| 摘要 |
PURPOSE:To lower the noise level at the time of searching for a target and enable to catch the target securely, by a method wherein travelling body is made to run at a low speed when searching for a target. CONSTITUTION:A target chasing circuit is constituted of a receiver 1 which catches an acoustic wave reflected or emitted from the target, an amplifier 2 which amplifies the signal being received, and a controller 3 which controls a steering mechanism 4 in accordance with a signal from the amplifier 2. The chasing circuit is connected with the speed controller 7 which controls through a main circuit device 8 a propeller-driving motor 9 to operate at a low speed thereby lowering the noise level, until the receiver 1 catches the acoustic wave from the target. |
