An Alternative Technique for the Interpretation of Temperature Measurements Using Thermochromic Liquid Crystals

A new technique for the interpretation of temperature measurements carried out using the thermochromic liquid crystals is presented together with a new calibration method. The present method uses each one of the three components-red, green, and blue-for color description and allows measurements in a...

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Bibliographic Details
Published in:Heat transfer engineering 2007-02, Vol.28 (2), p.154-162
Main Authors: Vejrazka, J., Marty, Ph
Format: Article
Language:English
Subjects:
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Mechanics
Physics
Thermal instruments, apparatus and techniques
Thermics
Thermometry
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Summary:A new technique for the interpretation of temperature measurements carried out using the thermochromic liquid crystals is presented together with a new calibration method. The present method uses each one of the three components-red, green, and blue-for color description and allows measurements in a larger temperature range than the standard calibration methods, which are based on the reduction of the color components to a single quantity representing hue. The measurement procedure also includes the correction for illumination changes during each experiment. The measurements quality is checked on the well-known case of heat transfer measurements from an impinging jet. Finally, the different properties of liquid crystals are discussed.
ISSN:0145-7632
1521-0537
DOI:10.1080/01457630601023641