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101420105167121815(2010)1423523204ScienceTechnologyandEngineeringVol110No114May120102010Sci1Tech1Engng1(,113001),,,AutoCADObjectARXObjectARXTP391.72LA2010210:(1983),,,:,,,,,,,[1],,1,AutoCAD,,(XOY),(XYZ),,[2],2AutoCAD,XOY,(x,y,0)(1),XOZ,XOZ1Set1,XOYSet2,,Point,Line,CircleSet1,Set2P1xmin,P1yminSet1X,Y,1x11z11;P2xmin,P2ymaxSet2X,Y,1x21y23(y21y22)Set1PVPVi(XVi,YVi,0),:XVi=XVi-P1xmin,ZVi=YVi-P1ymin,YVi=0,PViPV,Set2PHPHi(XHi,YHi,0),:XHi=XHi-P2xmin,YHi=P2ymax-YHi,ZHi=0,PHiPH1,1,[3]1Set1Set2(x11,z11,0)(0,0,0)(x12,z12,0)(x12-x11,0,z12-z11)(x13,z13,0)(x13-x11,0,z13-z11)(x14,z14,0)(x14-x11,0,z14-z11)(x21,y21,0)(0,0,0)(x22,y22,0,)(x22-x21,y23-y22,0)(x23,y23,0)(x23-x21,y23-y23,0):(x23-x21,0,0)3Set1,Line,(X1,Y1,0),(X2,Y2,0)X1X2:X1=X2,LineSet2:X1,Y1(x12,z12,0)(x13,z13,0)Set2,(x22,y22,0):(x12,y22,z12)(x13,y22,z13);,YOZ,OX,OY,OZLineX1X2,LineSet2,Set2LineSet2X,XSet1LineX1X21,Set1,(x11,z11,0)(x12,z12,0)Set2(x21,y21,0)(x22,y22,0),x11=x21,x12=x22,XOY,,(X,Y,Z)1,(x11,y21,z11),(x12,y22,z12),(x13,y22,z13),(x14,y23,z14),,,,Set2Set1Set1,,;Set2,,Set2,XOZ425310Set2XOZ,Set1,,,:,,,,,[4]4,,ARXAcad:ErrorStatusAcDbCircle(center,normal,radi2us),center;normal;radius,normal1,,,,ARX[5,6]:AcGePoint3dcenter1(pt[i].x,pt[i].y,pt[i].z);AcGePoint3dcenter2(pt[i+1].x,pt[i+1].y,pt[i+1].z);//doublelength=center1.distanceTo(center2);//AcGeVector3dnormal(pt[i+1].x-pt[i].x,pt[i+1].y-pt[i].y,pt[i+1].z-pt[i].z);//:AcDbCircle3pCircle=newAcDbCircle(center1,normal,radius);AddEntityToDbs(pSolid-1);//2,32CAD35,(,,),:;43[7]46AutoCAD,ObjectARX,,AutoCAD1..:,2005;24(4):1611652,..,20073,..,2004;4:7072525314,:4,..,2008;2:48495.AutoCADObjectARX.,20056,.VisualC++CAD.:,20037.SolidWorks.:,20083DReconstructionofthe2DChemicalProcessPipingDiagramXUEFeng,ZHANGYan,ZHAOPan(SchoolofComputerandCommunicationEngineering,LiaoningShihuaUniversity,Fushun113001,P.R.China)[Abstract]Howtoextracttheinformationfromthemain2viewandtop2viewofchemicalprocesspipein2Disde2scribed,andmatchtheinformationextractedandreconstructthepipein3D.Thusreducesthedesignperiodofpipeandtheefficiencyareimproved.Thematchingmethod,whichenduestheentitieswithdifferentcolorstodifferentiatewhethertheyarematchingsuccessfully,canmakethematchingeffectiveandfast.ThespecificimplementationoftheseprocessesisdonewiththeseconddevelopmentlanguageObjectARXundertheenvironmentofAutoCAD.[Keywords]2Dchemicalprocesspipingdiagram;3DreconstructionobjectARX(3505)3,,[6],1,..:,20022.VisualBasic.:,20073..:,20044,..:,20065,,..,2001;19(01):56597DeKongWL.Optimalestimationoflineardiscrete2timesystemswithstochasticparameters.Automatica,1984;20:113113IndustrialControlSystemsandMeasurementSystemsofNon2linearCorrectionLIUGang2li(ChengduElectromechanicalColledge,Chengdu610031,P.R.China)[Abstract]Themeasurementsystemofindustrialcontrolsystemsandthebasicprinciplesandnon2linearcalibra2tionmethodsaredescribed,focusedonthecontrolsystemanddataacquisitionsysteminthepracticalapplicationofnon2linearcorrection,provenmethodofleastsquarescurvefittingusingcorrectioncanbettersolvethenon2linearpartofthecontrolandmeasurementsystemintheprecisionoftheproblem.[Keywords]non2linearcorrectioncurvefittingtemperaturecontrolaccuracyflowrateaccuracy625310