CN112461854B - Intelligent optimization cover plate final inspection AOI detection method and device - Google Patents
Intelligent optimization cover plate final inspection AOI detection method and device Download PDFInfo
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Abstract
The invention relates to the technical field of visual inspection, in particular to a method and a device for intelligent optimization of cover plate final inspection AOI (automatic inspection) detection, wherein the method comprises the following steps: presetting a detection strategy corresponding relation of the cover plate according to cover plate type information comprising model, size and thickness, and presetting the detection strategy corresponding relation into a controller of a cover plate detection work line; receiving a cover plate to be detected, acquiring cover plate type information of the cover plate to be detected, and comparing the cover plate type information with the corresponding relation of the detection strategy to obtain the detection strategy; placing the cover plate to be detected on an area array detection assembly for detection; the cover plate to be detected is placed at a dark field detection assembly to move for detection; transmitting the rotation direction of the cover plate to be detected after dark field detection to a bright-dark field detection assembly; detection is performed at the bright-dark field detection component. The cover plate can be intelligently and comprehensively detected, the reliability of detection results is guaranteed, the cover plate detection process is finished at one time, and the detection efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of visual inspection, in particular to a method and a device for intelligent optimization of cover plate final inspection AOI (automatic inspection) detection.
Background
At present, CG cover boards (glass covers of terminal equipment) are often processed in multiple processes during the production process, and each process generates various appearance defects, so that inspection of CG cover board products is required.
Traditional CG apron outward appearance defect detection is carried out through the manual work, and the inspection effect is not ideal. With the development of technology, CG cover plate detection devices have emerged. Because CG apron product includes parts such as visual area, printing ink district, arc limit, and the defect of each part of CG apron can not effectively be detected to the common CG apron check out test set in market, leads to the testing result unreliable, brings very big trouble for CG apron production. Moreover, the CG cover plates corresponding to different types and different types of terminal equipment are different in size, material, thickness and other characteristics, for example, the sizes of a 5.5-inch mobile phone and a tablet personal computer are different, the requirements of different types of terminals on the CG cover plates are different, the corresponding CG cover plate detection modes and detection positions are different, the detection means for manually adjusting the CG cover plates are also a laborious process, and if the types of the CG cover plates are more, errors are easy to occur in the process of manually switching the detection means.
Accordingly, there is a need in the industry for a solution to the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a method and a device for intelligently optimizing cover plate final inspection AOI detection aiming at the defects of the prior art. The object of the present invention can be achieved by the following technical means.
The invention provides a method for intelligently optimizing cover plate final inspection AOI detection, which comprises the following steps:
presetting a detection strategy corresponding relation of the cover plate according to cover plate type information comprising model, size and thickness, and presetting the detection strategy corresponding relation into a controller of a cover plate detection work line;
receiving a cover plate to be detected, acquiring cover plate type information of the cover plate, comparing the cover plate type information with the detection strategy to obtain a detection strategy, and obtaining an area array detection strategy, a dark field detection strategy, a rotation strategy and a bright-dark field detection strategy according to the detection strategy;
placing the cover plate to be detected on an area array detection assembly according to the area array detection strategy for detection;
according to the dark field detection strategy, the cover plate to be detected is placed at a dark field detection assembly to move for detection;
transmitting the rotation direction of the cover plate to be detected after dark field detection to a bright-dark field detection assembly according to the rotation strategy;
detection is performed at the bright-dark field detection component.
Optionally, the method further includes:
presetting a corresponding relation between a cover plate type, a rotation strategy and the pulse number of a rotary encoder in the cover plate detection working line;
according to the cover plate type information of the cover plate to be detected and the rotation strategy, a corresponding rotary encoder is obtained to acquire pulse numbers, the transmission speed of the magnetic force roller is monitored through encoder pulses, and the linear scanning camera is matched; wherein, the matching relation is: encoder pulse count = magnetometric roller circumference/line scan camera minimum pixel precision.
Optionally, the detection tool line includes a feeding component, a transferring component, an area array detection component, a dark field detection component, a bright and dark field detection component, a magnetic force transmission component and a rotating component, wherein the feeding component, the area array detection component, the dark field detection component and the bright and dark field detection component are sequentially arranged from an input end to an output end.
Optionally, the method further includes:
recording detection results of an area array detection result, a dark field detection result and a bright and dark field detection result in each cover plate to be detected according to the cover plate type information;
dividing the detection result into training detection data and checking detection data corresponding to the cover plate type information according to a preset classification strategy;
constructing a cover plate detection training model by utilizing the training detection data based on a preset cover plate detection function;
when the cover plate detection training model is successfully verified by the verification detection data, a corresponding estimated detection result is obtained according to the cover plate detection training model and the cover plate type information of the cover plate to be detected;
and acquiring the corresponding detection strategy according to the estimated detection result.
