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    • 7. 发明授权
    • Particle analysis system and method
    • 粒子分析系统及方法
    • US5818583A
    • 1998-10-06
    • US747112
    • 1996-11-08
    • Eva Sevick-MuracaJoseph PierceHuabei JiangJeffery Kao
    • Eva Sevick-MuracaJoseph PierceHuabei JiangJeffery Kao
    • G01N15/02G01N21/49G01N21/51
    • G01N21/49G01N15/0205
    • A system and method are disclosed for the self-calibrating, on-line determination of size distribution and volume fraction of a number of particles dispersed in a medium by detecting multiply scattered light from the particles. The multiply scattered light is re-emitted in response to exposure to a light source configured to provide light of time varying intensity at selected wavelengths. The determination includes calculating the isotropic scattering coefficient for the particles at each of a number of wavelengths from the multiply scattered light as a function of an intensity modulation phase shift, and iteratively estimating the size distribution and volume fraction as a function of the isotropic scattering coefficient for each of the wavelengths. An estimation approach based on an expected form of the distribution and the mass of the particles is also disclosed.
    • 公开了一种系统和方法,用于通过检测来自颗粒的多散射光来自动校准,在线确定分散在介质中的多个颗粒的尺寸分布和体积分数。 多次散射光响应于被配置成在所选择的波长处提供时变强度的光的光源而被重新发射。 该确定包括计算来自多个散射光的多个波长中的每一个处的粒子的各向同性散射系数作为强度调制相移的函数,并且迭代地估计作为各向同性散射系数的函数的尺寸分布和体积分数 对于每个波长。 还公开了基于颗粒的分布和质量的预期形式的估计方法。
    • 9. 发明授权
    • Particle analysis system and method
    • 粒子分析系统及方法
    • US07187441B1
    • 2007-03-06
    • US09297895
    • 1997-11-07
    • Eva Sevick-MuracaJoseph PierceSteven RichterRajesh ShindeGanesh BalgiJeffrey KaoHuabei Jiang
    • Eva Sevick-MuracaJoseph PierceSteven RichterRajesh ShindeGanesh BalgiJeffrey KaoHuabei Jiang
    • G01N21/51
    • G01N21/49G01N15/0205
    • A system (20) and method are disclosed for the self-calibrating, on-line determination of size distribution f(x) and volume fraction φ of a number of particles (P) dispersed in a medium (M) by detecting one or more propagation characteristics of multiply scattered light from the particles (P). The multiply scattered light is re-emitted in response to exposure to a light source (21) configured to provide light at selected wavelengths. The determination includes calculating the isotropic scattering and absorption coefficients for the particles (P) by comparing the incident and detected light to determine a measurement corresponding to the propagation time through the scattering medium (M), and iteratively estimating the size distribution f(x) and volume fraction φ as a function of the coefficients for each of the wavelengths. An estimation approach based on an expected form of the distribution and the mass of the particles is also disclosed. Furthermore, techniques to determine a particle structure factor indicative of particle-to-particle interactions which vary with particle concentration and influence light scattering at high concentrations is disclosed.
    • 公开了用于自动校准,在线确定分散在介质中的多个颗粒(P)的尺寸分布f(x)和体积分数phi的系统(20)和方法( M),通过检测来自颗粒(P)的多个散射光的一个或多个传播特性。 响应于暴露于被配置为提供所选波长的光的光源(21),多次散射光被重新发射。 确定包括通过比较入射光和检测光来计算颗粒(P)的各向同性散射和吸收系数,以确定对应于通过散射介质的传播时间的测量( M),并且迭代地 估计尺寸分布f(x)和体积分数phi作为每个波长的系数的函数。 还公开了基于颗粒的分布和质量的预期形式的估计方法。 此外,公开了确定指示随着粒子浓度变化并影响高浓度下的光散射的粒子与粒子相互作用的粒子结构因子的技术。