| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water gauge system capable of measuring a water level by a simple constitution. <P>SOLUTION: In a water gauge system 100, light incident from a light source 1 is propagated through an optical cable 41 and reaches a port 31 of an optical circulator 3. The light reaching the port 31 is outputted from a port 32 and propagated through an optical cable 43 and reaches a total reflection mirror 5. All light reaching the total reflection mirror 5 is reflected and propagated as reflected light again through the optical cable 43 and reaches the port 32. The reflected light reaching the port 32 is outputted from a port 33 and propagated through an optical cable 42 and reaches an optical power meter 2. When the optical cable 43 is arranged on a water bottom in which a water level is measured, water pressure is applied to an optical fiber 43a of the optical cable 43 and loss proportional to the water pressure is generated in the propagated light. Since the water pressure is proportional to a water level, the water level can be measured by measuring the optical power of the reflected light outputted from the port 33 by the optical power meter 2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
