CN110285758B - Size detection device for automobile windshield glass and working method thereof - Google Patents
Size detection device for automobile windshield glass and working method thereof Download PDFInfo
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- CN110285758B CN110285758B CN201910686868.4A CN201910686868A CN110285758B CN 110285758 B CN110285758 B CN 110285758B CN 201910686868 A CN201910686868 A CN 201910686868A CN 110285758 B CN110285758 B CN 110285758B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a size detection device of an automobile windshield, which comprises a measuring table for placing the size of a detected windshield, wherein a three-dimensional scanner for scanning the size of the detected windshield is arranged beside the measuring table, and a controller electrically connected with the three-dimensional scanner is arranged beside the three-dimensional scanner; the invention also relates to a working method of the size detection device of the automobile windshield glass. The invention has reasonable structure and simple and convenient operation, can detect the appearance of the windshield glass without a specific detection tool and has high measurement precision.
Description
Technical Field
The invention relates to a size detection device of automobile windshield glass and a working method thereof.
Background
At present, the size and the profile of the formed automobile windshield glass are detected, the molded automobile windshield glass is usually attached to an electronic detection tool which is the same as the required glass profile, electronic probes are arranged at important points on the electronic detection tool, and the electronic probes judge whether the automobile windshield glass is qualified or not through deviation between detection points, but the following problems exist:
1. each type of glass needs a special checking fixture, and the checking fixture has higher cost;
2. the detection tools needed for producing various products are different, and the disassembly and replacement back and forth are complicated;
3. the detection precision is lower.
Disclosure of Invention
In view of this, the invention aims to provide a size detection device for automobile windshield glass and a working method thereof, which have the advantages of reasonable structure, simple and convenient operation, capability of detecting the appearance of the windshield glass, no need of a specific detection tool and high measurement precision.
The technical scheme of the invention is as follows: the utility model provides a size detection device of car windshield, is including being used for putting the measuring station of being surveyed windshield size, is provided with the three-dimensional scanner that is used for scanning to be surveyed windshield size at the measuring station side, is provided with the controller with three-dimensional scanner electric connection at the three-dimensional scanner side.
Furthermore, the scanner comprises a mounting base, and three laser probes are arranged on the mounting base.
Further, the controller includes a data processor and a display screen.
The invention provides another technical scheme that the working method of the size detection device of the automobile windshield glass comprises the following steps: during work, the measured windshield glass is placed on a measuring table, then a three-dimensional scanner is used for aligning the measured windshield glass to scan, the three-dimensional coordinate point cloud of the measured windshield glass is obtained, and the three-dimensional scanner transmits data to a controller; establishing a reference line and a reference plane through a controller, carrying out standardization processing to obtain a processed three-dimensional coordinate point cloud, and obtaining a curved surface through the point cloud; then, a data processor of the controller compares the three-dimensional coordinate point cloud data: (1) the difference value of the z coordinate component values of each point of the glass curved surface and the target glass curved surface is used; (2) the mean square error of the difference of the z coordinate component values of each point on each sectional line; (3) the mean square error of the difference value of the z coordinate component values of all points of the whole curved surface point; whether the glass is qualified or not is judged through the three points, and the glass can pass through the 3 kinds of comparison after being qualified, and a processing result is displayed on a display screen.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the three-dimensional scanner can obtain the three-coordinate point cloud coordinates of the glass profile, the data processor of the controller fits the points into the curved surface, and the difference values of all points between the fitted curved surface and the target curved surface, the mean square error of the difference values of all sectional lines and the mean square error of the difference values of all detection points on the curved surface are compared, so that a user can judge whether the windshield is qualified or not according to the three indexes; the invention has high intelligent degree, has no special requirement on the placing position when the windshield glass is measured, can save a large number of checking tools and electronic detection equipment, obviously saves the cost of the checking tools and improves the measurement precision. The method is particularly suitable for detecting high-grade windshield glass with high requirement on dimensional accuracy.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of an operating state of the embodiment of the present invention;
FIG. 3 is a schematic diagram showing a comparison of differences between points on a section line of a windshield to be tested and a section line of a standard glass according to an embodiment of the present invention;
in the figure: 100-a measuring table; 200-a three-dimensional scanner; 210-a mount; 220-a laser probe; 300-a controller; 310-a data processor; 320-a display screen; 400-glass.
