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1. (WO1998053302) APPARATUS FOR MEASURING THE EVOLUTION OF OPTICAL CHARACTERISTICS IN A CIRCULATING LIQUID OR GAS MEDIUM
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/053302 International Application No.: PCT/FR1998/000992
Publication Date: 26.11.1998 International Filing Date: 19.05.1998
Chapter 2 Demand Filed: 17.12.1998
IPC:
G01N 21/53 (2006.01)
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
17
Systems in which incident light is modified in accordance with the properties of the material investigated
47
Scattering, i.e. diffuse reflection
49
within a body or fluid
53
within a flowing fluid, e.g. smoke
Applicants:
LASERTEC INTERNATIONAL [FR/FR]; Parc d'activité de Lazzaro Rue de l'Avenir F-14460 Colombelles, FR (AllExceptUS)
CHERBIT, Guy, Alain [FR/FR]; FR (UsOnly)
Inventors:
CHERBIT, Guy, Alain; FR
Agent:
CABINET HERRBURGER; 115, boulevard Haussmann F-75008 Paris, FR
Priority Data:
97/0631523.05.1997FR
Title (EN) APPARATUS FOR MEASURING THE EVOLUTION OF OPTICAL CHARACTERISTICS IN A CIRCULATING LIQUID OR GAS MEDIUM
(FR) APPAREIL DE MESURE DE L'EVOLUTION DES CARACTERISTIQUES OPTIQUES D'UN MILIEU LIQUIDE OU GAZEUX EN CIRCULATION
Abstract:
(EN) The invention concerns an apparatus for measuring the evolution of optical characteristics in a circulating liquid or gas medium, by directly measuring the light diffused through the medium, said apparatus comprising: a sensor (100) with a passage (111) traversed by the medium to be measured; a monochromatic light source stabilised on a wavelength (112) directed through (XX) the passage (111); a photodetector (121) aligned on the source (112) on the other side of the passage (111); a flow meter (140); an operating circuit (200) consisting of a circuit powering (115) the laser (112) and formatting (210) the photodetector (100) signals, and a processing circuit (220) to evaluate the sensor (100) and flow meter signals and supply representative data. The apparatus simultaneously measures the cloudiness, the flow rate, the temperature and counts the particles suspended in the fluid.
(FR) Appareil de mesure de l'évolution des caractéristiques optiques d'un milieu liquide ou gazeux en circulation, par la mesure de la lumière diffusée en direct à travers le milieu. Appareil comprenant: un capteur (100) ayant un passage (111) traversé par le milieu à mesurer, une source de lumière monochromatique et stabilisée sur une longueur d'onde (112) dirigée à travers (XX) le passage (111), un photodétecteur (121) aligné sur la source (112) de l'autre côté du passage (111), un débitmètre (140), un circuit d'exploitation (200) formé d'un circuit d'alimentation (115) du laser (112) et de mise en forme (210) des signaux du photodétecteur (100), et d'un circuit de traitement (220) pour évaluer les signaux du capteur (100) et du débitmètre et fournir des données représentatives. L'appareil mesure simultanément la turbidité, le débit, la température et effectue le comptage des particules en suspension dans le fluide.
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Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
EP0983502JP2001526785 CA2290674AU1998077743