Measuring method and system for measuring particle size and shape of powdery or grain like particles
AssigneeIntelligent Pharmaceutics Ltd Oy
InventorsNiklas Sandler, Osmo Antikainen, Jouko Yliruusi
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Abstract
The invention relates to a measuring method for measuring the properties of a powder or granular sample (1) from the surface information of the sample. According to the method the sample is leveled for the measurement, at least one image of the surface of the sample (1) is taken and the properties, such as the grain-size distribution, of the sample (1) are determined by processing the information material by calculation. According to the invention, the sample (1) is made to be supported on a transparent sample plate (2, 13, 14, 15) and an image is taken through this sample plate (2, 13, 14, 15).
Claims16
A measuring method for measuring the properties of a powder or granular sample from the surface information of the sample, in which method
- the sample is leveled for the measurement,
- at least two images of the surface of the sample are taken under different illuminations, the surface structure of the sample remaining at least essentially unchanged in the different measurements, and
- the properties of the sample, such as its grain-size distribution, are determined by using calculation to compare the information material of at least two images,
- wherein
- the sample is made to be supported on a transparent sample plate and
- an image is taken through this sample plate.
A measuring system for measuring the properties of a powder or granular sample from the surface information of the sample, which system includes
- imaging devices for taking at least two images of the surface of the sample, in such a way that the surface structure of the sample is at least essentially unchanged in the different measurements, and
- calculation means for comparing by calculation the information material of at least two images, in order to determine the properties of the sample, such as its grain-size distribution,
- wherein the system comprises
- a transparent sample plate, on the first surface of which the sample is arranged to be supported, in which case the imaging devices are arranged on the second side of the transparent sample plate to examine the sample from the imaging surface side of the sample plate.
A measuring method for measuring the properties of a powder or granular sample from the surface information of the sample, in which method the sample is leveled for the measurement, at least one image is taken of the surface of the sample the surface structure of the sample remaining at least essentially unchanged in the various measurements, and the properties of the sample such as grain-size distribution are determined at least by processing the information material by calculation, wherein a model is created, the sample is made to be supported on a transparent sample plate and an image is taken through this sample plate, and only a single image is taken of the sample surface and is converted into a grey-tone vector, and on the basis of the grey-tone vector and the model the particle size can be calculated and then the particle-size distribution is calculated.
Dependencies are inferred from the claim text.