CN105479742B - A kind of paper base 3D printing method based on NSDTF-DEM data - Google Patents
A kind of paper base 3D printing method based on NSDTF-DEM data Download PDFInfo
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Abstract
The paper base 3D printing method based on NSDTF-DEM data that the invention discloses a kind of.NSDTF-DEM data are converted to the dem data of ArcInfo ASCII Grid format by this method first, then the three-dimensional surface building that triangle mesh curved surface algorithm carries out dem data is generated according to raster symbol-base principle and regular grid, and it is modeled according to the three-dimensional surface by the 3 D stereo that offset, stretching and cutting method carry out dem data, finally by etc. the thickness principle of stratification threedimensional model of DEM is layered, and the three dimensional model printing of DEM is exported using paper base 3D printing method.This method is high to the modeling process fast and stable of dem data, precision, paper base 3D printing method shortens the 3D printing time, it is environmentally protective, and other backing materials are not needed in print procedure, the three-dimensional configuration of Law of DEM Data can be completely presented in obtained 3D printing model, also have higher printing precision for mountain peak and river.
Description
Technical field
The present invention relates to the solid modelling field digital elevation model (Digital Elevation Model, vehicle economy M),
More particularly to a kind of paper base 3D printing method based on NSDTF-DEM data.
Background technique
Geographic information data is with certain related vector quantization mark estimated mode and describe and measure geographic object, number
Elevation model (Digital Elevation Model, vehicle economy M) is to indicate ground elevation with one group of orderly array of values form
Actual ground model, be a kind of typical geographic information data.Dem data is in mapping, the hydrology, meteorology, landforms, geology, soil
The national economy such as earth, engineering construction, communication, military affairs and national defense construction and humanity and natural science field suffer from particularly significant
Effect can be used for calculating, the flux-vector splitting of earth volume in terms of engineering construction, in terms of flood control and disaster reduction, can be used for the hydrology point
Analysis can be used for base station analysis of cellular phone etc. in terms of wireless telecommunications.Currently, geographic information data mostly be by software into
Row mock inspection, and then solving practical problems, but the 3-dimensional image simulated and true three-dimensional information be there are still biggish difference,
Exact 3 D stereo information cannot be conveyed to people in practical applications, the mold based on geographic information data manufactures also rather
Difficulty, thus, the 3D printing technique of geographic information data just seems particularly significant and necessary.
NSDTF-DEM is National Standard of the People's Republic of China's geo-spatial data transfer format --- Grid square exchange
Format, but the DEM file of this format cannot be mutually compatible with existing three-dimensional information processing software.Many scholars are to NSDTF-
Dem data format is studied, it is found that data notepad opening is clear format, and then propose scheme, can be incited somebody to action
NSDTF-DEM is converted to the formatted data of three-dimensional information processing software identification.STL(Stereo Lithography) it is 3D
The interface protocol that SYSTEMS company formulates, is a kind of 3-D graphic file format of RP technique service, by
It in its format is simple, professional platform independence is good the advantages that, is widely studied and applied, has become the rapid prototyping defaulted in industry
Standard interface file.To realize NSDTF-DEM data 3D printing, most effective approach be converted into stl file, but
There is no direct switching softwares to come out at present, therefore, it is necessary to find most suitable intermediate conversion software, not only to realize
Correct conversion of the NSDTF-DEM data to STL format, will also guarantee loss of data as small as possible.
3D printing is research hotspot in recent years, and 3D printer on the market emerges one after another, and 3D printing material is also a variety of more
Sample.300 3D printer of Matrix is a kind of using paper as the 3D printer of moulding material, by carrying out to two dimension layering section
Cutting is to realize that each two dimension of 3D model cuts " printing " of layer.Paper is a kind of material that price is relatively low, light weight, colour developing
Property is good, and can meet the requirement of Green Sustainable with recycling and reusing.
Summary of the invention
It is an object of the invention to overcome deficiencies of the prior art, provide a kind of based on NSDTF-DEM data
Paper base 3D printing method.
The purpose of the present invention is achieved through the following technical solutions.
A kind of paper base 3D printing method based on NSDTF-DEM data, it is necessary first to which format is carried out to NSDTF-DEM data
It is converted to the dem data of ArcInfo ASCII Grid format, this method includes the surface modeling of dem data, dem data
The 3D printing of three-dimensional modeling and DEM threedimensional model.
Further, the surface modeling of the dem data is: will be converted to according to raster symbol-base tool first
The height value being amplified in the dem data of ArcInfo ASCII Grid format is reduced to actual size, the data after reduction with
Then the storage of ASC format generates triangle mesh curved surface algorithm using regular grid data and carries out table to the dem data of ASC format
Face modeling, obtains the 3 d surface model of dem data, then stores the 3 d surface model of generation with STL format, with
The three-dimensional modeling of standby dem data uses.
