CN116165760A - Gap precision control method and system based on three-dimensional surface virtual superposition - Google Patents
Gap precision control method and system based on three-dimensional surface virtual superposition Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/30—Determination of transform parameters for the alignment of images, i.e. image registration
- G06T7/33—Determination of transform parameters for the alignment of images, i.e. image registration using feature-based methods
- G06T7/344—Determination of transform parameters for the alignment of images, i.e. image registration using feature-based methods involving models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
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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
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/003—Alignment of optical elements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/11—Region-based segmentation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/70—Determining position or orientation of objects or cameras
- G06T7/73—Determining position or orientation of objects or cameras using feature-based methods
- G06T7/75—Determining position or orientation of objects or cameras using feature-based methods involving models
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention belongs to the technical field of virtual assembly, and provides a gap precision control method and system based on virtual superposition of three-dimensional surfaces, wherein a first virtual plane is obtained through fitting of coordinate data; determining a second virtual plane according to coordinates of a plurality of points corresponding to the two planes and the intervals among the points; calculating a difference vector between the first virtual plane normal vector and the second virtual plane normal vector; according to the difference vector, calculating the rotation angle of the second virtual plane to be adjusted; according to the rotation angle and the coordinate data, the relative position between the two lenses is adjusted, and the adjusted superposition gap is obtained by reverse calculation.
Description
Technical Field
The invention belongs to the technical field of virtual assembly, and particularly relates to a gap precision control method and system based on three-dimensional surface virtual superposition.
Background
For various optical elements related to imaging, the assembly precision directly influences the quality of optical imaging, so that the assembly process often has very high requirements on the superposition precision of the multilayer optical lenses.
The inventor finds that most of the existing common ultra-precise gap control methods only consider superposition gap errors, certain flatness errors exist in the optical lenses, and the errors existing in the optical lenses directly influence superposition gap precision, so that parallelism among the lenses after superposition is poor, assembly qualification rate of high-precision elements is relatively low, and imaging requirements of the lenses after superposition are difficult to meet.
Disclosure of Invention
In order to solve the problems, the invention provides a gap precision control method and a gap precision control system based on three-dimensional surface virtual superposition.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect, the present invention provides a gap accuracy control method based on virtual lamination of three-dimensional surfaces, including:
acquiring coordinate data of one plane of an object to be overlapped, coordinates of a plurality of points corresponding to the two planes and intervals among the points;
fitting to obtain a first virtual plane according to the coordinate data; calculating a normal vector of the first virtual plane;
the first virtual plane is taken as a reference plane, and a second virtual plane is determined according to coordinates of a plurality of corresponding points on the two planes and the intervals among the points; calculating the normal vector of the second virtual plane;
according to the normal vector of the first virtual plane and the normal vector of the second virtual plane, calculating to obtain a difference vector of the two normal vectors;
according to the difference vector, calculating a rotation angle to be adjusted of the second virtual plane;
and reversely calculating to obtain the adjusted superposition gap according to the rotation angle and the coordinate data.
Further, according to the coordinate data, a least square method is adopted to obtain a first virtual plane with the flatness error of 0 through fitting.
Further, the second virtual plane and the first virtual plane are aligned in space by using the normal vector of the first virtual plane and the normal vector of the second virtual plane, and the angle required to be adjusted in alignment is the rotation angle required to be adjusted by plane superposition.
Further, the rotation angle includes an angle of rotation about an X axis and an angle of rotation about a Y axis.
Further, the planar object is a lens.
Further, dividing the two plane objects into a plurality of subareas with the same area respectively, and calculating sub-difference vectors in each subarea; and determining the point with the maximum deviation and the minimum deviation between the difference vector and each sub-difference vector, reversely solving the superposition error at the corresponding point by using the deviation and the interval measurement value of the sub-region, and predicting the superposition gap.
Further, taking the difference between the maximum value and the minimum value of the interval error after adjustment as a final error; if the final error is larger than the preset target error range, the overlapped part is not qualified, otherwise, the overlapped part is qualified.
