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Charles Woodward, Jani Lahti, Jukka Rönkkö, Petri Honkamaa, Mika Hakkarainen, Jani Jäppinen, Kari Rainio, Sanni Siltanen, Jouko Hyväkkä

Case digitalo – a range of virtual and augmented reality solutions in construction application

Abstract: We describe a range of Virtual and Augmented Reality (VR/AR) solutions applied during the planning and construction of VTT’s new head offices, the Digitalo (“Digital House”) in Espoo, Finland. During the building phase as well as in later evaluations 2003-2006, the various approaches used for Digitalo’s visualisation included: radiosity rendering by still images; immersive virtual reality visualisation; mobile outdoors augmenting; augmented scale model; augmented web camera; 3D landscapes; and interior design by means of virtual and augmented reality. We employed various display devices ranging from HMD video glasses to CAVE screens, and from PDA’s to varying kinds of PC solutions. Some of our solutions, for example the augmented web camera and scale model systems, have not been previously presented and they appear here for the first time. Also, we describe the current status of the applied methods, as well as directions for future research. Altogether, we believe this case study to be among the most comprehensive ones in the world to include such a wide variety VR/AR techniques applied in a single building project.

Keywords: virtual reality, augmented reality, CAVE, HMD, web cameras, mobile computing, feature detection, markers, tracking, tangible user interfaces

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Series: w78:2007 (browse)
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Fahim Al-Neshawy, Jukka Piironen, Jari Puttonen, Tomi Laurila, Vesa Vuorinen, Mika Makitalo

The Use of ICT for Monitoring the Hygrothermal Behaviour of Building Structures

Abstract: Temperature and moisture are two of the main factors in physical, chemical and biological deterioration of building materials. Thermal gradients and movement of moisture in materials used in buildings typically cause deterioration of structures. The continuous monitoring of temperature and relative humidity provides valuable information about the long-term performance and deterioration of building structures. Documenting performance through monitoring can greatly enhance the understanding of the long-term degradation of building materials and the deterioration of the constructions due aging.The aim of this study is to develop a computerized monitoring system for building structures and test the reliability of the monitoring sensors. The study is focused on concrete building structures and consists of laboratory work and field measurements. The laboratory work focuses on designing a monitoring network system, developing a monitoring software application, assessing the reliability of the monitoring sensors, and testing of the moisture and thermally induced deterioration of concrete. The field measurements are carried out by monitoring the temperature and relative humidity of three repaired concrete facades as well as selected structures of a new school construction.The deliverable of the study will consist of two applications: (i) collecting of the moisture and thermal monitoring data and (ii) assessing the performance of building structures based on the acquired information. The results of the research will provide feasible methodologies and systems for monitoring and assessing the performance of building constructions, thus improving the quality of the final product. The scientific relevance of this research will be the improved correspondence between laboratory studies and observations of deterioration in practice.

Keywords: thermal, moisture, monitoring, assessment, building materials, sensor technology

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Series: w78:2010 (browse)
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Jukka Rönkkö, Jussi Markkanen

Lightweight 3D IFC visualization client

Abstract: We describe a construction product model 3D visualization client software concept that can be used in advanced meeting room, virtual reality and construction site augmented reality applications. Its main target is to im-prove construction project communication and understanding through visualization. It provides Industry Foundation Classes (IFC) geometry visualization capabilities to existing applications that can incorporate a Universal Plug and Play (UPnP) module to communicate with the visualization client at runtime. To accomplish this we present a software architecture based on UPnP networking standard that allows the visualization client to engage in two way runtime data exchange with existing construction project applications such as project management, cost estimation and quantity cal-culation applications. The client runs on laptop, desktop and portable tablet PCs. It offers stereoscopic viewing and spacemouse navigation for immersive virtual reality applications and live camera source background as well as exter-nal viewpoint control for augmented reality applications. We describe some usage scenarios of this concept, compare it to others and present early results as this work is part of an ongoing effort in Virtual Building Environments project.

Keywords: virtual reality, augmented reality, advanced meeting rooms, ubiquitous computing, IFC visualization

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Series: w78:2007 (browse)
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