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Proceedings Paper

Improvement of FBG/PZT hybrid sensing system for composite materials
Author(s): Shinji Komatsuzaki; Seiji Kojima; Akihito Hongo; Nobuo Takeda; Yasuhiro Koshioka
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Paper Abstract

We have been developing a system for monitoring the health of aircraft structures made of composite materials. In this system, the Lamb waves that are generated by lead zirconium titanate PZT actuators travel through the composite material structures and are received by the embedded FBG sensors. To detect any Bragg wavelength change due to the reception of the Lamb wave, an arrayed waveguide grating (AWG) is used, which converts the Bragg wavelength change into an output power change. Since the conversion ratio is largely dependent on the initial Bragg wavelength, a temperture control was necessary for obtaining an optimum condition. However, we have developed a system that uses a denser AWG to eliminate the need for a temperature control. We suceeded in detecting 25 kHz to 1 MHz Lamb waves using our new system. We have also tried calculating the Bragg wavelength change of the obtained waveform, and confirmed that the Bragg wavelength change due to the reception of Lamb waves was less than 1 pico meter.

Paper Details

Date Published: 7 April 2008
PDF: 8 pages
Proc. SPIE 6933, Smart Sensor Phenomena, Technology, Networks, and Systems 2008, 69330A (7 April 2008); doi: 10.1117/12.776079
Show Author Affiliations
Shinji Komatsuzaki, Hitachi Cable, Ltd. (Japan)
Seiji Kojima, Hitachi Cable, Ltd. (Japan)
Akihito Hongo, Hitachi Cable, Ltd. (Japan)
Nobuo Takeda, The Univ. of Tokyo (Japan)
Yasuhiro Koshioka, R&D Institute of Metals and Composites for Future Industries (Japan)


Published in SPIE Proceedings Vol. 6933:
Smart Sensor Phenomena, Technology, Networks, and Systems 2008
Wolfgang Ecke; Kara J. Peters; Norbert G. Meyendorf, Editor(s)

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