Optionally, the method further includes:
detecting whether the edge breakage and angle breakage defect occurs on the arc edge of the cover plate to be detected on the area array detection assembly;
performing transverse line scanning detection at the dark field detection assembly, and detecting whether scratches appear in the transverse direction of the cover plate to be detected and whether the scratches appear in an error range;
and detecting whether the front surface and the back surface of the cover plate to be detected are stained or not according to the bright-dark field detection strategy at the bright-dark field detection assembly, and detecting whether scratches appear in the longitudinal direction of the cover plate to be detected and whether the scratches appear in the error range or not by performing longitudinal line scanning detection.
On the other hand, the invention also provides a device for intelligently optimizing the end inspection AOI detection of the cover plate, which comprises the following components: the device comprises a detection setting module, a detection strategy selection module, an area array detection control module, a dark field detection control module, a rotary transmission control module and a bright and dark field detection control module; wherein the method comprises the steps of
The detection setting module presets a detection strategy corresponding relation of the cover plate according to the type information of the cover plate comprising the type, the size and the thickness of the cover plate, and presets the detection strategy corresponding relation into a controller of a cover plate detection working line;
the detection strategy selection module is connected with the detection setting module, receives a to-be-detected cover plate, acquires cover plate type information of the to-be-detected cover plate, compares the to-be-detected cover plate type information with the detection strategy correspondence to obtain a detection strategy, and obtains an area array detection strategy, a dark field detection strategy, a rotation strategy and a bright and dark field detection strategy according to the detection strategy;
the area array detection control module is connected with the detection strategy selection module, and the cover plate to be detected is placed on an area array detection assembly for detection according to the area array detection strategy;
the dark field detection control module is connected with the detection strategy selection module and the area array detection control module, and the cover plate to be detected is placed at the dark field detection assembly to move for detection according to the dark field detection strategy;
the rotation transmission control module is connected with the detection strategy selection module and the dark field detection control module, and transmits the rotation direction of the cover plate to be detected after dark field detection to a bright-dark field detection assembly according to the rotation strategy;
the bright-dark field detection control module is connected with the detection strategy selection module and the rotary transmission control module and is used for detecting at the bright-dark field detection assembly.
Optionally, the apparatus further includes: the rotation control parameter acquisition module is connected with the rotation transmission control module, and preset the corresponding relation between the type of the cover plate, the rotation strategy and the pulse number of the rotary encoder in the cover plate detection line;
according to the cover plate type information of the cover plate to be detected and the rotation strategy, a corresponding rotary encoder is obtained to acquire pulse numbers, the transmission speed of the magnetic force roller is monitored through encoder pulses, and the linear scanning camera is matched; wherein, the matching relation is: encoder pulse count = magnetometric roller circumference/line scan camera minimum pixel precision.
Optionally, the detection tool line includes a feeding component, a transferring component, an area array detection component, a dark field detection component, a bright and dark field detection component, a magnetic force transmission component and a rotating component, wherein the feeding component, the area array detection component, the dark field detection component and the bright and dark field detection component are sequentially arranged from an input end to an output end.
Optionally, the apparatus further includes: the detection strategy training module is connected with the detection strategy selection module, and records detection results of an area array detection result, a dark field detection result and a bright and dark field detection result in each cover plate to be detected according to the cover plate type information;
dividing the detection result into training detection data and checking detection data corresponding to the cover plate type information according to a preset classification strategy;
constructing a cover plate detection training model by utilizing the training detection data based on a preset cover plate detection function;
when the cover plate detection training model is successfully verified by the verification detection data, a corresponding estimated detection result is obtained according to the cover plate detection training model and the cover plate type information of the cover plate to be detected;
and acquiring the corresponding detection strategy according to the estimated detection result.
Optionally, the area array detection control module is configured to detect, on the area array detection assembly, whether an edge collapse or an angle collapse defect occurs on an arc edge of the cover plate to be detected;
the dark field detection control module is used for conducting transverse line scanning detection at the dark field detection assembly and detecting whether scratches appear in the transverse direction of the cover plate to be detected or not and whether the scratches appear in the error range or not;
the bright-dark field detection control module is used for detecting whether the front face and the back face of the cover plate to be detected are stained or not according to the bright-dark field detection strategy at the bright-dark field detection assembly, and detecting whether scratches appear in the longitudinal direction of the cover plate to be detected or not and whether the scratches appear in the longitudinal direction of the cover plate to be detected or not in an error range or not by longitudinal line scanning detection.
Compared with the prior art, the invention has the beneficial effects that:
according to the intelligent cover plate final inspection AOI device and the intelligent cover plate final inspection AOI detection method, an intelligent detection means switching strategy is set according to the characteristics of the cover plate, the cover plate is subjected to area array detection, dark field detection and bright-dark field detection in sequence, and appearance defects of arc edges, visible areas, ink areas and other parts of the cover plate can be detected, so that the cover plate can be comprehensively and completely detected, the reliability of detection results is ensured, the cover plate detection flow is finished at one time, the detection efficiency is greatly improved, the error rate of cover plate detection is greatly reduced, and the detection accuracy is improved.
