Contributor(s)

Taslim, Mohammed, Kowalski, Gregory, Northeastern University, College of Engineering, Department of Mechanical Industrial and Manufacturing Engineering

Abstract

The calibration of thermochromic liquid crystals (TLC) used for measuring surface temperatures is required to develop a correlation between the surface temperature and reflected color. The few commercially available calibration systems tend to be very costly and are usually sold as complete packages containing a computer, camera, and thermocouples. The project objective is to produce an inexpensive and portable calibration system. The following report describes the development of a final design concept for the system, including the previously available information, concept considered, and the final design. The liquid crystal, adhered to a copper plate, is heated using two Kapton heaters that are controlled by Hewlett Packard Virtual Environment (HP VEE). When the TLC reaches specified temperatures, monitored by termocouples using HP VEE, color images of the TLC are recorded using a digital caera connected to the computer. The hue values of the colors are then analyzed using Matlab. From this series of images and the subsequent hue values, a calibration curve of the TLC is constructed.

Notes

Capstone Design Course MIM 1501, Winter quarter final report

Keywords

thermochromic liquid crystals (TLC), calibration systems

Publisher

Northeastern University

Publication Date

8-23-2007

Rights Holder

Northeastern University, Department of Mechanical Industrial and Manufacturing Engineering

Permanent URL

http://hdl.handle.net/2047/d10010439


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