1D psd based sun tracking sensor

Abstract

The sun tracking sensor based on one-dimensional PSD, the one-dimensional PSD is installed at the center of the bottom of the sensor shell; the self-limiting temperature electric warmer is set directly below the one-dimensional PSD; the inner wall of the sensor shell is threaded, and the lens holder is installed in sequence from bottom to top frame a, graphic diaphragm shelf, lens shelf b; the lens is installed on the lens shelf a or lens shelf b, and the focal length of the lens (4) is greater than the distance between the transparent protective top cover and the one-dimensional PSD; the graphic The diaphragm is placed on the graphic diaphragm shelf, the positioning line is perpendicular to the detection direction of the one-dimensional PSD, and the V-shaped opening of the V-shaped light-transmitting hole points to the positive direction of the one-dimensional PSD detection; four photosensitive devices are installed on the lens shelf a The top is arranged in a circumferentially symmetrical manner; the sun tracking sensor can judge the current sun position and realize compensation tracking of the sun position deviation, and the cost is low.

Description

technical field [0001] The invention relates to the field of non-imaging target tracking, more precisely, the invention relates to a high-precision sun position tracking device based on a PSD sensor. Background technique [0002] The high-magnification concentrating photovoltaic power generation system has the highest conversion efficiency among current photovoltaic power generation systems. The higher the concentrating lens is used, the higher the power generation will be. At the same time, the solar panels also require higher-precision sun tracking. When the concentration multiple is 1000 times, a tracking deviation of more than 0.15° will reduce the power generation of the system by more than 10%. Therefore, the sun tracking accuracy required by the high-power concentrated photovoltaic power generation system must reach more than 0.1°. There are usually three working modes of the sun tracking system: open loop, closed loop and a combination of the two. The open-loop work...

AI Technical Summary

Problems solved by technology

The closed-loop working method uses photoelectric sensors to measure and track the position of the sun in real time. At present, sensors with an accuracy of more than 0.1° include area array CCDs, two-dimensional PSDs, and four-quadrant photodetectors, etc., but such sensors are extremely expensive and have relatively high output. Complicated, increasing the difficulty of subsequent data collection and processing, and increasing the overall cost of the sensor

[0003] The detection of the sun position can also be realized by using two one-dimensional PSDs, but this method increases the system cost and the difficulty of subsequent data collection and processing, and two one-dimensional PSDs must work normally at the same time, which reduces the system stability

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