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1. WO2004010091 - VARIABLE RESISTANCE SENSOR WITH COMMON REFERENCE LEG

Publication Number WO/2004/010091
Publication Date 29.01.2004
International Application No. PCT/US2003/022337
International Filing Date 16.07.2003
Chapter 2 Demand Filed 26.01.2004
IPC
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 1/696 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 1/698 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
698Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
G01F 1/86 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
76Devices for measuring mass flow of a fluid or a fluent solid material
86Indirect mass flowmeters, e.g. measuring volume flow and density, temperature, or pressure
CPC
G01F 1/6847
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
6847where sensing or heating elements are not disturbing the fluid flow, e.g. elements mounted outside the flow duct
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 1/698
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
698Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
G01F 1/86
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
76Devices for measuring mass flow of a fluid or a fluent solid material
86Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
Applicants
  • CELERITY GROUP INC. [US]/[US]
Inventors
  • LULL, John, Michael
Agents
  • SKRIVANEK, Robert, A., Jr.
Priority Data
60/397,13919.07.2002US
60/436,20723.12.2002US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) VARIABLE RESISTANCE SENSOR WITH COMMON REFERENCE LEG
(FR) CAPTEUR A RESISTANCE VARIABLE AVEC TIGE DE REFERENCE COMMUNE
Abstract
(EN)
A resistive bridge sensor circuit that includes a first resistive bridge circuit having a first variable resistance resistor and a second resistive bridge circuit having a second variable resistance resistor. The first and second resistive bridge circuits share at least a portion of a common reference leg that sets a resistance of a first and second variable resistors. The common reference leg or a portion of the common reference leg is alternately switchably connected to one of the first and second resistive bridge circuits.
(FR)
La présente invention concerne un montage en pont résistant de capteur qui comprend un premier montage en pont résistant possédant un premier pont de résistance variable et un second montage en pont résistant possédant un second pont de résistance variable. Le premier et le second montage en pont résistant partagent au moins une partie d'une tige de référence commune qui règle une résistance d'un premier et d'un second pont de résistance variable. Cette tige de référence commune ou une partie de cette tige de référence commune est alternativement connectée par commutation au premier ou au second montage en pont résistant.
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