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    • 8. 发明申请
    • METHODS OF CHARACTERIZING AND MEASURING PARTICULATE FILTER ACCUMULATION
    • 表征和测量颗粒过滤器累积的方法
    • US20100108890A1
    • 2010-05-06
    • US12582981
    • 2009-10-21
    • Natarajan GunasekaranVitor Marino SchneiderCharlene Marie SmithCarlo Anthony Kosik Williams
    • Natarajan GunasekaranVitor Marino SchneiderCharlene Marie SmithCarlo Anthony Kosik Williams
    • G01J5/02
    • G01N21/94G01N21/3504G01N21/3577G01N21/3581G01N2201/129
    • Methods of characterizing and measuring particulate accumulation in a family of particulate filters (10) are disclosed. The disclosure can be applied to diesel, gasoline and natural gas fueled engines, fluid streams bearing dust, and chemical and biological substances such as may be found in laboratory fluids, for example, air. In one embodiment, the disclosure is directed to measuring diesel particulate accumulation in a family of diesel particulate filters. The methods include measuring calibration complex terahertz transmission spectra (PC(f)) of at least a portion (17) of at least one particulate or diesel particulate filter in the family for different known particulate or diesel particulate amounts (ADP). The method also involves performing a partial least squares (PLS) analysis on the calibration complex terahertz transmission spectra to establish a calibration relationship between the complex terahertz transmission spectra and the particulate or diesel particulate amounts. The complex transmission spectrum of a subject particulate filter or diesel particulate filter having an unknown amount of particulate or diesel particulate accumulation is then determined and compared to the linear calibration relationship to establish a measured amount of particulates or diesel particulates. The methods include using a terahertz (THz) system (100) to obtain the complex terahertz transmission spectra for the calibration and subject particulate or diesel particulate filters.
    • 公开了在微粒过滤器(10)系列中表征和测量颗粒积聚的方法。 本公开可以应用于柴油,汽油和天然气燃料发动机,带有灰尘的流体流,以及诸如可以在实验室流体例如空气中发现的化学和生物物质。 在一个实施方案中,本公开涉及测量柴油颗粒过滤器系列中的柴油颗粒物积聚。 所述方法包括测量家族中至少一种颗粒或柴油颗粒​​过滤器的至少一部分(17)的校准复数太赫兹透射光谱(PC(f)),用于不同的已知颗粒或柴油颗粒​​量(ADP)。 该方法还涉及对校准复数太赫兹透射光谱进行偏最小二乘法(PLS)分析,以建立复数太赫兹透射光谱与颗粒或柴油颗粒​​量之间的校准关系。 然后确定具有未知量的颗粒或柴油颗粒​​物积聚的目标颗粒过滤器或柴油颗粒​​过滤器的复杂透射光谱,并将其与线性校准关系进行比较,以建立测量量的颗粒物或柴油颗粒​​物。 这些方法包括使用太赫兹(THz)系统(100)来获得用于校准和主体颗粒或柴油颗粒​​过滤器的复数太赫兹透射光谱。