| 摘要 |
PCT No. PCT/GB92/02038 Sec. 371 Date May 4, 1994 Sec. 102(e) Date May 4, 1994 PCT Filed Nov. 4, 1992 PCT Pub. No. WO93/09378 PCT Pub. Date May 13, 1993.A solar panel unit includes a solar panel (10) supported for rotation about a frame (13) and driven around the frame (13) by an electric motor (14). Radiation sensors (22) and (23) have their planar axes equally and oppositely off-set from the planar axis of the panel (10). Signals from the sensors (22) and (23) are monitored and used to control the operation of the motor (14) such that the panel (10) moves as the sun moves during daylight hours and the panel remains with its planar axis at right angles to rays of the sun throughout the day. |
