作者：狄旭明, 吴建平

作者单位：成都理工大学核技术与自动化工程学院, 四川 成都 610059

关键词：数据采集; 多通道高分辨率采样; FPGA器件; ARM处理器; AD7656转换器

摘要：

针对目前大多数采集系统无法实现多通道高分辨率采样及携带不方便等情况,提出了一种基于USB的多路数据采集系统的设计方法。系统利用ARM+FPGA+AD7656的系统组合实现16路通道同步信号采样,FPGA用于实现对A/D转换的逻辑控制,通过ARM7处理器对A/D转换数据进行处理,再由USB接口与计算机进行数据通信。测试结果表明,基于FPGA与ARM的多通道数据采集系统结构简单、控制方便、设计成本较低,能够准确快速地对16路信号同时进行采集。

Multi-channel data acquisition system base on USB

DI Xu-ming, WU Jian-ping

College of Applied Nuclear & Automation Engineering, Chengdu University of Technology, Chengdu 610059, China

Abstract: As most current acquisition systems can not implement multi-channel sampling with a high-precision and are inconvenient to carry, it has been put forward a design of multi-channel data acquisition system based on USB. The system uses the compound mode of ARM+FPGA+AD7656 to implement 16-channel synchronous sampling. The FPGA is used to complete the logic control of the A/D conversion, and use the ARM7 processor to process the data of A/D conversion. Then the system would communicate with computer through the USB interface in order to transmit the result data of A/D conversion. The test result shows that the multi-channel data acquisition system based on FPGA and ARM has the advantages of simple structure, lower design cost and convenient control. The system is able to pick up signals quickly and accurately through 16 channels simultaneously.

Keywords: Data sampling; Multi-channel parallel sampling; FPGA; ARM; AD7656

2010, 36(2): 81-83,96  收稿日期: 2009-8-28;收到修改稿日期: 2009-11-7

基金项目: 

作者简介: 狄旭明(1985-),男,四川成都市人,硕士研究生,专业方向为智能仪器设计。

参考文献

[1] 刘书明,刘 斌. 高性能模数与数模转换器件[M]. 西安: 西安电子科技大学出版社,2000.
[2] 陈茹梅,郭建硕. AD7656型模/数转换器在信号采集系统中的应用[J]. 国外电子元器件,2006(2):67-71.
[3] 常铁原,王 欣,卢冬冬. AD7656与LPC2210的并行采集接口设计[J]. 单片机与嵌入式系统应用,2008(12):10-11.
[4] 朱维钧,周有庆,王忧忧. AD7656及其在电力系统测控中的应用[J]. 电工材料,2007(2):47-50.
[5] 党瑞荣,汤小松,王成莉. 基于AD7656的高性能输电线监测系统设计[J]. 计量与测试技术,2008(9):8-10.
[6] 陈乃阔,李 萌. 基于CAN总线的条码扫描器管理系统[J]. 中国测试技术,2008,34(6):73-76.
[7] 刘小林,范育兵. 基于FPGA的多通道数据采集系统设计[J].电子技术与应用,2009.