MULTIPLEX PHYSICAL QUANTITY MEASURING METHOD AND SYSTEM USING OPTICAL MULTIPLE FIBER BRAGG GRATING

摘要

PURPOSE: A method and a system for measuring a number of physical parameters using a plurality of fiber gratings are provided to easily measure the change of the physical parameter to be measured by differently forming the patterns of the response waveforms reflected from each fiber grating to be able to be distinguished each other. CONSTITUTION: A system for measuring a number of physical parameters using a plurality of fiber gratings comprises an optical fiber sensor and a calculator. The optical fiber sensor consists of a plurality of fiber grating sensors which respectively create the different waveform patterns for the incident lights and are aligned along a light transfer path in a line. The calculator detects the wavelength movement of each waveform pattern from the light which has been transmitted to the fiber sensor, has reacted with each fiber grating sensor and then has been detected, and calculates the change of the physical parameter of a target for an environment in which the fiber grating sensor has been installed. The calculator comprises a light source(10), an light distributor and a calculating unit(40).