformation detection device, comprising: A corner reflector, wherein the corner reflector is composed of two mutually perpendicular reflection areas, and the reflection surface of at least one reflection area is the surface of a color-coated plate; A laser emitter, the laser emitter is located at one side of a reflective area, and the laser emitter is used to emit a laser pattern toward the reflective area; An area array CCD, wherein the area array CCD is located on one side of the other reflection area, and the laser receiving plane of the area array CCD and the laser plane of the laser transmitter are located on the same plane; The conveying mechanism is located below the color-coated plate and is used to carry the color-coated plate for directional movement.
[0008] Preferably, the laser emitter is a laser line projector formed by combining a laser emission system and a collimating lens group. The laser emitter generates a point beam laser through the laser emission system, and the laser emitter expands the point beam laser into a line beam laser through the collimating lens group.
[0009] Preferably, the direction of the linear laser beam is perpendicular to the moving direction of the color-coated plate.
[0010] Preferably, the planar size specification of the area array CCD is the same as the planar size specification of the laser emitter.
[0011] Preferably, the conveying mechanism comprises a hard guide rail and a conveyor belt, a plurality of magnetic adsorption plates are evenly spaced on the hard guide rail, and slots corresponding to the shapes of the magnetic adsorption plates are provided on both sides of the hard guide rail.
[0012] Preferably, the hard guide rail is formed by a contact section and a separation section connected end to end, and the two side slots located at the contact section are respectively provided with positive contacts and negative contacts, and a coil is wound inside the magnetic adsorption plate, and the magnetic adsorption plate forms a magnetic field when passing through the contact section.
[0013] Preferably, the conveyor belt is located below the hard guide rail, and a plurality of vertical push rods are evenly distributed on the surface of the conveyor belt. The top end of the vertical push rod overlaps one side of the magnetic adsorption plate, and the bottom end of the vertical push rod is fixedly connected to the surface of the conveyor belt.
[0014] Preferably, the reflective surfaces of the two reflective areas of the corner reflector are both set to be color-coated plate surfaces.
[0015] Preferably, the color-coated plate is placed parallel to the ground or tilted at 45° to the ground.
[0016] Preferably, the plane where the laser emitter and the area array CCD are located is perpendicular to the plane where the angular bisectors of the two reflection areas of the corner reflector are located.
[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, a linear beam laser is used as a detection medium for the deformation of the color-coated plate. There is no need to contact the surface of the color-coated plate, thereby avoiding secondary damage to the color-coated plate caused by mechanical detection. The linear beam laser is accurately projected onto the surface of the color-coated plate by virtue of its highly concentrated and specifically directional beam characteristics. At the same time, a color-coated plate-color-coated plate or a color-coated plate-reflector is used as a corner reflector for light control. When the color-coated plate is in a flat state, the linear beam laser follows the established optical reflection law and is projected onto the designated area array CCD. The slight deformation of the surface of the color-coated plate amplifies the offset effect under the action of the linear beam laser, making the deformed area easier to observe, thereby improving the test accuracy of measuring the deformation of the color-coated plate.
[0018] 2. In the present invention, the detection results of the area array CCD are used for analysis. The linear beam laser reflected by the deformed area is deformed and fractured on the area array CCD. The distance of the deformation and fracture of the linear beam laser is tested. The slope of the deformed area is calculated based on the trigonometric function relationship corresponding to the position layout of the corner reflector, the laser emitter and the area array CCD. The deformation distance corresponding to the linear beam laser in the scanning is calculated in combination with the deformation time of the laser pattern during the movement of the color-coated plate, thereby inferring the area of the deformed area to obtain the degree of deformation of the color-coated plate.
[0019] 3. In the present invention, when a color-coated plate-color-coated plate is used as a corner reflector for deformation measurement, the linear laser passes through two smooth color-coated plate surfaces along a normal reflection route and returns to the area array CCD to maintain a normal shape and proportion; if distortion, breakage, etc. occur, it is determined that at least one of the reflection surfaces is uneven, and one of the conveying mechanisms is stopped, so that one color-coated plate is stationary relative to the laser irradiation area and the other moves, and it is observed whether the deformation position of the linear laser received in the area array CCD moves to identify the color-coated plate and the specific position where the deformed plate is located, and such cyclic detection is performed to improve the detection efficiency.
