CN105466946B - Online detection system and method based on machine vision - Google Patents
Online detection system and method based on machine vision Download PDFInfo
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- CN105466946B CN105466946B CN201410421861.7A CN201410421861A CN105466946B CN 105466946 B CN105466946 B CN 105466946B CN 201410421861 A CN201410421861 A CN 201410421861A CN 105466946 B CN105466946 B CN 105466946B
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Abstract
The invention is suitable for the technical field of display device detection, and discloses an online detection system and a detection method based on machine vision. The machine vision-based online detection system comprises a machine body with a darkroom, wherein the machine body is arranged on a transmission line in a crossing manner, and the transmission line is used for transmitting a display device and used for loading a protection tool of the display device; an imaging device is arranged in the darkroom, a turnover part for turning over the display device or the display device and protecting the tool to enable the display device to face the imaging device is arranged in the darkroom, the display device is connected with a junction box, and a butt joint used for butt joint with the junction box is arranged in the darkroom. The online detection method based on machine vision adopts the online detection system based on machine vision. The machine vision-based online detection system and the machine vision-based online detection method can realize continuous production and detection without taking down the display device from a production line, and are high in detection efficiency, good in detection effect and high in detection automation degree.
Description
Technical Field
The invention belongs to the technical field of display device detection, and particularly relates to an online detection system and method based on machine vision.
Background
In recent years, since LCD (Liquid Crystal Display) has excellent light and thin characteristics, it has been widely used as a control panel in most of the fields of communication products (e.g., car navigation system, mobile phone), consumer electronic products (e.g., LCD televisions, video cameras), instrument products, industrial automation products, etc., and the market has been expanding. Because the whole production process flow of the LCD is long, the size of the substrate is larger and larger, and the line size is more and more precise, the quality control is more strictly needed in the production process of the LCD. However, in the LCD inspection process, a manual inspection method is still used for the most part. Thus, due to subjective differences of people, a lot of uncontrollable factors are likely to be brought to quality detection. The machine imaging detection system (machine vision detection system) can replace manual operation by objective data, so that various defects caused by manual detection can be eliminated, the detection quality and efficiency can be improved, and the consistency and standardization degree of the product surface quality can be improved. In an automated production site of a display device, such as a liquid crystal display, due to the limitation of front-end processes of a production line, detection of a liquid crystal display module must be performed by manually plugging in a display signal and turning over the liquid crystal module 105 °. In recent years, with the upscaling, upsizing and internationalization of liquid crystal display screens, the requirements on detection are higher and higher, the metering mode is changed from spot inspection to 100% full inspection, the detection items are complicated from simple, and the requirements on high labor intensity and complex precision cannot be met by manual detection.
However, in the detection system based on machine vision in the prior art, the display device is generally required to be removed from the production line and then separately detected, so that the degree of automation is low and the detection efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an online detection system and a detection method based on machine vision, which have the advantages of high detection efficiency, good effect and high detection automation degree.
The technical scheme of the invention is as follows: the machine vision-based online detection system comprises a machine body with a darkroom, wherein the machine body is arranged on a transmission line in a crossing manner, and the transmission line is used for transmitting a display device and a protection tool for loading the display device; one side of the machine body is provided with a feeding hole for a display device to enter the darkroom, the other side of the machine body is provided with a discharging hole for the display device to be discharged from the darkroom, the conveying line penetrates through the feeding hole and the discharging hole, an imaging device is arranged in the darkroom, the darkroom is internally provided with a turnover part for turning over the display device or the display device and a protection tool to enable the display device to face the imaging device, the display device is connected with a junction box, and a butt joint head for butt joint with the junction box is arranged in the darkroom.
Optionally, the turning component includes an upper mechanical arm for turning over the display device and a lower mechanical arm for turning over the protection tool.
Optionally, the turning component comprises a lifting component for lifting the display device from the protective tool from bottom to top and a mechanical arm for turning the display device, and the protective tool is provided with a position avoiding through hole for the lifting component to pass through.
Optionally, four corners of protection frock are provided with keeps away a breach groove, upset part is including from the breach groove department of protection frock will display device presss from both sides the tight and upset clamping part of tight and upset.
Optionally, the turnover part comprises a turnover plate, and a vacuum adsorption disc capable of being adsorbed on the back of the display device is connected to the turnover plate.
Optionally, a correcting component for correcting the display device or the display device and protecting the position of the tool is arranged in the darkroom.
The invention also provides an online detection method based on machine vision, which adopts the online detection system based on machine vision and comprises the following steps:
the protection tool is positioned on a transmission line, a display device is positioned on the protection tool, the screen of the display device faces the protection tool,
Connecting a display device on the protective tool to the junction box through a cable on the transmission line;
the protection tool and the display device are sent into the darkroom of the machine body in groups through a transmission line;
tilting the display device to an angle towards the imaging device by a tilting member;
the butt joint is in butt joint with the junction box through a turnover part or a manipulator;
illuminating the display device through the butt joint and the junction box;
the imaging device captures an image and performs recognition analysis.
Optionally, the process of tilting the display device to an angle towards the imaging device by the tilting component includes the following steps:
the display device and the protection tool are simultaneously turned over to an angle facing the imaging device through the upper mechanical arm and the lower mechanical arm, and then the protection tool is turned over to the conveying line through the lower mechanical arm;
after the imaging device captures an image, the lower mechanical arm overturns the protection tool to be attached to the display device, and the display device and the protection tool are overturned to the conveying line through the upper mechanical arm and the lower mechanical arm.
