Mass Load Distribution Dependence of Mass Sensitivity of Magnetoelastic Sensors under Different Resonance Modes

Sensors

Kewei Zhang¹  Lin Zhang²  Yuesheng Chai¹ 

[1] School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China; E-Mail:;Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA; E-Mail:

关键词: magnetoelastic sensor;    mass sensitivity;    resonance mode;    mass load distribution;   

DOI  :  10.3390/s150820267

来源: mdpi

【 摘 要 】

Magnetoelastic sensors as an important type of acoustic wave sensors have shown great promise for a variety of applications. Mass sensitivity is a key parameter to characterize its performance. In this work, the effects of mass load distribution on the mass sensitivity of a magnetoelastic sensor under different resonance modes were theoretically investigated using the modal analysis method. The results show that the mass sensitivity and “nodal point” positions are related to the point displacement, which is determined by the motion patterns. The motion patterns are affected by resonance modes and mass load distribution. Asymmetrical mass load distribution causes the motion patterns lose symmetry and leads to the shift of “nodal point”. The mass sensitivity changing with mass load distribution behaves like a sine wave with decaying amplitude and the minimum mass sensitivity appears at the first valley. This study provides certain theoretical guidance for optimizing the mass sensitivity of a magnetoelastic sensor or other acoustic wave based sensors.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.