中圖分類號：TP212；TB553 文獻標志碼：A DOI: 10.16157/j.issn.0258-7998.233845
中文引用格式： 廖建華，范寒柏，王健，等. 二維側(cè)視型聲學(xué)多普勒流速儀的設(shè)計[J]. 電子技術(shù)應(yīng)用，2023，49(8)：65-69.
英文引用格式： Liao Jianhua，F(xiàn)an Hanbai，Wang Jian，et al. Design of two-dimensional side-looking acoustic Doppler velocimeter[J]. Application of Electronic Technique，2023，49(8)：65-69.

Design of two-dimensional side-looking acoustic Doppler velocimeter

Abstract： To obtain the two-dimensional velocity distribution at the shallow or cross-section of the water and expand the application range of ultrasonic measurement, a two-dimensional side-looking acoustic Doppler velocimeter was designed. A 5 MHz high-frequency ultrasonic wave was used for measurement, and a unique probe structure was designed to avoid interference to the measuring flow field. Based on the basic principle of the Doppler effect, the complex autocorrelation algorithm was used to estimate the frequency, and the radial velocity of ultrasonic transducer was calculated. The two-dimensional velocity was obtained through the transformation matrix. The experimental results show that the designed two-dimensional side-looking acoustic Doppler velocimeter can effectively measure the two-dimensional velocity of the sample with the standard deviation of 0.047 m/s and 0.009 m/s respectively, which has certain practical value.

Key words : Doppler velocimeter；two-dimensional velocity；complex autocorrelation