Sensing optical fiber laying device and method in similar material model test

Abstract

The invention provides a sensing optical fiber laying device and method in a similar material model test, and the device comprises a fixed plate, a telescoping rod, a connecting plate, and an optical fiber fixing plate, the lower surface of the fixed plate is connected with the telescoping rod, the upper surface of the connecting plate is connected with the telescoping rod, and the telescoping rod is composed of a positively and negatively buckled nut and a positively and negatively threaded screw. The optical fiber fixing plate is provided with a U-shaped groove, a steel plate for fixing an optical fiber and a screw hole. The layout method comprises the following steps: arranging one device at each of two ends of the sensing optical fiber, and connecting with a model frame; and placing the optical fiber in the center of the optical fiber fixing plate through the U-shaped groove, placing the customized rubber in a gap between the optical fiber and the optical fiber fixing plate in an attached mode, fastening the rubber in the U-shaped groove through the screw and the steel sheet, fastening the optical fiber fixing plate and the connecting plate into a whole through the screw, and straightly fixing the sensing optical fiber by rotating the telescopic rod through the handle, so that the sensing optical fiber has certain tension in the model laying process and is better coupled with a model material, and the simplicity and convenience of a test and the reliability of a test result are improved.

Description

Technical field[0001]The present invention relates to the field of similar material model test, and in particular, to physical model testing devices and layout methods.Background technique[0002]Distributed fiber sensing technology is based on the distribution characteristics along the light energy, acquires measured distribution information in the sensing fiber region with time and spatial variations, and applies more and more widely used in the physical similar model tests in many areas such as mines, buildings. . When laying a sensing fiber in a physical similar model, it is affected by the deformed modulus of the sensing fiber and the similar material, the laying sensing fiber is in a relaxed state, it is difficult to ensure that the sensing fiber is in the shape of the design, causing the initial sensation of the test There is a distortion problem between the monitoring data obtained by the fiber and the actual deformation.Inventive content[0003]In response to the shortcomings o...

AI Technical Summary

Problems solved by technology

When laying the sensing fiber in the physical similarity model, affected by the deformation modulus of the sensing fiber and similar materials, the laid sensing fiber is in a relaxed state, and it is difficult to ensure that the sensing fiber is in the straight state as designed, resulting in the initial test passing the sensing fiber. There is a distortion problem between the monitoring data obtained by the optical fiber and the actual deformation

Images