Augmenting Product Development with Virtual Reality
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1 Topic: VR in Product Development IPROD Sofia Meeting 1 TECHNICAL UNIVERSITY OF SOFIA Augmenting Product Development with Virtual Reality 2014 Prof. Stoyan Maleshkov Faculty of German Engineering and Industrial Management Education
2 Topic: VR in Product Development IPROD Sofia Meeting 2 Presentation Outline 1. What is Virtual Reality? 2. VR historical overview. 3. Structure and basic principles of VR systems. 4. Types of VR systems. 5. Main application areas of VR systems. 6. VR application projects at the VR lab of the technical university of Sofia. 7. VR in product design education at the Faculty of German Engineering and Industrial Management Education, TU - Sofia.
3 Topic: VR in Product Development IPROD Sofia Meeting 3 What is Virtual Reality? Virtual Reality (VR) is an environment that is simulated by a computer, trying to imitate the real space. Most virtual reality environments are primarily visual experiences: Displayed either on a computer screen, through special stereoscopic displays or other displays Sound through speakers or headphones Some simulations include additional sensory information Limited tactile feedback etc. «French Higher School L École de design Nantes Atlantique offers master program Virtual Reality Courses are presented in English
4 Topic: VR in Product Development IPROD Sofia Meeting 4 VR Definition Commonly it could be referred to a high-end user-computer interface that involves real-time simulation and interactions through multiple sensorial channels [Burdea, 2003]. VR is based on so called 3 I s : 1. Immersion, 2. Interaction, and 3. Imagination.
5 Topic: VR in Product Development IPROD Sofia Meeting 5 VR Main Elements 1. Immersion - VR applications give users a sense of immersion into some sort of virtual space. This space can model physically existing reality, or be something entirely fictitious. ( vrca.rwth-aachen.de)
6 VR Main Elements 2. Interaction the virtual objects in the virtual environment can be selected and manipulated in a manner equal or very close to those in an natural environment. 3. Imagination the computer generated environment stimulates the imagination of the user the VR system can be considered as some sort of CAI equipment (CAI stands not for Computer Aided Instruction but rather for Computer aided Imagination) ( Topic: VR in Product Development IPROD Sofia Meeting 6
7 VR Definition Virtual Reality (VR) is an environment that is simulated by a computer, trying to imitate the real surroundings to create a realistic-looking world, a believable computer-generated experience. Engage multiple channels and stimulate several senses: Visual presentation, displayed either on a computer screen, through special stereoscopic displays or other displays Sound through speakers or headphones Some simulations include additional sensory information Limited tactile feedback etc. Topic: VR in Product Development IPROD Sofia Meeting 7
8 Topic: VR in Product Development IPROD Sofia Meeting 8 Traditional work with computer Test of Bill Buxton: Draw in 15 sec computer About 80 % draw screen, keyboard and mouse. The user implements the computer basically through input/output technologies.
9 Topic: VR in Product Development IPROD Sofia Meeting 9 Development of the computer Hardware Moore s Low Double the performance every 18 months
10 Development of the potentials of the human s brain Topic: VR in Product Development IPROD Sofia Meeting 10 constant Need to improve the interface HCI
11 Standard HCI (Human Computer Interface) Unchanged during the last 25 years Based on Windows, Icons, Menus and Pointers. WIMP (Windows, Icons, Menus and Pointers) Only screen resolution increases the basic principle remains unchanged. Topic: VR in Product Development IPROD Sofia Meeting 11
12 Standard HCI (Human Computer Interface) Topic: VR in Product Development IPROD Sofia Meeting 12 Technology for people with: one eye one ear one hand one finger without mouth without body
13 VR New challenges How to develop HCI? Not only WIMP. Immersion be in the environment increase this feeling through additional sensorial channels. ( Topic: VR in Product Development IPROD Sofia Meeting 13
14 Topic: VR in Product Development IPROD Sofia Meeting 14 VR Basic features: Virtual content Immersion Real time feedback Interaction Imagination
15 Topic: VR in Product Development IPROD Sofia Meeting 15 VR Main Advantage Old China s proverb: Hear Forget See Memorize Examine Understand 老 子 Laozi 6 BC. Virtual Environment makes it possible to examine the simulated environment and to test and to verify its properties in near-to-natural conditions.
