CN112965276B - Deflection accuracy detection machine and control method thereof - Google Patents
Deflection accuracy detection machine and control method thereof Download PDFInfo
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- CN112965276B CN112965276B CN202110257388.3A CN202110257388A CN112965276B CN 112965276 B CN112965276 B CN 112965276B CN 202110257388 A CN202110257388 A CN 202110257388A CN 112965276 B CN112965276 B CN 112965276B
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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Abstract
The invention provides a bias pasting precision detection machine and a control method thereof, which relate to the technical field of display equipment production and comprise a visual detection mechanism, a material conveying mechanism and a control unit; the visual detection mechanism comprises a camera detection device, a camera displacement device and a displacement power device connected with the camera displacement device; the material conveying mechanism comprises a polaroid fixing device and a feeding device connected with the polaroid fixing device; the polaroid fixing device comprises an upper fixing device and a lower fixing device; in the first state, the lower fixing device fixes the polaroid, and the camera detection device is positioned on the upper side of the polaroid to detect the laminating precision of the polaroid; in the second state, the upper fixing device fixes the polaroid, and the camera detection device is positioned on the lower side of the polaroid to detect the laminating precision of the polaroid. By combining the control method, the embodiment of the invention can solve the problems that the existing polaroid laminating precision detection device has more camera material requirements and the accuracy of the detection result is possibly low.
Description
Technical Field
The invention relates to the technical field of display equipment production, in particular to a deflection pasting precision detection machine and a control method thereof.
Background
In the production process of liquid crystal display equipment, polarizer lamination precision generally needs to be detected, and the current alignment mode generally adopts mechanical alignment and alignment precision detection through CCD vision to correct. The CCD vision alignment precision detection is completed by a CCD vision alignment precision detection camera which is a detection device commonly used in the field of panel attachment precision detection, the working principle of the CCD vision alignment precision detection camera is that a special CCD camera, an industrial lens and a light source are used for photographing and capturing images of characteristic positions on a product, an image processor is used for collecting image data for image processing, and then an actual offset value of the product is calculated by comparing the actual offset value with a preset reference position so as to achieve quick, closed-loop and high-precision alignment.
The existing polaroid fitting precision detection device is generally provided with two sets of CCD vision alignment precision detection cameras which face upwards and downwards respectively, and after the top surface of the polaroid is photographed by the upper side camera, the polaroid is adsorbed and transported by a mechanical arm, so that the polaroid is photographed by the bottom surface of the lower side camera through the process of the upper side camera. The detection mode needs to move the polaroid to be detected and needs two sets of CCD vision alignment precision detection cameras to realize detection, so that the camera material demand is more, and the accuracy of the detection result is possibly low due to the fact that the polaroid moves.
Disclosure of Invention
Therefore, it is necessary to provide an offset precision inspection machine and a control method thereof for solving the problems that the existing polarizer attachment precision inspection device has more camera material requirements and the accuracy of the inspection result may not be high due to the movement of the polarizer.
The invention provides a bias pasting precision detection machine, which comprises:
the visual detection mechanism is used for detecting the laminating precision of the polaroid;
the material conveying mechanism is used for fixing and conveying the polaroid;
the control unit is connected with the visual detection mechanism and the material conveying mechanism so as to control the working states of the visual detection mechanism and the material conveying mechanism;
the visual inspection mechanism includes:
the camera detection device is used for detecting the lamination precision of the polaroid through vision;
the camera displacement device comprises a horizontal displacement device and a vertical displacement device, and the camera detection device is arranged at one end of the horizontal displacement device; the other end of the horizontal displacement device is matched with the vertical displacement device, so that the camera detection device can adjust the position of the camera detection device relative to the polaroid;
the displacement power device is connected with the camera displacement device and provides power for the camera displacement device;
the fortune material mechanism includes:
the polaroid fixing device comprises an upper fixing device and a lower fixing device, and is used for fixing the position of the polaroid;
the feeding device is connected with the polaroid fixing device to finish the transportation of the polaroid;
in a first state, the lower fixing device fixes the polaroid, and the camera detection device is positioned on the upper side of the polaroid so as to detect the laminating precision of the polaroid;
in the second state, the upper fixing device fixes the polaroid, and the camera detection device is positioned on the lower side of the polaroid so as to detect the laminating precision of the polaroid.
In one embodiment, the machine for detecting accuracy of partial pasting further comprises a camera positioning device connected with the control unit, wherein the camera positioning device is arranged on the camera detection device and used for detecting whether the camera detection device is located at an expected target position.
