scholarly journals Comparing Virtual Reality and Desktop Interface for Reviewing 3D CAD Models

2019 ◽  
Vol 1 (1) ◽  
pp. 1923-1932 ◽  
Author(s):  
Nikola Horvat ◽  
Stanko Škec ◽  
Tomislav Martinec ◽  
Fanika Lukačević ◽  
Marija Majda Perišić
Keyword(s):  
Virtual Reality ◽  
Spatial Perception ◽  
3D Models ◽  
Evaluation Study ◽  
Sensory Cues ◽  
Interface Elements ◽  
3D Cad ◽  
Cad Models ◽  
Model Size ◽  
Model Review

AbstractUse of virtual reality (VR) is considered beneficial for reviewing 3D models throughout product design. However, research on its usability in the design field is still explorative, and previous studies are often contradictory regarding the usability of VR for 3D model review. This paper argues that the usability of VR should be assessed by analysing human factors such as spatial perception and taking into consideration the complexity of the reviewed product. Hence, a comparative evaluation study has been conducted to assess spatial perception in desktop interface-based and VR-based review of 3D models of products with different levels of complexity. The results show that participants in VR more could perceive the fit of user interface elements, and estimation of the model dimensions had a lower relative error than in desktop interface. It has been found that various sensory cues are used to perceive the model size and that the employed sensory cues depend on the level of complexity. Finally, it is proposed that differences between a desktop interface and VR for reviewing models are more evident when reviewing models of higher complexity levels.

Shape Comparison of 3D Models Based on Features and Parameters

2008 ◽  
Author(s):  
Karthik Viswanathan ◽  
Sagar Chowdhury ◽  
Zahed Siddique
Keyword(s):  
Computer Aided Design ◽  
Product Family ◽  
3D Models ◽  
3D Cad ◽  
Solid Models ◽  
Cad Models ◽  
3D Solid ◽  
Aided Design ◽  
Distinct Features ◽  
Common Platform

Computer-Aided Design (CAD) is used extensively during mechanical product design, which involves creating 3D models of components and then assembling them into modules and systems. Methods and tools to compare components and identify a common platform using these 3D CAD models of components would facilitate faster specification of product family architecture. Hence, there is a need to develop means for comparing component geometry, in order to identify the common and distinct features, determine component commonality, and identify a common platform for the set of components. This paper presents an approach to determine geometric commonality between components from their 3D solid models. The approach consists of performing a pair-wise comparison between components. To measure commonality for a pair of components, first all feature-pair’s dimensions and positions are measured, which then combined to give the overall component-pair commonality.

Evaluating the Impact of Virtual Reality on Mechanical Design Education

2009 ◽  
Author(s):  
Margherita Peruzzini ◽  
Maura Mengoni ◽  
Michele Germani
Keyword(s):  
Virtual Reality ◽  
Design Education ◽  
Mechanical Design ◽  
Design Activity ◽  
Innovative Teaching ◽  
3D Cad ◽  
Technological Advances ◽  
Cad Models ◽  
Definition Of ◽  
The Impact

The promise of Virtual Reality in design environments is to facilitate the interaction with digital models and to enhance the results of design activity. Design education is one of the most recent and interesting applications. Thanks to technological advances in human-computer interfaces, Virtual Reality represents a new way to stimulate design students and to develop innovative teaching methods. The paper explores the impact of Virtual Reality technologies on design learning, with particular attention to mechanical product design. It is focused on the analysis of cognitive and technical aspects of learning processes and the definition of a proper evaluation protocol. The protocol is based on the classification of the most meaningful activities in mechanical engineering teaching and the identification of a set of metrics that enable to objectively evaluate the learning process. Assessing how VR supports design education, an experimental study is proposed. It is based on the comparison of three different approaches performed by two-dimensional drawings, by 3D CAD models and, finally, by virtual reality technologies.

scholarly journals Virtual Reality Application of the Fortress Al Zubarah in Qatar Including Performance Analysis of Real-Time Visualisation

2021 ◽  
Author(s):  
Thomas Kersten ◽  
Daniel Drenkhan ◽  
Simon Deggim
Keyword(s):  
Virtual Reality ◽  
Real Time ◽  
Virtual Worlds ◽  
3D Models ◽  
Frame Rate ◽  
Computer Hardware ◽  
Head Mounted Display ◽  
Digital World ◽  
Cad Models ◽  
Game Engines

