Distributed fiber Bragg grating sensor long-distance automatic measuring, monitoring and early warning system
A technology of grating sensor and distributed optical fiber, which is applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems of large investment and incomplete measurement content
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[0022] The long-distance automatic measurement, monitoring and early warning system of the distributed fiber grating sensor of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] Such as figure 1 As shown, in the tunnel section, select a certain suitable position and arrange one or more measurement loops. Usually, one measurement loop is the space body measurement loop 1, which runs through the entire longitudinal direction of the tunnel and forms a closed measurement point network with the ground measurement points for Calculate the 3D coordinates of each survey point on the survey network. Two of the plane measurement circuits 2 are used to measure the angle displacement between the middle segment and the bottom segment of the tunnel. According to the rigid assumption of the segment, the convergence of all sections of the entire tunnel can be calculated. For the high-speed rail system, only a horizontal pla...
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