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Scanning Laser Doppler Vibrometer.
Noise and vibration measurement specialist, Brüel & Kjaer
has introduced the new state-of-the-art Ometron Scanning
Laser Doppler Vibrometer (SLDV) Type 8330, a non-contact
vibrometry system that offers key advantages over traditional
methods which use surface-mounted vibration transducers.
SLDV Type 8330 is a highly accurate, compact and versatile, non-contact
vibration measurement system for use in applications where it is
impossible or undesirable to mount an array of accelerometers on a
vibrating object. It is a full-field system that can quickly produce vibration
maps depicting the structural response at multiple measurement points.
In such applications, Type 8330 can save a great deal of time and
produce more reliable results.
The SLDV's operation is based on a homodyne principle that otters
a very high optical sensitivity and accuracy. The SLDV also features,
in a single set-up, the ability to quickly measure multiple points with
high spatial resolution, significantly reducing set-up and measurement
Type 8330 is a complete turnkey solution whose low weight and
compact design make it suitable for both laboratory and field work.
The system comprises just a sensor head and a PC. The PC is
supplied pre-configured with a comprehensive data acquisition
and analysis software package.
The scanning laser principle provides a very versatile means of
data acquisition that can be applied to a wide variety of applications
- industrial, medical, military and civil. These encompass experimental
modal analysis, determination of operational deflection shapes and
detection of structural defects, amongst many others. The SLDV
can be applied to practically all types of vibration measurement.
The new SLDV Type 8330 is a full-field system capable at producing
vibration maps depicting structural response in very short periods
of time. The software can control a vibration exciter and display the
resulting structural response. Offering broadband input excitation
to the structure under test, Type 8330 is ideal for applications
such as operating machinery inspection, structural integrity
assessment studies, analytical modelling, validation of FE
(finite element) models, noise control, non-destructive inspection,
quality assurance, condition monitoring, design studies and
production assembly techniques, etc.
Specifications include maximum vibration velocity of 2000mm/s
in five ranges (5, 20, 100, 500 and 2000mm/s), sensor vibration
frequency range of <0.1Hz to 200kHz up to 100mm/s and <0.1Hz
to 2MHz up to 2000mm/s, working distance >200m (depending
on surface finish) and spatial resolution of 1mm at 20m working
The versatility of the Type 8330 is enhanced by its simple and
user-friendly operator interface, its portability and its tolerance to
a number of otherwise difficult measuring conditions. This enables
the Type 8330 to be set up to produce accurate, reliable and
consistent data that can be swiftly interpreted and used in the
engineering decision making process.
Features include wide dynamic range, digital mirror drive control,
high resolution mirror angle positioning (16bit), full colour CCD
camera image for background "wallpaper", dropout detection for
fast re-scanning of positions with low S/N ratio, compact design
with all electronics and optics in one unit, unique built-in
self-diagnostic tools and easy interface to modal analysis and
operation deflection shapes software packages.
Type 8330 has evolved through Bruel & Kjaer's alliance with Ometron,
leading world-wide supplier and pioneer of non-contact vibration
and stress measurement equipment. Bruel & Kjaer has the exclusive
rights to sell SLDV Type 8330 world-wide.
More information from:
Bruel & Kjaer, Bedford House, Rutherford Close,
Stevenage, Hertfordshire, SG1 2ND. UK
Tel: +44(0) 1438 739000, Fax: +44(0) 1438 739099
Web site: www.bksv.com