CN101968343A - Method for detecting automobile door based on robot monocular vision measurement - Google Patents
Method for detecting automobile door based on robot monocular vision measurement Download PDFInfo
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- CN101968343A CN101968343A CN 201010286640 CN201010286640A CN101968343A CN 101968343 A CN101968343 A CN 101968343A CN 201010286640 CN201010286640 CN 201010286640 CN 201010286640 A CN201010286640 A CN 201010286640A CN 101968343 A CN101968343 A CN 101968343A
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Abstract
The invention discloses a method for detecting an automobile door based on robot monocular vision measurement, comprising the following steps of: (1) positioning a standard automobile door in a positioning workpiece, setting a plurality of measured points on the edges of the standard automobile door and a measured automobile door and setting a plurality of mark points on the positioning workpiece; (2) solving the three-dimensional coordinates of the first mark point; (3) solving the three-dimensional coordinates of the first measured point; (4) calculating the gap distance between the first mark point on the positioning workpiece and the first measured point on the standard automobile door; (5) repeating the steps (2)-(4) to accomplish the measurement on the gap distances among all mark points on the positioning workpiece and all measured points on the standard automobile door; and (6) replacing the standard automobile door, fixing the measured automobile door in the position of the standard automobile door to accomplish the measurement on the gap distances among the mark points on the positioning workpiece and the measured points on the standard automobile door. By adopting the method, the measuring precision can reach 0.18 mm.
Description
Technical field
The present invention relates to a kind of detection method of automobile cubing, the invention particularly relates to the detection method of the arrangements for automotive doors of measuring based on robot monocular vision.
Background technology
Auto parts must detect it before the entrucking after punching press or injection moulding are come out, and carry out by means of cubing and detect Chang Bixu.Cubing (Checking Fixture) is just causing the great attention of more and more enterprises as the important auxiliary products of die industry.Production for self needs and its higher added value, many mould enterprises with it as an important developing direction.The correlation technique of cubing as a kind of new technology, is also just introduced by increasing mould enterprise.
The automobile cubing is by detection architecture location structure, clamping structure, supporting construction, base, and other slave parts constitute.Existing design is according to concrete part, according to inspection requirements, one by one, design corresponding structure progressively, and then is assembled together, and finally realizes the exploitation of cubing.This is a complexity and loaded down with trivial details process, and each design all will start anew, and is difficult to reuse previous design achievement, can not directly bring utilization to expert's mature experience, cause duplication of labour amount big, design loaded down with trivial details, to the exploitation designer require problems such as height.
At present, machine vision metrology has obtained development apace, makes vision sensor make the exploitation of cubing that great development arranged to the measurement of putting on the part by robot movement, has improved the flexibility of cubing design.The present detection method that adopts usually based on this technology moves by the computer-controlled robot then and measures each measured point for camera is contained on robot end's the flange, directly obtains the D coordinates value of measured point by coordinate transform.Yet, commercial now most of industrial robots, its positional precision is directly measured for robot and bring bigger error than the low order of magnitude of its repeatable accuracy.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the detection method of the arrangements for automotive doors of measuring based on robot monocular vision of a kind of flexibility that has improved cubing and automaticity is provided.
The detection method of the arrangements for automotive doors of measuring based on robot monocular vision of the present invention, it may further comprise the steps:
(1) the standard car door is positioned in the location workpiece, sets a plurality of measured points at the edge of standard car door and tested car door and on the workpiece inwall of location, set a plurality of gauge points, set up the stereoscopic vision measuring system and demarcate the inside and outside parameter of camera;
(2) computer-controlled robot move to first gauge point near, write down the three dimensional space coordinate of robot of this moment, the image that camera is taken first gauge point solves the three dimensional space coordinate of first gauge point;
(3) computer-controlled robot move to first measured point near, write down the three dimensional space coordinate of robot of this moment, the image that camera is taken first measured point solves the three dimensional space coordinate of first measured point;
(4) by formula calculate the location on the workpiece first gauge point and the space distance of first measured point on the mark standard car door and deposit computing machine in;
(5) repeat the space Determination of distance that all measured points on gauge points all on the workpiece of location and the mark standard car door are finished in described step (2)-(4);
(6) the standard car door is changed, tested car door is fixed on the position of standard car door, finishes the gauge point on the workpiece of location and the space Determination of distance of the measured point on the tested car door with the same trajectories of the mensuration of a plurality of gauge points of finishing the standard car door and measured point mobile robot successively according to step (2)-(5) then;
(7) whether standard of comparison car door and tested car door and the space distance of locating workpiece meet production requirement to judge tested car door.
