Mechanical performance analysis on miniature tiltmeter and design of a new oscillator suspended with thin reed spring

The torsion pole spring tiltmeter with small structure is introduced. Through the application of ANSYS software, the mechanical stress and mode analyses of pole spring oscillator are carried out, and the stress distributing graph and the vibration graphics for each order mode are given. The natural frequency of pole spring oscillator is studies theoretically and experimentally, which show that the experimental and theoretical results are almost consistent with the one obtained by ANSYS software. Moreover, the relationship between the sensitivity of tiltmeter and the structural dimension and shape of torsion pole oscillator has been analysed. A novel structure of oscillator suspended with two thin reeds is put forward and its mechanical stress and vibration modes are analysed .The results show that the sensitivity of tiltmeter can be improved and the cross-coupling error can be reduced, and besides the mechanical stability of instrument can be enhanced for the new structure.