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Design of Beam Surface Displacement Sensors

[+] Author Affiliations
Rohan Thomas, Marcellin Zahui

University of North Dakota, Grand Forks, ND

Paper No. IMECE2014-38389, pp. V04BT04A016; 6 pages
doi:10.1115/IMECE2014-38389
From:
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 4B: Dynamics, Vibration, and Control
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4648-3
  • Copyright © 2014 by ASME

abstract

PolyVinyliDene Fluoride (PVDF) film is used in this work to develop surface displacement sensors for vibrating simply supported, clamped, and cantilever beams. The constant shape PVDF film is bonded to the surface of the beam spanning the entire beam length. Bands parallel to the width of the beam are etched on the film to create multiple separate sections of the sensor. The individual output charge of the sensor sections is proportional to the slope of the beam lateral displacement curve of that patch. The actual beam surface displacement curve is calculated from these slopes. Theoretical analysis and numerical simulation show that the proposed sensor can be used to effectively measure the lateral vibration displacements of prismatic beams with various boundary conditions. However the accuracy of the measurement is closely related to the number of sensor sections and thus, relatively large number of channels is required for accurate measurements.

Copyright © 2014 by ASME

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