www.le.ac.uk/engineering asdec research centre in partnership with advanced structural dynamic...
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www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
ADVANCED STRUC TURAL DYNAMI C EVALUATI ON COLLOBORAT I VE RESEARCH CENT RE
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research CentreSpeaker:
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
University Facts and Figures• £268m turnover• Over 3700 staff• £500m of economic impact on
the regional economy• Over 23,000 Students • 8500 Postgraduates• Research Income >£50m pa• Spin outs and Licensing Deals
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
Everything Vibrates...
... the ear of a fly?
... a Stradivarius violin?
... a vehicle body?
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
Contact TransducersDisadvantages include:• Time consuming cabling• Coarse spatial resolution• Need to correct local coordinate system• Transducer calibration• Limited bandwidth• Overall, slow and cumbersome
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
Laser Doppler VibrometryA method of measuring surfaces• Non-contact• Can measure shape or
movement• Very rapid, so can be used for
measuring vibration
Analogy: acoustic Doppler effect
long wavelengthlow frequency
short wavelength high frequency
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
Why Non-contact LDV?• Light Has No Mass
– No additional damping – Direct surface measurements
• High Data Density– Measure complex structures
• Small and Large Objects– Small spot size– Large area scan capabilities
• Measure all materials– All types and textures, hot or cold
• Access– Through windows– Into vacuum or water tanks
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
3D Scanning Vibrometer• Full-field x-y scanning with 3 lasers
with common control• Laser beams intersect at surface• Shape geometry is imported or
measured • Simultaneous measurement of 3
vibration components
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
Vibration analysis
False colour shows vibration variances
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
Measurements with an Industrial Robot
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
ASDEC in action• Fixed Sensor arrangement• Optimum working distance• Automated measurement• Automated 3D-alignment
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
Deflection shape at 38 Hz
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
Robot Advantages• Fully automated & non-contact
vibration measurement• Benefits for deflection shape
and other tests:– Fast measurement– Non-contact – Very accurate
• Enables new tests– Higher point densities– Material testing
• Very fast and easy visualisation of results
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
Global Monitoring for Environment
and Security – G-STEP
Space IDEAS Hub
Additive Manufacturing
Ionic Liquids Demonstrator
RAFT (Real-time Air Fingerprinting Technology)
Biopolymers
Management Training Centre
Materials Technology Integration
Centre
NVH Graduate Pool
Airborne Sound
Analysis
Microscopy Centre
Graduate Internships
Feasibility Study Grants
Systems Modelling services
Masters level
Placements
Training / Master classes /
Distance learning
Consultancy
Research & Development
Engineering Services
Team
Core
ASDEC Services
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research Centre in partnership with
ADVANCED STRUC TURAL DYNAMI C EVALUATI ON COLLOBORAT I VE RESEARCH CENT RE
www.le.ac.uk/engineeringwww.le.ac.uk/asdec
ASDEC Research CentreThank you