公开(公告)号：US07381954B2

公开(公告)日：2008-06-03

申请号：US11162967

申请日：2005-09-29

申请人： Ayan Banerjee ,  Chayan Mitra ,  Mark A. Woodmansee

发明人： Ayan Banerjee ,  Chayan Mitra ,  Mark A. Woodmansee

IPC分类号： G01J5/02

CPC分类号： G01N21/39 ,  G01N21/3504 ,  G01N21/3554 ,  G01N2021/158 ,  G01N2021/354

摘要： Determination of steam quality by passing one or more laser beams through steam in a steam chamber and directly determining a total number of vapor molecules and a total number of water molecules based on absorption of radiation in the one or more laser beams by the water vapor phase and the liquid water phase in the steam. Specific volumes of water vapor phase and liquid water phase in the steam using the total numbers of water vapor and liquid water molecules are determined and the quality of the steam is calculated based on the specific volumes of the water vapor phase and the liquid water phase in steam. One embodiment comprises a narrow linewidth laser for measuring steam quality and another embodiment comprises multiple broadband lasers for measuring steam quality.

摘要翻译： 通过使一个或多个激光束通过蒸汽室中的蒸汽来确定蒸汽质量，并且基于通过水蒸气相在一个或多个激光束中的辐射的吸收直接确定蒸汽分子的总数和总分子数 和蒸汽中的液态水相。 确定蒸汽中水蒸气相和液态水相的体积，使用水蒸汽和液态水分子的总数，并根据水汽相和液态水相的体积计算蒸汽的质量 蒸汽。 一个实施例包括用于测量蒸汽质量的窄线宽激光器，另一个实施例包括用于测量蒸汽质量的多个宽带激光器。

公开(公告)号：US08702302B2

公开(公告)日：2014-04-22

申请号：US12880681

申请日：2010-09-13

申请人： Vivek Venugopal Badami ,  Scott Mordin Hoyte ,  Chayan Mitra ,  Ayan Banerjee

发明人： Vivek Venugopal Badami ,  Scott Mordin Hoyte ,  Chayan Mitra ,  Ayan Banerjee

IPC分类号： G01K7/00

CPC分类号： G01K13/02 ,  G01J3/108 ,  G01J3/427 ,  G01K11/12 ,  G01K2013/024

摘要： A combustion gas measurement apparatus mounted in a gas turbine including: a tunable laser generating a radiation beam passing through a combustion gas path; a controller tuning the laser to emit radiation having at least a first selected wavelength and a second selected wavelength which both correspond to temperature-dependent transitions of a combustion species of the gas, wherein the first selected wavelength and the second selected wavelength are not near absorption peaks of neighboring wavelengths; a detector sensing the radiation beam passing through the combustion gas and generating an absorption signal indicative of an absorption of the beam by the combustion gas at each of the first wavelength and the second wavelength, and a processor executing a program stored on a non-transitory storage medium determining a combustion gas temperature based on a ratio of the adoption signals for the first wavelength and the second wavelength.

摘要翻译： 一种安装在燃气轮机中的燃烧气体测量装置，包括：可调谐激光器，其产生通过燃烧气体路径的辐射束; 调谐所述激光器以发射具有至少第一选定波长和第二选定波长的辐射的控制器，其对应于所述气体的燃烧物质的温度依赖性跃迁，其中所述第一选定波长和所述第二选定波长不接近吸收 相邻波长的峰; 检测器，其感测通过燃烧气体的辐射束，并且产生指示在第一波长和第二波长中的每一个处由燃烧气体吸收光束的吸收信号，以及处理器，其执行存储在非瞬时的程序 存储介质基于第一波长和第二波长的采用信号的比率来确定燃烧气体温度。

