Hemisphere Law, PLLC
Ultrasonic gas flow meter based on FPGA and DSP
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.
HEFEI UNIVERSITY OF TECHNOLOGY
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Kejun Min Wei Ziwen Wenjiao
Xu Fang Wang Shen Zhu