STRAIN/STRESS MEASURING METHOD OF STRUCTURE AND STRAIN/STRESS SENSOR

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.SOLUTION: A strain/stress sensor including an oxide-based ceramics formed by adding 0.1-10 atom% (preferably 0.3-6.0 atom%) of Mn to AlO, 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. The strain/stress sensor is irradiated with an exciting light to undergo fluorescence emission, and the emission wavelength is measured by wavelength measuring means; and an amount and direction of emission wavelength change with respect to a reference emission wavelength, when a strain/stress does not act on the structure, are measured, to thereby measure the static or dynamic strain or stress generated in the structure, and to determine its directionality. The strain/stress sensor can be a bulk body formed by sintering the oxide-based ceramics.