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为了扩展超声波多普勒测量方法的功能并提高超声多普勒流量计的测量精度 ,提出了可以实现流通区域内流体速度分布测量的分区流速测量方法 .采用超声波交叉域法 ,对声束的发射与接收进行汇聚 ,使流速信息集中在流场中十几毫米到数毫米的区域范围内 ;采用多个发射、接收换能器 ,让声束的交叉域分布在描述流场特性的地方 ,实现了流场的分区流速测量 .扩展了超声波多普勒方法的测量功能 ,若对分区流速进行积分处理就可获得流量 ,为提高超声多普勒流量计的测量精度提供了技术基础
In order to extend the function of the ultrasonic Doppler measurement method and improve the measurement accuracy of the ultrasonic Doppler flowmeter, a method for the measurement of the velocity of the subarea flow, which can measure the fluid velocity distribution in the circulation area, is proposed. The ultrasonic cross-domain method And receive convergence, the flow rate information is concentrated in the flow field of more than a dozen millimeters to several millimeters of the region; the use of multiple transmit and receive transducers, so that the beam cross-domain distribution in describing the characteristics of the flow field to achieve The flow field zoning velocity measurement.Expanded the measurement function of the ultrasonic Doppler method, if the zonal flow velocity can be integrated to obtain the flow, in order to improve the ultrasonic Doppler flowmeter measurement accuracy provides the technical basis