CN107167088A - The measuring method and device of glass deformation amount - Google Patents
The measuring method and device of glass deformation amount Download PDFInfo
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- CN107167088A CN107167088A CN201710337656.6A CN201710337656A CN107167088A CN 107167088 A CN107167088 A CN 107167088A CN 201710337656 A CN201710337656 A CN 201710337656A CN 107167088 A CN107167088 A CN 107167088A
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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
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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Abstract
The embodiment of the invention discloses a kind of measuring method of glass deformation amount and device, domain of definition is used as using the linear equation at the edge of the glass to be measured, the surface equation of the glass to be measured is fitted to the world coordinates of several test points again, surface equation progress is obtained to the world coordinates of several discrete points on the glass to be measured after discrete again, the maximum of z coordinate in all discrete points is subtracted into minimum value can obtain the deflection of the glass to be measured, solve the problem of prior art can not measure large-size glass deflection, accuracy is high, and science is reliable.
Description
Technical field
The present invention relates to the measuring method and device of glass detection field, more particularly to a kind of glass deformation amount.
Background technology
In recent years, with the high speed development of the large scale interactive display device such as vertical type display screen, touch one-piece machine, promote
The fast development of the large scale tempering glass industry of screen surface.The effect of safety glass is to protect the screen of electronic equipment
Curtain, but the safety glass on large scale interactive display device can cause to bend and deform due to conducting oneself with dignity, its lordosis or indent meeting
Infrared touch failure, or screen is caused colored Newton's ring occur.Therefore, must be to tempering glass before safety glass is fitted with screen
Glass carries out the detection of deflection, to ensure that product quality meets the requirement of follow-up attaching process.
Prior art most is based on three to the measurement of the detection method of glass deformation amount primarily directed to small size glass
Put after measuring using maximum difference as deflection, the deformation accuracy of measurement that this method is obtained is low, is not suitable for large scale glass
Glass.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of measuring method of glass deformation amount, can effectively measure large-size glass
Deflection, precision is high, reliable results.
To achieve the above object, the invention provides a kind of measuring method of glass deformation amount, including step：
Extract the edge of glass to be measured, and by the edge transition of the glass to be measured into world coordinate system linear equation L
(x, y)；Wherein, reference axis X, Y and Z that the world coordinate system is mutually perpendicular to and intersected by three are constituted；
The surface of the glass to be measured is obtained to each described sharp by the airborne laser range finders of several known location coordinates
The distance of ligh-ranging device, so that the world for obtaining each test point relative with the airborne laser range finder on the glass to be measured is sat
Mark；Wherein, each airborne laser range finder is respectively positioned in z=a plane, and the plane where the airborne laser range finder is with being used for
The clamping jig of the fixed glass to be measured is parallel；The clamping jig is located at z=0 plane, and a ≠ 0；
Using the linear equation of the world coordinates as domain of definition, obtained after being fitted to the world coordinates of the test point
Obtain the surface equation of the glass to be measured；
The discrete rear world coordinates for obtaining several discrete points on the glass to be measured is carried out to the surface equation；
The maximum and minimum value of z coordinate in all discrete points are obtained, by the maximum and minimum value of the z coordinate
Difference as the glass to be measured deflection.
Compared with prior art, edge of the measuring method of glass deformation amount disclosed by the invention based on the glass to be measured
Linear equation, then be fitted the surface equation of the glass to be measured to the world coordinates of several test points, then by the curved surface
The world coordinates of several discrete points on the glass to be measured is obtained after equation progress is discrete, z in all discrete points is sat
Target maximum, which subtracts minimum value, can obtain the deflection of the glass to be measured, and large scale can not be measured by solving prior art
The problem of glass deformation amount, accuracy is high, and science is reliable.
As the improvement of such scheme, the surface equation of the glass to be measured is nurbs surface equation, and to the curved surface
The world coordinates of several discrete points is specially on the acquisition glass to be measured after equation progress is discrete：
By default step-length to the nurbs surface equation carry out it is discrete after obtain a series of nurbs curve equations, then
If being obtained after each nurbs curve equation is carried out into discrete and mapping by the default step-length on the glass to be measured
The world coordinates of dry discrete point.Nurbs surface is fitted, is more convenient flexibly, smoothness is higher, is conducive to the analysis to curved surface.
