Structural health monitoring is an essential task to ensure the safety and integrity of critical structures such as aircraft, bridges and buildings. However, existing monitoring techniques have a number of limitations such as: sensitivity (they may not be able to detect small or localized damage), accuracy (they may generate inaccurate results, leading to incorrect diagnoses) and reliability (they may be affected by environmental factors such as temperature and vibration).
The proposed invention presents a new structural health monitoring method that overcomes these limitations. The method is based on measuring the deformation field on the surface of the structure under test. The deformation is measured using fiber Bragg grating (FBG) sensors.
First, a network of FBG sensors is applied to the surface of the structure under test. Next, a light source is used to excite these sensors and the light transmitted by them is collected and analyzed. This analysis makes it possible to determine the deformation field on the surface of the structure, making it possible to identify damage.
Patent title:
Method and system for structural health monitoring with frequency synchronization
Deposit Number:
BR 11 2017 008942 4
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