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Triaxial integrated all-optical-fiber inertial sensing system

An inertial sensing and all-fiber technology, applied in the field of inertial sensing, can solve problems such as increased redundant design, large noise interference, and poor stability, and achieve the effects of improving stability and reliability, avoiding cross-coupling, and low cost

Inactive Publication Date: 2013-06-12
ZHEJIANG UNIV
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Problems solved by technology

[0003] At present, almost all units developing inertial sensing systems are composed of discrete gyroscopes and accelerometers. During three-axis sensing, the three-axis gyroscopes and three-axis accelerometers are sensitive to the inertial data in the orthogonal direction, causing system The structure is complex, the redundant design increases, and the noise interference is large, the stability is poor, and the integration and processing of data are required, which limits the development of inertial sensor systems

Method used

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Embodiment Construction

[0011] Further illustrate the present invention below in conjunction with accompanying drawing.

[0012] Such as figure 1 As shown, the three-axis integrated all-fiber inertial sensing system includes: light source, 2×3 coupler, X-axis fiber optic inertial sensing combination module, Y-axis fiber optic inertial sensing combination module, Z-axis fiber optic inertial sensing combination module, detection device, A / D converter, processor and D / A converter; among them, one end of the 2×3 coupler is respectively connected to the input end of the light source and the detector, and the other end is respectively connected to the X-axis optical fiber inertial sensing combination module, The Y-axis fiber optic inertial sensing combination module is connected to the Z-axis fiber optic inertial sensing combination module; the detector is connected to the processor through the A / D converter, and the processor is respectively connected to the X-axis fiber optic inertial sensing combination...

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Abstract

The invention discloses a triaxial integrated all-optical-fiber inertial sensing system, which comprises three optical fiber inertial sensing combined modules with vertical installation directions, wherein each module consists of a closed-loop optical fiber gyroscope and an accelerometer; a free port of a coupler in an optical path system of the optical fiber gyroscope is used as a light source input port of the optical fiber accelerometer so as to measure information of an angular speed and an acceleration of the same axial direction at the same time and realize one-dimensional inertial integration; meanwhile, the three axial optical fiber gyroscopes share a light source and a detector; the three gyroscopes adopt a multi-path multiplexing technology, so cross coupling is avoided; compared with the conventional all-optical-fiber sensing system, the triaxial integrated all-optical-fiber inertial sensing system has the advantages that: five light sources and two detectors are eliminated; furthermore, integration and minimization of the system, low cost and low power consumption are realized; and the stability and the reliability are improved.

Description

technical field [0001] The invention relates to the field of inertial sensing, in particular to a three-axis integrated all-fiber inertial sensing system. Background technique [0002] With the rapid development of inertial technology and system technology, inertial measurement systems have been successfully applied in many important fields. As new optical inertial sensors, fiber optic gyroscopes and optical accelerometers, their development speed and degree of integration will affect the upgrade capability of equipment. [0003] At present, almost all units developing inertial sensing systems are composed of discrete gyroscopes and accelerometers. During three-axis sensing, the three-axis gyroscopes and three-axis accelerometers are sensitive to the inertial data in the orthogonal direction, causing system The structure is complex, the redundant design increases, and the noise interference is large, the stability is poor, and the integration and processing of data are requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/72
Inventor 郭文正黄腾超李赓刘承
Owner ZHEJIANG UNIV
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