Further, the three-dimensional modeling of the dem data, be guarantee dem data three-dimensional surface do not change
Under conditions of, become three-dimensional surface along the carry out minor shifts (can set, such as 1mm) in elevation direction three-dimensional surface first
At a three-dimensional surface with small thickness, then obtain the three-dimensional surface with small thickness by stretching certain
Height (can set, such as 500mm), become a 3 D stereo, it is described that the upper surface of the 3 D stereo is that protrusion is come
The three-dimensional surface of dem data, the lower surface of the 3 D stereo are the three-dimensional surfaces of the dem data fallen in, finally by cutting
The three-dimensional surface for falling down the dem data that surface is fallen in is cut off, so that the 3 D stereo is obtained smooth lower surface, finally obtains
The threedimensional model of dem data, source file of the DEM threedimensional model as 3D printing, the upper surface of the threedimensional model is
The three-dimensional surface of dem data, front, rear, left and right and lower surface are smooth surface, are played a supportive role to three-dimensional surface.
Further, the 3D printing of the DEM threedimensional model is that the DEM number is carried out by the way of paper base 3D printing
According to the output of threedimensional model, isochoric layering setting is carried out to the threedimensional model of the DEM, using color inkjet printer into
The double-faced color printing of row two dimension layering, cutting and three-dimensional mould using paper base 3D printer to two-dimentional color page progress two-dimensional silhouette
Type building after the completion of 3D printing, strips the paper of redundance, and carries out the coating of water-based glue to threedimensional model surface, with
Obtain the 3D printing model of final dem data.
The 3D printing model that the present invention obtains is by above-mentioned dem data surface modeling, dem data three-dimensional modeling and DEM
The 3D printing model that method described in the technical solution of threedimensional model 3D printing manufactures.
A kind of paper base 3D printing method based on NSDTF-DEM data of the present invention, wherein the conversion of the dem data, is
According to feature of the dem data of NSDTF-DEM format and ArcInfo ASCII Grid format in data structure, to described
The file header and suffix of NSDTF-DEM data are rewritten, and the DEM number of ArcInfo ASCII Grid format is converted into
According to.
A kind of paper base 3D printing method based on NSDTF-DEM data of the present invention, wherein the surface modeling of the dem data
It is that it is bent to generate triangle gridding using regular grid data using the height value being amplified in raster symbol-base tool reduction dem data
The surface modeling of face algorithm progress dem data.Raster symbol-base is completed using the raster symbol-base device tool in ARCGIS software,
ARCGIS is that the GIS platform of the complete set of collection more than the 40 years GIS-Geographic Information System consulting of ESRI company and research and development experience exploitation produces
Product have powerful cartography, spatial data management, spatial analysis, spatial information integration, publication and sharing capability,
Conversion between NSDTF-DEM data and raster data and in the reduction of NSDTF-DEM altitude data, is avoided that data precision
Loss, the dem data after reduction saves as ASC format；It is to utilize that regular grid data, which generate triangle mesh curved surface algorithm,
The 3D conversion module of AccuTrans3D software realizes that AccuTrans3D is 3D model conversion packet under Windows, one light
The tool of magnitude, modeling file format that can be instantly popular with fast reading and writing are converted into triangle grid model, and be stored as
STL format, conversion process fast and stable, loss of significance are small, and are not in the softwares such as Global Mapper in export STL text
When part error, file is invalid or the byte number of file increase severely etc. rough sledding.
A kind of paper base 3D printing method based on NSDTF-DEM data of the present invention, wherein the three-dimensional modeling of the dem data
It is the dimensional support of regular shape to be constructed for three-dimensional surface, because of the three-dimensional table of dem data on the basis of existing three-dimensional surface
Face is non-closed model, it is impossible to be used in 3D printing, the principle are realized by Materialise Magics software.
Materialise Magics provides ideal, perfect software solution for the user using stl file, has advanced
, supermatic STL operating function.Three-dimensional surface is subjected to minor shifts along elevation direction first, makes three-dimensional table mask
There is a small thickness, then so that three-dimensional surface is obtained certain height by stretching, become a 3 D stereo, described three
The three-dimensional upper surface of dimension is the three-dimensional surface for the dem data that protrusion is come, and the lower surface of the 3 D stereo is fallen in
The three-dimensional surface of dem data makes the three-dimensional finally by the three-dimensional surface for cutting away the dem data that lower surface is fallen in
Solid obtains smooth lower surface.The threedimensional model of dem data is finally obtained, the upper surface of the threedimensional model is dem data
Three-dimensional surface, front, rear, left and right and lower surface are smooth surface, are played a supportive role to three-dimensional surface.
