CN117110317B - Automatic detection method for metal grid optical product in inclined state - Google Patents
Automatic detection method for metal grid optical product in inclined state Download PDFInfo
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- CN117110317B CN117110317B CN202311076083.8A CN202311076083A CN117110317B CN 117110317 B CN117110317 B CN 117110317B CN 202311076083 A CN202311076083 A CN 202311076083A CN 117110317 B CN117110317 B CN 117110317B
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- 238000001514 detection method Methods 0.000 title claims abstract description 191
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- 238000012546 transfer Methods 0.000 claims description 54
- 230000003595 spectral effect Effects 0.000 claims description 16
- 239000013072 incoming material Substances 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012634 optical imaging Methods 0.000 description 4
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- 230000007246 mechanism Effects 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0608—Height gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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Abstract
The invention discloses an automatic detection method of metal grid optical products in an inclined state, which is realized based on detection equipment, wherein the detection equipment comprises a first servo module, a vertical plate bracket driven by the first servo module to move forwards and backwards, an adjusting module arranged on the vertical plate bracket, an inclined plane supporting plate rotatably arranged on the vertical plate bracket and connected with an adjusting movable end of the adjusting module at one side, a second servo module fixed on the inclined plane supporting plate, a supporting column driven by the second servo module to move left and right, a third servo module fixed on the supporting column, a mounting plate driven by the third servo module to move up and down parallel to the surface of the inclined plane supporting plate, a detection camera fixed on the mounting plate and a spectrum confocal sensor fixed on the mounting plate. The invention can quickly, efficiently and accurately acquire clear image information aiming at the large-size metal grid optical product in an inclined state, and complete defect detection.
Description
[ field of technology ]
The invention belongs to the technical field of visual detection, and particularly relates to an automatic detection method for metal grid optical products in an inclined state.
[ background Art ]
With the development of technology, touch screens have been widely used in various electronic products. With the gradual increase of the yield of domestic panel manufacturers, large-size touch will become an important direction of future development.
A Metal Mesh optical product (Metal Mesh) is a conductive material, and on a substrate such as PET, COP, PC, through various processes, extremely fine Metal Mesh lines are formed, and the line width of the Mesh lines is generally smaller than 10 μm and is basically invisible to naked eyes. The Metal grid lines on the surface of the Metal Mesh material replace ITO on the surface of the ITO material, the conductive effect is far better than that of the traditional ITO, and the advantages of the Metal grid optical product are more outstanding in the field of medium-and-large-size touch and curved-surface touch.
In the process of manufacturing the metal grid optical product, defect detection is needed, the defect detection of the optical product is manually performed by the traditional technology, the product is sequentially observed and detected by a manual handheld magnifying glass, the detection efficiency is low, and the phenomenon of manual misjudgment or omission is easy to occur. With the development of vision cameras, defect detection by using a vision detection system has been popular gradually, such as a cover plate detection device disclosed in the prior art with patent publication No. CN207779916U, an automatic focusing control method for panel detection disclosed in the prior art with patent publication No. CN113219618B, and a panel defect detection method, which greatly improve the defect detection efficiency of a touch panel.