As the improvement of such scheme, the airborne laser range finder is evenly distributed on a flat board, the flat board and the use
It is parallel to each other placement in the clamping jig of fixed glass to be measured.Clamping jig and flat board is set to be parallel to each other, i.e., described laser ranging
The datum plane of plane and the glass to be measured where device is parallel to each other, it is ensured that the accuracy of result.
As the improvement of such scheme, each nurbs curve equation is carried out by curve interpolating method discrete.Adopt
The progress of sample curve interpolating method is discrete, can control to bend high error, meet the requirement of precision.
As the improvement of such scheme, the edge for extracting glass to be measured is specially：
The lamp box for the side for being fixed on the glass to be measured is opened, makes to show black border line on the glass to be measured；
The glass to be measured with black border line is obtained by the camera for the opposite side for being fixed on the glass to be measured
The picture of glass, the edge of the glass to be measured is extracted by the picture；Wherein, the lens axis of the camera is treated with described
The longitudinal cross-section for surveying glass is parallel.The lamp box is placed in the side of the glass to be measured, and the glass to be measured can be enable clearly to show
Existing black border line, is conducive to the extraction at the edge of the glass to be measured, improves the degree of accuracy of result.
As the improvement of such scheme, obtained after being fitted by least square method to the world coordinates of the test point
The surface equation of the glass to be measured.Least square method is the method that surface fitting is commonly used, and science is reliable.
The embodiment of the present invention additionally provides a kind of measurement apparatus of glass deformation amount, including：
Edge extracting module, the edge for extracting glass to be measured, and the glass edge is converted into world coordinate system
Linear equation L (x, y)；Wherein, reference axis X, Y and Z that the world coordinate system is mutually perpendicular to and intersected by three are constituted；
Test point coordinate obtaining module, obtains described to be measured for the airborne laser range finder by several known location coordinates
The surface of glass to each airborne laser range finder distance so that obtain on the glass to be measured with the airborne laser range finder phase
To each test point world coordinates；Wherein, each airborne laser range finder is in z=a plane, the laser ranging
Plane where device is parallel with the clamping jig for fixing the glass to be measured；The clamping jig is located at z=0 plane,
And a ≠ 0；
Surface equation fitting module, for using the linear equation of the world coordinates as domain of definition, to the test point
World coordinates be fitted after obtain the surface equation of the glass to be measured；
Discrete block, for carrying out several discrete points on the discrete rear acquisition glass to be measured to the surface equation
World coordinates；
Deflection detection module, maximum and minimum value for obtaining z coordinate in all discrete points, by the z
The maximum of coordinate and the difference of minimum value as the glass to be measured deflection.
Compared with prior art, the measurement apparatus of glass deformation amount disclosed by the invention obtains institute according to edge extracting module
The linear equation at the edge of glass to be measured is stated, then the airborne laser range finder is obtained by test point coordinate obtaining module and is treated with described
The distance of glass is surveyed, so that the world coordinates of the multiple test points of correspondence is obtained, then by surface equation fitting module with to be measured
The linear equation at the edge of glass as domain of definition, obtained after being fitted to the world coordinates of the multiple test point described in treat
The surface equation of glass is surveyed, the surface equation is subjected to the discrete rear multiple discrete points for obtaining glass to be measured, will be the multiple
The coordinate of discrete point is compared, and maximum coordinate value among corresponding with the distance of the airborne laser range finder to the glass to be measured is subtracted
Min coordinates value is gone to obtain the deflection of the glass to be measured, large-size glass deformation can not be measured by solving prior art
The problem of amount, accuracy is high, and science is reliable.
As the improvement of such scheme, obtained after being fitted by least square method to the world coordinates of the test point
The surface equation of the glass to be measured.
As the improvement of such scheme, the glass to be measured is fixed by the first flat board, and the airborne laser range finder uniformly divides
Cloth is on the second flat board, and first flat board and the second flat board are parallel to each other placement.