Optionally, the process of tilting the display device to an angle towards the imaging device by the tilting component includes the following steps:
The lifting part passes through the protection tool and jacks one side of the display device to enable the display device to turn over a set angle, and the display device jacked by the lifting part is continuously turned over to an angle facing the imaging device through the mechanical arm;
after the imaging device captures an image, the mechanical arm turns over the display device and the lifting part is retracted so that the display device is born on the protection tool again.
Optionally, notch grooves are preset at four corners of the protection tool, and the process of turning the display device to an angle facing the imaging device by the turning component includes the following steps:
clamping parts of the overturning parts clamp and overturn the display device to an angle facing the imaging device from notch grooves at four corners of the protection tool;
after the imaging device captures an image, the clamping part of the overturning part overturns the display device and enables the display device to be born on the protection tool again.
Optionally, the process of tilting the display device to an angle towards the imaging device by the tilting component includes the following steps:
the vacuum adsorption disc of the turnover part is adsorbed on the back surface of the display device, and then the display device is turned to an angle facing the imaging device;
After the imaging device captures an image, the overturning component overturns the display device, and enables the display device to be born on the protection tool again, and then the vacuum adsorption disc loosens the display device.
Optionally, during the overturning process, when the overturning component fixes the display device, the butt joint in the overturning component is in butt joint with the junction box on the protection tool; when the overturning part loosens the display device, the butt joint in the overturning part is separated from the junction box on the protection tool.
According to the machine vision-based online detection system and the machine vision-based online detection method, the machine body with the darkroom and the conveying line for conveying the display device into the darkroom are arranged, the display device is turned to a set angle through the turning component, and the imaging device can detect the display device, so that continuous production and detection can be realized, the display device does not need to be taken down from the production line, the detection efficiency is high, the detection effect is good, and the detection automation degree is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a machine vision-based on-line inspection system according to an embodiment of the present invention;
FIG. 2 is a schematic plan view of an online machine vision-based inspection system according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a conveyor line in a machine vision-based on-line inspection system according to an embodiment of the present invention;
FIG. 4 is a schematic perspective view of a conveyor line in a machine vision-based on-line inspection system according to an embodiment of the present invention;
FIG. 5 is a schematic perspective view of a conveyor line in a machine vision-based on-line inspection system according to an embodiment of the present invention;
fig. 6 is a schematic perspective view of a display device connected to a junction box in the machine vision-based on-line detection system according to an embodiment of the present invention;
FIG. 7 is a schematic perspective view of an interface connector connected to a flipping panel in an online inspection system based on machine vision according to an embodiment of the present invention;
FIG. 8 is a schematic perspective view of an abutment in a machine vision based on-line inspection system according to an embodiment of the present invention;
FIG. 9 is a schematic perspective view of a junction box in a machine vision-based on-line inspection system according to an embodiment of the present invention;
FIG. 10 is a schematic perspective view of a splice and junction box in an online machine vision-based inspection system in accordance with an embodiment of the present invention;
FIG. 11 is a schematic perspective view of a first implementation of a flip component in a machine vision based on-line inspection system provided by an embodiment of the present invention;
FIG. 12 is a schematic perspective view of a first implementation of a flip component in a machine vision based on-line inspection system provided by an embodiment of the present invention;
FIG. 13 is a schematic perspective view of a second implementation of a flip component in a machine vision based on-line inspection system provided by an embodiment of the present invention;
FIG. 14 is a schematic perspective view of a second implementation of a flip component in a machine vision based on-line inspection system provided by an embodiment of the present invention;
FIG. 15 is a schematic perspective view of a third implementation of a flip component in a machine vision based on-line inspection system provided by an embodiment of the present invention;
FIG. 16 is a schematic perspective view of a fourth implementation of a flip component in a machine vision based on-line inspection system provided by an embodiment of the present invention;
FIG. 17 is a schematic perspective view of a fourth implementation of a flip component in a machine vision based on-line inspection system provided by an embodiment of the present invention;
FIG. 18 is a schematic plan view of a display device detection system according to an embodiment of the present invention;
Fig. 19 is a schematic partial cross-sectional view of a display device inspection system according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that, in this embodiment, terms of left, right, up, down, etc. are merely relative concepts or references to normal use states of the product, and should not be construed as limiting.
