Method and apparatus of detecting impurities in fluid

Details Method and apparatus of detecting impurities in fluid Method and apparatus of detecting impurities in fluid

G - Physics

01

N

G01N 21/53 (2006.01) B29C 47/92 (2006.01) G01N 15/06 (2006.01) G01N 21/85 (2006.01) G01N 21/88 (2006.01)

Patent

CA 2113875

There is provided a method and apparatus of detecting minute impurities in the entire body of a fluid. Part of the passage through which the fluid flows is constituted by a transparent member. Light is emitted in a direction substantially parallel to the longitudinal axis of this part of the fluid passage so as to envelop the same. Light scattered by impurities in the fluid is observed from a direction substantially perpendicular to the direction of the passage to detect any minute impurities in the fluid. The method and apparatus is well-suited for use in systems which extrude molten resin in the formation of plastic products used in an electrical environment in order to detect impurities in the resin which could adversely affect the performance of the products.

Cette invention concerne une méthode et un appareil de détection des minuscules impuretés contenues dans un fluide. Une partie du passage dans lequel circule le fluide est transparente et soumise à un flux lumineux enveloppant sensiblement parallèle à son axe longitudinal. La lumière diffusée par les impuretés du fluide est captée d'une direction sensiblement perpendiculaire à l'axe longitudinal précité et sert à signaler la présence d'impuretés. La méthode et l'appareil conviennent à un système d'extrusion de résine fondue pour la fabrication d'articles en plastique destinés à servir dans une environnement électrifié où les impuretés subsistant dams la résine risquent d'avoir un effet négatif sur la performance desdits articles.

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