AbstractTechnological advancements in the area of Virtual Reality (VR) in the past years have the potential to fundamentally impact our everyday lives. VR makes it possible to explore a digital world with a Head-Mounted Display (HMD) in an immersive, embodied way. In combination with current tools for 3D documentation, modelling and software for creating interactive virtual worlds, VR has the means to play an important role in the conservation and visualisation of cultural heritage (CH) for museums, educational institutions and other cultural areas. Corresponding game engines offer tools for interactive 3D visualisation of CH objects, which makes a new form of knowledge transfer possible with the direct participation of users in the virtual world. However, to ensure smooth and optimal real-time visualisation of the data in the HMD, VR applications should run at 90 frames per second. This frame rate is dependent on several criteria including the amount of data or number of dynamic objects. In this contribution, the performance of a VR application has been investigated using different digital 3D models of the fortress Al Zubarah in Qatar with various resolutions. We demonstrate the influence on real-time performance by the amount of data and the hardware equipment and that developers of VR applications should find a compromise between the amount of data and the available computer hardware, to guarantee a smooth real-time visualisation with approx. 90 fps (frames per second). Therefore, CAD models offer a better performance for real-time VR visualisation than meshed models due to the significant reduced data volume.

Enhancing Model Reuse Through 3D Annotations: A Theoretical Proposal for an Annotation-Centered Design Intent and Design Rationale Communication

2013 ◽  
Author(s):  
Jorge Dorribo-Camba ◽  
Gerardo Alducin-Quintero ◽  
Pascual Perona ◽  
Manuel Contero
Keyword(s):  
3D Models ◽  
Design Rationale ◽  
Design Intent ◽  
Data Annotation ◽  
3D Cad ◽  
Cad Models ◽  
The Impact ◽  
Theoretical Proposal

The long term goals of this research are to study the effectiveness of CAD 3D annotation techniques to support the explicit communication of design intent and rationale, and to analyze the impact of the annotations in the alteration and reutilization of 3D models in a product design context. Towards these goals, we are initially examining the formal annotation practices defined by model-based standards such as ASME Y14.41-2012 and ISO 16792:2006, and their implementation in current CAD systems. This paper presents a prototype implementation of a module to automatically extract textual information from annotated 3D CAD models. Automated extraction of data annotation can be used to analyze both the content and the quality of the annotations with the purpose of determining what makes annotations effective and ultimately communicating design intent. The architecture of a system designed to manage and manipulate this information is also described and analyzed.

Research of Slicing CAD Models with Pro/TOOLKIT for Integral Stereolithography

2011 ◽  
Vol 321 ◽  
pp. 226-229
Author(s):  
Guang Shen Xu ◽  
Tian You Jing
Keyword(s):  
3D Models ◽  
High Accuracy ◽  
3D Cad ◽  
System A ◽  
Direct Slicing ◽  
Section Profile ◽  
Cad Models ◽  
Slicing Method ◽  
Tower Model ◽  
Image Format

According to the requirements of integral Stereolithography (integral SL) System, a new direct slicing method under Pro/ENGINEER environment is developed. 3D CAD models are sliced with Pro/TOOLKIT in Pro/ENGINEER environment, and section image of 3D models can be obtained and saved as image format. Dynamic masks are produced with the cross-section images which obtained through the slicing method by dynamic pattern generator, and then 3D real prototyping is fabricated conveniently with integral SL System. A 3D tower model is sliced with this method, and the tower prototyping also is fabricated with integral SL System. Compared with the STL format files slicing method, the new slicing method can achieve high accuracy of layer section profile. The direct slicing method provides a new solution for integral SL system to build objects with high accuracy.

Evaluation of CAD Model Manipulation in Desktop and Multimodal Immersive Interface

2013 ◽  
Vol 325-326 ◽  
pp. 289-293
Author(s):  
Florin Gîrbacia
Keyword(s):  
Evaluation Study ◽  
Direct Access ◽  
Cad Model ◽  
Multimodal Interface ◽  
Space Model ◽  
3D Cad ◽  
3D Objects ◽  
Software Interface ◽  
Cad Models ◽  
Tracking Device

In this paper is presented an evaluation study regarding the manipulation of 3D CAD models using multimodal Virtual Reality (VR) interface and traditional desktop environment. A multimodal interface based on VR technologies that offers direct access to the space model by using several sensorial channels (visual, tactile, verbal) is described. Users can manipulate 3D objects using 6DOF tracking device, gestures and visualize the design status in an immersive CAVE - like system. The results of the evaluation study illustrate that using VR technologies as an alternative to replace WIMP CAD software interface is viable and brings more advantages.