At present, a large-size metal grid optical product is provided, the size of the large-size metal grid optical product is 800 multiplied by 700mm, and in the detection preamble process, the whole metal grid optical product is placed on a jig in an inclined state; on the one hand, the optical product has larger size, and the camera cannot take a photo once to acquire the image of the surface of the whole optical product, so that the photo needs to be taken for multiple times, and the detection efficiency is low; on the other hand, as the incoming materials of the optical products are placed on the jig in an inclined state, due to the manufacturing error of the jig and the sheet material characteristics of the optical products, certain deviation exists in the planeness of the whole surface of the optical products, and certain deviation exists in the inclination angle of the surface of the optical products, so that the positions of the optical products detected by each incoming material are not uniform; moreover, because the depth of field of the detection camera is smaller, the manufacturing error of the jig and the deformation error of the self-tilting state of the optical product can possibly lead to the detection camera not to obtain clear image information. The patent publication No. CN113219618B discloses an automatic focusing control method for panel detection and a panel defect detection method, which are characterized in that a first position detection device is provided to detect the position of a driving motor in real time, a second position detection device is provided to detect the position of an optical imaging system in real time, and only one method for realizing high-precision automatic focusing is provided, if the method is directly applied to defect detection of the large-size metal grid optical product, the following disadvantages exist: 1) The method comprises the steps that a metal grid optical product needs to be photographed for multiple times to obtain images, a first position detection device is needed to obtain first position information of a driving motor every time, then whether the position information meets requirements is judged, if yes, a second position detection device is needed to obtain second position information of an optical imaging system, then the driving motor is controlled to drive the optical imaging system to move to a focusing position according to the second position information and the focusing position to achieve accurate automatic focusing, the number of internal control steps is large, single automatic focusing consumes longer time, and when the whole metal grid optical product is detected, the whole time is long, and the detection efficiency is low; 2) Because the metal grid optical products with different sizes or models have different overall inclination angles in the process of manufacturing, the installation angles of the optical imaging system are required to be correspondingly reset for the detection of the optical products with different inclination angles, and the time and the labor are wasted.
Therefore, it is necessary to provide a new automatic detection method for metal mesh optical products in an inclined state to solve the above technical problems.
[ invention ]
The invention mainly aims to provide an automatic detection method for metal grid optical products in an inclined state, which can quickly, efficiently and accurately acquire clear image information aiming at large-size metal grid optical products in an inclined state and finish defect detection.
The invention realizes the aim through the following technical scheme: the automatic detection method for the metal grid optical product in the inclined state is realized on the basis of detection equipment, wherein the detection equipment comprises a rack and a detection unit arranged on the rack, the detection unit comprises a first servo transfer module fixed on the rack, a vertical plate bracket driven by the first servo transfer module to move forwards and backwards, an adjusting module arranged on the vertical plate bracket, an inclined plane supporting plate rotatably arranged on the vertical plate bracket while the other opposite side is connected with an adjusting movable end of the adjusting module, a second servo transfer module fixed on the inclined plane supporting plate, a supporting column driven by the second servo transfer module to move left and right, a third servo transfer module fixed on the supporting column, a mounting plate driven by the third servo transfer module to move up and down parallel to the surface of the inclined plane supporting plate, a detection camera fixed on the mounting plate and horizontally arranged on the detection surface and a spectrum confocal sensor fixed on the mounting plate;
the detection method comprises the following steps:
s1, acquiring the size of a metal grid optical product to be detected and the coverage area of single shooting of a detection camera, and acquiring inclination angle information of the metal grid optical product when the metal grid optical product is fed on a detection jig;
s2, dividing the metal grid optical product to be detected into a plurality of detection areas according to the coverage area of single photographing of the detection camera, so that the photos obtained by the detection camera on each detection area can be spliced together to completely cover the whole surface to be detected of the metal grid optical product to be detected;
s3, the adjusting module adjusts the inclination angle of the inclined support plate according to the inclination angle information, so that the inclination angle of the inclined support plate is consistent with the inclination angle information;
s4, placing a calibration plate at a position with a set distance in front of the inclined plane supporting plate, simulating the incoming material of the metal grid optical product to be detected, driving the vertical plate support to move to a set first position by the first servo transfer module, starting an automatic deviation correcting program by the upper computer, and sending a command to the PLC, controlling the first servo transfer module to finely adjust the position of the vertical plate support by the PLC to finish automatic focusing operation, acquiring the height H0 of the relative position between the position and the surface of the calibration plate by the spectral confocal sensor, recording the second position of the vertical plate support by the PLC, removing the calibration plate, and returning the vertical plate support to the original position;
s5, sensing that the product to be detected moves in place through a proximity sensor and feeds back to the PLC, wherein the first servo transfer module drives the vertical plate bracket to move to the second position along with the fact that the detection jig reaches the set position in front of the inclined plane supporting plate in an inclined state;
s6, the second servo transfer module and the third servo transfer module jointly act to drive the detection camera to move to the center position of the first detection area, the spectral confocal sensor detects that the height of the relative position of the surface of the first detection area is H1 and feeds the height to the PLC, the PLC calculates the difference between H1 and H0, if the difference is 0, the position of the detection camera is not required to be adjusted, and the detection camera shoots to obtain a detection image of the first detection area; otherwise, the first servo transfer module performs position compensation on the position of the vertical plate support according to the difference value between H1 and H0, so that the detection camera is located at an optimal photographing position away from the surface of the first detection area, and the detection camera photographs to obtain a detection image of the first detection area;
s7, repeating the step S6, sequentially completing detection image acquisition of all detection areas, and uploading the detection images to the upper computer; the defect detection software in the upper computer automatically judges the acquired image to finish defect detection;
s8, after the product to be detected is detected, the vertical plate support is retracted to a safe position with the detection camera, and the detected metal grid optical product with the detection jig is withdrawn from the detection equipment and transferred to the next station.
