Ultrasonic gas flow meter based on FPGA and DSP

US10088348B2 · kind B2 · utility

Assignee

• Hefei University of Technology · CN

Inventors

• Kejun Xu · Hefei, CN
• Min Fang · Shanghai, CN
• Wei Wang · Dublin, US
• Wenjiao Zhu · Hefei, CN
• Ziwen Shen · Hefei, CN

Key dates

• Filing date: Aug 29, 2017
• Grant date: Oct 2, 2018
• Expiry date: Aug 29, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2291/105
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An ultrasonic gas flow meter based on FPGA and DSP consists of ultrasonic gas transducers and sensor components, transmitting/receiving signal channel switch circuits, a driving signal generation and amplification circuit, an echo signal conditioning and collection circuit, a time sequential controlling and signal processing circuit, a man-machine interface, a serial communication module and a power management module, propagation time of ultrasonic echo waves is calculated by adopting a variable ratio threshold and zero-crossing detection method of tracking maximum peak of the echo signal to obtain gas flow rates.