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    • 8. 发明授权
    • Method and apparatus for identification of plastic materials by optical measurements
    • 用于通过光学测量识别塑料材料的方法和装置
    • US06563119B1
    • 2003-05-13
    • US09626609
    • 2000-07-27
    • Evangelos Zoidis
    • Evangelos Zoidis
    • G01J342
    • G01N21/31
    • The present invention relates to a method for identification of plastic materials of interest by optical measurements, preferably spectroscopic measurements, comprising the steps of measuring a sample and providing a sample spectrum, providing reference spectra for a given group of reference materials of interest, determining spectral distances between sample spectrum and reference spectra, material identification by associating the sample to the material having the reference spectrum with the smallest spectral distance to the sample spectrum. In this method at least one identification frequency range having a high absolute deviation ratio D and/or a high smoothed deviation ratio D′ between all pairs of possible plastic materials of interest is determined, and that said spectral distance is only determined within said at least one identification frequency range.
    • 本发明涉及通过光学测量,优选光谱测量来识别感兴趣的塑料材料的方法,包括以下步骤:测量样品并提供样品光谱,为给定的感兴趣的参考材料组提供参考光谱,确定光谱 样品光谱和参考光谱之间的距离,通过将样品与具有与样品光谱的最小光谱距离的参考光谱的材料相关联的材料鉴定。 在该方法中,确定具有高绝对偏差比D和/或所有目标可能的塑料材料对之间的高平滑偏差比D'的至少一个识别频率范围,并且所述光谱距离仅在所述至少 一个识别频率范围。
    • 9. 发明授权
    • Method for identification of plastic materials by optical measurements
    • 通过光学测量识别塑料材料的方法
    • US06555822B1
    • 2003-04-29
    • US09626659
    • 2000-07-27
    • Evangelos Zoidis
    • Evangelos Zoidis
    • G01J300
    • G01N21/31
    • Method for identification of plastic materials of interest by spectroscopic measurements, comprising the steps of measuring a sample and providing a sample spectrum; providing reference spectra for a given group of reference materials of interest, determining spectral distances between sample spectrum and reference spectra, material identification by associating the sample to the material having the reference spectrum with the smallest spectral distance to the sample spectrum. In this method a multi-level measurement is conducted, wherein in each level the number of possible materials is further limited. In a first level at least 2 sub-groups and in all levels starting with a second level at least one sub-group of possible materials are defined, wherein one sub-group in the first level comprises all possible materials that are easily distinguishable and at least one further sub-group in the first level comprises materials that are difficult to distinguish from each other. To each sub-group at least one identification frequency range is associated, and said spectral distances are only determined within said at least one identification frequency range in each relevant sub-group of each level and only with respect to reference spectra of materials being comprised in the relevant sub-group.
    • 用于通过光谱测量来识别感兴趣的塑料材料的方法,包括以下步骤:测量样品并提供样品光谱; 为给定的一组参考材料提供参考光谱,确定样品光谱和参考光谱之间的光谱距离,通过将样品与具有与样品光谱的最小光谱距离的参考光谱的材料相关联来进行材料鉴定。 在该方法中,进行多级测量,其中在每个级别中进一步限制可能材料的数量。 在第一级别中,至少2个子组和从所有级别开始的第二级别定义了至少一个可能材料的子组,其中第一级中的一个子组包括易于区分的所有可能的材料 第一级中的至少一个另外的子组包括彼此难以区分的材料。 对于每个子组,至少一个识别频率范围相关联,并且所述光谱距离仅在每个级别的每个相关子组中的所述至少一个识别频率范围内确定,并且仅关于包含在 相关小组。