HIGH SENSITIVITY FIBRE OPTIC VIBRATION SENSING DEVICE

摘要

A vibration sensing device, an acceleration sensing system and a method of manufacturing a vibration sensing device are disclosed. The vibration sensing device comprises a flexible disk that is mounted symmetrically about a radial plane and has a mass located on the disk substantially symmetrically about this radial plane which exerts a force that is greater towards the edge than it is towards the centre of the disk. The vibration sensing device is thereby sensitive to on-axis signals and insensitive to cross axis signals.