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Interaction and Multiscale Mechanics
  Volume 3, Number 3, September 2010, pages 257-266
DOI: http://dx.doi.org/10.12989/imm.2010.3.3.257
 
open access

Design and simulation of resonance based DC current sensor
B.V.M.P Santhosh Kumar, K. Suresh, U. Varun Kumar, G. Uma and M. Umapathy

 
Abstract
    A novel resonance based proximity DC current sensor is proposed. The sensor consists of a piezo sensed and actuated cantilever beam with a permanent magnet mounted at its free end. When the sensor is placed in proximity to a wire carrying DC current, resonant frequency of the beam changes with change in current. This change in resonant frequency is used to determine the current through the wire. The structure is simulated in micro and meso scale using COMSOL Multi physics software and the sensor is found to be linear with good sensitivity.
 
Key Words
    cantilever beam; resonant sensor; current sensor; proximity sensor; magnetic force.
 
Address
B.V.M.P Santhosh Kumar, K. Suresh, U. Varun Kumar, G. Uma and M. Umapathy: Dept. of Instrumentation and Control Engineering, National Institute of Technology, Tiruchirappalli . 620 015, India
 

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