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1. 发明授权

US5438408A Measuring device and method for the determination of particle size distributions by scattered light measurements 失效
标题翻译：用于通过散射光测量确定粒度分布的测量装置和方法
公开(公告)号：US5438408A
公开(公告)日：1995-08-01
申请号：US983559
申请日：1993-02-05
申请人： Reiner Weichert , Wolfgang Witt
发明人： Reiner Weichert , Wolfgang Witt
IPC分类号： G01N15/02 , G06T1/00
CPC分类号： G01N15/0211 , G01N15/0227
摘要： For the determination of fine particle size distributions by scattered light measurements, an assembly of suspended particles is illuminated with coherent light, the scattered light pattern is focused on a light sensitive multi-element detector of a registration device and is transformed there to electrical signals. From the digitized electrical signals, the particle size distribution is computed with a computer. For the simplification of the setup and for the improvement of the accuracy of the computable particle size distribution, it is provided that the registration device is a video camera and that the particle size distribution is computed via the solution of a Fredholm integral equation from the signals produced by the light intensities at the pixels of the video camera. The video camera is a CCD camera. For the variation of the brightness, a rotating disc with gray filters of different transmittivities is provided in the measuring light beam, or the camera is equipped with an electronic shutter for different exposure times. Different fractions of particle sizes is measured also by variation of the angle between the optical axes of illumination and imaging devices.
摘要翻译： PCT No.PCT / EP92 / 01276 Sec。 371日期：1993年2月5日 102（e）日期1993年2月5日PCT提交1992年6月5日PCT公布。第WO92 / 21955号公报日期为1992年12月10日。为了通过散射光测量确定细粒度分布，用相干光照射悬浮颗粒的组件，散射光图案聚焦在配准装置的光敏多元件检测器上，在那里被转换成电信号。从数字化电信号中，使用计算机计算粒度分布。为了简化设置和提高可计算粒度分布的精度，提供了注册设备是摄像机，并且通过来自信号的Fredholm积分方程的解来计算粒度分布由摄像机的像素处的光强度产生。摄像机是CCD摄像机。对于亮度的变化，在测量光束中提供具有不同透射率的灰度滤光片的旋转盘，或者相机配备有用于不同曝光时间的电子快门。通过照明和成像装置的光轴之间的角度的变化来测量不同的颗粒尺寸。

2. 发明授权

US06520837B2 Method and apparatus for ultrafine grinding and/or mixing of solid particles 失效
标题翻译：用于超细研磨和/或混合固体颗粒的方法和装置
公开(公告)号：US06520837B2
公开(公告)日：2003-02-18
申请号：US09761884
申请日：2001-01-17
申请人： Reiner Weichert
发明人： Reiner Weichert
IPC分类号： B24B100
CPC分类号： B02C19/186 , B02C17/14 , B02C23/06 , Y10S977/773 , Y10S977/775 , Y10S977/888 , Y10S977/90
摘要： In a method for ultrafine grinding of solid particulate material to mean particle sizes far below 1 micrometer and/or for mixing of powder and agglomerate material with mean particle sizes in the range of nanometers, the material to be ground and/or mixed and an grinding/mixing additive are filled into a cooled grinding chamber containing loose grinding media. By motion of the grinding media relative to adjacent media and to the walls of the grinding chamber the material is ground to the desired particle size and/or is finely mixed. Subsequently the additive is removed from said material. For the production of particle sizes in the range of nanometers and/or for mixing particles of this size range, the method comprises that grinding and/or mixing is carried out in a cooled atmosphere in the presence of a fine grained solidified additive which is chemically inert to said material, preferably water ice or solid carbon dioxide, at temperatures below their melting or sublimation temperature. Subsequently said additive is removed from said material by evaporation. The additive can be evaporated or is volatile at temperatures below 50° C. at ambient pressure. An apparatus for carrying out such method is disclosed.
摘要翻译：在将固体颗粒材料超细粉碎至平均粒度远低于1微米的方法和/或用于混合平均粒径在纳米范围内的粉末和附聚物材料的方法中，待研磨和/或混合的材料和研磨 /混合添加剂填充到含有松散研磨介质的冷却研磨室中。通过研磨介质相对于相邻介质和研磨室的壁的运动，将材料研磨成所需的粒度和/或精细混合。随后从所述材料中除去添加剂。为了生产在纳米范围内和/或用于混合这种尺寸范围的颗粒的颗粒尺寸，该方法包括在冷却的气氛中，在细化的固化添加剂存在下进行研磨和/或混合在低于其熔融或升华温度的温度下对所述材料是惰性的，优选为水冰或固体二氧化碳。随后通过蒸发从所述材料中除去所述添加剂。添加剂可以在环境压力下在低于50℃的温度下蒸发或挥发。公开了一种用于执行这种方法的装置。

3. 发明授权

US5309216A Method of and an apparatus for determining particle size distributions by measuring the spectral light extinction during sedimentation 失效
标题翻译：通过测量沉降过程中的光谱光消光来确定粒度分布的方法和装置
公开(公告)号：US5309216A
公开(公告)日：1994-05-03
申请号：US894014
申请日：1992-06-05
申请人： Reiner Weichert
发明人： Reiner Weichert
IPC分类号： G01N15/02 , G01N15/04 , G01N21/53
CPC分类号： G01N15/02 , G01N2015/045 , G01N21/534
摘要： A method of determining particle size distributions in the range of from about 0.03 to 10 .mu.m by measuring the spectral light extinction during sedimentation of particles suspended in a transparent liquid in a centrifugal field. The light transmissions through the suspension of light of different wavelengths are measured in response to the settling time and the particle size distribution is determined from the light transmissions measured. No knowledge of the optical data of the particles is needed. The integral equation to be solved for that purpose is given. A wide particle size range can be covered precisely within short times of analysis.
摘要翻译：通过测量在悬浮在离心场中的透明液体中的颗粒的沉降期间的光谱光消光来确定在约0.03至10μm的范围内的粒度分布的方法。通过响应于沉降时间测量通过不同波长的光的悬浮的光透射，并且从测量的光透射确定粒度分布。不需要对粒子的光学数据的了解。给出了要解决的积分方程。在较短的分析时间内可以精确覆盖宽的粒度范围。

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