Drawings
For a clearer description of embodiments of the invention or of solutions in the prior art, the drawings which are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for intelligent optimized cover plate final inspection AOI detection in an embodiment of the invention;
FIG. 2 is a flow chart of a second method for intelligent optimized cover plate final inspection AOI detection in an embodiment of the invention;
FIG. 3 is a flow chart of a third method for intelligent optimized cover plate final inspection AOI detection in an embodiment of the invention;
FIG. 4 is a flow chart of a fourth method for intelligent optimized cover plate final inspection AOI detection in an embodiment of the invention;
FIG. 5 is a schematic structural diagram of an apparatus for intelligent optimized cover plate final inspection AOI detection in an embodiment of the invention;
FIG. 6 is a schematic structural diagram of a second apparatus for intelligent optimized cover plate final inspection AOI detection in an embodiment of the invention;
FIG. 7 is a schematic structural diagram of a third apparatus for intelligent optimized cover plate final inspection AOI detection in an embodiment of the invention;
fig. 8 is a schematic diagram of an apparatus structure according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of an apparatus according to an embodiment of the present invention after a protective cover is hidden.
Fig. 10 is a schematic view of another angle of the device according to the embodiment of the present invention after the protective cover is hidden.
Fig. 11 is a schematic structural view of the device according to the embodiment of the present invention after hiding the protective cover and the base.
FIG. 12 is a schematic diagram of a magnetic force transmission assembly according to an embodiment of the invention.
Fig. 13 is a schematic structural diagram of an area array detection component according to an embodiment of the present invention.
Fig. 14 is a schematic structural diagram of a dark field detection component according to an embodiment of the invention.
Fig. 15 is a schematic structural diagram of a bright-dark field detection assembly according to an embodiment of the present invention.
Fig. 16 is a schematic structural view of a rotating assembly according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
As shown in fig. 1 to 4, fig. 1 is a flow chart of a method for detecting AOI during final inspection of an intelligent optimized cover plate in the present embodiment; FIG. 2 is a flow chart of a second method for detecting AOI of an intelligent optimized cover plate in the embodiment; FIG. 3 is a flow chart of a third method for intelligent optimized cover plate final inspection AOI detection in the embodiment; fig. 4 is a flow chart of a fourth method for intelligently optimizing cover plate final inspection AOI detection in the present embodiment. Specifically, the method for intelligently optimizing the cover plate final inspection AOI detection comprises the following steps:
and 101, presetting a detection strategy corresponding relation of the cover plate according to the cover plate type information comprising the model, the size and the thickness on the cover plate, and presetting the detection strategy corresponding relation into a controller of a cover plate detection work line.
And 102, receiving a cover plate to be detected, acquiring cover plate type information of the cover plate, comparing the cover plate type information with a corresponding relation of the detection strategy to obtain the detection strategy, and obtaining an area array detection strategy, a dark field detection strategy, a rotation strategy and a bright-dark field detection strategy according to the detection strategy.
And 103, placing the cover plate to be detected on the area array detection assembly for detection according to an area array detection strategy.
And 104, placing the cover plate to be detected at the dark field detection assembly to move for detection according to the dark field detection strategy.
And 105, transmitting the rotation direction of the cover plate to be detected after dark field detection to a bright-dark field detection assembly according to a rotation strategy.
Step 106, detecting at the bright-dark field detection component.
In some alternative embodiments, unlike in fig. 1, the method for intelligently optimizing cover plate final inspection AOI detection further includes:
step 201, presetting a corresponding relation between a cover plate type, a rotation strategy and the pulse number of a rotary encoder in a cover plate detection working line.
Step 202, according to cover plate type information and rotation strategy of a cover plate to be detected, obtaining a corresponding rotation encoder to obtain pulse number, monitoring the transmission speed of a magnetic roller through encoder pulse, and matching a line scanning camera; wherein, the matching relation is: encoder pulse count = magnetometric roller circumference/line scan camera minimum pixel precision.
In some alternative embodiments, unlike in fig. 1, the method for intelligently optimizing cover plate final inspection AOI detection further includes:
step 301, recording detection results of an area array detection result, a dark field detection result and a bright-dark field detection result in each cover plate to be detected according to the cover plate type information.
Step 302, dividing the detection result into training detection data and checking detection data corresponding to the cover plate type information according to a preset classification strategy.
Step 303, constructing a cover plate detection training model by using training detection data based on a preset cover plate detection function.
And 304, when the cover plate detection training model is successfully checked by using the check detection data, obtaining a corresponding estimated detection result according to the cover plate detection training model and the cover plate type information of the cover plate to be detected.
Step 305, obtaining a corresponding detection strategy according to the estimated detection result.
In some alternative embodiments, unlike in fig. 1, the method for intelligently optimizing cover plate final inspection AOI detection further includes:
and step 401, detecting whether the edge breakage and angle breakage defect occurs on the arc edge of the cover plate to be detected on the area array detection assembly.
And step 402, performing transverse line scanning detection at the dark field detection assembly, and detecting whether scratches appear in the transverse direction of the cover plate to be detected and whether the scratches appear in the error range.
