Temperature grid sensor for the measurement of spatial temperature distributions at object surfaces

Area of Science:

• Materials Science
• Sensor Technology
• Thermal Engineering

Background:

• Accurate real-time temperature distribution monitoring is crucial for industrial processes.
• Existing methods like infrared thermography have limitations, including sensitivity to surface emissivity and thermal insulation requirements.

Purpose of the Study:

• To develop and evaluate a novel temperature grid sensor based on the wire-mesh sensor principle.
• To demonstrate the sensor's capability for real-time transient temperature measurements on object surfaces.

Main Methods:

• Development of a grid sensor comprising a 256-element matrix of Pt1000 platinum chip resistors.
• Implementation of a high-speed multiplexing electronic system for resistance measurement.
• Spatial distribution of sensor elements on an object surface for localized measurements.

Main Results:

• The developed sensor successfully measures transient temperature distributions in real time.
• Demonstrated applicability in heating and mixing experiments within a vessel.
• Achieved accurate temperature measurements independent of surface radiation properties, unlike infrared cameras.

Conclusions:

• The wire-mesh temperature grid sensor offers a robust solution for industrial surface temperature monitoring.
• The sensor's design allows for thermal insulation of the object under investigation.
• This technology provides a significant advantage over conventional methods in specific industrial applications.