Solar tracking sensor based on fiber light guidance

1:

• A solar tracking sensor based on optical fibers, including a light collecting module and a signal acquisition module, wherein the light collecting module is composed of a fine-positioning module and a coarse-positioning module, and the signal acquisition module is composed of photoelectric elements and an acquisition circuit board;
• wherein the fine-positioning module comprises a convex lens, a lens tube, a fixing tube and four fine-positioning optical fibers, wherein the convex lens is installed at a top of the lens tube, and the input end faces of the four fine-positioning optical fibers are fixed under the convex lens by the fixing tube, wherein centers of the input end faces of four fine-positioning optical fibers form a square lattice, wherein orientations of the input end faces of the four fine-positioning optical fibers are defined as four directions of A, B, C and D respectively, and a central axis of the lens tube is perpendicular to the input end faces of the four fine-positioning fibers;
• wherein the coarse-positioning module comprises four coarse-positioning optical fiber groups, wherein input ends of the four coarse-positioning optical fiber groups are distributed uniformed on an outside surface of the lens tube, and located in the four directions of A, B, C, and D respectively, the number of coarse-positioning optical fibers in each coarse-positioning optical fiber group is the same, the coarse-positioning optical fibers are passed through the lens tube, the input ends of the coarse-positioning optical fibers are on the outside surface of the lens tube, and the angle between the central axis of the lens tube and the vertical line of the input end of each coarse-positioning optical fiber is greater than αmax, wherein αmax is a maximum incidence angle of the coarse positioning optical fibers;
• wherein the signal acquisition module comprises four photovoltaic cells, a dark box and a circuit board, wherein the dark box is located on a bottom of the lens tube, wherein the dark box is divided into four dark lattices and arranged in the four directions of A, B, C, and D, respectively, wherein the photovoltaic cells are distributed such that each dark lattice contains a photovoltaic cell, wherein a circuit board is arranged on the inner bottom surface of the dark box, and the photovoltaic cells are integrated on the circuit board;
• wherein input end centers of the fine-positioning optical fibers, the coarse-positioning optical fibers and the photovoltaic cells in the directions of A and C are located in a same plane, and the input end centers of the fine-positioning optical fibers, coarse-positioning optical fibers and the photovoltaic cells in the directions of B and D are located in a same plane, wherein four fine-positioning optical fibers and the four coarse-positioning fiber groups form four lighting groups, each of which includes a fine-positioning optical fiber and a coarse-positioning optical fiber group in the diagonal direction, and all the output ends of optical fibers in each lighting group are passed through the dark box, arranged in a dark lattice of the dark box, and connected to a photovoltaic cell, wherein the photovoltaic cells are connected to the corresponding light collecting modules, respectively.