摘要
数据采集是信号与信息系统一个重要的组成部分，也是数字信号处理的关键环节。本论文主要介绍一种基于FPGA的数据采集系统，提出一种由串行A/D转换芯片ADS7822、低成本FPGA(Cyclone II)和RS232总线接口组成的数据采集系统方案，系统利用A/D器件对外界输入模拟电压信号模数转换。ADS7822转换输出的12位数字信号在FPGA内经过处理以后被传送到显示设备以及RS232串行口，最后通过RS232总线接口把暂存在FPGA苹果 迷失北京
的数据传送到PC主机，系统在Quartus II软件环境下，将满足系统功能的VHDL程序下载到FPGA内，FPGA设计的内部模块和时钟信号用来进行电路的控制及数据缓存和数据传送。在PC主机上，利用Labview软件编程显示采集到的电压曲线和电压值。FPGA作为数据采集系统的核心部件，完成了模拟电压的采集及内部电路的设计，使系统具有较强的可适应性、可扩展性、可调试性。 关键词：FPGA；数据采集；A/D转换；RS232；Quartus II；Labview
Abstract acm
The data acquisition is an important component of the signal and information systems, and also is the key link of the digital signal processing,天堂419草坪 This paper introduces an FPGA-based data acquisition system, propose a serial A/D conversion chip ADS7822 and low-cost FPGA (Cyclone II) and RS232 bus interface for data acquisition system周云杰 奥瑞金. The system uses A/D device converting the external input analog voltage signal to the digital. ADS7822 conversion output 12-bit digital signal transmitted to the RS232 serial port processed within the FPGA, transmit data 中国广播电视报which is temporarily stored in the FPGA to the host PC through the RS232 bus interface, the system in the Quartus II software environment, VHDL program to meet the system functions downloaded to the FPGA, the FPGA design of internal modules and the clock signal is used for circuit control and data cache and data transfer. using Labview programming display the collected voltage curve and voltage values on the host PC. FPGA as the core component of the data acquisition system, has completed the acquisition of the analog voltage and internal circuitry design, the system has a strong adaptability, scalability, debuggability.
astm
豫公网安备41160202000603
站长QQ:729038198
关于我们
投诉建议