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1. (WO2007010320) METHOD AND DEVICE FOR LIQUID CONDUCTIVITY MEASUREMENT
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/010320 International Application No.: PCT/IB2005/002156
Publication Date: 25.01.2007 International Filing Date: 21.07.2005
IPC:
G01R 27/22 (2006.01) ,G01N 27/04 (2006.01) ,G01N 27/06 (2006.01)
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
27
Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
02
Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
22
Measuring resistance of fluids
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27
Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
02
by investigating impedance
04
by investigating resistance
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27
Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
02
by investigating impedance
04
by investigating resistance
06
of a liquid
Applicants:
CNR CONSIGLIO NAZIONALE DELLE RICERCHE [IT/IT]; Piazzale Aldo Moro, 7 I-00185 Roma, IT (AllExceptUS)
SCOZZARI, Andrea [IT/IT]; IT (UsOnly)
Inventors:
SCOZZARI, Andrea; IT
Agent:
CELESTINO, Marco; ABM Agenzia Brevetti & Marchi Viale Giovanni Pisano, 31 I-56123 Pisa, IT
Priority Data:
Title (EN) METHOD AND DEVICE FOR LIQUID CONDUCTIVITY MEASUREMENT
(FR) PROCÉDÉ ET DISPOSITIF DESTINÉS À LA MESURE DE LA CONDUCTIVITÉ D’UN LIQUIDE
Abstract:
(EN) A method for measuring the electric conductivity of a fluid in which a couple of electrodes is immersed through which is electric current passes according to a periodic time function substantially similar to a rectangular wave with null mean characterized by sloping up and/or down fronts (30, 32) having substantially infinite slope. At the ends of said electrodes the voltage is determined at sampling instants (34,35 and 36,37) immediately close to said sloping up and/or down fronts, and in particular, directly upstream and downstream of said sloping up and down fronts. The succession of sampling instants (34,35 and 36,37) is a succession of ranges of finite duration, programmable on a semiconductor memory.
(FR) La présente invention concerne un procédé permettant de mesurer la conductivité électrique d’un fluide dans lequel une paire d’électrodes est immergée et par laquelle passe un courant électrique en tenant compte d’une fonction de temps périodique sensiblement similaire à une onde rectangulaire de valeur moyenne nulle caractérisée par une inclinaison vers le haut et/ou des fronts inférieurs (30, 32) présentant une pente sensiblement infinie. Aux extrémités desdites électrodes, la tension est déterminée à des instants d’échantillonnage (34, 35 et 36, 37) immédiatement à proximité de ladite inclinaison vers le haut et/ou des fronts inférieurs, et en particulier, directement en amont et en aval de la dite inclinaison vers le haut et des fronts inférieurs. La succession d’instants d’échantillonnage (34, 35 et 36, 37) est une succession de plages d’une durée finie, programmables sur une mémoire à semi-conducteurs.
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)