一种基于FPGA电路的扫频时间检测技术  

A frequency sweep time detection technology based on FPGA circuit

作　　者：牛红涛[1] 黄建琼[1] 张志峰 王巍[1] 马轲瀛[1] NIU Hongtao;HUANG Jianqiong;ZHANG Zhifeng;WANG Wei;MA Keying(National Institute of Measurement and Testing Technology,Chengdu 610021,China)

机构地区：[1]中国测试技术研究院,四川成都610021

出　　处：《现代电子技术》2020年第20期14-17,22,共5页Modern Electronics Technique

基　　金：四川省重大科技专项项目(2018TZDZX0002);四川省重大科技专项项目(2019ZDZX0034);四川省科技项目(2017GFW0004);四川省科技项目(2018GFW0187);2019基本科研业务费。

摘　　要：时间频率技术已广泛应用于通信、仪表和自动控制系统等众多领域,为了改进低频方波信号的扫频时间检测技术,提出一种新的基于FPGA电路的扫频时间检测技术。详细介绍扫频时间检测装置的检测系统原理,并对扫频时间检测算法进行理论分析。设计基于FPGA控制芯片的扫频时间检测电路,实现低频扫频时间参数的自动检测功能。通过与高性能示波器测量方法得到的结果进行比较和分析,结果显示,该文提出的方法检测效率远远高于高性能示波器测量方法,且具有测量稳定及测量精度高的优点。在制动时间、转速、车速以及瞬时速度等参数的检测校准领域有重要的应用价值。The time frequency technology has been widely used in many fields such as communication,instrument,automatic control system,etc.A new frequency sweep time detection technology based on FPGA circuit is proposed to improve the frequency sweep time detection technology for low⁃frequency square signal.The principle of the detection system for frequency sweep time detection device is introduced in detail,and the frequency sweep time detection algorithm is analyzed theoretically.The frequency sweep time detection circuit based on the FPGA control chip is designed,so that the automatic detection function of the low⁃frequency sweep time parameter is realized.The results obtained by the measuring method of high⁃performance oscilloscope and the results obtained from the proposed method are compared and analyzed.The results show that the detection efficiency of the proposed method is much higher than that of the high⁃performance oscilloscope measurement method.It has the advantages of high measurement stability and high measurement accuracy,and has important application values in the detection and calibration fields of parameters such as braking time,rotational speed,vehicle speed and instantaneous speed.

关 键 词：扫频时间检测 检测装置 检测电路设计 软件设计 参数检测 结果分析 

分 类 号：TN98-34[电子电信—信息与通信工程] TH71[机械工程—测试计量技术及仪器]