In one embodiment, the camera positioning device comprises a planar laser dot-matrix instrument.
In one embodiment, the horizontal displacement device comprises a connecting part, a camera fixing end and a turnover motor set positioned between the connecting part and the camera fixing end, wherein the connecting part is matched with the vertical displacement device;
the overturning motor set comprises a first motor and a second motor, wherein the central axes of the first motor and the second motor are vertical to each other;
the first motor is connected with the connecting part, and when the first motor is started, the camera detection device is close to or far away from the right upper side or the right lower side of the polaroid;
the second motor is connected with the camera detection device, and when the second motor is started, the shooting direction of the camera detection device is changed under the driving of the camera detection device.
In one embodiment, the displacement power means comprises a cylinder drive.
In one embodiment, the vertical displacement device comprises a vertical slide rail, and the connecting part comprises a slide block; the sliding block is matched with the vertical sliding rail and can move along the vertical sliding rail under the driving of the cylinder driving device.
In one embodiment, each of the upper fixing device and the lower fixing device includes a fixing plate having a negative pressure cavity and a negative pressure device communicated with the negative pressure cavity of the fixing plate, so as to fix the polarizer on the fixing plate by a negative pressure effect.
In one embodiment, the polarizer fixing device further includes a plane displacement motor set, and the plane displacement motor set is respectively connected to the upper fixing device and the lower fixing device to drive the upper fixing device and the lower fixing device to rotate in a plane parallel to the polarizer.
The invention also provides a method for controlling the offset accuracy detection machine, which comprises the following steps:
controlling the lower fixing device to fix the polaroid;
controlling the camera displacement device to move the camera detection device to be right above the polaroid;
judging whether the camera detection device is located at an expected target position or not, and correspondingly adjusting the position of the camera detection device according to a judgment result;
after the camera detection device is determined to be located at an expected target position, controlling the camera detection device to take a picture for detection, and after the detection is finished, controlling the camera detection device to be away from the position right above the polaroid;
controlling the upper fixing device to fix the polaroid and driving the lower fixing device to leave the position right below the polaroid;
controlling a camera displacement device and a displacement power device to drive the camera detection device to move to the position right below the polaroid, and enabling the shooting view of the camera detection device to be right opposite to the polaroid;
judging whether the camera detection device is located at an expected target position or not, and correspondingly adjusting the position of the camera detection device according to a judgment result;
and after the camera detection device is determined to be located at the expected target position, controlling the camera detection device to take a picture for detection.
In one embodiment, the step of determining whether the camera detection device is located at an expected target position and adjusting the position of the camera detection device according to the determination result includes:
judging whether the polaroids are all positioned in the scanning range;
if yes, judging that the camera detection device is located at an expected target position;
if not, judging that the camera detection device is not located at the expected target position, and controlling the camera displacement device and the displacement power device to drive the camera detection device to move until the camera detection device is located at the expected target position.
One of the above technical solutions has the following advantages or beneficial effects:
in the embodiment of the invention, after the feeding device transports the polaroid to the preset detection position, the control unit controls the lower fixing device to fix the polaroid; then, the control unit controls the camera displacement device to enable the camera detection device to move above the polaroid positive device, and after the camera detects that the detection position is reached, the control unit controls the camera detection device to carry out photographing detection on the polaroid; after the detection is completed, the control unit controls the horizontal displacement device to operate, so that the camera detection device is away from the position right above the polaroid. Then, under the action of the control unit, the upper fixing device can fix the polaroid and drive the lower fixing device to leave the position right below the polaroid; then, the control unit controls the camera displacement device and the displacement power device to drive the camera detection device to move to a detection position right below the polaroid along the vertical displacement device, and the shooting view of the camera detection device is enabled to be right opposite to the polaroid; and finally, the control unit controls the camera detection device to perform photographing detection on the polaroid again. Need not do any removal at the testing process of this embodiment to the polaroid, only need a detection camera just can accomplish detection achievement moreover, consequently, this technical scheme can solve current polaroid laminating precision detection device camera material demand more well to and because the removal of polaroid and the testing result degree of accuracy that causes probably is not high problem.