Adopt the beneficial effect of the inventive method to be: this device has adopted the distance error model, at a location of measured piece placed around workpiece, checks by the distance of putting on point and the measured piece on the measurement and positioning workpiece whether product is qualified.Obtain its measuring accuracy by experiment and can arrive 0.18mm.The technical program adopts based on the robotic vision measuring system, has improved the recycling of automobile cubing, has noncontact, fast, the flexible good and high outstanding advantage of automaticity of speed, has saved the inspection cost of auto parts greatly.
Description of drawings
Fig. 1 is the mensuration fundamental diagram that adopts the detection method examination criteria car door of the arrangements for automotive doors of measuring based on robot monocular vision of the present invention;
Fig. 2 adopts the detection method of the arrangements for automotive doors of measuring based on robot monocular vision of the present invention to detect the mensuration fundamental diagram of tested car door.
Embodiment
Below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described further:
The detection method of the arrangements for automotive doors of measuring based on robot monocular vision, at first the standard car door is positioned in the location workpiece, set a plurality of measured points (as A at the edge of standard car door and tested car door, B) (the definite method in standard car door and tested car door measured point can be to paste a gauge point in the same position of standard car door and tested car door earlier, paste a series of measured points every the 3cm clockwise direction in vehicle door edge then) and on the workpiece inwall of location, set a plurality of gauge points (as a, b), (setting up stereoscopic vision measuring system method can edit referring to Zhang Guangjun: " photoelectricity test technology " to set up the stereoscopic vision measuring system, China Measuring Press, 2008,304-307) and demarcate camera inner parameter and external parameter, the inside calibrating parameters of camera comprises (effective focal length f, comprehensive distortion Δ x, Δ y, image planes center (Cx, Cy)), external parameter comprises (translation and rotation matrix have reflected that the three-dimensional world coordinate is tied to the transformational relation of camera coordinate system).The standard car door can adopt " 3-2-1 " positioning principle to fix.At first carry out the mensuration of standard car door as shown in Figure 1: the computer-controlled robot move to first gauge point near, write down the three dimensional space coordinate of robot of this moment, the image that camera is taken first gauge point solves the three dimensional space coordinate of first gauge point; The computer-controlled robot move to first measured point near, write down the three dimensional space coordinate of robot of this moment, the image that camera is taken first measured point solves the three dimensional space coordinate of first measured point; Pass through formula
Calculate the location on the workpiece first gauge point and the space distance of first measured point on the mark standard car door and deposit computing machine in; Repeat the space Determination of distance that all measured points on gauge points all on the workpiece of location and the mark standard car door are finished in described step (2)-(4); First gauge point coordinate method for solving (can adopt the pin-hole imaging model), be generally projection model and calibrating parameters according to video camera, to the image calibration that distorts, go out the three dimensional space coordinate of first gauge point again by stereo vision sensor three-dimensional measurement model solution respectively.Carry out the mensuration of tested car door then as shown in Figure 2: the standard car door is changed, tested car door is fixed on the position of standard car door, finishes the gauge point on the workpiece of location and the space Determination of distance of the measured point on the tested car door with the same trajectories of the mensuration of a plurality of gauge points of finishing the standard car door and measured point mobile robot successively according to the assay method of standard car door then; Whether last standard of comparison car door and tested car door and the space distance of locating workpiece meet production requirement to judge tested car door.
(1) the standard car door is positioned in the location workpiece, sets a plurality of measured points at the edge of standard car door and tested car door and on the workpiece inwall of location, set a plurality of gauge points, set up the stereoscopic vision measuring system and demarcate the inside and outside parameter of camera;
(2) computer-controlled robot move to first gauge point near, write down the three dimensional space coordinate of robot of this moment, the image that camera is taken first gauge point solves the three dimensional space coordinate of first gauge point;
(3) computer-controlled robot move to first measured point near, write down the three dimensional space coordinate of robot of this moment, the image that camera is taken first measured point solves the three dimensional space coordinate of first measured point;
(4) by formula calculate the location on the workpiece first gauge point and the space distance of first measured point on the mark standard car door and deposit computing machine in;
(5) repeat the space Determination of distance that all measured points on gauge points all on the workpiece of location and the mark standard car door are finished in described step (2)-(4);
(6) the standard car door is changed, tested car door is fixed on the position of standard car door, finishes the gauge point on the workpiece of location and the space Determination of distance of the measured point on the tested car door with the same trajectories of the mensuration of a plurality of gauge points of finishing the standard car door and measured point mobile robot successively according to step (2)-(5) then;
(7) whether standard of comparison car door and tested car door and the space distance of locating workpiece meet production requirement to judge tested car door.
