A Real-time Monitoring Method of Wing Shear Force Based on Fiber Bragg Grating Measured Strain

A technology of optical fiber grating and actual strain measurement, which is applied in the measurement of force, the measurement of the change force of the optical properties of the material when it is stressed, and the measurement device. Calibration, cumbersome calibration process and other issues, to achieve the effect of health management, strong anti-electromagnetic interference ability, and aircraft safety

Inactive Publication Date: 2019-06-25
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, my country has not yet realized the long-term, real-time online monitoring of the shear force on the wing of the aircraft in service. The existing method for wing load research is based on the monitoring method of strain gauges, which can only realize individual aircraft Short-term monitoring, and the measurement equipment is complicated, the calibration process is cumbersome, and the reliability is low. It is impossible to calibrate every aircraft in service, and it is impossible to realize long-term, real-time online monitoring of the aircraft.

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  • A Real-time Monitoring Method of Wing Shear Force Based on Fiber Bragg Grating Measured Strain
  • A Real-time Monitoring Method of Wing Shear Force Based on Fiber Bragg Grating Measured Strain
  • A Real-time Monitoring Method of Wing Shear Force Based on Fiber Bragg Grating Measured Strain

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Embodiment Construction

[0047] A real-time monitoring method for aircraft wing shear force based on fiber grating measured strain provided by the present invention, see figure 1 As shown, it is realized through the following steps:

[0048] Step 1: Paste the fiber grating sensor on the wing;

[0049]On the surface of the wing, deploy n points of fiber grating sensor measuring points along the direction of the rigid axis of the wing until it is close to the end of the wing, such as figure 2 as shown; or, deploy n points of FBG sensor measuring points on the surface of the wing along the direction perpendicular to the fuselage, until it is close to the end of the wing, such as image 3 shown;

[0050] Among them, no matter whether the fiber grating sensor is placed along the direction of the rigid axis of the wing or along the direction perpendicular to the fuselage, the position of the last one or several fiber grating sensor measuring points will be close to the position of the pressure center of ...

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Abstract

The invention relates to a wing shearing force real-time monitoring method based on the measured strain of a fiber bragg grating (FBG). The method comprises the specific steps of 1, arranging a fiber grating sensor on a wing; 2, obtaining the measured strain of the fiber grating sensor; 3, analyzing the shearing force state of the wing; 4, calculating the shearing force of the wing. Based on the above steps, the measured strain data of the fiber grating sensor arranged on the wing, the shearing force of the wing is calculated and obtained. Therefore, only based on the measured strain of the fiber bragg grating, the shearing force of the wing is obtained without obtaining the information of the load of the wing, the structure of the wing and the like. As a result, the actual problem that the shearing force of the wing can be monitored in real time only based on the measured strain of the fiber bragg grating can be solved.

Description

Technical field: [0001] The invention provides a real-time monitoring method of wing shear force based on the measured strain of fiber grating, specifically relates to the real-time monitoring of wing shear force by using the measured strain measured by fiber grating to realize the real-time monitoring of wing shear force. The invention relates to the real-time monitoring of the shear force on the wing of the aircraft by using the measured strain measured by the optical fiber grating on the aircraft in the fatigue test of the whole aircraft, and belongs to the technical field of test and measurement. Background technique: [0002] The wing of an aircraft is one of the important structural components of the aircraft and a key factor to ensure the safe flight of the aircraft. During the entire life cycle of the aircraft, the aircraft wing will experience a specific load history, which is a key factor determining the service life of the aircraft wing, and the shear force of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/24
CPCG01L1/246
Inventor 张卫方魏巍梁小贝刘晓鹏任飞飞李英武张萌金博
Owner BEIHANG UNIV
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