Patent ID: 8688375
Filing Date: 2014-04-01
Classification: G01C,G01S,G08B,G08G

Abstract:
1. A system for tracking a mobile person or asset, comprising: a portable system associated with a person or asset being tracked, the portable system comprising at least an inertial navigation unit including at least one accelerometer, at least one gyroscope, at least one magnetic field sensor, and a processor that is configured to generate information for the person or asset based on sensor data received from one or more of the at least one accelerometer, the at least one gyroscope, or the at least one magnetic field sensor, wherein the information includes at least three-dimensional location coordinates, and data about one or more of posture of the person or asset, movements of the person or asset, or features associated with the environment in which the person or asset is being tracked; and a computer configured to receive, from the portable system, the information generated by the processor and to calculate a path from the information that tracks the person or asset, wherein the computer is further configured to develop one or more location-related sensor profiles from the information and to infer one or more building features from the information, and wherein the computer is further configured to execute one or more processing algorithms to make corrections to the three-dimensional location coordinates based on the one or more location-related sensor profiles and the one or more building features and to recalculate the path thereby reducing tracking errors in the path.