Orthogonal polarization fiber bragg grating vector torsion sensing device and detection method thereof

Abstract

The invention discloses an orthogonal polarization fiber bragg grating vector torsion sensing device and a detection method thereof. The torsion sensing device comprises a vertical cavity surface emitting laser (VCSEL) light source, a polarization processing unit, a sensing probe, a orthogonal polarization demodulation processing unit and an optical fiber circulator/coupler, and the polarization processing unit, the sensing probe and the orthogonal polarization demodulation processing unit are connected through the optical fiber circulator/coupler. The detection method of the torsion sensing device includes that a polarization maintaining optical fiber bragg grating is used as a sensing unit, two groups of mutually orthogonal polarization state energy intensity messages are simultaneously obtained through an orthogonal polarization vector demodulation unit, and accurate measurement of torsion angles and directions can be achieved through a vector analysis module. The torsion sensing device uses a full optical fiber structure so that the torsion sensing device has the advantages of being high in integration level, good in stability, compact in structure, high in sensitivity, low in costs, easy to network and capable of achieving functions of temperature changing self-calibration and light source shaking inhibiting.

Description

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AI Technical Summary

Benefits of technology

This patented technical effect of this inventor's innovative twin-focal type sensory device lies within three main features - accuracy, efficiency, flexibility, and security against environmental factors like heat or vibrations. It includes an improved version called CFOG gratings, which allows for precise measurements without distortion due to thermal variations. Additionally, there is also incorporated into the device a special process called coherer compensator, where each component helps stabilizing the rotational axis while reducing errors induced through external influences. Overall, these improvements improve performance and reliability of the overall device.

Problems solved by technology

Technological Problem: Current Torque Tensor designs have limitations such as bulky weight or complicated manufacturing processes due to complex fabrication techniques used during production. Additionally, current methods require expensive equipment like electric magnetic induction machines, electrostrictive force devices, and magnetoeletron gratings, making them difficult to integrate onto smaller electronic components without compromising their performance capabilities.

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