簡易數字頻率計的設計

測控論文編號:CK077   論文字數:10394,頁數:31

目  錄
摘  要 I
Abstract II
目  錄 III
1  前言 1
 1.1國內外研究現狀 1
 1.2 課題的意義 2
 1.2.1 課題的背景 2
 1.2.2 課題的意義 3
 1.3 課題的目的及目標 3
 1.3.1 課題的目的 3
 1.3.2 課題的目標 3
2  簡易數字頻率計的硬件設計 4
 2.1 系統硬件總敘述 4
 2.2 單片機介紹 4
 2.3 總電路圖各部分電路設計 8
 2.3.1 電源 10
 2.3.2 波形轉換電路 10
 2.3.3 計數電路 10
 2.3.4 顯示電路 11
 2.3.5 復位電路 13
 2.3.6 時鐘電路 .15
 3  簡易數字頻率計的軟件設計 17
3.1 Keil uVision2介紹 ..17
3.2 軟件流程 19
 3.3 脈沖信號計數模塊 20
 3.4 定時模塊 20
 3.5 頻率顯示模塊 20
4  結論 21
致謝 22
參考文獻 23
附錄 24

摘  要
 頻率測量是電子技術主要測試對象之一，它和現代通訊、廣播技術緊密相連，它們的頻段都有嚴格的限定，其頻率的建立也有相應的要求，否則要引起相互干擾。這就促進了頻率技術的發展。測量頻率的方法有多種，其中電子計數器測量頻率具有使用方便、測量迅速，以及便于實現測量過程自動化等優點，是頻率測量的重要手段之一。本文介紹了一種基于MCS-51單片機，采用模塊化布局的簡易數字頻率計的設計方法，在軟件設計上采用了單片機的C語言設計，系統軟件的設計簡單明了，在測量頻率時采用測頻和測周相結合的方法，提高了頻率計的測量精度。主要功能有：頻率測量和周期測量。整個設計可以分為三個部分：設計原理、硬件設計、軟件設計。本文詳細介紹了簡易數字頻率計的硬件設計和軟件設計。
關鍵詞：頻率；單片機；分頻；測量；顯示

Abstract
 Frequency measurement is one of main the testing object for electronic technology. It closely linked to modern communication and broadcasting technology, whose frequency brand have severe limit and the setting of frequency also has corresponding requirement, otherwise it will cause mutual interference. Therefore it speeds up the development of frequency technology. There are many methods to measure frequency and using electronic counter to measure frequency is one of the key methods to measure frequency, which has following advantages: use conveniently, measure rapidly and easy to realize process automation. The text introduces one design method of simple digital frequency meter, which bases on the MCS-51 single chip and adopts modular layout. It uses C language to design software, which is simple and easy to understand. In order to increase the precision of frequency meter, it adopts the combination of frequency measurement and cycle measurement. The main functions of the frequency meter are frequency measurement and cycle measurement. The whole design can divide into three parts: design principle, hardware design and software design. The text has particularly introduced the hardware design and software design of the frequency meter.

Key words: frequency; single chip; frequency division; measure; display