As the improvement of such scheme, the edge extracting module, which is further used for opening, is fixed on the glass to be measured
The lamp box of side, makes to show black border line on the glass to be measured；Taken the photograph by the opposite side for being fixed on the glass to be measured
As head obtains the picture of the glass to be measured with black border line, the side of the glass to be measured is extracted by the picture
Edge；Wherein, the lens axis of the camera is parallel with the longitudinal cross-section of the glass to be measured.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of the measuring method of glass deformation amount in the embodiment of the present invention 1.
Fig. 2 is a kind of schematic flow sheet of the measuring method of glass deformation amount in the embodiment of the present invention 2.
Fig. 3 is the structural representation of the equipment of measurement glass deformation amount in the embodiment of the present invention 2.
Fig. 4 is the schematic diagram at the edge of glass to be measured in the embodiment of the present invention 2.
Fig. 5 is the schematic diagram of the test point of glass to be measured in the embodiment of the present invention 2.
Fig. 6 is the schematic diagram for the curved surface that obtained glass to be measured is fitted in the embodiment of the present invention 2.
Fig. 7 is a kind of schematic flow sheet of the measuring method of glass deformation amount in the embodiment of the present invention 3.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It is a kind of schematic flow sheet of the measuring method for glass deformation amount that the embodiment of the present invention 1 is provided referring to Fig. 1.Such as
The measuring method of glass deformation amount shown in Fig. 1 includes step：
S11, the edge for extracting glass to be measured, and by the edge transition of the glass to be measured into the straight line side of world coordinate system
Journey L (x, y)；Wherein, reference axis X, Y and Z that the world coordinate system is mutually perpendicular to and intersected by three are constituted；
S12, the surface of the glass to be measured is obtained by the airborne laser range finders of several known location coordinates to each institute
The distance of airborne laser range finder is stated, so as to obtain the generation of each test point relative with the airborne laser range finder on the glass to be measured
Boundary's coordinate；Wherein, each airborne laser range finder is respectively positioned in z=a plane, plane and use where the airborne laser range finder
It is parallel in the clamping jig of the fixed glass to be measured；The clamping jig is located at z=0 plane, and a ≠ 0；
S13, using the linear equation of the world coordinates as domain of definition, the world coordinates of the test point is fitted
The surface equation of the glass to be measured is obtained afterwards；
S14, the world coordinates that several discrete points on the discrete rear acquisition glass to be measured are carried out to the surface equation；
S15, the maximum and minimum value for obtaining z coordinate in all discrete points, by the maximum of the z coordinate and most
The difference of small value as the glass to be measured deflection.
When it is implemented, all devices are respectively positioned in a world coordinate system, the world coordinate system is Descartes's right hand
Coordinate system, reference axis X, Y and Z for being mutually perpendicular to and being intersected by three is constituted；First extract the edge of glass to be measured, obtain described in treat
Survey the linear equation L (x, y) at the edge of glass.Airborne laser range finder based on known location coordinate obtains the table of the glass to be measured
Face to each airborne laser range finder distance, using the X of each laser side range finder, Y-coordinate as stating on glass to be measured
The X of each test point relative with the airborne laser range finder, Y-coordinate, according to each airborne laser range finder to the glass to be measured
The distance on the surface of glass generates the Z coordinate of each test point relative with the airborne laser range finder on the glass to be measured, that is, treats
The world coordinates for surveying several test points on glass is P0 (x, y, z)~Pn (x, y, z).Using L (x, y) as domain of definition, to P0
(x, y, z)~P15 (x, y, z) is fitted, and obtains the surface equation of the glass to be measured, and this equation is glass in world coordinates
Surface equation in system.By the surface equation with certain rule carry out it is discrete after obtain some row discrete points P (x, y, z),
The maximum of the z coordinate of whole discrete points is subtracted into minimum value can obtain the deflection of the glass to be measured.According to different
Modeling pattern can obtain different surface equations, and wherein least square method is to carry out the conventional method of surface fitting with discrete point.
Least square method is that the quadratic sum of the error of fitting function reaches the minimum method that fitting surface is constructed as standard.By treating
The coordinate for surveying the series of points of glass builds surface equation, and the surface equation carried out discrete to obtain multiple discrete points
Coordinate, the reference point of the deflection of detection glass to be measured is used as using these discrete points, it is to avoid the measurement of a wide range of point, is saved
Amount of calculation, and improve precision, the shortcoming of large-size glass deflection can not be measured by overcoming prior art, applicable glass
Size range is wide, practical.
