Application of Digital Close Range Photogrammetry in Mechanical Three-Dimensional Modeling

2011 ◽  
Vol 189-193 ◽  
pp. 1973-1977
Author(s):  
Hu Zhao ◽  
San Gen Wang ◽  
Da Ke Wu
Keyword(s):  
3D Model ◽  
Mechanical Design ◽  
Three Dimensional ◽  
Complex Surface ◽  
Close Range Photogrammetry ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Close Range ◽  
Design Software ◽  
Set Up

It is usually a time-consuming process to set up three-dimensinal(3D) model of mechanical components with complex surface. In order to solve the problem, this paper adopts consumer cameras and the technique of digital close range photogrammetry ( DCRP ) to establish 3D model, and export the data to 3D mechanical design software (SolidWorks) for further simulation and reconstruction. This method has been proved very effective in practise.

Design of the Globoidal Cam Mechanism Based on MATLAB and CATIA

2014 ◽  
Vol 716-717 ◽  
pp. 720-723
Author(s):  
Chao Zhang ◽  
Zhi Hong Zhang
Keyword(s):  
Three Dimensional ◽  
Complex Surface ◽  
3D Design ◽  
Cam Mechanism ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Geometric Size ◽  
Cam Profile ◽  
Design Software ◽  
Contour Surface

Working profile of Globoidal indexing cam is a complex surface. 2D mechanical drawing is difficult to describe it clearly. With the development of computer technology, the 3D design software such as CATIA, Pro-E, Solidworks, UG/NX, the solid and surface function of them make productions more excellent. Globoidal indexing cam profile equations firstly was studied, the geometric size of the globoidal indexing cam mechanism was calculate, and then use MATLAB to calculate the globoidal indexing cam contour surface 3D coordinates of points, finally completed the three-dimensional modeling of globoidal indexing cam in CATIA.

Three-Dimensional Modeling of Container Cranes

2013 ◽  
Author(s):  
Andrea Arena ◽  
Arnaldo Casalotti ◽  
Walter Lacarbonara ◽  
Matthew P. Cartmell
Keyword(s):  
3D Modeling ◽  
3D Model ◽  
Initial Conditions ◽  
Three Dimensional ◽  
Container Cranes ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Time Marching ◽  
Constrained Model ◽  
2D And 3D

This work deals with three-dimensional (3D) modeling of container cranes including the hoisting cable length commands. The proposed models allow to effectively study the 3D motion caused by the eccentricity of initial conditions or loading conditions such as those induced by wind. The container is modeled as a 3D rigid body while the hoisting cables are treated either as inextensible trusses or as linearly elastic straight, taut cables. The 3D model with inextensible cables is shown to coalesce into existing two-dimensional models under the relevant planarity constraints. Details about the treatment of the internal inextensibility constraints are discussed. Time-marching simulations are carried out to show representative 2D and 3D responses to initial conditions and commanded motion of the trolley. The main differences between the constrained model and that with the elasticity of the cables are highlighted in the framework of a few significant design scenarios.

Three-Dimensional Recognition Technology for Rare English Words

2014 ◽  
Vol 644-650 ◽  
pp. 4121-4124
Author(s):  
Qiang Chen ◽  
Li Mei Xu
Keyword(s):  
3D Modeling ◽  
3D Model ◽  
Parallel Evolution ◽  
Three Dimensional ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
3D Data ◽  
Evolution Computation ◽  
Fitting In ◽  
The Relationship

This paper mainly studies modeling and recognition of 3D English words’ images. With the development of secondary modeling, segmentation and recognition theories and the application of evolution computation in 3D modeling and recognition, this paper analyzes the issues of parameter fitting in the 3D model, multi-object scene segmentation and parts recognition aiming at the 3D data features in the English words. The 3D model is used as the primitives part to model and segment the scenes and the group parallel evolution and the relationship matching theories are introduced into the 3D modeling and recognition to deeply identify the rare English words’ images. The paper searches for a practical and efficient three-dimensional modeling and identification scheme.

scholarly journals Agustín de Betancourt’s Optical Telegraph: Geometric Modeling and Virtual Reconstruction

2020 ◽  
Vol 10 (5) ◽  
pp. 1857 ◽  
Author(s):  
José Ignacio Rojas-Sola ◽  
Eduardo De la Morena-De la Fuente
Keyword(s):  
3D Modeling ◽  
Geometric Modeling ◽  
3D Model ◽  
18Th Century ◽  
Three Dimensional ◽  
Assembly System ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Virtual Reconstruction ◽  
History Of

This article shows the geometric modeling and virtual reconstruction of the optical telegraph by Agustín de Betancourt and Abraham Louis Breguet developed at the end of the 18th century. Autodesk Inventor Professional software has been used to obtain the three-dimensional (3D) model of this historical invention and its geometric documentation. The material for the research is available on the website of the Betancourt Project of the Canary Orotava Foundation for the History of Science. Thanks to the three-dimensional modeling performed, it has been possible to explain in detail both its operation and the assembly system of this invention in a coherent way. After carrying out its 3D modeling and functional analysis, it was discovered that the transmissions in the telegraph were not performed by hemp ropes but rather by metal chains with flat links, considerably reducing possible error. Similarly, it has also been found that the use of the gimbal joint facilitated the adaptability of the invention to geographical areas where there was a physical impediment to the alignment of telegraph stations. In addition, it was not now necessary for the telescope frames to be located parallel to the mast frame (frame of the indicator arrow) and therefore they could work in different planes.

scholarly journals A Simple Generation Technique of Complex Geotechnical Computational Model

