| 摘要 |
Operation of a power-by-light valve ( 15 ) by a source ( 11 ) along an optical fibre ( 13 ) is monitored by means of optical sensors ( 14 ) from which light passes back along fibre ( 13 ) to monitoring and processing units ( 16, 17 ). The sensors ( 14 ) include fibre bragg gratings ( 41, 43 ) for detecting differential pressure across diaphragms ( 42 ) and for detecting temperature. At the input end, an optical coupler ( 12 ) supplies sensor signals to units ( 16, 17 ) which can control source ( 11 ) via a signal ( 32 ). |
