| 摘要 |
<p>Solar energy collection apparatus includes a solar energy receiver (12) defining a primary target to receive directed sunlight; and a field of heliostats (15) mounted for angular adjustment to optimally receive a beam of sunlight and direct it to the primary target of the solar energy receiver. Actuator means (60, 62) is provided to effect the angular adjustment of each heliostat of the field. A secondary target at or spaced from the primary target is disposed so as not to be intercepted by the optimally received and directed beams of sunlight. A controller (40) is operably coupled to the actuator means and is configured to sequentially cause, during operation of the solar energy collection apparatus, a temporary angular adjustment of the respective the heliostats so as to divert the beam of sunlight received at each heliostat to the secondary target for a predetermined period of time. Recordal means (35) is provided to record a representation of each diverted beam at the secondary target. The controller is also coupled to the recordal means and is further configured to respond to the representation of the diverted beam for the respective heliostats when a parameter or element thereof deviates from a reference norm, by activating the actuator means to angularly adjust the corresponding heliostat to improve the accuracy of its receipt of the beam of sunlight and direction of the beam to the primary target, thereby compensating by closed loop control of the field of heliostats during operation of the apparatus for tolerances in heliostat and actuator geometries.</p> |
