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1. 发明授权

US5777237A Fluid flow meter 失效
标题翻译：流体流量计
公开(公告)号：US5777237A
公开(公告)日：1998-07-07
申请号：US492058
申请日：1995-08-28
申请人： James Digby Yarlet Collier , Christopher Davies , Christopher James Newton Fryer , Alain Henri Waha
发明人： James Digby Yarlet Collier , Christopher Davies , Christopher James Newton Fryer , Alain Henri Waha
IPC分类号： G01F1/66 , G01P5/24 , G01F1/00
CPC分类号： G01P5/245 , G01F1/662 , G01F1/667 , G01F1/668 , G01P5/248
摘要： A fluid flow meter comprises a pair of transducers spaced apart in the direction of fluid flow. A transmitter causes acoustic signals to be transmitted in both directions through the fluid by the transducers. A processor determines information relating to the fluid flow by monitoring the time of flight of acoustic signals received by the transducers. Part of the space between the transducers defines a flow path consisting of a flow structure having a plurality of parallel fluid flow passages which extend axially in the direction of flow, wherein the cross-sectional diameters of the passages are chosen such that substantially plane acoustic waves only are transmitted through the passages by the fluid, and wherein under working conditions the fluid flows through each passage such that the ratio of the volume flow rate through the passage to the total volume flow rate remains substantially constant with respect to the total volume flow rate.
摘要翻译： PCT No.PCT / GB94 / 00157 Sec。 371日期：1995年8月28日 102（e）日期1995年8月28日PCT 1994年1月27日PCT PCT。公开号WO94 / 17372 日期1994年8月4日流体流量计包括沿流体流动方向间隔开的一对换能器。发射器使得声信号通过换能器通过流体在两个方向上传播。处理器通过监测由换能器接收的声学信号的飞行时间来确定与流体流动有关的信息。换能器之间的空间的一部分限定了流动路径，该流动路径由具有沿流动方向轴向延伸的多个平行流体流动通道的流动结构组成，其中通道的横截面直径选择为使得基本上平面的声波仅通过流体通过通道传输，并且其中在工作条件下，流体流过每个通道，使得通过通道的体积流量与总体积流量之比相对于总体积流量保持基本恒定。

2. 发明授权

US5811689A Fluid flow meter 失效
标题翻译：流体流量计
公开(公告)号：US5811689A
公开(公告)日：1998-09-22
申请号：US725536
申请日：1996-10-03
申请人： James Digby Yarlet Collier , Christopher Davies , Christopher James Newton Fryer , Alain Henri Waha
发明人： James Digby Yarlet Collier , Christopher Davies , Christopher James Newton Fryer , Alain Henri Waha
IPC分类号： G01F1/66 , G01P5/24
CPC分类号： G01P5/245 , G01F1/662 , G01F1/667 , G01F1/668 , G01P5/248
摘要： A fluid flow meter comprises a pair of transducers spaced apart in the direction of fluid flow. A transmitter causes acoustic signals to be transmitted in both directions through the fluid by the transducers. A processor determines information relating to the fluid flow by monitoring the time of flight of acoustic signals received by the transducers. Part of the space between the transducers defines a flow path consisting of a flow structure having a plurality of parallel fluid flow passages which extend axially in the direction of flow, wherein the cross-sectional diameters of the passages are chosen such that substantially plane acoustic waves only are transmitted through the passages by the fluid, and wherein under working conditions that fluid flows through each passage such that the ratio of the volume flow rate through the passage to the total volume flow rate remains substantially constant with respect to the total volume flow rate.
摘要翻译：流体流量计包括沿流体流动方向间隔开的一对换能器。发射器使得声信号通过换能器通过流体在两个方向上传播。处理器通过监测由换能器接收的声学信号的飞行时间来确定与流体流动有关的信息。换能器之间的空间的一部分限定了流动路径，该流动路径由具有沿流动方向轴向延伸的多个平行流体流动通道的流动结构组成，其中通道的横截面直径选择为使得基本上平面的声波仅通过流体通过通道传送，并且其中在工作条件下，流体流过每个通道，使得通过通道的体积流量与总体积流量之比相对于总体积流量保持基本恒定。

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