| 采用DMA技术的真实并行多路高速数据采集系统 |
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| 引用本文： | 杨建华,侯宏,王磊,陈楸.采用DMA技术的真实并行多路高速数据采集系统[J].数据采集与处理,2002,17(1):77-80. |
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| 作者姓名： | 杨建华 侯宏 王磊 陈楸 |
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| 作者单位： | 1. 西北工业大学自动控制系,西安,710072
2. 同济大学中德学院,上海,200092 |
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| 基金项目： | 航空科学基金 (编号 :971 5 31 2 2 )，自然科学基金 (编号 :6 990 2 0 0 6 )资助项目 |
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| 摘 要： | 介绍了DMA技术在真实并行多路高速数据采集系统中的应用原理及硬件实现技术，基于该技术和ISA总线，采用MAXIM公司MAX120模数转换芯片，设计的四路真实并行多路AD信号转换系统，成功地应用于某所研制的“继电器触点性能微机自动测试系统”中。
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| 关 键 词： | ISA总线 高速数据采集系统 DMA技术 A／D转换器 |
| 文章编号： | 1004-9037(2002)01-0077-04 |
| 修稿时间： | 2000年4月4日 |
A Ture Parallel Multi-Channel High Speed Data Acquisition System |
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| Yang Jianhua,Hou Hong,Wang Lei,Chen Qiu.A Ture Parallel Multi-Channel High Speed Data Acquisition System[J].Journal of Data Acquisition & Processing,2002,17(1):77-80. |
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| Authors: | Yang Jianhua Hou Hong Wang Lei Chen Qiu |
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| Affiliation: | Yang Jianhua 1) Hou Hong 1) Wang Lei 2) Chen Qiu 1) |
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| Abstract: | A high speed data acquisition system, which is true parallel and multi-channel, has been accomplished and applied successfully in an actual project whose title is the system of the properties of the relay contact test automatically via PC control. In this paper, principle and procedures of achieving such a system are presented on the basis of using direct memory access (DMA) technology. Four-channel high-speed online sampling system is implemented using MAX120 as an A/D converting chip. The maximum data sampling frequency is 200 kHz under DMA model and the A/D word length is 12 bit. Experimental results prove that the sampling system has a higher sampling speed and an enough sampling difference ratio and it can be used in many real control systems. |
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| Keywords: | data acquisition ISA bus A/D transformation |
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