CN107167088B - Method and device for measuring glass deformation - Google Patents
Method and device for measuring glass deformation Download PDFInfo
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- CN107167088B CN107167088B CN201710337656.6A CN201710337656A CN107167088B CN 107167088 B CN107167088 B CN 107167088B CN 201710337656 A CN201710337656 A CN 201710337656A CN 107167088 B CN107167088 B CN 107167088B
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- 239000011521 glass Substances 0.000 title claims abstract description 229
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- 238000001514 detection method Methods 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims description 31
- 238000000691 measurement method Methods 0.000 claims description 20
- 239000000284 extract Substances 0.000 claims description 9
- 238000013507 mapping Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 3
- 239000005341 toughened glass Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
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- 208000007623 Lordosis Diseases 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- 238000000280 densification Methods 0.000 description 1
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- 239000004744 fabric Substances 0.000 description 1
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Classifications
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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 method and a device for measuring glass deformation, wherein a linear equation of the edge of glass to be measured is used as a domain, a curved surface equation of the glass to be measured is fitted to world coordinates of a plurality of detection points, the curved surface equation is dispersed to obtain the world coordinates of a plurality of discrete points on the glass to be measured, and the deformation of the glass to be measured can be obtained by subtracting the minimum value from the maximum value of z coordinates in all the discrete points.
Description
Technical field
The present invention relates to glass detection field more particularly to a kind of measurement methods and device of glass deformation amount.
Background technique
In recent years, with the high speed development of the large scales 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 tempered glass is the screen in order to protect electronic equipment
Curtain, but the tempered glass on large scale interactive display device will lead to bending and deformation, lordosis or indent meeting due to self weight
Infrared touch failure or screen is caused colored Newton's ring occur.It therefore, must be to tempering glass before tempered glass is bonded with screen
Glass carries out the detection of deflection, to guarantee that product quality meets the requirement of subsequent attaching process.
The prior art primarily directed to the measurement of small size glass, and most is based on three to the detection method of glass deformation amount
It puts after measuring using maximum difference as deflection, the deformation accuracy of measurement that this method obtains is low, is not suitable for large scale glass
Glass.
Summary of the invention
The purpose of the embodiment of the present invention is that providing a kind of measurement method of glass deformation amount, large-size glass can be effectively measured
Deflection, precision is high, as a result reliably.
To achieve the above object, the present invention provides a kind of measurement methods of glass deformation amount, comprising steps of
The edge of glass to be measured is extracted, and by the edge transition of the glass to be measured at the linear equation L of world coordinate system
(x, y)；Wherein, reference axis X, Y and Z that the world coordinate system is mutually perpendicular to and is intersected by three are formed；
The surface of the glass to be measured is obtained by the airborne laser range finder of several known location coordinates described to swash to each
The distance of ligh-ranging device, so that the world for obtaining each test point opposite 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 the plane of z=a, and the plane where the airborne laser range finder be used for
The clamping jig of the fixed glass to be measured is parallel；The clamping jig is located at the plane of z=0, and a ≠ 0；
Using the linear equation of the world coordinate system as domain, 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 value and minimum value for obtaining z coordinate in all discrete points, by the maximum value and minimum value of the z coordinate
Deflection of the difference as the glass to be measured.
Compared with prior art, edge of the measurement method of glass deformation amount disclosed by the invention based on the glass to be measured
Linear equation, then the surface equation of the glass to be measured is fitted to the world coordinates of several test points, then by the curved surface
Equation carry out it is discrete after obtain the world coordinates of several discrete points on the glass to be measured, will all z be sat in the discrete points
Target maximum value, which subtracts minimum value, can be obtained the deflection of the glass to be measured, solves the prior art and is not capable of measuring large scale
The problem of glass deformation amount, accuracy is high, and science is reliable.
As an improvement of the above scheme, the surface equation of the glass to be measured is nurbs surface equation, and to the curved surface
Equation carries out the discrete rear world coordinates for obtaining several discrete points on the glass to be measured specifically:
By preset step-length to the nurbs surface equation carry out it is discrete after obtain a series of nurbs curve equations, then
If being obtained on the glass to be measured after each nurbs curve equation is carried out discrete and mapping by the preset step-length
The world coordinates of dry discrete point.It is fitted nurbs surface, is more convenient flexibly, smoothness is higher, is conducive to the analysis to curved surface.
As an improvement of the above scheme, the airborne laser range finder is evenly distributed on a plate, the plate and the use
It is parallel to each other placement in the clamping jig of fixation glass to be measured.Clamping jig and plate is set to be parallel to each other, i.e., the described laser ranging
The datum plane of plane and the glass to be measured where device is parallel to each other, and guarantees the accuracy of result.
