DISPOSITIVO DETECTOR DE VIBRACIONES

摘要

A vibration sensing device comprising a vibration sensor forming part of an electrical circuit suspended by a pendulous support provided by a pair of electrically conductive suspension plates. The vibration sensor comprises an electrically conductive inertia mass supported on supports in the suspension plates. The combined inertia of the sensor and the suspension plates is such that high energy vibrations cause the suspension plates and the sensor to oscillate, while low energy vibrations do not. Accordingly, only low energy vibrations cause the inertia mass to lift off the supports to open and close the electrical circuit. Thereby the vibration sensing device is only responsive to low energy vibrations.