Dynamic reconstruction of a calibration state of an absorption spectrometer
    6.
    发明授权
    Dynamic reconstruction of a calibration state of an absorption spectrometer 有权
    吸收光谱仪的校准状态的动态重建

    公开(公告)号:US08711357B2

    公开(公告)日:2014-04-29

    申请号:US13235105

    申请日:2011-09-16

    IPC分类号: G01N21/00

    摘要: A reference harmonic absorption curve of a laser absorption spectrometer, which can include a tunable or scannable laser light source and a detector, can have a reference curve shape and can include a first, second, or higher order harmonic signal of a reference signal generated by the detector in response to light passing from the laser light source through a reference gas or gas mixture. The reference gas or gas mixture can include one or more of a target analyte and a background gas expected to be present during analysis of the target analyte. The reference harmonic absorption curve can have been determined for the laser absorption spectrometer in a known or calibrated state. A test harmonic absorption curve having a test curve shape is compared with the reference harmonic absorption curve to detect a difference between the test curve shape and the reference curve shape. Operating and/or analytical parameters of the laser absorption spectrometer are adjusted to correct the test curve shape to reduce the difference between the test curve shape and the reference curve shape.

    摘要翻译: 可以包括可调谐或可扫描的激光光源和检测器的激光吸收光谱仪的参考谐波吸收曲线可以具有参考曲线形状,并且可以包括由第一,第二或更高次谐波信号产生的参考信号 检测器响应于从激光源通过参考气体或气体混合物的光。 参考气体或气体混合物可以包括目标分析物和预期在目标分析物的分析期间存在的背景气体中的一种或多种。 参考谐波吸收曲线可以在已知或校准状态下为激光吸收光谱仪确定。 将具有测试曲线形状的测试谐波吸收曲线与参考谐波吸收曲线进行比较,以检测测试曲线形状和参考曲线形状之间的差异。 调整激光吸收光谱仪的操作和/或分析参数以校正测试曲线形状,以减小测试曲线形状与参考曲线形状之间的差异。

    Chemical leak inspection system
    7.
    发明授权
    Chemical leak inspection system 有权
    化学品泄漏检测系统

    公开(公告)号:US08426813B2

    公开(公告)日:2013-04-23

    申请号:US13462609

    申请日:2012-05-02

    申请人: David W Furry

    发明人: David W Furry

    IPC分类号: G01J5/02

    摘要: A method of visually detecting a leak of a chemical emanating from a component includes aiming a passive infrared camera system towards the component; filtering an infrared image with an optical bandpass filter, the infrared image being that of the leak; after the infrared image passes through the lens and optical bandpass filter, receiving the filtered infrared image with an infrared sensor device; electronically processing the filtered infrared image received by the infrared sensor device to provide a visible image representing the filtered infrared image; and visually identifying the leak based on the visible image. The passive infrared camera system includes: a lens; a refrigerated portion including the infrared sensor device and the optical bandpass filter (located along an optical path between the lens and the infrared sensor device). At least part of a pass band for the optical bandpass filter is within an absorption band for the chemical.

    摘要翻译: 视觉检测从部件发出的化学物质的泄漏的方法包括将被动红外摄像机系统朝向部件瞄准; 用光学带通滤波器过滤红外图像,红外图像是泄漏的图像; 在红外图像通过透镜和光学带通滤光器之后,用红外传感器装置接收过滤的红外图像; 电子地处理由红外线传感器装置接收的滤波后的红外图像,以提供表示经滤波的红外图像的可视图像; 并基于可见图像目视识别泄漏。 被动红外摄像机系统包括:镜头; 包括红外线传感器装置和光学带通滤光器(沿着透镜和红外线传感器装置之间的光路定位)的冷藏部。 用于光学带通滤波器的通带的至少一部分在化学品的吸收带内。

    Method and apparatus for sample analysis

    公开(公告)号:US08347688B2

    公开(公告)日:2013-01-08

    申请号:US12578575

    申请日:2009-10-13

    申请人: Robert O'Brien

    发明人: Robert O'Brien

    IPC分类号: G01N30/04 G01N30/72

    摘要: Methods and systems for analyzing samples, such as gas samples, are described. One method comprises providing a gas sample, increasing pressure applied to the gas sample to compress the sample to a smaller volume and provide a pneumatically focused gas sample, and analyzing the pneumatically focused gas sample using any of a variety of analytical techniques. Also disclosed are systems for gas analysis, including systems for analysis of pneumatically focused, and thereby concentrated, gas samples and for analysis of particulate matter in gas samples. Analytical systems constructed within personal computer cases also are disclosed.

    Atmospheric gas detection apparatus and method
    9.
    发明授权
    Atmospheric gas detection apparatus and method 有权
    大气检测装置及方法

    公开(公告)号:US08158944B2

    公开(公告)日:2012-04-17

    申请号:US12552248

    申请日:2009-09-01

    IPC分类号: G01N21/35

    摘要: A method of detecting a target gas includes the step of traversing a target area with a gas-filter correlation radiometer having a field of view oriented towards the target area. The gas-filter correlation radiometer receives reflected radiation in a passband from the target area and produces gas-filter correlation radiometer signals from the received reflected radiation. A surface reflectivity spectral profile of the target area is determined. The presence of the target gas in the target area is then determined based upon the received reflected radiation and the surface reflectivity spectral profile of the target area.

    摘要翻译: 检测目标气体的方法包括用具有朝向目标区域的视场的气体滤波器相关辐射计横穿目标区域的步骤。 气体过滤器相关辐射计从目标区域接收通带中的反射辐射,并从接收到的反射辐射产生气体滤波器相关辐射计信号。 确定目标区域的表面反射光谱轮廓。 然后基于所接收的反射辐射和目标区域的表面反射光谱轮廓来确定目标区域中目标气体的存在。

    Remote sensing of gas leaks
    10.
    发明授权
    Remote sensing of gas leaks 有权
    气体泄漏遥感

    公开(公告)号:US07855367B2

    公开(公告)日:2010-12-21

    申请号:US10799444

    申请日:2004-03-12

    IPC分类号: G01N21/35

    CPC分类号: G01N21/3518 G01N2021/1793

    摘要: A gas filter correlation radiometer mounted on an aircraft is flown over a target area. The gas filter correlation radiometer is configured to detect ethane (C2H6) gas in the event of a gas leak. The gas filter correlation radiometer uses background radiation to detect ethane.

    摘要翻译: 安装在飞机上的气体过滤器相关辐射计在目标区域上飞行。 气体过滤器相关辐射计被配置为在气体泄漏的情况下检测乙烷(C 2 H 6)气体。 气体过滤器相关辐射计使用背景辐射检测乙烷。