公开(公告)号：US07345280B2

公开(公告)日：2008-03-18

申请号：US11162969

申请日：2005-09-29

申请人： Chayan Mitra ,  Mark A Woodmansee ,  Ayan Banerjee

发明人： Chayan Mitra ,  Mark A Woodmansee ,  Ayan Banerjee

IPC分类号： G01J5/02

CPC分类号： G01N21/39 ,  G01N21/3504 ,  G01N2021/354

摘要： Determination of steam quality by passing one or more laser beams through steam in a steam chamber and directly determining a total number of vapor molecules and a total number of water molecules based on absorption of radiation in the one or more laser beams by the water vapor phase and the liquid water phase in the steam. Specific volumes of water vapor phase and liquid water phase in the steam using the total numbers of water vapor and liquid water molecules are determined and the quality of the steam is calculated based on the specific volumes of the water vapor phase and the liquid water phase in steam. One embodiment comprises a narrow linewidth laser for measuring steam quality and another embodiment comprises multiple broadband lasers for measuring steam quality.

摘要翻译： 通过使一个或多个激光束通过蒸汽室中的蒸汽来确定蒸汽质量，并且基于通过水蒸气相在一个或多个激光束中的辐射的吸收直接确定蒸汽分子的总数和总分子数 和蒸汽中的液态水相。 确定蒸汽中水蒸气相和液态水相的体积，使用水蒸汽和液态水分子的总数，并根据水汽相和液态水相的体积计算蒸汽质量 蒸汽。 一个实施例包括用于测量蒸汽质量的窄线宽激光器，另一个实施例包括用于测量蒸汽质量的多个宽带激光器。

公开(公告)号：US20070069131A1

公开(公告)日：2007-03-29

申请号：US11162967

申请日：2005-09-29

申请人： Ayan Banerjee ,  Chayan Mitra ,  Mark Woodmansee

发明人： Ayan Banerjee ,  Chayan Mitra ,  Mark Woodmansee

IPC分类号： G01J5/02

CPC分类号： G01N21/39 ,  G01N21/3504 ,  G01N21/3554 ,  G01N2021/158 ,  G01N2021/354

摘要： Determination of steam quality by passing one or more laser beams through steam in a steam chamber and directly determining a total number of vapor molecules and a total number of water molecules based on absorption of radiation in the one or more laser beams by the water vapor phase and the liquid water phase in the steam. Specific volumes of water vapor phase and liquid water phase in the steam using the total numbers of water vapor and liquid water molecules are determined and the quality of the steam is calculated based on the specific volumes of the water vapor phase and the liquid water phase in steam. One embodiment comprises a narrow linewidth laser for measuring steam quality and another embodiment comprises multiple broadband lasers for measuring steam quality.

摘要翻译： 通过使一个或多个激光束通过蒸汽室中的蒸汽来确定蒸汽质量，并且基于通过水蒸气相在一个或多个激光束中的辐射的吸收直接确定蒸汽分子的总数和总分子数 和蒸汽中的液态水相。 确定蒸汽中水蒸气相和液态水相的体积，使用水蒸汽和液态水分子的总数，并根据水汽相和液态水相的体积计算蒸汽的质量 蒸汽。 一个实施例包括用于测量蒸汽质量的窄线宽激光器，另一个实施例包括用于测量蒸汽质量的多个宽带激光器。

公开(公告)号：US08587660B2

公开(公告)日：2013-11-19

申请号：US12847909

申请日：2010-07-30

申请人： Chayan Mitra ,  Munish Vishwas Inamdar ,  Vinay Bhaskar Jammu ,  Vinod Padmanabhan Kumar ,  Kunal Ravindra Goray ,  Achalesh Kumar Pandey ,  Ravi Yoganatha Babu ,  Sheri George ,  Bhasker Rao Keely

发明人： Chayan Mitra ,  Munish Vishwas Inamdar ,  Vinay Bhaskar Jammu ,  Vinod Padmanabhan Kumar ,  Kunal Ravindra Goray ,  Achalesh Kumar Pandey ,  Ravi Yoganatha Babu ,  Sheri George ,  Bhasker Rao Keely

IPC分类号： H04N7/18

CPC分类号： H04N7/18 ,  G01N29/0654

摘要： A system is disclosed that includes an image recording assembly for recording images of a stator vane of a compressor and a mechanism configured to magnetically couple the image recording assembly to a rotor blade of a compressor. Additional systems are provided that include image recording assemblies. Methods implementing the disclosed systems are also provided.