16 Topic: VR in Product Development IPROD Sofia Meeting 16 Augmented Reality Real environment enriched with computer generated objects
17 Topic: VR in Product Development IPROD Sofia Meeting 17 Augmented Reality - Technologyies Two basic principles: optical seethrough - left video seethrough - right
18 Topic: VR in Product Development IPROD Sofia Meeting 18 Augmented Reality - Applications Virtual commercial Text Pacific Bell и Pennsylvania Lottery is AR.
19 Topic: VR in Product Development IPROD Sofia Meeting 19 VR - Historical Overview First Generation: Morton Heilig Sensorama (1962)
20 Topic: VR in Product Development IPROD Sofia Meeting 20 VR - Historical Overview First Generation: Ivan Sutherland, Ultimate Display (1970)
21 Topic: VR in Product Development IPROD Sofia Meeting 21 Presentation Outline 1. What is Virtual Reality? 2. VR historical overview. 3. Structure and basic principles of VR systems. 4. Types of VR systems. 5. Main application areas of VR systems. 6. VR application projects at the VR lab of the technical university of Sofia. 7. VR in product design education at the Faculty of German Engineering and Industrial Management Education, TU - Sofia.
22 Topic: VR in Product Development IPROD Sofia Meeting 22 VR - Historical Overview Second Generation: Scott Fisher,VIEW (1985) First Commercial Systems
23 Topic: VR in Product Development IPROD Sofia Meeting 23 VR - Historical Overview Second Generation: First Applications Game with Data glove and HMD (Head Mounted Display)
24 Topic: VR in Product Development IPROD Sofia Meeting 24 VR - Historical Overview Second Generation: First Applications Virtual walk-through
25 Topic: VR in Product Development IPROD Sofia Meeting 25 VR - Historical Overview Second Generation: First Applications Surgery simulations
26 Topic: VR in Product Development IPROD Sofia Meeting 26 VR - Historical Overview Third Generation: Summary: -Graphics supercomputers SGI - Immersive Projection Technology - IPT -Industrial Applications Example: CAVE (Cave automatic virtual environment)
27 Topic: VR in Product Development IPROD Sofia Meeting 27 VR - Historical Overview Third Generation: Stereoscopic projection Workbench CAVE (Cave Automatic Virtual Environment)
28 Topic: VR in Product Development IPROD Sofia Meeting 28 VR - Historical Overview Third Generation: Marker based AR System
29 Topic: VR in Product Development IPROD Sofia Meeting 29 VR - Historical Overview Forth Generation : today Summary: - Mobile AR system. - Various, but expensive Software tools.
30 Topic: VR in Product Development IPROD Sofia Meeting 30 VR - Historical Overview Fourth Generation: today Summary: - Hardware components are available: PC clusters, stereoscopic visualization, sensors -Missing standards -Missing standard workflow
31 The 4DX Technology old idea in a new implementation Developed by CJ 4DPLEX, functionality quite close to Sensorama ( cj4dx.com) Topic: VR in Product Development IPROD Sofia Meeting 31
32 Topic: VR in Product Development IPROD Sofia Meeting 32 Presentation Outline 1. What is Virtual Reality? 2. VR historical overview. 3. Structure and basic principles of VR systems. 4. Types of VR systems. 5. Main application areas of VR systems. 6. VR application projects at the VR lab of the technical university of Sofia. 7. VR in product design education at the Faculty of German Engineering and Industrial Management Education, TU - Sofia.
33 Topic: VR in Product Development IPROD Sofia Meeting 33 VR Structure Traditional structure [Burdea and Coiffet ]
34 Conceptual model of VR system Topic: VR in Product Development IPROD Sofia Meeting 34
35 Topic: VR in Product Development IPROD Sofia Meeting 35 Conceptual model of VR system Virtual world description, storage and representation of the virtual world, mainly in the form of the so-called Scene Graph.
36 Topic: VR in Product Development IPROD Sofia Meeting 36 Conceptual model of VR system Simulation processor simulates the behavior of the objects in the virtual world usually scripts, describing the behavior are activated when some event occurs.
