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1. 发明授权

US4135396A Temperature compensating fluid velocity sensing apparatus 失效
标题翻译：温度补偿液速度检测装置
公开(公告)号：US4135396A
公开(公告)日：1979-01-23
申请号：US899628
申请日：1978-04-24
申请人： Dennis A. Stanke , Paul C. Rentmeester , Paul D. Ulland
发明人： Dennis A. Stanke , Paul C. Rentmeester , Paul D. Ulland
IPC分类号： G01P5/12 , G01F1/684 , G01F1/696 , G01F1/68
CPC分类号： G01F1/696 , G01F1/684
摘要： Apparatus are disclosed for sensing the velocity of a fluid stream, as may be flowing in a duct, pipe, or the like, which fluid stream exhibits variations in its temperature under different operating conditions. The apparatus includes a first probe which is exposed to the fluid stream and includes first temperature sensing means for sensing the temperature of the fluid stream. A second probe is provided which is disposed within the fluid stream and includes at least a portion constructed of a thermally conductive material. Heater means are disposed in thermally conductive relationship with said thermally conductive portion, and second temperature indicative of the temperature of said heater means. Third temperature sensing means are provided for sensing the temperature of the thermally conductive portion of the second probe at a point removed from the heater means, which temperature is a function of the heater means temperature, the fluid temperature, and the velocity of the fluid flowing thereover. In order to compensate for variations in the fluid temperature, heater control circuit means are provided for receiving temperature signals from the first and second temperature sensing means and for controlling the heat output of the heater means so as to maintain substantially constant the temperature difference between the fluid and heater means. Velocity output circuit means are provided for receiving the fluid temperature signal from the first temperature sensing means and the second probe temperature signal from the third temperature sensing means and for producing a signal related to the differences between said temperatures, which signal is related to the velocity of the fluid stream.
摘要翻译：公开了用于感测流体流的速度的装置，可以在管道，管子等中流动，该流体流在不同的操作条件下表现出其温度变化。该装置包括暴露于流体流的第一探针，并且包括用于感测流体流的温度的第一温度感测装置。提供第二探针，其设置在流体流内并且包括由导热材料构成的至少一部分。加热装置与所述导热部分成导热关系，第二温度表示所述加热器装置的温度。提供第三温度检测装置，用于在从加热器装置移除的点处感测第二探针的导热部分的温度，该温度是加热装置温度，流体温度和流体流动速度的函数在那里为了补偿流体温度的变化，提供了加热器控制电路装置，用于接收来自第一和第二温度检测装置的温度信号，并且用于控制加热器装置的热量输出，从而保持基本上恒定的温度差流体和加热装置。提供速度输出电路装置，用于接收来自第一温度检测装置的流体温度信号和来自第三温度感测装置的第二探针温度信号，并产生与所述温度之间的差异相关的信号，该信号与速度的流体流。

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