Single-Thermocouple Suspended Microfluidic Thermal Sensor with Improved Heat Retention for the Development of...

Area of Science:

• Micro-Electro-Mechanical Systems (MEMS)
• Thermal Engineering
• Sensor Technology

Background:

• Increasing demand for sensitive and portable thermal sensors in medical and industrial fields.
• Limitations of traditional thermal sensor designs regarding heat loss and performance.

Purpose of the Study:

• To propose and evaluate a novel suspended bridge structure for enhanced thermal sensor performance.
• To reduce heat loss and improve sensitivity and response time of thermal sensors.

Main Methods:

• Fabrication of a suspended bridge structure using MEMS technology.
• Theoretical modeling of heat conduction, convection, and radiation.
• Finite element analysis (FEA) for thermal performance evaluation.
• Infrared temperature measurements for experimental validation.

Main Results:

• The suspended bridge structure reduces heat loss by 88.64% compared to traditional designs.
• Achieved ultra-high sensitivity of 0.38 V/W and a fast response time (<200 ms).
• High correlation coefficient (approx. 1.0) between sensor output voltage and input power.

Conclusions:

• The proposed MEMS suspended bridge structure significantly enhances thermal sensor performance.
• The design offers improved heat retention, leading to higher sensitivity and accuracy.
• Potential for integration into multi-component detection systems for advanced biomedical applications.