公开(公告)号：US20230280230A1

公开(公告)日：2023-09-07

申请号：US17685522

申请日：2022-03-03

Applicant: ABB Schweiz AG

Inventor： John B. Leen ,  Joseph E. Thomaz ,  Douglas S. Baer

IPC: G01M3/04 ,  G01C21/16 ,  G01P15/08 ,  G01C19/00 ,  G01P5/02 ,  G01P15/18

CPC classification number: G01M3/04 ,  G01C21/16 ,  G01P15/08 ,  G01C19/00 ,  G01P5/02 ,  G01P15/18

Abstract: A system, method, and apparatus are provided for estimating a flux of fugitive gas emissions. The method is performed using a gas analyzer coupled to a sampling wand, where gas enters the inlet tip of the sampling wand prior to being sampled by the gas analyzer. The sampling wand is fixed to a mobile device that includes an inertial measurement unit. Location information from the inertial measurement unit is used to compile a high resolution geo-spatial map of gas concentration levels across a cross-sectional area of a gas plume. A near-field Gaussian plume inversion calculation is then performed to estimate the flux based on the gas concentration data and the location information.

公开(公告)号：US11867623B2

公开(公告)日：2024-01-09

申请号：US17668046

申请日：2022-02-09

Applicant: ABB Schweiz AG

Inventor： John B. Leen ,  Dylan R. Rittman ,  Kyle G Owen ,  Douglas S. Baer

IPC: G01N21/39 ,  G01N21/3504

CPC classification number: G01N21/39 ,  G01N21/3504 ,  G01N2021/3509 ,  G01N2021/391

Abstract: A cavity enhanced absorption spectroscopy (CEAS) system is provided that utilizes collimators the incorporate gradient index (GRIN) lenses in lieu of conventional spherical or aspheric refractive lenses. The use of smaller diameter GRIN lenses facilitates a reduced initial beam size entering the sample cavity, which reduces self-interference noise and increases a signal to noise ratio of the measurements. Further, a reduced size and mass of the GRIN lens can reduce a size of the mounting hardware utilized to mount the optical components, which enables more laser beams to be coupled to a single gas cell compared to a similar gas cell integrated with conventional refractive collimators. A larger number of lasers enables more gas peaks to be measured substantially simultaneously using the CEAS system.

公开(公告)号：US12050155B2

公开(公告)日：2024-07-30

申请号：US17685522

申请日：2022-03-03

Applicant: ABB Schweiz AG

Inventor： John B. Leen ,  Joseph E. Thomaz ,  Douglas S. Baer

IPC: G01M3/04 ,  F17D5/00 ,  F17D5/02 ,  G01C19/00 ,  G01C21/16 ,  G01M3/26 ,  G01N33/00 ,  G01P5/02 ,  G01P15/08 ,  G01P15/18

CPC classification number: G01M3/04 ,  F17D5/005 ,  F17D5/02 ,  G01C19/00 ,  G01C21/16 ,  G01C21/165 ,  G01M3/26 ,  G01N33/0009 ,  G01P5/02 ,  G01P15/08 ,  G01P15/18

Abstract: A system, method, and apparatus are provided for estimating a flux of fugitive gas emissions. The method is performed using a gas analyzer coupled to a sampling wand, where gas enters the inlet tip of the sampling wand prior to being sampled by the gas analyzer. The sampling wand is fixed to a mobile device that includes an inertial measurement unit. Location information from the inertial measurement unit is used to compile a high resolution geo-spatial map of gas concentration levels across a cross-sectional area of a gas plume. A near-field Gaussian plume inversion calculation is then performed to estimate the flux based on the gas concentration data and the location information.

公开(公告)号：US20230251191A1

公开(公告)日：2023-08-10

申请号：US17668046

申请日：2022-02-09

Applicant: ABB Schweiz AG

Inventor： John B. Leen ,  Dylan R. Rittman ,  Kyle G. Owen ,  Douglas S. Baer

IPC: G01N21/39 ,  G01N21/3504

CPC classification number: G01N21/39 ,  G01N21/3504 ,  G01N2021/391 ,  G01N2021/3509

Abstract: A cavity enhanced absorption spectroscopy (CEAS) system is provided that utilizes collimators the incorporate gradient index (GRIN) lenses in lieu of conventional spherical or aspheric refractive lenses. The use of smaller diameter GRIN lenses facilitates a reduced initial beam size entering the sample cavity, which reduces self-interference noise and increases a signal to noise ratio of the measurements. Further, a reduced size and mass of the GRIN lens can reduce a size of the mounting hardware utilized to mount the optical components, which enables more laser beams to be coupled to a single gas cell compared to a similar gas cell integrated with conventional refractive collimators. A larger number of lasers enables more gas peaks to be measured substantially simultaneously using the CEAS system.