As an improvement of the above scheme, each nurbs curve equation is carried out by curve interpolating method discrete.It adopts
The progress of sample curve interpolating method is discrete, can control the high error of bow, meets the requirement of precision.
As an improvement of the above scheme, the edge of glass to be measured is extracted specifically:
The lamp box for being fixed on the side of the glass to be measured is opened, makes to show black border line on the glass to be measured；
Camera by being fixed on the other side of the glass to be measured obtains the glass to be measured for having black border line
The picture of glass extracts the edge of the glass to be measured by the picture；Wherein, the lens axis of the camera and it is described to
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 accuracy of result.
As an improvement of the above scheme, it is obtained after being fitted by world coordinates of the least square method to the test point
The surface equation of the glass to be measured.Least square method is the common method of surface fitting, and science is reliable.
The embodiment of the invention also provides a kind of measuring devices of glass deformation amount, comprising:
Edge extracting module is converted into world coordinate system for extracting the edge of glass to be measured, and by the glass edge
Linear equation L (x, y)；Wherein, reference axis X, Y and Z that the world coordinate system is mutually perpendicular to and is intersected by three are formed；
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, thus obtain on the glass to be measured with the airborne laser range finder phase
Pair each test point world coordinates；Wherein, each airborne laser range finder is in the plane of z=a, the laser ranging
Plane where device is parallel with for fixing the clamping jig of the glass to be measured；The clamping jig is located at the plane of z=0,
And a ≠ 0；
Surface equation fitting module, for using the linear equation of the world coordinate system as domain, to the detection
The world coordinates of point obtains the surface equation of the glass to be measured after being fitted；
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, for obtaining the maximum value and minimum value of z coordinate in all discrete points, by the z
The deflection of the maximum value of coordinate and the difference of minimum value as the glass to be measured.
Compared with prior art, the measuring device of glass deformation amount disclosed by the invention obtains institute according to edge extracting module
State the linear equation at the edge of glass to be measured, then by test point coordinate obtaining module obtain the airborne laser range finder and it is described to
The distance of glass is surveyed, so that the world coordinates of corresponding multiple test points is obtained, then by surface equation fitting module with to be measured
The linear equation at the edge of glass obtained as domain, after being fitted to the world coordinates of the multiple test point it is described to
The surface equation is carried out the discrete rear multiple discrete points for obtaining glass to be measured by the surface equation for surveying glass, will be the multiple
The coordinate of discrete point is compared, by a distance from the airborne laser range finder to the glass to be measured corresponding maximum coordinate value among subtract
It goes min coordinates value to can be obtained the deflection of the glass to be measured, solves the prior art and be not capable of measuring large-size glass deformation
The problem of amount, accuracy is high, and science is reliable.
As an improvement of the above scheme, it is obtained after being fitted by world coordinates of the least square method to the test point
The surface equation of the glass to be measured.
As an improvement of the above scheme, the glass to be measured is fixed by the first plate, and the airborne laser range finder uniformly divides
On the second plate, first plate and the second plate are parallel to each other placement cloth.
As an improvement of the above 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；The other side by being fixed on the glass to be measured is taken the photograph
As the picture of the to be measured glass of the head acquisition 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.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the measurement method of glass deformation amount in the embodiment of the present invention 1.
Fig. 2 is a kind of flow diagram of the measurement method of glass deformation amount in the embodiment of the present invention 2.
Fig. 3 is the structural schematic diagram that the equipment of glass deformation amount is measured 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 of the curved surface for the glass to be measured being fitted in the embodiment of the present invention 2.
Fig. 7 is a kind of flow diagram of the measurement method of glass deformation amount in the embodiment of the present invention 3.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is a kind of flow diagram of the measurement method for glass deformation amount that the embodiment of the present invention 1 provides referring to Fig. 1.Such as
The measurement method of glass deformation amount shown in FIG. 1 comprising steps of
S11, the edge for extracting glass to be measured, and by the edge transition of the glass to be measured at 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 is intersected by three are formed；
S12, the surface of the glass to be measured is obtained by the airborne laser range finder of several known location coordinates to each institute
The distance of airborne laser range finder is stated, to obtain the generation of each test point opposite 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 the plane of z=a, plane and use where the airborne laser range finder
It is parallel in the clamping jig of the fixation glass to be measured；The clamping jig is located at the plane of z=0, and a ≠ 0；
S13, using the linear equation of the world coordinate system as domain, the world coordinates of the test point is intended
The surface equation of the glass to be measured is obtained after conjunction；
S14, the discrete rear world coordinates for obtaining several discrete points on the glass to be measured is carried out to the surface equation；
S15, the maximum value and minimum value for obtaining z coordinate in all discrete points, by the maximum value of the z coordinate and most
Deflection of the difference of small value as the glass to be measured.
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 the Z for being mutually perpendicular to and being intersected by three are formed；First extract the edge of glass to be measured, obtain it is described to
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, Y coordinates of each laser side range finder as stating on glass to be measured
The X, Y coordinates of each test point opposite with the airborne laser range finder, 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 opposite with the airborne laser range finder on the glass to be measured, i.e., to
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, to P0
(x, y, z)~P15 (x, y, z) is fitted, and obtains the surface equation of the glass to be measured, this equation is glass in world coordinates
Surface equation in system.The surface equation is subjected to the discrete rear some column discrete point P (x, y, z) of acquisition with certain rule,
The maximum value of the z coordinate of whole discrete points, which is subtracted minimum value, can be obtained the deflection of the glass to be measured.According to different
Modeling pattern can get different surface equations, and wherein least square method is to carry out the common 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 for constructing fitting surface as standard.By to
The coordinate for surveying the series of points of glass constructs surface equation, is carrying out discrete obtaining multiple discrete points to the surface equation
Coordinate avoids the measurement put on a large scale using these discrete points as the reference point for the deflection for detecting glass to be measured, saves
Calculation amount, and precision is improved, the shortcomings that prior art is not capable of measuring large-size glass deflection is overcome, applicable glass
Size range is wide, practical.
Referring to fig. 2, be the embodiment of the present invention 2 provide a kind of glass deformation amount measurement method flow diagram.Such as
The measurement method of glass deformation amount shown in Fig. 2 comprising steps of
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 other side by being fixed on the glass to be measured camera obtain with described in the line of black border to
The picture for surveying glass, 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 at the linear equation L (x, y) of world coordinate system；Wherein, the generation
Reference axis X, Y and Z that boundary's coordinate system is mutually perpendicular to and is intersected by three are formed；
S24, the surface of the glass to be measured is obtained by the airborne laser range finder of several known location coordinates to each institute
The distance of airborne laser range finder is stated, to obtain the generation of each test point opposite 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 the plane of z=a, plane and use where the airborne laser range finder
It is parallel in the clamping jig of the fixation glass to be measured；The clamping jig is located at the plane of z=0, and a ≠ 0；
S25, using the linear equation of the world coordinate system as domain, the world coordinates of the test point is intended
The nurbs surface equation of the glass to be measured is obtained after conjunction；
S26, to by preset step-length to the nurbs surface equation carry out it is discrete after obtain a series of nurbs curves
Equation, then by the preset step-length by each nurbs curve equation obtain after discrete and mapping described to be measured
The world coordinates of several discrete points on glass；
S27, the maximum value and minimum value for obtaining z coordinate in all discrete points, by the maximum value of the z coordinate and most
Deflection of the difference of small value as the glass to be measured.
In conjunction with Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the working process and principle of the present embodiment will be specifically described.This implementation
Example is illustrated with the matrix that the airborne laser range finder of 3X5 forms, and the measurement method of glass deformation amount proposed by the invention is not
It is limited to the matrix of the airborne laser range finder of 3X5.When it is implemented, installation and the correction of position first are carried out to each equipment, specifically,
As shown in figure 3, the glass to be measured is fixed on bracket vertically, the airborne laser range finder is uniformly arranged in the same plane, and
Plane locating for the airborne laser range finder is parallel with for fixing the clamping jig of 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 other 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 plane locating for airborne laser range finder as the plane of z=a, using the axis where horizontal direction as X
Axis, using the axis where vertical direction as Y-axis, using the airborne laser range finder to the direction of the glass to be measured as Z axis
Positive direction carries out the conversion of world coordinates 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 of the glass to be measured with black border line is obtained by camera shooting, 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；Lamp box is closed,
By airborne laser range finder obtain each airborne laser range finder to the surface of the glass to be measured distance, after being converted generate described in
The world coordinates P0 (x, y, z) of each test point opposite with the airborne laser range finder~P14 (x, y, z) on glass to be measured, respectively
The position of a test point is as shown in Figure 5；Using the linear equation L (x, y) at edge as domain, 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, resulting curved surface is as shown in fig. 6, again by NURBS
Surface equation S (u, v) discrete is series of points, specially first with preset step-length that nurbs surface is discrete for a series of equal v ginsengs
Number nurbs curve equation C (u), then with same step-length respectively will each equal v parameter nurbs curve 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 value of z coordinate in whole discrete points, which is subtracted minimum value, can be obtained the deflection of the glass to be measured.NURBS is Non-
The abbreviation of Uniform Rational B-Splines, i.e. non-homogeneous B spline curve can construct round and smooth song using NURBS
Face has to calculate and stablize, fireballing characteristic.
