電子信息工程論文編號(hào):DZXX002  論文字?jǐn)?shù):11728,頁(yè)數(shù):25

目錄
超聲波測(cè)距模塊的設(shè)計(jì) 1
第一章 緒論 3
1.1 課題背景及重要意義 3
1.2 課題研究的歷史與現(xiàn)狀 4
第二章 超聲波測(cè)距的基本原理 5
2.1 超聲波的介紹 5
2.2 超聲波的產(chǎn)生 5
2.3 超聲波測(cè)距的原理 6
第三章 方案論證 8
3.1 超聲波傳感器的選擇 8
3.2 超聲波發(fā)波方式的選擇 8
3.2.3 結(jié)論 9
第四章 系統(tǒng)硬件電路設(shè)計(jì) 10
4.1 系統(tǒng)硬件框圖 10
4.2 主控制器PIC16F73簡(jiǎn)介 10
4.3 超聲波發(fā)波電路 11
4.4 超聲波接收電路 11
4.5 數(shù)據(jù)傳輸 13
第五章 系統(tǒng)軟件設(shè)計(jì) 15
5.1 MPLAB IDE集成開發(fā)環(huán)境 15
5.2 系統(tǒng)軟件框架 15
5.3 長(zhǎng)、短距離測(cè)量模式的自動(dòng)調(diào)整 16
5.4 I2C數(shù)據(jù)傳輸?shù)脑O(shè)置和實(shí)現(xiàn) 17
第六章 實(shí)驗(yàn)結(jié)果 22
6.1 D/A數(shù)據(jù)傳輸 22
6.2 I2C數(shù)據(jù)傳輸 22
第七章 總結(jié) 23
致謝 24

摘要:超聲波作為一種傳輸信息的媒體，由于其本身的直射性和反射性，以及不易受光照、電磁波等外界因素影響的特性，在探傷、測(cè)距、測(cè)速等多種領(lǐng)域越來(lái)越受到重視。
 在測(cè)距領(lǐng)域，傳統(tǒng)的測(cè)距方法都是用一種帶有標(biāo)準(zhǔn)刻度的測(cè)量工具進(jìn)行有接觸的測(cè)量，這種測(cè)量方法雖然被廣泛的應(yīng)用在生活中，但在有些場(chǎng)合卻無(wú)法完成測(cè)距的任務(wù)，如在井深，液位，管道長(zhǎng)度的測(cè)量。而且這種方法在數(shù)據(jù)的讀取和保存都需依靠人工的方法，對(duì)數(shù)據(jù)的后期處理也相對(duì)麻煩。為了克服傳統(tǒng)測(cè)距方法在上述場(chǎng)合的不適用，在電子產(chǎn)品發(fā)展中，新興出一種新的測(cè)距方法－非接觸測(cè)距。
 本文介紹了一種以PIC16F73為核心控制器的超聲波測(cè)距模塊的設(shè)計(jì)。論文首先介紹了超聲波測(cè)距的基本原理，隨后對(duì)幾種可性的方案進(jìn)行了方案論證，確定最后的設(shè)計(jì)方案，并對(duì)整個(gè)的設(shè)計(jì)方案作了詳細(xì)的介紹。
關(guān)鍵詞： 超聲波；測(cè)距；非接觸式；PIC單片機(jī)
Abstract:Ultrasonic is a kind of media that transmits information, It has many speciality,for example pounded and reflection, and not easy to be disturbed by the factors such as light, Hertzian waves. because of these unique advantages, ultrasonic get more and more attention of people on many areas,such as crack detection, range finding and speed trial.
 In the area of range finding,the traditional methods are used a measurement tools with calibration standard and contact to the object to measure. Although this method has been widely used in life, but in some occasions, it could not complete range of tasks, such as the range finding of well depth, Level, and the measuring the length of the pipeline.And use this method of reading, the data getting and preservation rely on artificial methods,the data handling in late is also relatively trouble. To overcome the traditional methods ranging occasions in the above does not apply, with the development of electronic products, a new range finding  methods-ranging non-contact is emerging.
 This paper presents a Ultrasonic Ranging Module design which use PIC16F73 to the core controller. Papers first introduced the Ultrasonic Ranging basic principles , be followed demonstrate several of the plan, and determine the final design, finally describe entire design in detail.

Keyword： ultrasonic； range finding；non-contact；PICsinglechip