Further, the device also comprises a protective hood which covers the detection unit and forms a detection space.
Furthermore, one side of the protective hood is of an open structure, the detection jig is abutted, and the metal grid optical product to be detected is placed on the detection jig in an inclined state.
Further, the adjusting module comprises an adjusting screw fixedly connected with the back of the inclined plane supporting plate and a driving piece which is fixed on the vertical plate bracket and drives the adjusting screw to conduct telescopic movement.
Further, a hinge seat is arranged on the vertical plate support, and the inclined plane support plate is rotatably arranged on the hinge seat through a pin shaft.
Further, the device also comprises an upper computer electrically connected with the detection camera, and defect detection software is installed in the upper computer.
Further, the system also comprises a PLC controller electrically connected with the first servo transfer module and the spectral confocal sensor, and the PLC controller is in signal connection with the upper computer.
Further, an automatic deviation correcting program is arranged in the upper computer, the automatic deviation correcting program comprises a step of commanding the first servo transfer module to perform point position running on a set track according to a set feeding amount, the detection camera obtains an image photo on each running point, then obtains the resolution of the image photo on each running point, selects the image photo with the highest resolution, and simultaneously records the running point coordinate corresponding to the image photo, wherein the running point coordinate is the optimal distance position between the detection camera and the surface of the shot object when the detection camera shoots.
Compared with the prior art, the automatic detection method for the metal grid optical product in the inclined state has the beneficial effects that: the method can quickly, efficiently and accurately acquire clear image information aiming at the large-size metal grid optical product in the inclined state, and completes defect detection. Specifically, by arranging the vertical plate support which moves horizontally, the inclined support plate which can adjust the inclination angle is arranged on the vertical plate support so as to match the defect detection of the incoming materials of the metal grid optical products with different inclination angles, the adjustment is convenient, and the automatic adjustment can be realized; a detection camera for carrying out two-dimensional plane transfer is arranged on the inclined support plate, the surface of a product to be detected is divided into a plurality of detection areas according to the single photographing coverage area of the detection camera and the surface size of the product to be detected, and the two-dimensional transfer mechanism is used for driving the detection camera to realize two-dimensional transfer movement on the inclined support plate parallel to the surface of the product to be detected, so that all detection areas can be covered quickly and accurately, and further defect detection of large-size metal grid optical products can be realized quickly and efficiently; meanwhile, a sensor which synchronously moves with the detection camera and is used for detecting the height of the relative position of the surface of the product to be detected is arranged beside the detection camera, and the sensor adopts a spectral confocal sensor, so that the reliability and the accuracy of detecting the height of the relative position of the surface to be detected are greatly improved; meanwhile, the spectral confocal sensor feeds back the relative position height of the surface of each detection area in real time, and the position adjustment of the detection camera is realized by matching with the horizontal servo transfer mechanism, so that the definition of the image acquired by the detection camera is ensured, and an important foundation is laid for accurately and reliably realizing defect discrimination.
