Noise detector spots other faults

Noise and vibration analysis techniques used as a foolproof method to detect and analyse faults in vehicle brake linings could have wider quality control applications. Diagnostic Instruments, which developed the LineCheck push-button instrument, says the same technology can be used for quality control, even on automated production lines. LineCheck is used in the automotive industry […]

Noise and vibration analysis techniques used as a foolproof method to detect and analyse faults in vehicle brake linings could have wider quality control applications.

Diagnostic Instruments, which developed the LineCheck push-button instrument, says the same technology can be used for quality control, even on automated production lines.

LineCheck is used in the automotive industry to analyse faults such as changes in the density of the composite material in brake linings or failure of the material to bond to the steel substrate.

Similar equipment would be effective in highlighting cracks in turbine blades or rubbing in the windings of an electric motor.

The cause can also be identified using sound analysis techniques and the results are more accurate than simply relying on the human ear.

LineCheck uses signature feature extraction (SFX) technology developed by Diagnostic Instruments, which is based on fast Fourier transform methods of analysing sound and vibration waveforms.

An instrument set up with the characteristics of a product will identify pattern shifts in the faulty product. The pass or failure rate can be altered by the user.