[0020] 4. Aiming at the demand for laser detection of color-coated plates, the present invention designs a unique conveying structure: the hard guide rail is surrounded by a contact section and a separation section connected end to end, and positive and negative contacts are provided on both sides of the card slot of the separation section. When the magnetic adsorption plate runs to the contact section, it contacts the contact point, and the internal coil is energized to generate a magnetic attraction force to fix the color-coated plate. The vertical push rod pushes the magnetic adsorption plate to move. Because the magnetic adsorption plate is spaced in between, it will not directly press on the color-coated plate, avoiding interference with the detection. The two ends of the magnetic adsorption plate are tightly embedded in the card slot, and the card slot and the magnetic adsorption plate fit tightly with a very small gap. In addition, materials such as boron nitride are coated on the contact part between the two, which effectively reduces the friction coefficient and reduces movement wear, ensuring that the reflective surface is stable when the color-coated plate moves in a directional manner, and ensuring that the laser detection is not interfered with. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is the regional distribution diagram of the color-coated plate body at different deformation positions; Figure 2This is a simplified diagram of the distribution of the linear laser in the deformation area of the color-coated plate; Figure 3 It is a simplified diagram of the pattern formed by the linear laser after reflection; Figure 4 It is a mathematical model diagram of the running path of the linear laser under the action of the corner reflector in a color-coated plate deformation detection device of the present invention; Figure 5 It is a mathematical analysis model diagram of the deviation angle of the reflected light in the deformation area of the color-coated plate; Figure 6 It is a mathematical analysis model diagram of the path deviation of the line beam laser transmitted through the deformation area of the color-coated plate body after passing through the corner reflector in a color-coated plate body deformation detection device of the present invention; Figure 7 This is a schematic diagram of the overall structure of a color-coated plate deformation detection device of the present invention when simultaneously detecting two color-coated plates; Figure 8 It is a schematic diagram of the overall structure of a color-coated plate deformation detection device of the present invention when detecting a single color-coated plate; Fig. 9 It is a partial structural schematic diagram of a conveying mechanism in a color-coated plate deformation detection device of the present invention; Fig.10 It is a structural schematic diagram of a neutral push rod and a magnetic adsorption plate of a color-coated plate deformation detection device of the present invention; Fig.11 The present invention is a schematic diagram of the structural distribution of a hard guide rail in a device for detecting deformation of a color-coated plate.
[0022] In the figure: 1. corner reflector; 2. laser transmitter; 3. area array CCD; 4. conveying mechanism; 5. hard guide rail; 51. contact section; 52. separation section; 6. conveyor belt; 7. vertical push rod; 8. magnetic adsorption plate. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0024] Example 1: Reference Figure 1-11As shown: a color-coated plate deformation detection device, comprising: a corner reflector 1, the corner reflector 1 is composed of two mutually perpendicular reflection areas, and the reflection surface of at least one of the reflection areas is the surface of the color-coated plate; a laser emitter 2, the laser emitter 2 is located on one side of a reflection area, and the laser emitter 2 is used to emit a laser pattern to the reflection area; an area array CCD3, the area array CCD3 is located on the other side of the reflection area, and the laser receiving plane of the area array CCD3 and the laser plane of the laser emitter 2 are located on the same plane; a conveying mechanism 4, the conveying mechanism 4 is located below the color-coated plate, and is used to carry the color-coated plate for directional movement.
[0025] In this embodiment, if the surface of the color-coated plate is deformed, and the deformed area can be divided into several parts, refer to the attached Figure 3 In the actual deformation situation, the area of A, B, C and other areas occupies a smaller area of the entire deformation area, and the area of D occupies a larger area of the entire deformation area. The flat surface of the color-coated plate is area E, then the area parallel to the center of the deformation area and area E is area A, the deformation areas on the left and right sides of area A are both area B, and the deformation areas on the upper and lower sides of area A are both area C. The color-coated plate is placed in the reflection area for analysis, with the z-axis as the boundary between the two reflection areas, the bottom edges of the slope surface of area B are parallel to the z-axis, and the bottom edges of the slope surface of area C are perpendicular to the z-axis. The laser pattern generated by the laser transmitter 2 has a line segment that is either perpendicular to the z-axis, parallel to the z-axis, or inclined to the z-axis. When the pattern is reflected through area B, its reflection angle is tilted left and right, and the image is dislocated in the left and right directions. The laser pattern perpendicular to the z-axis overlaps with the original pattern after dislocation, and no actual dislocation effect is produced visually. The laser pattern parallel to or inclined to the z-axis is disconnected from the original pattern after dislocation, and an actual dislocation effect is produced visually. Similarly, when the pattern is reflected through area C, its reflection angle tilts up and down. The laser pattern parallel to the z-axis does not produce an actual misalignment effect visually, while the laser pattern perpendicular or tilted to the z-axis produces an actual misalignment effect visually.
