optical 3d deformation analysis
TRANSCRIPT
Optical 3D Deformation Analysis
3D Surface - Displacements - Strainsin Material and Component Testing
Optical 3D Deformation Analysis
ARAMIS helps to better understand material and component behavior and is ideally suited to monitor experiments with high temporal and local resolution. ARAMIS is a non-contact and material independent measuring system providing, for static or dynamically loaded test objects, accurate:
• 3Dsurfacecoordinates• 3Ddisplacementsandvelocities• Surfacestrainvalues• Strainrates
Unlike other techniques, ARAMIS is a robust solution forfull-fieldanalysisofsmallspecimens(mm)uptolargecomponents(multiple10m).Measurementsare carried out independently from geometry and tem pe rature without time-consuming and expensive specimen preparation.
ARAMIS is the solution for …
• Determinationofmaterialproperties• Componentanalysis• VerificationofFiniteElementAnalysis• Real-Timecontrollingoftestingdevices
ARAMIS Features
• Non-contact• Materialindependent• Geometryindependent• 2Dand3Dmeasurement• Mobileandflexible• Full-field• Highaccuracy• Hightemperature• Highspeed• Easyspecimenpreparation• Integrationintestingenvironments• Smallesttolargestobjectsizes• Smallesttolargestdeformations
Sub-pixel accurate image processing for 3D surface, displacement and strain measurement
ARAMIS evaluates high-resolution images recorded from any test object during loading. With the help of adjustment computations, a precise mathematical calibration model of the sensor setup is calculated including camera positions and lens distortion parameters.
The image processing is based on the principle of digitalimagecorrelation.Greyvaluedistributionsare calculated for a large amount of small subsets in each camera image and provide sub-pixel ac cu -rate positions about corresponding points between all images.
The mathematical model of the sensor setup, the digital image correlation method and a tri an gu la-tion calculation are combined to derive high ac cu rate 3D coordinates. Subtracting the surface in for mation in all loading stages in 3D space pro-vides precise X,Y and Z displacement values.
Strains are calculated considering the component‘s geometry and plasticity theory. As the image acquisition is time-based, 3D velocities and strain rates are automatically achieved.
ARAMIS provides the measurement results as
• Full-field3Dcoordinates,displacements and strains• Fineresolution3Dmesh• Plainstraintensor• Objectcontourbasedvisualization
Measuring for a better understanding
Important factors in product development processes are the dimensioning of components, theexactdeterminationofmaterialpropertiesandthevalidationofFEcalculationmodels.ARAMIS helps to better understand material and component behavior.
Material testing
Theprecisefull-fieldARAMISresultsimprovetheaccuracyofmaterialcharacteristicvalues.
Existingevaluationproceduresareenhancedandthusmorereliable,likethedetermination offlowcurvesandforminglimitcurves.Alotofmaterialtestscanonlybeevaluatedbecause of the non-contact measurement and the high local resolution ARAMIS results.
• Hightemperaturetests• Highspeedtests• Verysmallspecimensizes
Today, ARAMIS is an established and proven measuring solution in hundreds of material research facilities around the world for:
• Strain-Stressevaluation• R-Values• Poissonratio• Young‘smodulus• Forminglimitcurves• Residualstress• Shearmodulus
Real-Time 3D measuring
ARAMIS provides real-time results for multiple measurement positions on a specimen‘s surface. These are directly transferred to testing devices, data acquisition units or processing softwares (e.g.LabView,DIAdem,MSExcel,etc.)andareused for
• Controllingoftestingdevices• Long-termtestswithsmalleststorage requirements• Vibrationanalysis• 3DVideoExtensometer
ARAMIS is the right tool for the understanding of the component itself as it is
• independentfrommaterial,sizeandgeometry• andmeasuringunderreal-useconditions.
ARAMIS considers the real component geometry which would not be possible with traditional measuring devices like strain gauges, displacement sensors(LVDT),vibrometers,etc.
3D measurement results are always required as a 3D object leads to non-linear deformation behavior. ARAMIS links to the component’s original 3D CAD data for transformations, direct comparisonsandvisualizations.
ARAMIS provides all results for static and dynamic tests even at high speeds for smallest to largest components for
• Strengthassessment• Vibrationanalysis• Durabilitystudies• Crashtests
Finite Element Analysis
Newproductsandproductionprocessesare designedandoptimizedwithnumericalsimulationmethods. Material parameters and component deformationbehaviorhaveasignificantinfluenceon the accuracy of simulation calculations and their reliability.
ARAMIS is used for the determination of material parametersasFEinputvaluesandthevalidationof numerical simulations by calculating thedifferences between experimental measurements andFEdata.
Component testing and analysis
The basic workflow
PreparationThemobileARAMISsensorisadjustedtotherequiredspecimensizeandpositionedin front of the specimen.
Measurement ARAMIS acquires the images and analog data during loading of the component.
• User-definableimageacquisition• Flexibletriggering(manual,timesequence,TTL,analogsignals)• Integrateddatalogger• Real-Timemeasurement
EvaluationARAMIS automatically computes 3D coordinates for all loading stages and derives surface, displacement and strain results.
