Special Issue On The 2001 India Usa Symposium On Emerging Trends In Vibration And Noise Engineering
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Special Issue On The 2001 India Usa Symposium On Emerging Trends In Vibration And Noise Engineering
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Author : India USA Symposium on Emerging Trends in Vibration and Noise Engineering (2001, Columbus, Ohio)
language : en
Publisher:
Release Date : 2003
Special Issue On The 2001 India Usa Symposium On Emerging Trends In Vibration And Noise Engineering written by India USA Symposium on Emerging Trends in Vibration and Noise Engineering (2001, Columbus, Ohio) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Synchronous Data Acquisition With Wireless Sensor Networks
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Author : Funck, Jürgen Helmut
language : en
Publisher: Universitätsverlag der TU Berlin
Release Date : 2018-07-19
Synchronous Data Acquisition With Wireless Sensor Networks written by Funck, Jürgen Helmut and has been published by Universitätsverlag der TU Berlin this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-19 with Computers categories.
Wireless sensor networks (WSN) are predicted to play a key role in future technological developments like the internet of things. Already they are beginning to be used in many applications not only in the scientific and industrial domains. One of the biggest challenges, when using WSN, is to fuse and evaluate data from different sensor nodes. Synchronizing the data acquisition of the nodes is a key enabling factor for this. So far research has been focused on synchronizing the clocks of the nodes, largely neglecting the implications for the actual measurement results. This thesis investigates the relation between synchronization accuracy and quality of measurement results. Two different classes of time synchronous data acquisition are investigated: event detection and waveform sampling. A model is developed that describes a WSN as a generic multi-channel data acquisition system, thus enabling direct comparison to other existing systems. With the help of this model it is shown, that synchronization accuracy should best be expressed as uncertainty of the acquired timing information. This way, not only the contribution of the synchronization to the overall measurement uncertainty can be assessed, but also the synchronization accuracy required for an application can be estimated. The insights from the uncertainty analysis are used to develop two distinct approaches to synchronous data acquisition: a proactive and a reactive one. It is shown that the reactive approach can also be used to efficiently implement synchronous angular sampling, i.e. data acquisition synchronous to the rotation of a machine's shaft. Furthermore, testing methods are suggested, that evaluate the synchronized data acquisition of an existing WSN as a whole. These methods can be applied to other data acquisition systems without changes, thus enabling direct comparisons. The practical realization of a WSN is described, on which the developed data acquisition methods have been implemented. All implementations were thoroughly tested in experiments, using the suggested testing methods. This way it was revealed, that a system's interrupt handling procedures may have a strong influence on the data acquisition. Furthermore, it was shown that the effective use of fixed-point arithmetic enables synchronous angular sampling in real-time during a streaming measurement. Finally, two application examples are used to illustrate the utility of the implemented data acquisition: the acoustic localization of two sensor nodes on a straight line and a simple order tracking at an induction motor test bench. Diese Dissertation untersucht die Zusammenhänge zwischen Synchronisationsgenauigkeit und Qualität der Messergebnisse. Zwei Klassen von zeitsynchroner Datenerfassung werden dabei betrachtet: die Detektion von Ereignissen und die Aufnahme von Kurvenformen. Es wird ein Modell entwickelt, welches ein WSN als ein allgemeines mehrkanaliges Datenerfassungssystem beschreibt. Dies ermöglicht den direkten Vergleich zwischen WSN und anderen Messsystemen. Weiter wird mit Hilfe des Modells gezeigt, dass die Synchronisationsgenauigkeit vorzugsweise als Unsicherheit der Zeitinformation angegeben werden sollte. Hierdurch kann nicht nur der Beitrag der Synchronisation zur gesamten Messunsicherheit bestimmt sondern auch die von einer Anwendung tatsächlich benötigte Synchronisationsgenauigkeit abgeschätzt werden. Ausgehend von den durch die Unsicherheitsbetrachtung gewonnenen Erkenntnissen werden ein proaktiver und ein reaktiver Ansatz zur synchronen Datenaufnahme entwickelt. Mit dem reaktiven Ansatz können