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 MAX1 2 0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。
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.
出处
《数据采集与处理》
CSCD
2002年第1期77-80,共4页
Journal of Data Acquisition and Processing
基金
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
