Temperature Measurement with Thermo Sensitive Liquid Crystal
Takahiro Ito, Toshiyuki KAMEOKA · Journal of the Visualization Society of Japan · 2006
Recently electronic equipments get gradually small. Therefore the fluid temperature measurements using contact-type thermometers are more difficult. The liquid crystals change the color depending on temperature. The liquid crystals mixes into the fluids (water, oil, etc, , , ) which enable to do non-contact measurements. We use a Neural Network to measure the temperature from the color. It is an advantage that the method can effectively uses the temperature measurement range of liquid crystal. But the method is of doubtful accuracy. We use the design of experiments and the robust design to improve an accuracy of measurement. As a result, ± 0.05 degree Celsius measurement is possible.