北师大版小学四年级数学上册《线的认识》教学设计

MANIPULATORISNOWUSEDASAINDUSTRIALROBOTSINUSE,THECONTROLOBJECTIVESOFTENAPPEAROFTENININDUSTRIALAUTOMATIONINDUSTRIALAUTOMATIONTECHNOLOGYHASGRADUALLYMATURED,ASMATUREATECHNOLOGYLINEHASBEENRAPIDDEVELOPMENTININDUSTRIALAUTOMATIONASASEPARATESUBJECTMANIPULATORAPPLICATIONBEGANTOFILTERINTOWELDING,LOGISTICS,MECHANICALPROCESSING,ANDOTHERINDUSTRIESESPECIALLYATHIGHORVERYLOWTEMPERATURES,FULLOFPOISONOUSGASES,HIGHRADIATIONCASE,ROBOTINSIMILARCIRCUMSTANCESSHOWEDGREATUSEALSOBRINGSGREATCONVENIENCETOTHESTAFFPRECISELYBECAUSEOFTHISROBOTTOGETPEOPLESATTENTIONBEGANTOBEAHIGHDEGREEOFDEVELOPMENTLABORRATES,WORKINGCONDITIONS,LABORINTENSIVEASPECTSOFPROMOTINGDEVELOPMENTBOTHATHOMEANDABROADTODEVELOPTHEPLCPROGRAMMABLELOGICCONTROLLERISINVARIOUSSPECIALCIRCUMSTANCESANDUNDERSPECIALCONDITIONSSETFORMECHANICALDEVICESNOWTURNEDONTHEDEVELOPMENTOFTHEMICROELECTRONICSAUTOMATICCONTROLTECHNOLOGYANDTHERAPIDDEVELOPMENTOFTHETRAINS,THESUCCESSOFPLCHARDWARESOFTWAREANDSIMULATIONCONTROLWINBIGANDSUCCESSFULDEVELOPMENT,NOWCONTINUESTODEVELOPASAFACTORYAUTOMATIONSTANDARDSBECAUSEROBOTSAREGOODDEVELOPMENTOFTHETECHNOLOGYMAKESAGOODOPTIMIZATIONOFPRODUCTIVECAPITAL,ANDROBOTSHOWSTHISUNIQUEADVANTAGES,SUCHASHASGOODCOMPATIBILITY,WIDEAVAILABILITY,HARDWAREISCOMPLETE,ANDPROGRAMMINGTHATCANBEMASTEREDINASHORTTIME,SOINTHECONTEXTOFINDUSTRIALPLCAPPLICATIONSBECAMEUBIQUITOUSMANIPULATORINMANYDEVELOPEDCOUNTRYAGRICULTUREANDINDUSTRYHASBEENAPPLIED,SUCHASTHEUSEOFMECHANICALHARVESTINGLARGEAREASOFFARMLAND,REPEATEDOPERATIONSONTHEHIGHSPEEDLINETHATUSESAROBOTICARM,ANDSOONTODAY,THEHIGHLEVELOFAUTOMATIONCOMBINEDWITHRESTRICTIONSONTHEMANIPULATORDEVELOPMENTLEVELISSLIGHTLYLOWERTHANTHEINTERNATIONALTHEDESIGNISMAINLYARMWELDINGMACHINEBYPLCAUTOMATIONCONTROLTHISOFDESIGNLETDESIGNERSONINSCHOOLBYLEARNOFHASAMUSTOFCONSOLIDATION,UNDERSTANDHASSOMEUSUALLYDIDNTOPPORTUNITIESAWARENESSINWORLDRANGEWITHINSOMELEADINGLEVELOFKNOWLEDGEHASHASMUSTAWARENESS,HOPEDESIGNERSCANINYIHOUOFDESIGNINTHECANSUCCESSOFUSINGINTHISDESIGNINTHEPROCEEDSOFEXPERIENCE12MANIPULATORINBOTHATHOMEANDABROADOFRESEARCHPROFILEAUTOMATIONMECHANICALARMRESEARCHBEGANYU20THCENTURYMEDIUMTERM,AFTERYEARSWITHWITHCOMPUTERANDAUTOMATIONTECHNOLOGYOFDEVELOPMENT,MAKESMECHANICALARMONTHEGRANDSTAGEOFINDUSTRIALAUTOMATIONANDSHINE,GRADUALLYBECAMEANINDUSTRIALEVALUATIONSTANDARDS,ANDITSIMPORTANCECANBESEENNOWORIGINALROBOTICARMSPENTMOSTOFMASSPRODUCTIONANDUSEONTHEPRODUCTIONLINE,WHICHISPROGRAMMEDROBOTICARMASTHEFIRSTGENERATIONOFMANIPULATORPOSITIONCONTROLSYSTEMSMAINFEATURES,ALTHOUGHNOTBACKSEVERALGENERATIONSTHATCANDETECTTHEEXTERNALENVIRONMENT,BUTCANSTILLSUCCESSFULLYCOMPLETELIKEWELDING,PAINTING,DELIVERYASWELLASFORMATERIALSSIMPLEMOVEMENTSSECONDGENERATIONMECHANICALARMSAREEQUIPPEDWITHSENSORSANDMANIPULATORSHAVETHEENVIRONMENTTHEREISACERTAINAMOUNTOF“SENSE“,WHENTHEMECHANICALARMISTOUSETHEPROGRAMASABASISDIFFERENCEISTHATTHEROBOTBEGANDMANIPULATORCONTROLMODEANDPROGRAMMABLECONTROLLERSINTRODUCTION21SELECTDISCUSSIONWITHMANIPULATORCONTROL211CLASSIFICATIONOFCONTROLRELAYSANDDISCRETEELECTRONICCIRCUITCANCONTROLOLDINDUSTRIALEQUIPMENT,BUTALSOMORECOMMONMAINLYTHESETWORELATIVELYCHEAPANDYOUCANMEETTHEOLDFASHIONED,SIMPLEORSIMPLEINDUSTRIALEQUIPMENTSOHECANSEETHEMNOW,HOWEVERTHESETWOCONTROLMODESRELAYANDDISCRETEELECTRONICCIRCUITSARETHESEFATALFLAWS1CANNOTADAPTTOTHECOMPLEXLOGICCONTROL,2ONLYFORTHECURRENTPROJECT,THELACKOFCOMPATIBILITYAND3NOTREFORMINGTHESYSTEMWITHEQUIPMENTIMPROVEMENTSSPRINGFORTHEDEVELOPMENTOFCHINASMODERNINDUSTRIALAUTOMATIONTECHNOLOGYTHESUBSTANTIALINCREASEINTHELEVELOFINDUSTRIALAUTOMATION,COMPLETEDTHEPERFECTRELAYOFTHECOMPUTERTOOMUCHINTERMSOFCONTROLLINGTHECOMPUTERSHOWEDHISTWOGREATADVANTAGES1EACHOFTHEHARDWARECANBEINSTALLEDONONEORMOREMICROPROCESSORS2THEOFFICIALDESIGNEROFTHESOFTWAREWRITINGCONTENTCONTROLISALLABOUTNOWINSEVERALWAYSINTHECONTEXTOFINDUSTRIALAUTOMATIONCANOFTENBESEENINTHREEWAYS1PROGRAMMABLELOGICALCONTROLLERREFERREDTOASIPC2DISTRIBUTEDCONTROLSYSTEMDCSFORSHORT,AND3THEPROGRAMMABLELOGICALCONTROLLERPLCFORSHORT212PLCANDTHEIPCANDDCSCONTRASTCONTRAST1,EACHOFTHETHREETECHNOLOGIESOFORIGINSANDDEVELOPMENTREQUIREMENTSFORFASTDATAPROCESSINGMAKESITINVENTEDTHECOMPUTERTHEMENBROUGHTINTERMSOFHARDWARETHERE,USINGAHIGHLEVELOFSTANDARDIZATION,CANUSEMORECOMPATIBILITYTOOLS,ISARICHSOFTWARERESOURCES,ESPECIALLYTHENEEDFORIMMEDIACYINOPERATIONALSYSTEMSSOTHECOMPUTERCANEFFECTIVELYCONTROLISUSEDTOCONTROLANDMEETITSSPEED,ONTHEVIRTUALMODEL,REALTIMEANDINCOMPUTATIONALREQUIREMENTSDISTRIBUTEDSYSTEMSTARTEDWITHACONTROLSYSTEMFORINDUSTRIALAUTOMATICINSTRUMENTUSEDTOCONTROL,WHEREASNOWITISSUCCESSFULLYDEVELOPEDINTOINDUSTRIALCONTROLCOMPUTERUSEDASACENTRALCOLLECTIONANDDISTRIBUTIONSYSTEMANDTRANSITIONOFDISTRIBUTEDCONTROLSYSTEMINANALOGUEHANDLING,LOOPCONTROL,HASBEGUNTOREFLECTTHEUSEOFAHUGEADVANTAGETHOUGHDISTRIBUTEDSYSTEMHASGREATADVANTAGESINLOOPREGULATION,BUTONLYASAMEANSOFCONTINUOUSPROCESSCONTROLOPTIMIZATIONOFPLCISTHECORRESPONDINGRELAYNEEDSWASBORN,ITSMAINUSEINTHEWORKORDERCONTROL,EARLYPRIMARYISREPLACEDRELAYTHISHULKINGSYSTEM,FOCUSEDONTHESWITCHCONTROLLINGTHERUNNINGORDEROFFUNCTIONSMARKEDBYTHEMICROPROCESSORINTHEEARLY1970OFTHE20THCENTURYEMERGED,MICROELECTRONICSTECHNOLOGYHASDEVELOPEDRAPIDLY,PEOPLESOONMICROELECTRONICSPROCESSINGTECHNOLOGYWILLBEUSEDINTHEPROGRAMMABLELOGICALCONTROLLERTHATIS线的认识教学设计颍州区颍西办事处谢庄小学邢兰氏教学内容北师大版小学数学四年级上册第二单元第一课时一、教材分析“线的认识”是空间与图形的内容。这节课的内容主要是认识线段、射线、直线，了解它们的特点并知道三者的区别与联系，用字母正确表示线段，射线，直线。由于线段、射线与直线是一组比较抽象的图形，学生感知有一定的困难，教材中安排了“看一看”的活动，从学生已有的生活经验出发，创设了三幅生动具体的情境图帮助学生理解知识。教材这样的安排是从学生已有的知识和生活经验出发，根据儿童还处于具体形象思维的这一认知特点，让他们通过动手实践、自主探索、合作交流的方式，能够建构线段、射线和直线的概念，知道它们的区别与联系，正确读出三种线。二、学情分析线段、射线与直线是一组比较抽象的图形，学生直接感知有一定的困难。但在学生的生活环境中存在着大量的图形。这些图形是学生学习的重要素材，所以在教学中，多让学生从身边的、常见的、能感受到可以想象的现象中发现熟悉的线段、射线、直线，再通过大量的操作活动，帮助学生积累一些经验，这是学生直观地学习理解线、应用线的有效途径，也是对抽象的概念一种具体的认识和规范，更是感性认识到理性认识的质的飞跃。三、教学目标MANIPULATORISNOWUSEDASAINDUSTRIALROBOTSINUSE,THECONTROLOBJECTIVESOFTENAPPEAROFTENININDUSTRIALAUTOMATIONINDUSTRIALAUTOMATIONTECHNOLOGYHASGRADUALLYMATURED,ASMATUREATECHNOLOGYLINEHASBEENRAPIDDEVELOPMENTININDUSTRIALAUTOMATIONASASEPARATESUBJECTMANIPULATORAPPLICATIONBEGANTOFILTERINTOWELDING,LOGISTICS,MECHANICALPROCESSING,ANDOTHERINDUSTRIESESPECIALLYATHIGHORVERYLOWTEMPERATURES,FULLOFPOISONOUSGASES,HIGHRADIATIONCASE,ROBOTINSIMILARCIRCUMSTANCESSHOWEDGREATUSEALSOBRINGSGREATCONVENIENCETOTHESTAFFPRECISELYBECAUSEOFTHISROBOTTOGETPEOPLESATTENTIONBEGANTOBEAHIGHDEGREEOFDEVELOPMENTLABORRATES,WORKINGCONDITIONS,LABORINTENSIVEASPECTSOFPROMOTINGDEVELOPMENTBOTHATHOMEANDABROADTODEVELOPTHEPLCPROGRAMMABLELOGICCONTROLLERISINVARIOUSSPECIALCIRCUMSTANCESANDUNDERSPECIALCONDITIONSSETFORMECHANICALDEVICESNOWTURNEDONTHEDEVELOPMENTOFTHEMICROELECTRONICSAUTOMATICCONTROLTECHNOLOGYANDTHERAPIDDEVELOPMENTOFTHETRAINS,THESUCCESSOFPLCHARDWARESOFTWAREANDSIMULATIONCONTROLWINBIGANDSUCCESSFULDEVELOPMENT,NOWCONTINUESTODEVELOPASAFACTORYAUTOMATIONSTANDARDSBECAUSEROBOTSAREGOODDEVELOPMENTOFTHETECHNOLOGYMAKESAGOODOPTIMIZATIONOFPRODUCTIVECAPITAL,ANDROBOTSHOWSTHISUNIQUEADVANTAGES,SUCHASHASGOODCOMPATIBILITY,WIDEAVAILABILITY,HARDWAREISCOMPLETE,ANDPROGRAMMINGTHATCANBEMASTEREDINASHORTTIME,SOINTHECONTEXTOFINDUSTRIALPLCAPPLICATIONSBECAMEUBIQUITOUSMANIPULATORINMANYDEVELOPEDCOUNTRYAGRICULTUREANDINDUSTRYHASBEENAPPLIED,SUCHASTHEUSEOFMECHANICALHARVESTINGLARGEAREASOFFARMLAND,REPEATEDOPERATIONSONTHEHIGHSPEEDLINETHATUSESAROBOTICARM,ANDSOONTODAY,THEHIGHLEVELOFAUTOMATIONCOMBINEDWITHRESTRICTIONSONTHEMANIPULATORDEVELOPMENTLEVELISSLIGHTLYLOWERTHANTHEINTERNATIONALTHEDESIGNISMAINLYARMWELDINGMACHINEBYPLCAUTOMATIONCONTROLTHISOFDESIGNLETDESIGNERSONINSCHOOLBYLEARNOFHASAMUSTOFCONSOLIDATION,UNDERSTANDHASSOMEUSUALLYDIDNTOPPORTUNITIESAWARENESSINWORLDRANGEWITHINSOMELEADINGLEVELOFKNOWLEDGEHASHASMUSTAWARENESS,HOPEDESIGNERSCANINYIHOUOFDESIGNINTHECANSUCCESSOFUSINGINTHISDESIGNINTHEPROCEEDSOFEXPERIENCE12MANIPULATORINBOTHATHOMEANDABROADOFRESEARCHPROFILEAUTOMATIONMECHANICALARMRESEARCHBEGANYU20THCENTURYMEDIUMTERM,AFTERYEARSWITHWITHCOMPUTERANDAUTOMATIONTECHNOLOGYOFDEVELOPMENT,MAKESMECHANICALARMONTHEGRANDSTAGEOFINDUSTRIALAUTOMATIONANDSHINE,GRADUALLYBECAMEANINDUSTRIALEVALUATIONSTANDARDS,ANDITSIMPORTANCECANBESEENNOWORIGINALROBOTICARMSPENTMOSTOFMASSPRODUCTIONANDUSEONTHEPRODUCTIONLINE,WHICHISPROGRAMMEDROBOTICARMASTHEFIRSTGENERATIONOFMANIPULATORPOSITIONCONTROLSYSTEMSMAINFEATURES,ALTHOUGHNOTBACKSEVERALGENERATIONSTHATCANDETECTTHEEXTERNALENVIRONMENT,BUTCANSTILLSUCCESSFULLYCOMPLETELIKEWELDING,PAINTING,DELIVERYASWELLASFORMATERIALSSIMPLEMOVEMENTSSECONDGENERATIONMECHANICALARMSAREEQUIPPEDWITHSENSORSANDMANIPULATORSHAVETHEENVIRONMENTTHEREISACERTAINAMOUNTOF“SENSE“,WHENTHEMECHANICALARMISTOUSETHEPROGRAMASABASISDIFFERENCEISTHATTHEROBOTBEGANDMANIPULATORCONTROLMODEANDPROGRAMMABLECONTROLLERSINTRODUCTION21SELECTDISCUSSIONWITHMANIPULATORCONTROL211CLASSIFICATIONOFCONTROLRELAYSANDDISCRETEELECTRONICCIRCUITCANCONTROLOLDINDUSTRIALEQUIPMENT,BUTALSOMORECOMMONMAINLYTHESETWORELATIVELYCHEAPANDYOUCANMEETTHEOLDFASHIONED,SIMPLEORSIMPLEINDUSTRIALEQUIPMENTSOHECANSEETHEMNOW,HOWEVERTHESETWOCONTROLMODESRELAYANDDISCRETEELECTRONICCIRCUITSARETHESEFATALFLAWS1CANNOTADAPTTOTHECOMPLEXLOGICCONTROL,2ONLYFORTHECURRENTPROJECT,THELACKOFCOMPATIBILITYAND3NOTREFORMINGTHESYSTEMWITHEQUIPMENTIMPROVEMENTSSPRINGFORTHEDEVELOPMENTOFCHINASMODERNINDUSTRIALAUTOMATIONTECHNOLOGYTHESUBSTANTIALINCREASEINTHELEVELOFINDUSTRIALAUTOMATION,COMPLETEDTHEPERFECTRELAYOFTHECOMPUTERTOOMUCHINTERMSOFCONTROLLINGTHECOMPUTERSHOWEDHISTWOGREATADVANTAGES1EACHOFTHEHARDWARECANBEINSTALLEDONONEORMOREMICROPROCESSORS2THEOFFICIALDESIGNEROFTHESOFTWAREWRITINGCONTENTCONTROLISALLABOUTNOWINSEVERALWAYSINTHECONTEXTOFINDUSTRIALAUTOMATIONCANOFTENBESEENINTHREEWAYS1PROGRAMMABLELOGICALCONTROLLERREFERREDTOASIPC2DISTRIBUTEDCONTROLSYSTEMDCSFORSHORT,AND3THEPROGRAMMABLELOGICALCONTROLLERPLCFORSHORT212PLCANDTHEIPCANDDCSCONTRASTCONTRAST1,EACHOFTHETHREETECHNOLOGIESOFORIGINSANDDEVELOPMENTREQUIREMENTSFORFASTDATAPROCESSINGMAKESITINVENTEDTHECOMPUTERTHEMENBROUGHTINTERMSOFHARDWARETHERE,USINGAHIGHLEVELOFSTANDARDIZATION,CANUSEMORECOMPATIBILITYTOOLS,ISARICHSOFTWARERESOURCES,ESPECIALLYTHENEEDFORIMMEDIACYINOPERATIONALSYSTEMSSOTHECOMPUTERCANEFFECTIVELYCONTROLISUSEDTOCONTROLANDMEETITSSPEED,ONTHEVIRTUALMODEL,REALTIMEANDINCOMPUTATIONALREQUIREMENTSDISTRIBUTEDSYSTEMSTARTEDWITHACONTROLSYSTEMFORINDUSTRIALAUTOMATICINSTRUMENTUSEDTOCONTROL,WHEREASNOWITISSUCCESSFULLYDEVELOPEDINTOINDUSTRIALCONTROLCOMPUTERUSEDASACENTRALCOLLECTIONANDDISTRIBUTIONSYSTEMANDTRANSITIONOFDISTRIBUTEDCONTROLSYSTEMINANALOGUEHANDLING,LOOPCONTROL,HASBEGUNTOREFLECTTHEUSEOFAHUGEADVANTAGETHOUGHDISTRIBUTEDSYSTEMHASGREATADVANTAGESINLOOPREGULATION,BUTONLYASAMEANSOFCONTINUOUSPROCESSCONTROLOPTIMIZATIONOFPLCISTHECORRESPONDINGRELAYNEEDSWASBORN,ITSMAINUSEINTHEWORKORDERCONTROL,EARLYPRIMARYISREPLACEDRELAYTHISHULKINGSYSTEM,FOCUSEDONTHESWITCHCONTROLLINGTHERUNNINGORDEROFFUNCTIONSMARKEDBYTHEMICROPROCESSORINTHEEARLY1970OFTHE20THCENTURYEMERGED,MICROELECTRONICSTECHNOLOGYHASDEVELOPEDRAPIDLY,PEOPLESOONMICROELECTRONICSPROCESSINGTECHNOLOGYWILLBEUSEDINTHEPROGRAMMABLELOGICALCONTROLLERTHATIS（一）知识与技能1、借助实际情境，认识线段，射线与直线。并知道它们的区别与联系。2、会用字母正确表示线段，射线与直线。3、会数简单图形中的线段。4、培养操作、观察、发现、总结、概括等能力。5、在活动中进一步发展空间观念。（二）过程与方法引导学生经历“看一看”，“认一认”，“拉一拉”，“量一量”等数学活动，借助实际情景认识线段、射线与直线。（三）情感态度与价值观体验数学知识与日常生活之间的密切联系，激发学习兴趣，感受数学的重要作用。四、教法学法教法创设情境、演示讲解。学法观察思考、实际操作、活动探究、归纳概括。五、教学用具教具激光灯、细绳、直尺、幻灯片。学具细绳、直尺。六、教学重难点重点认识、区分线段、射线与直线。难点理解直线与射线的含义。