本文是基于單片機(jī)的調(diào)頻電力線(xiàn)載波機(jī)畢業(yè)設(shè)計(jì)，內(nèi)容如下：

摘要

電力線(xiàn)網(wǎng)絡(luò)的最大優(yōu)勢(shì)是它覆蓋的范圍非常廣，各種建筑物內(nèi)都有接入。與常見(jiàn)的Internet不同，電力線(xiàn)通信（Power-line communication）由于通信線(xiàn)路的特點(diǎn)，不是一種遠(yuǎn)距離的通信方式，它適合“最后一英里”（last mile）的通信接入。
本文首先簡(jiǎn)單介紹了低壓調(diào)頻電力線(xiàn)載波通信的發(fā)展歷程，特點(diǎn)以及它的分類(lèi)，應(yīng)用價(jià)值。然后根據(jù)導(dǎo)師所提出的設(shè)計(jì)要求，對(duì)設(shè)計(jì)中需求的衰減電路，L-C帶通濾波器，載波放大器以及二極管限幅電路等硬件電路模塊的原理或者規(guī)律進(jìn)行探索。對(duì)于設(shè)計(jì)中所選擇的LM567和LM386兩種芯片的使用要點(diǎn)做了簡(jiǎn)單介紹。
從研究方法上講，文章重點(diǎn)介紹了采用LM567鎖相環(huán)集成電路實(shí)現(xiàn)語(yǔ)音的頻率解調(diào)，設(shè)計(jì)了電路原理圖，并進(jìn)行了相關(guān)的參數(shù)計(jì)算，從理論上成功實(shí)現(xiàn)了調(diào)頻電力線(xiàn)載波機(jī)接收部分的設(shè)計(jì)。
從現(xiàn)實(shí)意義來(lái)講，隨著電力載波技術(shù)的不斷發(fā)展和社會(huì)的需求，低壓電力載波通信技術(shù)的開(kāi)發(fā)及應(yīng)用亦出現(xiàn)了方興未艾的局面。低壓電力線(xiàn)載波通信與其他通信方式相比，能充分利用現(xiàn)有的電力線(xiàn)資源，即利用每家每戶(hù)現(xiàn)有的低壓配電線(xiàn)（380V/220V）進(jìn)行通信，實(shí)現(xiàn)信息的傳輸。因而，低壓電力線(xiàn)載波通信具有很好的開(kāi)發(fā)前景和應(yīng)用價(jià)值。
關(guān)鍵詞：鑒頻；電力線(xiàn)載波機(jī)；LM567;雙工對(duì)講

Abstract

The greatest advantage of the power-line network is that it covers a very wide range.Various buildings have power lines access.Different from the common internet,the PLC (Power-line communication) is not a long-distance correspondence,but the “l(fā)ast mile”communication access.
In the article,it introduce simply the development course,feature,classification and application value of the Low Voltage PLC Communication at first.Then according to the demandant required by the teacher,it reserches the principle or discipline of dalping circuit,L-C band-pass filter,carrier amplifier and diode slicer circuit.The article also introduces the usage essential of the chips of LM567 and LM386.
Speaking on the research approach,the article mainly introduces the method which adopts LM567 phase-locked loop to achieve voice frequency demodulation.It also designes the elementary diagram of circuit,conducts to calculate the correlative parameter.Theoretically it implements the designment of the receivement of FM PLC.
Talking on the realistic meaning,as the growth of PLC technology and the demandant of society,the development and application of Low-Voltage PLC communication technology appears an unfolding situation.Compared to the other communication methods,Low-Voltage PLC communication would take full advantage of the existing power line source to communicate.The existing power line is the low voltage distribution line in every family.So it can achieve the information transmission.Generally speaking,Low-Voltage PLC communication owes very good development foreground and application worth.
Key words:frequency demodulation;power line carrier(PLC); LM567;duplex talkback


0　前言 1
1　電力線(xiàn)路及載波通訊發(fā)展 2
1.1　電力載波通信的發(fā)展及優(yōu)缺點(diǎn) 2
1.1.1　電力線(xiàn)載波的概念 2
1.1.2　電力線(xiàn)載波通信發(fā)展歷程 2
1.2　電力線(xiàn)載波通信原理 4
1.3　電力線(xiàn)載波存在的問(wèn)題 4
1.4　電力線(xiàn)載波機(jī)的新價(jià)值 5
2調(diào)頻信號(hào)的基本特性 7
2.1調(diào)頻信號(hào) 7
2.2調(diào)角信號(hào)的頻譜和帶寬 9
2.3貝塞爾函數(shù)零值法測(cè)頻偏 12
3　硬件電路系統(tǒng)各模塊介紹 14
3.1　二極管限幅電路的限幅規(guī)律 14
3.1.1　二極管串聯(lián)限幅電路 14
3.1.2　二極管并聯(lián)限幅電路 15
3.1.3　結(jié)　論 16
3.2　L-C選頻放大電路 16
3.2.1　L-C諧振回路的頻率特性 17
3.2.2　選頻放大電路 18
3.3　可變橋T型衰減器的設(shè)計(jì) 19
3.3.1　可變橋T型衰減器的原理及設(shè)計(jì) 20
3.3.2　可變衰減器的應(yīng)用 23
3.4　LM567鎖相環(huán)集成電路簡(jiǎn)介 24
3.4.1　LM567引腳及內(nèi)部框圖 24
3.4.2 　LM567的使用要點(diǎn) 26
4　調(diào)頻電力線(xiàn)載波機(jī)接收部分的設(shè)計(jì) 28
4.1設(shè)計(jì)要求 28
4.2 設(shè)計(jì)原理 28
4.3電路原理圖實(shí)現(xiàn)方案 29
4.3.1自適應(yīng)阻抗匹配系統(tǒng)模型 29
4.3.2接收部分的設(shè)計(jì) 31
4.4計(jì)算說(shuō)明 32
5結(jié)論與展望 36
致謝 37
參考文獻(xiàn) 38
附錄A 39
附錄B 51