[0026] Another situation is that there is area D as a fillet between area B and area C, and the laser reflection line shot into area D will be offset in the left and right directions and the up and down directions at the same time. In the display panel of laser emitter 2, there are two broken laser beams (formed by the reflected laser beams from area B and area C respectively) and there is a curved connecting line in between (formed by the reflected laser beam from area D), and because the curved connecting line has been deformed, the light intensity of the curved connecting line is lower than that of other beams, and in the actual deformation situation, areas A, B, C, etc. occupy a smaller area of the entire deformation area, and the area of area D occupies a larger area of the entire deformation area.
[0027] Based on the design principle of the corner reflector 1, if the two reflective surfaces of the reflective area are both flat surfaces, no matter from which direction the laser light is projected, a reflected light parallel to the incident light can be emitted, and the incident light and the reflected light are separated by a certain distance. Based on the distance data, the placement position of the area array CCD3 is determined so that it can completely receive the linear laser emitted from the laser emitter 2. Therefore, the laser emitter 2 and the area array CCD3 are respectively arranged on the corresponding sides of the two reflective areas of the corner reflector 1. Both reflective areas can use color-coated plates as reflective surfaces for testing. One color-coated plate can be used as a reflective surface alone, and a smooth and flat mirror can be used as the other reflective surface for testing. The deformed area on the surface of the color-coated plate can be detected according to the shape of the image in the area array CCD3.
[0028] The area array CCD3 is mainly composed of two-dimensionally arranged photosensitive elements, which are suitable for analyzing the deformation of lasers. Taking photodiodes as an example of photosensitive elements, when light irradiates the PN junction, the photon energy is absorbed, generating electron-hole pairs, and forming photocurrent under the action of the built-in electric field. The size of the photocurrent is proportional to the intensity of the incident light, which reflects the shape of the laser image on the area array CCD3. Photodiodes have the advantages of fast response speed, high sensitivity, small size and low cost, which meet the design requirements of industrial detection; The relationship between the offset position of the laser beam and the deformation degree of the color-coated plate is analyzed. Figure 4 As explained above, the intersection of the plane where the laser emitter 2 and the array CCD 3 are located and the angle bisector of the corner reflector 1 is taken as the origin to establish a plane coordinate system. The coordinates of the intersection of the corner reflector 1 are , the coordinates of the first reflection point of the laser emitted by laser transmitter 2 and corner reflector 1 are , the total length of the laser walk is If the laser touches the deformation area, the laser path will be offset. Suppose the slope of the deformation area is (The slope of the arc slope is based on the slope of the laser beam irradiation position), then the offset angle of the laser reflection route is , refer to the attached Figure 5 If the deformed area is within the first reflection area, the laser needs to travel distance (the line beam laser will travel when there is no angle deviation) The distance of the linear laser beam on the area array CCD3 is obtained by the trigonometric function relationship. , please refer to the attached Figure 6 Similarly, if the deformed area is within the second reflection area, the laser needs to travel distance (the line beam laser will travel when there is no angle deviation) The distance that the line beam laser finally deviates on the area array CCD3 is Finally, the slope of the deformed area can be reversely calculated based on the offset distance of the broken area of the line beam laser on the area array CCD3. Even if the slope of the deformation is very small, the offset distance of the line beam laser on the area array CCD3 is magnified and becomes easier to observe, making the deformation measurement more accurate.
[0029] Embodiment 2: According to Figure 7 and Figure 8 As shown, the laser emitter 2 is a laser line projector formed by combining a laser emission system and a collimating lens group. The laser emitter 2 generates a spot beam laser through the laser emission system, and the laser emitter 2 expands the spot beam laser into a line beam laser through the collimating lens group. The direction of the line beam laser is perpendicular to the movement direction of the color-coated plate, and the plane size specification of the area array CCD3 is the same as the plane size specification of the laser emitter 2.
