Research and Application of a Hidden Line Removal Algorithm of Digital Mine

2010 ◽  
Vol 121-122 ◽  
pp. 354-359
Author(s):  
Xue Dong Du ◽  
Shuang Heng Feng
Keyword(s):  
3D Model ◽  
Practical Application ◽  
Digital Mine ◽  
Mine Environment ◽  
Engineering Drawings ◽  
Hidden Line ◽  
Removal Technique

The 3D model of mine transforms into various 2D views with hidden line removal technique, and outputs these 2D views as the standard engineering drawings to guide the production and construction of mine. Due to the complexity and specificity of mine environment, those 2D views that the general blanking algorithms generated have a lot of uncertainties, so they don’t meet the requirements of practical application. In order to meet the requirements of mining applications, according to the characteristics of mine environment, the paper designs and implements a hidden line removal algorithm, and applies it to 2D views automatic generations of digital mine, both the blanking result and accuracy satisfy the requirements of mining applications.

scholarly journals DEVELOPMENT PROSPECTS OF 3D MODELLING IN FORENSIC MEDICINE: BIM-TECHNOLOGY AND 4D MODELLING

2020 ◽  
Vol 6 (1) ◽  
pp. 4-13
Author(s):  
S. V. Leonov ◽  
Yu. P. Shakiryanova ◽  
P. V. Pinchuk
Keyword(s):  
Forensic Medicine ◽  
3D Model ◽  
Three Dimensional ◽  
3D Modelling ◽  
Line Of Sight ◽  
The Finite Element Method ◽  
Practical Application ◽  
Cad Modelling ◽  
Ct Data ◽  
Development Prospects

The present article provides an overview of the main methods of three-dimensional modelling currently used in various fields of science and practice, including forensic medicine. The possibilities of used methods are described.The authors introduce the concept of BIM-technology, which allows various methods working in 3D to be applied comprehensively: from photogrammetry and computed tomography to line-of-sight and CAD modelling. The article presents a case involving practical application of BIM-technology within the practical work of a forensic expert. The possibilities of supplementing and expanding the model over time within a single information field (4D modelling) are shown.Using the example of a specific examination, it is shown for which studies the created BIM-model can be employed, as well as what issues can be solved with its help. To that end, CT data was studied with the subsequent reconstruction of the 3D model of the damaged skull; blood traces were analysed with the subsequent 3D modelling of circumstances at the scene. The following methods were used for the reconstruction: photogrammetry, the finite element method and line-of-sight modelling of gunshot trajectories.Applied within a situational forensic medical examination, BIM-technologies successfully provided answers to the investigator’s questions: mechanism underlying the formation of blood traces; location of the bleeding source; trajectories of projectiles and their elements; circumstances of the occurrence; position of the shooter; prediction of glass breakage caused by a bullet.Conclusion. New computer technologies (BIM-technology and 4D modelling) constitute the next step in the development of three-dimensional modelling. Their introduction into the practice of experts will help create a single information field for all objects under study, as well as consider all possible investigative leads as objectively as possible

scholarly journals Preprocessing of Digitalized Engineering Drawings

2015 ◽  
Vol 9 (13) ◽  
pp. 53
Author(s):  
Matus Gramblicka ◽  
Jozef Vasky
Keyword(s):  
Product Life Cycle ◽  
3D Model ◽  
Digital Manufacturing ◽  
File Format ◽  
Product Model ◽  
Interactive Editing ◽  
Raster Graphics ◽  
Standard Vector ◽  
Engineering Drawings ◽  
Contemporary Practice

<p>The concept of digital manufacturing assumes an application of digital technologies in the whole product life cycle. CAD product model replaced engineering drawing in digital manufacturing. In contemporary practice the engineering paper-based drawings are still archived. They could be digitalized and stored to one of the raster graphics format. After that they could be vectorized for interactive editing in the specific software system or for archiving in some of standard vector graphics file format. The vector format is suitable for 3D model generating too. The article deals with using of methods for preprocessing phase of digitalized engineering drawings vectorization process.</p>

