As the position of the magnetoelastic ribbon relative to the coil has a certain influence on the detecting result

different positions of the magnetoelastic ribbon in the coil are experimentally studied. The experimental results show that the resonant frequency of the magnetoelastic ribbon in the middle of the coil is significantly smaller than the resonant frequency of the magnetoelastic ribbon at the ends of the coil

and the difference of the resonant frequency can reach 0. 9 kHz

which means the positon have a significant effect on the detecting result.The resonance frequency shift caused by mass has a linear relationship with the fundamental frequency of the sensor. Therefore

when the fundamental frequency is high

the sensitivity of the sensor is high.