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一、对超声多普勒流速讯号的正确估算是仪器研制的基础与设计依据应用超声技术与多普勒原理来测量流速的方式,对多普勒回波讯号的认识与估算,涉及仪器主要参数的确定与所采取的技术路线的正确与否是研制仪器的基础与设计依据。 (一)、回波讯号的特征: 应用超声多普勒效应来测量流速,多普勒讯号的传递主要是通过流体中悬浮微粒对超声波的散射作用来实现的。因为超声波发射声束与接收声束不
First, the correct estimate of the ultrasonic Doppler flow rate signal is the basis for instrument design and design based on the application of ultrasound and Doppler flow velocity measurement methods, the Doppler echo signal recognition and estimation, involving the main parameters of the instrument The determination of whether the technical route adopted is correct or not is the basis and design basis for the development of the instrument. (A) the characteristics of the echo signal: the application of ultrasonic Doppler effect to measure the flow rate, Doppler signal transmission is mainly through the fluid particles in the scattering of ultrasound to achieve. Because the sonotrode and the receiving beam are not transmitted