US 9,752,879 B2 · System and method for estimating heading misalignment

Abstract

This disclosure relates to heading misalignment estimation with a portable device and more specifically to estimating misalignment between a portable device having a sensor assembly and a platform transporting the portable device when the platform is undergoing motion having periodic characteristics. In one aspect, a suitable method includes obtaining inertial sensor data for the portable device and determining an effective frequency characteristic of the inertial sensor data representing the motion having periodic characteristics. The inertial sensor data may be processed using the determined frequency characteristic so that a heading misalignment may be estimated between the heading of the portable device and the platform.

Claims37

Dependent claims

A portable device, the device being within a platform, the device comprising a sensor assembly integrated with the portable device that outputs inertial sensor data and a heading misalignment estimator configured to:

determine an effective frequency characteristic of the inertial sensor data, wherein the effective frequency characteristic of the inertial sensor data represents periodic characteristics of motion of the platform;
process the inertial sensor data based at least in part on the determined frequency characteristic, wherein processing the inertial sensor data comprises reducing signal artifacts;
and
estimate a heading misalignment between a heading of the portable device and the platform using the processed inertial sensor data, wherein estimating the heading misalignment is based at least in part on a maximum variance of the processed inertial sensor data.

1 more element

Dependencies are inferred from the claim text.

System and method for estimating heading misalignment

Life of this patent

System and method for estimating heading misalignment

Life of this patent

Abstract

Claims37