Invention Grant
- Patent Title: Non-contact thermo-elastic property measurement and imaging system for quantitative nondestructive evaluation of materials
- Patent Title (中): 非接触热弹性性能测量和成像系统进行材料定量无损检测
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Application No.: US11496116Application Date: 2006-07-31
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Publication No.: US07716987B2Publication Date: 2010-05-18
- Inventor: Shamachary Sathish , Richard Reibel , John T. Welter , Charles Buynak
- Applicant: Shamachary Sathish , Richard Reibel , John T. Welter , Charles Buynak
- Applicant Address: US OH Dayton
- Assignee: University of Dayton
- Current Assignee: University of Dayton
- Current Assignee Address: US OH Dayton
- Agency: Dinsmore & Shohl LLP
- Main IPC: G01N29/04
- IPC: G01N29/04 ; G01N25/00 ; G01J5/02

Abstract:
A non-contact thermo-elastic property measurement and imaging system and method thereof are described. Acoustic energy is incident on a first surface of a specimen under test. The acoustic energy is converted partially into heat by the specimen, causing a slight increase in the temperature in a region of interaction. The temperature increase is imaged using a high sensitivity infrared camera. Presence of defects (surface and subsurface) in the material modifies the distribution of temperature. An image of temperature distribution can be used for nondestructive testing and evaluation of materials. The temperature change in the specimen caused by acoustic excitation is related to thermal and elastic properties of the material. A measurement of the change in the temperature as a function of the amplitude of incident excitation can be used for direct measurement of thermo-elastic property of the specimen.
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