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传统的超声波多普勒流量计测量的结果是大面积区域内具有统计意义的平均流速，不能反映流速在流通截面上的分布，当雷诺数变化很大时，测量误差很大。基于超声波多普勒效应，本文首次提出了通过对测量信息窗区域的控制，来实现在管流内部进行流速分区测量，进而测量出流速在流通截面上的分布。研制出发射传感器和接收传感器，分别能够产生细长的发射声束和接收声束，使得信息窗区域面积得以控制在很小的范围内，约 ２．１× ４．８ ｍｍ２，位置也被控制在设计值处，满足分区测量要求；在自行设计的模拟管道流动装置中，成功地进行了控制信息窗区域面积和位置的实验，测量值与设计值吻合很好。实现了管道流通截面上的流速分区测量。
The result of traditional ultrasonic Doppler flowmeter is the statistical average flow velocity in large area, which can not reflect the distribution of flow velocity in the flow cross section. When the Reynolds number changes greatly, the measurement error is very large. Based on the ultrasonic Doppler effect, this paper proposes for the first time that the measurement of the information window area can be used to measure the flow velocity inside the pipe flow and then measure the distribution of flow velocity in the flow cross section. Developed launch sensor and receive sensor, respectively, can produce slender emission beam and receive the sound beam, making the information window area area can be controlled in a very small range, about 2.1 × 4.8 mm2, the position is also controlled At the design value, the requirements of subarea measurement were satisfied. In the self-designed simulated pipe flow device, the experiment of controlling the area and position of the information window was successfully carried out. The measured values agree well with the designed values. Realize the flow velocity section measurement on the flow section of the pipeline.