US4786795A - Sun Tracking Device Floating Upon Liquid Surface - Google Patents
Such a system is disclosed in Japanese Patent Laid Open Publication No. 58-193510, among different sources. It's a further object of the present invention to supply such a sun tracking device can cut back the drive vitality necessities for driving the rotatable table to a particularly low degree, and might help and drive the rotatable desk with a easy construction. FIGS. 4(a) to 4(c) are illustrative drawings for describing the solar tracking action of the first most well-liked embodiment solar tracking device. FIG. 5 is a aspect view thereof. FIGS. 6(a) to 6(c) are plan view for illustrating the sun monitoring motion of the second most popular embodiment solar tracking device. FIG. 8 is a plan view thereof. FIG. 9 is a aspect view thereof. FIG. 10 is a plan view exhibiting a photo voltaic energy generating system which incorporates a fifth preferred embodiment of the sun tracking device in line with the present invention.
FIGS. 1 via four present a photo voltaic power producing system with incorporates the first preferred embodiment of the solar tracking device of the present invention, which is constituted to be organized on a body of water akin to a sea or a lake. This fastened shaft 1 is erected in a typically perpendicular orientation with its base end buried within the lake or sea bottom, and is strengthened by man wires three extending slantingly downwards from a mid level of the fastened shaft 1, whose different ends are engaged to the lake or sea backside. 2 is internally equipped with a floatation force providing means which can include a set of buoys or the like, or is externally supplied with a floatation power providing means which may be a set of buoys fabricated from urethane, rubber or the like and thereby is triggered to float on the floor of the water in a typically horizontal orientation whereas being considerably freely rotatable in a horizontal aircraft concerning the vertical central axis of the fastened shaft 1, with a certain quantity of play of the rotatable desk 2 relative to the central axis of the mounted shaft 1 being allowed, each in the sideways direction, in the longitudinal path and with respect to angular turning relative to the fixed shaft 1, in order to compensate for transitory undulations equivalent to waves of the water surface which cause wobbling of the rotatable desk 2 with respect to the fastened shaft 1 by way of a certain wobbling vary.
2 is provided with a plurality of photo voltaic cell arrays 6 equivalent to 6a, 6b and 6c which are used for energy era, and ItagPro further carries a pair of photo voltaic cell arrays 7 and eight which function sensors, and the circumference of the rotatable desk 2 is additional provided with two tracking drive mechanisms 11 and 12, which respectively comprise screws 10a and 10b and DC motors 9a and 9b respectively drivingly coupled thereto. 6a, 6b, and 6c are organized on the rotatable table 2 in a mutually spaced manner with their lengthy axes being considerably parallel, and, as will probably be seen later, for an exemplary one of these techniques put in in the northern hemisphere, are directed usually to the south with a sure inclination to the east or to the west of south in accordance with the position of the sun, being swiveled a few vertical axis because the rotatable desk 2 turns in regards to the axis of the fixed shaft 1 in line with the motion of the sun as shall be seen later.
6a, 6b and 6c is appropriately adjusted in line with the latitude of the placement when the photo voltaic energy producing system is put in. 7 and 8 are organized in a symmetrical manner on both side of the axis of symmetry of the development, which is perpendicular to the long axes of the photo voltaic cell arrays 6a, 6b and 6c and passes by the rotational shaft 4, ItagPro and the solar cell arrays 7 and 8 are angled as an illustration at an angle of about 30° to the axle of symmetry, as exemplarily shown in FIGS. 2 and 3, with their light receiving surfaces confronted inwardly. 7 and 8 could also be canted or sloped, in order to receive a very good and ample amount of solar light, relying upon the latitude of set up of the photo voltaic power generating system. 10a on the rotatable desk 2 is akin to to turn the rotatable table 2 within the anticlockwise route as seen in the figure, while however the rotational force exerted by the motion of the screw 10b on the rotatable desk 2 is akin to to show the rotatable table 2 in the clockwise path as seen within the figure.