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Polytec enhances scanning laser vibrometers

A Polytec product story
Edited by the Engineeringtalk editorial team Jun 18, 2009

The applications of Polytec's scanning laser vibrometers now include rotating objects such as cooling fans, turbine blades or tires under real operational conditions up to 24,00rev/min.

They also provide non-contact measurement of structures for modal analysis, finite element model validation and troubleshooting noise and vibration issues.

Sophisticated control electronics track the motion of the rotating object, resulting in a steady position of the laser beam on the test surface.

It will measure the deflection shapes and resonant frequency changes as a result of stiffening effects at high revolutions per minute.

The object appears to be at a standstill to the operator and the scanning vibrometer is, therefore, easy to set up and use to perform a measurement.

Polytec supplies a complete solution comprising the rotating unit with encoder input and an adjustable base frame for angular and height correction, a PSV-400 scanning vibrometer and a reference laser.

The optical de-rotator delivers high-quality input data for FEM validations and is a suitable troubleshooting tool for durability issues and acoustics challenges.

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