[ description of the drawings ]
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a detecting unit according to an embodiment of the present invention;
FIG. 3 is a schematic side view of a detecting unit according to an embodiment of the present invention;
FIG. 4 is a schematic view of another angle structure of the detecting unit according to the embodiment of the present invention;
FIG. 5 is a flow chart of a detection method according to an embodiment of the invention;
the figures represent the numbers:
100-automatic detection equipment of metal grid optical products in an inclined state;
1-a frame;
the device comprises a 2-detection unit, a 21-first servo transfer module, a 22-vertical plate bracket, a 221-hinging seat, a 222-pin shaft, a 23-adjusting module, a 231-adjusting screw, a 232-driving piece, a 24-inclined plane supporting plate, a 25-second servo transfer module, a 26-supporting upright post, a 27-third servo transfer module, a 28-mounting plate, a 29-detection camera and a 210-spectrum confocal sensor;
3-protective hood.
[ detailed description ] of the invention
Embodiment one:
referring to fig. 1-5, the present embodiment is an automatic metal mesh optical product detection apparatus 100 in an inclined state, which includes a frame 1, a detection unit 2 disposed on the frame 1, and a protective hood 3 covering the detection unit 2 to form a detection space.
One side of the protective hood 3 is of an open structure, is abutted against a jig to be detected, and the metal grid optical product to be detected is placed on the detecting jig in a large-angle inclined state.
The detection unit 2 comprises a first servo transfer module 21 fixed on the frame 1, a vertical plate support 22 driven by the first servo transfer module 21 to move back and forth, an adjusting module 23 arranged on the vertical plate support 22, a bevel support plate 24 rotatably arranged on the vertical plate support 22 and connected with the adjusting movable end of the adjusting module 23 at the other opposite side, a second servo transfer module 25 fixed on the bevel support plate 24, a support column 26 driven by the second servo transfer module 25 to move left and right, a third servo transfer module 27 fixed on the support column 26, a mounting plate 28 driven by the third servo transfer module 27 to move up and down parallel to the surface of the bevel support plate 24, a detection camera 29 fixed on the mounting plate 28 and provided with a detection surface arranged horizontally outwards, and a spectrum confocal sensor 210 fixed on the mounting plate 28.
The adjusting module 23 comprises an adjusting screw 231 fixedly connected with the back surface of the inclined support plate 24 and a driving piece 232 fixed on the vertical plate bracket 22 and driving the adjusting screw 231 to perform telescopic movement. In this embodiment, the driving member 232 is a rotating hand wheel, and the tooth structure on the rotating hand wheel is meshed with the tooth structure on the adjusting screw 231, so that the telescopic movement of the adjusting screw 231 can be realized by rotating the hand wheel, and further one side of the inclined support plate 24 is driven to rotate around the other opposite side, so as to realize the adjustment of the inclination angle of the inclined support plate 24.
In other embodiments, the driving member 232 may be driven by a servo motor to automatically adjust the inclination angle of the bevel support plate 24.
The vertical plate bracket 22 is provided with a hinge seat 221, and the inclined support plate 24 is rotatably arranged on the hinge seat 221 through a pin shaft 222.
Through the slope setting of inclined plane backup pad 24 for the two-dimensional removal plane of detection camera 29 can be parallel with the surface of the metal mesh optical product that waits to detect, reduces the servo moving distance and the position adjustment process of moving the module, establishes the basis for improving detection efficiency.
Because the surface of the metal grid optical product is provided with a layer of light-transmitting material layer and has light transmission, and the phenomenon that the surface of a product to be detected cannot be sensed exists by adopting a conventional position sensor or a laser sensor, the highest measurement precision of the spectral confocal sensor 210 can reach 14nm by adopting the spectral confocal sensor 210, the surface of an object of any material can be measured, and the super-strong angle characteristic can be realized for the surface of a mirror surface, a transparent or semitransparent body, so that the technical problem that the light-transmitting material on the surface of the metal grid optical product cannot be sensed easily is effectively solved. The distance from the detection camera 29 to the surface of the metal grid optical product is detected by the spectral confocal sensor 210, so that the stability and the detection precision of the surface of the object to be detected are greatly improved, and an adjustment basis is provided for the fine adjustment of the position of the detection camera 29.
