单圈绝对式光电轴角编码器原理的研究

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1、中国科学院长春光学精密机械与物理研究所博士学位论文单圈绝对式光电轴角编码器原理的研究姓名：陈赟申请学位级别：博士专业：机械制造及其自动化指导教师：何惠阳20060614AbstractPhotoelectricalshaftencoderisanangledisplacementphotoelectricalsensor．Itisadigitalanglemeasurementdeviceinwhichoptics，mechanicsandelectricityareintegrated．With

2、photoelectricaltechnology,thephysicalmeasurementssuchasangleinformation，linedisplacement，velocity,accelerationaretransformedintoelectronicsignal．Thesignalissenttocomputertoaccomplishthedynamicsmeasurementandrealtimecontrolbycompare，magllify,pulse—shap

3、ing，correction，subdivisionandcoding．Theencoderisabroadappliedinmanydifferentfieldssuchasradar,photoelectricaltheodolite，avigation，spaceflight，numericalcontrolmachinetool，robot，commandinstrument，highprecisionclosedlooptimingsystemandsoon．Withthedevelop

4、mentoftechnology,theexigentrequirementofmanyfieldssuchaswarindustry．,nationaldefence，autocontrolneedsminitypesensorwithhighprecision．highresolutionandintelligent．Themeasurementprecisionandthesizeoftraditionabsolute．photoelectricalshaftencoderusingmoir

5、estripetomeasureangledisplacementisunabletoconsist．whichcan’tsarisfywithdevelopmenttrend，soweshoulddevelopanewtypeofphotoelectricalshaftencodertomeetwiththeneeds．Firstly．basedonanalyzingandstudyingthecodingmodeandcodingtheoryofphotoelectricalshaftenco

6、derpresentlyespeciallyGraycode．anewtypeofcodingmethodispresentedinthispaperaccordingtothetheoryoftraditionabsoluteencoderhowtogainabsoluteangledisplacementinformation．Thecodingmethodneedgraduateasingleringoncodedisctoobtainanglepositionbyspecialarithm

7、etic．ThecodescanbegivenbyusingVCtopro-grarfl．Secondly,accordingtothegainedcodes，asingleringabsolutecodediscismadebytouchphotolithographicmethod．Theconfigurationandtheilluminationsystemofsingleringabsolutephotoelectficalshaftencoderwhosecorecomponentis

8、thecodediscaredesigned，andthereceivingsystemtakinggPD3575DlinerCCDasreceivingcomponentisalsooffered．ThedrivingcircuitoflaPD3575DlinearCCDisdesignedbasedoncomplexprogrammablelogicdevice(abbr．CPLD)．ThedrivingcircuitCallprovidemultifolddrivingpul