Inertial measurement system based on high-integration-level accelerometer

Abstract

The invention discloses an inertial measurement system based on a high-integration-level accelerometer. The inertial measurement system comprises three orthorhombic all-optical-fiber inertial measurement units, wherein each all-optical-fiber inertial measurement unit consists of an accelerometer and a closed-loop optical fiber gyroscope; the three closed-loop optical fiber gyroscopes share one light source; and a free port of a coupler in each closed-loop optical fiber gyroscope supplies an input light source to the corresponding accelerometer. By adopting a multi-path multiplexing technology, the three accelerometers share one detector, so cross coupling is avoided and five light sources and two detectors are saved, the integration level, the stability and the reliability are improved, and low cost, low power consumption and minimization are realized.

Description

technical field [0001] The invention relates to the field of inertial measurement, in particular to an acceleration-based inertial measurement system. Background technique [0002] In navigation and attitude control systems, the use of fiber optic gyroscopes and accelerometers to measure angular motion in three orthogonal directions has been successful. With the development of inertial technology and civil navigation technology, the requirements for the combined system of fiber optic gyroscopes and accelerometers Also increasingly high precision, miniaturization, low power consumption, and low cost. [0003] However, almost all production units of inertial measurement combined systems are composed of discrete gyroscopes and accelerometers. The fiber optic gyroscopes and accelerometers in three mutually perpendicular directions measure their respective inertial data, which will inevitably increase the overall inertial measurement system. Quality, volume, power consumption...

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Problems solved by technology

[0003] However, almost all production units of inertial measurement combined systems are composed of discrete gyroscopes and accelerometers. The fiber optic gyroscopes and accelerometers in three mutually perpendicular directions measure their respective inertial data, which will inevitably increase the overall inertial measurement system. Quality, volume, power consumption and cost also affect the stability and reliability of the system. Data integration and processing are also required in the data terminal, which limits the development of inertial measurement. Therefore, integration and multiplexing are the most important aspects of inertial measurement. development trend

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