光學三維測量機機械結(jié)構(gòu)及其控制系統(tǒng)設(shè)計

摘 要

逆向工程是當前用于產(chǎn)品開發(fā)和仿制加工的一種先進手段，是集測量技術(shù)、CAD技術(shù)、激光技術(shù)、材料技術(shù)和計算機控制技術(shù)等為一體的高新技術(shù)，它針對現(xiàn)有的工件（樣品或模型），利用3D數(shù)字化測量儀器快速、準確的測得大量輪廓坐標點，并對這些坐標點進行去噪，匹配加以構(gòu)建，修改后輸入到CAD/CAM系統(tǒng)，生成NC的刀具加工路徑，或輸入CNC進行生成所需的模具，或者生成某種格式的文件輸入到快速成形機將樣品模型制造出來。三維光學測量機就是這樣一種設(shè)備，它可以將在三維物理空間中的被測物體復制到三維數(shù)據(jù)空間當中并進行重現(xiàn)，我們稱之為建立三維模型。這種能力使三維掃描儀擁有非常巨大的應(yīng)用前景。由于逆向工程技術(shù)具有廣泛的應(yīng)用領(lǐng)域和實用價值，因此，世界上主要工業(yè)國家紛紛投入巨資對此項技術(shù)進行研發(fā)和推廣應(yīng)用，他們無不站在21世紀世界制造業(yè)全球競爭的戰(zhàn)略高度來對待這一技術(shù)。目前該項技術(shù)已經(jīng)廣泛應(yīng)用于機械零部件的快速開發(fā)、汽車和飛機覆蓋件的快速檢測和反求、快速模具、醫(yī)療及康復工程、家用電器、工業(yè)設(shè)計、工藝品制作以及兒童玩具等領(lǐng)域，取得了巨大的經(jīng)濟效益。本次設(shè)計主要是完成光學三維測量機機械部分和控制系統(tǒng)的設(shè)計，本文提出的結(jié)構(gòu)光三維測量系統(tǒng)是一種光柵式結(jié)構(gòu)光掃描雙目視覺測量技術(shù)。由于是面掃描，所以，在速度上有很大的優(yōu)勢，可以很好的實現(xiàn)被測自由曲面的快速、高精度的三維尺寸測量。通過對測量機的個部分部件的設(shè)計，最后完成光學三維測量機的設(shè)計工作。

關(guān)鍵詞　逆向工程   三維模型    光學三維測量機  光柵  掃描

Abstract
Reverse engineering is currently used for product development and imitation of an advanced means of processing, is set measurement technology, CAD technology, laser technology, materials technology and computer-controlled technology, which integrates high-tech, it addresses the existing part (or sample MODEL), using 3 D digital measuring instruments quickly and accurately measured the outline of a large number coordinates, and coordinates of these points denoising, match to build, the revised import to CAD / CAM system, generating the NC tool processing path, or enter CNC to generate the necessary die, or generate a certain format of the files into a rapid prototyping machine will be created by the sample model. Three-dimensional optical measuring machine is one such device, which can be three-dimensional physical space of the detected objects copied to the 3D data space and return them, we call it the establishment of three-dimensional model. This ability to 3-D scanner has a very great prospect. Since reverse engineering is a wide range of applications and practical value, the world's major industrial countries have invested heavily in research and development of the technology and application, they all stand in the 21st century global competition in world manufacturing strategy to deal with this highly A technology. Currently the technology has been widely used in the rapid development of machinery parts, automobile and aircraft coverage of the rapid detection and anti-seeking, rapid tooling, medical and rehabilitation engineering, home appliances, industrial design, craft making and children's toys, and other fields and achieved A huge economic benefits. The optical design is complete three-dimensional measuring machines and mechanical control system design, the paper's three-dimensional structure of optical measurement system is a grating structure of binocular vision measuring optical scanning technology. Since the scan, therefore, have great speed on the edge, you can achieve very good surface tested free of the fast, high-precision 3D measurement. By measuring machine parts parts of the design, the final completion of three-dimensional optical measuring machine design.
Key words　 Reverse engineering   Three-dimensional model of optical scanning Three-dimensional measuring machines Grating

目 錄
摘要 I
ABSTRACT II

第一章 緒論 1
引言 1
1.1 三維光學測量機的應(yīng)用與發(fā)展狀況 2
1.2 設(shè)計研究的目的和意義 3
1.3 本文的內(nèi)容安排 4
1.4 本章總結(jié) 4
第二章 光學三維測量機的測量原理 5
2.1 測量機的測量原理 5
2.2 三維測量機的特點 5
2.3 控制系統(tǒng)原理介紹 6
2.4 本章總結(jié) 7
第三章 光學三維測量機整體設(shè)計方案 18
3.1 設(shè)計要求 8
3.2 光學三維測量機基本結(jié)構(gòu)分析 8
3.2.1 設(shè)計任務(wù)和內(nèi)容 8
3.2.2 總體設(shè)計法案的擬定 8
3.2.3 光學三維測量機機械部分設(shè)計 9
3.2.4 控制部分設(shè)計 10
3.3 主要參數(shù)設(shè)定 16
3.4 本章總結(jié) 16
第四章 機械部分的具體設(shè)計及其硬件選擇 17
4.1底座設(shè)計 17
4.2 滑動體主要設(shè)計 18
4.3 光學掃描儀測量系統(tǒng)的硬件組成 18
4.3.1結(jié)構(gòu)光三維測量系統(tǒng)的硬件組成 18
4.3.2 CCD基本知識 19
4.3.3圖像采集卡 20
4.3.4選擇結(jié)果 20
4.4 光柵電動平移臺基本結(jié)構(gòu)設(shè)計 21
4.5 本章總結(jié) 21
第五章 光學三維測量機的設(shè)計計算 22
5.1 控制系統(tǒng)中電機的選擇 22
5.1.1 步進電機概述 22
5.1.2 電動機容量的選擇原則 22
5.1.3 步進電動機的容量計算 23
5.2 聯(lián)軸器的選擇 23
5.3 絲杠螺母副的選用計算 24
5.3.1絲杠螺母導程的確定 24
5.3.2 確定絲杠的等效轉(zhuǎn)速 24
5.3.3 絲杠的等效負載 24
5.3.4 確定絲杠所受的最大動載荷 24
5.3.5 計算軸承動載荷 25
5.3.6 絲杠拉壓振動和扭轉(zhuǎn)振動的固有頻率計算 25
5.4 絲杠的扭轉(zhuǎn)剛度 26
5.5傳動精度計算 26
5.6 本章總結(jié) 27
第六章 總結(jié)和展望 28
6.1 全文總結(jié) 28
6.2 展望 28
致  謝 30
參考文獻 31
附錄1  33
附錄2  48