| 摘要 |
PROBLEM TO BE SOLVED: To provide a strain measuring method and a strain measuring device for noncontactly and easily measuring wide-range strain distribution in a measuring object such as plastic, rubber, metal, structure, and structural material. SOLUTION: The strain measuring device includes: a laser light projector 1 for radiating a measurement spot 9 of the measuring object 5 with laser light 4; a light receiving part 2 for picking up an image of a laser speckle pattern 3 being reflection light of the laser light 4; an image processing means for seeking the center of gravity point 12 of each speckle of the picked-up image of the laser speckle pattern 3; and a measurement means for measuring the strain of the measuring object 5 by detecting the amount and direction of movement of the center of gravity point 12 of each speckle. COPYRIGHT: (C)2011,JPO&INPIT
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