基于51單片機(jī)數(shù)字頻率計(jì)的設(shè)計(jì)(已修改)
2025-07-10 00:47 本頁(yè)面
【正文】 I摘 要 在電子技術(shù)中，頻率是最基本的參數(shù)之一，并且與許多電參量的測(cè)量方案、測(cè)量結(jié)果都有十分密切的關(guān)系，因此頻率的測(cè)量就顯得更為重要。測(cè)量頻率的方法有多種,其中電子計(jì)數(shù)器測(cè)量頻率具有精度高、使用方便、測(cè)量迅速，以及便于實(shí)現(xiàn)測(cè)量過(guò)程自動(dòng)化等優(yōu)點(diǎn)，是頻率測(cè)量的重要手段之一。電子計(jì)數(shù)器測(cè)頻有兩種方式：一是直接測(cè)頻法，即在一定閘門時(shí)間內(nèi)測(cè)量被測(cè)信號(hào)的脈沖個(gè)數(shù)；二是間接測(cè)頻法，如周期測(cè)頻法。直接測(cè)頻法適用于高頻信號(hào)的頻率測(cè)量，間接測(cè)頻法適用于低頻信號(hào)的頻率測(cè)量。本文闡述了基于通用集成電路設(shè)計(jì)了一個(gè)簡(jiǎn)單的數(shù)字頻率計(jì)的過(guò)程。關(guān)鍵詞：頻率，信號(hào)，周期AbstractIn electronic technology,the frequency is the most basic one of the parameters,andwith a number of electrical parameters of the measurement program,measurement more important,There are several ways of mesuring frequency,in which electronic counter the frequency with high precision,easy to use ,quick measurements,and is easy to realize the advatages of automaion of measurement process is an important means of frequency Counter Frequency Measurement There are two ways:First,the directfrequency measurement method,thatis,the gate in a certain period of time measured the number of measured signal pulse。2is indirect frequency measurement method,such as cycle frequency measurement frequency measurement method for highfrequency signals offrequency measurement,indirect frequency measurement method for lowfrequency signald of frequency this paper,based on a mom integrated circuit design of a simple digital frequency meter process. Key words:frequency,signal,period II目 錄摘要 .......................................................Ⅰ一、引言（一）數(shù)字頻率計(jì)概述..........................................1（二）問(wèn)題提出................................................1（三）設(shè)計(jì)思想................................................1二、方案論證與比較（一）方案選擇................................................2總體方案比較...............................................2測(cè)頻方案比較...............................................2（二）測(cè)頻原理................................................2三、數(shù)字頻率計(jì)設(shè)計(jì)（一）數(shù)字頻率計(jì)原理..........................................4數(shù)字頻率計(jì)的基本組成.......................................4數(shù)字頻率計(jì)的主要技術(shù)指標(biāo)...................................5（二）數(shù)字頻率計(jì)的設(shè)計(jì)........................................5硬件電路設(shè)計(jì)...............................................5軟件的設(shè)計(jì).................................................7軟件仿真...................................................9四、基本元器件的闡述（一）AT89S52 簡(jiǎn)介 ............................................9主要功能特性..............................................10引腳功能..................................................11III（二）555 定時(shí)器 .............................................11555 定時(shí)器及其應(yīng)用 ........................................11施密特觸發(fā)器..............................................12五、結(jié)束語(yǔ)（一）總結(jié)...................................................13致謝 .......................................................14參考文獻(xiàn) ..................................................15附錄 ........................
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