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Title	DUAL CORE FTDM FIBER OPTIC WIM SYSTEM
Accession No	00802567
Authors	Malla, R B; Garrick, N W
Journal Title	NCHRP-IDEA Program Project Final Report
Period Covered	9706-9908
Corp. Authors / Publisher	Transportation Research Board
Publication Date	20001000
Description	31 p.; Figures; Photos; References(33); Tables(3)
Languages	English
Abstract	This Innovations Deserving Exploratory Analysis (IDEA) project incorporates a new optical fiber design in a weigh-in-motion (WIM) system and tests its performance under simulated highway conditions. The fiber design consists of a dual core system using two light-guiding regions of different effective optical path lengths. A prototype fiber-optic WIM system was designed, fabricated and tested under both static loading and an actual vehicle. The static loading tests showed good correlation between load and changes in optical signal. The location of the load was also determined fairly accurately. Changes in optical signal under vehicle testing were similar to those under static loading. The system was further improved with attention to the optical set-up, data gathering capability and fiber optic configuration. The results show a good potential of the WIM system for determining the magnitude and location of vehicle loads. Additional refinements and prototype tests are needed before the technology will be ready for field implementation.
Supplemental Information	This NCHRP-IDEA investigation was conducted by the University of Connecticut, Storrs. The original project title was Dual Core Fiber Optics Weigh-in-Motion System.
TRT Terms	Fiber optics ; Prototype tests ; Prototypes ; Sensors ; Static and dynamic tests ; Technological innovations ; Weigh in motion
Identifier Terms	National Cooperative Highway Research Program
Subject Areas	H55 TRAFFIC FLOW, CAPACITY AND MEASUREMENTS; I72 Traffic and Transport Planning
Contract Number	NCHRP-42
Report Number	NCHRP-IDEA Project 42
Availability	National Technical Information Service Order Document: http://www.ntis.gov/search/product.aspx?ABBR=PB2001100953 Order Number: PB2001-100953
TRIS Files	HRIS
Database	TRIS Online

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