As shown in fig. 1 to 10, the machine vision-based online detection system provided by the embodiment of the invention comprises a conveying line 10 and a machine body 11 with a darkroom, wherein the machine body 11 is straddled on the conveying line 10, and the conveying line 10 can be butted between production lines of a display device. The conveying line 10 may be used for conveying the display device 91 and a protecting tool 92 for loading the display device 91, the protecting tool 92 may be a foam cushion or a foam cushion, etc., which is used for protecting a screen of the display device 91 on the conveying line 10, in a conventional production line, the screen of the display device 91 is downward carried on the protecting tool 92, and the protecting tool 92 is placed on the conveying line 10 and driven by the conveying line 10. The conveyor line 10 may have two layers, an upper layer for conveying the display device 91 and the protection tooling 92 and a lower layer for reflowing the protection tooling 92. The conveyor line 10 may be composed of a plurality of driving rollers 101 arranged at intervals. One side of the machine body 11 is provided with a feeding hole 111 for the display device 91 to enter the darkroom, the other side of the machine body 11 is provided with a discharging hole (not shown in the figure) for the display device 91 to be discharged from the darkroom, the conveying line 10 is arranged through the feeding hole 111 and the discharging hole in a penetrating manner and is in butt joint with a production line of the display device, the conveying line 10 can convey the display device 91 into the darkroom of the machine body 11 from one side of the machine body 11, after detection is completed, the conveying line 10 conveys the display device 91 out of the darkroom of the machine body 11 from the other side of the machine body 11, and continuous production and detection can be realized without taking the display device 91 off the production line. The camera is internally provided with an imaging device 12, the imaging device 12 can be an industrial camera and the like, and can be connected with a computer, and the imaging device can acquire images of a display device to be detected through the industrial camera and carry out digital processing analysis through image processing software to realize detection. In particular applications, imaging device 12 may employ a full-frame industrial camera to capture images without the need for motion scanning of imaging device 12 to capture images, thereby improving detection efficiency. The camera is internally provided with a turnover part 2 for turning over the display device 91 or the display device 91 and a protection tool 92 so that the display device 91 faces the imaging device 12, the display device 91 is connected with a junction box 31, and the camera is internally provided with a butt joint 32 for butt joint with the junction box 31. The docking head 32 can be connected to a computer located at the lower part of the darkroom of the main body, and the power supply and digital signals of the display device 91 can be turned on through the docking head 32 and the junction box 31. Thus, when the display device 91 and the protection tool 92 are put into the darkroom in a group, the turning component 2 turns the display device 91 by a set angle, for example 105 degrees, to turn the display device 91 toward the imaging device 12. During the flipping process, the docking head 32 may be docked with the junction box 31 by a robotic arm or other means to provide power, display signals to the display device 91 for detection. After the detection is finished, the display device 91 is overturned to the conveying line 10 through the overturning part 2, the conveying line 10 is used for conveying the protection tool 92 and the display device 91 to the next station in a group, and the detection system can be integrated with an automatic production line, so that the automation degree is high, and the detection efficiency is high.
Specifically, as shown in fig. 1 to 10, a correction component for correcting the display device 91 or the positions of the display device 91 and the protection tool 92 is disposed in the darkroom, and before the overturning component 2 performs the overturning action, the correction component may first adjust the display device 91 to a uniformly set position, and the correction component includes a push plate 41 disposed on one side of the conveying line 10 and a correction driving member 42 for driving the push plate 41, so as to adjust the display device 91 to a uniform position, so that the overturning component 2 can overturn the display device 91 conveniently. The transfer line 10 in the darkroom may be provided with a sensing switch 43 at one side thereof, and when the display device 91 enters the darkroom, the transfer line 10 may be suspended by the sensing switch 43 so as to perform corresponding correction, overturning and detection actions by the correction means, the overturning means 2 and the imaging device 12. After the display device 91 is turned over to the protection tool 92 by the component 2 to be turned over, the conveying line 10 continues to operate so as to convey the display device 91 with detection to the next station.
Specifically, as shown in fig. 6 to 10, the junction box 31 is connected to the display device 91 through the cable 33, and the protection tool 92 has a receiving groove 921 for receiving the junction box 31, so that the docking head 32 is accurately docked with the junction box 31. The abutment 32 is fixedly connected to the flip member 2.
Specifically, as shown in fig. 6 to 10, power and display signals required for the detection process can be supplied to the device to be detected through the docking head 32 and the junction box 31. The junction box 31 and the butt joint 32 are mated to form an electrical connection. The junction box 31 comprises a box body 311, wherein the box body 311 is provided with a plurality of box body conductive parts 312, and the box body 311 is also provided with a positioning hole 313; the butt joint 32 includes a body 321, the body 321 has a plurality of joint conductive parts 322 which are butted with the box body conductive parts 312, the body 321 has a positioning post 323 which can extend into the positioning hole 313, and the box body 311 or the body 321 is provided with a push rod part for separating the junction box 31 from the butt joint 32. In specific application, as the positioning column 323 and the positioning hole 313 are arranged, the junction box 31 and the butt joint 32 can be butted in the darkroom through equipment such as a mechanical arm component and the like, at the moment, the junction box 31 is moved out of the accommodating groove 921 and is connected with the butt joint 32 on the overturning component 2, the positioning column 323 can be inserted into the positioning hole 313, the joint conductive part 322 can be accurately aligned with the box body conductive part 312, and after the detection step is finished, the junction box 31 and the butt joint 32 can be automatically separated through the push rod component and the junction box 31 can be placed in the accommodating groove 921 again, so that automatic continuous detection is facilitated, the detection automation degree is high, and the detection efficiency is high. Specifically, as shown in fig. 6 to 10, the conductive portion 312 of the case may be a plurality of conductive contacts arranged in a matrix or a linear manner, and the conductive portion 322 of the connector may be a plurality of conductive columns arranged in a matrix or a linear manner, and the conductive columns may correspond to the conductive contacts.
Specifically, the conductive column is an elastic conductive column which can be better contacted with the conductive contact, and the electric connection effect is good.
Specifically, as shown in fig. 6 to 10, the positioning holes 313 are at least two and diagonally arranged, and the positioning posts 323 are at least two and diagonally arranged, so that the structure is simple and compact.
Specifically, as shown in fig. 6 to 10, the front end of the positioning post 323 is tapered, which facilitates aligning the front end of the positioning post 323 with the positioning hole 313. The front end of the positioning post 323 may be rounded.
