To help explain the Resonant Acoustic Method (NDT-RAM), let’s consider how a person can determine between a good bell and a cracked bell .
Impact the Part
The part can either be impacted with a manual hammer or an industrial electric hammer. It is important to excite the part with a proper, repeatable force. This will improve the repeatability and reliability of the test.
Measure the Response
A microphone is used to provide accurate acoustic measurement of the component's resonant frequency and amplitude values. The NDT microphone provides a perfect fit of price, accuracy and dependability.
Process the Data and Quantify the Results
Changes in mass, stiffness and damping due to certain defects can cause...
- resonant frequency peaks to shift in both frequency and amplitude.
- resonant frequency peaks to shift frequency but maintain amplitude.
- peak shifts with more pronounced splits in resonant frequency.
- resonant frequency peak energy to disappear completely.
The family of NDT-RAM systems range from a portable manual system ideal for parts investigation and troubleshooting, to a semi-automated system for easy integration into your existing process, to a fully automated conveyor-based or drop test fixture system
as a turn-key solution for 100% parts inspection.