• Computationofmaterialparameters• CADimportandcomparison• Coordinatetransformation(3-2-1,CAD,Best-Fit,…)• Rigidbodymotioncompensation• Calculationofgeometricalelements(cylinders,circles,cones,spheres,planes,…)• Evaluationofacquiredanalogdata• ComparisontoFiniteElementSimulationincludingimportandexport
ReportingThe ARAMIS reporting engine is based on templates for complete automatic report generation.Allresultsareavailableforuser-definable3Dvisualizations,diagrams,tables,videos,imagesandcanbeexportedinstandardfileformats.
Non-contact 3D surface, displacements and strainsARAMIS is the unique solution delivering complete 3D surface, displacement and strain results where a large numberoftraditionalmeasuringdevicesarerequired(straingauges,LVDTs,extensometers,…).
ARAMIS Advantages
Local and global deformation behaviorARAMIS results are comparable to values from hundredsorthousandsofstraingauges,LVDTsand extensometers on one specimen. These full-fieldmeasurementdatarepresentlocaleffectsand global deformations for an easy understanding of material and component behavior.
More information - fasterARAMIS preparation and setup is easy, leading to quickly available measuring results.
From smallest to largest strainsARAMIS is the only reasonable method to measure from smallest strains to multiple hundred percent deformation(e.g.polymerspecimenswith1000%strain).
Matching the applicationsARAMIS can be set up to meet optimum measuring speeds, resolutions and areas of interest.
Sensor ControllerARAMIS comes with an integrated sensor controller which allows adaptation to the testing environment. This controller is used for aligning the image acquisition to the test procedure, recoding analog values and communicating with testing devices.
The sensor controller is specially developed by GOMtoprovideanautomatedandsecure integration in material and component testing process chains.
Process reliabilityTheARAMISsensorisbasedonGOM’sprovenstereo-camera technique, guaranteeing • Compensatingforenvironmentalinfluences (e.g.roomtemperature,vibration)• Monitoringthesensorcalibrationautomatically• Identifyingandcompensatingrigidbody motion
Cameras• CCDandCMOScameras• Differentimageresolutions• Adjustableimagesize• User-definableacquisitionspeedstomeetappli- cation requirements• Stableandcertifiedlenses
Sensor• Adjustableorfixedcameraframe• Robustandstable• Notoolsforsensoradjustmentrequired• Integratedobjectillumination• Integratedlaserpointerforsimplifiedpositioning
Sensor Controller• Powersupplyforcameras,illuminationand positioning pointer• Triggerunit• Synchronizedimageacquisition• Analoguedatainputandoutput
Computer / Notebook• 64bitprocessingpower• Industrialgradeandcertifiedcomponents
Transport Cases• Adjustableworkplateforsittingorstanding working height• Robustandprovensensorprotectioncase
Certification• Certifiedcalibrationartifacts• NISTandPTBcertifiedsoftwarealgorithms• FCCcertifiedcomputer
Software• Completesoftwarefromonesource
The Complete ARAMIS System
15Hzupto29Hz
2448x2050px
ARAMIS Technical Data
Sensor Controller Technical Data
FrameRate
Camera Resolution
5kHzupto1MHz
upto1024x1024px
60Hzupto480Hz
2352x1728px
24Hzupto200Hz
4096x3072px
500Hzupto4000Hz
1280x1024px
Measuring Area
Strain Measuring Range
Strain Measuring Accuracy
mm² to > m²
0.01%upto>100%
upto0.01%
5MConfiguration 4M 12M HS High Speed
CameraFrame
ToolFreeMounting
IntegratedCableGuide
PositioningPointers
Illumination
adjustable/fixed
•
•
1or3
integrated
•
usesPCRAM
adjustable/fixed
•
•
1or3
integrated
•
usesPCRAM
adjustable/fixed
•
•
1or3
integrated
•
usesPCRAM
adjustable/fixed
•
•
1or3
external
•
usesPCRAM
adjustable
-
-
-
external
•
camera RAM
High-EndRackMountPC
Notebook
Control Device
•
•
sensor controller
•
-
sensor controller
•
-
sensor controller
•
-
sensor controller
•
•
optional
SensorDimensions(heightxdepth)
SensorDimensions(length)
Weight
OperatingTemperature
Humidity
PowerSupply
175x180mm
variable
5kg
5–40°
non-condensing
90-230VAC
235x185mm
variable
6.5kg
5–40°
non-condensing
90-230VAC
215x185mm
variable
6.5kg
5–40°
non-condensing
90-230VAC
230x185mm
variable
6kg
5–40°
non-condensing
90-230VAC
variable
5–40°
non-condensing
90-230VAC
Additionalsensorconfigurationsavailableonrequest.
