CN109509258A - A kind of product based on 3-D scanning inversely deconstructs method - Google Patents
A kind of product based on 3-D scanning inversely deconstructs method Download PDFInfo
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- CN109509258A CN109509258A CN201811302955.7A CN201811302955A CN109509258A CN 109509258 A CN109509258 A CN 109509258A CN 201811302955 A CN201811302955 A CN 201811302955A CN 109509258 A CN109509258 A CN 109509258A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/10—Constructive solid geometry [CSG] using solid primitives, e.g. cylinders, cubes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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Abstract
The invention discloses a kind of products based on 3-D scanning inversely to deconstruct method, comprising the following steps: S1: product is placed on turntable；S2: determining the scanning benchmark of product, in the fixed multiple mark points in the surface of product；S3: turntable turns over set angle from static at predetermined time intervals, it is scanned simultaneously using surface of the depth scan instrument to product, to obtain the point cloud data set as composed by the surface data of product, wherein, set angle is currently to face the mark point of depth scan instrument to the central angle between next mark point；S4: point cloud data set is imported into Imageware software, carries out points cloud processing；S5: S3 treated data are imported into three-dimensional software, reverse modeling is carried out, obtains the threedimensional model of product.The present invention can deconstruct the structure of existing product, rapidly and accurately obtain the Three Dimensional Design Model of product, and ensure that the precision of Three Dimensional Design Model.
Description
Technical field
The present invention relates to products to reverse-engineer field, the in particular to reverse side of destructing of a kind of product based on 3-D scanning
Method.
Background technique
Reverse-engineering (also known as reversal technique) is a kind of product design technology reproducing processes, i.e., to a target product into
Row conversed analysis and research, thus process flow, institutional framework, functional characteristic and the technical specification etc. deducing and obtain the product
Design element, function is close to produce, but not exclusively the same product.
Hardware analysis of the reverse-engineering in business and military field.Main purpose is cannot to obtain necessity easily
Production information in the case where, directly from check analysis, derive the design principle of product.Reverse Engineering Technology has been applied at present
It is the important branch for absorbing advanced technology and shortening the product design and development period in the duplication, imitated, improvement and innovative design of product
Support means are widely used in the fields such as machinery, aviation, automobile, medical treatment, art.
With the prevalence of CAD, reverse-engineering becomes a kind of and can be passed through according to existing physical unit
The method that CAD, CAM, CAE or other software construct 3D dummy model.The process of reverse-engineering is used by measuring practical object
The size of body and the method for being made into 3D model, true object can pass through such as CMMs, laser scanner, structure light source
Conversion device or x-ray tomography are imaged these 3D scanning techniques and carry out dimensional measurement.These measurement data are usually remembered as a little
Collection, lacks topology information and at the same time more useful format, such as polygonal mesh would generally be made into, nurbs curve or
CAD model.Since vertex cloud itself is intuitive unlike the model in 3D software, thus as 3-matic, Imageware,
PolyWorks, Rapidform perhaps these softwares of Geomagic both provide by vertex cloud become can visual image or by
Other application software, such as the function of 3D CAD, CAM, CAE format identified.
But the general scanning accuracy of the scanning of the prior art is not high, integrity degree is inadequate, two easily cause the later period that will sweep in this way
When the point cloud data retouched imports reconstruction model in software, split precision is not high, and feature in kind can not be reacted after reverse modeling, is led
Cause reverse modeling failure.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of products based on 3-D scanning inversely to deconstruct method, with destructing
The structure of existing product, rapidly and accurately obtains the Three Dimensional Design Model of product, and ensure that the precision of Three Dimensional Design Model.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is as follows:
A kind of product based on 3-D scanning inversely deconstructs method, comprising the following steps:
S1: product is placed on turntable；
S2: determining the scanning benchmark of product, in the fixed multiple mark points in the surface of product；
S3: the turntable turns over set angle from static at predetermined time intervals, while using depth scan instrument to product
Surface is scanned, to obtain the point cloud data set as composed by the surface data of product, wherein the set angle is to work as
Before face the mark point of the depth scan instrument to the central angle between next mark point；
S4: the point cloud data set is imported into Imageware software, carries out points cloud processing；
S5: S3 treated data are imported into three-dimensional software, reverse modeling is carried out, obtains the threedimensional model of product.
Preferably, in S3, the cooperation scanning step of the turntable and the depth scan instrument is as follows:
S301: face where the current markers point of product is scanned, and saves current point cloud data；
S302: the turntable turns over the set angle, to go to next mark point from the current markers point；
S303: judging whether that all mark points have been scanned, if it is not, then returning to S301；If it is, carrying out
S304；
S304: sequentially splice point cloud data corresponding to different mark points.
Preferably, in S3, there are two rotational freedoms for the turntable tool.
