Abstract
A differential heterostructure design which has a capability to reduce the internal noise and reject the external vibration noise for Metglas magnetostrictive foils/Pb(Zr, Ti)O3 piezofiber based-magnetoelectric (ME) laminated composite has been studied. The internal noise reduction is equivalent to that offered by sensor array stacks, and the external noise cancellation is based on a differential method (i.e., ME signal is in-phase but vibration noise is anti-phase). The ability of the structure to reduce the internal noise, and cancel the external vibration noise by a 10-fold attenuation factor, allows for practical applications of these sensors in real-world environments where contamination of magnetic signals by external vibrational noise increases the equivalent magnetic noise.
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