Reverse Design of the Card Buckle Based on Imageware

2015 ◽  
Vol 713-715 ◽  
pp. 291-294
Author(s):  
Shi Gang Wang ◽  
Fan Song Meng ◽  
Yue Han
Keyword(s):  
Image Processing ◽  
Reverse Engineering ◽  
3D Model ◽  
Processing System ◽  
Practical Application ◽  
Engineering Technology ◽  
Development Cycle ◽  
Computer Image Processing ◽  
Critical Technology ◽  
Product Development Cycle

Using reverse engineering technology software, Imageware and UG, and taking the card buckle as a prototype for the practical application of reverse engineering, this article discusses the method of combining reverse engineering with rapid technology. Using optical system to collect images, and then through the computer image processing technology to extract edge contour digital points, using the existing CAD software processing system for the reconstruction of 3D model, and taking a detail analysis of the critical technology of surface reconstruction, using rapid prototyping technology for processing molding, so as to improve the efficiency of product design, shorten the product development cycle. And at last, through the test, we get some usual problems and solve them one by one.

EMBODIMENT OF AUTOMATED DESIGNATION OF SURFACE FINISH OF THE OBJECTS OF THE 3D WORKPIECE MODEL

2020 ◽  
pp. 3-9
Author(s):  
M. S. Chepchurov ◽  
B. S. Chetverikov ◽  
A. N. Maslovskaja ◽  
N. S. Ljubimyj
Keyword(s):  
Surface Finish ◽  
Geometric Modeling ◽  
3D Model ◽  
Geometric Model ◽  
3D Models ◽  
Work Piece ◽  
Electronic Model ◽  
Cad Cam ◽  
Engineering Drawings ◽  
Cross Platform

The article discusses the questions of automation of design engineering in the sphere of the formation of 3D geometric model of work-pieces. The authors have designed and carried out an algorithm in the form of the additional script in the software bundle of the geometric modeling, enabling to execute the designation of surface finish in 3D models. The algorithm is based on the freeware CAD/CAM/CAE system – FreeCAD. The structure of an element from an ordered set of data about a geometric object that identifies the surface roughness is determined that allows to expand the capabilities of methods for providing storage and transmission of data of the electronic model of the product. Creation of additional procedures based on the formed list of surface finish according to the GOST 2.309–73 makes it possible to embody 3D-model transfer to the workplaces. It means that time of embodiment of preproduction and production of work-piece can be cut. Nowadays freeware solid geometry engine with open source code is not used due to the absence of additional specific possibilities of making of engineering drawings according to the regulatory requirements. The authors have offered the method of increasing the capabilities of software bundle of the geometric modeling, which provides the increase of target audience of freeware. The authors propose to use free cross-platform language Python to create the script of designation of surface finish in the space of 3D-model. Usage of the example of the script and its testing can help to design other procedures of making of engineering drawings to create fully-featured free cross-platform geometric designing.

3D Rebuilding for Impeller of Centrifugal Pump Based on ICT

2011 ◽  
Vol 130-134 ◽  
pp. 1114-1118 ◽  
Author(s):  
Xiao Ping Jiang ◽  
Wei Dong Shi ◽  
Wei Li ◽  
Hou Lin Liu ◽  
Ming Gao Tan
Keyword(s):  
Centrifugal Pump ◽  
Volume Rendering ◽  
3D Model ◽  
Object Oriented ◽  
3D Models ◽  
Practical Application ◽  
Pump Impeller ◽  
Input And Output ◽  
Complex Construction

In order to rebuild 3D models for pump impeller, the total inner complex construction data must be obtained at first. With the help of ICT, 367 ICT images with high quality of two typical impellers of centrifugal Pump were collected respectively, and format conversion from RAW to BMP was fulfilled though a developed program. Volume rendering was fulfilled based on these fault images, VC++ 6.0, MFC, ADO, VTK, and a series of digital image processing. A program named ReImpeller3D was developed on reverse engineering for pump impeller. The software is object-oriented and has several input and output interfaces, and also can supply geometrical models for numerical simulation, FEM, RP, digitized production, and redesign to production either. The practical application shows that it is feasible to use volume rendering to rebuild 3D model for pump impeller.

