公开(公告)号：WO2019089893A1

公开(公告)日：2019-05-09

申请号：PCT/US2018/058650

申请日：2018-11-01

Applicant: ABB SCHWEIZ AG ,  LEEN, John B. ,  KRAMER, Axel ,  DU, Xu

Inventor： LEEN, John B. ,  KRAMER, Axel ,  DU, Xu

IPC: G01J3/10 ,  G01J3/42 ,  G01N21/39 ,  G01N21/3504

CPC classification number: G01N21/3504 ,  G01J3/10 ,  G01J3/42 ,  G01N21/359 ,  G01N21/39 ,  G01N2021/399

Abstract: Systems and methods for measuring a value of constituents in a mixed constituent gas having at least one broad band absorber constituent therein and at least one lock constituent are provided. The system uses a combination of integrated cavity output spectroscopy and cavity ringdown spectroscopy to determine the measurement values of constituents in a cavity of a spectrometer. Cavity ringdown in the presence of the at least one broad band absorber constituent and a reference concentration value are used to determine the constituent measurement values when the spectral width of the laser tuning range is overlapped by the absorption band of the broad band absorber in the cavity.

公开(公告)号：EP3704454A1

公开(公告)日：2020-09-09

申请号：EP18815379.5

申请日：2018-11-01

Applicant: ABB Schweiz AG

Inventor： LEEN, John B. ,  KRAMER, Axel ,  DU, Xu

IPC: G01J3/10 ,  G01J3/42 ,  G01N21/39 ,  G01N21/3504

公开(公告)号：EP4239316A1

公开(公告)日：2023-09-06

申请号：EP23155334.8

申请日：2023-02-07

Applicant: ABB SCHWEIZ AG

Inventor： LEEN, John B. ,  RITTMAN, Dylan R. ,  OWEN, Kyle G. ,  BAER, Douglas S.

IPC: G01N21/31 ,  G01N21/03

Abstract: A cavity enhanced absorption spectroscopy (CEAS) system (200) is provided that utilizes collimators that incorporate gradient index (GRIN) lenses (212) in lieu of conventional spherical or aspheric refractive lenses (112). The use of smaller diameter GRIN lenses (212) facilitates a reduced initial beam size entering the sample cavity (206), 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 (212) can reduce a size of the mounting hardware (216) utilized to mount the optical components, which enables more laser beams to be coupled to a single gas cell (202) 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 (200).

公开(公告)号：EP4239306A1

公开(公告)日：2023-09-06

申请号：EP23159747.7

申请日：2023-03-02

Applicant: ABB SCHWEIZ AG

Inventor： LEEN, John B. ,  THOMAZ, Joseph E. ,  BAER, Douglas S.

IPC: G01M3/20 ,  G01M3/26 ,  F17D5/00 ,  F17D5/02 ,  G01C15/00

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.