Abstract: A method controls an apparatus comprising at least two sensors, and an active device interfering with signals detectable by the at least two sensors. The method comprises: detecting, by means of the at least two sensors, signals at different points in time, the signals including burst signals from a signal source, storing data indicative for the detected signals in a memory, comparing signal values determined based on the data indicative for the signals stored in the memory of three different points in time with one another to differentiate the signal values into a low signal value, an intermediate signal value and a high signal value, subtracting the intermediate signal value from a current signal value detected by means of at least one of the at least two sensors to obtain at least one processed signal value and controlling operation of the apparatus based on the processed signal value.

Abstract: A method navigates a robotic mower (2) comprising at least one sensor (12; 14). The method comprises detecting (S101), by means of the at least one sensor (12, 14), at least one signal from a wire (8) as a first signal source; controlling (S106) the robotic mower (2) to follow the wire (8) at a first distance (D1) to the wire (8); detecting (S108), by means of the at least one sensor (12, 14), at least one signal from a second signal source; detecting (S109) a second distance (D2) based on the at least one signal from the second signal source; and navigating (S110) the robotic mower (2) along a path determined based on the first distance (D1) and the second distance (D2).

Abstract: A garden tool includes a cutting assembly, a first driving device and a height adjustment assembly. The first driving assembly includes a prime mover fixedly mounted on a tool body and a transmission mechanism that transmits power output by the prime mover to the cutting assembly. The transmission mechanism is used to transmit the power output by the prime mover to the cutting assembly to drive the cutting assembly to work. The height adjustment assembly is used to drive the cutting assembly to move in a direction perpendicular to a working plane, so as to adjust a distance of the cutting assembly from the ground. The garden tool of the disclosure directly adjusts a height of a mower from the ground through the height adjustment assembly without adjusting a position of a heavy motor.

Abstract: The disclosure provides a charger, a charging device, an energy supply device and a control method of the charger. The charger comprises a housing, a charging position, a charging port and a first heat dissipation unit. The charger comprises a base and a supporting part. The supporting part is arranged on the base. The charging position is arranged on the base and distributed around the supporting part. The charging port is arranged on the charging position and matched with a battery pack. The first heat dissipation unit is arranged on the supporting part for heat dissipation of the battery pack. With the charger of the disclosure, multiple battery packs can be charged at the same time.