A Low-Power and Robust Micromachined Thermal Convective Accelerometer.

Area of Science:

• Microelectromechanical Systems (MEMS)
• Sensor Technology
• Thermal Engineering

Background:

• Traditional accelerometers often face limitations in power consumption and reliability for specific applications.
• Thermal sensing principles offer an alternative approach for inertial measurement.
• Microfabrication techniques enable the development of compact and integrated sensor systems.

Purpose of the Study:

• To present a novel micromachined thermal convective accelerometer.
• To demonstrate its low power consumption and high reliability.
• To evaluate its performance in measuring acceleration.

Main Methods:

• Fabrication of a thermal convective accelerometer using a standard micro-electromechanical systems (MEMS) process flow on a glass substrate.
• Integration of a central heater and two symmetrically arranged thermistors for temperature differential monitoring.
• Experimental validation using rotation platform and shaking table setups to measure acceleration.

Main Results:

• The micromachined thermal convective accelerometer successfully measures accelerations exceeding 80 m/s².
• The sensor exhibits a linear sensitivity of approximately 110.69 mV/g.
• The device demonstrates low power consumption and high reliability characteristics.

Conclusions:

• The developed thermal convective accelerometer is a viable solution for precise acceleration measurement.
• Its low power and high reliability make it suitable for demanding applications.
• This MEMS-based sensor shows significant potential for future advancements in inertial sensing.