The three-dimensional coordinate of the gauge point in the workpiece of location is (x
a, y
a, z
a), the three-dimensional coordinate of standard car door measured point is (x
A, y
A, z
A); The three-dimensional coordinate of the gauge point of location in the workpiece be (x '
a, y '
a, z '
a). the three-dimensional coordinate of tested car door be (x '
A, y '
A, z '
A); Distance between distance between more tested car door and the location workpiece and standard car door and the location workpiece, two distances equate, then meet production requirement.
Claims (1)
1. the detection method of the arrangements for automotive doors of measuring based on robot monocular vision is characterized in that it may further comprise the steps:
(1) the standard car door is positioned in the location workpiece, sets a plurality of measured points at the edge of standard car door and tested car door and on the workpiece inwall of location, set a plurality of gauge points, set up the stereoscopic vision measuring system and demarcate the inside and outside parameter of camera;
(2) computer-controlled robot move to first gauge point near, write down the three dimensional space coordinate of robot of this moment, the image that camera is taken first gauge point solves the three dimensional space coordinate of first gauge point;
(3) computer-controlled robot move to first measured point near, write down the three dimensional space coordinate of robot of this moment, the image that camera is taken first measured point solves the three dimensional space coordinate of first measured point;
(4) by formula calculate the location on the workpiece first gauge point and the space distance of first measured point on the mark standard car door and deposit computing machine in;
(5) repeat the space Determination of distance that all measured points on gauge points all on the workpiece of location and the mark standard car door are finished in described step (2)-(4);
(6) the standard car door is changed, tested car door is fixed on the position of standard car door, finishes the gauge point on the workpiece of location and the space Determination of distance of the measured point on the tested car door with the same trajectories of the mensuration of a plurality of gauge points of finishing the standard car door and measured point mobile robot successively according to step (2)-(5) then;
(7) whether standard of comparison car door and tested car door and the space distance of locating workpiece meet production requirement to judge tested car door.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102866405A CN101968343B (en) | 2010-09-19 | 2010-09-19 | Method for detecting automobile door based on robot monocular vision measurement |
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| CN2010102866405A CN101968343B (en) | 2010-09-19 | 2010-09-19 | Method for detecting automobile door based on robot monocular vision measurement |
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| CN101968343A true CN101968343A (en) | 2011-02-09 |
| CN101968343B CN101968343B (en) | 2012-07-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103438803A (en) * | 2013-09-18 | 2013-12-11 | 苏州晓创光电科技有限公司 | Method for performing view-field-across accurate measurement on size of rectangular part through computer vision technology |
| CN105424012A (en) * | 2015-11-26 | 2016-03-23 | 广州机械科学研究院有限公司 | Robot and machine tool coordinate relation calibration device and method |
| CN105773613A (en) * | 2016-03-30 | 2016-07-20 | 东莞市速美达自动化有限公司 | Horizontal robot camera coordinate system calibration method |
| CN109945782A (en) * | 2019-04-02 | 2019-06-28 | 易思维（杭州）科技有限公司 | Overlength white body key position detection method |
| CN111707207A (en) * | 2020-06-22 | 2020-09-25 | 福州云睿自动化设备有限公司 | High-precision robot three-coordinate electronic gauge rapid measurement system and method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103438803A (en) * | 2013-09-18 | 2013-12-11 | 苏州晓创光电科技有限公司 | Method for performing view-field-across accurate measurement on size of rectangular part through computer vision technology |
| CN103438803B (en) * | 2013-09-18 | 2015-10-28 | 苏州晓创光电科技有限公司 | Computer vision technique accurately measures the method for Rectangular Parts size across visual field |
| CN105424012A (en) * | 2015-11-26 | 2016-03-23 | 广州机械科学研究院有限公司 | Robot and machine tool coordinate relation calibration device and method |
| CN105424012B (en) * | 2015-11-26 | 2017-11-03 | 广州机械科学研究院有限公司 | A kind of robot and the caliberating device and scaling method of machine coordinates relation |
| CN105773613A (en) * | 2016-03-30 | 2016-07-20 | 东莞市速美达自动化有限公司 | Horizontal robot camera coordinate system calibration method |
| CN109945782A (en) * | 2019-04-02 | 2019-06-28 | 易思维（杭州）科技有限公司 | Overlength white body key position detection method |
| CN109945782B (en) * | 2019-04-02 | 2020-12-08 | 易思维（杭州）科技有限公司 | Method for detecting key position of super-long body-in-white |
| CN111707207A (en) * | 2020-06-22 | 2020-09-25 | 福州云睿自动化设备有限公司 | High-precision robot three-coordinate electronic gauge rapid measurement system and method |
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| CN101968343B (en) | 2012-07-04 |
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