G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/53 (2006.01) G01N 15/02 (2006.01)
Patent
CA 2072743
2072743 9110123 PCTABS00006 A laser (1) is applied on the side of a channel which is traversed by a medium. The light beam from the laser (1) passes across the channel. Particles (5) in the medium within the measuring volume are hit by light and deflect this, thus creating forwardly-directed light cones. These light cones are refracted outside the channel by a lens (6) and thereafter hit a detector plate (8). The light which hits the detector plate (8) occurs in the form of light rings which have arisen by light diffraction. On the detector plate (8) at least two detector rings are arranged, consisting of light-sensitive elements adapted to measure the light power in those light rings which fall onto the light-sensitive elements. In an electronic differentiating unit (9) a difference is created between the measured light power values from two of these detector rings. This results in a difference signal which can be related to the size distribution of particles occurring in the flowing medium.
Laendin Ake
Leonardsson Lars
Parasnis Amalendu
Abb Stal Ab
Laendin Ake
Leonardsson Lars
Parasnis Amalendu
Robic
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