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    • 3. 发明公开
    • Method and apparatus for measuring the density of a substance having free water compensation
    • 用于测量的物质的密度与补偿的游离水的方法和装置
    • EP0967479A3
    • 2002-11-27
    • EP99111557.7
    • 1999-06-15
    • Allen-Bradley Company, LLC
    • Mays, David L.Goldberg, Ira B.Hollingsworth, Charles S.
    • G01N22/04A24C5/34
    • G01N22/04
    • A method and apparatus for measuring the amount of free water contained within a substance includes a waveguide (64) having front and back sides (66, 68) disposed opposite each other. The waveguide (64) defines a chamber (74) for propagating a microwave signal therethrough. The waveguide (64) has an end (78) perpendicular to the front and back sides (66, 68) which forms a short within the chamber. The front and back sides (66, 68) each have an aperture (80) for passing a substance therethrough. A microwave signal in the frequency range of 10-25 gigahertz is directed through the chamber (74) wherein the generated microwave signal is reflected back from the short of the end (78). The generated and reflected signals form a ratio which is used by a microprocessor (60) along with the measurement from an adjacent sensor (12) that provides a dielectric constant measurement corresponding to the density of the substance in order to determine a weight of the substance compensated for free water.
    • 一种用于测量包含的物质中游离水的量的方法和装置,包括海誓山盟相对设置的波导(64),其具有正面和背面(66,68)。 波导(64)的限定了用于通过传播微波信号有一个腔室(74)。 波导(64)具有以结束(78)垂直于形成所述腔室中的短的前侧和后侧(66,68)。 的正面和背面(66,68)分别具有在孔(80),用于有传递物质通过。 在10至25千兆赫的频率范围内的微波信号通过所述腔室(74)的worin产生的微波信号被反射从短端部(78)背面的定向。 所产生的信号和反射信号形成被从相邻的传感器(12)所使用的一个微处理器(60)地连同所述测量比率的所有确实提供了一个介电常数测量对应于所述物质的密度,以确定矿物质的重量 补偿游离水。