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Abstract

An acceleration measuring apparatus capable of calibrating its output with a zero-point in the state of no acceleration applied as well as sensitivity. An acceleration sensor detects each component of an acceleration and creates an output based on each of the detected components in each direction of at least two mutually perpendicular axes of orthogonal coordinates for the acceleration sensor. The acceleration sensor is held at at least two different positions; each of the acceleration sensor axes at one position is at a angle, with the gravitational acceleration direction, that is different from the angle at the other position. A processing circuit develops calibration parameters based on output by each component in the at least two axis directions of the gravitational acceleration measured by the acceleration sensor positioned at each of the at least two different positions and calibrates the output of the acceleration measured by using the calibration parameters to provide a calibrated output.

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First Claim