Detailed Description
As shown in fig. 1 to 3, a device for detecting the size of a windshield of an automobile comprises a measuring table 100 for placing a windshield 400 to be measured, a three-dimensional scanner 200 for scanning the windshield 400 to be measured is disposed beside the measuring table 100, and a controller 300 electrically connected to the three-dimensional scanner 200 is disposed beside the three-dimensional scanner 200. During measurement, the three-dimensional scanner 200 can obtain the point cloud coordinates of the three coordinates of the profile of the glass 400, the data processor 310 of the controller 300 fits the points into a curved surface, and the difference between each point of the fitted curved surface and the target curved surface, the mean square error of the difference between each line and the mean square error of the detection points on the curved surface are compared, so that a user can judge whether the windshield 400 is qualified according to the three indexes.
In this embodiment, the scanner includes a mounting base 210, and three laser probes 220 are disposed on the mounting base 210.
In this embodiment, the controller 300 includes a data processor 310 and a display screen 320.
The working method of the detection device of the automobile windshield glass comprises the following steps: during work, the measured windshield 400 is placed on the measuring table 100, then a three-dimensional scanner is used for scanning the measured windshield 400 to obtain the three-dimensional coordinate point cloud of the measured windshield 400, and the three-dimensional scanner transmits data to the controller 300; establishing a reference line and a reference plane through the controller 300, and performing standardization processing; the data processor 310 of the controller 300 then compares the three-dimensional coordinate point cloud data to determine whether the glass is acceptable by the difference between the z-coordinate component values of the points of the glass curved surface and the target glass curved surface, the mean square error of the difference between the z-coordinate component values of the points on the sectional lines, and the mean square error of the difference between the z-coordinate component values of the points of the entire curved surface, and displays the processing result on the display screen 320.
The data processing of the controller 300 includes the following steps:
taking the symmetrical plane of the glass 400, the symmetrical plane and the glass 400 are cut to obtain a curve P0, the curve is a central curve, two ends of the curve are connected to form a straight line, and the straight line is a reference line Y0.
A reference line Y0 and the symmetrical plane are used as a reference surface XY plane, and the XY plane passes through the reference line and is vertical to the central plane; the XY plane of the reference plane remains unchanged throughout the design process.
A standard line perpendicular to the Y axis is made on the reference plane through the origin point by taking the reference line Y0 as the Y axis direction of the XY plane of the reference plane and the midpoint of the reference line Y0 as the origin point, and the direction of the standard line is the X axis direction.
Two end points in the longitudinal direction of the glass 400 are projected onto the reference plane, which are Y-N and YN, respectively, along the X-axis direction (where N is the distance from the selected point to Y0). End points of both sides in the width direction of the glass 400 are projected onto the reference plane, and these two points are X0 and XN (N is a distance from the point to Y0) along the Y-axis direction, respectively.
Respectively drawing two standard lines parallel to the Y axis by passing points Y-N and YN; the passing points X0 and XN are respectively made as two standard lines parallel to the X axis, and these 4 standard lines constitute the boundaries of the projection of the glass 400 on the reference plane.
A standard line Yi parallel to the Y axis is taken every 1mm in Y-N through YN (i is the distance of the line from Y0, the reverse is indicated by a negative sign). A standard line Xj parallel to the X-axis is taken every 1mm in X0 to XN. The intersection of the standard line Xj and the standard line Yi is named Yij point.
And comparing each YIj point with the stored z coordinate component value of the corresponding Pij point on the target glass 400, and if the difference value of the z coordinate component values of one point is greater than a specified value, judging that the glass 400 is unqualified, and sending out an alarm by the controller.
And calculating the mean square error of the z coordinate difference of each point on each Yi, and if the mean square error on one line is larger than a specified value, judging that the glass 400 is unqualified and sending an alarm by the controller.
And calculating the mean square error of the difference values of all the z-coordinate component values of the Yij and the Pij, and if the mean square error of the difference values of all the z-coordinate component values of all the points is greater than a specified value, the automobile windshield 400 is unqualified and the controller gives out an alarm sound.
The above-mentioned operation flow and software and hardware configuration are only used as the preferred embodiment of the present invention, and not to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or directly or indirectly applied to the related art, are included in the scope of the present invention.
