Time division multiplexing optical fiber grating sensing network with high renewability
A high reproducibility, fiber grating technology, applied in the field of sensing, can solve problems such as failure to work normally, limited number of gratings, and increased scanning cycle, etc., to achieve high reproducibility and reliability, high degree of automation, and convenient The effect of post-maintenance
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[0030] The technical solutions and implementation principles of the present invention will be further described below in conjunction with the accompanying drawings.
[0031] The present invention is a time division multiplexed fiber grating sensing network with high reproducibility, such as figure 1 As shown, it includes the control center 1-1, 1×N optical switch 1-2 (ie master switch), N path selection and delay nodes 1-3 (ie remote node) and N weak reflection fiber grating transmission Sensing subnets 1-4 (ie, sensing subnets). The control center 1-1 is connected to N weak reflection fiber grating sensing subnets 1-4 through 1×N optical switch 1-2, and the weak reflection fiber grating sensing subnet 1-4 is selected by the channel selection and the delay node 1-3 The connection forms a ring structure.
[0032] The function of the control center 1-1 is to provide light sources, demodulate sensor signals, and realize the control of optical switches and programmable optical buffers...
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