Abstract
The conventional magnetoelastic resonant sensor suffers from a low detecting sensitivity problem. In this study, an hourglass-shaped magnetoelastic resonant sensor was proposed, analyzed, fabricated, and tested. The hourglass-shaped magnetoelastic resonant sensor was composed of an hourglass and a narrow ribbon in the middle. The hourglass and the narrow ribbon increased the detection sensitivity by reducing the connecting stress. The resonant frequency of the sensor was investigated by the finite element method. The proposed sensor was fabricated and experiments were carried out. The tested resonance frequency agreed well with the simulated one. The maximum trust sensitivity of the proposed sensor was 37,100 Hz/strain. The power supply and signal transmission of the proposed sensor were fulfilled via magnetic field in a wireless and passive way due to the magnetostrictive effect. Parametric studies were carried out to investigate the influence of the hourglass shape on the resonant frequency and the output voltage. The hourglass-shaped magnetoelastic resonant sensor shows advantages of high sensitivity, a simple structure, easy fabrication, passiveness, remoteness, and low cost.
Highlights
The magnetoelastic material has been widely used in the field of sensors since its emergence
These sensors are based on different effects of the magnetoelastic material
Frequency sensitivity is a key parameter of resonant magnetoelastic sensors [8,9,10,11,12,13]
Summary
The magnetoelastic material has been widely used in the field of sensors since its emergence. These sensors are based on different effects of the magnetoelastic material. Was developed based on the magnetoelastic material in 2018 Among of these new sensors, resonant magnetoelastic sensors show advantages in chemical and force detecting fields due to its remoteness and passiveness characteristics [7]. Frequency sensitivity is a key parameter of resonant magnetoelastic sensors [8,9,10,11,12,13]. Lots of studies have focused on this research area
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