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    Active negative sequence cable monitor
    21.
    发明授权
    Active negative sequence cable monitor 失效
    主动负序电缆监视器

    公开(公告)号：US3938006A

    公开(公告)日：1976-02-10

    申请号：US547276

    申请日：1975-02-05

    Applicant: Govind Rao Gadwal ,  Eldon Keith Stanek

    Inventor： Govind Rao Gadwal ,  Eldon Keith Stanek

    IPC: H02H3/33 ,  H02H3/34 ,  H02H7/22 ,  H02H11/00 ,  H02H3/16

    CPC classification number: H02H3/343 ,  H02H11/001 ,  H02H7/226 ,  H02H3/338

    Abstract: A ground conductor break in a polyphase A.C. cable having a separate power conductor and an equal number of symmetrically spaced ground conductors for each phase is detected by sensing negative-sequence current components being induced in the ground conductors. In response to two or more ground conductors of a three-phase cable being broken, the break is detected by sensing a current flow in one of the power conductors and an absence of positive sequence current components in the ground conductors. In response to the broken ground conductor being sensed, power conductors are open circuited. The sequence components are sensed with a network including a channel responsive to the current induced in each ground conductor. Each channel includes a current transformer for deriving an A.C. voltage that is a replica of the induced current for the conductor of the particular channel. The network includes operational amplifiers responsive to the voltages derived from the current transformers. Each operational amplifier includes an input circuit including a series resistor and capacitor, as well as a feedback resistor, to provide 240.degree. phase shift between its input and output voltages.

    Abstract translation: 通过感测在接地导体中感应出的负序电流分量来检测具有单独的电源导体和相等数量的对称间隔的接地导线的多相交流电缆中的接地导体断裂。 响应于断开的三相电缆的两个或更多个接地导体，通过感测一个电力导体中的电流和接地导体中没有正序电流分量来检测断路。 响应于感测到的断开的接地导体，电源导体开路。 用包括响应每个接地导体中感应的电流的通道的网络来感测序列分量。 每个通道包括用于导出作为特定通道的导体的感应电流的副本的交流电压的电流互感器。 该网络包括响应于从电流互感器得到的电压的运算放大器。 每个运算放大器包括一个包括串联电阻器和电容器的输入电路以及一个反馈电阻器，以在其输入和输出电压之间提供240°的相移。

    NON-INVASIVE ANALYTE SENSING SYSTEM AND METHOD
    26.
    发明申请
    NON-INVASIVE ANALYTE SENSING SYSTEM AND METHOD 有权
    非入侵分析仪感测系统及方法

    公开(公告)号：US20130281806A1

    公开(公告)日：2013-10-24

    申请号：US13823903

    申请日：2011-09-30

    Applicant: Govind Rao ,  Yordan Kostov ,  Xudong Ge ,  Leah Tolosa ,  Hyung Woo ,  Rose Viscardi

    Inventor： Govind Rao ,  Yordan Kostov ,  Xudong Ge ,  Leah Tolosa ,  Hyung Woo ,  Rose Viscardi

    IPC: A61B5/1455

    CPC classification number: A61B5/14552 ,  A61B5/6807 ,  A61B5/6829

    Abstract: A non-invasive gas analyte sensing and monitoring system and method is provided that is particularly applicable to transcutaneous monitoring of arterial blood gases in a mammal. The system and method relies on diffusion of the analyte to be measured into a diffusion chamber and remote sensing of the analyte in the diffusion chamber using optical chemical sensors and associated optoelectronics.

    Abstract translation: 提供一种非侵入性气体分析物感测和监测系统和方法，其特别适用于哺乳动物的动脉血气的经皮监测。 该系统和方法依赖于待测量分析物扩散到扩散室中，并使用光学化学传感器和相关联的光电子学来远程检测扩散室中的分析物。

    INTEGRATED OXYGEN MEASUREMENT AND CONTROL FOR STATIC CULTURE VESSELS
    28.
    发明申请
    INTEGRATED OXYGEN MEASUREMENT AND CONTROL FOR STATIC CULTURE VESSELS 审中-公开
    一体化氧气测量和静态文化船的控制

    公开(公告)号：US20110065084A1

    公开(公告)日：2011-03-17

    申请号：US12991947

    申请日：2009-05-12

    Applicant: Govind Rao ,  Yordan Kostov

    Inventor： Govind Rao ,  Yordan Kostov

    IPC: C12Q3/00 ,  C12M1/36

    CPC classification number: C12M27/16 ,  C12M23/08 ,  C12M41/34

    Abstract: A system and method for measuring and controlling oxygen in a culture vessel utilizes a non-invasive oxygen sensor and an agitator. A controller controls the agitator based on feedback supplied by the oxygen sensor. The agitator is used to increase oxygen transport into the liquid phase thereby raising the level of oxygen in the culture medium. The agitator driven equilibration results in precise control of the culture medium oxygen.

