Combined Longitudinal and Surface Acoustic Wave Analysis for Determining Small Filling Levels in Curved Steel...

Area of Science:

• Materials Science
• Sensor Technology
• Acoustics

Background:

• Measuring small filling levels in closed steel containers presents significant challenges.
• Ultrasonic techniques offer a sensitive and non-invasive approach for online monitoring.

Purpose of the Study:

• To develop and validate a new ultrasonic sensor system for precise measurement of small filling levels.
• To assess the efficacy of combining longitudinal and surface acoustic wave analysis for this application.

Main Methods:

• A non-invasive ultrasonic sensor system was designed with transducers mounted on the outer wall of a steel container.
• The system utilized both longitudinal wave analysis and a combination of longitudinal and surface acoustic wave analysis.
• Measurements were taken for filling levels ranging from 0 to 5 cm.

Main Results:

• The combined ultrasonic approach achieved consistent and accurate determination of small filling levels across the entire 0-5 cm range.
• A high coefficient of determination (R² = 0.99) was obtained, indicating excellent correlation between the sensor readings and actual filling levels.
• The non-invasive nature of the sensor system was maintained throughout the experiments.

Conclusions:

• The developed ultrasonic sensor system effectively addresses the challenge of measuring small filling levels in closed steel containers.
• Combining longitudinal and surface acoustic wave analysis provides a robust and accurate method for non-invasive online monitoring.
• This technology holds promise for various industrial applications requiring precise level sensing.