文档介绍：基于TMS320F2812的数据采集及FFT设计
摘要
数据采集与处理是计算机应用的一门关键技术,主要研究信息数据的采集、存储和处理。数据采集与处理技术在工业控制系统中应用广泛。离散傅立叶变换是将离散信号分解为幅值分量和频率分量,是数字信号处理领域的工具之一,但是由于其计算量太大,应用受到限制。快速傅立叶变换的出现,使得DFT在实际应用中得到了广泛的应用。由于多数DSP芯片都能在一个指令周期内完成一次乘法和一次加法,而且提供专门的指令,使得FFT算法在DSP芯片上实现的速度更快。
本文中主要采用TI的32位定点数字信号处理芯片TMS320F2812作为信号采集和处理的核心,通过片上的12位模数转换模块进行数据采集,对采集到的数据进行信号处理。本文给出了数据采集系统硬件的外围调理电路。
在介绍了DSP原理,TMS320F2812芯片资源,S)的基础上,对数据采集模块、采样原理及在TMS320F2812上的FFT实现作了细致的描述和分析。
关键词: 数据采集;数字信号处理器;模数转换器;FFT
Design of Data Acquisition System and FFT
Based on TMS320F2812
Abstraet
Data acquisition and processing e an important technology puter application, which mainly studys the collection,storage and processing of information of data acquisition and processing is widely applied in industry control system. Discrete Fourier Transform is one of the main tools in digital signal processing field. But because of its plexity,its application is ,with the appearance of Fast Fourier Transform,DFT is widely used in practical most chips of DSP plete a multiplication and an addition in an instruction period,and they can provide the specialized instruction of FFT,it accelerates the speed of the FFT algotithm working on the chip of DSP.
This paper takes the 32 bits fixed-point digital signal processing processor TMS320F2812 of Texa pany as the core of signal acquisition and processing data acquisition pleted by the 12 bits A/D convertor of then do the signal processing on collected dissertation points out the periphery circuit of data acquisition system
Based on the introductions of DSP principle,chip resources of TMS320F2812 and poser S)of TMS320,the dissertation describes and analyses the acquisition module and sampling theory of data and the achievement of Fast Fourier Transform on TMS320F2812 in great detail.
Keywords : data collection;digital signal processor;A/D converter;FFT;
目录
引言 1
第1章绪论 2
2
2
FFT简介 3
第2章