Design and Implementation of an Ultrasonic Flowmeter Based on the Cross-Correlation Method

Area of Science:

• Engineering
• Metrology
• Fluid Dynamics

Background:

• Ultrasonic flowmeters are critical for accurate fluid measurement in various industries.
• Existing technologies face challenges in achieving high precision, especially under demanding conditions.

Purpose of the Study:

• To design and validate a high-precision ultrasonic flowmeter using the cross-correlation method.
• To enhance measurement accuracy and operational efficiency for industrial flow monitoring.

Main Methods:

• Designed a novel ultrasonic flowmeter incorporating a cross-correlation algorithm.
• Simulated ultrasonic wave propagation using COMSOL Multiphysics 5.6.
• Implemented the cross-correlation algorithm simulation in Python and combined FPGA with an embedded microprocessor.

Main Results:

• Tested on National Institute of Metrology and self-built platforms using multiple verification methods.
• Achieved high flow velocity (26 m/s) and wide pipe diameter (DN6–1600) measurement capabilities.
• Demonstrated a relative indication error absolute value not exceeding 0.815% and repeatability not exceeding 0.150%.

Conclusions:

• The designed ultrasonic flowmeter offers high measurement accuracy and excellent repeatability.
• The device exhibits strong stability and a broad application range, suitable for demanding industrial environments.