Monitoring method for LPFG (Long Period Fiber Grating) transverse load direction characteristic and pavement pressure sensor
A technology of pressure sensor and lateral load, which is applied in the measurement of the change force of the optical properties of the material when it is stressed, can solve the problems of large electromagnetic interference, achieve strong anti-electromagnetic interference, improve measurement accuracy, and overcome light sources. Effects of Unstable Affect
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[0043] Depend on figure 1 It can be seen that the specific composition of the long-period fiber grating lateral load sensing system of the present invention is that a broadband light source 1 (LG150 type broadband light source can be used), enters the input end of the transmission fiber 2, and propagates to the long-period fiber grating lateral load sensing probe 4. It interacts with the lateral load generated by the loading device 3 in the environment to be tested to produce a coupling effect between the core and the cladding, and the transmitted light enters the spectrometer 5 (AQ6317 spectrometer can be used), and then processed by the computer 6 to output the reflected light intensity and light intensity. The relationship curve between the peaks, thus realizing the full optical fiber of the entire measurement optical path.
[0044] figure 2 It is a schematic diagram of the long-period fiber grating transverse loading experimental device. It includes a broadband light so...
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