[0030] In this embodiment, in order to completely detect the deformation of the entire panel of the color-coated plate, the laser image needs to completely scan the entire surface of the color-coated plate. The line beam laser detection perpendicular to the movement direction of the color-coated plate can reflect the overall deformation of the color-coated plate in the simplest and most intuitive way. The laser emitter 2 is used to project at least three parallel line beam lasers to the reflection area. When a line beam laser is projected to the deformation area, it can form a reference with other line beam lasers to infer the degree of deformation of this line beam laser. After the point beam laser is emitted by the laser emission system, it is expanded into a line beam laser by the collimating lens group. It should be noted that after the action of the collimating lens group, the emission direction of the laser may no longer be parallel to the initial direction. If there is a direction deviation, a convex lens needs to be added to the outside of the collimating lens group to constrain the direction of the laser beam that is expanded outward, so that all the light rays of the line beam laser are emitted in a parallel state. After the parallel laser beam is reflected twice, its size and shape are consistent with the initial size and shape. Therefore, the line beam laser pattern displayed in the area array CCD3 is consistent with the line beam laser pattern emitted by the laser emitter 2.
[0031] Embodiment 3: According to Figure 7 and Figure 8 As shown, the reflective surfaces of the two reflective areas of the corner reflector 1 are both set as color-coated plate surfaces. The magnetic adsorption plate 8 is parallel to the ground or has an inclination angle of 45° to the ground. The plane where the laser emitter 2 and the area array CCD 3 are located is perpendicular to the plane where the angle bisectors of the two reflective areas of the corner reflector 1 are located.
[0032] In this embodiment, in order to improve the deformation detection effect of the color-coated plate, for the color-coated plate with good flatness, if the number of deformation areas on its surface is small, the two groups of color-coated plates can be deformed synchronously. At this time, the hard guide rails 5 and the conveyor belt 6 on both sides can be tilted through the aluminum profile base so that the angle with the ground is 45°, the laser emitter 2 and the area array CCD3 are placed on both sides directly above, and the color-coated plates are placed on the two reflection areas of the corner reflector 1, so that the two color-coated plates are perpendicular to each other, and the surfaces of the two color-coated plates form two reflection surfaces, and the linear beam laser emitted by the laser emitter 2 passes through the surfaces of the two color-coated plates in turn. If the surfaces of the two color-coated plates are both smooth, the light will be emitted from the laser emitter 2 according to the normal reflection route and return to the specified position in the area array CCD3, so that the linear beam laser maintains normal on the area array CCD3. Shape and proportion. On the contrary, when the line beam laser is twisted, broken, etc. in the area array CCD3, it is determined that the surface of at least one of the two reflective surfaces is uneven, and the deformed plate is identified below. One of the conveying mechanisms 4 is stopped, so that the surface of one color-coated plate continuously passes through the line beam laser irradiation area, and the surface of the other color-coated plate is relatively static with respect to the laser irradiation area. At this time, if the deformed position of the line beam laser received in the area array CCD3 moves accordingly, it means that the corresponding position of the moving color-coated plate is deformed. If the deformed position of the line beam laser is stationary, it means that the corresponding position of the stationary color-coated plate is deformed. The deformation area of the color-coated plate is quickly identified and confirmed, and the stationary color-coated plate is moved again until the next deformation area is detected in the area array CCD3. According to the above judgment criteria, the two color-coated plates are detected simultaneously to improve the detection effect.
[0033] Embodiment 4: According to Fig. 9 , Fig.10 and Fig.11 As shown, based on the deformation detection of the color-coated plate body, a conveying mechanism 4 with strong stability is proposed. The conveying mechanism 4 includes a hard guide rail 5 and a conveyor belt 6. Magnetic adsorption plates 8 are evenly spaced on the hard guide rail 5, and slots corresponding to the shape of the magnetic adsorption plates 8 are provided on both sides of the hard guide rail 5. The hard guide rail 5 is formed by a contact section 51 and a separation section 52 connected end to end. The slots on both sides of the contact section 51 are respectively provided with positive contacts and negative contacts. A coil is wound inside the magnetic adsorption plate 8, and the magnetic adsorption plate 8 forms a magnetic field when passing through the contact section 51. The conveyor belt 6 is located below the hard guide rail 5. Vertical push rods 7 are evenly spaced on the surface of the conveyor belt 6. The top of the vertical push rod 7 overlaps one side of the magnetic adsorption plate 8, and the bottom of the vertical push rod 7 is fixedly connected to the surface of the conveyor belt 6.
