Method for determining the average particle size of particles which are suspended in a liquid and flowing medium, by means of dynamic light scattering, and a device therefore

US10768086B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Peter Hobel · Buckenhof, DE
• Michael Maskos · Bodenheim, DE

Key dates

• Filing date: Jul 3, 2017
• Grant date: Sep 8, 2020
• Expiry date: Sep 27, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/10052
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In determining the size of particles in a flowing sample, initially scattered light is detected on a detector, in the form of images, standardization of the measured images takes place and determination of an offset and of an angle of rotation at least of a partial region of two temporally successive images relative to each other is effected. Two images congruent are subdivided into many partial areas with respectively a specific number of pixels and averaging of the brightness values of each individual partial area is implemented. Subsequently, the average brightness value of a partial area of the first image is correlated with the average brightness value of the partial area made congruent with this partial area in the second image (cross-correlation between the images). For each pair of congruent partial areas of the images, a correlation value is thereby produced.