MANIPULATORISNOWUSEDASAINDUSTRIALROBOTSINUSE,THECONTROLOBJECTIVESOFTENAPPEAROFTENININDUSTRIALAUTOMATIONINDUSTRIALAUTOMATIONTECHNOLOGYHASGRADUALLYMATURED,ASMATUREATECHNOLOGYLINEHASBEENRAPIDDEVELOPMENTININDUSTRIALAUTOMATIONASASEPARATESUBJECTMANIPULATORAPPLICATIONBEGANTOFILTERINTOWELDING,LOGISTICS,MECHANICALPROCESSING,ANDOTHERINDUSTRIESESPECIALLYATHIGHORVERYLOWTEMPERATURES,FULLOFPOISONOUSGASES,HIGHRADIATIONCASE,ROBOTINSIMILARCIRCUMSTANCESSHOWEDGREATUSEALSOBRINGSGREATCONVENIENCETOTHESTAFFPRECISELYBECAUSEOFTHISROBOTTOGETPEOPLESATTENTIONBEGANTOBEAHIGHDEGREEOFDEVELOPMENTLABORRATES,WORKINGCONDITIONS,LABORINTENSIVEASPECTSOFPROMOTINGDEVELOPMENTBOTHATHOMEANDABROADTODEVELOPTHEPLCPROGRAMMABLELOGICCONTROLLERISINVARIOUSSPECIALCIRCUMSTANCESANDUNDERSPECIALCONDITIONSSETFORMECHANICALDEVICESNOWTURNEDONTHEDEVELOPMENTOFTHEMICROELECTRONICSAUTOMATICCONTROLTECHNOLOGYANDTHERAPIDDEVELOPMENTOFTHETRAINS,THESUCCESSOFPLCHARDWARESOFTWAREANDSIMULATIONCONTROLWINBIGANDSUCCESSFULDEVELOPMENT,NOWCONTINUESTODEVELOPASAFACTORYAUTOMATIONSTANDARDSBECAUSEROBOTSAREGOODDEVELOPMENTOFTHETECHNOLOGYMAKESAGOODOPTIMIZATIONOFPRODUCTIVECAPITAL,ANDROBOTSHOWSTHISUNIQUEADVANTAGES,SUCHASHASGOODCOMPATIBILITY,WIDEAVAILABILITY,HARDWAREISCOMPLETE,ANDPROGRAMMINGTHATCANBEMASTEREDINASHORTTIME,SOINTHECONTEXTOFINDUSTRIALPLCAPPLICATIONSBECAMEUBIQUITOUSMANIPULATORINMANYDEVELOPEDCOUNTRYAGRICULTUREANDINDUSTRYHASBEENAPPLIED,SUCHASTHEUSEOFMECHANICALHARVESTINGLARGEAREASOFFARMLAND,REPEATEDOPERATIONSONTHEHIGHSPEEDLINETHATUSESAROBOTICARM,ANDSOONTODAY,THEHIGHLEVELOFAUTOMATIONCOMBINEDWITHRESTRICTIONSONTHEMANIPULATORDEVELOPMENTLEVELISSLIGHTLYLOWERTHANTHEINTERNATIONALTHEDESIGNISMAINLYARMWELDINGMACHINEBYPLCAUTOMATIONCONTROLTHISOFDESIGNLETDESIGNERSONINSCHOOLBYLEARNOFHASAMUSTOFCONSOLIDATION,UNDERSTANDHASSOMEUSUALLYDIDNTOPPORTUNITIESAWARENESSINWORLDRANGEWITHINSOMELEADINGLEVELOFKNOWLEDGEHASHASMUSTAWARENESS,HOPEDESIGNERSCANINYIHOUOFDESIGNINTHECANSUCCESSOFUSINGINTHISDESIGNINTHEPROCEEDSOFEXPERIENCE12MANIPULATORINBOTHATHOMEANDABROADOFRESEARCHPROFILEAUTOMATIONMECHANICALARMRESEARCHBEGANYU20THCENTURYMEDIUMTERM,AFTERYEARSWITHWITHCOMPUTERANDAUTOMATIONTECHNOLOGYOFDEVELOPMENT,MAKESMECHANICALARMONTHEGRANDSTAGEOFINDUSTRIALAUTOMATIONANDSHINE,GRADUALLYBECAMEANINDUSTRIALEVALUATIONSTANDARDS,ANDITSIMPORTANCECANBESEENNOWORIGINALROBOTICARMSPENTMOSTOFMASSPRODUCTIONANDUSEONTHEPRODUCTIONLINE,WHICHISPROGRAMMEDROBOTICARMASTHEFIRSTGENERATIONOFMANIPULATORPOSITIONCONTROLSYSTEMSMAINFEATURES,ALTHOUGHNOTBACKSEVERALGENERATIONSTHATCANDETECTTHEEXTERNALENVIRONMENT,BUTCANSTILLSUCCESSFULLYCOMPLETELIKEWELDING,PAINTING,DELIVERYASWELLASFORMATERIALSSIMPLEMOVEMENTSSECONDGENERATIONMECHANICALARMSAREEQUIPPEDWITHSENSORSANDMANIPULATORSHAVETHEENVIRONMENTTHEREISACERTAINAMOUNTOF“SENSE“,WHENTHEMECHANICALARMISTOUSETHEPROGRAMASABASISDIFFERENCEISTHATTHEROBOTBEGANDMANIPULATORCONTROLMODEANDPROGRAMMABLECONTROLLERSINTRODUCTION21SELECTDISCUSSIONWITHMANIPULATORCONTROL211CLASSIFICATIONOFCONTROLRELAYSANDDISCRETEELECTRONICCIRCUITCANCONTROLOLDINDUSTRIALEQUIPMENT,BUTALSOMORECOMMONMAINLYTHESETWORELATIVELYCHEAPANDYOUCANMEETTHEOLDFASHIONED,SIMPLEORSIMPLEINDUSTRIALEQUIPMENTSOHECANSEETHEMNOW,HOWEVERTHESETWOCONTROLMODESRELAYANDDISCRETEELECTRONICCIRCUITSARETHESEFATALFLAWS1CANNOTADAPTTOTHECOMPLEXLOGICCONTROL,2ONLYFORTHECURRENTPROJECT,THELACKOFCOMPATIBILITYAND3NOTREFORMINGTHESYSTEMWITHEQUIPMENTIMPROVEMENTSSPRINGFORTHEDEVELOPMENTOFCHINASMODERNINDUSTRIALAUTOMATIONTECHNOLOGYTHESUBSTANTIALINCREASEINTHELEVELOFINDUSTRIALAUTOMATION,COMPLETEDTHEPERFECTRELAYOFTHECOMPUTERTOOMUCHINTERMSOFCONTROLLINGTHECOMPUTERSHOWEDHISTWOGREATADVANTAGES1EACHOFTHEHARDWARECANBEINSTALLEDONONEORMOREMICROPROCESSORS2THEOFFICIALDESIGNEROFTHESOFTWAREWRITINGCONTENTCONTROLISALLABOUTNOWINSEVERALWAYSINTHECONTEXTOFINDUSTRIALAUTOMATIONCANOFTENBESEENINTHREEWAYS1PROGRAMMABLELOGICALCONTROLLERREFERREDTOASIPC2DISTRIBUTEDCONTROLSYSTEMDCSFORSHORT,AND3THEPROGRAMMABLELOGICALCONTROLLERPLCFORSHORT212PLCANDTHEIPCANDDCSCONTRASTCONTRAST1,EACHOFTHETHREETECHNOLOGIESOFORIGINSANDDEVELOPMENTREQUIREMENTSFORFASTDATAPROCESSINGMAKESITINVENTEDTHECOMPUTERTHEMENBROUGHTINTERMSOFHARDWARETHERE,USINGAHIGHLEVELOFSTANDARDIZATION,CANUSEMORECOMPATIBILITYTOOLS,ISARICHSOFTWARERESOURCES,ESPECIALLYTHENEEDFORIMMEDIACYINOPERATIONALSYSTEMSSOTHECOMPUTERCANEFFECTIVELYCONTROLISUSEDTOCONTROLANDMEETITSSPEED,ONTHEVIRTUALMODEL,REALTIMEANDINCOMPUTATIONALREQUIREMENTSDISTRIBUTEDSYSTEMSTARTEDWITHACONTROLSYSTEMFORINDUSTRIALAUTOMATICINSTRUMENTUSEDTOCONTROL,WHEREASNOWITISSUCCESSFULLYDEVELOPEDINTOINDUSTRIALCONTROLCOMPUTERUSEDASACENTRALCOLLECTIONANDDISTRIBUTIONSYSTEMANDTRANSITIONOFDISTRIBUTEDCONTROLSYSTEMINANALOGUEHANDLING,LOOPCONTROL,HASBEGUNTOREFLECTTHEUSEOFAHUGEADVANTAGETHOUGHDISTRIBUTEDSYSTEMHASGREATADVANTAGESINLOOPREGULATION,BUTONLYASAMEANSOFCONTINUOUSPROCESSCONTROLOPTIMIZATIONOFPLCISTHECORRESPONDINGRELAYNEEDSWASBORN,ITSMAINUSEINTHEWORKORDERCONTROL,EARLYPRIMARYISREPLACEDRELAYTHISHULKINGSYSTEM,FOCUSEDONTHESWITCHCONTROLLINGTHERUNNINGORDEROFFUNCTIONSMARKEDBYTHEMICROPROCESSORINTHEEARLY1970OFTHE20THCENTURYEMERGED,MICROELECTRONICSTECHNOLOGYHASDEVELOPEDRAPIDLY,PEOPLESOONMICROELECTRONICSPROCESSINGTECHNOLOGYWILLBEUSEDINTHEPROGRAMMABLELOGICALCONTROLLERTHATIS七、教学过程（一）创设情景、导入新课师这节课老师带来了一个玩具。（师拿出激光灯）师你愿意和老师一起玩吗生师射出一条光线，端点在墙上。问你看到了什么生师生活中的线多吗生百度图片搜索_线段在生活中的体现师这节课我们就来认识线。（板书课题）（二）小组合作，深入探究1、认识线段（1）建立线段的数学模型，认识端点师观察这一束线，它从什么地方开始，到达什么地方生答。师引导得出这条线的起点和终点的地方叫这条线段的端点。师这条光线有几条端点他是什么形状的生答后师问你能用手中的线拉一条像这条光束的线吗生互相交流，师指一名生到前展示。师XX同学两只手捏住的中间这一段直直的线就是一条线段，两只手捏住的线的两端就是这条线段的两个端点。请你像老师这样MANIPULATORISNOWUSEDASAINDUSTRIALROBOTSINUSE,THECONTROLOBJECTIVESOFTENAPPEAROFTENININDUSTRIALAUTOMATIONINDUSTRIALAUTOMATIONTECHNOLOGYHASGRADUALLYMATURED,ASMATUREATECHNOLOGYLINEHASBEENRAPIDDEVELOPMENTININDUSTRIALAUTOMATIONASASEPARATESUBJECTMANIPULATORAPPLICATIONBEGANTOFILTERINTOWELDING,LOGISTICS,MECHANICALPROCESSING,ANDOTHERINDUSTRIESESPECIALLYATHIGHORVERYLOWTEMPERATURES,FULLOFPOISONOUSGASES,HIGHRADIATIONCASE,ROBOTINSIMILARCIRCUMSTANCESSHOWEDGREATUSEALSOBRINGSGREATCONVENIENCETOTHESTAFFPRECISELYBECAUSEOFTHISROBOTTOGETPEOPLESATTENTIONBEGANTOBEAHIGHDEGREEOFDEVELOPMENTLABORRATES,WORKINGCONDITIONS,LABORINTENSIVEASPECTSOFPROMOTINGDEVELOPMENTBOTHATHOMEANDABROADTODEVELOPTHEPLCPROGRAMMABLELOGICCONTROLLERISINVARIOUSSPECIALCIRCUMSTANCESANDUNDERSPECIALCONDITIONSSETFORMECHANICALDEVICESNOWTURNEDONTHEDEVELOPMENTOFTHEMICROELECTRONICSAUTOMATICCONTROLTECHNOLOGYANDTHERAPIDDEVELOPMENTOFTHETRAINS,THESUCCESSOFPLCHARDWARESOFTWAREANDSIMULATIONCONTROLWINBIGANDSUCCESSFULDEVELOPMENT,NOWCONTINUESTODEVELOPASAFACTORYAUTOMATIONSTANDARDSBECAUSEROBOTSAREGOODDEVELOPMENTOFTHETECHNOLOGYMAKESAGOODOPTIMIZATIONOFPRODUCTIVECAPITAL,ANDROBOTSHOWSTHISUNIQUEADVANTAGES,SUCHASHASGOODCOMPATIBILITY,WIDEAVAILABILITY,HARDWAREISCOMPLETE,ANDPROGRAMMINGTHATCANBEMASTEREDINASHORTTIME,SOINTHECONTEXTOFINDUSTRIALPLCAPPLICATIONSBECAMEUBIQUITOUSMANIPULATORINMANYDEVELOPEDCOUNTRYAGRICULTUREANDINDUSTRYHASBEENAPPLIED,SUCHASTHEUSEOFMECHANICALHARVESTINGLARGEAREASOFFARMLAND,REPEATEDOPERATIONSONTHEHIGHSPEEDLINETHATUSESAROBOTICARM,ANDSOONTODAY,THEHIGHLEVELOFAUTOMATIONCOMBINEDWITHRESTRICTIONSONTHEMA