Research On Solar Cell Detection System Based On Wireless Sensor Network

The characteristic parameters of solar cells are an important basis for measuring the performance of solar cells,at the same time,providing a theoretical reference for the optimization of solar cell manufacturing process.At present,most of the solar cell detection systems used by solar cell module manufacturers are expensive and bulky,which is difficult to promote with a large scale.In view of this situation,this project proposes a solar cell detection system based on wireless sensor network to realize the real-time detection of the characteristic parameters of solar cells.The specific work is as follows:1.The system combines ZigBee technology with solar cell parameter detection,to construct terminal detection node,coordinator node and host computer monitoring system.Among them,the terminal node mainly completes the collection,display and transmission of open circuit voltage,short circuit current,illumination and temperature of solar cells.The coordinator node was connected with the host computer monitoring system through the serial port,receives the data which sent by the terminal node,and displays it in the host computer data receiving area in real time.2.The terminal data detection node uses STM32F407ZG6 as the main controller,and was equipped with CC2530 module to send the measured data to the host computer monitoring terminal by the star network in a round robin manner.The host computer can display the detection data of each terminal in real time and store the historical data for later data analysis and processing.In terms of data processing,the Lambert W function is combined with the actual solar cell model,and the exhaustive fitting algorithm is used to process the current data measured by the system through the algorithm to obtain the solar cell short-circuit current.Finally,the V-A characteristic curve was drawn by using the data which was measured by the detection system.3.The circuit welding of the hardware part and the program development of software part are completed,and completes the joint debugging.Through multiple measurements of solar cell samples,the measured data was processed by exhaustive fitting algorithm,and get the system test results.Finally,the system test results were compared and analyzed with the relative standard values.The measurement error of open circuit voltage does not exceed 1%,and the measurement error of short circuit current does not exceed 4%.The results are in line with the expectations.Experimental verification shows that the detection system has high cost performance,good stability,low power consumption,and has a good development prospect,which provides a reference for the research of solar cell testers.