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A hull deformation measurement method based on fiber optic gyro inertial navigation system

A fiber optic gyroscope inertial navigation and measurement method technology, applied in the direction of measurement devices, navigation through speed/acceleration measurement, optical devices, etc., can solve the problems of no auxiliary function in measurement, limiting the data output frequency of measurement devices, etc.

Inactive Publication Date: 2016-05-04
HARBIN ENG UNIV
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Problems solved by technology

However, the above methods are all for direct measurement of hull deformation, and the previous measurement information has no auxiliary effect on subsequent measurements, and the real-time performance of hull dynamic deformation measurement is limited by the data output frequency of the measurement device.

Method used

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  • A hull deformation measurement method based on fiber optic gyro inertial navigation system
  • A hull deformation measurement method based on fiber optic gyro inertial navigation system
  • A hull deformation measurement method based on fiber optic gyro inertial navigation system

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Experimental program
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Embodiment

[0068] The optical fiber gyroscope uses the fiber optic gyroscope strapdown inertial navigation system developed by the Marine Vehicle Navigation Equipment Research Institute of Harbin Engineering University, the computer uses the Force9 portable computer produced by Zhongbei Hengyu Company, and the GPS antenna and receiver use Beijing Beidouxingtong Navigation Technology Co., Ltd. Agent of NovAtel's ProPak-V3GPS receiver.

[0069] The specific operation is as follows:

[0070] Press the two sets of fiber optic gyro SINS figure 1 As shown, they are respectively installed in the center and bow of the hull, and the installation error is minimized during installation. Two sets of GPS receivers are respectively connected to two sets of fiber optic gyro strapdown inertial navigation systems to provide time information for the fiber optic gyro strapdown inertial navigation systems. , the Force9 portable computer is installed in the main cabin in the center of the hull to receive th...

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Abstract

The invention provides a ship deformation measurement method based on optical fiber gyro inertia navigation systems. The method comprises the following steps: installing two sets of optical fiber gyro inertia navigation systems in the middle of a ship / warship and at the deck part of a ship head position, building a mathematical model about optical fiber gyro drafting and ship deformation, designing a ship deformation Kalman filter, estimating the static deformation and the dynamic deformation of the ship through the real-time processing of the difference of angular rates sensed by two sets of optical fiber gyros, and realizing the measurement of the ship deformation. The method belongs to an indirect estimation method. Compared with a traditional optical direct measurement method, the ship deformation measurement method has the advantages that the operation is simple and convenient, and the data collection and processing frequency is high. The ship deformation measurement method is suitable for the measurement of the dynamic deformation of the ship, and the precision can reach 30 minutes of arc.

Description

technical field [0001] The invention relates to a hull deformation measurement technology, in particular to a method for real-time dynamic measurement of hull deformation angle. Background technique [0002] In the field of ships, hull deformation is a problem that cannot be ignored and must be solved. Since the 1960s, scholars in the field of ships at home and abroad have begun to study the measurement methods of hull deformation. The initial measurement methods were limited to optical measurement methods. Such as polarized light energy measurement method, dual-frequency polarized light method, grating method, large steel pipe reference method, etc. These methods have high precision, but they are only suitable for studying static hull deformation measurement. With the increasing demand for hull dynamic deformation measurement and the emergence of new measuring devices, scholars at home and abroad have invented a variety of new hull deformation measurement methods, such as l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16G01C21/16
Inventor 徐博肖永平孙天一邱立民刘杨董海波单为金辰
Owner HARBIN ENG UNIV
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