37 Topic: VR in Product Development IPROD Sofia Meeting 37 Conceptual model of VR system Input processor signals acquisition and processing.
38 Topic: VR in Product Development IPROD Sofia Meeting 38 Conceptual model of VR system Output processor calculating of all output signals (rendering): the scene graph is traversed and all output signals are calculated, generated and transferred to the output displays.
39 Topic: VR in Product Development IPROD Sofia Meeting 39 VR Structure The VR system is a multimodal (multisensory) system. The VR system stimulates user senses for: Vision stereoscopic image (the user can estimate the 3- rd dimension the depth) Hearing space sound (taking into account reflection and absorption of the sound waves by objects in the virtual scene) Touching with and without force feedback
40 Topic: VR in Product Development IPROD Sofia Meeting 40 Stereoscopic image the basic principle Our brain combines: 2 slightly different images, delivered to the brain by the left and the right eye respectively
41 Topic: VR in Product Development IPROD Sofia Meeting 41 Stereoscop Basic principle: to show 2 slightly different images separately to both eyes of the user
42 Topic: VR in Product Development IPROD Sofia Meeting 42 Stereoscopic basics Parallax: an apparent displacement or difference in the apparent position of an object viewed along two different lines of sight.
43 Topic: VR in Product Development IPROD Sofia Meeting 43 Stereoscopic basics Parallax: an apparent displacement or difference in the apparent position of an object viewed along two different lines of sight.
44 Topic: VR in Product Development IPROD Sofia Meeting 44 Stereoscopic basics Parallax and convergence (angle between optical axes of both eyes this information is processed by our brain and the depth (the distance to the observed object) is estimated
45 Topic: VR in Product Development IPROD Sofia Meeting 45 Stereoscopic basics The differences in the two retinal images are called horizontal disparity, retinal disparity, or binocular disparity
46 Topic: VR in Product Development IPROD Sofia Meeting 46 Stereoscopic clues Motion Parallax
47 Topic: VR in Product Development IPROD Sofia Meeting 47 Adding Sound Three Stages: Modeling, Propagation, Rendering Acoustic Geometry -- surface simplification Acoustic Material -- absorption coefficient -- scattering coefficient Source Modeling -- area source -- emitting characteristics -- sound signal Specular Reflection Scattering Diffraction Refraction Doppler Effect Attenuation Interference Late Reverberation Personalized HRTFs for 3D sound Digital Signal Processing Interpolation for Dynamic Scenes Modeling Propagation 3D Audio Rendering
48 Topic: VR in Product Development IPROD Sofia Meeting 48 Adding Sound Three Stages: Modeling, Propagation, Rendering Modeling materials and sound sources Visual Geometry Acoustic Geometry
49 Topic: VR in Product Development IPROD Sofia Meeting 49 Adding Sound Three Stages: Modeling, Propagation, Rendering Sound in computer games: Obstructions: Direct path is muffled, Reflections are clear Occlusion: Direct path is muffled, Reflections are muffled Exclusions: Direct path is clear, Reflections are muffled
50 Topic: VR in Product Development IPROD Sofia Meeting 50 Adding Sound Three Stages: Modeling, Propagation, Rendering
51 Topic: VR in Product Development IPROD Sofia Meeting 51 Haptics Haptic devices : with and without force feedback Phantom desktop haptics device - 6DOF
52 Topic: VR in Product Development IPROD Sofia Meeting 52 Haptics Haptic devices : with and without force feedback CyberTouch data input device from Virtual Technologies
53 Topic: VR in Product Development IPROD Sofia Meeting 53 Presentation Outline 1. What is Virtual Reality? 2. VR historical overview. 3. Structure and basic principles of VR systems. 4. Types of VR systems. 5. Main application areas of VR systems. 6. VR application projects at the VR lab of the technical university of Sofia. 7. VR in product design education at the Faculty of German Engineering and Industrial Management Education, TU - Sofia.
54 Topic: VR in Product Development IPROD Sofia Meeting 54 Stereoscopic projection Three different technologies are mainly used to achieve this: Active 3D stereo Passive 3D stereo Autostereoscopic projection The first two approaches use glasses (active or passive) and can be exploited for multiuser applications while the third requires no glasses, but for the most part is limited to present the content in stereo to one user only. In the following slides we describe briefly the principles of these technologies and give implementation examples.
