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AssigneeAcellent Technologies, Inc.
InventorsBao Liu, Lien Ouyang, Shawn J. Beard, Irene Li, Fu-Kuo Chang
Estimating the term…
Methods and apparatuses for detecting fastener loosening. Sensors query a structure at a baseline value of an environment variable, such as temperature, and this baseline signal is stored for later use. Subsequently, users can query the structure remotely and at any time, and the signals from these queries are compared to the stored baseline signal. In some embodiments, an index is calculated, and the system determines that one or more fasteners have come loose if the calculated index exceeds a predetermined threshold value. It is desirable to select a time window within which the query signal is most sensitive to fastener loosening but least sensitive to variations in the environment variable. Accordingly, embodiments of the invention include methods and apparatuses for determining an optimal time window for use in calculating the above described index.
A method of detecting a loosening of a fastener on a structure, comprising:
A method of detecting a loosening of a fastener on a structure, comprising:
A method of determining an optimal time window for facilitating detection of a loosening of a fastener on a structure, comprising:
A computer-readable medium storing instructions for carrying out a method of detecting a loosening of a fastener on a structure, the method comprising:
Dependencies are inferred from the claim text.