NAVIGATION SYSTEMS FOR WHEELED CARTS

Number of patents in Portfolio can not be more than 2000

United States of America

APP PUB NO 20200017135A1
SERIAL NO

16275066

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Examples of systems and methods for locating movable objects such as carts (e.g., shopping carts) are disclosed. Such systems and methods can use dead reckoning techniques to estimate the current position of the movable object. Various techniques for improving accuracy of position estimates are disclosed, including compensation for various error sources involving the use of magnetometer and accelerometer, and using vibration analysis to derive wheel rotation rates. Various techniques utilize characteristics of the operating environment in conjunction with or in lieu of dead reckoning techniques, including characteristic of environment such as ground texture, availability of signals from radio frequency (RF) transmitters including precision fix sources. Navigation techniques can include navigation history and backtracking, motion direction detection for dual swivel casters, use of gyroscopes, determining cart weight, multi-level navigation, multi-level magnetic measurements, use of lighting signatures, use of multiple navigation systems, or hard/soft iron compensation for different cart configurations.

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International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Carter, Scott J Seal Beach, US 57 2776
Hannah, Stephen E Placentia, US 53 1903
Harling, Robert M Irvine, US 6 23
James, Jesse M Santa Ana, US 41 1180
Johnson, Jack Irvine, US 27 241
Ramanathan, Narayanan V Lake Forest, US 4 10

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