55 Topic: VR in Product Development IPROD Sofia Meeting 55 Stereoscopic projection Two slightly different images are shown to both eyes Different principles Active Images are shown in a sequence (shutter glasses 120 Hz) Passive images for the left and right eyes are shown simultaneously: how to divide: а) color filters, b) polarization filters.
56 Topic: VR in Product Development IPROD Sofia Meeting 56 Stereoscopic projection Passive Stereo images for the left and right eyes are shown simultaneously: how to divide: а) color filters, b) polarization filters.
57 Topic: VR in Product Development IPROD Sofia Meeting 57 Stereoscopic projection Anaglyph Stereo images for the left and right eyes are shown simultaneously. How to divide: color filters.
58 Topic: VR in Product Development IPROD Sofia Meeting 58 Stereoscopic projection Anaglyph Stereo Example.
59 Topic: VR in Product Development IPROD Sofia Meeting 59 Stereoscopic projection Polarization Stereo images for the left and right eyes are shown simultaneously. How to divide: polarization filters.
60 Topic: VR in Product Development IPROD Sofia Meeting 60 Stereoscopic projection Passive Stereo Basic Principle The benefits of passive 3D stereo include: simple and cost effective system, best channel splitting, it does not put stress on the observer s eyes.
61 Topic: VR in Product Development IPROD Sofia Meeting 61 Stereoscopic projection Shutter Glasses basic principle. Display Left Subframe 1 Frame 1 Frame Right Subframe Left Subframe Right Subframe IR Transmitter IR Light 3D Glasses Observer
62 Topic: VR in Product Development IPROD Sofia Meeting 62 Stereoscopic projection Shutter Glasses Example.
63 Topic: VR in Product Development IPROD Sofia Meeting 63 Stereoscopic projection Active 3D stereo example: NVidia 3D Vision Technology
64 Topic: VR in Product Development IPROD Sofia Meeting 64 VR Demo: Visual Decision Platform VDP - Review (IC:IDO
65 Topic: VR in Product Development IPROD Sofia Meeting 65 VR Demo: Visual Decision Platform VDP - Package
66 Topic: VR in Product Development IPROD Sofia Meeting 66 VR Demo: Visual Decision Platform VDP - Ergonomics
67 Topic: VR in Product Development IPROD Sofia Meeting 67 VR Demo: Visual Decision Platform VDP - Reflect
68 Topic: VR in Product Development IPROD Sofia Meeting 68 Presentation Outline 1. What is Virtual Reality? 2. VR historical overview. 3. Structure and basic principles of VR systems. 4. Types of VR systems. 5. Main application areas of VR systems. 6. VR application projects at the VR lab of the technical university of Sofia. 7. VR in product design education at the Faculty of German Engineering and Industrial Management Education, TU - Sofia.
69 Topic: VR in Product Development IPROD Sofia Meeting 69 VR Main Application Areas Common features: VR is a tool for presenting information in the 3- dimentional space, which can be manipulated by specialized interface devices. What's why every task which requires for presentation in a 3-dimentional space is expected to be able to take advantage of the VR technology. This is also true for multidimensional tasks, which can be reduced to some kind of 3-dimentional presentation.
70 Topic: VR in Product Development IPROD Sofia Meeting 70 VR Main Application Areas Common features: Usually the VR applications are linked to the task of creation of a computer model of some object or event. If this computer model can be created without implementing significant resources then a successful application can be developed using VR methods and tools Example: Object 3D representation as Scene graph and resulting visualization.
71 Topic: VR in Product Development IPROD Sofia Meeting 71 VR Main Application Areas 1. Virtual prototyping: The Virtual Prototype represent close enough not only the geometry, but using various simulation approaches also important features of the designed product. The virtual prototype can be explored, tested and verified from different points of view, e.g. proper design or ergonomic features or simple assembly and disassembly of the components etc. ( LESC, KIT) The main advantage of this technology is time saving and reduced time-to-market, but also simplified process of document creation and management.