In a second aspect, the present invention further provides a gap accuracy control system based on virtual lamination of three-dimensional surfaces, including:
a data acquisition module configured to: acquiring coordinate data of one plane of an object to be overlapped, coordinates of a plurality of points corresponding to the two planes and intervals among the points;
a first virtual plane fitting module configured to: fitting to obtain a first virtual plane according to the coordinate data; calculating a normal vector of the first virtual plane;
a second virtual plane fitting module configured to: the first virtual plane is taken as a reference plane, and a second virtual plane is determined according to coordinates of a plurality of corresponding points on the two planes and the intervals among the points; calculating the normal vector of the second virtual plane;
a difference vector calculation module configured to: according to the normal vector of the first virtual plane and the normal vector of the second virtual plane, calculating to obtain a difference vector of the two normal vectors;
a rotation angle calculation module configured to: according to the difference vector, calculating a rotation angle to be adjusted of the second virtual plane;
a superimposition gap calculation module configured to: and reversely calculating to obtain the adjusted superposition gap according to the rotation angle and the coordinate data.
In a third aspect, the present invention also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the gap accuracy control method based on virtual superposition of three-dimensional surfaces of the first aspect.
In a fourth aspect, the present invention further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the gap precision control method based on virtual superposition of three-dimensional surfaces according to the first aspect when the processor executes the program.
Compared with the prior art, the invention has the beneficial effects that:
1. the method comprises the steps of fitting to obtain a first virtual plane through coordinate data; determining a second virtual plane according to coordinates of a plurality of points corresponding to the two planes and the intervals among the points; calculating a difference vector between the first virtual plane normal vector and the second virtual plane normal vector; according to the difference vector, calculating the rotation angle of the second virtual plane to be adjusted; the relative position between the two lenses can be adjusted according to the rotation angle and the coordinate data, and the adjusted superposition gap is obtained by reverse calculation;
2. according to the method, two plane objects are divided into a plurality of subareas respectively in the same area, and sub-difference vectors in each subarea are calculated; and determining the point with the maximum deviation and the minimum deviation between the difference vector and each sub-difference vector, reversely solving the superposition error at the corresponding point by using the deviation and the interval measurement value of the sub-areas, predicting the superposition gap, removing unqualified products in advance, and improving the superposition qualification rate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate and explain the embodiments and together with the description serve to explain the embodiments.
FIG. 1 is a schematic diagram of the method of example 1 according to the present invention, fitting a plane to a clearance value and solving for vector normal coordinates;
FIG. 2 is a schematic of the normal vector of example 1 of the present invention;
FIG. 3 is a schematic view of dividing a plane into small areas with the same area and solving for a normal vector in embodiment 1 of the present invention;
1, a first virtual plane; 2. and a second virtual plane.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Example 1:
aiming at the problem that errors existing in optical lenses can directly influence the precision of overlapping gaps, so that parallelism among the lenses after overlapping is poor, assembly qualification rate of high-precision elements is relatively low, and imaging requirements of the lenses after overlapping are difficult to meet, as shown in fig. 1, the embodiment provides a gap precision control method based on three-dimensional surface virtual overlapping, which comprises the following steps:
acquiring coordinate data of one plane of an object to be overlapped, coordinates of a plurality of points corresponding to the two planes and intervals among the points; the planar object is a transparent planar object, such as a lens;
fitting to obtain a first virtual plane according to the coordinate data; calculating a normal vector of the first virtual plane;
the first virtual plane is taken as a reference plane, and a second virtual plane is determined according to coordinates of a plurality of corresponding points on the two planes and the intervals among the points; calculating the normal vector of the second virtual plane;
according to the normal vector of the first virtual plane and the normal vector of the second virtual plane, calculating to obtain a difference vector of the two normal vectors;
according to the difference vector, calculating a rotation angle to be adjusted of the second virtual plane;
reversely calculating to obtain an adjusted superposition gap according to the rotation angle and the coordinate data; it can be understood that, after the adjustment is performed according to the rotation angle required to be adjusted by the second virtual plane, the adjusted overlapping gap is obtained by reverse calculation, that is, the overlapping gap required to be adjusted by the second virtual plane is obtained by calculation; the adjustment of the rotation angle ensures the accuracy of the parallelism of the two planes, and the adjustment of the superposition clearance ensures the accuracy of the spacing between the two planes.
