| 摘要 |
A control system for controlling an operating zone(2; 102) comprises a transmitting unit (6; 106) for transmitting an electromagnetic radiation ray (7) that is interceptable by a body in said operating zone (2; 102), a receiving unit(8) for receiving said ray (7), electric power means (9, 10, 11) for powering said transmitting unit (6; 106), said electric power means (9, 10, 11) comprising a photovoltaic device (9) and an emitting device (11) for emitting radiant energy to said photovoltaic device (9). |
