Low velocity impact location identification method based on correlation dimension calculation and three-circle intersection principle

A technology of correlated dimension and low-speed impact, which is applied in measurement devices, detection of response signals, analysis of solids using sonic/ultrasonic/infrasonic waves, etc. Dispersion phenomenon, reduce positioning accuracy, etc.
CN106501359AInactive Publication Date: 2017-03-15NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2017-03-15
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

Belonging to the technical field of impact monitoring of structural health monitoring, the invention discloses a low velocity impact location identification method based on correlation dimension calculation and three-circle intersection principle. The method includes the steps of: 1. sensor layout; 2. correlation dimension calculation of impact response signal time sequence; 3. processing of sensor response signal corresponding to a to-be-measured impact point and correlation dimension calculation of its time sequence; 4. determination of the area where the to-be-measured point is located, and calculation of the correlation dimension of sensor response signal time sequences corresponding to different sample impact points in the area; 5. building of a relational model between the length from a sample impact point to a sensor and the correlation dimension of sensor response signal time sequence in the area where the sample point is located; and 6. calculation of the specific coordinate location of a to-be-measured impact point based on three-circle intersection. The method provided by the invention has the characteristics of no need for a lot of prior knowledge and good transplantability, etc.
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Description

Technical field

[0001] The invention belongs to the technical field of impact monitoring of structural health monitoring, and particularly relates to a plate structure impact monitoring method based on the correlation dimension in a fractal theory system. Background technique

[0002] Modern large structures such as space shuttles, high-rise structures, new bridges, long-span grid structures, etc. will be affected by design loads and various sudden external factors such as foreign object shocks and vibrations in complex service environments. Vibration or shock can cause different degrees of damage to the structure. These damages are highly concealed, the mechanism of damage and failure is complex, and the type and extent of damage are difficult to judge. However, if these damages are not detected in time and corresponding measures are taken, they will cause structural damage to accumulate, degrade its structural mechanical properties, and threaten structural safety. , Causing ca...

Claims

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