    Abstract translation: 用于测量和控制培养容器中的氧气的系统和方法利用非侵入性氧传感器和搅拌器。 控制器根据氧传感器提供的反馈来控制搅拌器。 搅拌器用于增加氧气输送到液相中，从而提高培养基中的氧气含量。 搅拌器驱动的平衡导致培养基氧气的精确控制。

    Ratiometric fluorescent pH sensor for non-invasive monitoring
    29.
    发明申请
    Ratiometric fluorescent pH sensor for non-invasive monitoring 有权
    比例式荧光pH传感器，用于非侵入性监测

    公开(公告)号：US20050090014A1

    公开(公告)日：2005-04-28

    申请号：US10609720

    申请日：2003-06-30

    Applicant: Govind Rao ,  Iordan Kostov ,  Haley Kermis ,  Peter Harms

    Inventor： Govind Rao ,  Iordan Kostov ,  Haley Kermis ,  Peter Harms

    IPC: G01N21/64 ,  G01N31/22

    CPC classification number: G01N21/6428 ,  C09B57/001 ,  G01N31/221

    Abstract: The present invention provides ratiometric fluorescent pH sensors for non-invasive, continuous monitoring of pH in such applications as fermentation processes. The ratiometric fluorescent pH sensors comprise a fluorescent dye that exhibits a shift in excitation wavelength with a corresponding shift in pH in the local environment of said fluorescent dye. Ratiometric measurements of the emission intensities at dual excitation maxima correlate to pH. Also provided is a fluorescent dye 6-methacryloyl-8-hydroxy-1,3-pyrene disulfonic acid (MA-HPDS). Further provided are systems and methods to non-invasively and continuously monitor pH.

    Abstract translation: 本发明提供了比例式荧光pH传感器，用于在诸如发酵过程的应用中非侵入性，连续监测pH。 比例荧光pH传感器包括荧光染料，其在所述荧光染料的局部环境中具有相应的pH偏移的激发波长的移动。 双重激发最大值的发射强度的比例测量与pH相关。 还提供了6-甲基丙烯酰基-8-羟基-1,3-芘二磺酸荧光染料（MA-HPDS）。 还提供了非侵入性和连续监测pH的系统和方法。

    Ratiometric fluorometer
    30.
    发明授权
    Ratiometric fluorometer 失效
    比例荧光计

    公开(公告)号：US06563585B1

    公开(公告)日：2003-05-13

    申请号：US09449671

    申请日：1999-11-30

    Applicant: Govind Rao ,  Yordan Kostov

    Inventor： Govind Rao ,  Yordan Kostov

    IPC: G01N2100

    CPC classification number: G01N21/6428 ,  G01N21/645 ,  G01N2021/6419 ,  G01N2021/6421

    Abstract: A method and apparatus for measuring the concentration of various analytes in a sample using native fluorescence is described. A first light source for producing a first light having a first wavelength is directed at the sample to produce a first emission from the sample, a second light source for producing a second light having a second wavelength is directed at the sample to produce a second emission from the sample. A detecting device for detecting the first and second emissions emitted from the sample, and a controlling device responsive to the detecting device for alternately switching between the first and second light source so that only one light source is directing light at the sample at any one time are employed to excite emissions from the sample to be analyzed. An analyzing device that is responsive to the controlling device for producing a duty ratio is used to determine the analytic concentration of the specific analyte present in the sample.

    Abstract translation: 描述了使用天然荧光测量样品中各种分析物的浓度的方法和装置。 用于产生具有第一波长的第一光的第一光源被引导到样品以产生来自样品的第一发射，用于产生具有第二波长的第二光的第二光源被引导到样品以产生第二发射 从样品。 一种用于检测从样本发射的第一和第二发射的检测装置，以及响应于检测装置的控制装置，用于在第一和第二光源之间交替切换，使得只有一个光源在任何一个时间引导光在样品上 被用来激发待分析样品的排放。 使用响应于用于产生占空比的控制装置的分析装置来确定样品中存在的特定分析物的分析浓度。

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