相位测量仪的设计 毕业论文 毕业设计及文献综述.doc

摘 要 本文设计的是低频数字相位测量仪。本设计采用的是MCU与FPGA相结合的方法来设计的，设计将硬件系统分为数据采集处理和单片机最小系统两部分，充分发挥单片机控制运算能力强的特点和FPGA数据采集速度快、资源丰富的特点。数据的采集部分利用FPGA完成，可以准确地采集到两个同频正弦信号的相位差所对应的时间差以及信号的周期，更好地提高系统的可靠性。然后根据单片机具有较强的运算、控制能力的特点，我们使用单片机最小系统完成读取FPGA的数据，并根据所读取的数据计算待测信号的频率及两路同频信号之间的相位差。同时通过功能键的切换，由显示模块显示待测信号的频率和相位差。 关键字：数据采集; 单片机; 频率; 相位差; Abstract This paper is designed to phase low-frequency digital measuring instrument. this design which uses the combination of The MCU and FPGA will be divided the hardware into two parts of data acquisition processing and MCU minimum system ,it give full use to the features of MCU-controlled computing for power , the FPGA data acquisition for high speed and resource-rich . We use the FPGA to complete collection of the data, so we can accurately collect the phrase difference between the two-phase sinusoidal signal, corresponding to the time difference and the cycle of signal, so as to greatly improve the reliability of the system. Then according to characteristics of the shrapnel-strong operation and the ability to control, we use the minimum system of MCU to complete the reading of data FPGA, according to the data read calculate the frequency of signals under test and the phase difference between the two-way same frequency signals. At the same time, through the switching of function keys, the frequency and phase of signals under test will be showed by module Keyword：DataAcquisition; SCM; Frequency; phase 目 录 1 绪论 .........................................................................1 1.1 相位测量原理 .................................................2 1.2 输入与采集 ...................................................2 1.3 频率的测量 ...................................................2 1.4 相位差对应的时间差的测量 .....................................3 2 设计要求与设计方案 ...............................................4 2.1 设计要求 ....................................................4 2.2 设计方案 ....................................................4 2.2.1 设计思路 ........................