Step 403, detecting whether the front and the back of the cover plate to be detected are stained according to the bright-dark field detection strategy at the bright-dark field detection assembly, and performing longitudinal line scanning detection to detect whether scratches appear on the cover plate to be detected in the longitudinal direction and whether the scratches appear in the error range.
Fig. 5 to 16 show a schematic structural diagram of an apparatus for intelligent optimized cover plate final inspection AOI inspection in the present embodiment, in fig. 5; FIG. 6 is a schematic structural diagram of a second apparatus for intelligent optimized cover plate final inspection AOI detection in the present embodiment; fig. 7 is a schematic structural diagram of a third apparatus for intelligent optimization of cover plate final inspection AOI detection in the present embodiment; fig. 8 is a schematic view of the apparatus structure in the present embodiment; FIG. 9 is a schematic view of the structure of the device in this embodiment after the protective cover is hidden; FIG. 10 is a schematic view of the device according to another embodiment after concealing the protective cover; FIG. 11 is a schematic view of the structure of the device according to the present embodiment after the protective cover and the base are hidden; FIG. 12 is a schematic diagram of the magnetic force transmission assembly according to the present embodiment; FIG. 13 is a schematic structural diagram of an area array detecting component in the present embodiment; FIG. 14 is a schematic diagram of a dark field detection assembly according to the present embodiment; FIG. 15 is a schematic diagram of a bright-dark field detection assembly according to the present embodiment; fig. 16 is a schematic structural view of the rotating assembly in the present embodiment.
Specifically, this device that intelligence optimization apron final inspection AOI detected includes: the device comprises a detection setting module 501, a detection strategy selection module 502, an area array detection control module 503, a dark field detection control module 504, a rotation transmission control module 505 and a bright and dark field detection control module 506.
The detection setting module 501 presets a detection policy correspondence relationship of the cover plate according to the cover plate type information including the model, the size and the thickness on the cover plate, and presets the detection policy correspondence relationship into a controller of a cover plate detection work line.
The detection strategy selection module 502 is connected with the detection setting module 501, receives the cover plate to be detected, acquires the cover plate type information of the cover plate, compares the cover plate type information with the detection strategy to obtain a detection strategy, and obtains an area array detection strategy, a dark field detection strategy, a rotation strategy and a bright and dark field detection strategy according to the detection strategy.
The area array detection control module 503 is connected with the detection strategy selection module 502, and the cover plate to be detected is placed on the area array detection assembly for detection according to the area array detection strategy.
The dark field detection control module 504 is connected with the detection strategy selection module 502 and the area array detection control module 503, and the cover plate to be detected is placed at the dark field detection assembly to move for detection according to the dark field detection strategy.
The rotation transmission control module 505 is connected with the detection strategy selection module 502 and the dark field detection control module 504, and transmits the rotation direction of the cover plate to be detected after dark field detection to the dark field detection assembly according to the rotation strategy.
The bright-dark field detection control module 506 is connected with the detection strategy selection module 502 and the rotation transmission control module 505, and detects at the bright-dark field detection assembly.
In some alternative embodiments, the apparatus for intelligent optimization of cover plate end inspection AOI inspection further comprises: the rotation control parameter obtaining module 601 is connected with the rotation transmission control module 505, and preset the corresponding relation between the type of the cover plate, the rotation strategy and the pulse number of the rotary encoder in the cover plate detection line.
According to the cover plate type information and the rotation strategy of the cover plate to be detected, a corresponding rotary encoder is obtained to acquire pulse numbers, the transmission speed of the magnetic force roller is monitored through encoder pulses, and the linear scanning camera is matched; wherein, the matching relation is: encoder pulse count = magnetometric roller circumference/line scan camera minimum pixel precision.
In some optional embodiments, in the device for intelligently optimizing the final inspection of the cover plate and the AOI inspection, the inspection tool line includes a feeding component, a transferring component, an area array inspection component, a dark field inspection component, a bright and dark field inspection component, a magnetic force transmission component and a rotating component, and the feeding component, the area array inspection component, the dark field inspection component and the bright and dark field inspection component are sequentially arranged from an input end to an output end.
In some optional embodiments, the apparatus for intelligently optimizing cover plate final inspection AOI detection further includes: the detection strategy training module 701 is connected with the detection strategy selection module 502, and records the detection results of the area array detection result, the dark field detection result and the bright and dark field detection result in each cover plate to be detected according to the cover plate type information.
And dividing the detection result corresponding to the cover plate type information into training detection data and checking detection data according to a preset classification strategy.
And constructing a cover plate detection training model by using the training detection data based on a preset cover plate detection function.
When the cover plate detection training model is successfully checked by using the check detection data, a corresponding estimated detection result is obtained according to the cover plate detection training model and the cover plate type information of the cover plate to be detected; and obtaining a corresponding detection strategy according to the estimated detection result.
In some alternative embodiments, in the apparatus for intelligent optimization of cover plate final inspection AOI inspection, the area array inspection control module 503 is configured to detect whether edge collapse and corner collapse defects occur on the arc edge of the cover plate to be inspected on the area array inspection assembly.
