Acellent Technologies, Inc.

Franklin J Li

Fu-Kuo Chang

Jeffrey Dean Bergman

Hung Chi Chung

Irene Jhi-Sue Li

Grant Jin-Hau Chang

Susheel Kumar Yadav

Cas Cheung

A structural health monitoring system comprises a first set of sensors operable for coupling to a structure positioned under ground, the first set of sensors further configured to detect an impact upon the structure while the first set of sensors is positioned under the ground; a second set of sensors operable to be positioned on or proximate to a surface of the ground, the second set of sensors further configured to detect an audible event occurring at a distance from the second set of sensors and the structure; and a computer readable memory storing one or more audio signatures that may correspond to the audible event.

Method and apparatus for analysis and detection of encroachment and impact upon underground structures

In one embodiment, a sensor network is attached to a structure and employed to detect and analyze load changes such as impacts from projectiles. An analyzer coupled to the sensors can determine where on the structure the projectile impacted. Coupled with information on the origin point of the projectile, i.e. where it was fired from, the analyzer can then estimate the trajectory of the projectile. The analyzer can also determine whether the projectile passed through the structure and, if so, can extrapolate the estimated trajectory to determine an estimation of whether the projectile has also impacted an object behind the structure.

Systems and methods for ballistic impact detection and trajectory estimation

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Palo Alto, CA, United States of America

Franklin J Li