摘要翻译： 公开了一种系统，其包括用于记录压缩机的定子叶片的图像的图像记录组件和被配置为将图像记录组件磁耦合到压缩机的转子叶片的机构。 提供了包括图像记录组件的附加系统。 还提供了实现所公开的系统的方法。

公开(公告)号：US20130050680A1

公开(公告)日：2013-02-28

申请号：US13216439

申请日：2011-08-24

申请人： Vivek Venugopal Badami ,  Chayan Mitra

发明人： Vivek Venugopal Badami ,  Chayan Mitra

IPC分类号： G01N21/17 ,  G01N21/00

CPC分类号： G01L11/02 ,  G01L19/0092 ,  G01L23/16

摘要： A system for measuring a dynamic pressure in a gas using a tunable diode laser. The system of this aspect includes a laser transmission system that includes the tunable diode laser and configured to transmit laser light created by the tunable diode laser through the gas and a laser receiving system configured to receive the laser light after it has passed through the gas to create absorption peaks from the received laser light. The laser receiving system is configured to estimate a change in pressure based on an expansion of one of the absorption peaks.

摘要翻译： 一种使用可调谐二极管激光器测量气体中的动态压力的系统。 该方面的系统包括激光传输系统，其包括可调谐二极管激光器并且被配置为透射通过气体传输由可调谐二极管激光器产生的激光;以及激光接收系统，其被配置为在其通过气体之后接收激光， 从接收到的激光产生吸收峰。 激光接收系统被配置为基于吸收峰之一的膨胀来估计压力变化。

公开(公告)号：US20140075954A1

公开(公告)日：2014-03-20

申请号：US13617192

申请日：2012-09-14

申请人： Nilesh Tralshawala ,  Robert Joseph Iasillo ,  Chayan Mitra ,  Robert Frank Hoskin

发明人： Nilesh Tralshawala ,  Robert Joseph Iasillo ,  Chayan Mitra ,  Robert Frank Hoskin

IPC分类号： F02C7/00

CPC分类号： G01M15/10 ,  G01M15/14

摘要： Methods and systems for substance profile measurements in gas turbine exhaust. In an embodiment, a concentration of a substance may be determined and associated with a combustor out of a plurality of combustors. An alert may be transmitted in reference to the combustor when the concentration of the substance crosses a threshold level.

摘要翻译： 燃气轮机排气中物质分布测量的方法和系统。 在一个实施方案中，可以确定物质的浓度并与多个燃烧器中的燃烧器相关联。 当物质的浓度超过阈值水平时，可以参考燃烧器传送警报。

公开(公告)号：US20120026306A1

公开(公告)日：2012-02-02

申请号：US12847909

申请日：2010-07-30

申请人： Chayan Mitra ,  Munish Vishwas Inamdar ,  Vinay Bhaskar Jammu ,  Vinod Padmanabhan Kumar ,  Kunal Ravindra Goray ,  Achalesh Kumar Pandey ,  Ravi Yoganatha Babu ,  Sheri George ,  Bhasker Rao Keely

发明人： Chayan Mitra ,  Munish Vishwas Inamdar ,  Vinay Bhaskar Jammu ,  Vinod Padmanabhan Kumar ,  Kunal Ravindra Goray ,  Achalesh Kumar Pandey ,  Ravi Yoganatha Babu ,  Sheri George ,  Bhasker Rao Keely

IPC分类号： H04N7/18

CPC分类号： H04N7/18 ,  G01N29/0654

摘要： A system is disclosed that includes an image recording assembly for recording images of a stator vane of a compressor and a mechanism configured to magnetically couple the image recording assembly to a rotor blade of a compressor. Additional systems are provided that include image recording assemblies. Methods implementing the disclosed systems are also provided.

