COHERENT LASER REMOTE STRUCTURAL ANALYSIS

Award Information
Agency: National Science Foundation
Branch: N/A
Contract: N/A
Agency Tracking Number: 14401
Amount: $252,796.00
Phase: Phase II
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Science Research Laboratory
15 Ward St, Somerville, MA, 02143
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr. Allen Flusberg
 Principal Research Scientist
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
LARGE STRUCTURES REQUIRE PERIODIC ROUTINE INSPECTION TO DETECT MECHANICAL FLAWS BEFORE THEY LEAD TO SIGNIFICANT DAMAGE AND DANGEROUS CONDITIONS. CONVENTIONAL INSPECTIONS ARE TIME CONSUMING, EXPENSIVE, AND LABOR INTENSIVE. INEXPENSIVE, REMOTE INSPECTION OF LARGE STRUCTURES WOULD THUS BE ECONOMICALLY BENEFICIAL AND WOULD FREE RESOURCES TO BE APPLIED TO IMPROVED MAINTENANCE AND REPAIR. WORK CONDUCTED RECENTLY ON MODAL ANALYSIS HAS SHOWN THAT STRUCTURAL CHANGES MAY BE IDENTIFIED BY ANALYZING CHANGES INTHE VIBRATION SPECTRUM OF A STRUCTURE. WE PROPOSE TO USE COHERENT LASER DETECTION, A TECHNIQUE ON WHICH THE LASER VIBROMETER IS BASED, TO COMPLEMENT MODAL ANALYSIS, THEREBY ALLOWING THE REMOTE INSPECTION OF LARGE STRUCTURES FOR FLAWS. A MAJOR ADVANTAGE OF THE LASER TECHNIQUE IS THE ABILITY TO PINPOINT STRUCTURAL ELEMENTS BY AIMING THE LASER AT EACH INDIVIDUALLY. THIS APPLICATION OF COHERENT DETECTION WILL STIMULATE DEVELOPMENT OF STATE-OF-THE-ART LASER-BASED SYSTEMS WITH NEW, SIGNIFICANT COMMERCIAL APPLICATIONS WHICH WILL BENEFIT THE US ECONOMY.

* information listed above is at the time of submission.

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