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Damage detection system for structural composite material and method of detecting damage to structural composite material

  • US 7,176,448 B2
  • Filed: 09/23/2004
  • Issued: 02/13/2007
  • Est. Priority Date: 09/26/2003
  • Status: Active Grant
First Claim
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1. A damage detection system for a structural composite material, comprising:

  • a piezo element;

    a fiber optic sensor which includes a grating portion in a core portion thereof, the grating portion configured to reflect light of a predetermined wavelength;

    a light source configured to perform light irradiation onto the core portion; and

    a characteristic detection unit configured to detect a characteristic of the light reflected from the grating portion,wherein the structural composite material includes a plurality of members that are joined to each other at a joining portion, andwherein the fiber optic sensor is placed in the joining portion so as to be sandwiched between the members.

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