摘要翻译： 公开了一种系统，其包括用于记录压缩机的定子叶片的图像的图像记录组件和被配置为将图像记录组件磁耦合到压缩机的转子叶片的机构。 提供了包括图像记录组件的附加系统。 还提供了实现所公开的系统的方法。

公开(公告)号：US08602722B2

公开(公告)日：2013-12-10

申请号：US12714207

申请日：2010-02-26

申请人： Sheri George ,  Vinay Bhaskar Jammu ,  Vinod Padmanabhan Kumar ,  Chayan Mitra ,  Kunal Ravindra Goray ,  Achalesh Kumar Pandey ,  Ravi Yoganatha Babu ,  Bhasker Rao Keely ,  Munish Vishwas Inamdar

发明人： Sheri George ,  Vinay Bhaskar Jammu ,  Vinod Padmanabhan Kumar ,  Chayan Mitra ,  Kunal Ravindra Goray ,  Achalesh Kumar Pandey ,  Ravi Yoganatha Babu ,  Bhasker Rao Keely ,  Munish Vishwas Inamdar

IPC分类号： F01D25/00

CPC分类号： F01D21/003 ,  F01D25/285 ,  F05D2260/80 ,  F05D2270/8041 ,  G01N21/954 ,  G01N2021/8887 ,  Y02T50/671

摘要： Embodiments of the invention include an inspection system to inspect internal components of a compressor of a gas turbine engine. The inspection system includes an image recording assembly having one or more image recording devices, light sources, storage devices, and power supplies. The image recording assembly may be inserted into a compressor without removal of the compressor housing or disassembly of the compressor. The image recording assembly may be removably coupled to a rotary component of the compressor, e.g., a rotor blade, and used to record images of stationary components, e.g., stator vanes, of the compressor. The images may be inspected to identify wear and/or defects in the stationary components, e.g., stator vanes.

摘要翻译： 本发明的实施例包括检查燃气涡轮发动机的压缩机的内部部件的检查系统。 检查系统包括具有一个或多个图像记录装置，光源，存储装置和电源的图像记录组件。 图像记录组件可以插入压缩机中，而不需要拆除压缩机壳体或压缩机的拆卸。 图像记录组件可以可拆卸地联接到压缩机的旋转部件，例如转子叶片，并用于记录压缩机的静止部件（例如定子叶片）的图像。 可以检查图像以识别固定部件（例如定子叶片）中的磨损和/或缺陷。

公开(公告)号：US07181972B2

公开(公告)日：2007-02-27

申请号：US11023202

申请日：2004-12-27

申请人： Samhita Dasgupta ,  Jeffrey Bernard Fortin ,  Steven Francis LeBoeuf ,  Vinayak Tilak ,  Chayan Mitra ,  Kanakasabapathi Subramanian ,  Steven Alfred Tysoe

发明人： Samhita Dasgupta ,  Jeffrey Bernard Fortin ,  Steven Francis LeBoeuf ,  Vinayak Tilak ,  Chayan Mitra ,  Kanakasabapathi Subramanian ,  Steven Alfred Tysoe

IPC分类号： G01L9/00

CPC分类号： G01H9/00 ,  G01L1/142 ,  G01L1/18 ,  G01L9/0052 ,  G01L9/0073 ,  G01L9/0075 ,  G01L9/008 ,  G01L9/08 ,  G01L19/04

摘要： A sensor, in accordance with aspects of the present technique, is provided. The sensor comprises a membrane formed of gallium nitride. The membrane is disposed on a substrate, which is wet-etched to form a closed cavity. The membrane exhibits both a capacitive response and a piezo-response to an external stimulus. The sensor further includes a circuit for measuring at least one of the capacitive response or the piezo-response. In certain aspects, the sensor may be operable to measure external stimuli, such as, pressure, force and mechanical vibration.

摘要翻译： 提供了根据本技术方面的传感器。 传感器包括由氮化镓形成的膜。 膜被布置在衬底上，其被湿蚀刻以形成闭合腔。 膜对外部刺激具有电容响应和压电响应。 传感器还包括用于测量电容响应或压电响应中的至少一个的电路。 在某些方面，传感器可操作以测量外部刺激，例如压力，力和机械振动。