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C. Mourgues & M. Fischer

A product/process model-based system to produce work instructions

Abstract: The state-of-practice method to produce formal and good work instructions is time intensive, error prone and produces instructions with inconsistent format and content. These problems force contractors to rely on verbal communication to deliver work instructions to their laborers despite the negative impacts of this informal communication on productivity, rework, workface questions, and safety. This paper presents an automated system – FIPAPM, Field Instructions from Product And Process Models – to produce work instructions for laborers of cast-in-place (CIP) concrete construction. The FIPAPM system extracts design information from product models and construction information from process models based on the work scope of the activity for which the work instruction is produced. The presented system proved to produce work instructions faster, more correctly, and more consistently than the state-of-practice method. Therefore, FIPAPM enables contractors to produce formal, good-quality work instructions on a daily basis reducing field communication problems of informal, verbal work instructions.

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Full text: content.pdf (462,923 bytes) (available to registered users only)

Series: w78:2009 (browse)
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Caneparo L

Computer-integrated construction of timber structure

Abstract: The paper presents the integrated information system supporting design, manufactory and construction of a large glued laminated timber structure in Aosta, Italy. Design, the structure was completely computer modelled with in-house developed software, which considered both torsion and curvature constraints of timber. Manufactory, further proprietary software was used to develop, on a plane, the shape of each timber layer without torsion and curvature. The profiles were converted into CNC instructions to cut the timber leaves. Construction, to manage and verify the process onsite RF Ethernet LAN was established to allow bi-directional online communication between total station, radio frequency identification and the information system.

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Full text: content.pdf (610,631 bytes) (available to registered users only)

Series: w78:2000 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.analysis (0.028666) class.communication (0.011615) class.social (0.007978)
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Permission to reproduce these documents have been graciously provided by Icelandic Building Research Institute. The assistance of the editor, Mr. Gudni Gudnason, is gratefully appreciated


Cho-Chien Lu, Shih-Chung Kang, Shang-Hsien Hsieh

SimuSurvey: a computer-based simulator for survey training

Abstract: This paper presents the development of a computer-based simulator for survey training, referred to as SimuSurvey. Because modern survey instruments are usually expensive, difficult to maintain, and sensitive to weather conditions, surveying course instructors often find it difficult to supply sufficient high-quality instruments for the class. Also, the instructors often suffer the need to repeat similar instructions about instrument operations to individual stu-dents; and, lack a good means of recording each student’s learning progress. SimuSurvey was designed to address these issues - for use in survey training in a computer-generated virtual environment at a low cost. The functions cur-rently provided by SimuSurvey include: (1) the visualization of a survey instrument and measurement poles involved in an assigned survey task; (2) the simulation of the control interface of a real surveying instrument; (3) the recording of each student’s performed operations; and (4) design of learning activities for students to practice surveying tasks in a simulated environment. The focus of this paper is on the design and implementation of SimuSurvey. An example is pro-vided to demonstrate the applicability and effectiveness of SimuSurvey to survey training.

Keywords: simulator, survey training, engineering education, virtual reality, augmented reality

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Full text: content.pdf (1,748,371 bytes) (available to registered users only)

Series: w78:2007 (browse)
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Esa Viljamaa, Pekka Kilpelainen, Esa-matti Sarjanoja, Tomi Moakkonen, Teemu Kivimaki, Rauno Keikkila

Utilisation of a 3D Design Data in Controlling Pile Driving

Abstract: This research was concentrating on an exploitation of 3D design data to ground strengthening, especially focusing on the pile driving process. An XML model (schema) was defined for digital piling plan and as-build-data from the piling. The schema was targeted to cover the complete piling information flow from the piling plan from the 3D CAD software to the actual pile realisation data e.g. location and bearing capacity data, produced by the piling machine. In addition to the information management, a guiding system for the piling machine driver was developed. The guiding system included sensors and RTK-GPS positioning system for measuring the location of tool of the piling machine in relation to the planned locations of the piles. The system gives visual instructions for the driver for positioning of the piles according to the plan. A wireless database connection is used for synchronisation of the planned and realised piles information. The progress of the piling work can be easily supervised using an internet browser. The first proof-of-concept system was developed and tested during the year 2009. The main advantages of the system are reduced staking out work, faster pile positioning, automated piling data logging and data transfer between office and worksite and more up-to-date information about the progress of the piling work.

Keywords: pile driving, product modelling, positioning, RTK-GPS

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Full text: content.pdf (660,193 bytes) (available to registered users only)

Series: w78:2010 (browse)
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Friedman A, Medek L

Evaluation of existing CAD programs used by clients in housing design and marketing

Abstract: There exists a knowledge gap between architects and buyers in the North American homebuilding industry. Mass produced housing is commonly conceived for a user whose needs are unknown to the designer during the design process. In a built model unit, potential home-buyers canappreciate how their future home will look prior to the purchasing decision. Changing this process, by allowing the user to participate in the design process, can only be accepted once both the builder's and the buyers' objectives are satisfied. We wanted to explore the possibility of having clients directly involved in their home design for the purpose of improving both user satisfaction as well as unit marketing potential. Given the fact that computers have become more accessible toboth designers and the public at large, we assumed that users can operate a pre-prepared program by themselves, on which they can make limited design decisions. In our preliminary research, we found several software companies that are already marketing such programs. The objectives of our research were to determine the merit of these programs and to establish their potential in order to narrow the knowledge gap between builders/ architects and clients in the marketing and the construction of housing. We found that these programs do not adequately familiarize the user with the manipulation of the software or hardware systems. Their operation is rather complex for the lay person and better documentation and instructions are needed if these programs are to be integrated in the future marketing of housing.