An Agent Based Framework to Automatically Generate 3D CAD Models of Customer Specified Products

2003 ◽  
Author(s):  
Zahed Siddique ◽  
Karunakar Reddy Boddu
Keyword(s):  
Mass Customization ◽  
3D Model ◽  
Product Information ◽  
3D Models ◽  
The Internet ◽  
Agent Based ◽  
User Input ◽  
3D Cad ◽  
Design And Manufacturing ◽  
Cad Models

To survive in today’s volatile market, companies are striving to deliver greater quality, more customization, faster response, more innovative designs and lower prices. The new shift in the current market has introduced the concept of mass customization. One of the aspects of mass customization is to provide customers with products that are manufactured to their needs and requirements. To provide such a support requires better integration of customer with different stages of design and manufacturing. Expansion of the Internet provides an opportunity for such an integration, which will need to link design and manufacturing of the company with the customer. In current approaches, customer usually specifies the options and gets the price or simple pictures of the object. In this paper a system is presented, where customer options and size parameters are gathered using the Internet and is used to automatically generate 3D CAD model of the product and then display the 3D model to the customer for feedback. Development of a framework to generate 3D models from user input will require maintaining explicit correspondence among various types of product information from a module perspective. The Internet based system presented in this paper uses templates to automatically generate 3D CAD models of components, assemble them into products and then export VRML files that are displayed to the customer.

User Generated Content for Site Based Training in Virtual Reality

2021 ◽  
Author(s):  
Ivory Mayhorn ◽  
Kyle R. Daughtry ◽  
Athicha Dhanormchitphong ◽  
Mitchell B. Bray
Keyword(s):  
Virtual Reality ◽  
Training Model ◽  
Project Planning ◽  
Value Capture ◽  
3D Cad ◽  
Response Planning ◽  
Before And After ◽  
Global Projects ◽  
Cad Models ◽  
Specific Operator

Abstract Objectives/Scope Through a partnership with Global Projects and the ExxonMobil IT, we set out to change the way enabling enhanced site specific operator training and model reviews are done on large complex models. The concept was to have the ability to view and navigate complex green-field 3D CAD models in VR (virtual reality) technology to aid in training, model reviews, procedure development, rounds development, maintenance planning and execution, emergency response planning / drills, and project planning. The automated toolset can be used to conduct model reviews followed by training and preparing operators for commissioning before and after site construction is completed. Methods, Procedures, Process Leveraging the 3D CAD files from Engineering Procurement & Construction (EPC) contractors, the feature set allows the ability to create a fully textured 3D Model walk-through (annotated model review), and a content creation application to easily create user generated training scenarios (similar to PowerPoint drag and drop). In the past few months, 20 onsite stations were setup and over 100 first and second line supervisors and operators leveraged the toolset. Baseline metrics were captured with an overwhelming success. Ongoing metrics collections will continue for several months to drive further adjustments on the toolset to ensure high value capture. This toolset, once fully refined, will allow other capital & global projects the ability to train operators prior to the unit being built and ongoing for operations activities bringing pieces of the Digital Twin concept to life. Results, Observations, Conclusions Technical Benefits Business Benefit Novel/Additive Information

Intuitive 3D Computer-Aided Design (CAD) System With Multimodal Interfaces

2013 ◽  
Author(s):  
V. G. Nanjundaswamy ◽  
Amit Kulkarni ◽  
Zhuo Chen ◽  
Prakhar Jaiswal ◽  
Sree Shankar S. ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Brain Computer Interface ◽  
3D Models ◽  
Multimodal Interfaces ◽  
Computer Interface ◽  
Cad Modeling ◽  
3D Cad ◽  
Cad System ◽  
Cad Models ◽  
Aided Design

The existing interfaces for 3D CAD modeling softwares use 2D subspace inputs such as x and y axes of mouse to create 3D models. These existing interfaces are inherently modal because one needs to switch between subspaces, and disconnects the input space from modeling space. This makes existing interfaces tedious, complex, non-intuitive and difficult to learn. In this paper, a multi-sensory, interactive, and intuitive 3D CAD modeling interface is presented to address these shortcomings. Three different modalities (gestures, brain-computer interface, and speech) have been used for creating interactive and intuitive 3D CAD modeling interface. DepthSense® camera from SoftKinetic is used to recognize gestures, EEG Neuro-headset from Emotiv® is used for acquiring, and processing neuro-signals and CMU Sphinx is used for recognizing and processing speech. Multiple CAD models created by several users using the proposed multi-modal interface are presented. In conclusion, the proposed system is easier to learn and use as compared to the already existing systems.

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