Patent ID: 8621833
Filing Date: 2014-01-07
Classification: A01D,E02F,G01B,G01P,G05B

Abstract:
1. A lawn mowing vehicle that mows a lawn along a travel path, comprising: at least three wheels; at least one electric reel unit having a rotating blade driven by a motor; a speed detection unit detecting a number of revolutions per minute of at least one of the wheels of the vehicle; and a control unit that controls the motor depending on the detected result of the speed detection unit, thereby controlling a rotational speed of the rotating blade installed on the electric reel unit, wherein the rotating blade is configured so that a rotational shaft thereof is set in a leftward/rightward direction of the vehicle with respect to a traveling direction, and the control unit obtains the traveling speed of the vehicle on the basis of the number of revolutions per minute of at least one of the wheels of the vehicle detected by the speed detection unit and on the basis of an effective diameter of the at least one of the wheels, the traveling speed v, in kilometers per hour, of the vehicle obtained by the control unit, based upon one wheel of the vehicle, being given by the expression: n being the number of revolutions per minute of the one wheel detected by the speed detection unit and d being an effective diameter of the one wheel in millimeters.