Method and system for calibrating sensors
AssigneeGeneral Electric Company
InventorsMark Allen Woodmansee, Jeffrey Alan Ham, Lam Arthur Campbell, Elizabeth Anne Oakden, Robert Paul Stachow, David John Sevey
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Abstract
A method for calibrating a sensor includes providing a fixture that defines a first coordinate system, providing a chassis, and orienting a plurality of sensor elements to form a misaligned coordinate system, wherein the misaligned coordinate system axes are oriented at other than right angles with respect to each other. The method also includes coupling the sensor to be calibrated to the fixture and mathematically compensating the misaligned coordinate system to correspond with the first coordinate system.
Claims20
A method for calibrating an acceleration sensor, said method comprising:
- providing a fixture that defines a first coordinate system;
- providing a chassis;
- orienting a plurality of sensor elements to form a misaligned coordinate system, wherein the misaligned coordinate system axes are oriented at other than right angles with respect to each other;
- coupling the sensor to be calibrated to the fixture;
- and
- mathematically compensating the misaligned coordinate system to correspond with the first coordinate system by determining a decomposed force vector using the formula {right arrow over (F)}i=A ({I{right arrow over (S)}}{right arrow over (V)}i+{right arrow over (b)}) wherein {right arrow over (F)}i is the decomposed force vector, A is an alignment matrix, {right arrow over (S)} is a scale vector, {right arrow over (V)} is a voltage vector, {right arrow over (b)} is a bias vector and I is an identity matrix.
(canceled)
A calibration system comprising:
- a fixture for defining a first coordinate system;
- a chassis;
- an acceleration sensor coupled to said fixture;
- and
- a plurality of sensor elements oriented to form a misaligned coordinate system having misaligned coordinate axes oriented at other than right angles with respect to each other, wherein a sensor output is mathematically compensated such that said misaligned coordinate system corresponds with said first coordinate system by determining a decomposed force vector from an equation given by {right arrow over (F)}i =A ({I{right arrow over (S)}}{right arrow over (V)}i+{right arrow over (b)}), where {right arrow over (F)}i is the decomposed force vector, A is an alignment matrix, {right arrow over (S)} is a scale vector, {right arrow over (V)} is a voltage vector, {right arrow over (b)} is a bias vector, and I is an identity matrix.
(canceled)
A calibration system controller comprising:
- a processor for optimizing calibration parameters of an acceleration sensor to compensate for a misaligned coordinate system of said sensor, such that said misaligned coordinate system is aligned with a first coordinate system by determining a decomposed force vector {right arrow over (F)}i =A ({I{right arrow over (S)}}{right arrow over (V)}i +{right arrow over (b)}), wherein {right arrow over (F)}i is said decomposed force vector, A is an alignment matrix, {right arrow over (S)} is a scale vector, {right arrow over (V)} is a voltage vector, {right arrow over (b)} is a bias vector, and I is an identity matrix.
Dependencies are inferred from the claim text.