| 摘要 |
A system and method for externally measuring pressure of fluids contained in sealed vessels is provided. The system has a plurality of pressure sensing devices (PSDs), of which one or more PSDs are mounted onto the external surface of any of a plurality of sealed vessels prior to their being filled with the fluid whose pressure is to be measured. Preferable configurations of the system are those in which each vessel is furnished with only one PSD. Each PSD includes at least one segment of fiber Brag grating (FBG) in which a Brag grating having a predefined reflective wavelength is written across its core. The various Brag gratings of a linear array of FBGs differ in their reflective wavelengths, such that a measured value of a reflective wavelength can be associated with the respective grating and therefore with a specific PSD. The pressure of a fluid contained in the sealed vessel is measured in accordance with the present invention by employing a wavelength division multiplexing technique as known. |
