Method for diagnosing bias fault of sensor of hull structure stress monitoring system
A technology of deviation fault and structural stress, applied in the direction of instruments, measuring devices, optical devices, etc., to achieve the effect of ensuring normal operation and easy realization
Active Publication Date: 2019-08-30
HARBIN ENG UNIV +2
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If the sensor has a deviation fault, its main signal feature is that there is a certain difference between the stress data measured by the sensor and the normal data, but it cannot be simply used as a condition for fault judgment
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[0027] The present invention will be further described below in conjunction with the accompanying drawings.
[0028] The hull structure stress monitoring system is a comprehensive application of structural parameter identification technology, optical fiber sensing technology, database technology, multi-data information fusion technology, data processing technology with large amount of information, finite element analysis technology of hull structure and strength evaluation theory, as well as related sensors, Software and hardware equipment, etc., to realize real-time monitoring and evaluation of ship structure safety. The system mainly has main functions such as data collection, environmental monitoring, stress monitoring, data processing, strength evaluation, alarm and recording, database, and interactive interface, so as to improve the safety of sailing ships. safety performance and accumulate data for ship structure design. The main functions of the system are as image 3 ...
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The invention belongs to the field of hull structure stress monitoring, and in particular relates to a method for diagnosing the bias fault of a sensor of a hull structure stress monitoring system. According to the method for diagnosing the bias fault of the sensor of the hull structure stress monitoring system in the invention, a fibre grating strain sensor arranged in a structure monitoring point acquires real-time stress data in a certain time period; historical stress data of the fibre grating strain sensor same as or close to the motion amplitude of a ship is searched from a database; and, in combination with a judging condition that the sensor has bias fault, whether corresponding fibre grating strain has bias fault or not can be judged. The method in the invention is easy to realizeand high in operability and reliability; error judgement can be avoided; furthermore, whether fibre grating strain has bias fault or not can be accurately judged in real time; a person can be guidedto check and maintain the sensor having the bias fault in time; and thus, normal operation of the hull structure stress monitoring system is ensured.
Description
technical field [0001] The invention belongs to the field of hull structure stress monitoring, in particular to a sensor deviation fault diagnosis method of a hull structure stress monitoring system. Background technique [0002] The structural strength of the hull is one of the main factors affecting the safety of the ship. In order to ensure that the hull has sufficient strength to resist the damage to the structure by environmental loads, various specifications and guidelines have been formulated during the design and construction of the ship, but for navigation For ships in the marine environment, the loads on the structure are highly random, and these random factors cannot be accurately predicted during the design and construction process. Therefore, a stress monitoring system for the hull structure is introduced to ensure the safety of the ship during use. . [0003] The hull structure stress monitoring system is an important part of the intelligent hull, and the sens...
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Login to View More IPC IPC(8): G01B11/16
CPCG01B11/165
Inventor 周学谦刘玉超任慧龙冯国庆李陈峰李辉孙树政许维军徐敏刘浩
Owner HARBIN ENG UNIV