ENVIRONMENTAL CHANGE COMPENSATION IN A STRUCTURAL HEALTH MONITORING SYSTEM
First Claim
1. A method of compensating for environmental effect changes when detecting a signal, comprising:
- collecting baseline data signals at one or more values of an environmental effect variable, wherein the baseline data signals are propagated through a structure;
selecting a threshold based on the baseline data;
collecting current data signals, wherein the current data signals are propagated through the structure;
determining a value of the environmental effect variable corresponding to a closest match between the collected current data signals and the collected baseline data signals; and
detecting damage in the structure by comparing collected current data signals to the threshold.
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Accused Products
Abstract
A method and system of compensating for environmental effect when detecting signals using a structural health monitoring system includes collecting baseline data signals for one or more values of the environmental effect variable from signals transmitted along selected paths between transducers in an array attached to the structure. A threshold is selected based on the baseline data for determining if the signal is detected. Current data signals are collected and matched to the best fit baseline data. The value of the environmental effect variable is determined on the basis of the matching. A signal is detected according to the selected threshold.
26 Citations
20 Claims
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1. A method of compensating for environmental effect changes when detecting a signal, comprising:
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collecting baseline data signals at one or more values of an environmental effect variable, wherein the baseline data signals are propagated through a structure; selecting a threshold based on the baseline data; collecting current data signals, wherein the current data signals are propagated through the structure; determining a value of the environmental effect variable corresponding to a closest match between the collected current data signals and the collected baseline data signals; and detecting damage in the structure by comparing collected current data signals to the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for compensating for environmental effect changes in data in a structural health monitoring system operably coupled to a structure comprises:
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one or more transducers configured in an array attached to the structure; a first software module for acquiring and processing data from the array to provide a baseline data set for compensating for values of an environmental effect variable, and selecting one or more damage detection thresholds; a second software module for processing current signal data acquired from the array to detect damage in the structure by compensating the data for changes in the environmental effect variable and comparing the current signal data to ones of the one or more damage detection thresholds; a memory storing the first and second software modules; a processor to execute instructions of the first and second software modules; and a display operably coupled to the processor for presentation of the damage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification