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Methods and apparatus for measuring the cross-sectional area of a duct and the volume flow rate of fluid in the duct

机译:用于测量管道的横截面积和管道中流体的体积流量的方法和装置

摘要

Apparatus for measuring the area of a blood vessel and the volume flow rate of blood in such vessels, comprises an ultrasonic Doppler velocimeter (10, 12, 14 and 26) which derives a number of velocity signals dependent on the number of different velocities in a duct (13) and is coupled by way of a limiter 15 to a frequency-to-voltage converter 16 which therefore has an output with one component for each velocity signal. A further frequency-to-voltage converter 21 provides a signal dependent on the number of velocity signals and since this number depends on the duct area, the output from the converter 21 is a measure of this area. By using another frequency-to-voltage converter 23 and a mean detector 24, a mean velocity signal is obtained which when multiplied by the area signal generates volume flow rate. IMAGE
机译:用于测量血管面积和这种血管中血液的体积流率的设备包括超声多普勒测速仪(10、12、14和26),该超声测速仪根据测速仪中不同速度的数量得出多个速度信号。管道(13)并且通过限制器15耦合到频率-电压转换器16,因此频率-电压转换器16具有对于每个速度信号具有一个分量的输出。另一个频率-电压转换器21提供取决于速度信号的数量的信号,并且由于该数量取决于管道面积,所以转换器21的输出是该面积的量度。通过使用另一个频率-电压转换器23和平均检测器24,获得平均速度信号,当与面积信号相乘时,该平均速度信号产生体积流量。 <图像>

著录项

  • 公开/公告号GB2070771A

    专利类型

  • 公开/公告日1981-09-09

    原文格式PDF

  • 申请/专利权人 NATIONAL RESEARCH DEVELOPMENT CORP;

    申请/专利号GB19810003354

  • 发明设计人

    申请日1981-02-04

  • 分类号G01S15/58;G01F1/66;G01P5/00;

  • 国家 GB

  • 入库时间 2022-08-22 14:52:58

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