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Hang Lin ◽  
Taoying Liu ◽  
Jiangteng Li ◽  
Ping Cao
Keyword(s):  
Program Implementation ◽  
Three Dimensional ◽  
Mine Design ◽  
Transformation Technique ◽  
Generation Technique ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Design Software ◽  
The Relationship ◽  
Calculation Software

Given that FLAC3D (a geotechnical calculation software) is difficult to use for building large, complex, and three-dimensional mining models, the current study proposes a fast and a convenient modeling technique that combines the unique advantages of FLAC3D in numerical calculation and those of SURPAC (a mine design software) in three-dimensional modeling, and the interface program was compiled. First, the relationship between the FLAC3D and the SURPAC unit data was examined, and the transformation technique between the data was given. Then, the interface program that transforms the mine design model to calculate the model was compiled using FORTRAN, and the specific steps of the program implementation were described using a large iron and copper mine modeling example. The results show that the proposed transformation technique and its corresponding interface program transformed the SURPAC model into the FLAC3D model, which expedited FLAC3D modeling, verified the validity and feasibility of the transformation technique, and expanded the application spaces of FLAC3D and SURPAC.

Method of Detection for Complex Surfaces Based on Industrial Close-Range Photogrammetry

2013 ◽  
Vol 787 ◽  
pp. 944-946
Author(s):  
Li Zhong Wang ◽  
Dong Dong Zhang ◽  
Jin Liang ◽  
Xiao Bo Liao
Keyword(s):  
Measurement System ◽  
Rapid Detection ◽  
Manufacturing Industry ◽  
Detection Method ◽  
Optical Measurement ◽  
Three Dimensional ◽  
Complex Surface ◽  
Close Range Photogrammetry ◽  
Close Range ◽  
Measurement Principle

The rapid detection of the large complex surface was researched with the development of China's manufacturing industry. A industrial close-range photogrammetry new detection Method was put forward based on the analysis of three-dimensional optical measurement principle. The experiment results verify that the accuracy of the three-dimensional optical measurement system independently developed by Xi'an Jiao Tong University meets the Engineering requirements. The main characteristics of large workpiece can be clearly measured and the detection method can be easily used at the production site.

The Influence of Bolt Layout Form to the Dynamic Stiffness of the Column

2014 ◽  
Vol 577 ◽  
pp. 222-227
Author(s):  
Chen Shen ◽  
Zhong Ping Hua ◽  
Meng Sha Zhang ◽  
Zhou Zhang
Keyword(s):  
Natural Frequency ◽  
Dynamic Stiffness ◽  
Three Dimensional ◽  
Element Analysis ◽  
Three Dimensional Modeling ◽  
Lower Natural Frequency ◽  
Dimensional Modeling ◽  
Modeling Software ◽  
Set Up ◽  
Bolt Arrangement

In the case of the column materials to determined, the lower natural frequency of column is determined by the number of coupling bolts and bolt arrangement. In this paper, by three-dimensional modeling software of Solidwork column model of hobbing is set up, then by using ANSYS finite element analysis software. The initial four order natural frequency to the different number of connection bolts and the different arrangement of bolt are respectively calculated. After the initial four order natural frequency are contrasted, we conclude that in the case of merely considering dynamic stiffness this study reach it is the most reasonable to select 8-12 bolts in the hobbing of YKQ31300, and different bolt arrangement of effects on the dynamic stiffness of the column is very small and can be ignored.

Three-Dimensional Modeling Design on Multifunctional Office Chair for Fitness on Solidworks

2013 ◽  
Vol 655-657 ◽  
pp. 245-248
Author(s):  
Qing Quan Li ◽  
Hai Tao Wu ◽  
Hong Bin Liu ◽  
Jie Liu
Keyword(s):  
3D Modeling ◽  
3D Model ◽  
Three Dimensional ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Modeling Software ◽  
Design Requirements ◽  
Office Chair

Established the model of multifunctional office chair for fitness, using 3D modeling software Solidworks, finished the 3D model of parts and parts assembly according to the design requirements of multifunctional office chair, visually and efficientlly. Importantly, this chair is the combination of fitness and massage function. So it is practical and cnvenient to the office crowd.

Using 3D Scanning Techniques in Orthopedic Systems Modeling

2017 ◽  
Vol 15 (13) ◽  
pp. 41-47 ◽  
Author(s):  
Mihai-Constantin Balaşa ◽  
Ştefan Cuculici ◽  
Cosmin Panţu ◽  
Simona Mihai ◽  
Alexis-Daniel Negrea ◽  
...  
Keyword(s):  
Reverse Engineering ◽  
Human Body ◽  
3D Model ◽  
Three Dimensional ◽  
Orthopedic Implants ◽  
3D Scanning ◽  
Specialized Software ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Modeling Techniques

AbstractDesigning orthopedic implants with a long lifespan is essential for improving patients’ quality of life. It is necessary to develop new products with a high degree of personalization for the human body. Physicians and engineers analyzed the geometry and behavior of healthy joints’ motion under specific load conditions as well as the behavior over time and lifetime of orthopedic implants fitted to patients to improve their quality. The paper presents the way in which three-dimensional modeling techniques using specialized software (Catia, SolidWorks) can be combined with reverse engineering techniques (3D scanning) to optimize the design of orthopedic implants. The design of an implant consists of its three-dimensional modeling, as well as simulation of its integration into the human body, in order to analyze its behavior during motion. Therefore, it is necessary not only to 3D model the parts that make up the implant itself, but also to 3D model the bone to which the implant will be fitted. The paper highlights the complementarity of the classic modeling techniques with the reverse engineering techniques, which is necessary because the design of the parts that make up the implant itself can be achieved by specialized software modeling techniques, while the bones, having complex geometries, are better suited to 3D Modeling by scanning.

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