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1. WO2020178403 - SYSTEM AND METHOD FOR DETECTING A FLOW OF A FLUID OR PASTY PRODUCT USING A THERMISTOR AND ASSOCIATED GREASE LUBRICATION CIRCUIT

Publication Number WO/2020/178403
Publication Date 10.09.2020
International Application No. PCT/EP2020/055930
International Filing Date 05.03.2020
IPC
G01F 1/696 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
68by using thermal effects
696Circuits therefor, e.g. constant-current flow meters
G01F 1/684 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
68by using thermal effects
684Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
G01F 1/688 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
68by using thermal effects
684Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
688using a particular type of heating, cooling or sensing element
G01F 15/18 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
15Details of, or accessories for, apparatus of groups G01F1/-G01F13/104
18Supports or connecting means for meters
CPC
G01F 1/684
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
68by using thermal effects
684Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
G01F 1/6888
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
68by using thermal effects
684Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
688using a particular type of heating, cooling or sensing element
6888Thermoelectric elements, e.g. thermocouples, thermopiles
G01F 1/696
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
68by using thermal effects
696Circuits therefor, e.g. constant-current flow meters
G01F 15/18
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
15Details of, or accessories for, apparatus of the preceding groups insofar as such details or appliances are not adapted to particular types of such apparatus
18Supports or connecting means for meters
Applicants
  • NTN-SNR ROULEMENTS [FR]/[FR]
Inventors
  • PILLIAS, Benoît
  • POLLIER, Vivien
Agents
  • ALATIS
Priority Data
FR190225105.03.2019FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) SYSTEM AND METHOD FOR DETECTING A FLOW OF A FLUID OR PASTY PRODUCT USING A THERMISTOR AND ASSOCIATED GREASE LUBRICATION CIRCUIT
(FR) SYSTÈME ET MÉTHODE DE DÉTECTION D'UN FLUX DE PRODUIT FLUIDE OU PÂTEUX PAR THERMISTANCE ET CIRCUIT DE LUBRIFICATION EN GRAISSE ASSOCIÉ
Abstract
(EN)
A system (24) for detecting a flow of a fluid or pasty product comprising a measuring thermistor (32) having a negative temperature coefficient, the measuring thermistor (32) being able to be placed in an ambient measuring environment having a given ambient temperature and being able to exhibit, relative to the ambient measuring environment, thermal resistance that varies as a function of the presence or of the absence of a flow of a fluid or pasty product in the ambient measuring environment, and a circuit (36) for detecting temporal variations of a potential measuring difference between a terminal of the measuring thermistor (32) and a reference potential. It further comprises a current-regulated circuit (52) for powering the measuring thermistor (32), which circuit is controlled by a compensation thermistor (36) having a negative temperature coefficient, the compensation thermistor (36) being able to be placed in an ambient reference environment (35) at the given ambient temperature, so as to deliver a power supply current to the measuring thermistor (32), the intensity of which current is inversely proportional to the resistance of the compensation thermistor (36).
(FR)
Un système de détection (24) d'un flux de produit fluide ou pâteux, comporte une thermistance de mesure (32) ayant un coefficient de température négatif, la thermistance de mesure (32) étant apte à être positionnée dans un milieu ambiant de mesure ayant une température ambiante donnée et à présenter, par rapport au milieu ambiant de mesure, une résistance thermique qui varie en fonction de la présence ou de l'absence d'un flux de produit fluide ou pâteux dans le milieu ambiant de mesure, et un circuit de détection (36) de variations temporelles d'une différence de potentiel de mesure entre une borne de la thermistance de mesure (32) et un potentiel de référence. Il comporte en outre un circuit d'alimentation (52) de la thermistance de mesure (32) régulé en courant, piloté par une thermistance de compensation (36) ayant un coefficient de température négatif, la thermistance de compensation (36) étant apte être positionnée dans un milieu ambiant de référence (35) à la température ambiante donnée, de manière à délivrer à un courant d'alimentation de la thermistance de mesure (32), ayant une intensité qui est inversement proportionnelle à la résistance de la thermistance de compensation (36).
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