文档介绍：毕业论文
微生物燃料电池内阻测试仪设计
摘要
微生物燃料电池(MFC) 是一个微生物催化有机化学能直接转化为电能的生物反应器。微生物燃料电池同时能净化污水和收获电能,这样可以降低污水处理的成本,因而近年来受到了广泛关注。然而,目前 MFC输出功率还很低,比普通的氢气燃料电池要低3~4个数量级,微生物燃料电池的产电能力通常是用最大输出功率密度来衡量的,当外电阻等于电池的内阻时,外部电池输出功率达到最大。研究表明,内阻是限制微生物燃料电池产能的一个重要因素,而测量MFC内阻的组成是提高MFC产电能力的前提。本文总结了目前国内外有关微生物燃料电池内阻的研究成果,系统介绍了微生物燃料电池内阻的构成、定义形式和常用的测量微生物燃料电池内阻的方法,设计了一个微生物燃料电池内阻测试的仪器,该仪器可以方便的测出微生物燃料电池的内阻,以期为提高MFC产电能力提出合理的建议。微生物燃料电池内阻测试仪主要由电源电路、信号采集系统、液晶驱动及显示电路和STC89C52单片机系统电路(包括模数转换电路)。
微生物燃料电池内阻测试仪的设计我采用内部带有A/D模数转换模块的STC89C52单片机来控制,通过取出微生物燃料电池内阻的压降,然后送入STC89C52单片机的A/D转换的输入端,经单片机处理,最后经过液晶显示器直接显示电阻阻值。该设计还包括量程自动转换功能,-2kΩ,具有了一般测试仪都有的基本功能。通过这次的设计让我了解到微生物燃料电池的相关知识,以及它在未来的发展趋势。总之,本设计的研究具有重要的理论意义和应用价值。
关键词:微生物燃料电池; 内阻; 构成; 测定方法;
ABSTRACT
The microbial fuel cell (MFC) is a microbial anic chemistry can be directly converted into electrical energy bioreactor. Microbial fuel cells harvesting electricity in the purification of sewage at the same time, can reduce the cost of sewage treatment, which in recent years received considerable attention. However, the MFC output power is still very low, lower than the normal hydrogen fuel cell 3 to 4 orders of magnitude, the production of microbial fuel cell power generation capacity is usually measured in terms of maximum output power density, equal to the internal resistance of the battery when the external resistance , the external battery output power reaches the maximum. Studies have shown that resistance is an important factor limiting microbial fuel cell capacity, measurement of MFC internal resistance of position to improve the ability of MFC electricity premise. This paper summarizes the research on microbial fuel cell internal resistance, the system introduces the definition of microbial fuel cell internal resistance in the form constitutes the internal resistance and the measurement of microbial fuel cell, designed a microbial fuel cell internal resistance test instrument, the instrument can measure the internal resistance of the microbial fuel cell, i