Open-Source Multi-Sensor Eddy Current Database for Non-Destructive Characterization of Carbon Fiber Structures

This dataset contains 738 multi-frequency eddy current scans of carbon fibre structures (CFRP) composite specimens, acquired with the EddyCus® Integration Kit 
(Fraunhofer IKTS, Dresden). All scans are provided in structured HDF5 format with full 
measurement metadata, material properties, and defect labels.

The dataset is intended for non-destructive testing (NDT) research, machine learning 
benchmarking, sensor comparison studies, and fibre orientation analysis of composite 
materials.

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SENSORS

Absolute sensors:
  S13131 — 7.3 MHz, 3.3 mm coil
  S13132 — 6.1 MHz, 5.8 mm coil
  S22329 — 18.1 MHz, 3.3 mm coil

Differential (half-transmission) sensors:
  S14150 — 9.2 MHz, 5.8 mm coil, 6.3 mm spacing
  S14152 — 24.3 MHz, 3.3 mm coil, 3.5 mm spacing
  S15172 — 8.5 MHz, 2.4 mm coil, 2.4 mm spacing
  S17257 — 17.0 MHz, 7.0 mm coil, 7.0 mm spacing
  S22330 — 6.5 MHz, 2.4 mm coil, 2.4 mm spacing

All sensors manufactured by Fraunhofer IKTS, Dresden.

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MATERIAL SYSTEMS

The base textiles are primarily of 
three different types and all consist of high tenacity carbon fibers: (i) A commercially available unidirectional non-crimp fabric made off individual 50 K rovings, which are bonded together
by a polyester stitch yarn (HP-U300/122C by HP-Textiles GmbH, Schapen, Germany). 
(ii) A  commercially available unidirectional non-crimp fabric made off 50 K CF rovings, which were spread to form a more homogeneous 
fabric and bonded by an adhesive thread grid (Carbon fiber non-crimp fabric ST 50 g/m² by R&G Faserverbundwerkstoffe GmbH, 
Waldenbuch, Germany). 
(iii) Carbon fiber non-crimp fabrics produced at the Institute of Textile Technology and High Performance Material
Technology (ITM) of TUD Dresden University of Technology. These were produced on the basis of 12 K fibers 
(HTS40 12K, Toho Tenax Europe GmbH, Wuppertal, Germany) on the 
institute’s Malitronic Multiaxial Stitch Bonding Machine.

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DEFECT CATEGORIES

  Reference — no defect                       84 scans
  Gap (missing rovings)                         492 scans
  Layer with false orientation                 80 scans
  PTFE film insert                                    24 scans
  Copper film insert                                24 scans
  Copper coated roving inserted    &nbs