CN104406540A - Calibration system for automobile morphology detection structured light based on distance constraint from point to original point - Google Patents
Calibration system for automobile morphology detection structured light based on distance constraint from point to original point Download PDFInfo
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- CN104406540A CN104406540A CN201410723555.9A CN201410723555A CN104406540A CN 104406540 A CN104406540 A CN 104406540A CN 201410723555 A CN201410723555 A CN 201410723555A CN 104406540 A CN104406540 A CN 104406540A
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Abstract
The invention discloses a calibration system for automobile morphology detection structured light based on distance constraint from a point to an original point and aims to solve the problem that a laser plane equation under a world coordinate system cannot be directly obtained by the existing method at present. A camera calibrating target for an automobile vision inspection system based on spherical coordinates mainly comprises a three-dimensional calibrating plate (1) and a calibrating rod (2). The provided calibration system for the automobile morphology detection structured light based on distance constraint from the point to the original point has the advantages of simple structure, high detection precision, small accumulated error, complete functions, high simplicity and convenience for operation, easiness for mounting, high generality, lower cost and reliable performance; the non-contact detection requirement on an automobile body in the detection industry can be met.
Description
Technical field
The present invention relates to a kind of calibration facility of checkout equipment of auto industry field, in particular, it relates to a kind of based on the calibration system of point to the automobile pattern detection architecture light of initial point distance restraint.
Background technology
For ensureing the safety traffic of automobile, rationally detect overload and oversize and the size repacking of automobile fast, the vision measurement carrying out every geometric angle of automobile is one of main test item of automobile detection field.At present, mainly rest on the measurement of manual meter ruler to the measurement of automobile dimension and angle, efficiency is low, low precision, and intensity of workers is large.Adopt machine vision metrology technology to carry out non-contact detecting to automobile geometric parameter to be expected to solve above technical bottleneck owing to having the features such as quick, accurate and high reliability.Because three-dimensional scaling thing can to determine the transition matrix of video camera phase areal coordinate and three dimensional space coordinate by a photos, therefore Fast Calibration can be realized; The stated accuracy of three-dimensional scaling thing is higher than two-dimensional calibrations thing simultaneously.But existing three-dimensional scaling thing cannot directly be demarcated the laser plane of automobile Shap feature detection system.The present invention adopts three-dimensional scaling plate and demarcates the decomposable asymmetric choice net structure of bar combination, achieve the demarcation of detection system structured light under world coordinate system, system architecture is simple, be convenient to processing and transport, directly can obtain the Spatial General 6 R position equation of detection system structured light plane under world coordinate system, improve the accuracy of automobile pattern testing result, significant to the technical progress of auto industry detection field.
Summary of the invention
The present invention is directed to the problem that current existing scaling method directly cannot obtain laser plane equation under world coordinate system, provide a kind of can directly obtain optical plane position equation under world coordinate system, structure is simple, stated accuracy is high, cumulative errors is little, function is complete, easy and simple to handle, be easy to that installation, highly versatile, cost are lower, the met automotive check industry of dependable performance to automobile pattern carry out vision-based detection requirement based on the calibration system of point to the automobile pattern detection architecture light of initial point distance restraint.
Consult Fig. 1 to Fig. 2, for solving the problems of the technologies described above, the present invention adopts following technical scheme to be achieved.Calibration system based on putting the automobile pattern detection architecture light of initial point distance restraint provided by the present invention includes three-dimensional scaling plate and demarcates bar.
The summit, end of circular cone demarcating bar overlaps with the common intersection of three pieces of rectangular steel plates of three-dimensional scaling plate.
Three-dimensional scaling plate described in technical scheme is formed by three pieces of mutual vertical weldings of rectangular steel plates, and the inner surface of three-dimensional scaling plate pastes chessboard grid pattern.
Demarcation bar described in technical scheme is processed into by standard rod iron, and taper shape is processed in the one end demarcating bar, and the other end demarcating bar is plane, plane is pasted chessboard grid pattern.
The invention has the beneficial effects as follows:
(1) the present invention is directed to the problem that current existing scaling method directly cannot obtain laser plane equation under world coordinate system, devise the demarcation bar of end with taper, utilize the summit of circular cone to achieve and demarcate overlapping of bar and three-dimensional scaling plate world coordinate system initial point, chessboard grid pattern is pasted as laser plane and the mark demarcating bar intersection point at the other end demarcating bar, plane one end of such demarcation bar is the length of demarcating bar to the spacing of the initial point of world coordinate system, the constraint utilizing different demarcation boom ends and optical plane joining distance to equal bar long can be set up optimal objective equation and then be realized the object of direct Calibration of Laser plane equation under world coordinate system, due to the conversion without the need to entering coordinate system, higher stated accuracy can be obtained.
(2) critical part of the present invention adopts etalon steel to process, and first, standard steel section output is large, and machining operation is few, and make simple, production cost is lower; Secondly, as the important accessory of surveying instrument, adopt standard steel section to have certain intensity, can be indeformable in Long-Time Service, ensure the precision measured, the requirement of national standard to measuring accuracy can be met.
Accompanying drawing explanation
Fig. 1 is based on the axonometric drawing of point to the calibration system of the automobile pattern detection architecture light of initial point distance restraint;
Fig. 2 is based on the axonometric drawing of point to the demarcation bar 2 of the calibration system of the automobile pattern detection architecture light of initial point distance restraint;
In figure: 1. three-dimensional scaling plate, 2. demarcate bar.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Consult Fig. 1 to Fig. 2, include three-dimensional scaling plate 1 based on the calibration system of point to the automobile pattern detection architecture light of initial point distance restraint and demarcate bar 2.
