North seeking device

A servo system and turntable technology, applied in the field of north seeking devices, can solve problems such as Coriolis acceleration signal interference

Inactive Publication Date: 2008-05-28
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, after theoretical analysis, due to the inclination of the turntable, there is a periodic acceleration in the vertical direction at the edge of the turntable, which will cause serious interference to the Coriolis acceleration signal to be extracted

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the embodiment given with accompanying drawing.

[0014] Referring to Fig. 1, the turntable 3 driven by the servo system, the motor, the encoder arranged on the motor, the measurement accelerometer 1 and the additional accelerometer 2 fixed on the turntable 3, and the data acquisition and processing system connected through the serial port The composition is characterized in that the measuring accelerometer 1 is arranged on the edge of the turntable 3, and the distance from the center of the turntable 3 is R, and its measuring axis a k1 Perpendicular to the table, the additional accelerometer 2 is set at the center o of the turntable 3, and its measuring axis a k2 Point to the measuring accelerometer 1 along the radial axis of the turntable 3 .

[0015] The working principle of the north-finding device of the present invention:

[0016] As shown in Figure 2, when the tilt of the turnta...

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PUM

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Abstract

The invention relates to a north seeking device which is applied to the directional and positioning field, in particular to an inertia north seeking device which uses an accelerometer as an inertia component, which comprises a servo-system, a rotating platform which is driven by a motor, a code device which is arranged on the motor, a measuring accelerometer and an additive accelerometer which are fixed on the rotating platform, and a data gathering and processing system which are connected through a serial port, wherein the measuring accelerometer is arranged on the edge of the rotating platform, a gauging spindle ak1 is vertical to the surface of the platform, an additive accelerometer is arranged in the central portion of the rotating platform, and a gauging spindle ak2 points at the measuring accelerometer along a sagittal diameter of the rotating platform. The invention has the function of automatic levelling compensation, the leveling compensation comprises a compensation of measuring error which is caused by leveling error, and an eliminate of interference noise which is caused by leveling error, thereby the measuring accuracy is effectively increased.

Description

technical field [0001] The invention relates to a north-seeking device applied in the fields of orientation and positioning, in particular to an inertial north-seeking device using an accelerometer as an inertial device. Background technique [0002] Inertial north-seeking technology is an important part of the inertial technology field. It obtains north direction information by measuring or sensitive earth speed, so as to measure the true meridian position of any measuring point and realize the process of finding north. With the development of precise measurement technology, many methods for north-finding positioning have emerged, such as: inertial method, astronomical observation method, geodetic method, satellite positioning method, reference object method and other high-precision north-finding methods. However, under special conditions such as tunnels, underwater and other complex terrains and complex weather environments, astronomical observation methods, geodesy metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C17/00G01C21/16
Inventor 沈铖武王志乾刘畅高峰端李建荣赵雁
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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