A transient technique for calibrating thermochromic liquid crsytals: The effects of surface preparation, lighting and overheat

Smitesh Bakrania, Ann M. Anderson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations

Abstract

This paper describes a transient technique for thermochromic liquid crystal hue-temperature calibration and presents results on the effects of surface preparation, lighting and overheat on that calibration. An image acquisition system and calibration test plate were designed for transient measurement and are described. The transient calibration results compare well to steady state calibration results for cooling and heating rates of 0.03 °C/s. Hysteresis occurred when the surface was heated above the play range of the crystals but was not permanent. We found that a poorly prepared liquid crystal surface yielded a "steep" calibration curve, was subject to light 'warm up' effects and the hysteresis effect was severe upon overheating.

Original languageEnglish (US)
Title of host publicationHeat Transfer
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages445-451
Number of pages7
ISBN (Print)079183638X, 9780791836385
StatePublished - 2002
Externally publishedYes

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
Volume7

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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