Determining material parameters in a non-destructive way
Material properties are determined with zero contact using laser vibrometers. Conclusions can be drawn as to a material sample’s strength by determining the resonance frequency during broadband excitation. This method is used to ensure quality when manufacturing different building materials, since it is completely non-destructive. Often expensive test objects can be saved, and it can also be easily automated.
Polytec Magazine
Of colors and shapes
Vibration analysis helps to protect art
Construction material requiring non-invasive testing
Knowledge of the temporal and local changes to the material properties of cement-bonded systems is vitally important for both materials research and for planning and implementing construction projects. The material properties can be described using ultrasound parameters. Cement-bonded building materials have a high ultrasonic wave absorption capacity straight after mixing, as well as a low sound velocity. Depending on how structure development progresses, the sound velocities and signal amplitudes then increase continuously. The surface’s ultrasound-induced deflection is recorded with zero contact using laser vibrometers. Calculating Young’s modulus and Poisson’s ratio – the elastic variables – also allows for a more extensive assessment of the materials inspected.
Related products
PSV QTec Scanning Vibrometer
PSV QTec Scanning Vibrometers take full-field vibration mapping to the next level with unrivalled optical sensitivity! Their innovative, patented QTec® technology uses multi-path interferometry based on infrared (SWIR) laser granting high-fidelity measurements on all surfaces from DC to 25 MHz. PSV QTec significantly reduce testing time - especially on dark, biological, rotating or moving objects, determining operational deflection shapes and Eigenmodes for NVH, acoustics, structural dynamics, ultrasonics, FEM validation and NDT.
VibroFlex
With the modular laser vibrometer VibroFlex, Polytec presents the superior flexibility in optical vibration measurement with a modular sensor solution up to 24 MHz that adapts to your needs: Add microscope objectives for observing tiny structures or measure large samples like machinery or motors from a safe distance. Discover acoustics and vibration phenomena in research and product development for a faster time-to-market or use it for reliable in-line inspections. Learn about how the patented multi-path interferometry QTec® provides an always stable signal level, 20 dB better SNR for faster and clearer results without post-processing.