The dark field detection control module 504 is configured to perform a horizontal line scan detection at the dark field detection component, and detect whether a scratch appears in a horizontal direction of the cover plate to be detected, and whether the appearing scratch is within an error range;
the bright-dark field detection control module 506 is configured to detect, at the bright-dark field detection assembly, whether the front and the back of the cover plate to be detected are stained according to a bright-dark field detection policy, and perform a longitudinal line scan detection to detect whether a scratch appears on the cover plate to be detected in the longitudinal direction, and whether the appearing scratch is within an error range.
The invention is discussed in detail below with reference to fig. 8-16 and the specific examples:
the intelligent cover plate final inspection AOI device is arranged in the cover plate final inspection AOI device and used for controlling the inspection work line. The cover plate final inspection AOI device comprises a base 1 and at least one group of detection working lines 2 arranged on the base 1, wherein the detection working lines 2 are preferably arranged as two groups of detection working lines 2, and each group of detection working lines 2 can be arranged on the base 1 side by side, so that the management is convenient. The detection line 2 comprises a feeding component 21, a transferring component 23, an area array detection component 22, a dark field detection component 24, a bright and dark field detection component 25, a magnetic force transmission component 26 and a rotating component 27. The feeding assembly 21, the area array detection assembly 22, the dark field detection assembly 24 and the bright-dark field detection assembly 25 are sequentially arranged from the input end to the output end, according to the position setting, the cover plate is firstly subjected to area array detection of the cover plate after being fed from the feeding assembly 21, the area array detection assembly 22 detects whether the arc edge of the cover plate has edge collapse and corner collapse defects, then dark field detection is carried out, the dark field detection assembly 24 detects whether the visible area of the cover plate has scratch defects in the transverse direction, bright-dark field detection is carried out, whether the front surface and the back surface of the bright-dark field detection cover plate have defects such as stains, bubbles and gaps, and meanwhile, whether the visible area of the cover plate has scratch defects in the vertical direction is also detected. Since the cover plate is stationary during the area array detection, and the cover plate needs to be scanned to detect whether the corresponding defect exists during the dark field detection and the bright-dark field detection, in order to provide the adaptive detection conditions, the magnetic force transmission assembly 26 is fixed on the base 1 and spans the dark field detection assembly 24 and the bright-dark field detection assembly 25, the magnetic force transmission assembly 26 is arranged at the rear side of the area array detection assembly 22 and is used for driving the cover plate to move through the dark field detection assembly 24 and the bright-dark field detection assembly 25, the magnetic force transmission assembly 26 utilizes the attraction and repulsion interaction of the magnet to originally transmit the cover plate, and then the magnetic force transmission assembly 26 is not contacted with the cover plate in the conveying process, so that the cover plate is not worn, and no trace is left on the cover plate. Since the cover plate is fixed during the area array detection, the cover plate is not directly conveyed, but conveyed by being adsorbed by the transfer component 23, the transfer component 23 is arranged beside the feeding component 21, the area array detection component 22 and the dark field detection component 24, the transfer component 23 adsorbs the cover plate of the feeding component 21 to be conveyed to the area array detection component 22 for detection, and the adsorbed cover plate is placed on the magnetic force conveying component 26 for conveying to the subsequent process for detection after the area array detection component 22 is finished. The rotating assembly 27 is arranged beside the dark field detection assembly 24 and the bright and dark field detection assembly 25, the dark field detection assembly 24 detects scratch defects on the transverse direction of the cover plate, and in order to detect comprehensively, the rotating assembly 27 enables the cover plate to rotate to be vertical after the cover plate is detected by the dark field detection assembly 24, and then the cover plate is subjected to scratch defect detection on the vertical direction.
The magnetic force transmission assembly 26 comprises a transmission base 261, a transmission driving device 262, a rotary encoder 263 and a plurality of magnetic force rollers 264, wherein the magnetic force rollers 264 are arranged on the transmission base 261 at intervals, the dark field detection assembly 24 and the bright and dark field detection assembly 25 are positioned in gaps of the magnetic force rollers 264, the influence of the magnetic force transmission assembly 26 on detection vision is avoided, the transmission driving device 262 is in transmission connection with the magnetic force rollers 264 to drive the magnetic force rollers 264 to operate, the rotary encoder 263 is arranged on the transmission base 261 and is electrically connected with the magnetic force rollers 264, the rotary encoder 263 acquires the pulse number of the magnetic force rollers 264, the transmission speed of the magnetic force rollers 264 is monitored through encoder pulses, and parameters of line scanning cameras in the dark field detection assembly 24 and the bright and dark field detection assembly 25 are matched, so that the transmission speed is matched with the line scanning cameras, and the fact that the transmission speed of the magnetic force transmission assembly 26 is too fast and the line scanning cameras are not detected completely is avoided.
