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Full Matrix Capture

Full matrix capture
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Full matrix capture (FMC) is a data acquisition strategy that allows for the capture of every possible transmit-receive combination for a given ultrasonic phased array transducer.

Acquired data is processed in real-time using an optimised version of the total focusing method (TFM) algorithm which generates fully focused images from the FMC data. This new technique aims to increase the reliability of ultrasonic inspection, leading to reduced costs and improved safety for industry.

TWI has been researching and developing full matrix capture technology for a number of years, and it is now at the stage where it is ready for industrial testing, validation and uptake.

Benefits of full matrix capture

  • Fully focused images
  • High sensitivity to small flaws
  • High resolution
  • Signal-to-noise levels equivalent to phased array
  • Real-time inspection
  • Ease of inspection setup as no complicated focal laws involved
  • Ease of interpretation

Current technology

  • TWI Crystal full matrix capture software
  • Real-time imaging through advanced software optimisation and parallelisation of the TFM algorithm
  • Weld geometry inspection (B-scan, C-scan and D-scan display)
  • Anisotropic CFRP material inspection with compensation for velocity variations
  • Calibration of inspection sensitivity allowing a uniform amplitude response throughout the region of interest
  • Real-time inspection through arbitrary complex geometries
  • Hybrid phased array/TFM technique for rapid inspection (100+ frames per second) using large arrays and for thick-section components
  • Dynamic Link Library (.DLL) for integration into third-party software packages

Future technology

  • Validation through PoD study and sectioning
  • Ongoing support and improvements for TWI Crystal
  • Self tandem capability for vertically aligned through-wall planar flaws in weld geometries
  • Inspection using transmit-receive longitudinal transducers for highly attenuating materials
  • 2D arrays for inspection of components with limited surface access

Please email, contactus@twi.co.uk for more information.

This research is being undertaken at our Technology Centre in Wales. For more information about the Centre, please click here.

For more information please email:


contactus@twi.co.uk