Drawings
FIG. 1 is a schematic structural view of a deflection accuracy testing machine according to the present invention;
FIG. 2 is a partially enlarged view of the region A of the machine for measuring offset accuracy of the present invention in FIG. 1;
FIG. 3 is a block diagram of the circuit structure of the offset accuracy testing machine of the present invention;
fig. 4 is a schematic flow chart of the control method of the offset accuracy detection machine according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
100. a visual detection mechanism; 110. a camera detection device; 120. a camera displacement device; 121. a horizontal displacement device; 1211. a connecting portion; 1212. a first motor; 1213. a second motor; 1214. a camera fixing end; 122. a vertical displacement device; 1221. a vertical slide rail; 1222. a slider; 200 a material conveying mechanism; 210; a polarizer fixing device; 2101. an upper fixing device, 2102 and a lower fixing device; 300. a control unit; 400. a camera positioning device.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is apparent that the specific details set forth in the following description are merely exemplary of the invention, which can be practiced in many other embodiments that depart from the specific details disclosed herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
It will be understood that when an element is referred to as being "secured to" 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. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, fig. 2, and fig. 3, the present invention provides a bias attaching precision detecting machine, including:
a visual inspection mechanism 100 for inspecting the lamination accuracy of the polarizer;
a material conveying mechanism 200 for fixing and conveying the polarizer;
the control unit 300 is connected with the visual detection mechanism 100 and the material conveying mechanism 200 to control the working states of the visual detection mechanism 100 and the material conveying mechanism 200;
a camera inspection device 110 for inspecting the lamination accuracy of the polarizer by vision;
the camera displacement device 120 comprises a horizontal displacement device 121 and a vertical displacement device 122, and the camera detection device 110 is arranged at one end of the horizontal displacement device 121; the other end of the horizontal displacement device 121 is matched with the vertical displacement device 122, so that the camera detection device 110 adjusts the position of the camera detection device relative to the polarizer;
a displacement power device connected with the camera displacement device 120 and providing power for the camera displacement device;
the polarizer fixing device 210 includes an upper fixing device 2101 and a lower fixing device 2102, and is configured to fix a position of a polarizer;
a feeding device 220 connected to the polarizer fixing device 210 to complete the transportation of the polarizer;
in the first state, the lower fixing device 2102 fixes the polarizer, and the camera inspection device 110 is located on the upper side of the polarizer to perform bonding precision inspection on the polarizer;
in the second state, the upper fixing device 2101 fixes the polarizer, and the camera inspection device 110 is located at the lower side of the polarizer to perform the inspection of the lamination accuracy of the polarizer.
The camera detection device 110 includes a CCD vision alignment precision detection camera.
The polaroid is a necessary component for imaging of the liquid crystal display, and in the assembling process, the polaroid is tightly attached to the front side and the back side of the liquid crystal glass and forms a liquid crystal sheet together with the liquid crystal glass. In the attaching process, the polarizer needs to cover all the display areas of the liquid crystal glass substrate, otherwise, the imaging of the liquid crystal sheet can be directly influenced, and therefore, higher requirements are provided for the position accuracy of the attachment of the polarizer. With the improvement of the requirements of the manufacturing process of the liquid crystal display area, the specification and the size of some polaroids are the same as those of liquid crystal glass, and the requirements on the attachment of the polaroids are very high.
In order to ensure the imaging effect of the liquid crystal sheet and the assembling process of the liquid crystal sheet at the same time, the current contraposition mode generally adopts mechanical contraposition and CCD visual contraposition precision detection to carry out correction. The CCD vision counterpoint precision detection is completed by a CCD vision counterpoint precision detection camera, the camera is detection equipment commonly used in the field of panel laminating precision detection, the working principle is that characteristic positions on a product are photographed and taken images through a special CCD camera, an industrial lens and a light source, image data are collected through an image processor to be subjected to image processing, then the actual offset value of the product is calculated through comparison with a preset reference position, so that the purposes of rapidness, closed loop and high precision counterpoint are achieved, the specific structure belongs to the common technology in the field, and therefore the repeated description is omitted.
In an embodiment, after the feeding device 220 transports the polarizer to a predetermined detection position, the control unit 300 controls the lower fixing device 2102 to fix the polarizer. Then, the control unit 300 controls the camera moving device 120 to move the camera inspection device 110 above the polarizer, and after the camera detects that the inspection position is reached, the control unit 300 controls the camera inspection device 110 to photograph the polarizer for inspection. After the inspection is completed, the control unit 300 controls the horizontal displacement device 121 to operate, so that the camera inspection device 110 is away from the position right above the polarizer. Then, under the action of the control unit 300, the upper fixing device fixes the polarizer and drives the lower fixing device 2102 away from the position right below the polarizer. Then, the control unit 300 controls the camera moving device 120 and the moving power device to drive the camera inspection device 110 to move along the vertical moving device 122 to the inspection position directly below the polarizer, and make the shooting view of the camera inspection device 110 directly face the polarizer. Finally, the control unit 300 controls the camera inspection device 110 to perform photo inspection on the polarizer again.