Compared with prior art, the present invention having the following advantages that and technical effect: 1) realizing that the 3D of NSDTF-DEM data is beaten
Print；2) NSDTF-DEM data are configured to the threedimensional model of STL format, modeling process fast and stable, conversion accuracy by this method
It is high；3) moulding material used is office A4 paper, without any processing or pretreatment, the glue taste Aqueous Adhesives used, no
Can volatilize pernicious gas, and be conducive to recycling and reusing；4) using the 3D printing process of " subtraction ", it ensure that the every thickness degree of 3D printing
Uniformly, and other backing materials are not needed, saves the print time；5) 3D printing model quality obtained is firm, details is complete,
The fine landform such as mountain peak, mountain valley, river can completely be presented.
Detailed description of the invention
Fig. 1 is the paper base 3D printing method flow diagram based on NSDTF-DEM data in example.
Fig. 2 a is NSDTF-DEM example data logging this opening figure of the present invention.
Fig. 2 b is that NSDTF-DEM of the present invention is converted to the notepad opening figure after ArcInfo ASCII Grid format.
Fig. 3 is the elevation reduction DEM schematic diagram that suffix of the present invention is rewritten as ASC.
Fig. 4 is the DEM three-dimension surface that STL is converted in AccuTrans3D of the present invention.
Fig. 5 is the three-dimension surface of DEM in Materialise Magics of the present invention.
Fig. 6 is the three-dimensional surface schematic diagram that the present invention has 1mm thickness after offset operation.
Fig. 7 is the threedimensional model schematic diagram with 500mm height after drawn operation of the present invention.
Fig. 8 is the threedimensional model schematic diagram that the present invention has smooth lower surface after cutting operation.
Fig. 9 is that elevation of the present invention amplifies the threedimensional model schematic diagram after 8 times.
Figure 10 is the mock-up schematic diagram for the NSDTF-DEM data that present invention printing obtains.
Specific embodiment
Specific implementation of the invention is described further below in conjunction with attached drawing and realization, but implementation and protection of the invention
It is without being limited thereto.
It is further specific to technical solution of the present invention in conjunction with attached drawing with NSDTF-DEM data instance shown in Fig. 2 a
Illustrate, such as Fig. 1, specific implementation step are as follows:
(1) file header of NSDTF-DEM data (see Fig. 2 a) is rewritten as to the lattice of ArcInfo ASCII Grid file header
Formula (see Fig. 2 b), and file suffixes is changed to TXT, in which: yllcorner(txt)=yllcorner(dem)-nrows×
cellsize。
(2) in ARCGIS, the dem data of TXT format is converted into grid first with " ASCII turnstile lattice " tool
Formula recycles " raster symbol-base " tool to restore the height value being amplified in the dem data of grid, and will be after reduction
Dem data saves as grid, the grid dem data after then " grid turns ASCII " tool being utilized to restore elevation
The dem data of TXT format is converted to, its suffix is finally changed to ASC(and sees Fig. 3).
(3) in AccuTrans3D, utilize " convert to 3D " tool that the dem data of ASC format is converted to three
The three-dimensional surface (see figure 4) of angle grid surface form, and by the three-dimensional surface with the storage of STL format.
(4) the DEM three-dimensional surface file (see figure 5) that STL format is opened in Materialise Magics, uses first
Three-dimensional surface along the distance of elevation direction translation 1mm, is made three-dimensional surface become one with small by " offset part " tool
Then the surface (see figure 6) of thickness marks the lower surface of three-dimensional surface and by " Extrude " tool in the way of stretching
(tensile elongation parameter is set as 500mm) constructs physical model (see figure 7), finally utilizes " cut/punch " tool to model
Lower surface is cut, and guarantees the smooth (see figure 8) in physical model lower surface, to have finally obtained 3D printing model
The altitude data of model is amplified 8 times of (see figure 9)s by apparent 3D effect.
(5) isochoric layering is carried out using physical model of the SliceIT software to NSDTF-DEM data to be arranged, generate
Hierarchy number is 293 layers.
(6) 3D printing of NSDTF-DEM data entity model is carried out using 300 3D printer of Matrix, paper is chosen
With a thickness of the finished product A4 paper of 103.2um, the glue that gluing is carried out between two two dimensional slices uses water-based glue.
(7) after printing is completed, extra paper is stripped, surface painting is then carried out to mock-up using water-based glue
Glue finally obtains the paper base 3D printing mock-up (see figure 10) of NSDTF-DEM data.
