公开(公告)号：US20160356703A1

公开(公告)日：2016-12-08

申请号：US14730417

申请日：2015-06-04

Applicant: General Electric Company

Inventor： Chayan MITRA ,  Narendra Digamber JOSHI ,  Vinayak TILAK ,  Gordon Raymond SMITH ,  Eric YuHang FUNG ,  Sandip MAITY ,  Rachit SHARMA ,  Steven Keith HANDELSMAN

IPC: G01N21/3504 ,  G02B27/14

CPC classification number: G01N21/3504 ,  G01N21/85 ,  G01N33/0037 ,  G01N33/004 ,  G01N33/0054 ,  G01N2021/3129 ,  G01N2021/8578 ,  G02B27/141

Abstract: A gas detector and method are presented. The gas detector includes a launcher unit for coupling and merging light beams in mid-infrared and infrared wavelength ranges into a single light beam and directing the merged single light beam towards a gas flow path; a receiver unit for generating at least one photo detector current signal based on the light beam transmitted through the gas flow path; and a control unit for processing at least one photo detector current signal to measure concentration of the at least two gases present in the gas flow path.

Abstract translation: 提出了一种气体检测器和方法。 气体检测器包括用于将中红外和红外波长范围内的光束耦合并合并成单个光束并将合并的单个光束导向气体流动通道的发射单元; 接收器单元，用于基于透过气体流路的光束产生至少一个光电检测器电流信号; 以及控制单元，用于处理至少一个光电检测器电流信号，以测量气流路径中存在的至少两种气体的浓度。

公开(公告)号：US20180172554A1

公开(公告)日：2018-06-21

申请号：US15831801

申请日：2017-12-05

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Samhitha PALANGANDA POONACHA ,  Anish BEKAL ,  Rachit SHARMA ,  Chayan MITRA ,  Eric YuHang FUNG

IPC: G01M15/10 ,  G01N21/31

CPC classification number: G01M15/108 ,  G01J3/00 ,  G01J3/021 ,  G01J3/42 ,  G01J5/0014 ,  G01J5/602 ,  G01J2005/0081 ,  G01N21/31 ,  G01N2201/066

Abstract: A method for determining a multi-dimensional profile of at least one emission parameter corresponding to an exhaust emission of a combustion process is presented. The method includes emitting a laser beam in a plurality of directions through the exhaust emission. The laser beam includes a plurality of wavelengths and the exhaust emission is characterized by the plurality of emission parameters. The method further includes detecting a plurality of absorption spectrum signals for each of the plurality of directions and determining a plurality of single-dimensional profiles corresponding to the at least one emission parameter. Each of the plurality of single-dimensional profiles is determined based on the plurality of absorption spectrum signals corresponding to each respective direction of the plurality of directions. The method also includes generating the multi-dimensional profile corresponding to the at least one emission parameter based on the plurality of single-dimensional profiles.

公开(公告)号：US20170045454A1

公开(公告)日：2017-02-16

申请号：US15304247

申请日：2015-04-02

Applicant: General Electric Company

Inventor： Rachit SHARMA ,  Chayan MITRA ,  Vinayak TILAK

IPC: G01N21/65 ,  G01N33/00 ,  G01N21/03

CPC classification number: G01N21/65 ,  G01N21/03 ,  G01N21/031 ,  G01N21/0317 ,  G01N33/0027 ,  G01N2021/651 ,  G01N2201/06113 ,  G01N2201/062 ,  G01N2201/12

Abstract: A system is presented. The system includes an electromagnetic radiation source configured to generate a mode-matched electromagnetic radiation that irradiates a gas-mixture filled in a gas compartment at a determined pressure ‘P’ bars, an intensity enhancement mechanism that internally reflects the mode-matched electromagnetic radiation a plurality of times to achieve an effective intensity ‘E’, of reflected electromagnetic radiation in a region of interest, that is ‘N’ times an intensity of the mode-matched electromagnetic radiation, and a detection subsystem that analyses the gas-mixture based upon Raman scattered photons emitted from the region of interest, wherein a product of the ‘P’ and the ‘N’ is at least 30.

Abstract translation: 提出了一个系统。 该系统包括电磁辐射源，其被配置为产生模式匹配的电磁辐射，其以确定的压力“P”条照射填充在气室中的气体混合物，内部反映模式匹配的电磁辐射的强度增强机构 多次以实现感兴趣区域中的反射电磁辐射的有效强度“E”，即模式匹配电磁辐射的强度的“N”倍，以及基于以下的分析气体混合物的检测子系统 从感兴趣区域发射的拉曼散射光子，其中“P”和“N”的乘积为至少30。