公开(公告)号：US10948471B1

公开(公告)日：2021-03-16

申请号：US15996069

申请日：2018-06-01

Applicant: Picarro Inc.

Inventor： Sean MacMullin ,  Chris W. Relia ,  Aaron Van Pelt ,  Alex Balkanski ,  Yonggang He ,  Sze Tan ,  David Steele ,  Tim Clark

IPC: G01N33/00 ,  G01M3/04

Abstract: In some embodiments, data from multiple vehicle-based natural gas leak detection survey runs are used by computer-implemented machine learning systems to generate a list of natural gas leaks ranked by hazard level. A risk model embodies training data having known hazard levels, and is used to classify newly-discovered leaks. Hazard levels may be expressed by continuous variables, and/or probabilities that a given leak fits within a predefined category of hazard (e.g. Grades 1-3). Each leak is represented by a cluster of leak indications (peaks) originating from a common leak sources. Hazard-predictive features may include maximum, minimum, mean, and/or median CH4/amplitude of aggregated leak indications; estimated leak flow rate, determined from an average of leak indications in a cluster; likelihood of leak being natural gas based on other indicator data (e.g. ethane concentration); probability the leak was detected on a given pass; and estimated distance to leak source.

公开(公告)号：US09645077B2

公开(公告)日：2017-05-09

申请号：US14714658

申请日：2015-05-18

Applicant: Lawrence Livermore National Security, LLC ,  Picarro, Inc.

Inventor： Ted Ognibene ,  Graham Bench ,  Alan Daniel McCartt ,  Kenneth Turteltaub ,  Chris W. Rella ,  Sze Tan ,  John A. Hoffnagle ,  Nabil Saad ,  Eric Crosson

IPC: G01N21/00 ,  G01N21/31 ,  G01J3/42 ,  H01J49/00 ,  G01N21/39 ,  G01J3/28 ,  G01J3/02

CPC classification number: G01N21/3103 ,  G01J3/027 ,  G01J3/28 ,  G01J3/42 ,  G01N21/39 ,  G01N2021/391 ,  G01N2021/399 ,  H01J49/0086

Abstract: Optical spectrometer apparatus, systems, and methods for analysis of carbon-14 including a resonant optical cavity configured to accept a sample gas including carbon-14, an optical source configured to deliver optical radiation to the resonant optical cavity, an optical detector configured to detect optical radiation emitted from the resonant cavity and to provide a detector signal; and a processor configured to compute a carbon-14 concentration from the detector signal, wherein computing the carbon-14 concentration from the detector signal includes fitting a spectroscopic model to a measured spectrogram, wherein the spectroscopic model accounts for contributions from one or more interfering species that spectroscopically interfere with carbon-14.

公开(公告)号：US20160011101A1

公开(公告)日：2016-01-14

申请号：US14714658

申请日：2015-05-18

Applicant: Lawrence Livermore National Security, LLC ,  Picarro, Inc.

Inventor： Ted Ognibene ,  Graham Bench ,  Alan Daniel McCartt ,  Kenneth Turteltaub ,  Chris W. Rella ,  Sze Tan ,  John A. Hoffnagle ,  Nabil Saad ,  Eric Crosson

IPC: G01N21/31 ,  H01J49/04 ,  H01J49/00 ,  G01J3/42

CPC classification number: G01N21/3103 ,  G01J3/027 ,  G01J3/28 ,  G01J3/42 ,  G01N21/39 ,  G01N2021/391 ,  G01N2021/399 ,  H01J49/0086

Abstract: Optical spectrometer apparatus, systems, and methods for analysis of carbon-14 including a resonant optical cavity configured to accept a sample gas including carbon-14, an optical source configured to deliver optical radiation to the resonant optical cavity, an optical detector configured to detect optical radiation emitted from the resonant cavity and to provide a detector signal; and a processor configured to compute a carbon-14 concentration from the detector signal, wherein computing the carbon-14 concentration from the detector signal includes fitting a spectroscopic model to a measured spectrogram, wherein the spectroscopic model accounts for contributions from one or more interfering species that spectroscopically interfere with carbon-14.

Abstract translation: 用于分析碳-14的光谱仪装置，系统和方法，包括被配置为接受包含碳-14的样品气体的共振光学腔，构造成将光辐射传递到谐振光学腔的光源，被配置为检测 从谐振腔发射的光辐射并提供检测器信号; 以及处理器，被配置为从检测器信号计算碳-14浓度，其中从检测器信号计算碳-14浓度包括将光谱模型拟合到测量的光谱图，其中光谱模型考虑来自一个或多个干扰物种的贡献 光谱干扰碳-14。