Preferably, the points cloud processing includes: that data remove dryness；Data compaction；Data segmentation.
Preferably, the three-dimensional software is CATIA or UG.
Compared with prior art, the beneficial effects of the present invention are: product is placed on turntable, pass through setting scanning base
Quasi- and multiple mark points, the scan path set, to simplify scanning process and reduce difficulty in computation.The present invention passes through
The combination of different software reduces the difficulty of product structure measurement and reduction, shortens the design cycle.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the flow chart that a kind of product based on 3-D scanning of the present invention inversely deconstructs method；
Fig. 2 is the detail flowchart of step S3 in Fig. 1.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
As shown in Figure 1, the invention discloses a kind of products based on 3-D scanning inversely to deconstruct method, including following step
It is rapid:
S1: product is placed on turntable；
S2: determining the scanning benchmark of product, in the fixed multiple mark points in the surface of product；
S3: turntable turns over set angle from static at predetermined time intervals, while using depth scan instrument to the surface of product
It is scanned, to obtain the point cloud data set as composed by the surface data of product, wherein set angle is currently to face
The mark point of depth scan instrument is to the central angle between next mark point；
S4: point cloud data set is imported into Imageware software, carries out points cloud processing；
S5: S3 treated data are imported into three-dimensional software, reverse modeling is carried out, obtains the threedimensional model of product.
In S1, there are two rotational freedoms for turntable tool.Wherein, two rotational freedoms mean that rotary motion trace is limit
System is at one using mass center as on the spherical surface of the center of circle: assuming that establishing x with the centre of sphere, y, z coordinate, the two angles are exactly in x, y plane
Interior and x angle, and the angle with z-axis.It can be fully described with the two angles, because of the angle value range with x
In any corner that 0 to 360 degree can cover spherical surface 0 to 180 degree plus the angle value range with z.Therefore, it is fixed on
Product on turntable can rotate under two rotational freedoms with turntable.If scanner of the invention is fixed, product energy
Enough as turntable rotates, so that six face views of product can face scanner.
In S2, number and the interval of the fixed mark point in the surface of product are determined according to the shape of product, size.Due to
The restriction of the scanning range and scanning accuracy of scanner, if small product size is excessive, and product faces scanner at this time
The sectional area of active view is also excessive, then single pass will not be able to the data for completely obtaining active view.It should be noted that
It is that using Point-clouds Registration, certain degree of overlapping will be had by needing to scan between two stations of subject, is generally greater than
30%, and have more apparent characteristic point.Therefore, it is necessary to which multiple mark points and interval are set in this view in advance, so that
The degree of overlapping for obtaining scanning range representated by each adjacent two mark point is greater than 30%.The setting at interval defines turning for turntable
Dynamic angle.Turntable can rotate so that mark point is scanned instrument in order.
In S3, as shown in Fig. 2, the cooperation scanning step of specific turntable and depth scan instrument is as follows:
S301: face where the current markers point of product is scanned, and saves current point cloud data；
S302: turntable turns over set angle, to go to next mark point from current markers point；
S303: judging whether that all mark points have been scanned, if it is not, then returning to S301；If it is, carrying out
S304；
S304: sequentially splice point cloud data corresponding to different mark points.
Firstly, scanner obtains the point cloud data in current markers point place face, and save.Then, according to set by step S2
Fixed mark point interval and mark point number, driven by rotary disc product are mobile, so that product faces the position of scanner from working as
Preceding mark point goes to next mark point.Turntable turns over set angle from static at predetermined time intervals, wherein set angle is to work as
Before face the mark point of depth scan instrument to the center of circle between next mark point.Simultaneously using depth scan instrument to product
Surface is scanned, and to obtain the point cloud data set as composed by the surface data of product, and is saved each mark point and is swept
Data after retouching.Finally, computer can sequentially number point cloud data corresponding to the different mark points of splicing, splice the result of calculating
Also rely on interval and the set angle of each adjacent two mark point.
In S4, point cloud data set is imported into Imageware software, carries out points cloud processing.Wherein, points cloud processing is specific
It include: that data remove dryness；Data compaction；Data segmentation.During obtaining point cloud data using scanner, it will receive scanning and set
More or less there is noise spot in standby, ambient enviroment, the artificial disturbance even influence of sweep object Facing material, obtained data,
To cannot correctly express the spatial position of sweep object.In one embodiment, the present invention can use filtering and remove dryness method
Or Laplce removes dryness the noise of the orderly point cloud data of the removals such as method, bilateral filtering algorithm.Data compaction is allowed in precision
The lower data volume for reducing point cloud data, takes out redundancy, extracts effective information.Wherein, redundant data refers to after Registration of Measuring Data, weight
The data in region are answered, and the data volume of this partial data is big, mostly hash.And it vacuates simplification and refers to that the data of scanning are close
It spends greatly, quantity is excessive, and a portion data are little for later period modeling use.Sampling method can be used by vacuating simplification.It is right
In complicated scan image, if directly modeled using point cloud data, fitting algorithm can be very complicated.It therefore, can will be complicated right
As carrying out point cloud data segmentation, recombinant after modeling respectively, to simplify data and calculating.Data segmentation can mainly have three
Kind: the dividing method based on side, the dividing method based on face and the dividing method based on cluster.
