GOM Optical Measuring Techniques. Deformation Systems and Applications

Transcription

1 GOM Optical Measuring Techniques Deformation Systems and Applications

2 ARGUS Forming Analysis

3 ARGUS Deformation analysis in sheet metal and forming industry Forming Characteristics of Sheet Metals Material deformation analysis Detection of critical forming areas Localization of overstretched areas prior to visible cracks Verification and improvement of forming simulations Fast improvement of forming tools in tryout phase Adjusting the tool parameters (Binders, dies, support plates) Changes in tools Pagina 3

4 ARGUS Workflow Specimen preparation: Marking with dot pattern 1mm, 2mm, 3mm Point distance Dots applied by Electro-chemical etching Laser marking Photogrammetric measurement Pagina 4

5 ARGUS Results: 3D coordinates of all dots Major and Minor strain Material thickness reduction Forming Limit Diagram FLD Sections Coordinate transformations Comparison to CAD Comparison to FEA User defined export Pagina 5

6 ARAMIS Principle

7 ARAMIS Material and Component Testing 3D Deformation Analysis 3D deformation measurement Determination of material properties Component testing Flexibility for all applications Standard applications, e.g. tensile tests, High temperature measurements High speed measurements Validation of FE simulation Real-Time measurements Integration in existing testing environment Tensile testing devices, load frames, Replacement for extensometers and strain gauges Pagina 7

8 ARAMIS Theoretical Basics Strain Definition Strain Values Longitudinal Strain: ε = L L 0 y L 0 Transversal Strain: ε = B B 0 x B 0 Pagina 8

9 ARAMIS Theoretical Basics Measurement Methods Global Strain Measurement Length Measurement One Strain Value for homogeneous Strain Distributions Local Strain Measurement Strain Gauge One Strain Value for local Strain Distribution ARAMIS Strain Measurement Global and Local Measurement Measurement Points Pagina 9

10 ARAMIS 3D Deformation Measurement Applications Material Testing Component Testing Examination of non-linear Behavior Characterization of Creep and Aging Processes Determination of Forming Limit Curves (FLC) Validation and improvement of Finite Element Analysis Pagina 10

11 ARAMIS Workflow Pattern applied on the specimen Stochastic or deterministic Pattern follows the deformation of the specimen Image acquisition Image processing Undeformed Specimen Deformed Specimen Pagina 11

12 ARAMIS Workflow Pattern applied on the specimen Image acquisition Image processing 3D coordinates 3D displacements and velocity Strain tensor Results 3D visualization Sections in 2D diagram Forming Limit Diagrams Statistics, exports Advanced post processing Pagina 12

13 ARAMIS Application FEA Comparison General workflow for the FEA Comparison Import of FEA results Import filter integarted 3D coordinate system alignment Best-fit or Manual registration Calculation of surface (geometry) deviations Mapping of the FEA points to the measurement points Points from FEA have different positions in 3D space Calculation of differences between FEA and measurement Pagina 13

14 PONTOS Dynamic Deformation Analysis

15 PONTOS Dynamic Deformation Analysis Dynamic Analysis of 3D Coordinates Real-time deformation analysis through online measuring and evaluation Deformation (Torsion, bending, displacement, etc.) Velocity Acceleration Analysis of vibration Dynamic behavior of components Deformation in wind canal Drop tests Door slam tests Structural vibrations Pagina 15

16 Position, Movement, Deformation Example: Displacement Sensor Setup (Displacement Sensor): Reference Frame Mounting the Sensor Wire up Sensor Data Acquisition Data Analysis Reference Reference Reference Reference Data Acquisition Reference Reference Only 1D Pagina 16

17 Position, Movement, Deformation Example: Displacement Sensor Setup (Displacement Sensor): Reference Frame Mounting the Sensor Wire up Sensor Data Acquisition Data Analysis Imagine a 3D setup Pagina 17

18 Position, Movement, Deformation Example: Displacement Sensor Setup (Displacement Sensor): Setup (Optical Displacement Sensor): Reference frame no longer necessary Mounting the sensor Application of a measurement point Data acquisition Optical Measurement System Pagina 18

19 PONTOS: The Simplicity of Measuring Dynamic Deformations PONTOS System Setup Setup of System 5min Calibration 9min Pagina 19

20 PONTOS: The Simplicity of Measuring Dynamic Deformations PONTOS Preparation of Object Application of Markers Installation of Trigger Signal Light Gate Pre Trigger 16min Pagina 20

21 PONTOS: The Simplicity of Measuring Dynamic Deformations PONTOS Evaluation and Analysis Measurement Reference Stage (Closed Door) Dynamic Measurement e.g. 500 fps Evaluation Compute Stages Definition of Components Identification 22min Pagina 21

22 PONTOS: The Simplicity of Measuring Dynamic Deformations PONTOS Evaluation and Analysis Measurement Reference Stage (Closed Door) Dynamic Measurement E.g. 500 fps Evaluation Compute Stages Definition of Components Identification Definition of Coordinate System Compensation of Rigid Body Motion Analysis Point Position 6DoF Easy Reporting 30min Pagina 22

23 PONTOS Dynamic Deformation Measurement Advantages Simple Specimen Preparation Ultra-light Measurement Targets Frame Rates independent of the Number of Markers Customized Triggering of the Image Acquisition Recording of Analog Signals Insensitive to ambient Conditions, such as Vibrations and Light Changes Easy Adjustment to different Measurement Areas and Tasks Results 3D Coordinates 3D Displacement Deformations Velocity Acceleration Pagina 23

24 TRITOP Deformation

25 TRITOP Position Movement Deformation 3D Deformation Analysis Static measurement Position Displacement Deformation Pagina 25

26 TRITOP Deformation Static measurement of mechanical and thermal deformation Measurement of mechanical and thermal deformation Quick and easy Measurement process High precision and repeatability Thermal stability of Measurement targets Pagina 26

27 TRITOP Deformation Visualization Displacement Measurement of Reference targets by the use of movement vectors Online tracking of 3D coordinates Movement analysis Deformation analysis CAD-Data (Import, Registration) Visualization of results on the camera images Result presentation Displacement Fields, Diagrams, Image series, reports Pagina 27

28 TRITOP Deformation Measurement of mechanical load Misuse test: Door with attached weight of 10kg Inspection of the door hinge under load Closure behavior after load Test according to function and opening angle Opening behavior Visualization on CAD data Deformation in Z direction Pagina 28

29 Grazie! Walter Di Renzo