Specifically, as shown in fig. 18 and 19, a positioning structure is disposed between the positioning hole 313 and the positioning post 323, and the positioning structure includes a positioning groove 3231 formed on a side surface of the positioning post 323, a positioning bead 331 formed on a side wall of the positioning hole 313, and a spring 332 for pushing the positioning bead 331 into the positioning groove 3231, where the positioning groove 3231 may be annular. Thus, when the positioning column 323 is inserted into the positioning hole 313, the positioning bead 331 is kept locked in the positioning groove 3231 under the action of the spring 332, so as to prevent the abutment 32 from sliding out at will, and the structural reliability is good.
Specifically, the push rod members are provided at the end faces of the butt joint 32 opposite to the junction box 31, and the push rod members are provided with at least two.
In particular, as shown in fig. 6 to 10, the push rod part includes a rod body 324 that can be extended or retracted into the abutment 32, and a driving member provided in the abutment 32 for driving the rod body 324. The front end of the rod 324 may be provided with a buffer, which may be a rubber pad or the like.
In particular, the driving member may be a cylinder.
Specifically, as shown in fig. 6 to 10, the box body 311 is provided with a data connection port and a power connection port, the data connection port and the power connection port are provided with connection terminals, the connection terminals are electrically connected to the box body conductive part 312 through wires, in this way, to-be-detected equipment such as the display device 91 and the like can be connected to the data connection port and the power connection port through the universal cable 33 before the detection station, the docking head 32 and the junction box 31 can be docked through the manipulator at the detection station, and the docking of the power line and the data line can be realized through one docking. In a specific application, a magnet or electromagnet may be disposed between the abutment 32 and the junction box 31, so that a certain attractive force is formed between the abutment 32 and the junction box 31 to facilitate alignment connection. When the abutment 32 needs to be disconnected from the junction box 31, the driving member can drive the rod 324 to extend, so as to separate the abutment 32 from the junction box 31, and the detection equipment such as the display device 91 after detection can automatically flow out of the detection station.
Specifically, the data connection port may be an HDMI connection port, or/and a VGA connection port, or/and a DVI connection port, etc., and the type and number of the interfaces may be set according to actual situations.
As shown in fig. 1 to 12, as a first embodiment of the turning member 2, the turning member 2 includes an upper mechanical arm 21a for turning over the display device 91 and a lower mechanical arm 22a for turning over the protection tool 92. The display device 91 and the protection tool 92 are simultaneously turned over to an angle facing the imaging device 12 through the upper mechanical arm 21a and the lower mechanical arm 22a, and then the protection tool 92 is turned over to the conveying line 10 through the lower mechanical arm 22 a; after the imaging device 12 captures an image, the lower mechanical arm 22a turns over the protection tool 92 to be attached to the display device 91, and then the display device 91 and the protection tool 92 are turned over to the conveying line 10 through the upper mechanical arm 21a and the lower mechanical arm 22a. The lower mechanical arm 22a can pass through the gap of the driving roller 101 of the conveying line 10 so as to support and turn over the protection tool 92 from below. The turnover part 2 comprises a base 29 arranged on one side of the conveying line 10, a turnover plate 28 rotatably connected to the base 29, and a turnover driving member for driving the turnover plate 28 to turn over, wherein the turnover driving member can be a motor, an air cylinder and the like. The abutment 32 and the upper robot arm 21a may be provided on the roll-over plate 28. The upper robot arm 21a may be a pneumatic gripper, a robot arm, or the like. In particular applications. After the protection tool 92 carries the display device 91 and the junction box 32 and enters the machine body through the conveying line 10, the upper mechanical arm 21a and the lower mechanical arm 22a simultaneously clamp and fix the protection tool 92 and the display device 91, turn over 105 degrees together, and then the lower mechanical arm 22a turns over the protection tool 92 to-105 degrees on the conveying line 10, so that the display device 91 is exposed to be detected. After the detection is finished, the protection tool 92 is turned over by 105 degrees again until the protection tool is attached to the display device 91, the upper mechanical arm 21a and the lower mechanical arm 22a clamp the display device 91, and the protection tool 92 is turned over by-105 degrees again and returns to the conveying line 10.
As a second embodiment of the turning member 2, as shown in fig. 1 to 10, 13 and 14, the turning member 2 includes a lifting member 21b for lifting the display device 91 from the protection tool 92 from bottom to top and a mechanical arm 22b for turning over the display device 91, and the protection tool 92 has a avoidance through hole 922 for passing through the lifting member 21 b. The lifting part 21b passes through the gap of the driving roller 101 in the conveying line 10 and the avoidance through hole 922 of the protection tool 92, and pushes up one side of the display device 91 to enable the display device 91 to turn over a set angle, and then the display device 91 pushed up by the lifting part 21b is continuously turned over to an angle towards the imaging device 12, for example, 105 degrees through the mechanical arm 22 b; the lifting member 21b may include a jack and a cylinder for driving the jack to lift. After the imaging device 12 captures an image, the mechanical arm 22b turns over the display device 91 and the lifting part 21b is retracted, so that the display device 91 is carried on the protection tool 92 again. The turnover part 2 comprises a base 29 arranged on one side of the conveying line 10, a turnover plate 28 rotatably connected to the base 29, and a turnover driving member for driving the turnover plate 28 to turn over, wherein the turnover driving member can be a motor, an air cylinder and the like. The abutment 32 and the robotic arm 22b may be provided on the flipping panel 28. The robot arm 22b may be a pneumatic gripper or the like.
