| abstract |
An elastic wave detecting method and apparatus capable of detecting AE with high detection accuracy using an optical fiber are provided. A light source (2), a splitter (4) for splitting light from the light source (2), and at least one of the first and second splitters (4) are provided for an object to be inspected and guide light split by the splitter (4). Optical fibers 5 and 6, a coupler 7 for superimposing light guided from one end of the first optical fiber 5 to the other end, a photodetector 8 for detecting the light intensity of the superimposed light, A processing device 9 for extracting time and frequency information from the detection signal of the photodetector 8 and detecting an elastic wave generated in the inspection object; [Selection diagram] Fig. 1 |