基于FPGA数字相位差测量的软件仿真  

The Software Simulation of Phase-offset Measuring Based on FPGA

作　　者：陆毅[1] 罗印升[1] 张贵祥[1] 刘晓杰[1] 

机构地区：[1]江苏理工学院电气信息工程系,江苏常州213001

出　　处：《实验室研究与探索》2014年第8期105-108,147,共5页Research and Exploration In Laboratory

基　　金：2011年教育部人文社会科学研究专项任务项目(11JDGC008);2011年江苏省高等教育教改立项研究课题(2011JSJG149);江苏省省级精品课程(苏高教函[2010]4号)项目;2013江苏省大学生创新创业训练计划资助项目

摘　　要：采用计数法,将相位量转换为数字脉冲量,然后对数字脉冲进行测量从而得到相位差值。软件仿真通过FPGA的50 MHz高速有源晶振,产生标准的0.02μs时基单位,在脉宽时间内对时基信号计数,得到与相位差成线性关系的数据,通过FPGA的数据口将测量所得数据传送到MSP430主控单元,由单片机实时处理得到两者信号的相位差值。整个仿真模块包含分频模块、信号产生控制模块、计数模块与数据输出模块,本文给出了各模块的仿真过程和仿真波形,结果表明可给出较为准确的相位差的测量。The standard unit 0.02 μs generated by 50 MHz FPGA crystal counts on base signal during the pulse width.Firstly,these data which have a linear relationship between phase-offset are obtained correspondingly.Secondly,the measured data have been transmitted to the main control unit MSP430 by the dataport of FPGA.Finally the values of phase-offset between two signals have been processed by real-time MSP430.Entire simulation module contains frequency module,signal generator control module,counting module and data output module.The process and waveform of each module simulation are given in this paper.The results indicate that the measuring of the phase-offset in this way should be approximately accurate.

关 键 词：可编程逻辑器件 分频模块 信号产生控制模块 计数模块 数据输出模块 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]