數(shù)字頻相測(cè)量系統(tǒng)設(shè)計(jì)

電子信息工程論文編號(hào):DZXX027  論文字?jǐn)?shù):9991,頁(yè)數(shù):34

目  錄
摘  要 3
ABSTRACT 4
第一章  引言 6
1.1  背景 6
1.2  研究?jī)?nèi)容 6
1.3  單片機(jī)硬件系統(tǒng)設(shè)計(jì)原則 7
第二章  AT89C51與TLP521介紹 8
2.1  AT89C51單片機(jī)簡(jiǎn)介 8
2.2  TLP521簡(jiǎn)介 11
2.3  74HC14N,6路施米特觸發(fā)反相器 12
第三章  數(shù)字頻相測(cè)量系統(tǒng)的硬件設(shè)計(jì) 13
3.1 硬件電路設(shè)計(jì)簡(jiǎn)介 13
3.2 整體系統(tǒng)框圖 13
3.3 正弦波整形電路 13
3.4 單片機(jī)檢測(cè)與處理電路 14
3.5 數(shù)碼管顯示電路的設(shè)計(jì) 16
第四章  數(shù)字頻相測(cè)量系統(tǒng)的軟件設(shè)計(jì) 18
4.1程序流程圖 18
4.2 程序代碼分析 20
4.3軟件系統(tǒng)調(diào)試 23
第五章 移相測(cè)試信號(hào)源設(shè)計(jì) 25
第六章 系統(tǒng)調(diào)試 26
第七章 結(jié)論 27
致謝 28
參考文獻(xiàn) 29
附錄1   硬件電路圖 30
附錄2   程序清單 31
附錄3   元器件清單 35
附錄4   實(shí)物圖 36

摘  要
 隨著數(shù)字電子技術(shù)的發(fā)展，由數(shù)字邏輯電路組成的控制系統(tǒng)逐漸成為現(xiàn)代檢測(cè)技術(shù)中的主流，數(shù)字測(cè)量系統(tǒng)也在工業(yè)中越來(lái)越受到人們的重視。在實(shí)際工作中，經(jīng)常會(huì)遇到需要檢測(cè)兩個(gè)信號(hào)的相位差，這也是研究網(wǎng)絡(luò)相頻特性中不可缺少的重要方面。數(shù)字式儀器采用數(shù)碼管顯示相位差，精確度高，穩(wěn)定性能好，讀數(shù)方便且不需要經(jīng)常調(diào)試。
 本設(shè)計(jì)通過(guò)把兩路同頻率正弦信號(hào)整形放大成方波，然后由AT89C51單片機(jī)對(duì)兩路方波的低電平進(jìn)行采樣，經(jīng)過(guò)算法設(shè)計(jì)實(shí)現(xiàn)這兩路信號(hào)的頻率及相位差計(jì)算，檢測(cè)范圍50Hz～2kHz，0o ～ 360 o，精度均可達(dá)2％。
 本課題硬件設(shè)計(jì)用Protel99 SE工具，軟件仿真用Keil c V3.60語(yǔ)言編程。系統(tǒng)經(jīng)調(diào)試，功能穩(wěn)定，均實(shí)現(xiàn)各項(xiàng)任務(wù)指標(biāo)。

關(guān)鍵詞：AT89C51；TLP521；脈沖整形；相位差

ABSTRACT
 With the development of digital electronic technology, digital logic circuit control system has gradually become the mainstream of modern detection technology. In industry , people is also taking more and more attention in digital measuring system. In the practice, we often encounter to detect two difference signals of phase. This research is important aspects in an indispensable phase frequency characteristics of network. Digital devices are with digital control phase, high precision, stable performance, easy reading and less regular debugging.
 First, two input signals with same frequency were amplified, then transformed two pulse signals. AT89C51 sampled them and calculated their frequency, phase difference. The detect range were from 50Hz~2kHz in frequency and 0o ～ 360 o in phase difference.
 The hardware of this topic was designed by Protel99 SE, and the hardware emulator was designed by base Keil c V3.60.When the system was debugged, it carried out all required precision.

Keywords:  AT89C51；TLP521；pulse shaping；phase difference