Patent ID: 7367232
Filing Date: 2008-05-06
Classification: G01P

Abstract:
1. A method of determining three components of an applied inertial force with respect to an orthogonal coordinate system, said method comprises the steps of: providing a semiconductor sensor chip having side selectively positioning only three stress-sensitive IC components integrated into three local areas of the elastic element; orienting the orthogonal coordinate system such that X and Y axes are located in the plane of side applying a known inertial force to the sensor chip along X, Y and Z axes; determining the matrix of offsets and matrix of sensitivities of the stress-sensitive IC components to the orthogonal components of the known applied force; determining three orthogonal components of the unknown applied inertial force by solving with digital processing a system of three equations containing the three orthogonal components of the unknown applied force, matrixes of offsets and sensitivities of the stress-sensitive IC components to orthogonal components of the known inertial force vector.