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Full text: content.pdf (1,038,057 bytes) (available to registered users only)

Series: w78:1992 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.software development (0.021363) class.synthesis (0.018133) class.software-machine (0.016713)
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Permission to reproduce these papers has been graciously provided by Research Press of the National Research Council of Canada. The support of the editor, Dr. Dana Vanier, is gratefully appreciated.


Grabowska A, Klosowski P

Teaching teleworking and autoCAD - teleCAD case study

Abstract: In the following article we present the Internet based system for TeleCAD course preparation anddelivery. The system was developed to meet the Distance Education Centre at Technical University(DECTUG) needs. The Centre delivers Internet based courses, and is involved in course productionat local and international level. Example instructions (documents) concerning the pilot course willbe presented.

Keywords: Distance Education (DE), Internet, Web Based Training (WBT), AutoCAD, teleworking.

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Full text: content.pdf (187,125 bytes) (available to registered users only)

Series: ecce:2001 (browse)
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Koch C,König M,Neges M,Abramovici M

Performance study on natural marker detection for augmented reality supported facility maintenance

Abstract: The operation and maintenance phase is the longest and most expensive life-cycle period of building facilities. Operators need to perform activities to provide a comfortable living and working environment and to upkeep equipment to prevent functionality failures. For that purpose they manually browse, sort and select dispersed and unformatted facility information before actually going on the site. Although some software tools have been introduced they still spent 50% of the on-site work on inspection target localization and navigation. To improve these manual, time consuming and tedious procedures, the authors previously presented a framework that uses BIM-based Augmented Reality (AR) to support facility maintenance tasks. The proposed workflow contains AR supported activities, namely AR-based indoor navigation and AR-based maintenance instructions. An inherent problem of AR is marker definition and detection. As introduced, indoor natural markers such as exit signs, fire extinguisher location signs, and appliances’ labels were identified to be suitable for both navigation and maintenance instructions. However, small markers, changing lighting conditions, low detection frame rates and accuracies might prevent the proposed approach from being practical. In this paper the performance of natural marker detection will be evaluated under different configurations, varying marker types, marker sizes, camera resolutions, and lighting conditions. The detection performance will be measured using a pre-defined metric incorporating detection accuracy, tracking quality, frame rates, and robustness. The result will be a set of recommendations on what configurations are most suitable and practical within the given framework.

Keywords: Augmented Reality,Facility Maintenance,Natural Markers,Building Information Modeling,Detection Performance

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Full text: content.pdf (1,537,786 bytes) (available to registered users only)

Series: convr:2013 (browse)
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Pakanen J E, Möttönen V J, Hyytinen M J, Ruonansuu H A, Törmäkangas K K

A Web-Based Information System For Diagnosing, Servicing And Operating Heating Systems

Abstract: Diagnosing a heating system may turn out to be necessary even for an ordinary customer, like a residential building owner or a facility manager. The need is usually triggered by a technical problem in the system. The customer wants to know how to solve or handle the problem. This paper presents a Web-based information system, called WebDia, which is designed to assist customers with such heating problems. WebDia is a prototype system, constructed for district heating substations and oil heating systems. WebDia incorporates a Web server integrated with a back-end database, accessible from a browser of a PC, a Personal Digital Assistant (PDA) or a Wireless Application Protocol (WAP) mobile phone. The general idea behind the development is that the server computer shares its resources and knowledge with the user. Besides fault diagnosis, instructions for servicing and operating the heating system are also essential topics. The information content is gathered from various publications, material provided by manufacturers and interviews with experts. A great deal of the professional information also comes from the fourteen co-operating companies assisting in the system development. WebDia is a collection of dynamic HyperText Markup Language (HTML) pages, but it also includes pictures, photographs, video and audio recordings, and animations. Most of the pages are created using server-side scripting based on Active Server Pages (ASP) technology, but Java applets are also used. Building a system like WebDia turns out to be a tedious process, which requires knowledge and expertise from several disciplines in addition to modern Web authoring and multimedia tools.

Keywords: Web engineering, multimedia, database systems, WAP, PDA, diagnostic methods, heatin

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Full text: http://www.itcon.org/2001/4 (available to registered users only)

Series: itcon:2001 (browse)
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Pakanen J, Möttönen V, Hyytinen M

WebDia - a WWW-based tool for diagnosing, servicing and operating heatingsystems

Abstract: WebDia is a service manual, a help desk and a diagnostic tool on the Web. Technically, it consists of aWeb server and a PC or hand-held computer with an Internet connection, or a WAP mobile phone. Theidea is that the server computer shares its resources and knowledge with the user. Diagnostic decisionssuggested by the server are based on observations made by the user. WebDia is designed for ordinarycustomers, residential building owners, technical house managers and servicemen. The prototype system isconstructed for district heating substations and oil heating systems. Besides diagnosis, instructions forservicing and operating the plant are other essential topics. The Web-based user interface is flexible. Thepresented information is not only hypertext, but also pictures, photographs, video recordings, andanimations. So, the resulted information is comprehensive and easy to understand even for unskilledpersons.

Keywords: diagnostic methods, Web-based tools, help desk, user interface, district heating sub stations, oilheating systems, WAP, hand-held computers

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Full text: content.pdf (302,652 bytes) (available to registered users only)

Series: ecce:2001 (browse)
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