Damage detection system for structural composite material and method of detecting damage to structural composite material
First Claim
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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Accused Products
Abstract
Damage caused to a structural composite material is detected while reduction in the strength thereof is prevented. A damage detection system 10 for a structural composite material includes a vibration application apparatus 20 including: a sheet body 22; a plurality of piezo elements 21 sprinkled throughout and held by the sheet body 22; and wires 23 for the piezo elements 21 provided to the sheet body 22. The damage detection system 10 also includes: a fiber optic sensor 30 which includes a grating portion 33 in a core portion 32 thereof, the grating portion 33 reflecting light of a predetermined wavelength; a light source to perform light irradiation onto the core portion 32; and a characteristic detection unit 42 to detect a characteristic of the light reflected from the grating portion 33.
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Citations
29 Claims
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1. A damage detection system for a structural composite material, comprising:
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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, and wherein the fiber optic sensor is placed in the joining portion so as to be sandwiched between the members. - View Dependent Claims (2, 3, 20, 22, 26)
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4. A damage detection method for a structural composite material, comprising
providing: -
the structural composite material comprising a plurality of members that are joined to each other at a joining portion, a piezo element fixedly disposed at a vicinity of the joining portion, a lead wire which transmits a signal to the piezo elements, a fiber optic sensor which is fixedly disposed in the joining portion so as to be sandwiched between the members and includes a grating portion in a core portion, the grating portion reflecting light of a predetermined wavelength, a light source which performs light irradiation onto the core portion, and a characteristic detection unit which detects a characteristic of the light reflected from the grating portion; applying vibration to the structural composite material by using the piezo element; and detecting damage based on a change in an output from the characteristic detection unit. - View Dependent Claims (23, 27)
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5. A damage detection system for a structural composite material, comprising:
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a vibration application apparatus configured to apply vibration to the structural composite material; 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 to 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 vibration application apparatus comprises a plurality of piezo elements, wherein the structural composite material includes a plurality of members that are joined to each other at a joining portion, and wherein the fiber optic sensor is placed in the joining portion so as to be sandwiched between the members. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 24, 28)
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18. A damage detection system for a structural composite material, comprising:
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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, and wherein the fiber optic sensor is embedded in one of the members so as to be placed in a vicinity of the joining portion. - View Dependent Claims (19, 21, 25, 29)
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Specification