In the testing process of this embodiment, need not do any removal to the polaroid, only need a CCD vision counterpoint precision to detect the camera in addition and just can accomplish the detection achievement of whole polaroid laminating precision, consequently, this technical scheme can solve current polaroid laminating precision detection device camera material demand more well to and because the removal of polaroid and the testing result degree of accuracy that causes probably is not high problem.
Referring to fig. 4, the control unit 300 may include a single chip microcomputer and a memory storing an executable program, and the single chip microcomputer executes the following steps when running the executable program:
step S100: controlling the lower fixing device 2102 to fix the polarizer;
step S200: controlling the camera displacement device 120 to move the camera detection device 110 to a detection position right above the polarizer;
step S300: controlling the camera detection device 110 to photograph and detect, and controlling the camera detection device 110 to leave the position right above the polaroid after detection is finished;
step S400: controlling the upper fixing device to fix the polarizer and driving the lower fixing device 2102 to leave the right below the polarizer;
step S500: controlling the camera displacement device 120 and the displacement power device to drive the camera detection device 110 to move to a detection position right below the polarizer, and enabling the shooting view of the camera detection device 110 to be opposite to the polarizer;
step S600: and controlling the camera detection device 110 to take a picture for detection.
In one embodiment, the machine for detecting the accuracy of partial pasting further comprises a camera positioning device 400 connected to the control unit 300, wherein the camera positioning device 400 is disposed on the camera detection device 110 for detecting whether the camera detection device 110 is located at the expected target position.
In this embodiment, after the control unit 300 controls the camera moving device 120 to move the camera detection device 110 to the position above the polarizer, the camera positioning device 400 disposed on the camera detection device 110 detects whether the camera detection device 110 is located at the expected target position in real time, and if the camera detection device 110 is located at the expected target position, the control unit 300 continues to control the camera detection device 110 to perform photographing detection on the polarizer; if the camera detecting device 110 is not located at the expected target position, the control unit 300 controls the camera displacement device 120 and the displacement power device to drive the camera detecting device 110 to move until the camera positioning device 400 detects that the camera detecting device 110 is located at the expected target position.
The method for determining whether the camera inspection device 110 is located at the expected target position by the camera inspection device 110 may include determining whether all polarizers are located within the scanning range; if the polarizer is located in the scanning range, the camera inspection device 110 is determined to be located at the expected target position; if the polarizer portion is out of the scanning range, the camera inspection device 110 is not located at the desired target position.
Compared with the prior art, the position of the camera detection device 110 can be automatically adjusted according to the size of the polaroid, so that the attaching precision detection machine can automatically adapt to attaching precision detection of polaroids of different specifications, and the practicability is higher.
In one embodiment, referring to fig. 1 and 2, the camera positioning device 400 includes a plane laser dot-matrix device.
In this embodiment, the camera detection device 110 includes a planar laser dot-matrix instrument, and the planar laser dot-matrix instrument can determine whether all the polarizer is located in the scanning range by emitting a laser dot matrix and receiving a reflected laser signal. Specifically, if a complete area which is located in the same plane and has edges around exists in the laser dot matrix, whether all the polaroids are located in the scanning range is judged; if there is a region in the same plane in the laser lattice and the extreme edge part of the region is still in the same plane, the polarizer part is considered to be beyond the scanning range.
In one embodiment, referring to fig. 2, the horizontal displacement device 121 includes a connecting portion 1211, a camera fixing end 1214, and a turning motor set located between the connecting portion 1211 and the camera fixing end 1214, wherein the connecting portion 1211 is disposed in cooperation with the vertical displacement device 122;
the turnover motor set comprises a first motor 1212 and a second motor 1213, wherein the central axes of the first motor 1212 and the second motor 1213 are perpendicular to each other;
the first motor 1212 is connected to the connection portion 1211, and when the first motor 1212 is activated, the camera detection apparatus 110 is close to or away from the polarizer right above or right below;
the second motor 1213 is connected to the camera detection device 110, and when the second motor 1213 is activated, the camera detection device 110 is driven to change the shooting direction.
