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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)

Abstract

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.

Keywords

Fiber Bragg Grating Structural Health Monitoring Cryogenic Temperature Pulse Magnet Strain Sensor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Sims, J.R., Rickel, D.G., Swenson, C.A., Schillig, J.B., Ellis, G.W., and Ammerman, C.N., “Assembly, Commissioning and Operation of the NHMFL 100 Tesla Multi-Pulse Magnet System” in IEEE Trans. Appl. Supercond., vol. 18, NO. 2, June 2008 Google Scholar
  2. 2.
    Sims, J.R., Schillig, J.B., Boebinger, G.S., Coe, H., Paris, A.W., Gordon, M.J., Pacheco, M.D., Abeln, T.G., Hoagland, R.G., Mataya, M.C., Han, K., and Ishmaku, A., “The U.S. NHMFL 60 T Long Pulse Magnet Failure” in IEEE Trans. Appl. Supercond., vol. 12, no. 1, March 2002.Google Scholar
  3. 3.
    Swenson, C.A., Gavrilin, A.V., Han, K., Walsh, R.P., Schneider-Muntau, H.J., Rickel, D.G., Schillig, J.B., Ammerman, C.N., and Sims, J.R., “Performance of 75 T Prototype Pulsed Magnet” in IEEE Trans. Appl. Supercond., vol. 16, no. 2, June 2006 Google Scholar
  4. 4.
    Evans, J. E., Dulieu-Barton, J.M., Burguete, R.L., “Electrical Resistance Strain Gauges,” Modern Stress and Strain Analysis, pp. 4,5. 2009.Google Scholar
  5. 5.
    Evans, J. E., Dulieu-Barton, J.M., Burguete, R.L., Optical Fibre Bragg Grating Strain Sensors,” Modern Stress and Strain Analysis, pp. 2,3. 2009.Google Scholar
  6. 6.
    Kashyap, R., “Fiber Bragg Grating Band-Pass Filters” in Fiber Bragg Grating, no. 2 pp. 237–245, 2004.Google Scholar
  7. 7.
    Park, G., Farrar, C.R., Rutherford, A.C., Robertson, A.N., “Piezoelectric Active Sensor Self- Diagnostics Using Electrical Admittance Measurements” Journal of Vibration and Acoustics AUGUST 2006, Vol. 128 / 469Google Scholar
  8. 8.
    Saint-Pierre, N., Jaye, Y., Perrissin-Fabert, I., and Baboux, J. C., “The influence of bonding defects on the electric impedance of a piezoelectric embedded element,” Journal of Physics D: Applied Physics 29, pp. 2976–2982, December 1996.CrossRefGoogle Scholar
  9. 9.
    9.Giurgiutiu, V., Zagrai, A. N., “Embedded self-sensing piezoelectric active sensors for on-line structural identification,” Transactions of the ASME 124, pp. 116–125, January 2002.Google Scholar
  10. 10.
    10.Pacou, D., Pernice, M., Dupont, M., and Osmont, D., “Study of the interaction between bonded piezoelectric devices and plates,” in 1st European Workshop on Structural Health Monitoring, (155), 2002.Google Scholar
  11. 11.
    11.Bhalla S., and Soh, C.K., “Electromechanical impedance modeling for adhesively bonded piezotransducers,” Journal of Intelligent Material Systems and Structures 15, pp. 955–972, December 2004.CrossRefGoogle Scholar
  12. 12.
    12.Park, G., Farrar, C. R., di Scalea, F. L., and Corria, S., “Performance assessment and validation of piezoelectric active-sensors in structural health monitoring,” Smart Materials and Structures 15, pp. 1673–1683, December 2006.CrossRefGoogle Scholar

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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