Miniature high-precision optical fiber inertial positioning and orienting device based on spatial multiplexing

Abstract

The invention discloses a miniature high-precision optical fiber inertial positioning and orienting device based on spatial multiplexing. The miniature high-precision optical fiber inertial positioning and orienting device based on spatial multiplexing comprises an upper cover, an outer cover and a base, and further comprises an optical fiber inertia unit body, a transposition mechanism and a circuit assembly, wherein the upper cover, the outer cover and the base are closely combined to form a three-dimensional cavity structure; the optical fiber inertia unit body, the transposition mechanismand the circuit assembly are arranged in the three-dimensional cavity structure; the transposition mechanism comprises an inner frame driving control assembly and an outer frame driving control assembly; and the optical fiber inertia unit body comprises a three-axis optical fiber spinning top, a quartz flexible accelerometer, an angle sensor, a movable toothed plate and a prism. According to the miniature high-precision optical fiber inertial positioning and orienting device based on spatial multiplexing, device and system integration, modular integrated design and a space multiplexing technology are adopted, the problem that an existing optical fiber spinning top vehicle-mounted positioning and orienting instrument is large in size and heavy in weight is solved, miniaturization is realized, environmental adaptation of the system is improved, the size and weight of the system are reduced, and the reliability and maintainability of the system are improved.

Description

technical field [0001] The invention belongs to the technical field of inertial integrated navigation and safety detection, and more specifically relates to a miniaturized high-precision optical fiber inertial positioning and orientation device based on space multiplexing. Background technique [0002] The inertial positioning and orientation system is a device that uses inertial sensitivity combination and acceleration for coordinate positioning. Its working principle is basically the same as that of the semi-analytic inertial navigation system. Before the system works, the initial alignment is carried out first, so that the inertial sensitive combined platform body is leveled relative to the local horizontal plane, and the sensitive axes of the north and east accelerometers are aligned to the north and east respectively. And input the geodetic parameters of the starting point into the computer of the system. After the ground vehicle (such as a car) equipped with an inerti...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a miniaturized high-precision optical fiber inertial positioning and orientation device based on space multiplexing. The space multiplexing technology is used to solve the problem of large volume and high quality of the existing fiber optic gyro vehicle-mounted positioning and orientation instrument, realize miniaturization, provide the environmental adaptability of the system, reduce the volume and weight of the system, and improve system reliability and maintainability

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