| 摘要 |
<p>The invention relates to a device for detecting leaks on a ship. Said device comprises at least one sensor arranged in or on a bilge and a signal processing device associated with the sensor, said processing device deriving at least one signal displaying the liquid level in the bilge from a signal emitted from the sensor. The sensor consists of an optical wave guide (4), along which a plurality of Bragg gratings (9A, 9B, 9C) of different grating periods are formed in pre-determined positions. A suitable light source (6) is provided for injecting light into the optical wave guide. The signal processing device (7) comprises an analyser for determining the spectral composition of the light back-scattered onto the Bragg gratings (9A, 9B, 9C), and a computing device for evaluating said spectral composition. The optical wave guide is arranged in the bilge in such a way that the number of Bragg gratings (9C) located beneath the liquid level (12) of a liquid (11) contained in the bilge (2) depends on the liquid level in the bilge (2).</p> |
