【正文】 識到本聲明的法律后果由本人承擔(dān)。 作 者 簽 名： 日 期： 指導(dǎo)教師簽名： 日 期： 使用授權(quán)說明 本人完全了解 大學(xué)關(guān)于收集、保存、使用畢業(yè)設(shè)計（論文）的規(guī)定，即：按照學(xué)校要求提交畢業(yè)設(shè)計（論文）的印刷本和電子版本；學(xué)校有權(quán)保存畢業(yè)設(shè)計（論文）的印刷本和電子版，并提供目錄檢索與閱覽服務(wù)；學(xué)校可以采用影印、縮印、數(shù)字化或其它復(fù)制手段保存論文；在不以贏利為目的前提下，學(xué)校可以公布論文的部分或全部內(nèi)容。 本科生畢業(yè)設(shè)計（論文） 論 文 題 目：基于單片機(jī) 基于單片機(jī)的胎壓監(jiān)測系統(tǒng)設(shè)計 I I 畢業(yè)設(shè)計（論文）原創(chuàng)性聲明和使用授權(quán)說明 原創(chuàng)性聲明 本人鄭重承諾：所呈交的畢業(yè)設(shè)計（論文），是我個人在指導(dǎo)教師的指導(dǎo)下進(jìn)行的研究工作及取得的成果。 作者簽名： 日 期： I II 學(xué)位論文原創(chuàng)性聲明 本人鄭重聲明：所呈交的論文是本人在導(dǎo)師的指導(dǎo)下獨立進(jìn)行研究所取得的研究成果。 作者簽名： 日期： 年 月 日 學(xué)位論文版權(quán)使用授權(quán)書 本學(xué)位論文作者完全了解學(xué)校有關(guān)保留、使用學(xué)位論文的規(guī)定，同意學(xué)校保留并向國家有關(guān)部門或機(jī)構(gòu)送交論文的復(fù)印件和電 子版，允許論文被查閱和借閱。 ：任務(wù)書、開題報告、外文譯文、譯文原文（復(fù)印件）。 據(jù)汽車工程師學(xué)會統(tǒng)計 ,美國每年由于輪胎 欠壓以及 滲 漏造成的有 26 萬左右 起交通事故。 因為直接測量方法可靠方便，所以在本文中我選用了這種方法。最后，為了提供穩(wěn)定的電源用于給系統(tǒng)供電，我選用了 ABLE（愛博爾）公司的 ER2450。 關(guān)鍵詞 : 汽車胎壓 監(jiān)測 SP12 NRF24L01 V Abstract With the development of science technology and economics, car has been important vehicle that people can not been without. However, the increasement of the amount of cars leads to more and more traffic accidents happened. In these, the pressure of tyre is key factor. According to SAE (society of automotive engineers), about 260,000 accidents is caused by the lack of pressure of tyre. And in china, about 70% accidents are caused by tyre burst. So, preventing tyre burst has been an important issue. As far, TPMS is divided into two kinds—directly and indirectly. In this paper, I select the first one for its convenience. In addition, pare of three kinds of sensors is made. At last, SP12 is chosen. As a kind of sensor used specially in car, SP12 has a good character. To lower the power consumption, I choose the mode of awakening by low frequency. MC33690 is used to transfer a signal with a low frequency. And this signal is received by a LC circuit. To support a steady power, ER2450 was used, which is made by ABLE pany. The most of information is transferred in the mode of wireless. NRF24L01 is used to transfer pressure. And which tyre can be located because the frequency of transferring in every tyre is different. The range of working is from 100KPa to 400KPa. The precision is . VI Key words: tyre pressure monitoring SP12 NRF24L0 VII 目 錄 摘要 ..........................................................................................................I ABSTRACT ........................................................................................... V 1 緒論 ...................................................................................................... 1 課題產(chǎn)生背景及其意義 ...................................................................................... 1 國內(nèi)外發(fā)展?fàn)顩r .................................................................................................. 1 擬采取的研究方法及選用技術(shù) .......................................................................... 2 本論文的內(nèi)容簡介 .............................................................................................. 3 2 TPMS 分類及原理介紹 ....................................................................... 4 間接式 ................................................................................................................. 4 計算式間接 ................................................................................................... 4 磁敏式間接 ................................................................................................... 4 基于 SAW 方式 ............................................................................................ 5 直接式 .................................................................................................................. 5 3 系統(tǒng)的總體設(shè)計 ................................................................................. 7 系統(tǒng)的需求分析 .................................................................................................. 7 工作環(huán)境 ....................................................................................................... 7 技術(shù)分析 ....................................................................................................... 7 汽車輪胎爆胎原因分析 ............................................................................... 7 系統(tǒng)的總體設(shè)計 ................................................................................................. 8 總體設(shè)計 ........................................................................................................ 8 檢測模塊設(shè)計 ................................................................................................ 9 主機(jī)部分設(shè)計 ................................................................................................ 9 4 元器件介紹 ....................................................................................... 10 VIII 傳感器 ............................................................................................................... 10 英飛凌的 SP12， SP12T,SP30 .................................................................... 10 飛思卡爾的 MPXY8300 系列 .................................................................... 11 GE 的 NPX 系列 ......................................................................................... 12 三種傳感器比較 .......................................................................................... 12 MCU ................................................................................................................... 13 RF 射頻收發(fā)芯片 .............................................................................................. 13 模塊簡介： .................................................................................................. 13 模塊電氣特性 .............................................................................................. 14 模塊引腳說明 ............................................