Claims (3)
1. The working method of the size detection device of the automobile windshield glass is characterized in that: the device comprises a measuring table for placing the windshield to be measured, a three-dimensional scanner for scanning the size of the windshield to be measured is arranged beside the measuring table, and a controller electrically connected with the three-dimensional scanner is arranged beside the three-dimensional scanner; during work, the measured windshield glass is placed on a measuring table, then a three-dimensional scanner is used for aligning the measured windshield glass to scan, the three-dimensional coordinate point cloud of the measured windshield glass is obtained, and the three-dimensional scanner transmits data to a controller; establishing a reference line and a reference plane through a controller, and carrying out standardization processing;
the controller standardization process comprises the following steps: taking a symmetrical plane of the glass, and cutting the symmetrical plane and the glass to obtain a curve P0, wherein the curve is a central curve, two ends of the curve are connected into a straight line, and the straight line is a reference line Y0; a reference line Y0 and the symmetry plane are used as a reference surface XY plane, and the XY plane passes through the reference line and is vertical to the symmetry plane; in the whole design process, the XY surface of the reference surface is kept unchanged; taking a reference line Y0 as the Y-axis direction of an XY surface of a reference plane, taking the midpoint of the reference line Y0 as an original point, and drawing a standard line perpendicular to the Y axis on the reference plane through the original point, wherein the direction of the standard line is the X-axis direction; projecting two end points in the glass length direction on the reference plane, which are Y-N and YN (where N is the distance from the selected point to Y0) along the X-axis direction, respectively; projecting end points of two sides in the glass width direction on a reference plane, wherein the two points are X0 and XN (N is the distance from the point to Y0) along the Y-axis direction; respectively drawing two standard lines parallel to the Y axis by passing points Y-N and YN; the passing points X0 and XN are respectively used for making two standard lines parallel to the X axis, and the 4 standard lines form the projection boundary of the glass on the reference surface;
then, a data processor of the controller compares the three-dimensional coordinate point cloud data, judges whether the glass is qualified or not according to the difference value of the z coordinate component values of the points of the glass curved surface and the target glass curved surface, the mean square error of the difference value of the z coordinate component values of the points on each sectional line and the mean square error of the difference value of the z coordinate component values of the points of the whole curved surface, and displays the processing result on a display screen;
the specific comparison method is as follows: taking a standard line Yi parallel to the Y axis every 1mm in Y-N to YN (i is the distance of the line to Y0, the reverse is indicated by a negative sign); taking a standard line Xj parallel to the X axis every 1mm from X0 to XN; the intersection point of the standard line Xj and the standard line Yi is named as a Yij point; comparing each YIj point with the stored z coordinate component value of the corresponding Pij point on the target glass, if the difference value of the z coordinate component values of one point is greater than a specified value, judging that the glass is unqualified, and sending out an alarm by a controller; calculating the mean square error of the z coordinate difference of each point on each Yi, and if the mean square error on one line is greater than a specified value, judging that the glass is unqualified, and sending an alarm by a controller; and calculating the mean square error of the difference values of all the z coordinate component values of the Yi j and the Pij, and if the mean square error of the difference values of all the z coordinate component values of all the points is greater than a specified value, the automobile windshield glass is unqualified, and the controller gives out an alarm sound.
2. The operation method of the device for detecting the size of an automobile windshield according to claim 1, wherein: the scanner comprises a mounting seat, and three laser probes are further arranged on the mounting seat.
3. The operation method of the device for detecting the size of an automobile windshield according to claim 1, wherein: the controller includes a data processor and a display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910686868.4A CN110285758B (en) | 2019-07-29 | 2019-07-29 | Size detection device for automobile windshield glass and working method thereof |
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| CN201910686868.4A CN110285758B (en) | 2019-07-29 | 2019-07-29 | Size detection device for automobile windshield glass and working method thereof |
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| CN110285758B true CN110285758B (en) | 2021-11-26 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556529A (en) * | 2018-12-14 | 2019-04-02 | 中铁隧道局集团有限公司 | A kind of tunnel deformation method for monitoring and analyzing based on Grid Projection points cloud processing technology |
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| CN2681085Y (en) * | 2003-07-22 | 2005-02-23 | 烟台麦特电子有限公司 | Apparatus for measuring three dimensional size using laser |
| CN101655355B (en) * | 2009-09-03 | 2010-12-08 | 无锡吉兴汽车部件有限公司 | Test method for molding surface deflection of car sun-roof visor |
| CN103245290A (en) * | 2013-04-15 | 2013-08-14 | 南信大影像技术工程（苏州）有限公司 | Physical dimension detection method for industrial irregularly-shaped components |
| CN108120394A (en) * | 2017-12-20 | 2018-06-05 | 大连交通大学 | The high-speed train curved face quality determining method of flexibility |
| CN108682012B (en) * | 2018-05-15 | 2021-07-27 | 佛山市南海区广工大数控装备协同创新研究院 | 3D curved surface glass surface flatness defect detection method based on line scanning laser |
| CN108871233A (en) * | 2018-07-31 | 2018-11-23 | 苏州天准科技股份有限公司 | A kind of bend glass contour degree detection device and detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109556529A (en) * | 2018-12-14 | 2019-04-02 | 中铁隧道局集团有限公司 | A kind of tunnel deformation method for monitoring and analyzing based on Grid Projection points cloud processing technology |
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