The spectral confocal sensor 210 is used for detecting the distance of the surface of the object to be detected, so that the problem of surface unevenness caused by manufacturing errors of an incoming material jig or unevenness of the surface of a large-size metal grid optical product or deformation of the optical product caused by the inclined state under the action of dead weight can be effectively solved, and a guarantee is provided for the detection camera 29 to acquire clear images.
In this embodiment, the spectral confocal sensor 210 and the detection camera 29 are disposed on the mounting plate 28 together, and the relative positions of the two are fixed, and the first servo transfer module 21 is used for driving the entire vertical plate support 22 to move horizontally, so as to adjust the distance between the detection camera 29 and the surface of the product to be detected, and ensure that the detection camera 29 can obtain a clear detection image within the depth of field range. The second servo transfer module 25 and the third servo transfer module 27 form a transfer drive of the detection camera 29 in a plane parallel to the surface of the product to be detected, so as to realize automatic and efficient detection of the large-size metal grid optical product.
The embodiment further includes an upper computer (not shown) electrically connected to the detecting camera 29, and defect detecting software is installed in the upper computer.
The embodiment further includes a PLC controller (not shown) electrically connected to the first servo transfer module 21 and the spectral confocal sensor 210, where the PLC controller is in signal connection with the upper computer. The height data collected by the spectral confocal sensor 210 is transmitted to the PLC controller, and the PLC controller performs distance compensation on the detection camera 29 according to the current height data, and controls the first servo transfer module 21 to drive the detection camera 29 to move close to or away from the surface of the product to be detected, so that the detection camera 29 can capture a clear image. An automatic deviation correcting program is arranged in the upper computer and is used for realizing automatic focusing deviation correction of the detection camera 29. Specifically, the automatic deviation correcting program includes commanding the first servo transfer module 21 to perform point position running on a set track according to a set feeding amount, acquiring an image photo by the detection camera 29 on each running point, then acquiring the resolution of the image photo on each running point, selecting the image photo with the highest resolution, and simultaneously recording the coordinates of the running point corresponding to the image photo, where the coordinates of the running point are the optimal distance positions between the detection camera 29 and the surface of the photographed object when photographing.
The embodiment also provides an automatic detection method of the metal grid optical product in an inclined state, which comprises the following steps:
s1, acquiring the size of a metal grid optical product to be detected and the coverage area of single shooting of a detection camera 29, and acquiring inclination angle information of the metal grid optical product when the metal grid optical product is fed on a detection jig;
s2, dividing the metal grid optical product to be detected into a plurality of detection areas S according to the coverage area of single photographing of the detection camera 29, so that the photos obtained by the detection camera 29 on each detection area S can be spliced together to completely cover the whole surface to be detected of the metal grid optical product to be detected;
s3, adjusting the inclination angle of the inclined support plate 24 by the adjusting module 23 according to the inclination angle information, so that the inclination angle of the inclined support plate 24 is consistent with the inclination angle information;
s4, placing a calibration plate at a position with a set distance in front of the inclined support plate 24, simulating the incoming material of the metal grid optical product to be detected, driving the vertical plate support 22 to move to a set first position by the first servo transfer module 25, starting an automatic deviation correcting program by the upper computer and sending a command to the PLC, controlling the first servo transfer module 25 to finely adjust the position of the vertical plate support 22 by the PLC, finely adjusting the focal length of the detection camera 29 and confirming the definition of an image on a display screen until a clear image is obtained, completing automatic focusing operation, acquiring the relative position height H0 from the surface of the calibration plate by the spectrum confocal sensor 210, recording the second position of the vertical plate support 22 at the moment by the PLC, and then removing the calibration plate, and retracting the vertical plate support 22 to the original position;
s5, the metal grid optical product to be detected is in an inclined state, and moves to a position in front of the inclined plane supporting plate 24 along with the detection jig, the product to be detected is sensed to move to a position through the proximity sensor and fed back to the PLC, and the first servo transfer module 25 drives the vertical plate bracket 22 to move to the second position;
s6, the second servo transfer module 25 and the third servo transfer module 27 jointly act to drive the detection camera 29 to move to the center position of the first detection area S1, meanwhile, the spectral confocal sensor 210 detects the relative position height H1 of the surface of the first detection area S1 and feeds the relative position height H1 back to the PLC, the PLC calculates the difference between H0 and H1, if the difference is 0, the position of the detection camera 29 is not required to be adjusted, and the detection camera 29 shoots to obtain a detection image of the first detection area S1; otherwise, the first servo transfer module 25 performs position compensation on the position of the vertical support 22 according to the difference between H0 and H1, so that the detection camera 29 is located at the optimal photographing position from the surface of the first detection area S1, and the depth of field of the detection camera 29 is ensured to be enough, and the photographed image can be clearly distinguished;
s7, repeating the step S6, sequentially completing the picture acquisition of all the detection areas, and uploading the pictures to the upper computer; the defect detection software in the upper computer automatically judges the acquired pictures to realize defect detection;
and S8, after the product to be detected is detected, the vertical plate support 22 is retracted to a safe position with the detection camera, and the detected metal grid optical product is withdrawn from the detection equipment with the detection jig and is transferred to the next station.