Three-dimensional software is CATIA or UG in S5.Three-dimensional software to the data after S4 step points cloud processing carry out into
The line of one step, face, entity handles, to obtain modelling effect figure.
To sum up, depth scan instrument of the invention can obtain scanner at a distance from product surface, to obtain product table
The fluctuations in face.Product is placed on turntable, by setting scanning benchmark and multiple mark points, the scanning set
Path, the combination of depth scan instrument and turntable can simplify scanning process and reduce difficulty in computation.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.
Claims (5)
1. a kind of product based on 3-D scanning inversely deconstructs method, which comprises the following steps:
S1: product is placed on turntable；
S2: determining the scanning benchmark of product, in the fixed multiple mark points in the surface of product；
S3: the turntable turns over set angle from static at predetermined time intervals, while using depth scan instrument to the surface of product
Be scanned, to obtain the point cloud data set as composed by the surface data of product, wherein the set angle be it is current just
Against the depth scan instrument mark point to the central angle between next mark point；
S4: the point cloud data set is imported into Imageware software, carries out points cloud processing；
S5: S3 treated data are imported into three-dimensional software, reverse modeling is carried out, obtains the threedimensional model of product.
2. a kind of product based on 3-D scanning according to claim 1 inversely deconstructs method, which is characterized in that in S3
In, the cooperation scanning step of the turntable and the depth scan instrument is as follows:
S301: face where the current markers point of product is scanned, and saves current point cloud data；
S302: the turntable turns over the set angle, to go to next mark point from the current markers point；
S303: judging whether that all mark points have been scanned, if it is not, then returning to S301；If it is, carrying out S304；
S304: sequentially splice point cloud data corresponding to different mark points.
3. a kind of product based on 3-D scanning according to claim 2 inversely deconstructs method, which is characterized in that in S3
In, there are two rotational freedoms for the turntable tool.
4. a kind of product based on 3-D scanning according to claim 1 inversely deconstructs method, which is characterized in that the point
Cloud processing includes: that data remove dryness；Data compaction；Data segmentation.
5. a kind of product based on 3-D scanning according to claim 1 inversely deconstructs method, which is characterized in that described three
Dimension software is CATIA or UG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811302955.7A CN109509258A (en) | 2018-11-02 | 2018-11-02 | A kind of product based on 3-D scanning inversely deconstructs method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811302955.7A CN109509258A (en) | 2018-11-02 | 2018-11-02 | A kind of product based on 3-D scanning inversely deconstructs method |
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| Publication Number | Publication Date |
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| CN109509258A true CN109509258A (en) | 2019-03-22 |
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| CN201811302955.7A Withdrawn CN109509258A (en) | 2018-11-02 | 2018-11-02 | A kind of product based on 3-D scanning inversely deconstructs method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111950154A (en) * | 2020-08-14 | 2020-11-17 | 昆山同日工业自动化有限公司 | Industrial three-dimensional scanning reverse modeling detection system based on 5G communication |
| CN112991541A (en) * | 2021-04-06 | 2021-06-18 | 中国建筑第二工程局有限公司 | Rockery reverse modeling method, device, equipment and medium based on BIM |
| CN115420196A (en) * | 2022-08-30 | 2022-12-02 | 天津大学 | Universal three-dimensional object measuring method and device |
-
2018
- 2018-11-02 CN CN201811302955.7A patent/CN109509258A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111950154A (en) * | 2020-08-14 | 2020-11-17 | 昆山同日工业自动化有限公司 | Industrial three-dimensional scanning reverse modeling detection system based on 5G communication |
| CN112991541A (en) * | 2021-04-06 | 2021-06-18 | 中国建筑第二工程局有限公司 | Rockery reverse modeling method, device, equipment and medium based on BIM |
| CN112991541B (en) * | 2021-04-06 | 2022-07-12 | 中国建筑第二工程局有限公司 | Rockery reverse modeling method, device, equipment and medium based on BIM |
| CN115420196A (en) * | 2022-08-30 | 2022-12-02 | 天津大学 | Universal three-dimensional object measuring method and device |
| CN115420196B (en) * | 2022-08-30 | 2023-11-14 | 天津大学 | General object three-dimensional measurement method and device |
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Application publication date: 20190322 |