Chaotic signal-based angular rate sensor

Abstract

The present invention discloses a chaotic signal-based angular rate sensor, which comprises a chaotic light source emitting module used for emitting a chaotic light signal, a coupler used for receiving the chaotic light signal emitted from the chaotic light source emitting module and then branching the received chaotic light signal into two paths of chaotic optical signals, a first circulator, a second circulator, a fiber loop, a first detector, a second detector and a signal processing module. The first circulator and the second circulator are respectively connected with the two output branches of the coupler. The two ends of the fiber loop are connected with the first circulator and the second circulator. The first detector and the second detector are respectively connected with the first circulator and the second circulator. The signal processing module is connected with the first detector and the second detector. The chaotic signal-based angular rate sensor is simple in structure and can output a rotation angular rate without any extra modulator. Since the angular rate sensor adopts the chaotic laser signal, the angular rate sensor is strong in anti-interference ability.

Description

technical field [0001] The invention relates to the field of optical fiber sensing, and is an angular rate sensor based on chaotic signals. Background technique [0002] Due to its advantages of all solid state, no computing components, small size, light weight, fast response, flexible structure, high potential precision, wide measurement range, and long service life, the fiber optic gyroscope has attracted extensive research at home and abroad. New all-solid-state inertial instrument. Foreign countries have studied fiber optic gyroscopes earlier, and their development and production levels are also relatively high. As early as the end of the last century, Western developed countries led by the United States developed and produced 10-degree precision -4 Order of magnitude high-precision fiber optic gyroscope. my country's development of fiber optic gyroscopes is later than that of foreign countries, and its level is also far behind that of foreign countries. However, as t...

AI Technical Summary

Problems solved by technology

However, the interferometric fiber optic gyroscope has high requirements on the optical path. The backscattering caused by the non-ideality of the optical path, the evolution of the polarization state of the light wave, and the change in the refractive index of the fiber caused by temperature have an important impact on the accuracy of the gyroscope.

The solution period of the gyroscope is limited by the transit time of the fiber optic ring, which greatly affects the bandwidth of the fiber optic gyroscope.

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