手持式激光测距仪的设计(机械CAD图纸).doc

本科机械毕业设计论文CAD图纸QQ401339828本科机械毕业设计论文CAD图纸QQ401339828目录TOC\o"1-2"\t"A摘要,1,A一级标题,2,A二级标题,3"摘要PAGEREF_Toc324505221\h1关键词PAGEREF_Toc324505222\h11前言PAGEREF_Toc324505223\h11.1激光测距研究及发展现状PAGEREF_Toc324505224\h21.2课题的研究目的和意义PAGEREF_Toc324505225\h31.3课题研究的内容PAGEREF_Toc324505226\h62相位式激光测距技术研究PAGEREF_Toc324505227\h62.1相位式激光测距技术原理PAGEREF_Toc324505228\h62.2相位式激光测距多测尺原理PAGEREF_Toc324505229\h82.3差频测相原理PAGEREF_Toc324505230\h92.4自动增益控制原理PAGEREF_Toc324505231\h102.5光电探测器PAGEREF_Toc324505232\h123相位式激光测距仪控制电路的设计PAGEREF_Toc324505233\h163.1相位式激光测距仪的整体设计PAGEREF_Toc324505234\h173.2光电检测器的选择PAGEREF_Toc324505235\h183.3APD高压偏置电路的设计PAGEREF_Toc324505236\h193.4温度补偿电路PAGEREF_Toc324505237\h223.5自动增益控制电路AGCPAGEREF_Toc324505238\h263.6混频电路PAGEREF_Toc324505239\h314相位式激光测距仪软件系统设计PAGEREF_Toc324505240\h335仿真结果及分析PAGEREF_Toc324505241\h345.1APD高压偏置电路的仿真结果及分析PAGEREF_Toc324505242\h345.2自动增益控制电路的仿真结果及分析PAGEREF_Toc324505243\h386结论PAGEREF_Toc324505244\h41参考文献PAGEREF_Toc324505245\h41致谢PAGEREF_Toc324505246\h42附录PAGEREF_Toc324505247\h43手持式激光测距仪的设计摘要:本文首先介绍了相位式激光测距仪的研究背景、意义，总结和概括了激光测距的有关理论基础，并且介绍了相位式激光测距仪的测距原理，提出了测距系统的实现框图；接着围绕接收系统的性能开展深入研究，主要研究探测器件的选择，偏压电路、混频电路、自动增益控制电路的设计等问题；利用Proteus技术对APD偏压电路和自动增益控制电路进行仿真，通过仿真结果不断完善设计，并对这一设计进行研究、发展和创新，使得测距系统的测量精度得到了很好的保证及提高，降低了硬件成本，简化了控制电路。关键词:激光测距；雪崩二极管；相位；混频；自动增益控制DesignofHand-heldTypeLaserRangefinderAbstract:Thispaperstartedfromthebackground,thepurposes,meaningsofphase-shiftlaserranging,thensummarizedtherelatedtheoreticalbasisofit.Theprincipleofphaselaserrangingandapracticalrangingsystemisdiscussed.Thispaperconcentrateontheresearhofimprovingtheporpertyofreceivingsystem.Lotsofresearchhavedoneonchoosingdetectionelement，designofthebiascircuitandautomaticgaincontrolcircuit.Then，theproteusisusedforsimulationofthem.Withthehelpofthesimulation,thedesignwasimproved,andwiththeresearch,developmentandinnovationofthetechnology,wehaveensuredanddevelopedthemeasurementaccuracyoftherangingsyste