Details

Autor(en) / Beteiligte

• Zhuang, X.
• Lam Chok Sing, Marc
• Dolabdjian, C.
• Wang, Y.
• Finkel, P.
• Li, J.
• Viehland, D.

Titel

Mechanical noise limit of a strain coupled magneto(elasto)electric sensor operating under a magnetic or an electric field modulation

Ist Teil von

• IEEE sensors journal, 2014

Ort / Verlag

Institute of Electrical and Electronics Engineers

Erscheinungsjahr

2014

Quelle

IEEE Xplore

Beschreibungen/Notizen

• The mechanical noise limit of a strain coupled Magneto(elasto)Electric (ME) composite has been investigated when a magnetic or an electric field modulation is applied to sense a low frequency magnetic field and access DC field measurement capabilities. The sensitivity and noise of such a composite sensor was derived from constitutive equations based on the piezoelectric and ferromagnetic material properties. The analysis was used to evaluate the equivalent noise floor of the composite sensor and to explain the origin of noise by constituting a mechanically coupled electromagnetic model. Experimental measurements revealed a good fit with the proposed model. For example, an equivalent magnetic noise level of ~ 60 pT/Hz @ 1Hz with DC capability was achieved by using an appropriate field modulation.