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1. 发明授权

US07308832B1 Strain gage differential pressure measurement in a fluid flow meter 失效
标题翻译：流量计中应变计差压测量
公开(公告)号：US07308832B1
公开(公告)日：2007-12-18
申请号：US11737890
申请日：2007-04-20
申请人： Stephen A. Ifft
发明人： Stephen A. Ifft
IPC分类号： G01F1/32
CPC分类号： G01F1/28
摘要： Apparatus and method for strain gage measurement of differential pressure across a body inserted into a flowing fluid where the body includes an exterior upstream facing portion, an exterior downstream facing portion and interior surfaces. At least one first electrically resistive strain gage having connecting terminals is disposed on one or more of the interior surfaces of the upstream facing portion and at least one second electrically resistive strain gage having connecting terminals is disposed on one or more of the interior surfaces of the downstream facing portion. The first and second strain gages are electrically connected to form the legs of a full Wheatstone Bridge, the electrical output of which is directly related to the differential pressure across the inserted body.
摘要翻译：用于应变计测量插入到流体中的主体的压差的装置和方法，其中主体包括外部上游侧部分，外部下游侧部分和内部表面。具有连接端子的至少一个第一电阻应变计设置在上游侧部分的一个或多个内表面上，并且具有连接端子的至少一个第二电阻应变计设置在所述内表面的一个或多个下游面对部分。第一和第二应变计电连接以形成完整的惠斯通电桥的腿，其电输出直接与穿过插入体的压差有关。

2. 发明授权

US5814738A Fluid flow meter and mixer having removable and replaceable displacement member 失效
标题翻译：流体流量计和混合器具有可移动和可更换的位移元件
公开(公告)号：US5814738A
公开(公告)日：1998-09-29
申请号：US848887
申请日：1997-05-01
申请人： Robert N. Pinkerton , Stephen A. Ifft
发明人： Robert N. Pinkerton , Stephen A. Ifft
IPC分类号： G01F1/40 , G01F1/42 , G01F1/44 , G01F1/22
CPC分类号： G01F1/3218 , G01F1/40 , G01F1/42 , G01F1/44
摘要： Fluid flow apparatus, such as a fluid flowmeter, a fluid mixing device or a fluid dispersing device, includes a one-piece fluid displacement member removably mounted in a section of fluid conduit so that no material joining, such as welding, is required for manufacture. The displacement member is removably and replaceably mounted in the conduit section so that one displacement member can be replaced by one or more other displacement members and thereby accommodate a very broad range of fluid flows. The mounting or support is provided at the downstream end of the displacement member which eliminates disturbances in the fluid flow around the displacement member and thereby provides for a highly stable signal. The signal is obtained via measurement taps in the wall of the conduit so that no measurement taps are required in or through the displacement member. The apparatus is adapted for use in sanitary applications.
摘要翻译：诸如流体流量计，流体混合装置或流体分散装置之类的流体流动装置包括可移动地安装在流体导管的一部分中的一体式流体移动构件，从而不需要诸如焊接的材料接合来制造。位移构件可移除地且可替换地安装在导管部分中，使得一个位移构件可以由一个或多个其它位移构件代替，从而适应非常宽范围的流体流动。安装件或支撑件设置在位移构件的下游端，消除位移构件周围的流体流动的干扰，从而提供高度稳定的信号。通过管道壁中的测量抽头获得信号，使得在位移构件中或通过位移构件不需要测量抽头。该设备适用于卫生应用。

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