谢斌,
王华涛
北京科技大学自动化学院 ??北京 ??100083
基金项目:国家自然科学基金(61672094)
详细信息
作者简介:王粉花：女，1971年生，副教授，研究方向为智能信息处理、模式识别及嵌入式技术
谢斌：男，1995年生，硕士生，研究方向为智能检测技术与设备
王华涛：男，1993年生，硕士生，研究方向为智能检测技术与设备
通讯作者:王粉花 wangfenhua@ustb.edu.cn
中图分类号:TP274; TH89计量
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被引次数:0
出版历程
收稿日期:2018-03-16
修回日期:2018-10-16
网络出版日期:2018-10-23
刊出日期:2019-01-01
Design of Fast Differential Frequency Measurement System Based on FPGA
Fenhua WANG,,Bin XIE,
Huatao WANG
School of Automation, University of Science and Technology Beijing, Beijing 100083, China
Funds:The National Natural Science Foundation of China (61672094)
摘要
摘要:针对电子测量中如何对基频较高而频率变化值较小的动态信号进行高精度频率测量的问题，引入了差频测量的方法。该文提出一种新型的动态可调的多级差频电路结构，设计了基于FPGA的快速差频测量系统，通过在FPGA上设计快速傅里叶变换(FFT)算法来实现系统的数据处理功能。仿真结果表明，在满足差频条件的基础上，合理设计多级差频电路的结构能够实现高精度频率测量，在进行信号频谱分析时能得到较为准确的结果。实验验证了该测量系统能够实现快速FFT运算，相比于MATLAB软件平台，在数据处理效率上有明显的优势；同时在性能指标满足数据采集要求的前提下，系统可动态调整FFT模型的结构来适应不同规模点数FFT运算的需求。
关键词:差频测量/
FPGA/
快速傅里叶变换
Abstract:For the problem of high precision frequency measurement of dynamic signals with high fundamental frequency and small frequency change value in electronic measurement, a method of differential frequency measurement is introduced. A novel dynamic adjustable multi-stage frequency-difference circuit structure is proposed. The fast differential frequency measurement system based on FPGA is used to design the Fast Fourier Transform (FFT) algorithm on the FPGA to realize the data processing function of the system. The simulation and experimental results show that the structure of the multi-stage differential frequency circuit can be designed with high precision frequency, and the result can be obtained when the spectrum analysis is carried out. The system can realize the fast FFT operation. Compared with the MATLAB software platform, the system has obvious advantages in the efficiency of data processing. The structure of the FFT model can be dynamically adjusted to meet the requirements of FFT operation of different scale points, and the system performance index can meet the requirements of data acquisition system.
Key words:Differential frequency measurement/
FPGA/
FFT
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