Patent ID: 7621173
Filing Date: 2009-11-24
Classification: G01N

Abstract:
1. A nano-indentation ultrasonic detecting system for detecting mechanical properties of a target material, comprising: an indentation device disposed on a surface of the target material, wherein the indentation device generates an indentation on the surface, obtaining a relationship between a Young's modulus and a Poisson's ratio of the target material; an ultrasonic generator movably disposed on the surface of the target material, comprising a pulse laser emitter separated from the surface of the target material to generate at least two different ultrasonic signals thereon; and an ultrasonic receiver disposed on the surface of the target material and separated from the ultrasonic generator for receiving the ultrasonic signals, comprising a beam splitter, a reflective mirror, a light emitter and a detector, wherein the beam splitter is separated from the surface of the target material, the reflective mirror, the light emitter and the detector are adjacent to the beam splitter, the beam splitter is disposed between the reflective mirror and the light emitter and between the detector and the surface of the target material, and the beam splitter is arranged such that a laser outputting from the light emitter and passing through the beam splitter is directly received by the reflective mirror without passing through the surface of the target material; wherein the Young's modulus of the target material is obtained by analyzing the ultrasonic signals received by the ultrasonic receiver, and the Poisson's ratio of the target material is determined from the obtained Young's modulus and the relationship provided from a nano-indentation experiment.