In this embodiment, the first motor 1212 is used to change the position of the horizontal displacement device 121, which when rotated can drive the camera detection device 110 to approach or move away from the polarizer directly above or below the polarizer; the second motor 1213 is used to adjust the shooting direction of the camera inspection device 110, for example, when the horizontal displacement device 121 is moved under the polarizer by the vertical displacement device 122 and the displacement power device, the shooting direction of the camera inspection device 110 is downward, in order to enable the camera inspection device 110 to shoot the polarizer above, the second motor 1213 needs to be started and drive the camera inspection device 110 to rotate 180 degrees, so that the shooting direction of the camera inspection device 110 is upward.
In one embodiment, the displacement power means comprises a cylinder drive.
In one embodiment, referring to fig. 2, the vertical displacement device 122 includes a vertical slide rail 1221, and the connecting portion 1211 includes a slider 1222; the slider 1222 is matched with the vertical slide rail 1221, and can move along the vertical slide rail 1221 under the driving of the cylinder driving device.
In one embodiment, referring to fig. 2, each of the upper fixing device 2101 and the lower fixing device 2102 includes a fixing plate having a negative pressure cavity and a negative pressure device communicated with the negative pressure cavity of the fixing plate to fix the polarizer on the fixing plate by a negative pressure effect.
In one embodiment, referring to fig. 2, the polarizer fixing device 210 further includes a plane-shift motor assembly, and the plane-shift motor assembly is respectively connected to the upper fixing device 2101 and the lower fixing device 2102, so as to drive the upper fixing device 2101 and the lower fixing device 2102 to rotate in a plane parallel to the polarizer.
The invention also provides a method for controlling the offset accuracy detection machine, which comprises the following steps:
controlling the lower fixing device 2102 to fix the polarizer;
controlling the camera displacement device 120 to move the camera detection device 110 to a position right above the polarizer;
judging whether the camera detection device 110 is located at an expected target position, and correspondingly adjusting the position of the camera detection device 110 according to the judgment result;
after determining that the camera detection device 110 is located at the expected target position, controlling the camera detection device 110 to take a picture for detection, and after the detection is finished, controlling the camera detection device 110 to be away from the position right above the polarizer;
controlling the upper fixing device to fix the polarizer and driving the lower fixing device 2102 to leave the right below the polarizer;
controlling the camera displacement device 120 and the displacement power device to drive the camera detection device 110 to move to the position right below the polaroid, and enabling the shooting view of the camera detection device 110 to be right opposite to the polaroid;
judging whether the camera detection device 110 is located at an expected target position, and correspondingly adjusting the position of the camera detection device 110 according to the judgment result;
after determining that the camera detection device 110 is located at the expected target position, controlling the camera detection device 110 to take a picture for detection.
In the above embodiments, the control method and the workflow of the misalignment precision detection machine have been specifically described in combination with the specific structure of the misalignment precision detection machine, and are not described herein again. Since the same method and flow as those in the above embodiment are adopted in this embodiment, the embodiment of the present invention has the same beneficial effects as those in the above embodiment.
In one embodiment, the step of determining whether the camera detection device 110 is located at the expected target position, and making a corresponding adjustment to the position of the camera detection device 110 according to the determination result includes:
judging whether the polaroids are all positioned in the scanning range;
if yes, determining that the camera detection device 110 is located at the expected target position;
if not, it is determined that the camera detection device 110 is not located at the expected target position, and the camera displacement device 120 and the displacement power device are controlled to drive the camera detection device 110 to move until the camera detection device 110 is located at the expected target position.
In the above embodiments, the control method and the workflow of the misalignment precision detection machine have been specifically described in combination with the specific structure of the misalignment precision detection machine, and are not described herein again. Since the same method and flow as those in the above embodiment are adopted in this embodiment, the embodiment of the present invention has the same beneficial effects as those in the above embodiment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes, substitutions and alterations can be made without departing from the spirit and scope of the invention. Therefore, the protection scope of the present patent shall be subject to the claims.
