Full-temperature quick start fiber-optic gyroscope and full-temperature quick start method

Abstract

The invention relates to a full-temperature quick-start fiber-optic gyroscope. The gyroscope comprises an optical path part and a circuit part, the circuit part comprises an FPGA (8), a DAC (9), a temperature sensor (14) and a light source driving circuit (12); the light source driving circuit (12) is connected with the light path part; the FPGA (8) is respectively connected with the DAC (9) and the temperature sensor (14); the gyroscope is characterized in that the fiber-optic gyroscope further comprises a multi-channel SPI DAC (11) which is respectively connected with the FPGA (8), the DAC (9) and the light source driving circuit (12); the multi-channel SPI DAC (11) provides reference voltage for the DAC (9), and the FPGA (8) controls the output voltage value of the multi-channel SPI DAC(11) and transmits the output voltage value to the light source driving circuit (12), so that the output light power of the light source driving circuit (12) is changed. Compared with the prior art,the quick-start performance of the fiber-optic gyroscope within 2 seconds under the full-temperature condition can be met.

Description

technical field [0001] The invention belongs to the field of fiber optic gyroscopes, and relates to a method for starting a fiber optic gyroscope, in particular to an all-temperature fast-start fiber-optic gyroscope and a full-temperature fast-start method. Background technique [0002] Gyroscope is an angular rate sensor, a device sensitive to angular motion in relative inertial space, and is currently the main sensor used to determine the spatial motion attitude of moving objects. It can be applied to various fields such as sea, land, air and sky. However, due to the harsh application environment of the fiber optic gyroscope, the application environment includes low temperature -40°C and high temperature 60°C. The traditional optical fiber gyroscope light source is usually driven by constant current. Under high and low temperature conditions, the optical power of the optical fiber gyroscope is greatly affected by the initial temperature when it is turned on. There are pro...

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Problems solved by technology

The traditional optical fiber gyroscope light source is usually driven by constant current. Under high and low temperature conditions, the optical power of the optical fiber gyroscope is greatly affected by the initial temperature when it is turned on. There are problems that the detector is saturated due to excessive optical power output or the signal-to-noise ratio is poor when the optical power is too small. However, the optical fiber gyroscope light source must meet the requirements of being able to provide sufficient optical power to start, so the traditional optical fiber gyroscope cannot meet the fast start-up requirement of less than 2s under the condition of full temperature of the optical fiber gyroscope.

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