Skip to Content
Find More Like This
Return to Search

AN OPTICALLY-BASED INTERSTORY DRIFT METER SYSTEM FOR RAPID ASSESSMENT OF THE EARTHQUAKE RESPONSE OF BUILDING STRUCTURES

United States Patent Application

20170307467
A1
View the Complete Application at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A sensor system provides measurement of building interstory drift based on a laser beam impinging on a discrete diode sensor array. The diode sensor array determines the location at which a projected laser bean strikes the array, which provides a direct measurement of interstory drift. The diode sensor array is a two dimensional array of discrete diodes that allow the location of an impinging laser beam to be very accurately tracked as the beam moves back-and-forth across the diode array. Local rotations of the laser source that result from rotations of structural members (e.g. floor beam rotation) are appropriately corrected for. This allows accurate, dynamic measurements of the interstory drift between two floor levels of a shaking building.
MCCALLEN, David B. (Livermore, CA), COATES, Jason (Chico, CA), REPANICH, Nick (Chico, CA), WATTENBURG, William Harvey (Chico, CA)
LAWRENCE LIVERMORE NATIONAL SECURITY, LLC (Livermore CA)
15/ 509,757
April 27, 2016
STATEMENT AS TO RIGHTS TO APPLICATIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT [0002] The United States Government has rights in this application pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC for the operation of Lawrence Livermore National Laboratory.