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Strap down inertial navigation wave measurement method and system

A strapdown inertial navigation and wave measurement technology, which is applied to measurement devices, mapping and navigation, open-air water source surveys, etc. The effect of observation accuracy and deployment flexibility, small size, good stability and reliability

Active Publication Date: 2017-08-08
SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] Based on the above points, the current stable inertial platform-based wave sensor has problems such as high instrument cost, low system reliability, lack of real-time observation and calculation capabilities, and large volume and mass that are not conducive to installation and use.

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  • Strap down inertial navigation wave measurement method and system
  • Strap down inertial navigation wave measurement method and system

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Embodiment Construction

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings and embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0046] see figure 1 , is a flow chart of a strapdown inertial navigation wave measuring method according to an embodiment of the present invention, including the following steps:

[0047] Step 1, obtaining the motion trajectory data and motion attitude data of the carrier along with the waves in three-dimensional space;

[0048] Step 2, performing strapdown inertial navigation attitude calculation on the motion trajectory data and motion attitude data, obtaining the Euler attitude angle and attitude matrix of the carrier, and obtaining the acceleration of the carrier in the natural geographic coordinate system according to the attitude matrix;

[0049] Step 3, perform quadratic integration on ...

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Abstract

The invention discloses a strap down inertial navigation wave measurement method and system. The method comprises the following steps: 1, acquiring moving track data and moving attitude data of a carrier in a three-dimensional space along with waves; 2, performing strap down inertial navigation posture calculation on the moving track data and the moving attitude data, thus obtaining an Euler attitude angle and an attitude matrix of the carrier, and obtaining an acceleration of the carrier under a natural geographical coordinate system according to the attitude matrix; 3, performing twice integration on the acceleration under the natural geographical coordinate system, and obtaining a displacement of the carrier; 4, performing zero-crossing wave statistics according to the displacement of the carrier, and indicating a direction with the maximum occurrence rate to be a main wave direction. According to the strap down inertial navigation wave measurement method, real-time sampling and calculation and outputting of attitude, speed and displacement information can be realized; meanwhile, the real-time observation capacity and the standardization of an instrument are improved, the instrument performance is improved, and the cost, the volume and the mass of the instrument are reduced.

Description

technical field [0001] The invention relates to the field of ocean wave observation, in particular to a strapdown inertial navigation wave measuring method and system. Background technique [0002] In the field of ocean wave observation, acceleration-type wave observation equipment has been the main means of ocean wave observation since its inception for more than 30 years because of its advantages such as not being affected by time and space and having a wide range of observation periods. For a long time, people have paid great attention to accelerometer wave technology (acceleration-displacement integration, signal filtering, etc.) and wave data processing methods (time domain characteristic statistics, frequency domain spectrum analysis, etc.). The development of acceleration wave sensors based on high-performance embedded technology began in the last 20 years with the development of electronic technology. In the accelerometer technology, an important link is to obtain t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C13/00
CPCG01C13/002
Inventor 周峰华谢强王东晓邢亚琳
Owner SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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