A new angular velocity sensor with ultrahigh resolution using magnetoelectric effect under the principle of Coriolis force

This paper proposes a novel angular velocity sensor by using magnetoelectric material for detecting permanent magnet reciprocating motion subjected to the principle of Coriolis force. In this research, we realize the magnetoelectric effect based upon the combination of a giant magnetostrictive material and a piezoelectric material. A general mathematical model is developed with the accepted assumptions to determine the relationship between the input angular velocity and the output voltage by using harmonic balance method. Through both theoretical and preliminary experimental study, we figure out a regime of achieving ultrahigh resolution angular velocity through carrying out maximum and most sensitive Coriolis force by applying optimal excitation frequency for permanent magnet vibration. According to simulation analysis, the achieved rotating resolution of the new mechanism may reach up to 0.001°/s. This new mechanism has remarkable potential for measuring rotations of ultra-low angular velocity. Experiments have been done on a prototype and the conception is validated by the results.