scholarly journals Line Width Recovery after Vectorization of Engineering Drawings

2016 ◽  
Vol 24 (39) ◽  
pp. 43-50
Author(s):  
Matúš Gramblička ◽  
Jozef Vaský
Keyword(s):  
Line Width ◽  
Mechanical Engineering ◽  
3D Model ◽  
Semantic Information ◽  
Line Length ◽  
Variable Number ◽  
Vector Representation ◽  
Software Applications ◽  
Raster Image ◽  
Engineering Drawings

Abstract Vectorization is the conversion process of a raster image representation into a vector representation. The contemporary commercial vectorization software applications do not provide sufficiently high quality outputs for such images as do mechanical engineering drawings. Line width preservation is one of the problems. There are applications which need to know the line width after vectorization because this line attribute carries the important semantic information for the next 3D model generation. This article describes the algorithm that is able to recover line width of individual lines in the vectorized engineering drawings. Two approaches are proposed, one examines the line width at three points, whereas the second uses a variable number of points depending on the line length. The algorithm is tested on real mechanical engineering drawings.

Unified Product Information Modeling Using Model-Based Definition Technology

2012 ◽  
Vol 591-593 ◽  
pp. 837-840 ◽  
Author(s):  
Juan Han ◽  
Fa Ping Zhang ◽  
Bo Gao ◽  
Jing Zhang ◽  
Yun He
Keyword(s):  
3D Model ◽  
Product Information ◽  
Information Modeling ◽  
Information Organization ◽  
High Time ◽  
Common Phenomenon ◽  
Model Design ◽  
Model Based ◽  
Engineering Drawings ◽  
Modern Manufacturing

It is a common phenomenon that 3D model and 2D engineering drawings are widely used together in modern manufacturing scenario. Therefore it makes a lot of extra tasks to do for both of them which lead to such results as high time consuming, labor intensive during the process. The Model-based Definition (MBD) approach is definitely an effective method to solve above problems. To facility the usage of the MBD Technology, this paper introduces two kinds of MBD model (design-MBD, process-MBD), and describes their contents as well. The paper also focuses on constructing the dMBD model and pMBD model from two aspects: information organization and annotation standard so that these models can guide production more effective.

Affordable Photogrammetry as Applied in the 3D Modelling and Monitoring of Underground Mining Exploitation and Transport

2014 ◽  
Vol 683 ◽  
pp. 251-256
Author(s):  
Ivica Ristović ◽  
Milivoj Vulić
Keyword(s):  
Personal Computer ◽  
3D Model ◽  
Underground Mining ◽  
Practical Knowledge ◽  
3D Modelling ◽  
Practical Application ◽  
Photographic Camera ◽  
Mining Geology ◽  
The Future ◽  
The University

The application of photogrammetry, with a particular emphasis on 3D modelling and monitoring, is of interest in the field of underground mining transportation. In the article, a practical assignment concerning the creation of a 3D model with the aid of an ordinary photographic camera and a personal computer, practically conducted by a student with the aid or supervision of a lecturer at the University of Ljubljana, Slovenia, as a part of the academic process that is, in the effort to instil practical knowledge into students, part of pursuing a mining degree, is described in detail, delineating all the procedures involved, any appearing problems, the means to deal with any appearing problems and the means to employ the obtained 3D model in the future. The aim of creating the 3D model was to demonstrate the convenience of applying photogrammetry in the fields of mining, geology and geotechnology, as well as to introduce a tool that is, in terms of its efficiency, relatively poorly represented in Slovenia and, taking into account its affordability along with its efficiency, to consider its practical application in the mining, geological and geotechnological professions.

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