Self-detecting circuit and self-detecting method for open-loop optical fiber gyroscope

Abstract

The invention discloses a self-detecting circuit for an open-loop optical fiber gyroscope. The self-detecting circuit comprises a light source, wherein one end of the light source is connected with a light source driving circuit for driving the light source to emit light, and the other end of the light source is connected to a PZT through a coupler C2, a polarizer and a coupler C1; the coupler C2 is connected with a detector; a pre-amplification circuit is arranged at the output end of the detector; one path of the pre-amplification circuit is connected with the light source driving circuit, and one path of the pre-amplification circuit is connected with a signal access point; the output end of the signal access point is connected to a demodulating circuit through a signal modulating circuit; the output end of the signal modulating circuit is connected with the PZT; the input end of the demodulating circuit is connected with a signal waveform; the input end of the signal access point is connected with a phase modulation circuit and a self-detecting differential amplification circuit; the light source driving circuit is also connected with the self-detecting circuit. A self-detecting method for the open-loop optical fiber gyroscope comprises air self detection for monitoring driving current of the light source driving circuit in real time and ground self detection, and a static gyroscope self-detecting part and a rotary gyroscope self-detecting part are included in the ground self detection.

Description

Technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a self-inspection circuit and a self-inspection method of an open-loop optical fiber gyroscope. Background technique [0002] In recent years, open-loop fiber optic gyroscopes have attracted more and more attention from the industry due to their small size, light weight, low cost, simple structure, low power consumption, short start-up time, and long service life. There is a development trend of gradually replacing mechanical rate gyros, but it still cannot replace traditional mechanical gyros in the field of flight control. The main reason is that rate gyros are required to have fault self-checking functions in the flight control system (including ground self-check and aerial self-check). Part of the function), but the previous open-loop fiber optic gyroscopes do not have this self-check function. Summary of the invention [0003] The purpose of the present invention is...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the open-loop fiber optic gyroscope cannot perform self-inspection, and provides a circuit and method for realizing the self-inspection function of the open-loop optical fiber gyroscope through a hardware circuit

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