Claims (10)
1. The utility model provides a lean on and paste precision detection machine which characterized in that includes:
the visual detection mechanism is used for detecting the laminating precision of the polaroid;
the material conveying mechanism is used for fixing and conveying the polaroid;
the control unit is connected with the visual detection mechanism and the material conveying mechanism so as to control the working states of the visual detection mechanism and the material conveying mechanism;
the visual inspection mechanism includes:
the camera detection device is used for detecting the attaching precision of the polaroid through vision;
the camera displacement device comprises a horizontal displacement device and a vertical displacement device, and the camera detection device is arranged at one end of the horizontal displacement device; the other end of the horizontal displacement device is matched with the vertical displacement device so that the camera detection device can adjust the position of the camera detection device relative to the polaroid;
the displacement power device is connected with the camera displacement device and provides power for the camera displacement device;
the fortune material mechanism includes:
the polaroid fixing device comprises an upper fixing device and a lower fixing device, and is used for fixing the position of the polaroid;
the feeding device is connected with the polaroid fixing device to finish the transportation of the polaroid;
in a first state, the lower fixing device fixes the polaroid, and the camera detection device is positioned on the upper side of the polaroid so as to detect the laminating precision of the polaroid;
in the second state, the upper fixing device fixes the polaroid, and the camera detection device is positioned on the lower side of the polaroid so as to detect the laminating precision of the polaroid.
2. The machine for detecting the accuracy of partial pasting according to claim 1, further comprising a camera positioning device connected to said control unit, said camera positioning device being disposed on said camera detecting device for detecting whether said camera detecting device is located at an expected target position.
3. The machine of claim 2, wherein the camera positioning device comprises a planar laser dot-matrix machine.
4. The offset precision detection machine according to claim 2 or 3, wherein the horizontal displacement device comprises a connecting part, a camera fixing end, and a turnover motor set positioned between the connecting part and the camera fixing end, and the connecting part is matched with the vertical displacement device;
the overturning motor set comprises a first motor and a second motor, wherein the central axes of the first motor and the second motor are vertical to each other;
the first motor is connected with the connecting part, and when the first motor is started, the camera detection device is close to or far away from the right upper side or the right lower side of the polaroid;
the second motor is connected with the camera detection device, and when the second motor is started, the shooting direction of the camera detection device is changed under the driving of the camera detection device.
5. The machine according to claim 4, wherein said displacement power unit comprises a cylinder driving unit.
6. The machine according to claim 5, wherein the vertical displacement device comprises a vertical slide rail, and the connecting portion comprises a slider; the sliding block is matched with the vertical sliding rail and can move along the vertical sliding rail under the driving of the cylinder driving device.
7. The machine for detecting deflection accuracy of claim 6, wherein each of the upper fixing device and the lower fixing device comprises a fixing plate having a negative pressure cavity and a negative pressure device communicating with the negative pressure cavity of the fixing plate, so as to fix the polarizer on the fixing plate by a negative pressure effect.
8. The machine according to claim 7, wherein the polarizer fixing device further comprises a plane-shift motor set, and the plane-shift motor set is respectively connected to the upper fixing device and the lower fixing device to drive the upper fixing device and the lower fixing device to rotate in a plane parallel to the polarizer.
9. A control method of a bias pasting precision detection machine, which is implemented based on the bias pasting precision detection machine according to any one of claims 1-8, and is characterized by comprising the following steps:
controlling the lower fixing device to fix the polaroid;
controlling the camera displacement device to move the camera detection device to be right above the polaroid;
judging whether the camera detection device is located at an expected target position or not, and correspondingly adjusting the position of the camera detection device according to a judgment result;
after the camera detection device is determined to be located at an expected target position, controlling the camera detection device to take a picture for detection, and after the detection is finished, controlling the camera detection device to be away from the position right above the polaroid;
controlling the upper fixing device to fix the polarizer and driving the lower fixing device to leave the right below the polarizer;
controlling a camera displacement device and a displacement power device to drive the camera detection device to move to the position right below the polaroid, and enabling the shooting view of the camera detection device to be right opposite to the polaroid;
judging whether the camera detection device is located at an expected target position or not, and correspondingly adjusting the position of the camera detection device according to a judgment result;
and after the camera detection device is determined to be located at the expected target position, controlling the camera detection device to take a picture for detection.
10. The method for controlling the misalignment accuracy detection machine according to claim 9, wherein the step of determining whether the camera detection device is located at an expected target position and adjusting the position of the camera detection device accordingly according to the determination result comprises:
judging whether the polaroids are all positioned in the scanning range;
if yes, judging that the camera detection device is located at an expected target position;
if not, judging that the camera detection device is not located at the expected target position, and controlling the camera displacement device and the displacement power device to drive the camera detection device to move until the camera detection device is located at the expected target position.
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