摘要
随着汽车工业的发展,现有的汽车发动机箱体轴孔内径测量技术难以满足日益增长的测量要求。在现代测量中,光电检测技术由于其优越性得到了广泛的应用。本文分析了国内外的光电微位移检测技术发作状况,自行设计了微型精密光学测头,采用光电检测技术实现对小型轴孔的内径测量。
本文根据测量要求设计了一个机械测棒,机械测棒均布四个单独的光学测头,相邻两个测头位置相互垂直,相对两个测头位置在同一直线上。四个单独测头分别测单个径向位移,相对的两个测头就测得直径,四个测头可测得两组直径数据,多次测量后,作平均处理。单独测头应用激光三角法原理,使用PSD作为位移传感器,测量时,安装在测头上的光纤准直器准直发射出一束激光,激光打到被测物表面上发生漫发射,安装在测头上的接收物镜会聚部分漫反射光并将这部分光传至PSD感光面,PSD根据入射光重心位置产生两路电流信号,通过测量这两路电流信号就可以通过计算得到被测物的位移量。
本文研究的具体内容有:
1.分析了国内外光电检测技术的发展状况,阐述了本文采用的测量原理即激光三角法的原理及应用该原理测量时遵循Scheimpflug条件的必要性。
2.比较光学位移传感器CCD和PSD的优缺点,选择PSD作为本文的光学位移传感器,研究了PSD传感器的使用特性,及这些特性对整个测头测量系统的影响,根据PSD特性选择光源。
3.根据测量要求,对测头的机械结构和光学结构进行了设计,设计的机械结构紧凑、精密,有着严格的几何要求和尺寸配合关系。
4.根据测头机械结构进行传感器的处理电路板的设计,设计信号处理电路,实现传感器信号的提取、I/V转换、放大、A/D转换、存储、传输等功能。
5.设计标定实验方法,标定单独测头和测棒;进行总体误差分析,提出减小误差方法。
With the car industry development, the existing technology used in measuring car engine box bores hole could not meet the growing measure requirement. In modern measurement system, photoelectric detection technology is widely used for its superiority. However, owing to the structural dimension construction, this method could not be used in small space. This article analyzed the photoelectric micrometric displacement detection technology and self-designed mini measuring head to realize mini-hole size measurement.
According to the measurement requirement, this paper designs a mechanical bar with four separated head uniform distributed on it. Every two interfacing heads are orthogonal and every two opposite heads are co-liner. Each head detects one radial 7displacement, so that two heads can get a diameter and four heads can get two groups of data. Then, get average value by multiple detections. A single detection head take laser triangulation as principle and PSD as displacement sensor. When detecting, a laser sent by fiber-optical collimation fixed in the head takes place diffuse reflection when it get to the object surface. The mirror fixed in the head will collect a part of the diffuse reflection laser and send it to PSD. PSD will generate two electric currents according to the focus position of incident light. So we can get the displacement by calculating the value of the two electric currents.
The main content of this article includes:
1.Analyze the development situation of photoelectric detection in home and outdoor, elaborate triangulation principle and the necessary of following the condition of Scheimpflug when applying this principle.
2.Compare optical displacement sensor PSD and CCD merits and drawbacks, choose PSD as the optical displacement sensor in this article. Research the application characteristic of PSD sensor and the affection caused by the whole detection system. Choose light source according to PSD characteristic.
3.Design the mechanical and optical structure according to the detection requirement to make the structure compact and precise and possess strict geometry demand and dimensional coordination relationship.
4.Design the sensor circuit board according to the mechanical structure to deal with signals and realize functions such as signal extract, I/V conversion, magnification, A/D conversion, storage and transmission.
5.Design calibration experiments to calibrate solo detection head and bar. Analyze the detection mistake in whole and advance a way to diminish it.