Preferably, each nurbs curve is carried out using curve interpolating method discrete.Interpolation Process is exactly interpolated point
Densification.One such mode is that in one cycle, the single order and second order for finding out nurbs curve lead vector, and root
According to determining step-length, current parameter value u is utilizediThe parameter value u in next period is calculated in real timei+1, then find out interpolation on curve
Point C (ui+1), then the coordinate that the interpolated point on curved surface maps back glass to be measured can be obtained into discrete point P (x, y, z).Another interpolation side
Method is that curve is divided into N sections according to preset step-length, finds out the vector of the corresponding node of discrete point, can acquire interpolation on curve
Point C (ui+1).Using the nurbs curve discrete logarithm of equal arc length, it is ensured that the dividing precision and curve approximate error of curve.
Preferably, when glass size is 1500mmX800mm, in order to guarantee the precision of the deflection measured, settable step
A length of 1mm.
Preferably, the airborne laser range finder is evenly distributed on the first plate, the plate and for fixing glass to be measured
Clamping jig be parallel to each other placement, using this fixed form can guarantee plane locating for the airborne laser range finder and it is described to
The datum plane for surveying glass is parallel, ensure that the accuracy of result.
As shown in fig. 7, the present invention also correspondence provides a kind of measuring device 100 of glass deformation amount, comprising:
Edge extracting module 101 is converted into world coordinates for extracting the edge of glass to be measured, and by the glass edge
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 is intersected by three are formed；
Test point coordinate obtaining module 102, for described in the airborne laser range finder acquisition by several known location coordinates
The surface of glass to be measured to each airborne laser range finder distance, thus obtain on the glass to be measured with the laser ranging
The world coordinates of the opposite each test point of device；Wherein, each airborne laser range finder is in the plane of z=a, the laser
Plane where range finder is parallel with for fixing the clamping jig of 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 coordinate system as domain, to the inspection
The world coordinates of measuring point obtains the surface equation of the glass to be measured after being fitted；
Discrete block 104, for the surface equation carry out it is discrete after to obtain on the glass to be measured several discrete
The world coordinates of point；
Deflection detection module 105, for obtaining the maximum value and minimum value of z coordinate in all discrete points, by institute
Deflection of the difference of the maximum value and minimum value of stating z coordinate as the glass to be measured.
It extracts the edge of the glass to be measured when it is implemented, first passing through edge extracting module 101 and is converted to 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, to obtain the world coordinates of corresponding multiple test points, then passes through surface equation fitting module 103
Using the linear equation at the edge of glass to be measured as domain, obtained after being fitted to the world coordinates of the multiple test point
The surface equation is then carried out discrete rear acquisition glass to be measured by discrete block 104 by the surface equation of the glass to be measured
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 the distance of glass, which subtracts min coordinates value, can be obtained 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 obtains the seat of another serial variance point after handling surface equation
Mark, the detection of the deflection suitable for various sizes of glass, accuracy is high, solves the prior art and is not capable of measuring large scale glass
The problem of glass deflection.
In implementation process, using least square method come fit curve equation, technology is more mature, and the curved surface of acquisition is also more
Close to the surface state of actual glass.
Preferably, in order to guarantee that plane locating for the airborne laser range finder is parallel with the glass to be measured, can will it is described to
It surveys glass to fix by the first plate, the airborne laser range finder is evenly distributed on the second plate, first plate and second
Plate is parallel to each other placement.
Preferably, the edge extracting module 101 extracts the detailed process at the edge of the glass to be measured are as follows:
The lamp box for being fixed on the side of the glass to be measured is opened, makes to show black border line on the glass to be measured；It is logical
The picture for being fixed on the to be measured glass of the camera acquisition with black border line of the other side of the glass to be measured is crossed, is led 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 issued 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.The 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 the measurement methods and device of a kind of glass deformation amount, with the glass to be measured
Edge linear equation as domain, 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 whole
The maximum value of z coordinate, which subtracts minimum value, in the discrete point can be obtained the deflection of the glass to be measured, solve existing skill
Art is not capable of measuring the problem of large-size glass deflection, and accuracy is high, and science is reliable.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of measurement method of glass deformation amount, which is characterized in that comprising steps of
Extract the edge of glass to be measured, and by the edge transition of the glass to be measured at 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 is intersected by three are formed；
The surface of the glass to be measured is obtained to each Laser Measuring by the airborne laser range finder of several known location coordinates
Distance away from device, to obtain the world coordinates of each test point opposite with the airborne laser range finder on the glass to be measured；
Wherein, each airborne laser range finder is respectively positioned in the plane of z=a, the plane where the airborne laser range finder with for fixing
The clamping jig of the glass to be measured is parallel；The clamping jig is located at the plane of z=0, and a ≠ 0；
Using the linear equation of the world coordinate system as domain, obtained after being fitted to the world coordinates of the test point
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 value and minimum value for obtaining z coordinate in all discrete points, by the difference of the maximum value of the z coordinate and minimum value
It is worth the deflection as the glass to be measured.
