High-sensitivity wide-range stress-strain sensing optical cable and monitoring method thereof
A technology of stress-strain and sensing optical cables, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of being easily affected by the environment, small monitoring range, and low monitoring sensitivity, so as to reduce the difficulty of laying and increase the measurement range , Increase the effect of monitoring range
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[0030] see figure 1 , figure 2 , the high-sensitivity wide-range stress-strain sensing optical cable used in the safety monitoring of structures in the present invention comprises an outer sheath 1 and a strengthening member 2 of twisted structure arranged in the outer sheath 1, a semi-tight sleeve Sensing unit 3 and loose sleeve sensing unit 4. The reinforcement member 2, the semi-tight sleeve sensing unit 3 and the loose sleeve sensing unit 4 are placed in parallel.
[0031] The strengthening member 2 in the sensing optical cable can be made of metal material or non-metallic material, and the structural size of the strengthening member 2 is consistent with the size of the loose-tube sensing unit 4 . The pitch ratio of stranding ranges from 40 to 100; the number of stranding elements is 2 to 7; the diameter of a single element is 0.4 to 1.2 mm; the stranding form is concentric stranding.
[0032] see image 3 , the semi-tight sleeve sensing unit 3 includes first sensing ...
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