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1.发明授权
公开(公告)号：US5913235A
公开(公告)日：1999-06-15
申请号：US848582
申请日：1997-04-28
申请人： Petri Silenius , Matti Lindstrom , Philip Luner
发明人： Petri Silenius , Matti Lindstrom , Philip Luner
CPC分类号： G01N13/00 , G01N33/343 , G01N2013/003
摘要： The invention relates to a procedure for determining a quantity dependent on the rate of diffusion in the fibre wall for diffusion occurring through it, in which procedure a diffusible tracer is introduced into the fibres under measurement, the fibres are suspended in an aqueous phase and the tracer concentration is determined after a certain time has elapsed since the time of suspension of the fibres, and the quantity dependent on the rate of diffusion is calculated on the basis of the concentration and time.In addition, the invention relates to a procedure for determining the proportion of secondary fibre in a fibre suspension containing primary fibre and secondary fibre, in which procedure virtual diffusion coefficients are determined in the fibre wall for diffusion taking place through it in at least two fibre suspensions for which the proportions of primary and secondary fibre are known and in a fibre suspension under measurement, and that the proportion of secondary fibre in the suspension under measurement is estimated by assuming that the diffusion coefficient depends mainly linearly on the proportion of primary and secondary fibre in the fibre suspension.
摘要翻译： 本发明涉及一种用于根据纤维壁中通过其扩散发生的扩散速率确定量的方法，在该步骤中，将漫射示踪剂引入测量的纤维中，将纤维悬浮在水相中， 在纤维悬浮时间过去一段时间后测定示踪剂浓度，并且基于浓度和时间计算取决于扩散速率的量。 此外，本发明涉及一种用于确定含有初级纤维和二次纤维的纤维悬浮液中的次级纤维的比例的方法，其中在纤维壁中确定虚拟扩散系数，以便在至少两根纤维中通过它进行扩散 一级和二级纤维的比例已知的悬浮液和在测量中的纤维悬浮液中，并且通过假设扩散系数主要以线性方式依赖于初级和次级的比例来估计二次纤维在测量悬浮液中的比例 纤维在纤维悬浮液中。
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公开(公告)号：US4975578A
公开(公告)日：1990-12-04
申请号：US339211
申请日：1989-04-17
申请人： Hiroshi Tomimasu , Philip Luner
发明人： Hiroshi Tomimasu , Philip Luner
CPC分类号： G01N23/04
摘要： Distribution of mass density of paper or other materials is determined by irradiating a sample with a burst of electron beams from an electron gun. The intensity levels of electron beams emerging from said sample are detected by an areal detector located immediately behind the sample. These intensity levels are processed to derive distribution of mass density information for the sample. The electron beam detector may be a photographic film or a realtime electron beam detector assembly coupled to computer controlled digital data processing and displaying equipment.
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