As a third embodiment of the turning component 2, as shown in fig. 1 to 10 and 15, notch grooves 923 are provided at four corners of the protection tool 92, and the turning component 2 includes a clamping component 21c that clamps and turns the display device 91 from the notch grooves 923 of the protection tool 92. The clamping part 21c of the turning part 2 can clamp and turn the display device 91 to an angle facing the imaging device 12 from the notch grooves 923 at the four corners of the protection tool 92; after the imaging device 12 captures an image, the clamping part 21c of the turning part 2 turns over the display device 91 and makes the display device 91 be carried on the protection tool 92 again. The turnover part 2 comprises a base 29 arranged on one side of the conveying line 10, a turnover plate 28 rotatably connected to the base 29, and a turnover driving member for driving the turnover plate 28 to turn over, wherein the turnover driving member can be a motor, an air cylinder and the like. The abutment 32 and the clamping member 21c may be provided on the flipping plate 28. The clamping member 21c may be a gas claw or the like. When the turnover plate 28 turns over the surface of the display device 91, the positioning column 323 extends into the positioning hole 313, and the butt joint 32 on the turnover plate 28 is connected with the junction box 31 on the protection tool 92.
As a fourth embodiment of the reversing member 2, as shown in fig. 1 to 10, 16, and 17, the reversing member 2 includes a reversing plate 28, and a vacuum suction plate 21d that can be sucked to the back surface of the display device 91 is connected to the reversing plate 28. The vacuum suction tray 21d of the turnover member 2 is sucked to the back surface of the display device 91, and then the display device 91 is turned to an angle toward the imaging device 12; after the imaging device 12 captures an image, the overturning component 2 overturns the display device 91 and enables the display device 91 to be borne on the protection tool 92 again, and then the vacuum adsorption disc 21d loosens the display device 91, so that the conveying line 10 can convey the protection tool 92 and the display device 91 to the next station. The turnover part 2 comprises a base 29 arranged on one side of the conveying line 10, a turnover plate 28 rotatably connected to the base 29, and a turnover driving member for driving the turnover plate 28 to turn over, wherein the turnover driving member can be a motor, an air cylinder and the like. The abutment 32 and the vacuum chuck 21d may be provided on the inversion plate 28.
The reversing member 2 may completely replace the manual reversing operation of the display device 91. In a specific application, the imaging device 12 can adopt a full-frame camera to collect images, and the images do not need to be collected through the motion scanning of the imaging device 12, so that the detection efficiency is improved. Of course, a movement mechanism may be provided to control the movement locus of the imaging device 12. The imaging device 12 can be controlled to move along the X, Y, Z three directions so as to detect display devices with different sizes, and the product applicability is high.
The machine vision-based online detection system provided by the embodiment of the invention comprises a conveying line 10, wherein the conveying line 10 can be in butt joint with an automatic assembly line and can correct and position a display device 91. The turning unit 2 may turn the display device 91 by an appropriate angle such as 105 ° by a mechanical arm or the like, and synchronously turn on the power signal and the digital signal of the display device 91. The imaging device 12 collects the image of the screen to be detected through a camera and performs digital processing analysis through image processing software to realize detection. The conveyor line 10 may be a conventional roller+chain drive, and the overall dimensions may be customized to the size of the upstream and downstream lines. The assembly line working platform is provided with a correction part and a sensing device, when the display device 91 enters the equipment from the previous working procedure and stops running after triggering the sensing device, the correction device positions the display device 91 at a preset position of a visual system, the turnover part 2 is arranged on one side of the conveying line 10, the display device 91 with accurate positioning is fixed and turned by 105 degrees through a mechanical arm, the junction box 31 of the display device 91 is connected on a synchronous positioning, grabbing and turnover jig, a power signal and a digital signal of the display device 91 are automatically connected, the turnover plate 28 of the turnover part 2 can be fixedly provided with a butt joint 32, the butt joint 32 comprises a group of probes (joint conducting parts 322) which are arranged in a matrix, two positioning columns 323 and two push rod parts, and the junction box 31 on the protection tool 92 can be automatically positioned through the positioning columns 323. The junction box 31 is placed on the fixed slot of the protection tool 92, and the junction box 31 is provided with a data line, a power line, a group of detection points (box body conductive parts 312) arranged in a matrix and two positioning holes 313, and the data line and the power line of the junction box 31 are manually connected with the display device 91 in the previous step of detection. After the protection tool 92 carries the display device 91 and the junction box 31 and enters the darkroom together, the butt joint 32 is positioned by the positioning column 323 and is self-locked with the junction box 31, at the moment, the probes are correspondingly connected with the probe points one by one, and signals are communicated. After the detection is finished, the mechanical arm turns over-105 degrees to put the display device 91 back to the protection tool 92, meanwhile, the junction box 31 is put back to the fixed slot of the protection tool 92, the pneumatic push rod of the butt joint 32 stretches out, the junction box 31 is separated from the positioning column 323, and the turnover part 2 can be reset. The display device 91 for completing the detection can be transmitted out of the darkroom along with the protection tool 92.
