| 摘要 |
PROBLEM TO BE SOLVED: To simultaneously measure a number of physical quantities by using a fiber measuring sensor. SOLUTION: A sensor measuring system comprises a plurality of fiber measuring sensors 11, where transmission loss is changed according to applied physical quantity; an optical fiber 7 for connecting each fiber measuring sensor in series; an optical pulse tester 10 for applying measuring light having pulse waveform from one end of an optical fiber for measuring and outputting reflection waveform (g); a reference waveform memory 23 for storing the reflection waveform (g) in a state, where no physical quantity is applied to each fiber measuring sensor, as reference waveform (e); a section 27 for calculating the amount of differential change; and physical quantity evaluating means 29, 31, 32 for evaluating physical quantity D applied to each fiber measuring sensor, based on the amount of differential change at distance calculated by the section 27 for calculating the amount of differential change. The section 27 for calculating the amount of differential change calculates the amount of differential change E at distance in the differential waveform (h) by a differential calculation section 25 that sets the reflection waveform (g) outputted from the optical pulse tester as the measuring waveform (f) in measuring execution and calculates the differential waveform (h) between the referential waveform and the measuring waveform. COPYRIGHT: (C)2005,JPO&NCIPI
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