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    • 7. 发明授权
    • Method and apparatus for measuring a fluid
    • 用于测量流体的方法和装置
    • US6125695A
    • 2000-10-03
    • US949249
    • 1997-10-13
    • William J. AlvestefferYufeng HuangLarry Eget
    • William J. AlvestefferYufeng HuangLarry Eget
    • G01F1/684G01F1/698G01F1/68
    • G01F1/698G01F1/6847
    • A flow sensor including a symmetrical sensor tube for carrying the fluid, first and second heaters symmetrically disposed at the sensor tube, and a first temperature sensor in thermal communication with the fluid. A flow meter including a flow sensor having a sensor tube, a first heater disposed at the sensor tube, a second heater disposed at the sensor tube, and a first temperature sensor in thermal communication with the fluid. The meter also includes a circuit for selectively applying power to the first and second heaters to maintain a temperature difference between a temperature of the first and second heaters and the temperature of the fluid, and for determining a difference in power supplied to the first and second heaters. A method including providing first and second heaters at a temperature a fixed amount above a temperature of the fluid; determining a difference in power supplied to the first and second heaters; and determining a measurement of the fluid from the difference in power supplied to the first and second heaters.
    • 流量传感器包括用于承载流体的对称传感器管,对称地设置在传感器管处的第一和第二加热器,以及与流体热连通的第一温度传感器。 一种流量计,包括具有传感器管的流量传感器,设置在传感器管的第一加热器,设置在传感器管上的第二加热器和与流体热连通的第一温度传感器。 仪表还包括用于选择性地向第一和第二加热器施加电力以维持第一和第二加热器的温度与流体温度之间的温度差并且用于确定供应到第一和第二加热器的功率差的电路 加热器 一种方法,包括在温度高于流体温度的一定温度下提供第一和第二加热器; 确定提供给第一和第二加热器的功率差; 以及根据供给到第一和第二加热器的功率差来确定流体的测量。
    • 8. 发明授权
    • Radiation detectors using multiple scintillation crystal pieces
    • 辐射探测器使用多个水晶晶体
    • US3835325A
    • 1974-09-10
    • US28169972
    • 1972-08-18
    • BROWN ENG CO INC
    • FISHMAN G
    • G01T1/202G01T1/20
    • G01T1/202
    • An apparatus for the detection of invisible radiation utilizing a unique geometry which results in an improved efficiency. A plurality of inorganic halide crystals are contained in a region of an enclosure, upon one surface of which is disposed a plurality of photomultiplier tubes. An optical coupling medium is diposed between a boundary of the crystals and the photomultiplier tubes, the medium being of a certain minimum dimension to ensure that light emitted from the crystals is incident at the photomultiplier tubes. In one embodiment, the enclosure is cylindrical and a sample area is centrally located within the enclosure. In another embodiment the enclosure is a parallelepiped with a large sample area located below the enclosure and the photomultiplier tubes located on the upper surface of the enclosure .
    • 一种用于利用独特几何形状检测不可见辐射的装置,其产生改进的效率。 在外壳的区域中包含多个无机卤化物晶体,其一个表面上设置有多个光电倍增管。 光耦合介质被放在晶体边界和光电倍增管之间,介质具有一定的最小尺寸,以确保从晶体发出的光入射到光电倍增管。 在一个实施例中,外壳是圆柱形的,并且样品区域位于外壳内的中心。 在另一个实施例中,外壳是平行六面体,其具有位于外壳下方的大样品区域和位于外壳的上表面上的光电倍增管。