According to the cover plate final inspection AOI device provided in the embodiment, as shown in fig. 6, the area array detection assembly 22 comprises an area array camera 221, an area array detection seat 222 and an area array moving part 223, wherein the area array camera 221 and the area array detection seat 222 can be arranged inside the base 1 and can play a role in protection, the area array camera 221 is clamped on the area array moving part 223, the area array moving part 223 is formed by combining a plurality of sliding blocks and sliding rails, and the area array moving part 223 can be driven by an air cylinder or a motor to drive the area array camera 221 to move in the x direction, the y direction and the z direction so as to adapt to different cover plate detection positions. The area array detection seat 222 comprises an area array detection bottom plate 2221, an area array detection panel 2223 and an area array detection plate supporting block 2222, an area array detection through hole is formed in the middle of the area array detection bottom plate 2221, the area array camera 221 detects a cover plate placed on the area array detection panel 2223 through the area array detection through hole, the area array detection plate supporting block 2222 is arranged on the area array detection bottom plate 2221 and frames the area array detection panel 2223, the area array detection panel 2223 is located above the area array camera 221 to be matched with an optical path of the area array camera 221, an area array luminous strip is arranged on the side edge of the area array detection panel 2223, and the area array luminous strip illuminates the detected cover plate to provide detection brightness.
In the cover plate final inspection AOI device provided in this embodiment, the dark field detection assembly 24 detects the transverse direction of the visible area of the cover plate. The dark field detection assembly 24 includes a dark field line scanning camera 241, a dark field moving member 242 and two dark field light source members 243 which are symmetrical to each other, the dark field line scanning camera 241 is clamped on the dark field moving member 242, and the dark field line scanning camera 241 is located above the space between the two dark field light source members 243, and the dark field line scanning camera 241 can move along with the dark field moving member 242 in x direction, y direction and z direction, wherein the dark field moving member 242 is formed by combining a slide block and a slide rail, in order to realize accurate fine adjustment, a screw 244 can be arranged in the z direction, and the slide block can be driven to move on the slide rail by applying force to the screw. The dark field light source 243 comprises a dark field light source seat 2431 and a dark field light emitting strip 2432, and the dark field light emitting strip 2432 is rotatably connected to the dark field light source seat 2431, so that the dark field light emitting strip 2432 can be rotated to supply detection brightness of cover plates with different angles.
In the cover plate final inspection AOI device provided in this embodiment, the bright-dark field detection assembly 25 includes a bright-dark field light source 251, a first bright-dark field line scan camera 252, a second bright-dark field line scan camera 253, a third bright-dark field line scan camera 254, a first bright-dark field moving member 255, a second bright-dark field moving member 256 and a third bright-dark field moving member 257, the first bright-dark field line scan camera 252 is clamped on the first bright-dark field moving member 255 and is located above the bright-dark field light source 251 for detecting defects on the front surface of the cover plate, the second bright-dark field line scan camera 253 is clamped on the second bright-dark field moving member 256 and is located below the bright-dark field light source 251 for detecting defects on the back surface of the cover plate, and the third bright-dark field line scan camera 254 is clamped on the third bright-dark field moving member 257 and is obliquely arranged beside the second bright-dark field line scan camera 253 for detecting defects in the lateral direction of the visible area of the cover plate.
In order to achieve the purpose of bright-dark field detection, an adaptive bright-dark field light source piece 251 is arranged, the bright-dark field light source piece 251 is cuboid, a plurality of luminous bodies are arranged in the bright-dark field light source piece 251, an arc-shaped concave surface 2511 is arranged at the top of the bright-dark field light source piece 251, the arc-shaped concave surface 2511 is a perspective surface, a magnetic force transmission assembly 26 is arranged above the bright-dark field light source piece 251, and a cover plate is transmitted to the arc-shaped concave surface 2511 for line scanning detection. The first bright and dark field line scan camera 252 is located on the front surface of the detection cover plate above the arc concave surface 2511, the second bright and dark field line scan camera 253 is located on the back surface of the detection cover plate below the arc concave surface 2511, and the third bright and dark field line scan camera 254 is located on the side lower surface of the arc concave surface 2511 to detect the visible region of the cover plate. The third bright-dark field line scanning camera 254 moves along a trajectory similar to the curved concave surface 2511 during detection. In order to ensure smooth line scanning detection, the third bright-dark field moving member 257 includes an angle adjusting member 258, the angle adjusting member 258 is provided with an arc chute, and the third bright-dark field line scanning camera 254 is slidably connected with the arc chute of the angle adjusting member 258 through an angle adjusting slider.
The rotating assembly 27 includes a rotating base 273, an absorbing member 272, a rotating driving device 274 and a shifting member 271, the shifting member 271 is fixed on the rotating base 273, the rotating driving device 274 is fixed on the shifting member 271, the absorbing member 272 is electrically connected with an output end of the rotating driving device 274, the absorbing member 272 can be vacuum absorption or electromagnetic absorption, the rotating driving device 274 can be motor driven, and the absorbing member 272 rotates after absorbing the cover plate, so that the cover plate horizontally arranged is converted into a vertical flat plate. Similarly, the displacement member 271 is also formed by combining a plurality of sliding blocks and sliding rails, and can move in the x direction, the y direction and the z direction by supplying power to the motor or the air cylinder.
