基于單片機(jī)的數(shù)字頻率計(jì)的設(shè)計(jì)

電子機(jī)電論文編號(hào):JD821  論文字?jǐn)?shù):7553,頁(yè)數(shù):23

基于單片機(jī)的數(shù)字頻率計(jì)的設(shè)計(jì)
目錄
摘 要 I
Abstract I
1引言 1
2 頻率計(jì)設(shè)計(jì)原理及方案 1
3 系統(tǒng)部件簡(jiǎn)介 2
3.1 AT89C51單片機(jī)及其引腳說明 2
3.2 ZLG7290功能簡(jiǎn)介 3
4 頻率計(jì)的硬件設(shè)計(jì) 4
5 單元程序的設(shè)計(jì) 5
5.1 1s定時(shí) 5
5.2 T1計(jì)數(shù)程序 6
5.3 頻率數(shù)據(jù)采集 8
5.4 進(jìn)制轉(zhuǎn)換 8
5.5 數(shù)碼顯示 11
6 程序的調(diào)試 14
7 結(jié)論 15
參考文獻(xiàn) 15
謝    辭 16
附錄：頻率計(jì)系統(tǒng)總體程序 17

摘 要: 隨著電子信息產(chǎn)業(yè)的不斷發(fā)展，信號(hào)頻率的測(cè)量在科技研究和實(shí)際應(yīng)用中的作用日益重要。在電子技術(shù)中，頻率是最基本的參數(shù)之一，又與許多電參量的測(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)量過程自動(dòng)化等優(yōu)點(diǎn)，是頻率測(cè)量的重要手段之一。在本次畢業(yè)設(shè)計(jì)中選擇使用單片機(jī)來制作數(shù)字頻率計(jì)，并在實(shí)際制作中采用了直接測(cè)頻法。利用延時(shí)產(chǎn)生的時(shí)基門控信號(hào)來控制閘門，通過在單位時(shí)間內(nèi)計(jì)數(shù)器記錄下的脈沖個(gè)數(shù)計(jì)算出輸入信號(hào)的頻率，最終送入LED中顯示。這樣制作出來的頻率計(jì)不僅可以滿足設(shè)計(jì)題目的參數(shù)要求，而且具有了單片機(jī)的穩(wěn)定性和成熟性，且控制能力強(qiáng)，是一種低成本，高可靠的設(shè)計(jì)方案。
關(guān)鍵字：?jiǎn)纹瑱C(jī)；頻率計(jì)；測(cè)量

The Design of The Cymometer Based on The Microcontroller
Abstract: With the unceasing development of electronic information industry, the measurement of the signal frequency is playing a significant role in theory study and pratical application.In the subject of electronic technology, frequency, which has great connection with the measurement plan and result of electronic parameter, is one of the most basic parameters. Therefore, the measurement of frequency shows great importance. Among thousands of ways to measure frequency, electronic counter is taken as one of the best because of high precision, low time-cost, convenience, and automatic process. In this paper, we choose single chip microcomputer to make a digital frequency counter; meanwhile, direct measurement is taken in practice. Use the time-based gating singal created by time-delay to control the strobe. Compute the frequency with the help of the number of pulses recorded by the counter in specific time, then screen the result on the LCD. In this way, not only can my design reach the goal of my graduation thesis, but also it has stability and maturity.
Key Words: Micro- computer；Frequency；Measure