The invention also provides an online detection method based on machine vision, which adopts the online detection system based on machine vision and comprises the following steps:
as shown in fig. 1 to 10, the protective tooling 92 is positioned on the conveyor line 10, the display device 91 is positioned on the protective tooling 92 with the screen of the display device 91 facing the protective tooling 92,
before the display device 91 enters the darkroom of the machine body 11, the display device 91 positioned on the protection tool 92 is connected to the junction box 31 by the cable 33 on the transmission line 10;
the protection tool 92 and the display device 91 are sent into the darkroom of the machine body 11 in groups through the transmission line 10;
the conveyor line 10 is suspended, and the display device 91 or the display device 91 and the protection tool 92 are subjected to position correction by the correction means, so that the position of the display device 91 is maintained at a set uniform position;
the display device 91 is turned over to an angle toward the imaging device by the turning-over part 2;
docking head 32 is docked with junction box 31 by flipping part 2 or a manipulator;
illuminating the display device 91 through the docking head 32 and the junction box 31 and causing a screen of the display device 91 to display a set image;
the imaging device 12 captures an image and performs recognition analysis.
As a first tilting method, as shown in fig. 1 to 10, 11, and 12, the tilting member 2 is configured to tilt the display device 91 to an angle toward the imaging device, and includes: the display device 91 and the protection tool 92 are simultaneously turned over to an angle facing the imaging device 12 through the upper mechanical arm 21a and the lower mechanical arm 22a, and then the protection tool 92 is turned over to the conveying line 10 through the lower mechanical arm 22 a; after the imaging device 12 captures an image, the lower mechanical arm 22a turns over the protection tool 92 to be attached to the display device 91, and then the display device 91 and the protection tool 92 are turned over to the conveying line 10 through the upper mechanical arm 21a and the lower mechanical arm 22 a.
As a second tilting method, as shown in fig. 1 to 10, and fig. 13 and 14, the tilting member 2 is configured to tilt the display device 91 to an angle toward the imaging device, and includes: the lifting part 21b passes through the protection tool 92 and jacks one side of the display device 91 to enable the display device 91 to turn over a set angle, and the display device 91 jacked by the lifting part 21b is continuously turned over to an angle towards the imaging device 12 through the mechanical arm; after the imaging device 12 captures an image, the mechanical arm turns over the display device 91 and the lifting part 21b is retracted, so that the display device 91 is carried on the protection tool 92 again.
As a third overturning manner, as shown in fig. 1 to 10 and 15, notch grooves 923 are preset at four corners of the protection tool 92, and the overturning process of the display device 91 to the angle facing the imaging device by the overturning component 2 includes the following steps: the clamping part 21c of the turning part 2 clamps and turns the display device 91 to an angle facing the imaging device 12 from the notch grooves 923 at the four corners of the protection tool 92; after the imaging device 12 captures an image, the clamping part 21c of the turning part 2 turns over the display device 91 and makes the display device 91 be carried on the protection tool 92 again.
As a fourth flipping method, as shown in fig. 1 to 10, and fig. 16 and 17, the flipping unit 2 flipping the display device 91 to an angle toward the imaging device includes the steps of: the vacuum suction tray 21d of the turnover member 2 is sucked to the back surface of the display device 91, and then the display device 91 is turned to an angle toward the imaging device 12; after the imaging device 12 captures an image, the overturning component 2 overturns the display device 91, and enables the display device 91 to be carried on the protection tool 92 again, and then enables the vacuum adsorption disc 21d to loosen the display device 91.
Specifically, during the overturning process, when the overturning component 2 fixes the display device 91, the butt joint 32 in the overturning component 2 is in butt joint with the junction box 31 in the accommodating groove 921 on the protection tool 92; when the tilting member 2 releases the display device 91, the abutment 32 in the tilting member 2 is disengaged from the junction box 31 on the protection tool 92 and the junction box 31 is allowed to fall again to the accommodation groove 921 of the protection tool 92.
According to the machine vision-based online detection system and the machine vision-based online detection method, the machine body 11 with the darkroom and the conveying line 10 for conveying the display device into the darkroom are arranged, the display device is turned to a set angle through the turning component, and the imaging device can detect the display device, so that continuous production and detection can be realized, the display device does not need to be taken down from the production line, the detection efficiency is high, the detection effect is good, and the detection automation degree is high.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (16)
1. The machine vision-based online detection system is characterized by comprising a machine body with a darkroom, wherein the machine body is arranged across a conveying line, and the conveying line is used for conveying a display device and a protection tool for loading the display device; one side of the machine body is provided with a feed inlet for a display device to enter the darkroom, the other side of the machine body is provided with a discharge outlet for the display device to be discharged from the darkroom, the conveying line penetrates through the feed inlet and the discharge outlet, an imaging device is arranged in the darkroom, the darkroom is internally provided with a turnover part for turning over the display device and the protection tool to enable the display device to face the imaging device, the display device is connected with a junction box, and a butt joint head for butt joint with the junction box is arranged in the darkroom;
The overturning component comprises an upper mechanical arm for overturning the display device and a lower mechanical arm for overturning the protection tool, the display device and the protection tool are overturned to an angle facing the imaging device through the upper mechanical arm and the lower mechanical arm at the same time, and then the protection tool is overturned to the conveying line through the lower mechanical arm; after the imaging device captures an image, the lower mechanical arm turns over the protection tool to be attached to the display device, and then the display device and the protection tool are turned over to the conveying line through the upper mechanical arm and the lower mechanical arm; the lower mechanical arm penetrates through a gap of a driving roller of the conveying line so as to support and overturn the protection tool from the lower part; the overturning component comprises a base arranged on one side of the conveying line, an overturning plate rotatably connected to the base and an overturning driving piece used for driving the overturning plate to overturn, and the butt joint and the upper mechanical arm are arranged on the overturning plate.
2. The machine vision-based on-line inspection system according to claim 1, wherein a correction unit for correcting the positions of the display device and the protection tool is provided in the darkroom.
