Deere & Company

Colin Eric Das

David August Johnson

Patrick Wilson Cross

Brent R Trenhaile

A boundary signal detection system distinguishes a valid boundary signal for a target region from an extraneous boundary signal for a neighboring region. The system includes electronics that convert the candidate signal from a time domain to a frequency domain to identify at least one embedded frequency in the candidate, that compare the at least one embedded frequency in the candidate signal to at least one predetermined embedded frequency of the valid boundary signal, and that identify the candidate signal as the valid boundary signal based upon the comparison.

Boundary signal detection

A robotic mower navigation system has a plurality of landmark tags sequentially spaced along or inside a boundary wire. Each landmark tag has a unique identifier. The robotic mower has a detector for detecting the landmark tags, and a vehicle control unit having memory storing data for each of the landmark tags including the unique identifiers, a departure angle and a distance from the landmark tag to another non-sequential landmark tag. The vehicle control unit determines the shortest route to a specified destination based on the stored landmark tag data.

Robotic mower navigation system

A robotic mower sensor assembly for detecting a boundary wire signal. The sensor assembly includes a plurality of analog inductive sensors with a first inductive sensor oriented along a first axis and a second inductive sensor oriented along a second, different axis. Each inductive sensor is configured to generate a signal indicative of the distance of the robotic mower from the boundary wire. A control unit communicating with the sensor assembly is configured to operate the robotic mower in response to the signals from the sensor assembly which are indicative of the distance of the robotic mower from the boundary wire.

Boundary sensor assembly for a robotic lawn mower, robotic lawn mower and robotic lawn mower system

A navigation system for a robotic mower includes a boundary wire defining a boundary of a specified area; a boundary sensor assembly, and a vehicle control unit with a navigation arbitration logic configured to arbitrate a selection between at least a straight propagation mode and an arc propagation mode. The navigation arbitration module is configured to select the arc propagation mode when the sensor assembly indicates that the mower approaches the boundary of the specified area and has a distance from the boundary that is equal to or smaller than a specified turn distance. The boundary sensor assembly generates a sensor signal representative of a measured yaw angle of the mower relative to the boundary wire, and the navigation arbitration logic is configured to generate output information representative of a desired yaw angle dependent on an assumed actual yaw angle.

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Mt. Prospect, IL, United States of America

Colin Eric Das