Force measurement method of FBG force measurement anchor rod
A bolt and force measurement technology, which is applied in the field of force measurement of FBG force measurement bolts, can solve the problems of complex installation and unstable monitoring accuracy, achieve small transmission loss, eliminate the influence of light source power fluctuation and system loss, small size effect
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[0040] The present invention will be further described in conjunction with the accompanying drawings.
[0041] FBG force-measuring bolts, including bolts, bolt anchoring agents, FBG gratings, optical fiber cables, backing plates, and bolt locking devices.
[0042] The diameter of the anchor rod is 16mm, the length is 160cm, the cross section is circular, and the material is the anchor rod of 45# carbon structural steel. Three grooves with a depth of 1.5mm and a width of 2mm are polished along the axial direction on the surface of the anchor rod , and the three grooves are 120° to each other along the axial section.
[0043] The bolt anchoring agent is a fast-curing epoxy adhesive divided into A glue and B glue.
[0044] The FBG grating is a pure silica fiber grating string.
[0045] Such as figure 1 As shown in Fig. 1, three grooves are ground at 120° to each other on the surface of the anchor rod along the axial section. A group of fiber grating strings are arranged in each ...
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