The utility model provides a cover plate final inspection AOI equipment in this embodiment, as shown in FIG. 1, still includes protection casing 3, and protection casing 3 is fixed on base 1 and parcel detects worker line 2, plays the effect of protection, and the top of protection casing 3 is provided with air cleaner 4, can effectively avoid the air to smuggle pollutant entering such as dust secretly, prevents to cause adverse effect to the detection of cover plate.
In addition, because the line scan camera needs to keep synchronous with the transmission of the detected product to avoid the problems of accurate detection, according to experiments, if the product is transmitted too fast, the cover plate can not be completely detected, but if the product is too slow, the product image is stretched, and the detection is inaccurate. Therefore, the invention also provides a cover plate appearance detection method, which is based on the cover plate final inspection AOI equipment, and synchronizes a line scanning camera and a detected product through line trigger input of an encoder, and specifically comprises the following steps:
the cover plate to be detected is placed on the feeding component 21 for transmission, and the area array component needs to be fixed, so that the cover plate is not directly conveyed by the conveyor belt, but is grabbed by the transfer component 23. The transfer component 23 adsorbs the cover plate to be detected and places the cover plate on the area array detection component 22, detects whether the edge and corner breakage defect occurs on the arc edge of the cover plate, and if the arc edge of the cover plate shines, the defects such as edge breakage and corner breakage occur.
The cover plate is moved at the dark field detection assembly 24, and a transverse line scan is performed to detect whether a scratch is present in the transverse direction of the cover plate and whether the scratch is within an error range.
Because the scratches with different directivities are only taken into account when photographing in one movement direction, and are easy to cause missed detection, the bright-dark field detection assembly 25 is further arranged to increase line scanning detection in the other direction for the cover plate. The cover plate is turned into a vertical flat plate in the rotation direction of the cover plate, and then is moved at the position of the bright-dark field detection assembly 25 to detect whether the front and back surfaces of the cover plate are stained, and longitudinal line scanning detection is performed to detect whether scratches appear in the longitudinal direction of the cover plate and whether the scratches appear in the longitudinal direction of the cover plate are within an error range.
Meanwhile, a rotary encoder 263 is provided to acquire the number of pulses, monitor the driving speed of the magnet roller 264 by the encoder pulses, and match the line scan camera. Wherein, the matching relation is: encoder pulse number = magnetic roller 264 perimeter/line scan camera minimum pixel precision, and the parameters calculated from the matching relationship are adjusted so that the line scan camera and the detected product are synchronized.
The invention has been further described with reference to specific embodiments, but it should be understood that the detailed description is not to be construed as limiting the spirit and scope of the invention, but rather as providing those skilled in the art with the benefit of this disclosure with the benefit of their various modifications to the described embodiments.
Claims (8)
1. The method for intelligently optimizing cover plate final inspection AOI detection is characterized by comprising the following steps of:
presetting a detection strategy corresponding relation of the cover plate according to cover plate type information comprising model, size and thickness, and presetting the detection strategy corresponding relation into a controller of a cover plate detection work line;
receiving a cover plate to be detected, acquiring cover plate type information of the cover plate, comparing the cover plate type information with the detection strategy to obtain a detection strategy, and obtaining an area array detection strategy, a dark field detection strategy, a rotation strategy and a bright-dark field detection strategy according to the detection strategy;
placing the cover plate to be detected on an area array detection assembly according to the area array detection strategy for detection;
according to the dark field detection strategy, the cover plate to be detected is placed at a dark field detection assembly to move for detection;
transmitting the rotation direction of the cover plate to be detected after dark field detection to a bright-dark field detection assembly according to the rotation strategy;
detecting at the bright-dark field detection assembly;
recording detection results of an area array detection result, a dark field detection result and a bright and dark field detection result in each cover plate to be detected according to the cover plate type information;
dividing the detection result into training detection data and checking detection data corresponding to the cover plate type information according to a preset classification strategy;
constructing a cover plate detection training model by utilizing the training detection data based on a preset cover plate detection function;
when the cover plate detection training model is successfully verified by the verification detection data, a corresponding estimated detection result is obtained according to the cover plate detection training model and the cover plate type information of the cover plate to be detected;
and acquiring the corresponding detection strategy according to the estimated detection result.
2. The method for intelligent optimization of cover plate final inspection AOI detection of claim 1, further comprising:
presetting a corresponding relation between a cover plate type, a rotation strategy and the pulse number of a rotary encoder in the cover plate detection working line;
according to the cover plate type information of the cover plate to be detected and the rotation strategy, obtaining the corresponding pulse number of the rotary encoder, monitoring the transmission speed of the magnetic force roller through the encoder pulse, and matching the linear scanning camera; wherein, the matching relation is: encoder pulse count = magnetometric roller circumference/line scan camera minimum pixel precision.
3. The method for intelligently optimizing cover plate final inspection AOI detection according to claim 1, wherein the detection tool line comprises a feeding assembly, a transferring assembly, an area array detection assembly, a dark field detection assembly, a bright and dark field detection assembly, a magnetic force transmission assembly and a rotating assembly, and the feeding assembly, the area array detection assembly, the dark field detection assembly and the bright and dark field detection assembly are sequentially arranged from an input end to an output end.