A kind of paper base 3D printing method based on NSDTF-DEM data of the present invention, wherein the 3D of the DEM threedimensional model is beaten
Print be using etc. the thickness principle of stratification threedimensional model of DEM is layered, pass through paper base 3D printing method export DEM entity
Model.Etc. thickness layering be using SliceIT software, when paper base 3D printing, uses 300 3D printer of Matrix, moulding material
It is the A4 paper that office uses, is not necessarily to any processing or pretreatment.SliceIT software and 300 3D printer of Matrix are mating
It uses, due to the finished product A4 paper that moulding material is 103.2 μ m thicks, so being arranged using isochoric layering, each two
The thickness information that section information corresponds to A4 paper is tieed up, the precision of every layer data reaches 0.103mm, the precision phase with current 3D printing
When the fine detail that can complete geographic information data prints；The printing of each two dimensional slice profile is by printing machine-cut
Knife cuts processing to realize, other backing materials is not needed in print procedure, " printing " mode of this subtraction is relative to current
For 3D printing addition printing type, the uniform of each two-dimentional face thickness not only ensure that, but also save the more time；Often
One two dimensional slice printing has a gluing operation after completing, to guarantee that the final necessary firmness of 3D model, glue are adopted
With Aqueous Adhesives, meet environmentally protective production method；After model printing is completed, the extra paper of non-model area is stripped
, and gluing operation is carried out to model surface using water-based latex, guarantee that model surface is firm, smooth.
Claims (3)
1. a kind of paper base 3D printing method based on NSDTF-DEM data, it is necessary first to carry out format to NSDTF-DEM data and turn
Get the dem data of ArcInfo ASCII Grid format in return, it is characterised in that this method include dem data surface modeling,
The 3D printing of the three-dimensional modeling and DEM threedimensional model of dem data；The surface modeling of the dem data is: first according to grid
The height value being amplified in the dem data for the ArcInfo ASCII Grid format being converted to is reduced to reality by calculating instrument
Then size, the data after reduction generate triangle mesh curved surface algorithm to ASC using regular grid data with the storage of ASC format
The dem data of format carries out surface modeling, the 3 d surface model of dem data is obtained, then by the three-dimensional surface of generation
Model is with the storage of STL format, in case the three-dimensional modeling of dem data uses.
2. the paper base 3D printing method according to claim 1 based on NSDTF-DEM data, it is characterised in that: described
The three-dimensional modeling of dem data is under conditions of guaranteeing that the three-dimensional surface of dem data does not change, first by three-dimensional surface
Deviate along elevation direction, three-dimensional surface is made to become a three-dimensional surface with thickness, is then made by stretching described
Three-dimensional surface with thickness obtains setting height, becomes a 3 D stereo, and the upper surface of the 3 D stereo is that protrusion is come
The dem data three-dimensional surface, the lower surface of the 3 D stereo is the three-dimensional surface of the dem data fallen in, finally
By cutting away the three-dimensional surface for the dem data that lower surface is fallen in, the 3 D stereo is set to obtain smooth lower surface, most
Obtain the threedimensional model of dem data eventually, source file of the DEM threedimensional model as 3D printing, the threedimensional model it is upper
Surface is the three-dimensional surface of dem data, and front, rear, left and right and lower surface are smooth surface, are played a supportive role to three-dimensional surface.
3. the paper base 3D printing method according to claim 2 based on NSDTF-DEM data, it is characterised in that: described
The 3D printing of DEM threedimensional model is that the output of the dem data threedimensional model is carried out by the way of paper base 3D printing, to described
Dem data threedimensional model carries out isochoric layering setting, and the double-faced color of two-dimentional layering is carried out using color inkjet printer
Printing carries out the cutting of two-dimensional silhouette to two-dimentional color page using paper base 3D printer and threedimensional model constructs, after the completion of 3D printing,
The paper of redundance is stripped, and carries out the coating of water-based glue to threedimensional model surface, to obtain the 3D of final dem data
Printer model.
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| JP6876228B2 (en) * | 2016-09-05 | 2021-05-26 | 富士フイルムビジネスイノベーション株式会社 | 3D model creation data generation device and 3D model creation data generation program |
| CN106408662B (en) * | 2016-09-14 | 2019-03-12 | 湖南科技大学 | A kind of STL model modelling approach based on Grid model |
| CN107825701B (en) * | 2017-09-12 | 2019-11-19 | 上海大学 | Based on five axis print platforms without support 3D printing method |
| CN108097562B (en) * | 2017-12-12 | 2020-12-01 | 运城学院 | Paper-based 3D printed wine packaging model surface color brightness optimization method |
| CN108596860A (en) * | 2018-05-10 | 2018-09-28 | 芜湖航飞科技股份有限公司 | A kind of ground point cloud dividing method based on three-dimensional laser radar |
| CN110116565B (en) * | 2019-05-30 | 2021-01-12 | 华南理工大学 | Optimization method for paper-based full-color 3D printing color reproduction |
| CN113724386A (en) * | 2021-08-05 | 2021-11-30 | 甘肃科诺影视科技有限责任公司 | Method for making three-dimensional map |
| CN115394178B (en) * | 2021-09-02 | 2023-11-03 | 中国地质大学（北京） | Manufacturing method of Chinese-blind bilingual labeling tactile map jigsaw teaching aid for special teaching |
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