It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.
Claims (8)
1. An automatic detection method for metal grid optical products in an inclined state is characterized by comprising the following steps of: the detection device comprises a frame, a detection unit arranged on the frame, wherein the detection unit comprises a first servo transfer module fixed on the frame, a vertical plate support driven by the first servo transfer module to move back and forth, an adjusting module arranged on the vertical plate support, an inclined plane supporting plate rotatably arranged on the vertical plate support while the other opposite side is connected with an adjusting movable end of the adjusting module, a second servo transfer module fixed on the inclined plane supporting plate, a supporting column driven by the second servo transfer module to move left and right, a third servo transfer module fixed on the supporting column, a mounting plate driven by the third servo transfer module to move up and down parallel to the surface of the inclined plane supporting plate, a detection camera fixed on the mounting plate and with a detection surface arranged horizontally outwards, and a spectrum confocal sensor fixed on the mounting plate;
the detection method comprises the following steps:
s1, acquiring the size of a metal grid optical product to be detected and the coverage area of single shooting of a detection camera, and acquiring inclination angle information of the metal grid optical product when the metal grid optical product is fed on a detection jig;
s2, dividing the metal grid optical product to be detected into a plurality of detection areas according to the coverage area of single photographing of the detection camera, so that the photos obtained by the detection camera on each detection area can be spliced together to completely cover the whole surface to be detected of the metal grid optical product to be detected;
s3, the adjusting module adjusts the inclination angle of the inclined support plate according to the inclination angle information, so that the inclination angle of the inclined support plate is consistent with the inclination angle information;
s4, placing a calibration plate at a position with a set distance in front of the inclined plane supporting plate, simulating the incoming material of the metal grid optical product to be detected, driving the vertical plate support to move to a set first position by the first servo transfer module, starting an automatic deviation correcting program by the upper computer, and sending a command to the PLC, controlling the first servo transfer module to finely adjust the position of the vertical plate support by the PLC to finish automatic focusing operation, acquiring the height H0 of the relative position between the position and the surface of the calibration plate by the spectral confocal sensor, recording the second position of the vertical plate support by the PLC, removing the calibration plate, and returning the vertical plate support to the original position;
s5, sensing that the product to be detected moves in place through a proximity sensor and feeds back to the PLC, wherein the first servo transfer module drives the vertical plate bracket to move to the second position along with the fact that the detection jig reaches the set position in front of the inclined plane supporting plate in an inclined state;
s6, the second servo transfer module and the third servo transfer module jointly act to drive the detection camera to move to the center position of the first detection area, the spectral confocal sensor detects that the height of the relative position of the surface of the first detection area is H1 and feeds the height to the PLC, the PLC calculates the difference between H1 and H0, if the difference is 0, the position of the detection camera is not required to be adjusted, and the detection camera shoots to obtain a detection image of the first detection area; otherwise, the first servo transfer module performs position compensation on the position of the vertical plate support according to the difference value between H1 and H0, so that the detection camera is located at an optimal photographing position away from the surface of the first detection area, and the detection camera photographs to obtain a detection image of the first detection area;
s7, repeating the step S6, sequentially completing detection image acquisition of all detection areas, and uploading the detection images to the upper computer; the defect detection software in the upper computer automatically judges the acquired image to finish defect detection;
s8, after the product to be detected is detected, the vertical plate support is retracted to a safe position with the detection camera, and the detected metal grid optical product with the detection jig is withdrawn from the detection equipment and transferred to the next station.
