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17 条记录 (耗时 0.012 秒)

    Method and apparatus for measuring the density of a substance having free water compensation
    3.
    发明公开
    Method and apparatus for measuring the density of a substance having free water compensation 审中-公开
    用于测量的物质的密度与补偿的游离水的方法和装置

    公开(公告)号：EP0967479A3

    公开(公告)日：2002-11-27

    申请号：EP99111557.7

    申请日：1999-06-15

    申请人： Allen-Bradley Company, LLC

    发明人： Mays, David L. ,  Goldberg, Ira B. ,  Hollingsworth, Charles S.

    IPC分类号： G01N22/04 ,  A24C5/34

    CPC分类号： G01N22/04

    摘要： 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.

    摘要翻译： 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。

    Low voltage industrial control system providing intrinsically safe operation
    8.
    发明公开
    Low voltage industrial control system providing intrinsically safe operation 失效
    Niederspannungfürindustrielles Steuerungsystem mit eigensicherem Betrieb

    公开(公告)号：EP0883045A2

    公开(公告)日：1998-12-09

    申请号：EP98110256.9

    申请日：1998-06-05

    申请人： Allen-Bradley Company, LLC

    发明人： Kessler, Michael Wolfgang ,  Junker, Martin, Dr. ,  Slater, Robin-David ,  Kretschmann, Robert J. ,  Crabtree, John D.

    IPC分类号： G05B19/042

    CPC分类号： G05B19/0428 ,  G05B19/0423 ,  G05B19/0425 ,  G05B2219/14143 ,  G05B2219/24028 ,  G05B2219/25171 ,  G05B2219/25462 ,  Y02B70/3241 ,  Y04S20/227

    摘要： Low voltage logic circuitry is used to permit an entire subsystem of an industrial controller to be placed within a hazardous environment (20) to receive a high speed serial link (28) and undertake the control of multiple control points without expensive and awkward long cable runs and electrically isolating circuits for each cable run. Energy and bandwidth limiting on the high speed link allows power levels commensurate with high data rates yet intrinsic safety of the media allowing it to freely pass in and out of the hazardous area. A mixture of intrinsically safe and non-intrinsically safe equipment (24' and 24) on the same logical rack is allowed through a bus isolator (92) providing isolated data communication in backplane fashion between modules while wholly isolating power transmission along the backplane.

    摘要翻译： 低压逻辑电路用于允许工业控制器的整个子系统放置在危险环境（20）内以接收高速串行链路（28），并承担多个控制点的控制，而不需要昂贵和笨拙的长电缆运行 并为每个电缆线路电隔离电路。 高速链路上的能量和带宽限制允许与高数据速率相匹配的功率电平，而媒体的本质安全允许其自由进出危险区域。 通过总线隔离器（92）允许同一逻辑机架上的本质安全和非本质安全设备（24'和24）的混合，在模块之间以背板方式提供隔离的数据通信，同时完全隔离沿背板的电力传输。