Temperature Measurement of Hot Airflow Using Ultra-Fine Thermo-Sensitive Fluorescent Wires

Area of Science:

• Physics
• Materials Science
• Engineering

Background:

• Traditional temperature measurement methods like thermocouples have limitations in spatial resolution.
• The need for more precise temperature sensing in microscale environments is growing.

Purpose of the Study:

• To develop and validate a new temperature measurement method utilizing ultrafine fluorescent wires.
• To demonstrate the capability of visualizing heating/cooling layers and analyzing temperature fields with high resolution.

Main Methods:

• Employing ultrafine wires (less than 50 µm diameter) coated with fluorescent paint.
• Illuminating the wires with an ultraviolet light-emitting diode (UV-LED).
• Measuring the temperature-dependent intensity of the emitted orange fluorescence.

Main Results:

• Successfully visualized heating and cooling layers within the test volume.
• Demonstrated effective analysis of the temperature field using the fluorescent wire technique.
• Achieved high spatial resolution due to the minimal wire diameter.

Conclusions:

• The proposed ultrafine fluorescent wire method provides a simple yet effective approach for precise temperature measurement.
• This technique offers significant advantages over conventional methods, particularly in microscale thermal analysis.
• The method's versatility in material selection and simple structure allow for widespread application.