Strapdown attitude and heading reference system (AHRS) based on fiber optic gyro (FOG)

A strapdown attitude system and fiber optic gyroscope technology, applied in navigation calculation tools, navigation through speed/acceleration measurement, etc. Effect

Inactive Publication Date: 2011-07-27
BEIJING SANCHI TECHNOOGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hardware implementation of the traditional strapdown attitude system is relatively large due to the low level of integration.

Method used

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  • Strapdown attitude and heading reference system (AHRS) based on fiber optic gyro (FOG)
  • Strapdown attitude and heading reference system (AHRS) based on fiber optic gyro (FOG)
  • Strapdown attitude and heading reference system (AHRS) based on fiber optic gyro (FOG)

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Embodiment Construction

[0026] Embodiments of the present invention will be described in detail below with reference to the drawings.

[0027] figure 1 It is a block diagram of the hardware structure of the heading attitude system. As shown in the figure, the heading attitude system of the present invention includes: an inertial measurement unit (IMU) 1, a navigation computer unit 2 and a CAN bus communication node unit 3. Wherein, an inertial measurement unit (IMU) 1 includes three identical fiber optic gyroscopes 11 and a digital dual-axis inclinometer 12 . The navigation computer unit 2 includes a navigation calculation module 22 and a data acquisition and interface circuit module 23 . The CAN bus communication node unit 3 includes a control device 31 and a test device 32 .

[0028] Wherein, a power management and monitoring module 21 and a temperature sensor module 24 may also be included.

[0029] Wherein, the inertial measurement unit (IMU) 1 is used to sense the angular velocity and inclina...

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Abstract

The invention provides a strapdown attitude and heading reference system (AHRS) based on a fiber optic gyro (FOG). The system comprises an inertia measurement unit (1), a navigation calculation unit (2) and a CAN (controller area network) bus communication node unit (3), wherein the inertia measurement unit is used for measuring change information of the angular velocity and inclination angle of a carrier for installing the strapdown AHRS; the navigation calculation unit is used for calculating attitude and heading parameters according to the information measured by the inertia measurement unit (1); and the CAN bus communication node unit is used for transmitting the attitude and heading parameters calculated by the navigation calculation unit (2) to equipment on other CAN buses. The small-sized strapdown AHRS provided by the invention has high integration level.

Description

technical field [0001] The invention relates to a strapdown attitude system, in particular to a strapdown attitude system based on an optical fiber gyroscope. It is suitable for applications with high real-time requirements, low power consumption, small size and high cost performance. Background technique [0002] In order to complete the navigation task and correctly guide the sailing body to reach the destination within the specified time along the predetermined route, it is necessary to know the navigation parameters such as the instantaneous geographical location, navigation speed, attitude and heading of the sailing body at any time, and the navigation system can automatically provide the required various navigation parameters. As an open-loop navigation system, the strap-down attitude system can provide various navigation parameters. The navigation computer is the command center of the strapdown attitude system, and its performance directly affects the performance of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16G01C21/18G01C21/20
Inventor 张宪龙
Owner BEIJING SANCHI TECHNOOGY DEV
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