LED Solar Simulator

Sunlight is the most common source of light in life and the cleanest source of energy,but sunlight changes over time.Simulating stable and reliable sunlight is of great value in many industries.The solar simulator is used for A standard light source that simulates sunlight.Solar cell testing is a common teaching experiment,and solar cell testing requires a solar simulator as a standard source.The traditional solar light simulator uses xenon lamp as the light source.Because the lamp needs 20 kV high voltage start,it has certain danger,which is not conducive to the use of teaching experiments.Therefore,it is very important to develop a solar simulation device suitable for college experimental teaching.This paper mainly designs and implements an LED solar simulator suitable for experimental teaching.LED light source spectrum is full color,through a variety of LED combinations can be a good match to the solar spectrum,and low operating voltage,long life,easy to control brightness,high security,very suitable for experimental teaching applications.This paper elaborates on the manufacturing process of LED solar simulator from simulation to design to hardware and software implementation.The simulation part searches for the optimal spectral matching result based on genetic algorithm,and then uses this result to generate data training neural network,and finally realizes a neural network based spectral matching algorithm.The hardware part mainly includes the design of LED solar simulator,the driving power of LED solar simulator,the circuit design and processing of multi-channel adjustable low-voltage constant current power supply.The software part mainly includes the software design of the lower computer based on stm32 platform and based on Qt's PC software design.At the end of this paper,the LED solar simulator is tested and applied to the solar cell test system.The LED solar simulator designed in this paper realizes the A-level spectral matching,which can basically meet the needs of teaching experiments,but there is still room for improvement.At the end of the paper,the improvement ideas are given.