Piezoelectric Impedance Sensor-Based Structural Health Monitoring for Critical Members of Civil Infrastructures

Abstract:

This paper presents novel structural health monitoring techniques for critical members of civil structures using electro-mechanical impedance sensors. The basic concept of this technique is to monitor critical locations of a structure for changes in structural impedance that would indicate imminent damage. In this paper, principal hardware and software issues on this topic are reviewed. An active sensing node incorporating on-board microprocessor and radio frequency telemetry is introduced in a sense of tailoring wireless sensing technology to the impedance method. A data compression algorithm using a principal component analysis is embedded into the on-board chip of the active sensing node. Finally, a method for compensating the temperature effects on the impedance measurements using cross-correlation analysis with effective frequency shifts is presented.

• Periodical: Advances in Science and Technology (Volume 56)
• Pages: 395-400
• DOI: https://doi.org/10.4028/www.scientific.net/AST.56.395
• Online since: September 2008
• Authors: Chung Bang Yun, Seung Hee Park
• Keywords: Civil Infrastructure, Impedance, Piezoelectric Sensors, Structural Health Monitoring (SHM)

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