| 摘要 |
This is an apparatus for accurately and reliably measuring fluid flow under turbulent or pulsating conditions with high signal to noise ratio and using a symmetrical design which works with How in either directio n. The apparatus is particularly well suited for measuring airflow in a bi-level respiratory system. The apparatus includes a flow conduit (34), an upstream sense tube (36) protruding into the flow a conduit (34) with a notch opening (38) facing into die flow stream, a downstream sense tube (40) protruding into the How conduit (34) with a notch opening (42) facing away from die flow stream, and a flow or pressure sensor/transducer (44) disposed in connecting lines (46, 48) between the upstream and downstream sense tubes (36, 40). The notch ed opening (38, 42) has a square, semi-cylindrical shape. The sow conduit (34) is either straight or angled. |
