Patent ID: 8583392
Filing Date: 2013-11-12
Classification: G01C,G01P

Abstract:
1. A method for calibrating a fixture used to calibrate inertial measurement units (IMUs) of several electronic devices, comprising: placing a fixture in a gimbal operative to rotate between a plurality orientations; coupling a previously calibrated testing IMU to the fixture, wherein the testing IMU is aligned with a reference frame of the fixture; placing a previously calibrated mobile IMU incorporated in a housing in a particular slot of a plurality of slots in the fixture, wherein the mobile IMU is aligned with a reference frame of the housing; moving the gimbal in a sequence of testing orientations; capturing an output from the testing IMU and from the mobile IMU during the moving; and calculating a correction factor associated with the particular slot based on the captured output from the testing IMU and from the mobile IMU, wherein the correction factor is applied to convert the output of the mobile IMU to an output corresponding to the reference frame of the fixture.