Analog Input
Channels
Digital Resolution
VoltageRange
SamplingFrequency
8
16bit
-10Vto+10V
upto100kHz
AnalogOutput
Channels
Digital Resolution
VoltageRange
SamplingFrequency
4
12bit
0Vto+10V
upto500Hz
Dimensions
Weight
OperatingTemperature
Humidity
PowerSupply
445x44x370mm³
2.8kg
5–40°
non-condensing
90-230VAC
Trigger
EventListBasedTriggering
pre / direct / post
points in time, analog values, external signals
Powerfor
Communication / Data Transfer
cameras, illumination, positioning pointers
gigabitethernet(TCP/IP)
RingBuffer
Image Memory
GOMprovidesacompletesolutionwiththeARAMISsystem for measuring, evaluation and reporting.
• Optimizedworkflows–timesaving• Userfriendly–onetrainingsession• Onesupportcontact
GOMcompletelydevelopstheARAMIShardwareand software in house. The software is designed to run the sensor and controller, to process all measurements, to automatically compute result data and to perform post-processing.
ARAMIS is an industrial grade solution providing all necessary functionalities even for complex research tasks.
ARAMIS is integrated in standard process chains through versatile import and export capabilities. Material parameters, testing device outputs and data logs are imported and used for further calculation of characteristic values.
CAD data are used for transformations and deviation calculations. • Native:Catiav4/v5,UG,ProE• General:IGES,STL,VDA,STEP
To close the process loop, all result data are exported instandardorfreedefinableformats.
Allworkflowsareavailableforautomatedusewitharecordandplayprocedure.Newanalysismodelscan easily be implemented by the operator and added to the standard evaluation as ARAMIS offers a scripting interface.
All built-in features enable ARAMIS to:
• Integrateinexistingtestingandmeasuring workflows• Linkwithexistingevaluationstrategies• Adapttoanymeasuringandevaluationtask
Turn-key solution
AdidasSalomon•AirForce•Airbus•Aircelle•Alcan•Arcelor•ASICS•Audi•BAM•BASF•Bayer•Belgrade
University•BMW•Boeing•Bosch•Bridgestone•CanadianNationalResearchCouncil•ChinaSteel•CIDAUT•CNES
•Corning•Daimler•DLR•DTUCopenhagen•DuPont•EADS•EDAG•EMPA•Eurocopter•Exxon•FAA•Faurecia
•FIAT•FrauenhoferGesellschaft•GeneralMotors•GKSS•Goodyear•HenkelLoctite•Honda•HydroAluminium
•Hyundai•IBM•ILVA•IMA•ImperialCollege•IndianInstituteofTechnology•Infineon•IUC•JohnDeere•Korea
InstitiuteofMaterialsScience•KTHStockholm•LawrenceLivermoreNationalLaboratory•LFTErlangen•LGElectronics
•Magna•Max-Planck-Institut•McMasterUniversity•Microsoft•MTU•NASA•NorthropGrumman•Novelis•
ONERA•PCCL•PinturaEstampadoyMontaje•PohangUniversity•PolitechnikaWarszawska•PolitecnicodiBari•
PSA•Renault•RWTHAachen•SalzgitterMannesmannForschung•SamaraStateAerospaceUniversity•Samsung•
SandiaNationalLaboratories•SkodaAuto•SunMicrosystems•TechnicalUniversityofLiberec•TUDelft•TUDresden
•TUGraz•TUMünchen•UnionCollege•UniversityofLoughborough•UniversityofMichigan•Universityof
Stellenbosch•UniversityofTexas•UniversityBucharest•UniverzavMariboru•VäxjöUniversitet•Voest-AlpineStahl
•Volkswagen•VZLU•WichitaStateUniversity•ZFSachs
The“GesellschaftfürOptischeMesstechnik”(GOM)develops,producesanddistributesopticalmeasuringequipment for the three-dimensional coordinate measurement and deformation measurement of com po nents. The measuring systems are based on digital image processing and are used in material and component testing, product development and quality assurance.
All over the world, companies of the automotive, aviation and space industries, their suppliers and various manufacturersofconsumergoodsaswellasresearchfacilitiesuseGOMsystems.
GOMwasfoundedin1990asspin-offoftheTechnicalUniversityBraunschweig,Germany.ThecompanyownssubsidiariesinSwitzerland,France,GreatBritainandBelgium.Worldwide,morethan30committedandcompetentpartnersinstall,supportandmarketGOMproducts.
Today,GOMoffersacompletein-housesolutioncoveringhardware,software,technicalsupportandtrai ning.
Development, construction, support all in one
GOM customers (extract)
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AustriaWestcamDatentechnikGmbHPhone+435223555090office@westcam.at
Belarus, Russia, [email protected]
ChinaPro-TechnicMachineryLtd.Phone+85224282727atd@protechnic.com.hk
Croatia, SloveniaTopomatika [email protected]
Czech [email protected]
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JapanMarubeni Solutions [email protected]
Malaysia, [email protected]
MexicoCIM [email protected]
PakistanUltimateCADSolutionsLtdPhone+92515467572shakir@ucs-int.com
South AfricaRGCEngineeringPtyPhone+27115310766info@rgcengineering.co.za
SpainMetronic [email protected]
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GOM UK LtdBusinessInnovationCentreCoventry,CV32TXUnitedKingdomTel +442476430230Fax [email protected]