Specifically, firstly, carrying out data processing on the surface of a planar object, carrying out three-dimensional scanning on one plane of planes to be overlapped to obtain three-dimensional coordinates of each point on the surface, fitting a first virtual plane according to the obtained three-dimensional coordinates, and obtaining the normal vector of the plane, wherein the first virtual plane is an imaginary plane with a flatness error of 0. And measuring the corresponding distances of a plurality of coordinate points between the two planes by using a range finder, fitting a second virtual plane by using the obtained distance values, solving a normal vector, aligning the two obtained normal vectors in space, wherein the angle required to be adjusted for aligning is the angle required to be adjusted for plane superposition, and reversely calculating the superposition gap after the coordinate point is adjusted according to the angle required to be adjusted by the normal vector and the three-dimensional coordinates of the plane points. By using the method, the influence factor of flatness error, namely the superposition accuracy, can be taken into consideration in the superposition process of two planes, and the final superposition accuracy is improved.
First, to the need to match twoThree-dimensional scanning is carried out on one plane of each plane object, three-dimensional coordinate data of the surface of the plane object is obtained, and a virtual plane x with the flatness error of 0 is fitted by adopting a least square method according to the obtained three-dimensional coordinate data 1 y 1 z 1 And find the virtual plane x 1 y 1 z 1 Normal vector a of (2) 1 (a 1 ，b 1 ，c 1 ) Such that all coordinates of the planar object surface are brought to said virtual plane x 1 y 1 z 1 Is relatively minimum, the virtual plane x 1 y 1 z 1 I.e. the first virtual plane 1 used in overlay alignment, said virtual plane x 1 y 1 z 1 Is an imaginary plane.
Optionally, the two planes to be overlapped are placed to the preset position of overlapping under the cooperation of the range finder, the centers of the two planes are aligned, and the alignment mode can be selected from the modes of limiting of a precise clamp, visual alignment and the like.
As shown in fig. 1, 9 fixed points are taken in the first virtual plane 1, denoted as A, B, C, D, E, F, G, H and I; the coordinates corresponding to the fixed points correspond to (x) n ，y n ) Where n is the number of one of the fixed points a to I. The corresponding gaps h at these points are measured by a distance meter A 、h B 、h C 、h D 、h E 、h F 、h G 、h H And h I . Coordinates of fixed point (x n ，y n ) Gap value h corresponding to it n To form a new three-dimensional coordinate set (x n ，y n ，h n ) Fitting another virtual plane x according to the three-dimensional coordinate set 2 y 2 z 2 I.e. the second virtual plane 2, and determining the normal vector A of the second virtual plane 2 2 (a 2 ，b 2 ，c 2 )。
Using the two normal vectors A obtained 1 And A 2 The first virtual plane 1 and the second virtual plane 2 are aligned in space, and the angle required to be adjusted for alignment is the angle required to be adjusted for plane superposition. The method comprises the following steps: solving for two normal vectors A 1 And A 2 Is the difference vector of (2)A 00 (d 1 ，e 1 ，f 1 ) Wherein d 1 ＝a 1 －a 2 ，e 1 ＝b 1 －b 2 ，f 1 ＝c 1 －c 2 According to the difference vector A 00 Calculating the angle X of the planar pose adjustment needing to rotate around the X axis angle1 Angle Y to be rotated about Y axis angle1 ：
The two plane positions after the angle rotation are the optimal angles of the relative parallelism between the planes. And fine tuning is carried out in the height direction according to the measurement result of the distance meter, so as to obtain the target gap.
