Theoretical and experimental studies of a surface acoustic wave flow sensor

Area of Science:

• Engineering
• Physics
• Materials Science

Background:

• Flow sensors are critical for various industrial and scientific applications.
• Surface Acoustic Wave (SAW) devices offer potential for precise measurements.
• Accurate flow rate determination often relies on pressure differential principles.

Purpose of the Study:

• To propose and validate a novel Surface Acoustic Wave (SAW) flow sensor.
• To investigate the relationship between flow rate and pressure difference.
• To analyze the sensor's response through strain analysis and Finite Element Method (FEM) simulation.

Main Methods:

• Development of a novel SAW flow sensor.
• Evaluation of the linear relationship between flow rate and pressure difference.
• Conducting strain analysis and FEM simulations to predict sensor behavior.
• Experimental validation of phase delay and frequency shift against flow rate.

Main Results:

• A linear relationship was observed between flow rate and pressure difference, consistent with prior research.
• FEM simulations and strain analysis indicated a linear dependence of phase delay on flow rate.
• SAW sensor frequency was found to decrease linearly with increasing flow rate.
• Experimental phase delay results aligned with simulations, and frequency changes were within predicted ranges.

Conclusions:

• The proposed SAW flow sensor demonstrates a reliable linear response to flow rate.
• The sensor's performance is validated through simulation and experimental data.
• This novel sensor offers a promising approach for accurate flow measurement.