72 Topic: VR in Product Development IPROD Sofia Meeting 72 Main advantages Reduced number of physical prototypes (approximately by 20%), Reduced number of design errors, which are removed at earlier stages of product development, Reduced time-to-market, Increased product quality Better communication, especially in interdisciplinary teams, Easier verification of different product versions at a lower price. Better presentation of the design results ( IFIP, RWTH, Aachen)
73 VR Main Application Areas 2. Visualization: Evaluation and extracting information from big data sets Example: Visualization of CFD data (cfdthermo.hut.fi) Topic: VR in Product Development IPROD Sofia Meeting 73
74 Topic: VR in Product Development IPROD Sofia Meeting 74 VR Main Application Areas 3. Education Various types of simulators: flight, car, truck etc. ( Flight simulator
75 Topic: VR in Product Development IPROD Sofia Meeting 75 VR Main Application Areas 3. Education Clear metaphor for representing the real 3- dimentianal world. ( FCS Control Systems, Netherlands) Virtual welding simulator
76 Topic: VR in Product Development IPROD Sofia Meeting 76 VR Main Application Areas 3. Education Train the crew how to react in dangerous situations. (
77 Topic: VR in Product Development IPROD Sofia Meeting 77 VR Main Application Areas 4. Entertainment, movies, virtual museums (
78 Topic: VR in Product Development IPROD Sofia Meeting 78 Presentation Outline 1. What is Virtual Reality? 2. VR historical overview. 3. Structure and basic principles of VR systems. 4. Types of VR systems. 5. Main application areas of VR systems. 6. VR application projects at the VR lab of the technical university of Sofia. 7. VR in product design education at the Faculty of German Engineering and Industrial Management Education, TU - Sofia.
79 Topic: VR in Product Development IPROD Sofia Meeting 79 VR in Bulgaria VR Laboratory at the Technical University of Sofia Established 2008
80 Virtual reality Lab at the Technical University of Sofia Topic: VR in Product Development IPROD Sofia Meeting 80 In cooperation with LESC KIT, Germany
81 Virtual reality Lab at the Technical University of Sofia Topic: VR in Product Development IPROD Sofia Meeting 81 Hardware
82 Virtual reality Lab at the Technical University of Sofia Topic: VR in Product Development IPROD Sofia Meeting 82
83 Virtual reality Lab at the Technical University of Sofia Topic: VR in Product Development IPROD Sofia Meeting 83 Software COVISE-Basis COVISE Work- Flow-GUI COVISE CFD COVISE VR COVISE-VRML COVISE-DEV In-house developed VR software
84 Virtual reality Lab at the Technical University of Sofia Topic: VR in Product Development IPROD Sofia Meeting 84 Workflow
85 Automated workflow: CAD > VR Major steps in the developed procedure: CAD model export in a format supported by both systems (e.g. VRML), Activating a batch process for model file transfer to the VR system and launch of the VR application, All steps are fulfilled in the CAD environment. Topic: VR in Product Development IPROD Sofia Meeting 85
86 Topic: VR in Product Development IPROD Sofia Meeting 86 Automated workflow: CAD > VR CAD model VR Lab, TU - Sofia Presentation in VR system
87 Topic: VR in Product Development IPROD Sofia Meeting 87 Projects: Virtual Product Configurator Open web page Import modules from catalog Send order Place and arrange modules Check order details Customize modules
88 Topic: VR in Product Development IPROD Sofia Meeting 88 Projects: Virtual Product Configurator Web VR
89 Topic: VR in Product Development IPROD Sofia Meeting 89 VR Product Validation investigate Properties of Car instruments in VR
90 Create and manipulate Objects through Gestures Topic: VR in Product Development IPROD Sofia Meeting 90 VR Diagramm
91 Topic: VR in Product Development IPROD Sofia Meeting 91 VR Product Validation Compare features of real and virtual objects
92 VR applications integrating Wii Remote as interface device in a VR system Topic: VR in Product Development IPROD Sofia Meeting 92 VR Lab, TU - Sofia Wii Remote VR system
93 VR applications exploring surface roughness with force feedback haptic device VR Lab, TU - Sofia Настолна VR система Topic: VR in Product Development IPROD Sofia Meeting 93
94 VR applications marker-based Augmented reality system Topic: VR in Product Development IPROD Sofia Meeting 94 VR Lab, TU - Sofia Visualization of the object linked to the marker, captured with the camera
95 При VR applications marker-based Augmented reality system on mobile device Topic: VR in Product Development IPROD Sofia Meeting 95 AR mobile application VR Lab, TU - Sofia
96 VR applications presentation and exploration of CAE results in VR system Topic: VR in Product Development IPROD Sofia Meeting 96 Modeling and FEM analysis of a gas heater VR Lab, TU - Sofia Physical prototype of the product
97 VR applications presentation and exploration of CAE results in VR system Topic: VR in Product Development IPROD Sofia Meeting 97 Modeling and FEM analysis of a gas heater FEM model VR Lab, TU - Sofia
98 VR applications presentation and exploration of CAE results in VR system Topic: VR in Product Development IPROD Sofia Meeting 98 Modeling and FEM analysis of a gas heater VR Lab, TU - Sofia Presentation of the results: temperature distribution is presented with color coding
99 VR applications presentation and exploration of CAE results in VR system Topic: VR in Product Development IPROD Sofia Meeting 99 Modeling and FEM analysis of a gas heater VR Lab, TU - Sofia Multimodal presentation of FEM results: simultaneous (visual and acoustic) presentation of temperature distribution and strength.
