Design of the Electrodynamic Seismic Sensor With Two Mechanic Oscillation Circuits

Electrodynamic seismic sensors are used mainly for seismological research. To improve the functionality, the authors modeled the seismic sensor with two free frequencies in the operating band. The authors are going to use seismic sensors as a part of portable security or monitoring systems because they don't need external power for their performance. The solid model of the seismic sensor with two mechanic oscillation circuits is presented. The frequency response of an output signal in a steady-state mode is calculated. Design and simulations of planar springs are presented. The influence of the deviation of the vibration direction from the axis of the device was modeled and estimated.