基于單片機的數(shù)字式頻率計軟件設(shè)計

電氣工程論文編號:DQ199   論文字?jǐn)?shù):12659,頁數(shù):43

目 錄

摘要 Ⅰ
1 前言 1
1.1 數(shù)字頻率計研究的意義與目的 1
1.2 數(shù)字頻率計的現(xiàn)狀和發(fā)展前景 1
1.3 數(shù)字頻率計設(shè)計的工作內(nèi)容 3
2主要硬件簡介 4
2.1 AT89S51單片機 4
2.2 觸發(fā)器 6
2.3 譯碼器 6
3數(shù)字頻率計硬件設(shè)計 9
3.1 頻率計的工作原理 9
3.2頻率計的系統(tǒng)級框圖 9
3.3數(shù)字頻率計硬件設(shè)計原理 9
3.3.1輸入單元 10
3.3.2 顯示單元 10
3.3.3 引腳圖 11
3.3.4 功能表 11
3.4 系統(tǒng)總設(shè)計 12
4 數(shù)字頻率計軟件系統(tǒng)設(shè)計 14
4.1系統(tǒng)軟件的設(shè)計的基本原理 14
4.1.1 系統(tǒng)軟件的設(shè)計的總原理及總框圖 14
4.1.2定時循環(huán)的程序設(shè)計框圖 15
4.1.3 進制轉(zhuǎn)換 17
4.1.4 數(shù)碼顯示 19
4.1.5頻率計系統(tǒng)總體程序 25
4.２ 程序的調(diào)試 25
4.３　單片機仿真器簡介 27
5總結(jié) 28
致謝 29
參考文獻 30
附錄 系統(tǒng)總程序 31

摘 要
 
 數(shù)字頻率計是計算機、通訊設(shè)備、音頻視頻等科研生產(chǎn)領(lǐng)域不可缺少的測量儀器，其基本功能是測量正弦信號、方波信號及其他各種周期信號的頻率及周期參數(shù)，并采用十進制數(shù)字顯示被測量參數(shù)，具有測量迅速、精度較高、顯示直觀等優(yōu)點。本文基于單片微處理器及其外圍電路，設(shè)計制作一個頻率測量系統(tǒng)，主要研究程序設(shè)計實現(xiàn)方法。設(shè)計思想采用定時、計數(shù)的方法實現(xiàn)對周期信號的頻率測量，然后通過進制轉(zhuǎn)換并運用LED顯示器動態(tài)顯示４位頻率參數(shù)，其測量范圍為1Hz-10kHz。程序采用匯編語言，主要通過偉褔編譯器編寫。實際運行表明，所設(shè)計的系統(tǒng)運行正常，結(jié)果正確。同時，通過對輸入信號的波形整形可實現(xiàn)對各種周期性變化信號的頻率及周期參數(shù)測量，若配以適當(dāng)?shù)膫鞲衅�，本系統(tǒng)也可實現(xiàn)多種非電量周期信號參數(shù)的測量，如機械振動的頻率，轉(zhuǎn)速，聲音的頻率等。
 
關(guān)鍵詞： 數(shù)字頻率計系統(tǒng)，單片機系統(tǒng)，系統(tǒng)設(shè)計，軟件設(shè)計

Abstract

The digital frequency meter is essential metering equipment in the production field of computer, communication equipment, audio frequency and video frequency, its basic function is measure sinusoidal signal, the square-wave signal and any other periodic signal frequency and the cyclical parameter. The digital frequency meter demonstrate the measured parameter by decimal, so it has many advantages like rapidly measure、high precision and Visual display.Now we based on the single-chip microprocessor and some peripheral circuit to design and produce a frequency measurement system, and mainly research the part of programmer. The main design idear is used by timing and counting to realize the measurement of periodic signal 's frequency, and then through the M-ary conversion and use of the LED display to dynamicly display four frequency parameters, and the measurement range is 1Hz-10kHz.The programme use of assembly language, and mainly used by preparation of the compiler-wei Fu. Practical operation show that the designed system is running normally,and the results is correct. In the orthe side, it can measure the frequency and cycle parameters of a variety of cyclical changes signall through shaping the input signa's waveform, if accompanied a appropriate sensors, the system can also measure various non-periodic signal parameters, such as mechanical vibration frequency, speed and sound frequency.

Key words：Digital frequency meter system，Single-chip microcomputer system，System Design，Software Design