U.S. Patent 8,410,952, Method for Forewarning of Critical Condition Changes in Monitoring Civil Structures
Description: Sensor modules including accelerometers are placed on a physical structure and tri-axial accelerometer data is converted to mechanical power (P) data which then processed to provide a forewarning of a critical event concerning the physical structure. The forewarning is based on a number of occurrences of a composite measure of dissimilarity (Ci) exceeding a forewarning threshold over a defined sampling time; and a forewarning signal is provided to a human observer through a visual, audible or tangible s1gnal. A forewarning of a structural failure can also be provided based on a number of occurrences of (Ci) above a failure value threshold.
Date: January 1, 2013
Creator: Abercrombie, Robert K & Hively, Lee M