2. the measurement method of glass deformation amount as described in claim 1, which is characterized in that the surface equation of the glass to be measured
For nurbs surface equation, and to the surface equation carry out it is discrete after obtain the generation of several discrete points on the glass to be measured
Boundary's coordinate specifically:
By preset step-length to the nurbs surface equation carry out it is discrete after obtain a series of nurbs curve equations, then pass through
Each nurbs curve equation obtain after discrete and mapping on the glass to be measured several by the preset step-length
The world coordinates of discrete point.
3. the measurement method of glass deformation amount as described in claim 1, which is characterized in that
The airborne laser range finder is evenly distributed on a plate, the plate and the clamping jig for being used to fix glass to be measured
Be parallel to each other placement.
4. the measurement method of glass deformation amount as claimed in claim 2, which is characterized in that will be each by curve interpolating method
The nurbs curve equation carries out discrete.
5. the measurement method of glass deformation amount as described in claim 1, which is characterized in that the edge for extracting glass to be measured is specific
Are as follows:
The lamp box for being fixed on the side of the glass to be measured is opened, makes to show black border line on the glass to be measured；
Camera by being fixed on the other side of the glass to be measured obtains the glass to be measured with black border line
Picture extracts the edge of the glass to be measured 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 measurement method of glass deformation amount as described in claim 1, which is characterized 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 measuring device of glass deformation amount characterized by comprising
Edge extracting module is converted into the straight of world coordinate system for extracting the edge of glass to be measured, and by the glass edge
Line equation L (x, y)；Wherein, reference axis X, Y and Z that the world coordinate system is mutually perpendicular to and is intersected by three are formed；
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, to obtain opposite 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 the plane of z=a, the airborne laser range finder institute
Plane with for fix the clamping jig of the glass to be measured parallel；The clamping jig is located at the plane of z=0, and a ≠
0；
Surface equation fitting module, for using the linear equation of the world coordinate system as domain, to the test point
World coordinates 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 value and minimum value of z coordinate in all discrete points, most by the z coordinate
Deflection of the difference of big value and minimum value as the glass to be measured.
8. the measuring device of glass deformation amount as claimed in claim 7, which is characterized 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 device of glass deformation amount as claimed in claim 7, which is characterized 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 plate, and first plate and the second plate are parallel to each other placement.
10. the measuring device of glass deformation amount as claimed in claim 7, which is characterized in that the edge extracting module is into one
Step is used to open the lamp box for the side for being fixed on the glass to be measured, makes to show black border line on the glass to be measured；Pass through
The camera for being fixed on the other 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.
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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 |
| CN109579773B (en) * | 2019-01-15 | 2020-10-27 | 蚌埠翰邦知识产权服务有限公司 | Glass deformation amount measuring method |
| 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 |
| 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 |
| CN116659448B (en) * | 2023-05-31 | 2024-08-06 | 重庆大学 | Intelligent monitoring system and equipment for deformation of rubber support |
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| CN101672637A (en) * | 2009-09-24 | 2010-03-17 | 华东理工大学 | Digitizing detection method of complicated curved face |
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| CN105783778A (en) * | 2016-04-27 | 2016-07-20 | 中国科学院云南天文台 | Noncontact optical mirror surface detecting system based on laser scanning method and detecting method thereof |
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| US9354043B2 (en) * | 2008-12-04 | 2016-05-31 | Laura P. Solliday | Methods for measuring and modeling the structural health of pressure vessels based on electronic distance measurements |
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| CN101672637A (en) * | 2009-09-24 | 2010-03-17 | 华东理工大学 | Digitizing detection method of complicated curved face |
| CN103884291A (en) * | 2014-03-27 | 2014-06-25 | 河海大学 | Building surface flexible deformation monitoring method based on NURBS parametric surface |
| CN105783778A (en) * | 2016-04-27 | 2016-07-20 | 中国科学院云南天文台 | Noncontact optical mirror surface detecting system based on laser scanning method and detecting method thereof |
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