The present invention relates to a robotic lawn mower. The lawn mower comprises a housing having an upper cover portion and a chassis as a carrying platform; a mowing assembly mounted on the front section of the chassis and having two sets of rotatable cutting tools, and a moving assembly having four moving wheels that are mounted on the sides of the chassis; and a control unit for controlling the operation of the mowing assembly and moving assembly; as well as a power source providing power to the mowing assembly for the rotation of the cutting tools and the moving assembly for driving the lawn mower in any or all directions without necessity of turning the front or head of the mower. The cutting tools are formed of semi rigid and semi flexible material, and in the form of short rod or twisted cables or wires.

A mower is provided and includes: a housing; a movable upper cover, disposed on the housing; and a cutting assembly, disposed on the housing. The cutting assembly includes a blade carrier assembly, and the blade carrier assembly includes a blade carrier and a blade. The blade carrier includes a disc body and a blade receiving groove recessed inwardly from an edge of the disc body along an axial direction of the disc body. The blade is mounted in the blade receiving groove and arranged to be that the blade is not protruded out of the blade receiving groove in the axial direction of the disc body.

A system for determining a location of a device includes at least two speakers and the device, where each speaker is configured to produce a unique sound. The device includes microphones for receiving sound and for providing signals corresponding thereto, a memory configured to store for each speaker a fingerprint of each unique sound and speaker location information, and a processor connected to the outputs. The processor is configured to determine, by comparing microphone signals to fingerprints, a difference in arrival time of a sound at two microphones, and determine, based on the differences in arrival time, an orientation of the device with respect to the speakers, and to determine the location of the device in the space.

The present invention discloses a method comprising: A. acquiring the current I0 and I, and setting It1, It2, IR, Vmin, and Vmax. B. acquiring the speed V, and setting the speed VL and VH; C. a mowing motor runs in a low-speed mode, and a self-propelled motor runs at the speed VH; D. when encountering grassy areas, if I0<I<It1, keeping unchanged; if I≥It1 and lasting for T1, skipping to E; if I=IR, skipping to G; E. the mowing motor switches to the high-speed mode; F. the mowing motor switches to the low-speed mode, V is switched to VH; G the mowing motor switches to the high-speed mode, V is adjusted to VL; H. the mowing motor stops, the self-propelled motors stop, then retreat and work along the original path, after attempting for M times, if the self-propelled motors stop again, bypassing and skipping to C to continue working.

Disclosed are a lawn mower robot and a control method for same. A lawn mower robot and a control method for same according to an embodiment of the present invention can sense height information about the height between a lawn and the lower side of the lawn mower robot. The sensed height information is used as supporting data for calculating whether the lawn mower robot has deviated from a preset travel path, as well as the deviation direction. Accordingly, even when a separate sensing means is not provided, whether the lawn mower robot has deviated from the preset travel path is calculated using the height information about the height from the ground, and thus the lawn mower can be returned to the preset travel path.

The present invention relates to a hybrid power system for a robot or a robotic lawn mower. It comprises at least one generator for generating an electric current; at least one control board being provided to receive the electric current from the generator; and at least one rechargeable battery being connected to and charged by the electric current from the control board, and being charged by the electric current from the generator as well. The generator can he an AC generator or a DC generator, and there may be two generators, and two operation control boards. There are two types of end units, such as a cutting assembly and a moving assembly. At least one of the control boards provides a driving power for driving one of the end units of the robot or the robotic lawn mower, which may be operative under AC or DC. The cutting assembly may include a set of cutting tools and the moving assembly may have a set of moving wheels, which may move in any directions under the control of the control boards.

An agricultural mowing system includes: a driving vehicle having a steerable axle and a pivotable tongue and defining a travel axis; a first mower coupled to the driving vehicle; a second mower coupled to the tongue; a tongue actuator configured to pivot the tongue; a tongue angle sensor configured to output signals corresponding to a tongue angle of the tongue; and a controller operatively coupled to the tongue actuator and the tongue angle sensor. The controller is configured to: determine a lateral overlap or underlap of the mowers exceeds a threshold value based at least partially on the tongue angle and a steering angle of the steerable axle; determine a correction angle needed for the tongue to pivot such that the lateral overlap or underlap no longer exceeds the threshold value; and output a correction signal to the tongue actuator to pivot the tongue by the correction angle.

Systems and techniques for generating a set of connected segments for a device or system to traverse in order to reach every point of the region (a coverage plan). Nodes defining the region to be traversed define a polygon. The polygon is decomposed into a mesh and a graph of the mesh is generated. The graph may be used to determine a longest funneled path which, in turn, may be used to either optimize for a longest path or to divide the polygon for eroding sides. The longest path and/or erosions are used to define a set of segments. The segments are connected, which in some examples is done via an optimization to minimize an amount of time or energy to traverse all segments and connections. The resultant coverage plan is sent to a system configured to receive the plan and traverse the region.

A method docks an autonomous mobile green area maintenance robot to a docking station. An electrical conductor arrangement runs in the region of the docking station, wherein the conductor arrangement is designed such that a periodic current flows through the conductor arrangement, wherein the current generates a periodic magnetic field. The green area maintenance robot has two magnetic field sensors, wherein the two magnetic field sensors are designed such that the magnetic field respectively causes a periodic sensor signal in the magnetic field sensors. The method has the steps of: determining a phase shift between the two sensor signals or signals based on the sensor signals, and controlling movement of the green area maintenance robot for docking on the basis of the determined phase shift.

A charging control system includes a lawn mower that has a battery and performs a lawn mowing work while traveling autonomously, and a charging station for charging the battery. The lawn mower includes a period calculator for calculating a shutoff period of supply power supplied from the charging station, and a first communication unit. The charging station includes a second communication unit communicating with the first communication unit, an information acquisition unit for acquiring shutoff period information indicating the shutoff period from the first communication unit via the second communication unit, a switch for shutting off the supply power, and a shutoff controller for controlling the operation of the switch. The shutoff controller releases the shutoff of the power supply to the lawn mower based on the shutoff period information.