Microprocessor-Based, Solar Cell Parameter Measurement System

摘要

The effects of the space environment on solar cells has, to date, been largely modeled and approximated in the design of solar arrays. Restrictions such as weight and cost have precluded direct analysis of the long term effects of radiation in space. At the Naval Postgraduate School (NPS), a simple circuit has been devised which facilitates in situ data collection and analysis of these effects. The circuit includes an op-amp and a high beta transistor for cell voltage biasing. When coupled to a microprocessor-based controller system, this circuit has the capability to measure and store data pertaining to solar cell performance I-V curves. The complete system consists of an NSC 800 microprocessor, D/A and A/D components, analog multiplexers and demultiplexers, biasing transistors and op-amps. This design provides a compact, low power, accurate method for I-V measurement and data storage. Such a system may be used to observe and monitor an array of test cells and their performance degradation in both the space environment and terrestrial applications. Keywords: Solar cells, Space measurement, Autonomous control, Theses. (MJM)