About

Resonic NDT SystemsResonic NDT Systems offers highly unique, innovative and patented quality control technology for non-destructive testing of all metals and some composites including exotic alloys, powdered metals and metal matrix composites.

Resonic NDT Systems instrumentation utilizes the patented process of Electro-Magnetic Acoustic Resonance (non-contact) to detect not only surface but subsurface defects & seams, porosity/inclusions, hardness/density changes, alloy identification, plating/cladding integrity and verification of size and/or thickness in as little as .003 seconds.

EMAR (Electro-Magnetic Acoustic Resonance) differs significantly from current Eddy Current and Ultrasonic NDT methods and offers the following advantages over these two methods:

  • Non-contact method produces an absolutely pure acoustic resonant response with high repeatability and stability.
  • Minimal “learning” required to determine out of compliance materials under test.
  • Either narrow band (localized) or broadband (wide) acoustic fields can be generated.
  • 100% cross sectional measurement:
    • small anomalies can be isolated anywhere in the cross section (surface and or subsurface).
    • entire components can be resonated and inspected for structural integrity.
  • Compact size and robust nature of the RM-EMAT (Resonance Mode Electro-Magnetic Acoustic Transducers) sensors enable easier placement into the production line with minimal materials handling equipment required.
  • Ability to generate and detect specific acoustic modes allows isolated inspection of only the target areas of non-conformance.

Also, unlike older technology such as RUS (Resonant Ultrasound Spectroscopy), EMAR operates at typically 1 to 15 MHz frequencies in a narrow bandwidth manner. The resonant acoustic field generated by the non-contact RM-EMAT can either be highly localized or “trapped” adjacent to the transducer or allowed to resonate an entire component. In short, EMAR can be “focused” to the task at hand.

Resonic NDT SystemsTo the user, Resonic NDT Systems represent:

  • Simplified Inspection
  • Tighter Quality Standards
  • Increased Production Capacity
  • Compliance to Customer Requirements
  • Improved Cycle Times
  • Enhanced Machine/Process Flexibility
  • Very Low Cost per Test
  • Fast Simple Payback
  • Highly Reliable & Repeatable

Applications for Resonic NDT Systems Electro-Magnetic Acoustic Resonance inspection:

Welded & Seamless Pipe & Tubing : Rod & Bar:
  • Outer diameter and inner diameter defects
  • Outer diameter and inner diameter dimensional verification
  • Hardness / annealing
  • Plating integrity
  • Paste or cold weld detection
  • Weld alignment
  • Delaminations
  • Surface and subsurface defects
  • Porosity and inclusions
  • Hardness / annealing
  • Alloy identification
  • Dimensional verification
Wire: Fasteners & Components:
  • Surface and subsurface defects
  • Porosity and inclusions
  • Hardness / annealing
  • Alloy identification
  • Cladding and plating integrity
  • Dimensional verification
  • Surface and subsurface defects
  • Porosity and inclusions
  • Hardness / annealing
  • Alloy identification
  • Dimensional verification
Sheet Metal: Powdered Metal:
  • Surface and subsurface defects
  • Hardness / annealing
  • Alloy identification
  • Plating integrity
  • Thickness measurement
  • Coating thickness and integrity
  • Texture / residual stress
  • Surface and subsurface defects
  • Porosity and inclusions
  • Uniformity verification

The first of three US Patents for this technology was issued in late 1998. Two additional patents have been recently issued with additional patents pending. Realizing the global market potential international patent filings are in process. These patents are under license to Resonic NDT Systems.

Technological development is continuing and additional IP filings will be pursued as this emerging technology continues to evolve. Patents in use by Resonic NDT include:

  • U.S. 5,808,202
  • U.S. 6,561,035
  • U.S. 10/437,363

(see also corresponding International Filings)

Resonic NDT Systems, Inc. was incorporated in June of 2004 to produce the patented Resonance Mode Electromagnetic Acoustic Transducer (RM-EMAT) and the Acoustic Resonant Inspection System (ARIS) product line. The ARIS system and testing technique are the result of more than a decade of research and development.

Resonic has a long history of research collaboration with NIST.






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