100 Presentation Outline 1. What is Virtual Reality? 2. VR historical overview. 3. Structure and basic principles of VR systems. 4. Types of VR systems. 5. Main application areas of VR systems. 6. VR application projects at the VR lab of the technical university of Sofia. 7. VR in product design education at the Faculty of German Engineering and Industrial Management Education, TU - Sofia. Topic: VR in Product Development IPROD Sofia Meeting 10
101 VR in Product Design Education at FDIBA Course Virtual Engineering at bachelor level (3-rd year), for both specialties: Mechanical Engineering Computer Systems and Technologies Curriculum (2 lecture hours, 2 practical exercises) Introduction and main concepts, PLM (Product life-cycle management), CAD models, CAM/CAE, VR systems and technology - Emphasize: how to implement this approach as a tool for solving product design problems. Topic: VR in Product Development IPROD Sofia Meeting 10
102 VR Books Topic: VR in Product Development IPROD Sofia Meeting 10
103 Summary VR and AR are currently affordable also under limited budget and provide for a new way human-computer interaction; VR technologies allow us to explore virtual worlds in a a new way, not possible in real life; VR is very interdisciplinary (both applications & technology), it is not an isolated island; VR will be applied in many fields, but not only in the ways as we may think currently; Expand our mind and creativity; Give us new ideas and perspectives. Topic: VR in Product Development IPROD Sofia Meeting 10
104 References: Brooks,F., What's real about virtual reality? IEEE Computer Graphics and Applications, 6/1999, pp Burdea C. and Coiffet, P., Virtual Reality Technology, Wiley-IEEE Press, 2 edition, ISBN- 10: , SIGGRAPH 2004 Course Notes: Seeing, hearing, and touching: putting it all together. SIGGRAPH 2008, Class Notes: Don t be a WIMP ( SIGGRAPH 2009, Class Notes: Interactive Sound Rendering, ( SIGGRAPH 2009 Course Notes: Interaction - interfaces, algorithms, and applications. Craig A., W. Sherman and J. Will. Developing Virtual Reality Applications. Elsevier Inc Малешков С., Д. Чотров, А. Бъчваров, К. Камберов, Мултимодално представяне на резултати от FEM анализ в среда на виртуална реалност, International Scientific Conference FIT`2012, ISBN , October 2012, TU-Sofia, Bulgaria, pp Малешков С., Методи и средства на виртуалната реалност за решаване на технически инженерни задачи, ISBN , Издателство на ТУ София, Maleshkov S., Conceptual Model of Virtual Reality System, Information, Communication and Control Systems and Technologies, ISSN , Year 2, No. 1/2013, pp Maleshkov S., D. Chotrov, Post-processing of Engineering Analysis Results for Visualization in VR System, International Journal of Computer Science Issues, ISSN Vol. 10, Issue 2, No 2, March 2013, pp Topic: VR in Product Development IPROD Sofia Meeting 10
105 Questions? Topic: VR in Product Development IPROD Sofia Meeting 10
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