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    • 4. 发明授权
    • Venturi flow sensor
    • 文丘里流量传感器
    • US07730793B2
    • 2010-06-08
    • US11941685
    • 2007-11-16
    • Jamie W. Speldrich
    • Jamie W. Speldrich
    • G01F1/44
    • G01F1/44G01F1/363G01F1/6842G01F1/6845G01F5/00
    • A venturi flow sensing method, system, and apparatus. A tube or chamber may be tapered from a larger to smaller diameter to create a venturi region within the tube or chamber. The venturi region causes a local increase in flow velocity. The change in velocity creates a local change in pressure which is, in turn, used to drive flow through a parallel bypass tube or chamber. Inside this bypass, a flow sensor can be located, and in some cases, a pressure sensor as well. The flow is then either exhausted back into the original tube or the bypass tube may alternatively dead end. In either case, flow can be measured without causing a significant overall pressure drop in the system.
    • 文丘里流量检测方法,系统和装置。 管或腔室可以从更大到更小的直径逐渐变细,以在管或腔室内产生文氏管区域。 文氏管区域导致流速的局部增加。 速度的变化产生局部的压力变化,这又是用来驱动流过并联旁路管或腔的流量。 在旁路旁边,可以定位流量传感器,在某些情况下也可以设置压力传感器。 然后将流量排出回到原始管中,或旁路管可以替代地死端。 在任一情况下,可以测量流量而不会在系统中引起明显的总体压降。
    • 5. 发明授权
    • Airflow sensor with pitot tube for pressure drop reduction
    • 气流传感器带皮托管用于压降降低
    • US07654157B2
    • 2010-02-02
    • US11948317
    • 2007-11-30
    • Jamie W. Speldrich
    • Jamie W. Speldrich
    • G01F1/46
    • G01F5/00G01F1/46G01F1/6842
    • An airflow sensor apparatus for measuring flow rate includes a pitot tube with a bypass channel wherein the pitot tube extends halfway into a flow channel in order to reduce a pressure drop. One or more upstream taps can be spaced along the pitot tube facing into a direction of a flow stream which directs the flow to the bypass channel. At least one or more downstream taps can be located to face perpendicular to the direction of flow, such that the fluid after passing over a flow sensor passes through the downstream tap(s). The upstream tap senses stagnation pressure and the down stream tap senses static pressure which is exerted in all directions in the flow channel in order to determine a velocity pressure based on a difference between pressures.
    • 用于测量流量的气流传感器装置包括具有旁通通道的皮托管,其中皮托管延伸到流动通道的中途,以减少压降。 一个或多个上游抽头可以沿着皮托管间隔开,其面向流向旁路通道的流动方向。 可以将至少一个或多个下游抽头定位成垂直于流动方向,使得流过流量传感器之后的流体通过下游丝锥。 上游龙头感测停滞压力,下游龙头感测在流动通道中在所有方向上施加的静压,以便基于压力差来确定速度压力。
    • 7. 发明申请
    • VENTURI FLOW SENSOR
    • VENTURI流量传感器
    • US20090139347A1
    • 2009-06-04
    • US11941685
    • 2007-11-16
    • JAMIE W. SPELDRICH
    • JAMIE W. SPELDRICH
    • G01F1/44
    • G01F1/44G01F1/363G01F1/6842G01F1/6845G01F5/00
    • A venturi flow sensing method, system, and apparatus. A tube or chamber may be tapered from a larger to smaller diameter to create a venturi region within the tube or chamber. The venturi region causes a local increase in flow velocity. The change in velocity creates a local change in pressure which is, in turn, used to drive flow through a parallel bypass tube or chamber. Inside this bypass, a flow sensor can be located, and in some cases, a pressure sensor as well. The flow is then either exhausted back into the original tube or the bypass tube may alternatively dead end. In either case, flow can be measured without causing a significant overall pressure drop in the system.
    • 文丘里流量检测方法,系统和装置。 管或腔室可以从更大到更小的直径逐渐变细,以在管或腔室内产生文氏管区域。 文氏管区域导致流速的局部增加。 速度的变化产生局部的压力变化,这又是用来驱动流过并联旁路管或腔的流量。 在旁路旁边,可以定位流量传感器,在某些情况下也可以设置压力传感器。 然后将流量排出回到原始管中,或旁路管可以替代地死端。 在任一情况下,可以测量流量而不会在系统中引起明显的总体压降。
    • 10. 发明授权
    • Pressure sensor with a compressible insert to prevent damage from
freezing
    • 带有可压缩插入件的压力传感器,以防止冻结
    • US5792958A
    • 1998-08-11
    • US786820
    • 1997-01-21
    • Jamie W. Speldrich
    • Jamie W. Speldrich
    • G01L9/00G01L19/06G01L9/06G01L9/08G01L9/12
    • G01L19/06
    • A pressure sensor is provided with a compressible insert that is disposed within an internal opening of a potentially frangible component, such as a tubular glass member. If a condensate forms within the internal opening of the tubular glass member, freezing of the condensate can cause it to expand and damage the glass member. The compressible insert absorbs the expansion of the liquid condensate by compressing and prevents the expanding condensate from cracking the tubular glass member. The compressible insert, in a particularly preferred embodiment of this invention, has an opening extending therethrough to facilitate the transmission of pressure throughout the aligned openings of the pressure sensor. In one particular embodiment, a silicone die is etched to provide a cavity and corresponding diaphragm portion on which piezoresistive elements are disposed. The silicon pressure die is attached, by anodic bonding, to the tubular glass member and the tubular glass member is, in turn, attached to a tubular support member. The tubular support member can be attached to a metallic conduit structure to facilitate connection of the pressure sensor to a tube or hose.
    • 压力传感器设置有可压缩插入件,该可压缩插入件设置在诸如管状玻璃构件的潜在易碎部件的内部开口内。 如果在管状玻璃构件的内部开口内形成冷凝物,则冷凝物的冷凝可导致其膨胀并损坏玻璃构件。 可压缩插入物通过压缩吸收液体冷凝物的膨胀,并防止膨胀的冷凝物破裂管状玻璃构件。 在本发明的一个特别优选的实施例中,可压缩插入件具有穿过其中延伸的开口,以便于在压力传感器的整个对准开口处传递压力。 在一个具体实施例中,蚀刻硅树脂管芯以提供其上设置有压阻元件的空腔和相应的隔膜部分。 硅压力模具通过阳极接合附接到管状玻璃构件,并且管状玻璃构件又连接到管状支撑构件。 管状支撑构件可以附接到金属导管结构以便于将压力传感器连接到管或软管。