Title:
METHOD FOR MEASURING THERMAL DIFFUSIVITY
Document Type and Number:
WIPO Patent Application WO/2015/046548
Kind Code:
A1
Abstract:
This invention provides a method and a device that make it possible to measure thermal diffusivity with high precision. This method for measuring thermal diffusivity via cyclic heating includes the following: causing thermal waves to propagate from a cyclic-heating surface (11) of a specimen (10) towards a thermal-wave absorption surface (12) thereof; measuring a first thermal wave at said cyclic-heating surface; measuring a second thermal wave at a prescribed position (14) inside the specimen between the cyclic-heating surface and the thermal-wave absorption surface; and obtaining the thermal diffusivity of the specimen from the amplitude ratio or phase difference between the first thermal wave and the second thermal wave. A measured first thermal wave and second thermal wave from one cycle are each approximated by a trigonometric function using the method of least squares, and the thermal diffusivity of the specimen is measured from the amplitude ratio or phase difference between those trigonometric approximations.
Inventors:
OMURA TAKAHIRO (JP)
Application Number:
PCT/JP2014/075971
Publication Date:
April 02, 2015
Filing Date:
September 29, 2014
Export Citation:
Assignee:
NICHIAS CORP (JP)
International Classes:
G01N25/18
Foreign References:
| JP2013526723A | 2013-06-24 |
Other References:
TAKAHIRO OMURA ET AL.: "The Thermal Conductivity Test by a Cyclic Heat Method", JAPAN JOURNAL OF THERMOPHYSICAL PROPERTIES, vol. 13, no. 4, 16 June 2009 (2009-06-16), pages 264 - 270
Attorney, Agent or Firm:
HARUKA PATENT & TRADEMARK ATTORNEYS (JP)
Patent business corporation far international patent firm (JP)
Patent business corporation far international patent firm (JP)
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