Strain Sensors for High Field Pulse Magnets

  • Christian Martinez
  • Yan Zheng
  • Daniel Easton
  • Kevin Farinholt
  • Gyuhae Park
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)


In this paper we present an investigation into several strain sensing technologies that are being considered to monitor mechanical deformation within the steel reinforcement shells used in high field pulsed magnets. Such systems generally operate at cryogenic temperatures to mitigate heating issues that are inherent in the coils of nondestructive, high field pulsed magnets. The objective of this preliminary study is to characterize the performance of various strain sensing technologies at liquid nitrogen temperatures (-196oC). Four sensor types are considered in this investigation: fiber Bragg gratings (FBG), resistive foil strain gauges (RFSG), piezoelectric polymers (PVDF), and piezoceramics (PZT). Three operational conditions are considered for each sensor: bond integrity, sensitivity as a function of temperature, and thermal cycling effects. Several experiments were conducted as part of this study, investigating adhesion with various substrate materials (stainless steel, aluminum, and carbon fiber), sensitivity to static (FBG and RFSG) and dynamic (RFSG, PVDF and PZT) load conditions, and sensor diagnostics using PZT sensors. This work has been conducted in collaboration with the National High Magnetic Field Laboratory (NHMFL), and the results of this study will be used to identify the set of sensing technologies that would be best suited for integration within high field pulsed magnets at the NHMFL facility.


Fiber Bragg Grating Structural Health Monitoring Cryogenic Temperature Pulse Magnet Strain Sensor 
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Copyright information

© Springer Science+Businees Media, LLC 2011

Authors and Affiliations

  • Christian Martinez
    • 1
  • Yan Zheng
    • 2
  • Daniel Easton
    • 3
  • Kevin Farinholt
    • 4
  • Gyuhae Park
    • 4
  1. 1.Dept. of Mechanical EngineeringRice UniversityHoustonUSA
  2. 2.Dept. Civil EngineeringGeorgia Institute of TechnologyAtlantaUSA
  3. 3.Atomic Weapons Establishment plcAldermastonUK
  4. 4.Engineering InstituteLos Alamos, National LaboratoryLos AlamosUSA

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