Messdaten auch effizient drehwinkelsynchron, d. h. synchron zur Drehbewegung einer Maschinenwelle, aufgenommen werden. Es werden Testverfahren vorgeschlagen, mit denen sich die Synchronizität der Datenerfassung für ein WSN als Ganzes überprüfen lässt. Diese Verfahren lassen sich unverändert auf andere Messsysteme anwenden und ermöglichen somit direkte Vergleiche. Es wird die praktische Umsetzung eines WSN beschrieben, auf dem die entwickelten Methoden zur Datenerfassung implementiert wurden. Alle Implementierungen wurden mit den vorgeschlagenen Testverfahren untersucht. Hierdurch konnte gezeigt werden, dass die Interrupt-Bearbeitung der Sensorknoten entscheidenden Einfluss auf die Messdatenerfassung hat. Weiter konnte durch den Einsatz von Fixed-Punkt-Arithmetik die drehwinkelsynchrone Datenerfassung in Echtzeit realisiert werden. Schließlich wird die Nützlichkeit der implementierten Datenerfassung an zwei Anwendungen gezeigt: der akustischen Ortung zweier Sensorknoten sowie einer einfachen Ordnungsanalyse.
Special Issue On The Indo Usa Symposium On Emerging Trends In Vibration And Noise Engineering
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Author : India USA Symposium on Emerging Trends in Vibration and Noise Engineering (1996, Delhi)
language : en
Publisher:
Release Date : 1998
Special Issue On The Indo Usa Symposium On Emerging Trends In Vibration And Noise Engineering written by India USA Symposium on Emerging Trends in Vibration and Noise Engineering (1996, Delhi) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Index Of Conference Proceedings
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Author : British Library. Document Supply Centre
language : en
Publisher:
Release Date : 2003
Index Of Conference Proceedings written by British Library. Document Supply Centre and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Conference proceedings categories.
The Structural Engineer
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Author :
language : en
Publisher:
Release Date : 2001
The Structural Engineer written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Concrete construction categories.
International Congress Calendar
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Author :
language : en
Publisher:
Release Date : 2000
International Congress Calendar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Congresses and conventions categories.
Noise Control Engineering Journal
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Author :
language : en
Publisher:
Release Date : 2001
Noise Control Engineering Journal written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Noise control categories.
Proceedings Of 1996 India U S A Symposium On Emerging Trends In Vibration And Noise Engineering
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Author : India USA Symposium on Emerging Trends in Vibration and Noise Engineering
language : en
Publisher:
Release Date : 1998
Proceedings Of 1996 India U S A Symposium On Emerging Trends In Vibration And Noise Engineering written by India USA Symposium on Emerging Trends in Vibration and Noise Engineering and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Mine Safety Science And Engineering
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Author : Debi Prasad Tripathy
language : en
Publisher: CRC Press
Release Date : 2019-08-28
Mine Safety Science And Engineering written by Debi Prasad Tripathy and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-08-28 with Technology & Engineering categories.
In Mining Engineering operations, mines act as sources of constant danger and risk to the miners and may result in disasters unless mining is done with safety legislations and practices in place. Mine safety engineers promote and enforce mine safety and health by complying with the established safety standards, policies, guidelines and regulations. These innovative and practical methods for ensuring safe mining operations are discussed in this book including technological advancements in the field. It will prove useful as reference for engineering and safety professionals working in the mining industry, regulators, researchers, and students in the field of mining engineering.
Yearbook Of International Organizations 2014 2015 Volumes 1a 1b Set
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Author : Union of International Associations
language : en
Publisher:
Release Date : 2014-06-16
Yearbook Of International Organizations 2014 2015 Volumes 1a 1b Set written by Union of International Associations and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-06-16 with Business & Economics categories.
Volume 1 (A and B) covers international organizations throughout the world, comprising their aims, activities and events.