引文
[1]庞亚萍,位置敏感探测器的发展状况及应用研究,科技情报开发与经济,2006,16(24),183~184
[2]蔡明知,宋洪侠,曹铁泽.基于PSD的高精度激光位移传感器设计与分析,机电产品开发与创新,2007,20(5):150~152
[3]杨崇波,付强.内径尺寸光电位移检测系统设计.长春工程学院学报,2008,9(1),73~76
[4]梁风超,续志军,胡军等,基于PSD的微位移传感器,传感器与微系统,2007,2(63),59~61
[5]赵天宇,吴易明,陈良益等,对综合应用PSD、CCD的双三角探头的研究,2007,7(21),5679-5680
[6]袁峰,基于PSD传感器的多目标平面运动状态测量系统设计:[硕士学位论文],南京;南京理工大学,2003
[7]周力萍,曹益平.基于PSD的小型激光测头的设计,工具技术,2006,40(9):70~72
[8]强锡富,传感器,北京:机械工业出版社,2001,172~177
[9]孙长库,叶声华,激光测量技术,天津:天津大学出版社,2001.7
[10]柴艳波,细长小孔孔径精密测量系统的设计及精度分析:[硕士学位论文],西安;西北工业大学,2007
[11]付强,内径尺寸光电位移检测系统研究:[硕士学位论文],长春;长春理工大学,2007
[12]张连存,张亚婷,张国玉,一种内径尺寸光电非接触测量方法,电子科技大学学报,2006,35(5):830~832
[12]黄战华,蔡怀宇,三角法激光测量系统的误差分析及消除方法,光电工程,2002,29(3):58~61
[13]郁道银,谈恒英,工程光学,北京:机械工业出版社,2006.1
[14]施文康,余晓芬,检测技术,北京:机械工业出版社,2000.5
[15]L.S. Wang,D.L.Lee,M.Y.Nie,Z.W.Zheng. A Study of the Precision Factors of Large-Scale Object Surface Profile Laser Scanning Measurement.Journal of Matericals Processing Technology,2002(129):584~587
[16]刘迈,冀志江,张进福,三角法位移传感器测头设计研究,实用测试技术
[17]罗志超,弹体几何尺寸数字化测量系统的研究:[硕士学位论文],长沙;国防科学技术大学,2005
[18]魏振忠,张广军,徐园,一种线结构光视觉传感器标定方法,机械工程学报,2005,41(2):210~212
[19]卢荣胜,孙长库,叶声华等.无缝钢管直线度视觉准直在线实时测量系统,天津大学学报,2000,33(1):38~40
[20]庞振基,黄其圣,精密机械设计,北京:机械工业出版社,2000.7
[21]陈东祥,王金敏,刘黎,机械制图及CAD基础,北京:机械工业出版社,2004.7
[22]费业泰,误差理论与数据处理,北京:机械工业出版社,2000.5
[23]彭慧,基于PSD的三维位置检测新方法:[硕士学位论文],重庆;重庆大学,2003
[24]刘剑锋,PSD定位理论及其在引信中的应用研究:[硕士学位论文],南京;南京理工大学,2001
[25]李瑞君,范光照,吴彰良,线结构光传感器的精度分析及优化设计,合肥工业大学学报,2004,27(10):1115~1117
[26]张国雄,金篆芷,测控电路,北京:机械工业出版社,2000.9
[27]William H.Hayt ,Jack E.Kemmerly ,Steven M.Durbin. Engineering Circuit Analysis,Published by Publishing House of Electronic Industry,2002.147~171
[28]Sergio Franco. Design with Operational Amplifers and Analog Integrated Circuits, Published by The McGraw-Hill Companies,Inc.2003.187~220
[29]W.Kleuver,M.Fub,D.Justen,K.Hartmann,et al. New triangulation sensor for inside inspection of small drillings and hollows with intergrated image processing. SPIE,1997.349~356
[30]Zeng Lijiang,Hirokazu Matsumo,Kawachi Keiji,et al. Two-directional scanning method for reducing the shadow effect in laser triangulation.Measurement Science&tTechnology.1997.262~266
[31]纪宗南,集成A/D转换器应用技术和实用电路,北京:中国电力出版社,2008
[32]McCormick N J.Confocal scanning optical microscopy in materials science. Microscopy and Analysis,1998.13~16
[33]孙安青,PIC单片机实用C语言程序设计与典型事例,北京:中国电力出版社
[34]刘和平,PIC18Fxxx单片机原理及接口程序设计,北京:北京航空航天大学出版社,2008.8
[35]刘和平,PIC18Fxxx单片机程序设计及应用,北京:北京航空航天大学出版社,2005.2
[36]刘和平,单片机C语言编译器及其应用,北京:北京航空航天大学出版社,2007.1
[37]Keiji Kataka,Yasuyuki,Shibayama,et al. Laser Printer Optics with use of slant scanning of multiple beems.Applied Optics.1997,36(25):6294~6307
[38]邬宽明,单片机外围器件实用手册数据传输接口器件分册,北京:北京航空航天大学出版社,1998.478~508