Class9 - Accelerometers and Recent Advances in Wireless...

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1 CEE511 Structural Dynamics University of Michigan February 16, 2005 Prof. J. P. Lynch Accelerometers and Recent Advances in Wireless Structural Monitoring CEE511 Structural Dynamics: February 16, 2005 Prof. J. P. Lynch University of Michigan CEE511 Structural Dynamics University of Michigan February 16, 2005 Prof. J. P. Lynch Accelerometers • 3 accelerometer types used in civil structures: 9 Force balance accelerometers (FBA) • Greatest market share • Expensive at approximately $1000 per FBA 9 Piezoelectric accelerometers • Popular in dynamic settings • Moderate pricing at approximately $400 per accelerometer 9 Microelectromechanical system (MEMS) • Represents the future • Demand driven by car manufacturer • Small and accurate • Inexpensive $5-50 per accelerometer
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2 CEE511 Structural Dynamics University of Michigan February 16, 2005 Prof. J. P. Lynch Force Balance Accelerometer • Feedback current that balances internal mass is proportional to acceleration
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Class9 - Accelerometers and Recent Advances in Wireless...

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