Thermal-pulse tomography of polarization distributions in a cylindrical geometry

Rosaura Flores Suárez, Axel Mellinger, Michael Wegener, Werner Wirges, Reimund Gerhard-Multhaupt, Rajeev Singh

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Fast, three-dimensional polarization mapping in piezoelectric sensor cables was performed by means of the novel thermal-pulse tomography (TPT) technique with a lateral resolution of 200 urn. The active piezoelectric cable material (a copolymer of polyvinylidene fluoride with trifluoroethylene) was electrically poled with a point-tocable corona discharge. A focused laser was employed to heat the opaque outer electrode, and the short-circuit current generated by the thermal pulse was used to obtain 3D polarization maps via the scale transformation method. The article describes the TPT technique as a fast non-destructive option for studying cylindrical geometries.

Original languageEnglish
Article number1714926
Pages (from-to)1030-1035
Number of pages6
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Issue number5
StatePublished - Oct 2006


  • Piezoelectric materials
  • Polarization profile
  • Polyvinylidene fluoride
  • Pyroelectric effect
  • Sensor cables
  • Thermal-pulse tomography


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