| 摘要 |
<p>A sensor comprises an optical fibre having light-to-mechanical strain transducer means formed integrally therewith for responding to the propagation of modulated light along said optical fibre to drive the optical fibre or part thereof into mechanical resonance. The value of an external parameter influencing the sensor (e.g. temperature, tension, pressure) is determined by monitoring characteristics (e.g. phase or intensity) of the light output from the sensor which are indicative of the effects of the vibration of the sensor on the light propagating therethrough. In one form, as shown, the optical fibre 1 has a light-propagative core 4 and a light-absorbtive region 2 within cladding 3. Optical fibres of quite different cross-sectional configurations are also contemplated and various mounting arrangements are disclosed. <IMAGE></p> |