[0034] In this embodiment, since the surface of the conveyor belt 6 is tough, its tensioned state floats during transportation, and the up and down vibration effect caused by the tension change is inevitable. Therefore, using the conveyor belt 6 to directly drive the color-coated plate to move in a directional manner cannot meet the use requirements of the color-coated plate as a reflective surface. Based on the transmission requirements of the deformation detection device, the conveying mechanism 4 is used for smooth directional transportation, and the hard guide rail 5 and the magnetic adsorption plate 8 are used for card-joining, so that the magnetic adsorption plate 8 moves under directional restriction on the guide rail. Since the materials of the hard guide rail 5 and the magnetic adsorption plate 8 are both hard materials, the forced deformation is small, and there is almost no effect on the plane stability of the color-coated plate adsorbed above. When the color-coated plate receives the incident linear laser beam, the position of the reflective surface will not change due to translation, thereby reducing the impact on the detection result. Considering that the traditional clamping and fixing method is easy to cause surface stress deformation of the color-coated plate, the color-coated plate is fixed by adsorption connection to promote the directional movement of the color-coated plate. The adsorption connection includes negative pressure adsorption and magnetic adsorption. The suction cup is connected to the bottom surface of the color-coated plate to achieve negative pressure adsorption and fixation of the color-coated plate. The suction cup is made of soft material, and it is difficult to control the stability of the surface position of the color-coated plate. The magnetic adsorption plate 8 is connected to the bottom surface of the color-coated plate to achieve magnetic adsorption and fixation of the color-coated plate. The two ends of the magnetic adsorption plate 8 are connected through the card slot in the hard guide rail 5. The card slot fits the upper and lower surfaces of the magnetic adsorption plate 8 and the gap is small. At the contact position between the magnetic adsorption plate 8 and the hard guide rail 5, a material such as boron nitride is used as a coating to reduce the friction coefficient and reduce movement wear. Positive and negative contacts are set in the contact section 51, wherein the contact section 51 is located on the straight section where the corner reflector 1 is located, and the separation section 52 is located outside the straight section of the corner reflector 1, so that the magnetic adsorption plate 8 passes through the contact section 51, that is, contacts with the contacts at both ends, and the coil inside the magnetic adsorption plate 8 is energized. At this time, the magnetic adsorption plate 8 has an adsorption force on the color-coated plate above. When the magnetic adsorption plate 8 enters the separation section 52, the two ends of the magnetic adsorption plate 8 are separated from the positive and negative contacts respectively, and the coil inside the magnetic adsorption plate 8 is not charged, and will not generate a magnetic field to the surroundings. The magnetic adsorption plate 8 is detached from the surface of the color-coated plate, and the magnetic adsorption plate 8 moves cyclically in the circular tracks of the contact section 51 and the separation section 52, and continuously pushes the color-coated plate forward; A vertical push rod 7 is installed on the surface of the conveyor belt 6. The set interval of the vertical push rod 7 corresponds to the interval of the magnetic adsorption plate 8. The vertical push rod 7 is used to push the magnetic adsorption plate 8 to move, and compression deformation occurs at the contact point between the vertical push rod 7 and the magnetic adsorption plate 8. Since the vertical push rod 7 and the color-coated plate are connected with the magnetic adsorption plate 8 as an intermediate medium, the push of the vertical push rod 7 will not directly form compression on the color-coated plate, thereby avoiding interference with the test results of the color-coated plate.
[0035] The use method and working principle of this device: the corner reflector 1 has two mutually perpendicular reflection areas, and the hard guide rails 5 and conveyor belt 6 on both sides are placed on the ground at an angle of 45 degrees. The two reflection areas of the corner reflector 1 are both placed with color-coated plates as reflection surfaces, and the laser transmitter 2 and the area array CCD3 are placed on both sides directly above. The color-coated plate is placed on the surface of the magnetic adsorption plate 8 transported by the conveyor belt 6 for directional movement, and the hard guide rail 5 is formed by the contact section 51 and the separation section 52 connected end to end, and positive and negative contacts are provided on both sides of the card slot at the contact section 51. There is a coil inside the magnetic adsorption plate 8. When passing through the contact section 51, it is energized to generate a magnetic field to adsorb the color-coated plate. When entering the separation section 52, it is de-energized to detach from the color-coated plate, and it moves in this cycle; The vertical push rod 7 is used to push the magnetic adsorption plate 8 to move. Since the magnetic adsorption plate 8 is used as a medium between the vertical push rod 7 and the color-coated plate, the vertical push rod 7 is prevented from directly pressuring the color-coated plate to interfere with the detection result. At the same time, the hard guide rail 5 and the magnetic adsorption plate 8 are made of hard materials, and the forced deformation of the snap-fit is small, which ensures