According to the angle of normal vector adjustment and the three-dimensional coordinates of the plane point, the superposition gap h after adjustment at the coordinate point can be reversely calculated:
predicting a superposition gap by adopting a three-dimensional surface virtual superposition method; according to the method, the fitting plane and normal vector of the two overlapped surfaces are obtained, and the difference vector A is obtained according to the two normal vectors 00 Difference vector A 00 Is a vector used for alignment of two planes. Dividing two planes into a plurality of small areas respectively with the same area, carrying out plane fitting on each small area again by using the method mentioned by the technical point one, and solving a difference vector A n0 Difference vector A n0 Vectors used in the alignment for the individual small regions. Find A 00 And A is a n0 The point with the maximum deviation and the point with the minimum deviation is reversely solved by the deviation of the two difference vectors and the interval measurement value of the small area to obtain the superposition error at the corresponding point, thereby realizing the precision prediction before superposition; specific:
as shown in FIG. 2, a fitting plane x of the two superimposed surfaces is determined according to the method described above 1 y 1 z 1 、x 2 y 2 z 2 Normal vector a 1 (a 1 ，b 1 ，c 1 ) Normal vector a 2 (a 2 ，b 2 ，c 2 ) Sum and difference vector A 00 (d 1 ，e 1 ，f 1 ) Difference vector A 00 Is a vector used for alignment of two planes.
Dividing two planes into a plurality of subareas S respectively with the same area 1 、S 2 ...S n Performing plane fitting on each subarea again and solving sub-normal vector A 11 Normal vector A of sub- 21 .. the subnormal vector A n1 Normal vector A of sub- 12 Normal vector A of sub- 22 .. the subnormal vector A n2 Sub-difference vector A 10 Sub-difference vector A 20 .. sub-difference vector A n0 Sub-difference vector A n0 Vectors used in the alignment of the individual sub-regions.
Find A n0 Middle and A 00 Vector A with the greatest deviation max An initial interval value h at this point max ，A n0 Middle and A 00 Vector A with minimum deviation min An initial interval value h at this point min At the two points, the difference is according to the difference vector A 1 And (5) aligning the two planes to be parallel, and then setting the point of maximum and minimum gap errors.
Calculation of A max And A is a 00 Is a difference vector (d) max ，e max ，f max )，A min And A is a 00 Is a difference vector (d) min ，e min ，f min ) Calculating the maximum value S of the interval error after adjustment max And minimum value S min ：
Final error s=s max －S min If S is larger than the target error range, the overlapped part is unqualified, and if S is within the target error range, the overlapped part is qualified, so that the precision prediction before overlapping is realized.
The traditional method for calculating the assembly clearance based on plane fitting mostly adopts edge data points or small part of data points to calculate the clearance, and the method mentioned in the embodiment can fully apply the acquired data points to superposition calculation, so that the reliability of a calculation result is higher.
Example 2:
the embodiment provides a gap precision control system based on three-dimensional surface virtual superposition, which comprises the following steps:
a data acquisition module configured to: acquiring coordinate data of one plane of an object to be overlapped, coordinates of a plurality of points corresponding to the two planes and intervals among the points;
a first virtual plane fitting module configured to: fitting to obtain a first virtual plane according to the coordinate data; calculating a normal vector of the first virtual plane;
a second virtual plane fitting module configured to: the first virtual plane is taken as a reference plane, and a second virtual plane is determined according to coordinates of a plurality of corresponding points on the two planes and the intervals among the points; calculating the normal vector of the second virtual plane;
a difference vector calculation module configured to: according to the normal vector of the first virtual plane and the normal vector of the second virtual plane, calculating to obtain a difference vector of the two normal vectors;
a rotation angle calculation module configured to: according to the difference vector, calculating a rotation angle to be adjusted of the second virtual plane;
a superimposition gap calculation module configured to: and reversely calculating to obtain the adjusted superposition gap according to the rotation angle and the coordinate data.
The working method of the system is the same as the gap precision control method based on the three-dimensional surface virtual superposition in embodiment 1, and is not described here again.
Example 3:
the present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the gap accuracy control method based on virtual superimposition of three-dimensional surfaces described in embodiment 1.
