Uniaxial laser gyro north seeker and north-seeking method thereof

Abstract

The invention discloses a uniaxial laser gyro north seeker and a north-seeking method thereof. The north seeker comprises a mechanical rotating cabin and an electronic cabin, wherein the mechanical rotating cabin comprises a prism-type digital laser gyroscope, an inclinometer, a rotating cabin secondary power source and a uniaxial rotary table; the electronic cabin comprises a calculation computer, a rotary table controller, an Ethernet converting circuit and an electronic bin secondary power source. The north-seeking method comprises two steps, namely a coarse north seeking step and a fine north seeking step, in the coarse north seeking step, a three-position north seeking method is adopted, and in the fine north seeking step, a two-position north seeking method is adopted. The north seeker provided by the invention can realize functions of high north seeking precision, low power consumption, short north seeking time, high reliability, low cost, and small size under a vehicle-mounted environment, has an anti-interference ability, and can complete north seeking in case of base disturbance caused by blowing, people walking, engine vibration and the like.

Description

technical field [0001] The invention relates to an instrument for measuring the angle between its reference side and the geographic true north, especially a single-axis laser gyro north-seeking based on north-seeking algorithm, mechanical arrangement, turntable position control strategy, and data processing under the condition of disturbing the base instrument. Background technique [0002] The north finder is an instrument that measures the angle between its reference side and the geographic true north. It can provide information such as azimuth and attitude for other equipment. It is widely used in quasi-military fields, and it is also indispensable in civilian fields such as tunnel construction and mine surveying. [0003] At present, most north-finding instruments use a combination of fiber optic gyroscope, single-axis turntable and accelerometer to realize the north-seeking function. Due to the limitation of the core components of the fiber-optic gyroscope, it is diffi...

AI Technical Summary

Problems solved by technology

[0003] At present, most north-finding instruments use a combination of fiber optic gyroscope, single-axis turntable and accelerometer to realize the north-seeking function. Due to the limitation of the core components of the fiber-optic gyroscope, it is difficult to improve the north-finding accuracy again. The north-seeking time can only be improved by extending the north-seeking time precision

Some single-axis gyro north finders are also realized by laser gyro, but in order to meet the north-finding accuracy in the non-horizontal state, a single-axis or dual-axis accelerometer is also added to measure the horizontal angle to complete the compensation, resulting in a direct increase in hardware costs

[0004] At the same time, the north-finding accuracy of the static north-finder is greatly affected by the base disturbance caused by wind blowing, personnel walking, engine vibration, etc., especially for the vehicle-mounted north-finder, it is difficult to effectively isolate the influence of the base disturbance

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