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公开(公告)号：US06739203B1
公开(公告)日：2004-05-25
申请号：US10222411
申请日：2002-08-16
IPC分类号： G01F166
CPC分类号： G01F1/662
摘要： Ultrasonic transducers for use in time-of-flight flow measurement are made by clamping a conformal material between a face of a piezoelectric element and a housing so as to efficiently acoustically couple the piezoelectric element to a flowing fluid wetting the housing. Both in-line and probe sensing heads are described, where the in-line sensor heads make use of side-looking transducers. Acoustic isolation arrangements are used to ensure that the transducer transmits and receives acoustic energy in a single, well-defined direction. Various pre-loading arrangements, such as metal springs that can be set by driving a wedge between the spring and the housing, are used to controllably force the piezoelectric element toward the housing.
摘要翻译： 用于飞行时间流量测量的超声换能器通过在压电元件的表面和壳体之间夹持共形材料来进行，以便有效地将压电元件声耦合到润湿壳体的流动流体。 描述了在线和探针感测头，其中在线传感器头使用侧视换能器。 声隔离装置用于确保换能器在单一的，明确定义的方向上发射和接收声能。 使用各种预加载装置，例如可以通过在弹簧和壳体之间驱动楔形而设置的金属弹簧，以可控制地将压电元件迫动到壳体。
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公开(公告)号：US06584860B1
公开(公告)日：2003-07-01
申请号：US10047597
申请日：2002-01-14
IPC分类号： G01F166
摘要： A significant problem in the flow probe art is that of accurately positioning a flow-sensing portion of the probe at a selected location within a pipe. Several arrangements are provided for determining the insertion depth of flow sensing probes, for measuring diameters of the pipes in which they are inserted, and for detecting the depth of those pipes. These generally involve adding to the flow probe a depth measurement device for generating an energetic beam that is reflected from the pipe or from an insertion fitting. One such sensor uses a phased array of piezoelectric element to serve both in a pulse-echo distance measurement device and in a time-of-flight flow measurement device.
摘要翻译： 流动探针技术中的一个重要问题是将探针的流量感测部分精确地定位在管道内的选定位置。 提供了几种布置来确定流量传感探针的插入深度，用于测量插入其中的管道的直径，并用于检测这些管道的深度。 这些通常包括向流量探头添加用于产生从管或从插入配件反射的能量束的深度测量装置。 一种这样的传感器使用压电元件的相控阵列来在脉冲回波距离测量装置和飞行时间流量测量装置中都起作用。
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