Novel gyro north seeker and north seeking method

A north finder and gyroscope technology, which is applied to north-seeking equipment and north-seeking fields, can solve the problems of insignificant change of gyro output ω, weak rate component, weak anti-interference ability, etc., so as to improve measurement accuracy and anti-interference ability, easy Achieve, reduce size and cost effect

Inactive Publication Date: 2014-05-07
于中权
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the earth's rotation angular rate component sensitive to the gyro in the gyro north finder is weak, especially the change of the gyro output ω caused by the small angle change is not obvious. During the measurement process, the gyro output ω is a low-frequency DC signal, and the anti-interference ability is weak Due to gyro drift, temperature, vibration and other factors, it is difficult to achieve fast and high-precision north-seeking

Method used

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  • Novel gyro north seeker and north seeking method
  • Novel gyro north seeker and north seeking method

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Embodiment 1

[0043] Attached below figure 1 , 2 , 3. The novel north-finding method described in the present invention is described in detail.

[0044] The modulation signal source 12 generates a modulation signal β, which is sent to the angle modulator 2. Under the excitation of the modulation signal β, the output shaft of the angle modulator 2 makes a periodic angular motion ψ with respect to the periodic motion center of the angle modulator 2, and the periodic angle The motion ψ acts on the gyroscope 1, so that the input axis of the gyroscope is in the horizontal plane, and the periodic angular motion ψ is performed with respect to the periodic motion center of the angle modulator 2;

[0045] ψ=m f sin Ωt (2)

[0046] where, Ω is the angular frequency of the periodic angular motion, m f is the angular amplitude of the periodic angular motion, and t is the time.

[0047] According to north-seeking formula (1) and periodic angular motion ψ, formula (3) can be obtained:

[0048]...

Embodiment 2

[0070] Attached below image 3 , 4 , 5, 6, the concrete work process of novel gyro north finder described in the present invention is described.

[0071] In the new gyro north finder, the base 9 is fixed on the carrier, and the gyro north finder is leveled by using the foot screw 7 , and the leveling result is judged by the level 8 . When the gyro north finder system is powered on, the modulation signal source 12 generates a modulation signal β, which is sent to the angle modulator 2 and the signal processing system 13. The angle modulator 2 receives the modulation signal β, and its output shaft drives the gyro 1 installed on it. A periodic angular motion ψ is performed around the center of the periodic motion of the angular modulator 2 . Then the gyro output ω is:

[0072] ω=ω B +ω eh cosψ 0 J 0 (m f )+2ω eh [J 2 (m f ) cosψ 0 cos2Ωt-J 1 (m f ) sinψ 0 sinΩt]

[0073] ω is a mixed signal whose frequency is the fundamental frequency and double frequency of the...

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Abstract

The invention relates to a novel gyro north seeker and a north seeking method. The novel gyro north seeker is composed of a gyro (1), an angle modulator (2), a rotary table (3), a photoelectric encoder main raster code disc (4), a photoelectric encoder direction identification disc (5), a base (6), foot screws (7), a leveler (8), a pedestal (9), a motor (10), a transmission mechanism (11), a modulation signal source (12), and a signal processing system (13). The invention provides the north seeking method consisting of: applying a periodic angular motion modulation signal to the gyro (1) by the angle modulator (2), changing direct measurement of a gyro (1) output intensity signal to measurement of a gyro (1) output frequency signal, and at the same time employing a synchronous tracking mode, and using the motor (10) to keep the periodic motion center of the angle modulator (2) coinciding with the north direction, i.e. psi0=0, and taking psi0=0 as a closed loop control condition to construct the north seeking method of a gyro north seeker closed loop system. Due to the employment of angle modulation and synchronous tracking technologies, the gyro north seeker based on the north seeking method greatly reduces the requirements for gyro technical indicators, improves the north seeking precision and anti-interference ability, and can realize rapid and high precision north seeking.

Description

technical field [0001] The invention relates to a north-seeking device and a north-seeking method, in particular to a novel gyro north-finding instrument and a north-seeking method. Background technique [0002] The north finder is a high-precision inertial instrument that can automatically indicate the orientation under static conditions all-weather. It is widely used in engineering measurement fields such as mining, railway, construction, military, aerospace, and navigation. North finders are divided into two categories: gyro north finders and non-gyro north finders. The gyros used in gyro north finders include fiber optic gyroscopes, laser gyroscopes, micromechanical gyroscopes, flexible gyroscopes, electrostatic gyroscopes, liquid floating gyroscopes, and air-floating gyroscopes. [0003] The principle of the north-seeking method in the prior art: [0004] Gyroscopes determine north by directly measuring the angular velocity components of the Earth's rotation in diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C17/00G01C19/00
CPCG01C19/38
Inventor 于中权
Owner 于中权
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