Three-dimensional scaling plate 1 is formed by three pieces of mutual vertical weldings of rectangular steel plates, and the inner surface of three-dimensional scaling plate 1 pastes chessboard grid pattern.
Demarcate bar 2 to be processed into by standard rod iron, taper shape is processed in the one end demarcating bar 2, and the summit, end of circular cone overlaps with the common intersection of three pieces of rectangular steel plates of three-dimensional scaling plate 1, and the other end demarcating bar 2 is plane, plane is pasted chessboard grid pattern.
Based on the using method of point to the calibration system of the automobile pattern detection architecture light of initial point distance restraint: by the fixed position be placed on based on the calibration system putting the automobile pattern detection architecture light of initial point distance restraint within the scope of the camera field of view of automobile Shap feature detection system, start video camera and laser level, the conical end of demarcation bar is made to fix a point to overlap with the initial point of three-dimensional scaling plate, the unique point of demarcating the gridiron pattern pattern of the bar other end passes through optical plane, by camera acquisition image, again demarcation bar is moved to the another location of unique point by optical plane of gridiron pattern pattern, again by camera acquisition image, after gathering multiple image, setting up unique point to the equidistant constraint of initial point solves, complete based on the demarcation of point to the automobile pattern detection architecture optic plane equations of initial point distance restraint.
Claims (3)
1. one kind is arrived the calibration system of the automobile pattern detection architecture light of initial point distance restraint based on point, it is characterized in that, described is made up of three-dimensional scaling plate (1) and demarcation bar (2) based on the calibration system of point to the automobile pattern detection architecture light of initial point distance restraint;
The summit, end demarcating the circular cone of bar (2) overlaps with the common intersection of three pieces of rectangular steel plates of three-dimensional scaling plate (1).
2. according to the calibration system arriving the automobile pattern detection architecture light of initial point distance restraint based on point according to claim 1, it is characterized in that described three-dimensional scaling plate (1) is formed by three pieces of mutual vertical weldings of rectangular steel plates, the inner surface of three-dimensional scaling plate (1) pastes chessboard grid pattern.
3. according to the calibration system arriving the automobile pattern detection architecture light of initial point distance restraint based on point according to claim 1, it is characterized in that described demarcation bar (2) is processed into by standard rod iron, taper shape is processed in the one end demarcating bar (2), the other end demarcating bar (2) is plane, plane is pasted chessboard grid pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410723555.9A CN104406540B (en) | 2014-12-02 | 2014-12-02 | Calibration system based on point to the automobile Shape measure structure light of initial point distance constraint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410723555.9A CN104406540B (en) | 2014-12-02 | 2014-12-02 | Calibration system based on point to the automobile Shape measure structure light of initial point distance constraint |
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| Publication Number | Publication Date |
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| CN104406540A true CN104406540A (en) | 2015-03-11 |
| CN104406540B CN104406540B (en) | 2017-03-29 |
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| CN201410723555.9A Expired - Fee Related CN104406540B (en) | 2014-12-02 | 2014-12-02 | Calibration system based on point to the automobile Shape measure structure light of initial point distance constraint |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627093A (en) * | 2018-06-20 | 2018-10-09 | 上汽大众汽车有限公司 | Supplemental measurement tool, system and method for screw thread hole site optical measuring method |
| CN112396660A (en) * | 2019-08-12 | 2021-02-23 | 华为技术有限公司 | Method and system for determining optical center of camera |
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| CN103759669A (en) * | 2014-01-03 | 2014-04-30 | 河南科技大学 | Monocular vision measuring method for large parts |
| CN104101300A (en) * | 2014-08-05 | 2014-10-15 | 吉林大学 | Surface structured light active vision based automobile body three-dimensional reconstruction calibration system |
| JP2014215719A (en) * | 2013-04-23 | 2014-11-17 | 株式会社東芝 | Vehicle model determination device |
| CN204188141U (en) * | 2014-12-02 | 2015-03-04 | 吉林大学 | Based on the calibration system of point to the automobile pattern detection architecture light of initial point distance restraint |
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2014
- 2014-12-02 CN CN201410723555.9A patent/CN104406540B/en not_active Expired - Fee Related
Patent Citations (4)
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| JP2014215719A (en) * | 2013-04-23 | 2014-11-17 | 株式会社東芝 | Vehicle model determination device |
| CN103759669A (en) * | 2014-01-03 | 2014-04-30 | 河南科技大学 | Monocular vision measuring method for large parts |
| CN104101300A (en) * | 2014-08-05 | 2014-10-15 | 吉林大学 | Surface structured light active vision based automobile body three-dimensional reconstruction calibration system |
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Non-Patent Citations (1)
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| 徐观: "汽车车轮定位参数视觉检测系统及检定方法的研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627093A (en) * | 2018-06-20 | 2018-10-09 | 上汽大众汽车有限公司 | Supplemental measurement tool, system and method for screw thread hole site optical measuring method |
| CN112396660A (en) * | 2019-08-12 | 2021-02-23 | 华为技术有限公司 | Method and system for determining optical center of camera |
| CN112396660B (en) * | 2019-08-12 | 2024-01-09 | 华为云计算技术有限公司 | Method and system for determining optical center of camera |
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| CN104406540B (en) | 2017-03-29 |
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