单片机AT89C51在UHF和VHF频率测量系统中应用的研究

单片机AT89C51在UHF和VHF频率测量系统中应用的研究 Study on an Application Using AT89c51 to Measure Frequency in UHF and VHF 黄继武 HUANG Ji wu 1 1 2 3 4 first-author 杨宏伟 YANG Hong wei 2 1 2 3 4 明锋 MING Feng 2 1 2 3 4 武汉大学电子信息学院 武汉大学电子信息学院 1 School of Electronic Information, Wuhan University 1 School of Electronic Information, Wuhan University 武汉众友科技公司研究所 武汉众友科技公司研究所 The Research Department of Wuhan Zhongyou Technology Corporation The Research Department of Wuhan Zhongyou Technology Corporation 武汉众友科技公司研究所,湖北,武汉,430072 武汉众友科技公司研究所,湖北,武汉,430072 ,湖北,武汉,430070 ,湖北,武汉,430070 根据频率测量的基本原理 ,采用外部事件中断而不是常规的定时中断的频率测量的工作方式 ,设计了特高频 UHF,甚高频 VHF频率测量的基本电路和软件流程 .通过整机测试 ,不仅满足测量精度要求 ,而且兼顾频率分辨率和信号灵敏度的指标 ,解决了单片机的运行频率较低和被测信号的频率极高的矛盾 A basic circuit and its software flow for UHF and VHF fequency measuring are designed in this paper.According to the basic theory of frequenay measuring,the method of frequeney is external\|event\|interrupt,not traditional timer\|interrupt.The system test indicated that they can satisfy not only the requirement of measuring accuracy,but also the specifications of frequency distingue rate and signal sensitivity,thus the conflict between the low runnirg frquency of the single chip computer and the high frequency of the measured signal is solved. 单片机AT89C51 特高频UHF 甚高频VHF 频率测量 误差分析 AT89C51 UHF VHF frequency measure error analysis TP368.1 国家自然科学基金资助 （ 6 95 710 2 1） 2002-01-01 2021-04-01 1