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US 7,089,784 B2Granted
Device for evaluating the signal from a viscosity sensor
AssigneeRobert Bosch GmbH
InventorsBernhard Jakoby, Johannes Artzner
Life of this patent
Estimating the term…
Abstract
A device is provided for evaluating the signal from a viscosity sensor having an amplifying circuit. The amplification of the amplifying circuit is controlled by a temperature signal from a temperature sensor.
Claims2
A device for evaluating a signal from a viscosity sensor sensing a medium, comprising:
- an amplifying circuit for the signal from the viscosity sensor, wherein the amplifying circuit includes a predetermined temperature dependence for an amplification of the signal from the viscosity sensor as a function of the temperature of the medium, and wherein the signal from the viscosity sensor is dependent on a temperature T and constants (k1 and k2), and wherein the constants k1 and k2 depend on a grade of the medium, according to the following formula:
- VS ≈k1+k2T
- wherein VS is the signal from the viscosity sensor.
A device for evaluating a signal from a viscosity sensor sensing a medium, comprising:
- an amplifying circuit for the signal from the viscosity sensor, wherein the amplifying circuit includes a predetermined temperature dependence for an amplification of the signal from the viscosity sensor as a function of the temperature of the medium, and wherein the amplification of the amplifying circuit is dependent on a temperature T and constants (cl and c2), and wherein the constants c1 and c2 depend on a grade of the medium, according to the following formula:
- A≈1/(c1+c2T
- wherein A is the amplification of the amplifying circuit.
Dependencies are inferred from the claim text.