Optical fiber cladding SPR micro-bending sensor and calibration device thereof

Abstract

The invention belongs to the field of optical fiber sensing, and mainly relates to an optical fiber cladding SPR micro-bending sensor and a calibration device thereof. The optical fiber cladding SPR micro-bending sensor disclosed by the invention has the advantages that the manufacturing difficulty and the manufacturing cost of the optical fiber SPR sensor are reduced; the measurement of the bending curvature through the SPR effect is innovatively proposed and verified, and the research field of the traditional optical fiber type micro-bending sensor is expanded to a certain extent. The optical fiber cladding SPR micro-bending sensor has obvious advantages in landslide disaster monitoring, the large landslide disaster frequency generation points are buried, and once tiny deformation occurson the earth surface, and the landslide intensity can be speculated by observing the depth and the displacement of the SPR resonance peak on the spectrometer, so that the landslide disaster can be monitored, and the optical fiber cladding SPR micro-bending sensor has a wide application value.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, and relates to an optical fiber cladding SPR micro-bending sensor and a calibration device thereof. Background technique [0002] Fiber optic curvature sensors have attracted extensive attention of researchers due to their extensive applications in the field of bending measurement. Bending measurement technology is of great significance in the fields of geophysics, aerospace, machinery and various building structure health monitoring. Because the state of mechanical construction, large buildings and stress parameters are directly related to bending, it is also an indirect means to obtain the mechanical conditions of components when measuring bending; in large building structures such as bridges, houses and rails, in large In oil and gas storage and transportation equipment such as oil tanks, natural gas and gasoline transportation pipelines, in military equipment such as rockets, large missi...

AI Technical Summary

Problems solved by technology

However, expensive lasers and masks are required in the fabrication process of this kind of sensor, and complex preparation process is required; the optical fiber interferometric microbend sensor is mainly the Mach-Zehnder interferometer type, which is simple to manufacture and has good mechanical strength, but the resolution low, low sensitivity

Images