3. A machine vision based on-line inspection method, characterized in that the machine vision based on-line inspection system according to any one of claims 1 to 2 is adopted, comprising the steps of:
the protection tool is positioned on a transmission line, a display device is positioned on the protection tool, the screen of the display device faces the protection tool, and the display device positioned on the protection tool is connected with a junction box through a cable on the transmission line; the protection tool and the display device are sent into the darkroom of the machine body in groups through a transmission line; tilting the display device to an angle towards the imaging device by a tilting member; the butt joint head is in butt joint with the junction box through the overturning part; illuminating the display device through the butt joint and the junction box; the imaging device captures images and performs recognition analysis;
the process of tilting the display device to an angle toward the imaging device by the tilting member includes the steps of:
the display device and the protection tool are simultaneously turned over to an angle facing the imaging device through the upper mechanical arm and the lower mechanical arm, and then the protection tool is turned over to the conveying line through the lower mechanical arm; after the imaging device captures an image, the lower mechanical arm overturns the protection tool to be attached to the display device, and the display device and the protection tool are overturned to the conveying line through the upper mechanical arm and the lower mechanical arm.
4. The machine vision based on-line inspection method of claim 3, wherein the docking head in the flip member is docked with the junction box on the protective tool when the flip member secures the display device during the flip; when the overturning part loosens the display device, the butt joint in the overturning part is separated from the junction box on the protection tool.
5. The machine vision-based online detection system is characterized by comprising a machine body with a darkroom, wherein the machine body is arranged across a conveying line, and the conveying line is used for conveying a display device and a protection tool for loading the display device; one side of the machine body is provided with a feed inlet for a display device to enter the darkroom, the other side of the machine body is provided with a discharge outlet for the display device to be discharged from the darkroom, the conveying line penetrates through the feed inlet and the discharge outlet, an imaging device is arranged in the darkroom, the darkroom is internally provided with a turnover part for turning over the display device and the protection tool to enable the display device to face the imaging device, the display device is connected with a junction box, and a butt joint head for butt joint with the junction box is arranged in the darkroom;
The overturning part comprises a lifting part for lifting the display device from the protection tool from bottom to top and a mechanical arm for overturning the display device, and the protection tool is provided with a clearance through hole for the lifting part to pass through; the lifting part penetrates through a gap of a driving roller in the conveying line and a clearance through hole of the protection tool, one side of the display device is jacked up to enable the display device to turn over a set angle, and then the display device jacked up by the lifting part is continuously turned over to an angle towards the imaging device through the mechanical arm; after the imaging device captures an image, the mechanical arm turns over the display device and the lifting component is retracted so that the display device is reloaded on the protection tool; the overturning component comprises a base arranged on one side of the conveying line, an overturning plate rotatably connected to the base and an overturning driving piece used for driving the overturning plate to overturn, and the butt joint and the mechanical arm are arranged on the overturning plate.
6. The machine vision-based on-line inspection system of claim 5, wherein a correction component is disposed within the darkroom for correcting the display device and the position of the protective tooling.
7. A machine vision based on-line inspection method, characterized in that it adopts the machine vision based on-line inspection system according to any one of claims 5 to 6, comprising the steps of:
the protection tool is positioned on a transmission line, a display device is positioned on the protection tool, the screen of the display device faces the protection tool, and the display device positioned on the protection tool is connected with a junction box through a cable on the transmission line; the protection tool and the display device are sent into the darkroom of the machine body in groups through a transmission line; tilting the display device to an angle towards the imaging device by a tilting member; the butt joint head is in butt joint with the junction box through the overturning part; illuminating the display device through the butt joint and the junction box; the imaging device captures images and performs recognition analysis;
the process of tilting the display device to an angle toward the imaging device by the tilting member further includes the steps of:
the lifting part passes through the protection tool and jacks one side of the display device to enable the display device to turn over a set angle, and the display device jacked by the lifting part is continuously turned over to an angle facing the imaging device through the mechanical arm; after the imaging device captures an image, the mechanical arm turns over the display device and the lifting part is retracted so that the display device is born on the protection tool again.
8. The machine vision based on-line inspection method of claim 7, wherein the docking head in the flip part is docked with the junction box on the protective tool when the flip part secures the display device during the flip; when the overturning part loosens the display device, the butt joint in the overturning part is separated from the junction box on the protection tool.
9. The machine vision-based online detection system is characterized by comprising a machine body with a darkroom, wherein the machine body is arranged across a conveying line, and the conveying line is used for conveying a display device and a protection tool for loading the display device; one side of the machine body is provided with a feed inlet for a display device to enter the darkroom, the other side of the machine body is provided with a discharge outlet for the display device to be discharged from the darkroom, the conveying line penetrates through the feed inlet and the discharge outlet, an imaging device is arranged in the darkroom, the darkroom is internally provided with a turnover part for turning over the display device and the protection tool to enable the display device to face the imaging device, the display device is connected with a junction box, and a butt joint head for butt joint with the junction box is arranged in the darkroom;
The four corners of the protection tool are provided with clearance notch grooves, and the overturning part comprises a clamping part for clamping and overturning the display device from the notch grooves of the protection tool; the clamping part of the overturning part clamps and overturns the display device from notch grooves at four corners of the protection tool to an angle facing the imaging device; after the imaging device captures an image, the clamping part of the overturning part overturns the display device and enables the display device to be born on the protection tool again; the turnover part comprises a base arranged at one side of the conveying line, a turnover plate rotatably connected with the base and a turnover driving piece for driving the turnover plate to turn over; the butt joint and the clamping component are arranged on the turnover plate; when the overturning plate overturns the surface of the display device, the positioning column stretches into the positioning hole, and the butt joint on the overturning plate is connected with the junction box on the protection tool.
