Mtd Products Inc

Christopher J Churavy

Shai Abramson

Edward John Blanchard

Ayala Raanan

Ryan Cmich

Joseph Edward Saunders

Adam Ference

Ido Ikar

A system and method for proximity determination can include receiving an RF signal transmitted from a target location, the receiving performed by an antenna of an autonomous moving device, extracting received signal strength indicator (RSSI) values by processing the received RF signal, receiving distance measurements provided by a sensor associated with the autonomous moving device and storing the distance measurements in the memory of the autonomous device. The extracted RSSI values can be correlated the with the distance measurements to obtain a proximity value. A distance to the target location can be determined based on the proximity values.

Navigation systems and methods for an autonomous device

An obstruction sensing system for an autonomous device can include a chassis including a drive system for movement relative to a working surface, a shell resiliently mounted to the chassis and movable relative to the chassis in response to a force applied to the shell, a sensor assembly comprising a single sensor disposed on the chassis and a magnet disposed on and movable with the shell in response to the force applied to the shell, wherein the sensor is configured to output a three-axis magnetic flux vector in response to a movement of the magnet. A sensing method for an autonomous device can include detecting a polarity change in the sensor and in response determining that an obstruction has been detected, evaluating, by a processing component, a three-axis magnetic flux vector, and calculating at least one of a direction and a magnitude of a deflection based on the evaluation.

Sensor system and sensing method for an autonomous device

A zone mobility system and method for an autonomous device includes a work area within which the autonomous device is intended to operate, one or more electrically separated boundary conductors, each boundary conductor surrounding a work zone within the work area, a transmitter base electrically connected to at least one of the boundary conductors, and a removably coupled transmitter configured to transmit a signal for directing movement of the autonomous device on the boundary conductor wire. The transmitted signal can be adjusted to optimize the power consumption of the transmitter, and a work operation can be commenced utilizing a transmitter interface, and/or utilizing an autonomous device user interface.

Zone mobility system and method for an autonomous device

A method for autonomous mower navigation includes receiving a return-to-zero encoded signal including a pseudo-random sequence, transforming the received signal to a non-return-to-zero representation, digitally sampling the non-return-to-zero signal representation in a time domain, filtering the sampled signal utilizing a reference data array based on the return-to-zero encoded signal to produce a filter output, and determining a location of the autonomous mower relative to a defined work area based on an evaluation of the filter output.

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Lakewood, OH, United States of America

Christopher J Churavy