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    Gas leak detection and event selection based on spatial concentration variability and other event properties
    12.
    发明申请
    Gas leak detection and event selection based on spatial concentration variability and other event properties 审中-公开
    基于空间浓度变异性和其他事件属性的气体泄漏检测和事件选择

    公开(公告)号：US20160011069A1

    公开(公告)日：2016-01-14

    申请号：US14326195

    申请日：2014-07-08

    Applicant: Picarro, Inc.

    Inventor： David Steele ,  Eric R. Crosson ,  Sze Meng Tan

    IPC: G01M3/00 ,  G01N33/00

    CPC classification number: G01N33/0004 ,  G01M3/22

    Abstract: This work provides event selection in the context of gas leak pinpointing using mobile gas concentration and atmospheric measurements. The main idea of the present approach is to use a moving minimum to estimate background gas concentration, as opposed to the conventional use of a moving average for this background estimation.

    Abstract translation: 这项工作提供了在使用移动气体浓度和大气测量的气体泄漏精确定位的情况下的事件选择。 本方法的主要思想是使用移动最小值来估计背景气体浓度，而不是传统使用移动平均值进行该背景估计。

    Gas detection systems and methods using search area indicators
    18.
    发明授权
    Gas detection systems and methods using search area indicators 有权
    气体检测系统和方法采用搜索区域指标

    公开(公告)号：US09557240B1

    公开(公告)日：2017-01-31

    申请号：US13733857

    申请日：2013-01-03

    Applicant: Picarro Inc.

    Inventor： Sze Meng Tan ,  Eric R. Crosson ,  Chris W. Rella

    IPC: G06F15/00 ,  G01M3/28 ,  G01M3/24 ,  G01M3/26

    CPC classification number: G01M3/2807 ,  F02M65/006 ,  G01M3/007 ,  G01M3/04 ,  G01M3/16 ,  G01M3/24 ,  G01M3/26 ,  G01M3/28 ,  G01M3/38 ,  G06F15/00 ,  G06F17/30241

    Abstract: In some embodiments, a computer system generates display content indicating a likely direction and estimated distance to a potential gas leak source. The content includes a street map and at least one search area indicator on the map that indicates a search area suspected to have a gas leak source. The search area indicator has an axis indicating a representative wind direction relative to a geo-referenced location of at least one gas concentration measurement point. The search area indicator also has a width relative to the axis. The width is indicative of a wind direction variability associated with a plurality of wind direction measurements in an area of the gas concentration measurement point. The axis also preferably has a length indicating an estimated maximum distance to the potential gas leak source.

    Abstract translation: 在一些实施例中，计算机系统产生指示潜在的气体泄漏源的可能方向和估计距离的显示内容。 该内容包括地图上的街道地图和至少一个搜索区域指示符，其指示怀疑具有气体泄漏源的搜索区域。 搜索区域指示器具有指示相对于至少一个气体浓度测量点的地理参考位置的代表风向的轴。 搜索区域指示符也具有相对于轴的宽度。 宽度表示与气体浓度测量点的区域中的多个风向测量相关联的风向变化。 该轴还优选具有指示到潜在气体泄漏源的估计最大距离的长度。

    Methods for gas leak detection and localization in populated areas using multi-point analysis
    19.
    发明授权
    Methods for gas leak detection and localization in populated areas using multi-point analysis 有权
    使用多点分析在人口稠密地区进行气体泄漏检测和定位的方法

    公开(公告)号：US09500556B2

    公开(公告)日：2016-11-22

    申请号：US13656123

    申请日：2012-10-19

    Applicant: Picarro, Inc.

    Inventor： Chris W. Rella ,  Eric R. Crosson ,  Sze Meng Tan

    IPC: G06F15/00 ,  G01M3/20 ,  G01N21/3504 ,  G01N21/39 ,  G01M3/38 ,  G01N21/03

    CPC classification number: G01M3/20 ,  G01M3/38 ,  G01N21/3504 ,  G01N21/39 ,  G01N2021/0314 ,  G01N2201/025

    Abstract: Improved gas leak detection from moving platforms is provided. Automatic horizontal spatial scale analysis can be performed in order to distinguish a leak from background levels of the measured gas. Source identification can be provided by using isotopic ratios and/or chemical tracers to distinguish gas leaks from other sources of the measured gas. Multi-point measurements combined with spatial analysis of the multi-point measurement results can provide leak source distance estimates. These methods can be practiced individually or in any combination.

    Abstract translation: 提供了从移动平台改进的气体泄漏检测。 可以进行自动水平空间尺度分析，以区分泄漏与被测气体的背景水平。 可以通过使用同位素比率和/或化学示踪剂来提供源识别，以区分气体泄漏与测量气体的其他来源。 多点测量结合多点测量结果的空间分析可以提供泄漏源距离估计。 这些方法可以单独或以任何组合实施。

    Cavity ring down spectroscopy using measured backward mode data
    20.
    发明授权
    Cavity ring down spectroscopy using measured backward mode data 有权
    使用测量的反向模式数据进行腔环衰减光谱

    公开(公告)号：US09116042B1

    公开(公告)日：2015-08-25

    申请号：US14015791

    申请日：2013-08-30

    Applicant: Picarro, Inc.

    Inventor： Yonggang He ,  Sze Meng Tan ,  Alejandro Dario Farinas

    IPC: G01J3/42

    CPC classification number: G01J3/42 ,  G01J3/0224 ,  G01J3/28 ,  G01N21/39

    Abstract: In cavity ring-down spectroscopy (CRDS), scattering into the backward mode of a traveling wave ring-down cavity can degrade conventional CRDS performance. We have found that this performance degradation can be alleviated by measuring the backward mode signal emitted from the ring-down cavity, and using this signal to improve the processing for extracting ring-down times from the measured data. For example, fitting an exponential to the sum of the intensities of the forward and backward signals often provides substantially better results for the ring-down time than fitting an exponential to the forward signal alone. Other possibilities include extracting cavity eigenmode signals from the forward and backward signals and performing separate exponential fits to the eigenmode signals. An optical circulator can be used to facilitate measurement of the backward mode signal.

    Abstract translation: 在空腔衰减光谱（CRDS）中，散射到行波衰减腔的向后模式可以降低传统的CRDS性能。 我们已经发现，通过测量从衰减腔发射的反向模式信号，并且使用该信号来改善从测量数据中提取衰落时间的处理，可以减轻性能下降。 例如，对于正向和反向信号的强度之和来拟合指数通常对于衰减时间提供比仅适合于正向信号的指数的更好的结果。 其他可能性包括从正向和反向信号提取腔本征模信号，并对本征模信号执行独立的指数拟合。 可以使用光循环器来促进反向模式信号的测量。

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