· Method of measuring the strain of the stress, strain · stress sensor, and its manufacturing meth

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PROBLEM TO BE SOLVED : To provide a noncontact-type strain/stress measuring method capable of measuring the strain or stress in static and dynamic pulling/compression directions with high accuracy, and determining each directionality thereof, or the like. SOLUTION : A strain/stress sensor 10 including an oxide-based ceramics sintered body formed by adding a rare earth element, such as Eu to MAl2O4(M=Sr, Ca or Ba) as emission center ion, in which an emission wavelength, when irradiating excitation light fluctuates according to the intensity of a strain/stress, and a fluctuation direction of the emission wavelength is different according to the direction of the strain/stress, is installed on a structure 1. The strain/stress sensor 10 is irradiated with an exciting light 11 to undergo fluorescence emission 12, and the emission wavelength is measured by a wavelength measuring means; and emission wavelength change with respect to a reference emission wavelength, when a strain is not generated in the structure, and its direction are measured, to thereby measure the strain or the stress generated in the structure 1, and to determine its directionality. COPYRIGHT : (C)2011, JPO&INPIT