Example 4:
the present embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the steps of the gap precision control method based on virtual superposition of three-dimensional surfaces described in embodiment 1 are implemented when the processor executes the program.
The above description is only a preferred embodiment of the present embodiment, and is not intended to limit the present embodiment, and various modifications and variations can be made to the present embodiment by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.
Claims (10)
1. The gap precision control method based on the three-dimensional surface virtual superposition is characterized by comprising the following steps of:
acquiring coordinate data of one plane of an object to be overlapped, coordinates of a plurality of points corresponding to the two planes and intervals among the points;
fitting to obtain a first virtual plane according to the coordinate data; calculating a normal vector of the first virtual plane;
the first virtual plane is taken as a reference plane, and a second virtual plane is determined according to coordinates of a plurality of corresponding points on the two planes and the intervals among the points; calculating the normal vector of the second virtual plane;
according to the normal vector of the first virtual plane and the normal vector of the second virtual plane, calculating to obtain a difference vector of the two normal vectors;
according to the difference vector, calculating a rotation angle to be adjusted of the second virtual plane;
and reversely calculating to obtain the adjusted superposition gap according to the rotation angle and the coordinate data.
2. The gap precision control method based on three-dimensional surface virtual superposition according to claim 1, wherein a first virtual plane with flatness error of 0 is obtained by fitting by using a least square method according to the coordinate data.
3. The gap precision control method based on three-dimensional surface virtual superposition according to claim 1, wherein the second virtual plane and the first virtual plane are aligned in space by using a normal vector of the first virtual plane and a normal vector of the second virtual plane, and an angle required to be adjusted for alignment is a rotation angle required to be adjusted for plane superposition.
4. A method of gap accuracy control based on virtual superposition of three-dimensional surfaces as defined in claim 1, wherein said rotation angle comprises an angle of rotation about an X-axis and an angle of rotation about a Y-axis.
5. The method for controlling gap accuracy based on virtual superposition of three-dimensional surfaces according to claim 1, wherein said planar object is a lens.
6. The gap precision control method based on three-dimensional surface virtual superposition according to claim 1, wherein two planar objects are divided into a plurality of subareas with the same area respectively, and sub-difference vectors in each subarea are calculated; and determining the point with the maximum deviation and the minimum deviation between the difference vector and each sub-difference vector, reversely solving the superposition error at the corresponding point by using the deviation and the interval measurement value of the sub-region, and predicting the superposition gap.
7. The gap accuracy control method based on virtual superposition of three-dimensional surfaces according to claim 6, wherein the difference between the maximum value and the minimum value of the interval error after adjustment is used as a final error; if the final error is larger than the preset target error range, the overlapped part is not qualified, otherwise, the overlapped part is qualified.
8. A gap accuracy control system based on virtual superposition of three-dimensional surfaces, comprising:
a data acquisition module configured to: acquiring coordinate data of one plane of an object to be overlapped, coordinates of a plurality of points corresponding to the two planes and intervals among the points;
a first virtual plane fitting module configured to: fitting to obtain a first virtual plane according to the coordinate data; calculating a normal vector of the first virtual plane;
a second virtual plane fitting module configured to: the first virtual plane is taken as a reference plane, and a second virtual plane is determined according to coordinates of a plurality of corresponding points on the two planes and the intervals among the points; calculating the normal vector of the second virtual plane;
a difference vector calculation module configured to: according to the normal vector of the first virtual plane and the normal vector of the second virtual plane, calculating to obtain a difference vector of the two normal vectors;
a rotation angle calculation module configured to: according to the difference vector, calculating a rotation angle to be adjusted of the second virtual plane;
a superimposition gap calculation module configured to: and reversely calculating to obtain the adjusted superposition gap according to the rotation angle and the coordinate data.
9. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the gap accuracy control method based on virtual superposition of three-dimensional surfaces as claimed in any one of claims 1 to 7.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the gap accuracy control method based on virtual folding of three-dimensional surfaces as claimed in any one of claims 1-7 when executing the program.
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