It is a kind of schematic flow sheet of the measuring method for glass deformation amount that the embodiment of the present invention 2 is provided referring to Fig. 2.Such as
The measuring method of glass deformation amount shown in Fig. 2 includes step：
S21, opening are fixed on the lamp box of the side of the glass to be measured, make to show black border on the glass to be measured
Line；
S22, the camera of opposite side by being fixed on the glass to be measured are obtained with being treated described in the line of black border
The picture of glass is surveyed, the edge of the glass to be measured is extracted by the picture；Wherein, the lens axis of the camera and institute
The longitudinal cross-section for stating glass to be measured is parallel；
S23, by the edge transition of the glass to be measured into world coordinate system linear equation L (x, y)；Wherein, the generation
Reference axis X, Y and Z that boundary's coordinate system is mutually perpendicular to and intersected by three are constituted；
S24, the surface of the glass to be measured is obtained by the airborne laser range finders of several known location coordinates to each institute
The distance of airborne laser range finder is stated, so as to obtain the generation of each test point relative with the airborne laser range finder on the glass to be measured
Boundary's coordinate；Wherein, each airborne laser range finder is respectively positioned in z=a plane, plane and use where the airborne laser range finder
It is parallel in the clamping jig of the fixed glass to be measured；The clamping jig is located at z=0 plane, and a ≠ 0；
S25, using the linear equation of the world coordinates as domain of definition, the world coordinates of the test point is fitted
The nurbs surface equation of the glass to be measured is obtained afterwards；
S26, to by default step-length to the nurbs surface equation carry out it is discrete after obtain a series of nurbs curves
Equation, then obtain described to be measured after each nurbs curve equation is carried out into discrete and mapping by the default step-length
The world coordinates of several discrete points on glass；
S27, the maximum and minimum value for obtaining z coordinate in all discrete points, by the maximum of the z coordinate and most
The difference of small value as the glass to be measured deflection.
With reference to Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the working process and principle to the present embodiment are specifically described.This implementation
The matrix that example is constituted with 3X5 airborne laser range finder is illustrated, and the measuring method of glass deformation amount proposed by the invention is not
It is limited to the matrix of 3X5 airborne laser range finder.When it is implemented, first each equipment is installed and position correction, specifically,
As shown in figure 3, the glass to be measured is fixed on support vertically, the airborne laser range finder is uniformly arranged at grade, and
Plane residing for the airborne laser range finder is parallel with the clamping jig for fixing the glass to be measured.The camera and laser
Range finder is located at the same side of the glass to be measured, and lamp box is located at the opposite side of the glass to be measured, and the mirror of the camera
Head axis is parallel with the longitudinal cross-section of the airborne laser range finder.After position and placement angle to each equipment are corrected, build
A vertical world coordinate system, using the plane residing for airborne laser range finder as z=a plane, X is used as using the axis where horizontal direction
Axle, using the axis where vertical direction as Y-axis, Z axis is used as using the direction of the airborne laser range finder to the glass to be measured
Positive direction, the conversion of world coordinates is carried out based on each airborne laser range finder.Lamp box is opened, makes to show on the glass to be measured
Black border line；The picture for obtaining the glass to be measured with black border line is shot by camera, as shown in figure 4, will be described
Picture extracts the edge of the glass to be measured and generates the linear equation L (x, y) at edge after being analyzed and processed；Close lamp box,
Each airborne laser range finder is obtained to the distance on the surface of the glass to be measured by airborne laser range finder, generated after being changed described
The world coordinates P0 (x, y, z) of each test point relative with the airborne laser range finder~P14 (x, y, z) on glass to be measured, respectively
The position of individual test point is as shown in Figure 5；Using the linear equation L (x, y) at edge as domain of definition, to P0 (x, y, z)~P14 (x,
Y, z) the nurbs surface equation S (u, v) of the glass to be measured is generated after fitting, the curved surface of gained is as shown in fig. 6, again by NURBS
Surface equation S (u, v) discrete is series of points, is specially first with default step-length that nurbs surface is discrete for the v ginsengs such as a series of
Number nurbs curve equation C (u), then with same step-length respectively will it is each it is described wait v parameters nurbs curves carry out it is discrete with
Multiple discrete point P (x, y, z) on the glass to be measured are obtained after mapping processing.The z coordinate of whole discrete points is compared,
The maximum of z coordinate in whole discrete points is subtracted into minimum value can obtain the deflection of the glass to be measured.NURBS is Non-
Uniform Rational B-Splines abbreviation, i.e. non-homogeneous B spline curve, round and smooth song can be built using NURBS
Face, fireballing characteristic stable with calculating.
