A small calibrator has been constructed to facilitate wide-band liquid crystal temperature measurements on complex, curved surfaces. The calibrator’s size, 21.3 mm by 20.3 mm by 10.0 mm thick, makes it ideal for in-situ calibrations at multiple sites on curved surfaces. Its design utilizes the heating/cooling ability of a thermoelectric cooler, and its temperature is quickly and accurately controlled by computer. To test the calibrator’s accuracy, a liquid crystal sample was calibrated. Subsequent comparisons to thermistor measurements of a uniform temperature copper block painted with liquid crystals showed the calibration to be accurate to +/−0.1°C between the red start and the approximate blue start temperatures, and the maximum error was less than +/−0.3°C in the dark blue/violet region.
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A Novel Mini Calibrator for Thermochromic Liquid Crystals
Christopher J. Elkins, Physical Science Research Associate,,
Christopher J. Elkins, Physical Science Research Associate,
Mechanical Engineering Department, Building 500, Stanford University, Stanford, CA 94305
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John Fessler, Assoc. Mem. ASME, Senior Engineer,,
John Fessler, Assoc. Mem. ASME, Senior Engineer,
Exponent, 149 Commonwealth Drive, Menlo Park, CA 94025
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John K. Eaton, Fellow ASME, Professor,
John K. Eaton, Fellow ASME, Professor,
Mechanical Engineering Department, Building 500, Stanford University, Stanford, CA 94305
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Christopher J. Elkins, Physical Science Research Associate,
Mechanical Engineering Department, Building 500, Stanford University, Stanford, CA 94305
John Fessler, Assoc. Mem. ASME, Senior Engineer,
Exponent, 149 Commonwealth Drive, Menlo Park, CA 94025
John K. Eaton, Fellow ASME, Professor,
Mechanical Engineering Department, Building 500, Stanford University, Stanford, CA 94305
Contributed by the Heat Transfer Division for publication in the Journal of Heat Transfer. Manuscript received by the Heat Transfer Division December 14, 1999; revision received November 21, 2000. Associate Editor: A. Majumdar.
J. Heat Transfer. Jun 2001, 123(3): 604-607 (4 pages)
Published Online: November 21, 2000
Article history
Received:
December 14, 1999
Revised:
November 21, 2000
Citation
Elkins , C. J., Fessler , J., and Eaton , J. K. (November 21, 2000). "A Novel Mini Calibrator for Thermochromic Liquid Crystals ." ASME. J. Heat Transfer. June 2001; 123(3): 604–607. https://doi.org/10.1115/1.1370505
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