| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a system capable of supporting sensors of various physical quantities and capable of simultaneously observing various physical quantities on a plurality of positions by one sensing system. <P>SOLUTION: An optical fiber sensing system is configured so that emission light modulated by a PN code is emitted to a sensor group composed of a plurality of optical fiber sensors respectively arranged on positions having respectively different light path lengths from a light source part and a reflected response signal in each plurality of optical fiber sensors is obtained by mutual correlation processing between the reflected response light and the PN code. In the optical fiber sensing system, the sensor group includes optical fiber sensors corresponding to at least one or more methods capable of detecting different physical quantities, the light source part includes a plurality of light sources for sending a plurality of sorts of emission light modulated by delay PN codes having different delay time values and suited to the optical fiber sensors, and a processing part obtains a reflected response signal of the sensor group by mutual correlation processing between a digital signal of reflected response light from the sensor group and the delay PN code. <P>COPYRIGHT: (C)2012,JPO&INPIT |