Preferably, each nurbs curve is carried out using curve interpolating method discrete.Interpolation Process is exactly interpolated point
Densification.A kind of mode therein is, in a cycle, and the single order and second order for obtaining nurbs curve lead vector, and root
According to the step-length of determination, current parameter value u is utilizediThe parameter value u in next cycle is calculated in real timei+1, then obtain interpolation on curve
Point C (ui+1), then the coordinate that the interpolated point on curved surface is mapped back into glass to be measured can obtain discrete point P (x, y, z).Another interpolation side
Method obtains the vector of the corresponding node of discrete point, you can try to achieve interpolation on curve for curve is divided into N sections according to default step-length
Point C (ui+1).Using etc. arc length nurbs curve discrete logarithm, it is ensured that the dividing precision and curve approximate error of curve.
Preferably, when glass size is 1500mmX800mm, in order to ensure the precision of the deflection measured, step can be set
A length of 1mm.
Preferably, the airborne laser range finder is evenly distributed on the first flat board, the flat board and for fixing glass to be measured
Clamping jig be parallel to each other placement, can ensure that the plane residing for the airborne laser range finder is treated with described using this fixed form
The datum plane for surveying glass is parallel, it is ensured that the accuracy of result.
As shown in fig. 7, the present invention, which is also corresponded to, provides a kind of measurement apparatus 100 of glass deformation amount, including：
Edge extracting module 101, the edge for extracting glass to be measured, and the glass edge is converted into world coordinates
The linear equation L (x, y) of system；Wherein, reference axis X, Y and Z that the world coordinate system is mutually perpendicular to and intersected by three are constituted；
Test point coordinate obtaining module 102, obtains described for the airborne laser range finder by several known location coordinates
The surface of glass to be measured to each airborne laser range finder distance so that obtain on the glass to be measured with the laser ranging
The world coordinates of each relative test point of device；Wherein, each airborne laser range finder is in z=a plane, the laser
Plane where range finder is parallel with the clamping jig for fixing the glass to be measured；The clamping jig is located at the flat of z=0
Face, and a ≠ 0；
Surface equation fitting module 103, for using the linear equation of the world coordinates as domain of definition, to the detection
The world coordinates of point obtains the surface equation of the glass to be measured after being fitted；
Discrete block 104, for the surface equation is carried out it is discrete after to obtain on the glass to be measured several discrete
The world coordinates of point；
Deflection detection module 105, maximum and minimum value for obtaining z coordinate in all discrete points, by institute
The maximum of z coordinate and the difference of minimum value are stated as the deflection of the glass to be measured.
Extract the edge of the glass to be measured when it is implemented, first passing through edge extracting module 101 and change into world's seat
The linear equation of system is marked, airborne laser range finder and the institute of known location coordinate are then obtained by test point coordinate obtaining module 102
The distance of glass to be measured is stated, so as to obtain the world coordinates of the multiple test points of correspondence, then passes through surface equation fitting module 103
Using the linear equation at the edge of glass to be measured as domain of definition, obtained after being fitted to the world coordinates of the multiple test point
The surface equation of the glass to be measured, then, discrete rear acquisition glass to be measured is carried out by discrete block 104 by the surface equation
Multiple discrete points of glass, the coordinate of the multiple discrete point is compared, will be with the airborne laser range finder to the glass to be measured
The corresponding maximum coordinate value among of distance of glass, which subtracts min coordinates value, can obtain the deflection of the glass to be measured, and this programme is with
Know the series of discrete point fitting surface equation of coordinate, then the seat of another serial variance point is obtained after handling surface equation
Mark, it is adaptable to the detection of the deflection of various sizes of glass, accuracy is high, and large scale glass can not be measured by solving prior art
The problem of glass deflection.