10. The machine vision-based on-line inspection system according to claim 9, wherein a correction unit for correcting the positions of the display device and the protection tool is provided in the darkroom.
11. A machine vision based on-line inspection method, characterized in that it adopts the machine vision based on-line inspection system according to any one of claims 9 to 10, comprising the steps of:
the protection tool is positioned on a transmission line, a display device is positioned on the protection tool, the screen of the display device faces the protection tool, and the display device positioned on the protection tool is connected with a junction box through a cable on the transmission line; the protection tool and the display device are sent into the darkroom of the machine body in groups through a transmission line; tilting the display device to an angle towards the imaging device by a tilting member; the butt joint head is in butt joint with the junction box through the overturning part; illuminating the display device through the butt joint and the junction box; the imaging device captures images and performs recognition analysis;
the process of tilting the display device to an angle toward the imaging device by the tilting member includes the steps of:
the clamping part of the overturning part clamps and overturns the display device to an angle facing the imaging device from notch grooves of four corners of the protection tool; after the imaging device captures an image, the clamping part of the overturning part overturns the display device and enables the display device to be born on the protection tool again.
12. The machine vision based on-line inspection method of claim 11, wherein during the turning over process, the butt joint in the turning over part is butt jointed with the junction box on the protective tool when the turning over part fixes the display device; when the overturning part loosens the display device, the butt joint in the overturning part is separated from the junction box on the protection tool.
13. The machine vision-based online detection system is characterized by comprising a machine body with a darkroom, wherein the machine body is arranged across a conveying line, and the conveying line is used for conveying a display device and a protection tool for loading the display device; one side of the machine body is provided with a feed inlet for a display device to enter the darkroom, the other side of the machine body is provided with a discharge outlet for the display device to be discharged from the darkroom, the conveying line penetrates through the feed inlet and the discharge outlet, an imaging device is arranged in the darkroom, the darkroom is internally provided with a turnover part for turning over the display device and the protection tool to enable the display device to face the imaging device, the display device is connected with a junction box, and a butt joint head for butt joint with the junction box is arranged in the darkroom;
The turnover part comprises a turnover plate, and a vacuum adsorption disc capable of being adsorbed on the back of the display device is connected to the turnover plate; the vacuum adsorption disc of the turnover part is adsorbed on the back surface of the display device, and then the display device is turned to an angle facing the imaging device; after the imaging device captures an image, the overturning part overturns the display device and enables the display device to be borne on the protection tool again, then the vacuum adsorption disc loosens the display device, and the conveying line can convey the protection tool and the display device to the next station; the turnover part comprises a base arranged at one side of the conveying line, a turnover plate rotatably connected with the base and a turnover driving piece for driving the turnover plate to turn over; the butt joint and the vacuum adsorption disc are arranged on the turnover plate.
14. The machine vision-based on-line inspection system of claim 13, wherein a correction component is disposed within the darkroom for correcting the display device and the position of the protective tooling.
15. A machine vision based on-line inspection method, characterized in that it adopts the machine vision based on-line inspection system according to any one of claims 13 to 14, comprising the steps of:
The protection tool is positioned on a transmission line, a display device is positioned on the protection tool, the screen of the display device faces the protection tool, and the display device positioned on the protection tool is connected with a junction box through a cable on the transmission line; the protection tool and the display device are sent into the darkroom of the machine body in groups through a transmission line; tilting the display device to an angle towards the imaging device by a tilting member; the butt joint head is in butt joint with the junction box through the overturning part; illuminating the display device through the butt joint and the junction box; the imaging device captures images and performs recognition analysis;
the process of tilting the display device to an angle toward the imaging device by the tilting member includes the steps of:
the vacuum adsorption disc of the turnover part is adsorbed on the back surface of the display device, and then the display device is turned to an angle facing the imaging device; after the imaging device captures an image, the overturning component overturns the display device, enables the display device to be reloaded on the protection tool, and enables the vacuum adsorption disc to loosen the display device.
16. The machine vision based on-line inspection method of claim 15, wherein during the turning over process, the butt joint in the turning over part is butt jointed with the junction box on the protective tool when the turning over part fixes the display device; when the overturning part loosens the display device, the butt joint in the overturning part is separated from the junction box on the protection tool.
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| CN107228752A (en) * | 2017-05-17 | 2017-10-03 | 耐世特凌云驱动系统（芜湖）有限公司 | Sliding sleeve automatic detection differential spring coil apparatus |
| CN110130086B (en) * | 2019-03-22 | 2021-10-26 | 沈阳工业大学 | Automatic whole visual detection of upset of scarf tip and float hair adsorption equipment |
| CN110779920A (en) * | 2019-10-30 | 2020-02-11 | 中国计量大学 | Pearl detection device |
| CN111289536B (en) * | 2020-04-07 | 2021-10-26 | 深圳回收宝科技有限公司 | Defect detection device of electronic equipment screen |
| CN112161994A (en) * | 2020-10-29 | 2021-01-01 | 厦门福信光电集成有限公司 | Automatic optical inspection blanking machine of AOI |
| CN115754492B (en) * | 2021-10-28 | 2024-01-05 | 南京捷希科技有限公司 | Antenna test system |
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