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42. 发明授权

US5042947A Scrap detector 失效
标题翻译：废料检测器
公开(公告)号：US5042947A
公开(公告)日：1991-08-27
申请号：US588496
申请日：1990-09-24
申请人： Manfred Potzschke , Hans-Peter Sattler , Kristian Hohla , Thomas R. Loree
发明人： Manfred Potzschke , Hans-Peter Sattler , Kristian Hohla , Thomas R. Loree
IPC分类号： G01N21/63 , G01J3/28 , G01N21/71 , G01N21/85 , G01N33/20
CPC分类号： G01N21/718 , G01J3/28 , G01N21/85
摘要： Disclosed is a process and apparatus to analyze metal particles to determine their composition and to generate a sorting signal. The particles are exposed to a pulsed laser beam by which they are partly vaporized to form a plasma so that the particles are cleaned and the cleaned area is subsequently partially vaporized by a pulsed laser beam to form a plasma. The spectral lines of the plasma are inspected for an identification of the composition of the metal particles. The required inspection rate of 30 particles per second can readily be achieved or even exceeded if a defined narrow wavelength range or a defined wavelength is filtered from the total radiation that is emitted by the plasma and the intensities of the filtered partial radiations are related to each other to obtain ratios, which are compared with adjustable limiting values. A sorting signal is derived from the result of said comparison. The inspection rate can be improved in that the partial radiation is subjected to a comparison only for a defined interval of time.
摘要翻译：公开了分析金属颗粒以确定其组成并产生分选信号的方法和装置。颗粒暴露于脉冲激光束，通过它们被部分蒸发以形成等离子体，使得颗粒被清洁，并且清洁区域随后被脉冲激光束部分地蒸发以形成等离子体。检查等离子体的光谱线以识别金属颗粒的组成。如果从等离子体发射的总辐射中过滤限定的窄波长范围或限定的波长，并且滤波的部分辐射的强度与每个等离子体发射的强度相关，则可以容易地实现或甚至超过每秒30个所需的检测速率其他获得比值，与可调极限值进行比较。从所述比较的结果得出排序信号。可以提高检查率，因为部分放射仅在规定的时间间隔内进行比较。

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