Acoustic Resonance Testing (ART)
Hear cracks before they break.
The method in one sentence.
Acoustic resonance testing (ART) is a non-destructive testing (NDT) method for economical 100 % inspection in series production – on sintered, cast, forged and ceramic parts. Cracks, voids, microstructure flaws, material mix-ups, sintering grade and hardness distribution measurably alter the natural vibration behaviour and thus become detectable without damaging the part. RTE has used the method in series production for more than 20 years.
How does it work?
A broadband excitation – by impulse hammer, manual or automatic, or by loudspeaker – makes the part ring. A microphone or accelerometer captures the response. SonicTC.AT computes the frequency spectrum, identifies the natural frequencies and compares them against a reference master or an ML classifier – near-surface defects such as cracks as well as volumetric ones such as voids.
Typical applications
- Crack detection on brake discs, sintered rings, cast parts
- Voids and microstructure defects in the part volume
- Material mix-ups in incoming goods inspection
- Sorting by sintering grades
- Hardness distribution on roller bearing components
- 100 % testing with cycle times below one second
Related module
100 % tested. 0 % destroyed.
Ready to experience acoustic test technology in your line?
Send us your part or schedule an online demo. First assessment within 24 hours.