2. The automatic detection method for metal mesh optical product in an inclined state according to claim 1, wherein: the detection device further comprises a protective hood which covers the detection unit and forms a detection space.
3. The automatic detection method for metal mesh optical product in an inclined state according to claim 2, wherein: one side of the protection hood is of an open structure, the detection jig is abutted, and the metal grid optical product to be detected is placed on the detection jig in an inclined state.
4. The automatic detection method for metal mesh optical product in an inclined state according to claim 1, wherein: the adjusting module comprises an adjusting screw fixedly connected with the back of the inclined support plate and a driving piece which is fixed on the vertical plate support and drives the adjusting screw to conduct telescopic movement.
5. The automatic detection method for metal mesh optical product in an inclined state according to claim 1, wherein: the vertical plate support is provided with a hinge seat, and the inclined support plate is rotatably arranged on the hinge seat through a pin shaft.
6. The automatic detection method for metal mesh optical product in an inclined state according to claim 1, wherein: the system also comprises an upper computer electrically connected with the detection camera, wherein defect detection software is installed in the upper computer.
7. The automatic detection method for metal mesh optical product in an inclined state according to claim 6, wherein: the system also comprises a PLC controller electrically connected with the first servo transfer module and the spectral confocal sensor, and the PLC controller is in signal connection with the upper computer.
8. The automatic detection method for metal mesh optical product in an inclined state according to claim 7, wherein: the automatic deviation correcting program is arranged in the upper computer and comprises the steps of commanding the first servo transfer module to perform point position running on a set track according to a set feed amount, acquiring an image photo by the detection camera on each running point, then acquiring the resolution of the image photo on each running point, selecting the image photo with the highest resolution, and simultaneously recording the running point coordinates corresponding to the image photo, wherein the running point coordinates are the optimal distance positions between the detection camera and the surface of the shot object when shooting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311076083.8A CN117110317B (en) | 2023-08-24 | 2023-08-24 | Automatic detection method for metal grid optical product in inclined state |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311076083.8A CN117110317B (en) | 2023-08-24 | 2023-08-24 | Automatic detection method for metal grid optical product in inclined state |
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| WO2020048148A1 (en) * | 2018-09-03 | 2020-03-12 | 浙江大学 | Surface defect measurement method based on spectral confocal sensor |
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| CN113219618A (en) * | 2021-03-19 | 2021-08-06 | 哈工大机器人(中山)无人装备与人工智能研究院 | Automatic focusing control method for panel detection and panel defect detection method |
| WO2021196419A1 (en) * | 2020-03-30 | 2021-10-07 | 孙亮 | Metering-level 3d super-depth-of-field microscopic system and measurement method |
| CN114486912A (en) * | 2022-01-17 | 2022-05-13 | 合肥知常光电科技有限公司 | Optical element defect detection device and method based on line spectral confocal technology |
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| WO2020048148A1 (en) * | 2018-09-03 | 2020-03-12 | 浙江大学 | Surface defect measurement method based on spectral confocal sensor |
| CN109827972A (en) * | 2019-03-28 | 2019-05-31 | 中核建中核燃料元件有限公司 | A kind of device and its detection method for nuclear fuel rod Surface testing |
| CN211651535U (en) * | 2020-03-30 | 2020-10-09 | 阳宇春 | Metering-grade 3D ultra-depth-of-field confocal microscope system |
| WO2021196419A1 (en) * | 2020-03-30 | 2021-10-07 | 孙亮 | Metering-level 3d super-depth-of-field microscopic system and measurement method |
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