A kind of optical fiber length online measuring device and method

Abstract

The invention belongs to the technology of optical fiber measurement and particularly relates to an online measurement device for the optical fiber length. The device comprises a torque measurement device, a micro-force detection device and a control system. An optical fiber wheel around which an optical fiber is wound is fixed to an optical fiber wheel fastening mechanism, and the optical fiber is wound around a groove of a rod head of the micro-force detection device to be connected with a target body. Due to the adoption of a display and control panel starting system, the control system collects information of the torque measurement device and the micro-force detection device, and the information is transmitted to a display and control panel after being processed. The online measurement device can be used for detecting the optical fiber length and the optical fiber tension in real time in the winding process of an optical fiber ring of a fiber optic gyroscope, and the winding quality is improved.

Description

technical field [0001] The invention belongs to the technical field of sensor length measurement, and relates to an accurate on-line optical fiber length measurement device and method. Background technique [0002] On-line measurement of fiber length is of great significance to the production of fiber optic sensors, especially fiber optic gyroscopes. At present, the fiber length in the fiber winding process cannot be measured online in real time, and its length control is all approximated. [0003] Due to its special physical characteristics, there is no general and effective solution for measuring the length of fiber filaments such as optical fibers. The more mature schemes mainly include mechanical, photoelectric, and image processing. The so-called mechanical type is to wind the optical fiber on a roller, and calculate the length of the optical fiber by calculating the rotation speed of the roller, but there is a large relative slip in the process of changing the optica...

AI Technical Summary

Problems solved by technology

The so-called mechanical type is to wind the optical fiber on a roller, and calculate the length of the optical fiber by calculating the rotation speed of the roller, but there is a large relative slip in the process of changing the optical fiber around the roller, and the measurement error is large; the photoelectric type uses light. Doppler frequency shift is used to achieve measurement. This scheme has a large test error for transparent objects such as optical fibers, and its detection rate is low; Matching calculation, it cannot be calculated when the outer surface of the optical fiber is uniform, this method is generally suitable for the measurement of the length of textile fibers

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