AKTUATOR MIT FORMGEDÄCHTNISLEGIERUNG IN EINER SONNENVERFOLGUNGSEINRICHTUNG, INSBESONDERE EINEM SONNENKOLLEKTOR

摘要

A shape-memory actuator device for maintaining an orientable member, in particular a solar generator (2), in a position aligned with the sun, comprises a distribution of lenses (12) for focusing the direct or indirect solar radiation (R) on a shape-memory element (13) as the position of the sun varies. The device further comprises a shielding member (14), which is connected in rotation to the orientable member (2) and is controlled by the shape-memory element (13) when the latter is activated following upon the heat generated by the solar radiation as far as a position in which it shields the lens (12) which is focusing the direct radiation (12). In said condition, the shape-memory element is de-activated, and the shielding member returns into a position in which it again uncovers the focusing lens (12). The shielding member thus continues to perform oscillations about the position aligned with the sun, following at the same time said position as the sun moves.