A Novel Measurement Method of Temperature Distribution Utilizing the Spectrum Intensity of Narrow Band Wavelengths of Thermo-chromic Liquid Crystal

Improved Measurement with Scheimpflug Camera Configuration

Abstract

This paper described the development of measurement method of temperature distribution utilizing thermo-chromic liquid crystal, TLC. In the proposed method, temperature was determined using the ratio of scattered light intensities at narrow band blue wavelengths on TLC. Images of light intensity were captured by two monochrome cameras with band-path filters, and these cameras were set to Scheimpflug configurations. The result shows that the temperature for the maximum value of scattered light intensity was differed by the effect of the elevation angle of the camera in comparison for the result of the previous method. In the proposed method, the widest measurable temperature range was 14-44°C using the combination of 436nm/405nm. The uncertainty of the proposed method was improved than previous method.