Research and design of ultrasonic Doppler flowmeter hardware system based on STM32

Song Sun; Chaozhu Zhang; Xiaodong Gong

doi:10.1117/12.3029020

22 May 2024 Research and design of ultrasonic Doppler flowmeter hardware system based on STM32

Song Sun, Chaozhu Zhang, Xiaodong Gong

Proceedings Volume 13176, Fourth International Conference on Machine Learning and Computer Application (ICMLCA 2023); 131761A (2024) https://doi.org/10.1117/12.3029020
Event: Fourth International Conference on Machine Learning and Computer Application (ICMLCA 2023), 2023, Hangzhou, China

Abstract

Echo signal processing affects the measurement accuracy of ultrasonic Doppler flowmeter, in order to solve this problem, this paper uses Doppler method as the principle of flow measurement to develop an ultrasonic Doppler flowmeter based on STM32. Its main control chip adopts STM32F412VGT6 and Cortex-M4 core, which has powerful digital signal processing capabilities, which is conducive to the processing of echo signals. The hardware system part mainly designs ultrasonic signal transmission circuit, echo receiving circuit, operation amplification circuit, carrier signal generation circuit and mixing circuit. In terms of hardware system design, the transducer is used to transmit ultrasonic waves with a frequency of 1MHz, because the transmitted ultrasonic waves can not all be reflected, so the received echo signal is first amplified by the operation amplification circuit, and then the mixer is used to mix the amplified echo signal and the carrier signal generation circuit with a frequency of 1MHz frequency, and finally the mixed signal is filtered by the low-pass filter, and finally the Doppler shift signal with a lower frequency is obtained. Analog circuitry is validated to meet design requirements, improving accuracy and stability. Pave the way for digital signal processing.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Song Sun, Chaozhu Zhang, and Xiaodong Gong "Research and design of ultrasonic Doppler flowmeter hardware system based on STM32", Proc. SPIE 13176, Fourth International Conference on Machine Learning and Computer Application (ICMLCA 2023), 131761A (22 May 2024); https://doi.org/10.1117/12.3029020

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KEYWORDS

Ultrasonics

Doppler effect

Design

Linear filtering

Signal processing

Signal filtering

Tunable filters

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