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| 摘要: |
| 已成为PC标准的通用串行总线USB(Universal Serial Bus)多点数据采集提供了很大的便利。概括了USB的特点，详细介绍了一种基于USB的数据采集系统，该系统利用单片机的I／O口经过三级驱动扩展．每级通过了译码产生所需要的信号，利用单片机控制USB芯片，很好地完成了448路开关量和16路模拟量的数据采集。 |
| 关键词: 数据采集 通用串行总线 A／D转换 |
| DOI： |
| 分类号:TP331 TP274.2 |
| 基金项目: |
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| Application of USB in data collection |
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ZHANG Hai-feng SU Tao ZHANG Deng-fu
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| Abstract: |
| PC standard USB ( Universal Serial Bus ) supplies advantages for multi-access data collec-tion.The specialties of USB are summarized and a data collection system based on it is introducd ,which uses the I/O ports of single-chip microprocessor and generates needed signals via3-step driving expansion and de-coding.The data from448binary channels and16analog channels are successfully collected using USB under control of single-chip microprocessor. |
| Key words: data collection,USB,A/D convert, |
