| 摘要 |
<p>A heliostat 100 driven by a control system comprises a moveable main mirror 3 for directing sunlight at a target device, a moving means, such as linear actuators 5, 6, for moving the main mirror about an axis of rotation (b-axis), one or more rotating sensing mirrors (13a, 13b; fig.3), one or more photosensors 17, a photosensor direction-sensing controller, and an angular sensor (14, fig.3). The axis of rotation of the one or more sensing mirrors is parallel to the axis of rotation of the main mirror and positioned along a line connecting the axis of rotation of the main mirror to the target device. The axis of rotation of the one or more sensing mirrors may be coaxial with the axis of rotation of the main mirror. A heliostat with a support and drive mechanism may incorporate the above optical control system such that, in use, the azimuth angle and vertical inclination of the heliostat main mirror can be varied in order to track the movement of the Sun.</p> |