In implementation process, using least square method come fit curve equation, technology is more ripe, and the curved surface of acquisition is also more
Close to the surface state of actual glass.
Preferably, in order to ensure that the plane residing for the airborne laser range finder is parallel with the glass to be measured, it can be treated described
Survey glass to fix by the first flat board, the airborne laser range finder is evenly distributed on the second flat board, first flat board and second
Flat board is parallel to each other placement.
Preferably, the detailed process that the edge extracting module 101 extracts the edge of the glass to be measured is：
The lamp box for the side for being fixed on the glass to be measured is opened, makes to show black border line on the glass to be measured；It is logical
The camera for crossing the opposite side for being fixed on the glass to be measured obtains the picture of the glass to be measured with black border line, leads to
Cross the edge that the picture extracts the glass to be measured；Wherein, the lens axis of the camera and the glass to be measured is vertical
It is parallel to section.Uniform light is sent by lamp box, the glass to be measured can be formed under the irradiation of planar light source at its edge
The lines of black.Glass image with black border line is obtained by camera, then after being analyzed and processed to glass image
Obtain the linear equation at the edge of the glass to be measured.
To sum up, the embodiment of the invention discloses a kind of measuring method of glass deformation amount and device, with the glass to be measured
Edge linear equation as domain of definition, then the curved surface side of the glass to be measured is fitted to the world coordinates of several test points
Journey, then by the surface equation carry out it is discrete after obtain the world coordinates of several discrete points on the glass to be measured, will be all
The maximum of z coordinate, which subtracts minimum value, in the discrete point can obtain the deflection of the glass to be measured, solve existing skill
The problem of art can not measure large-size glass deflection, accuracy is high, and science is reliable.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of measuring method of glass deformation amount, it is characterised in that including step：
Extract the edge of glass to be measured, and by the edge transition of the glass to be measured into world coordinate system linear equation L (x,
y)；Wherein, reference axis X, Y and Z that the world coordinate system is mutually perpendicular to and intersected by three are constituted；
The surface of the glass to be measured is obtained to each Laser Measuring by the airborne laser range finders of several known location coordinates
Distance away from device, so as to obtain the world coordinates of each test point relative with the airborne laser range finder on the glass to be measured；
Wherein, each airborne laser range finder is respectively positioned in z=a plane, and the plane where the airborne laser range finder is fixed with being used for
The clamping jig of the glass to be measured is parallel；The clamping jig is located at z=0 plane, and a ≠ 0；
Using the linear equation of the world coordinates as domain of definition, institute is obtained after being fitted to the world coordinates of the test point
State the surface equation of glass to be measured；
The discrete rear world coordinates for obtaining several discrete points on the glass to be measured is carried out to the surface equation；
The maximum and minimum value of z coordinate in all discrete points are obtained, by the maximum of the z coordinate and the difference of minimum value
It is worth the deflection as the glass to be measured.
2. the measuring method of glass deformation amount as claimed in claim 1, it is characterised in that the surface equation of the glass to be measured
For nurbs surface equation, and the surface equation is carried out it is discrete after obtain the generation of several discrete points on the glass to be measured
Boundary's coordinate is specially：
By default step-length the nurbs surface equation is carried out it is discrete after obtain a series of nurbs curve equations, then pass through
Each nurbs curve equation obtained after discrete and mapping on the glass to be measured several by the default step-length
The world coordinates of discrete point.
3. the measuring method of glass deformation amount as claimed in claim 1, it is characterised in that
The airborne laser range finder is evenly distributed on a flat board, the flat board and the clamping jig for being used to fix glass to be measured
Be parallel to each other placement.
4. the measuring method of glass deformation amount as claimed in claim 2, it is characterised in that will be each by curve interpolating method
The nurbs curve equation carries out discrete.
5. the measuring method of glass deformation amount as claimed in claim 1, it is characterised in that the edge for extracting glass to be measured is specific
For：
The lamp box for the side for being fixed on the glass to be measured is opened, makes to show black border line on the glass to be measured；
The glass to be measured with black border line is obtained by the camera for the opposite side for being fixed on the glass to be measured
Picture, the edge of the glass to be measured is extracted by the picture；Wherein, the lens axis of the camera and the glass to be measured
The longitudinal cross-section of glass is parallel.