4. The method for intelligent optimization of cover plate final inspection AOI detection of claim 1, further comprising:
detecting whether the edge breakage and angle breakage defect occurs on the arc edge of the cover plate to be detected on the area array detection assembly;
performing transverse line scanning detection at the dark field detection assembly, and detecting whether scratches appear in the transverse direction of the cover plate to be detected and whether the scratches appear in an error range;
and detecting whether the front surface and the back surface of the cover plate to be detected are stained or not according to the bright-dark field detection strategy at the bright-dark field detection assembly, and detecting whether scratches appear in the longitudinal direction of the cover plate to be detected and whether the scratches appear in the error range or not by performing longitudinal line scanning detection.
5. Device that apron final inspection AOI detected is optimized to intelligence, a serial communication port, include: the device comprises a detection setting module, a detection strategy selection module, an area array detection control module, a dark field detection control module, a rotary transmission control module and a bright and dark field detection control module; wherein the method comprises the steps of
The detection setting module presets a detection strategy corresponding relation of the cover plate according to the type information of the cover plate comprising the type, the size and the thickness of the cover plate, and presets the detection strategy corresponding relation into a controller of a cover plate detection working line;
the detection strategy selection module is connected with the detection setting module, receives a to-be-detected cover plate, acquires cover plate type information of the to-be-detected cover plate, compares the to-be-detected cover plate type information with the detection strategy correspondence to obtain a detection strategy, and obtains an area array detection strategy, a dark field detection strategy, a rotation strategy and a bright and dark field detection strategy according to the detection strategy;
the area array detection control module is connected with the detection strategy selection module, and the cover plate to be detected is placed on an area array detection assembly for detection according to the area array detection strategy;
the dark field detection control module is connected with the detection strategy selection module and the area array detection control module, and the cover plate to be detected is placed at the dark field detection assembly to move for detection according to the dark field detection strategy;
the rotation transmission control module is connected with the detection strategy selection module and the dark field detection control module, and transmits the rotation direction of the cover plate to be detected after dark field detection to a bright-dark field detection assembly according to the rotation strategy;
the bright-dark field detection control module is connected with the detection strategy selection module and the rotary transmission control module and is used for detecting at the bright-dark field detection assembly;
further comprises: the detection strategy training module is connected with the detection strategy selection module, and records detection results of an area array detection result, a dark field detection result and a bright and dark field detection result in each cover plate to be detected according to the cover plate type information;
dividing the detection result into training detection data and checking detection data corresponding to the cover plate type information according to a preset classification strategy;
constructing a cover plate detection training model by utilizing the training detection data based on a preset cover plate detection function;
when the cover plate detection training model is successfully verified by the verification detection data, a corresponding estimated detection result is obtained according to the cover plate detection training model and the cover plate type information of the cover plate to be detected;
and acquiring the corresponding detection strategy according to the estimated detection result.
6. The intelligent, optimized, cover-plate end-of-inspection, AOI-detection device of claim 5, further comprising: the rotation control parameter acquisition module is connected with the rotation transmission control module, and preset the corresponding relation between the type of the cover plate, the rotation strategy and the pulse number of the rotary encoder in the cover plate detection line;
according to the cover plate type information of the cover plate to be detected and the rotation strategy, obtaining the corresponding pulse number of the rotary encoder, monitoring the transmission speed of the magnetic force roller through the encoder pulse, and matching the linear scanning camera; wherein, the matching relation is: encoder pulse count = magnetometric roller circumference/line scan camera minimum pixel precision.
7. The device for intelligently optimizing cover plate final inspection AOI detection according to claim 5, wherein the detection tool line comprises a feeding assembly, a transferring assembly, an area array detection assembly, a dark field detection assembly, a bright and dark field detection assembly, a magnetic force transmission assembly and a rotating assembly, and the feeding assembly, the area array detection assembly, the dark field detection assembly and the bright and dark field detection assembly are sequentially arranged from an input end to an output end.
8. The device for intelligently optimizing cover plate final inspection AOI detection according to claim 5, wherein the area array detection control module is used for detecting whether edge collapse and angle collapse defects occur on the arc edge of the cover plate to be detected on the area array detection assembly;
the dark field detection control module is used for conducting transverse line scanning detection at the dark field detection assembly and detecting whether scratches appear in the transverse direction of the cover plate to be detected or not and whether the scratches appear in the error range or not;
the bright-dark field detection control module is used for detecting whether the front and the back of the cover plate to be detected are stained or not at the bright-dark field detection assembly according to the bright-dark field detection strategy, and detecting whether scratches appear in the longitudinal direction of the cover plate to be detected and whether the scratches appear in the longitudinal direction of the cover plate to be detected are within an error range or not by longitudinal line scanning detection.
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| CN114460081A (en) * | 2022-02-09 | 2022-05-10 | 深圳宇视嘉网络科技有限公司 | Image acquisition motion control method for line scanning camera |
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