Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20128
Title: Direct current force sensing device based on compressive spring, permanent magnet, and coil-wound magnetostrictive/piezoelectric laminate
Authors: Leung, CM
Or, SW 
Ho, SL 
Issue Date: 2013
Publisher: American Institute of Physics
Source: Review of scientific instruments, 2013, v. 84, no. 12, 125003 How to cite?
Journal: Review of scientific instruments 
Abstract: A force sensing device capable of sensing dc (or static) compressive forces is developed based on a NAS106N stainless steel compressive spring, a sintered NdFeB permanent magnet, and a coil-wound Tb0.3Dy0.7Fe 1.92/Pb(Zr, Ti)O3 magnetostrictive/piezoelectric laminate. The dc compressive force sensing in the device is evaluated theoretically and experimentally and is found to originate from a unique force-induced, position-dependent, current-driven dc magnetoelectric effect. The sensitivity of the device can be increased by increasing the spring constant of the compressive spring, the size of the permanent magnet, and/or the driving current for the coil-wound laminate. Devices of low-force (20 N) and high-force (200 N) types, showing high output voltages of 262 and 128 mV peak, respectively, are demonstrated at a low driving current of 100 mA peak by using different combinations of compressive spring and permanent magnet.
URI: http://hdl.handle.net/10397/20128
ISSN: 0034-6748
EISSN: 1089-7623
DOI: 10.1063/1.4838615
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