Wisden
Project Overview
Wisden: Wireless Sensor Network for Structural Health Monitoring
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Structural Health Monitoring (SHM) focuses on developing technologies and systems that assess integrity of structures. Most existing SHM implementations use wired data acquisition systems to collect vibration data from various locations in the structure induced by ambient sources for analysis. Installing a large scale wired data acquisition system may sometimes take several weeks and may often be turn out to be prohibitively expensive. Moreover, for old or damaged structures, instrumenting a large scale data acquisition system may not be possible for safety reasons. Our goal is to develop a wireless sensor network based data acquisition system which promises enormous benefits such as ease and flexibility of deployment and low maintenance and deployment costs. Wisden is a wireless sensor network based data acquisition system for structural health monitoring. Wisden continuously collects structural response data from a multi-hop network of sensor nodes, and displays and stores the data at a base station. Wisden can be, and has been, deployed in real structures to gather vibration data. |
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The main features of Wisden are:
- Self-configuring multi-hop routing: Builds the communication tree with base station as the root.
- Reliable data delivery: Hop-by-hop and End-to-End loss recovery using application layer NACK mechanism
- Data synchronization: Light-weigted time-synchronization of data at the basestation
- Data compression: Onset-Detector for event detection, and Run-length compression for silence suppression
- Ease and flexibility of deployment
- Supports upto 200Hz, 3-axis sampling of acceleration data.
Wisden is implemented on both MicaZ/Mica2 motes, and it has been deployed and tested in two real environments; "Four Seasons Building" and "Seismic Test Sturucture". The results show that Wisden can deliver time-synchronized vibration data over multi-hop network, and it can capture the dominant frequency response of the sturucture.
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People
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Publications
Jeongyeup Paek, Krishna Chintalapudi, John Cafferey, Ramesh Govindan, Sami Masri, A Wireless Sensor Network for Structural Health Monitoring: Performance and Experience, In: Proceedings of the Second IEEE Workshop on Embedded Networked Sensors (EmNetS-II),, Syndney, Australia, May 2005. [PDF]
N. Xu, S. Rangwala, K. Chintalapudi, D. Ganesan, A. Broad, R. Govindan, D. Estrin, A Wireless Sensor Network for Structural Monitoring, In: Proceedings of the ACM Conference on Embedded Networked Sensor Systems (Sensys), pp. 13--24, ACM Press, November 2004. [PDF]
Posters and Presentations
Jeongyeup Paek, Embedded Sensing of Structures: A Reality Check, August 2005. [PPT]
Jeongyeup Paek, Wireless Sensor Network for Structural Health Monitoring: Performance and Experience, May 2005. [PPT]
Sumit Rangwala, A Wireless Sensor Network for Structural Monitoring, Nov 2004. [PPT]
Talk CENS talk, Sep/24/2004
Poster at CENS 2st Annual Research Review. Oct/15/2004
Poster at CENS 1st Annual Research Review.
Software
You can download the Wisden software from the ENL CVS [README]Software Requirement
TinyOS - Wisden requires a complete installation of TinyOS including the java packages. Please refer to http://www.tinyos.net for detailed installation instructions for TinyOS.
- Wisden has been tested on both tinyos-1.1.0, 1.1.7, 1.1.8, and 1.1.10
- Wisden has been tested on nesC 1.1.1 and 1.1.2
- Wisden has been tested on Cygwin.
Software Instructions
You can run Wisden by the following procedure: [README]
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Hardware Requirement
Wisden requires the following hardwares:
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Future work
- Porting Wisden onto Tenet for scalability
- Deploying Wisden on Factor Building and Vincent Thomas Bridge
Last Modified: 15 Nov 2005