A large-range optical fiber bending adjustable device

Abstract

The invention provides a large-range optical fiber bending controllable device, which includes a rotational displacement unit, a control unit and an optical fiber fixing unit; the rotational displacement unit includes X, Y screw slides, stepper motors X, Y, Z, and a mobile platform X , Y and optical fiber rotation fixing plate. The optical fiber rotating and fixing plate is set on the stepper motor Z to control the rotation angle of the optical fiber; the middle part of the optical fiber fixed by the optical fiber fixing unit is coplanar with the front part of the optical fiber placed on the optical fiber rotating and fixing plate; one end of the optical fiber is connected to the light source connection, and the other end is connected to a spectrometer or optical power meter; the device controls the movement of each stepper motor through the control unit, thereby adjusting the bending degree of the optical fiber. At the same time, the bending radius can be changed semi-automatically by manually adjusting the length of the bending section through a spiral micrometer. The invention is used to control the curvature radius and bending angle of the optical fiber within a wide range, and provides a reference benchmark for experiments on other performance parameters of optical fiber curvature and bending angle.

Description

technical field [0001] The invention belongs to the technical field of electric control equipment, and in particular relates to a large-range optical fiber bending adjustable device. Background technique [0002] Due to the advantages of small size, light weight, and anti-electromagnetic interference, fiber optic sensors have attracted more and more attention from scholars. Among them, the fiber grating detects the stress by changing the curvature in a small range; in the application of a large range of curvature, the fiber grating can be pasted on the gastroscope to detect the shape of the gastroscope, and realize the three-dimensional reconstruction of the shape of the fiber; the fiber optic sensor can be used in a wide range of bending angles There are also data gloves for sensing applications. Whether it is a multi-mode sensitization intensity demodulation fiber sensor or a data glove based on a fiber Bragg grating wavelength demodulation fiber sensor, the bending radius...

AI Technical Summary

Problems solved by technology

[0003] In the original detection technology, for small curvature changes, it is generally chosen to paste the optical fiber on a flexible iron sheet, and use a displacement platform to fix the two ends for measurement. During the measurement, the change of the displacement platform will cause non-sensing optical fiber position changes, introducing other errors

The measurement of small curvature range generally adopts the method of standard cylinder. The disadvantage is that the bending angle is uncontrollable, and the number of measurement points is limited. Every change will change the shape of the sensing fiber and introduce other errors.

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