A bidirectional communication channel between a robotic lawnmower and a charging station for data communication between the robotic lawnmower and the charging station. The communication channel includes a first interface provided on the robotic lawnmower and a second interface provided on the charging station. The first and second interface are connected to each other through charging contacts and configured to communicate data in a Direct Current, DC-balanced way. Each interface is provided with an inductor in a charging power path between the charging station and the robotic lawnmower. Each inductor includes a high impedance for enabling a high data transmission rate for frequencies above 50 kHz.

A work evaluation system configured to effect evaluation of a grass mowing work performed by a work vehicle includes a state information acquisition section for acquiring vehicle state information indicative of a state of the work vehicle when performing the grass mowing work, a sound data acquisition section for acquiring sound data comprised of collection of sounds around the work vehicle, a foreign object amount calculation section for calculating an amount of foreign objects present in the work land which come into contact with a mowing blade in the course of the grass mowing work and an evaluation section for evaluating the grass mowing work performed in the work land, based on the vehicle state information and the foreign object amount.

A system for autonomous mower navigation includes a robotic golf greens mower, an RTK-GPS base for providing RTK-GPS correction data, a cloud based data processing service for processing geolocation data, one or more computer servers, one or more mobile devices, a data communications network for providing communications access between any of the RTK-GPS base, the mobile device, the cloud service, and the robotic greens mower. The RTK-GPS correction data is processed by the cloud service and provided to the robotics greens mower via the data communications network.

The disclosure discloses a method and device in UE and a base station for channel coding. A first node first determines a first bit block and then transmits a first radio signal, wherein bits of the first bit block are used to generate bits of a second bit block, a third bit block comprises bits of the second bit block and the first bit block, and the third bit block is used to generate the first radio signal. The first bit block, the second bit block and the third bit block comprise P1, P2 and P3 bits, respectively.

A robotic lawnmower system comprising a charging station (210) and a robotic work tool (100), the charging station comprising a signal generator (240) to which a boundary cable (250) is to be connected, the signal generator (240) being configured to transmit a signal (245) through the boundary cable (250), and the robotic working tool (100) comprising a sensor (170) configured to pick up magnetic fields generated by the signal (245) in the boundary cable (250) thereby receiving the signal (245) being transmitted and a controller (110) configured to analyse the picked up signal, wherein the signal generator (240) is further configured to: prefilter the signal through an filter model; and transmit the prefiltered signal to through the boundary cable (250) by means of a current generator.

A method navigates a robotic mower (2) by means of a wire (8). The robotic mower (2) comprises at least two sensors (12; 14). The method comprises detecting (S101), by means of the at least two sensors (12, 14), at least one signal from the wire (4a; 8; 10), measuring (S102) a polarity of the at least one signal of the wire (4a; 8; 10) by means of each one of the at least two sensors (12, 14), determining (S103) a direction based on the polarities measured by means of the at least two sensors (12, 14) and turning (S104) the robotic mower (2) towards the determined direction.

The present invention provides a robot gardening tool system and a method for a robot gardening tool. The robot gardening tool system comprises a robot gardening tool and a boundary module. The boundary module delimits a work area and/or a non-work area of the robot gardening tool, and the boundary module comprises at least one boundary element. The robot gardening tool comprises a boundary detection apparatus, a jamming detection apparatus and a control apparatus. The boundary detection apparatus detects the at least one boundary element; the jamming detection apparatus judges whether the robot gardening tool is jammed based on a feedback signal S.sub.i of the boundary detection apparatus; and the control apparatus controls the robot gardening tool to perform an extrication operation when the robot gardening tool is jammed. The present invention also provides a method for a robot gardening tool. The robot gardening tool system and method for a robot gardening tool according to the present invention enable effective detection of jamming, reduce misjudgements, and can perform effective operations on work areas where jamming is likely.

A mower cutting unit lift system includes a rotary motor connected to a power supply and turning an output shaft connected to a bell crank. A flexible link between the bell crank and a lift arm is used to lift a cutting unit to a transport position if the rotary motor turns the output shaft and the bell crank in a first direction, and lower the cutting unit to a mowing position if the rotary motor turns the output shaft and the bell crank in a second direction.

A robotic work tool system (200) comprising a robotic work tool (100), the robotic work tool (100) being configured to determine (410) that the robotic work tool (100) has entered a state of limited movement; determine (420) an exit path; and exit (430) the state of limited movement by navigating the exit path.

Provided is an accommodation device capable of transporting a work vehicle(s) smoothly. The accommodation device is configured to accommodate a plurality of work vehicles that carry out a work while traveling autonomously, including a plurality of accommodation cases mounted on a load carrying bed of a transporter vehicle being capable of accommodating the plurality of work vehicles individually, a supporting section for supporting the plurality of accommodation cases respectively with allowing movement thereof along a preset path, an actuator for driving the supporting section for causing the accommodation cases to move along the path, and an electric generator for supplying electric power to the actuator.