A sun tracking device

Abstract

The invention discloses a sun tracking device which comprises a thermal-expansion and cold-contraction element, a positioning disk and a pulley. The thermal-expansion and cold-contraction element is of a hollow barrel structure, the surface, facing the sun, of the thermal-expansion and cold-contraction element can extend relative to the surface, back against the sun, of the thermal-expansion and cold-contraction element, and therefore the end face of the thermal-expansion and cold-contraction element tilts. The positioning disk is fixedly arranged on the end face of the thermal-expansion and cold-contraction element, can be tilted along with the tilting of the end face of the thermal-expansion and cold-contraction element, and therefore the lowest point of the positioning disk is made to locate on the surface, back against the sun, of the thermal-expansion and cold-contraction element. The pulley is fixedly connected with a connecting piece and is located on the positioning disk, can move along a circular rail, concentrically arranged with the thermal-expansion and cold-contraction element, on the positioning disk along with the changing of the position of the lowest point of the positioning disk, and therefore the pulley can always stay on the lowest point of the positioning disk. The pulley can drive the connecting piece to rotate to enable external equipment which is fixedly connected with the connecting piece and needs to track the sun to rotate, and the tracking of the sun is achieved. The sun tracking device is high in sensitivity and accuracy, unattended operation can be achieved, and the sun tracking device is small in external environment influence, strong in reliability, small in size, simple in structure, and low in cost.

Description

technical field [0001] The invention belongs to the field of solar energy utilization, and more specifically relates to a sun tracking device. Background technique [0002] Solar energy is inexhaustible, the utilization forms are simple and diverse, and the technology is very mature. It has obvious advantages in the development of renewable energy and is the most widely used. Real-time tracking of the sun can effectively improve the utilization rate of solar energy. [0003] The current sun tracking technology is mainly divided into active tracking according to the sun's movement laws and passive tracking based on real-time detection of the sun's position. Active tracking technologies mainly include control release, clock and computer control. Both the clock type and the computer control type require an external power supply to drive the motor, and control the tracking by controlling the motor speed or using a precise computer program. The construction and operation costs o...

AI Technical Summary

Problems solved by technology

The device indirectly judges the position of the sun based on the temperature change of a single capsule in a day, and the accuracy is extremely low. Once the daily average temperature changes, the deformation of the capsule cannot correspond to the position of the sun, and the device must be manually adjusted many times

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