6. the measuring method of glass deformation amount as claimed in claim 1, it is characterised in that by least square method to the inspection
The world coordinates of measuring point obtains the surface equation of the glass to be measured after being fitted.
7. a kind of measurement apparatus of glass deformation amount, it is characterised in that including：
Edge extracting module, the edge for extracting glass to be measured, and the glass edge is converted into the straight of world coordinate system
Line equation L (x, y)；Wherein, reference axis X, Y and Z that the world coordinate system is mutually perpendicular to and intersected by three are constituted；
Test point coordinate obtaining module, for obtaining the glass to be measured by the airborne laser range finder of several known location coordinates
Surface to each airborne laser range finder distance, so as to obtain relative with the airborne laser range finder on the glass to be measured
The world coordinates of each test point；Wherein, each airborne laser range finder is in z=a plane, the airborne laser range finder institute
Plane with for fix the glass to be measured clamping jig it is parallel；The clamping jig is located at z=0 plane, and a ≠
0；
Surface equation fitting module, for using the linear equation of the world coordinates as domain of definition, to the generation of the test point
Boundary's coordinate obtains the surface equation of the glass to be measured after being fitted；
Discrete block, for carrying out the discrete rear world for obtaining several discrete points on the glass to be measured to the surface equation
Coordinate；
Deflection detection module, obtains the maximum and minimum value of z coordinate in all discrete points, by the z coordinate most
The difference of big value and minimum value as the glass to be measured deflection.
8. the measuring method of glass deformation amount as claimed in claim 7, it is characterised in that by least square method to the inspection
The world coordinates of measuring point obtains the surface equation of the glass to be measured after being fitted.
9. the measuring method of glass deformation amount as claimed in claim 7, it is characterised in that the glass to be measured is flat by first
Plate is fixed, and the airborne laser range finder is evenly distributed on the second flat board, and first flat board and the second flat board are parallel to each other placement.
10. the measuring method of glass deformation amount as claimed in claim 7, it is characterised in that the edge extracting module enters one
The lamp box for opening the side for being fixed on the glass to be measured is walked, makes to show black border line on the glass to be measured；Pass through
The camera for being fixed on the opposite side of the glass to be measured obtains the picture of the glass to be measured with black border line, passes through
The picture extracts the edge of the glass to be measured；Wherein, the longitudinal direction of the lens axis of the camera and the glass to be measured
Section is parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN107907060A (en) * | 2017-12-15 | 2018-04-13 | 南京鑫业诚机器人科技有限公司 | A kind of glass screen height and flatness checking device |
| CN109579773A (en) * | 2019-01-15 | 2019-04-05 | 蚌埠市鼎荣科技信息咨询有限公司 | A kind of glass deformation measuring method |
| CN113280783A (en) * | 2021-04-21 | 2021-08-20 | 广汽本田汽车有限公司 | Deformation detection method, system and device for automobile covering part and storage medium |
| CN114485454A (en) * | 2022-04-07 | 2022-05-13 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Deformation detection device for dam soil slope |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107907060A (en) * | 2017-12-15 | 2018-04-13 | 南京鑫业诚机器人科技有限公司 | A kind of glass screen height and flatness checking device |
| CN109579773A (en) * | 2019-01-15 | 2019-04-05 | 蚌埠市鼎荣科技信息咨询有限公司 | A kind of glass deformation measuring method |
| CN113280783A (en) * | 2021-04-21 | 2021-08-20 | 广汽本田汽车有限公司 | Deformation detection method, system and device for automobile covering part and storage medium |
| CN113280783B (en) * | 2021-04-21 | 2023-02-28 | 广汽本田汽车有限公司 | Deformation detection method, system and device for automobile covering part and storage medium |
| CN114485454A (en) * | 2022-04-07 | 2022-05-13 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Deformation detection device for dam soil slope |
| CN114485454B (en) * | 2022-04-07 | 2022-06-24 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Deformation detection device for dam soil slope |
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