the plane stability of the color-coated plate. In addition, boron nitride and other coatings are used at the contact position to reduce the friction coefficient and reduce the movement wear. The laser emitter 2 is a laser line projector formed by combining a laser emission system and a collimating lens group. It first generates a spot laser beam, which is then expanded by a collimating lens group to become a line laser beam. The direction of the line laser beam is perpendicular to the movement direction of the color-coated plate. It emits three parallel line laser beams, which is convenient for mutual reference to estimate the degree of deformation of a certain line laser beam when it encounters a deformation area. The area array CCD3 is located on the other side of the reflection area and its laser receiving plane is in the same plane as the laser plane of the laser emitter 2. When light irradiates the PN junction, the photon energy is absorbed and electron-hole pairs are generated, thereby reflecting the shape of the laser image on the area array CCD3. According to the relationship between the offset position of the line laser beam and the degree of deformation of the color-coated plate, the slope of the deformation area is reversely calculated; The line beam laser returns to the area array CCD3 through two smooth color-coated plate surfaces along the normal reflection route, maintaining a normal shape and proportion; if distortion, breakage, etc. occurs, it is determined that at least one of the reflection surfaces is uneven, and one of the conveying mechanisms 4 is stopped, so that one color-coated plate is stationary relative to the laser irradiation area and the other moves, and it is observed whether the deformation position of the line beam laser received in the area array CCD3 moves, so as to identify the color-coated plate and the specific position where the deformed plate is located.
[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A color-coated plate deformation detection device, characterized in that: include: A corner reflector (1), the corner reflector (1) comprising two mutually perpendicular reflection areas, wherein the reflection surface of at least one reflection area is a color-coated plate surface; A laser emitter (2), the laser emitter (2) being located on one side of a reflection area, and the laser emitter (2) being used to emit a laser pattern toward the reflection area; An area array CCD (3), the area array CCD (3) being located on one side of the other reflection area, and the laser receiving plane of the area array CCD (3) and the laser plane of the laser transmitter (2) being located on the same plane; A conveying mechanism (4), wherein the conveying mechanism (4) is located below the color-coated plate and is used to carry the color-coated plate for directional movement.
2. A color-coated plate deformation detection device according to claim 1, characterized in that: The laser emitter (2) is a laser line projector formed by combining a laser emission system and a collimating lens group. The laser emitter (2) generates a spot beam laser through the laser emission system, and the laser emitter (2) expands the spot beam laser into a line beam laser through the collimating lens group.
3. A color-coated plate deformation detection device according to claim 2, characterized in that: The direction of the linear laser beam is perpendicular to the moving direction of the color-coated sheet.
4. The color-coated plate deformation detection device according to claim 1 is characterized in that: The planar size specification of the area array CCD (3) is the same as the planar size specification of the laser emitter (2).
5. The color-coated plate deformation detection device according to claim 1 is characterized in that: The conveying mechanism (4) comprises a hard guide rail (5) and a conveyor belt (6); a plurality of magnetic adsorption plates (8) are distributed at equal intervals on the hard guide rail (5); and slots corresponding to the shapes of the magnetic adsorption plates (8) are provided on both sides of the hard guide rail (5).
6. A color-coated plate deformation detection device according to claim 5, characterized in that: The hard guide rail (5) is formed by connecting a contact section (51) and a separation section (52) end to end, and the two side slots located at the position of the contact section (51) are respectively provided with a positive contact and a negative contact. A coil is wound inside the magnetic adsorption plate (8), and the magnetic adsorption plate (8) forms a magnetic field when passing through the contact section (51).
7. The color-coated plate deformation detection device according to claim 5, characterized in that: The conveyor belt (6) is located below the hard guide rail (5), and a plurality of vertical push rods (7) are evenly spaced on the surface of the conveyor belt (6). The top ends of the vertical push rods (7) overlap one side of the magnetic adsorption plate (8), and the bottom ends of the vertical push rods (7) are fixedly connected to the surface of the conveyor belt (6).
8. The color-coated plate deformation detection device according to claim 1 is characterized in that: The reflective surfaces of the two reflective areas of the corner reflector (1) are both arranged to be color-coated plate surfaces.
9. The color-coated plate deformation detection device according to claim 1, characterized in that: The color-coated panels are placed parallel to the ground or tilted at 45° to the ground.
10. The color-coated plate deformation detection device according to claim 1, characterized in that: The plane where the laser emitter (2) and the area array CCD (3) are located is perpendicular to the plane where the two reflection area angular bisectors of the corner reflector (1) are located.