中圖分類號：TP216 文獻標(biāo)志碼：A DOI: 10.16157/j.issn.0258-7998.222953 中文引用格式： 劉偉,，秦會斌. 基于時差法的雙聲道超聲波水流量計[J]. 電子技術(shù)應(yīng)用,，2023，49(1)：58-62. 英文引用格式： Liu Wei,，Qin Huibin. Two-channel ultrasonic water flowmeter based on time difference method[J]. Application of Electronic Technique,，2023,，49(1)：58-62.
Two-channel ultrasonic water flowmeter based on time difference method
Liu Wei，Qin Huibin
Institute of New Electron Device and Application,，Hangzhou Dianzi University,，Hangzhou 310018，China
Abstract： For the small and medium diameter mono ultrasonic flowmeter due to the small number of channels vulnerable to uneven flow field distribution, a dual-channel ultrasonic water flowmeter based on the time difference method is proposed. The hardware system of the flowmeter consists of STM32L431 low-power module, high-precision timing module TDC-GP22 and other components. According to the dual-channel pipe segment structure, the data fusion method based on Kalman filter algorithm is proposed to fuse the measurement data of the two channels and complete the filtering process, which improves the measurement accuracy of the flowmeter. The experimental test shows that the flowmeter measurement error is within 2.5%, and the Kalman fusion filtering algorithm can effectively improve the flowmeter measurement accuracy.
Key words : Kalman filter,；fusion method,；ultrasound；flowmeter,；binaural
