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 language | English (US) |
|---|---|
| Pages (from-to) | 445-451 |
| Number of pages | 7 |
| Journal | American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD |
| Volume | 372 |
| Issue number | 7 |
| State | Published - 2002 |
| Externally published | Yes |
| Event | 2002 ASME International Mechanical Engineering Congress and Exposition - New Orleans, LA, United States Duration: Nov 17 2002 → Nov 22 2002 |
All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Fluid Flow and Transfer Processes