Road traffic monitoring system

Details Road traffic monitoring system Road traffic monitoring system

2006-05-09

2006-05-09

Lieu, Julie Bichngoc (Department: 2636)

Communications: electrical

Vehicle detectors

Photoelectric

C340S933000, C340S934000, C340S935000, C340S936000, C385S012000, C385S014000, C385S031000, C385S032000, C385S034000, C385S054000

Reexamination Certificate

active

07042369

ABSTRACT:
A traffic monitoring system comprises at least one sensor station (2) and an interferometric interrogation system (9); wherein the at least one sensor station (2) comprises at least one optical fiber sensor (5) deployed in a highway (1); and wherein the interferometric interrogation system (9) is adapted to respond to an optical phase shift produced in the at least one optical fiber sensor (5) due to a force applied by a vehicle passing the at least one sensor station (2).

REFERENCES:
patent: 5026141 (1991-06-01), Griffiths
patent: 5056884 (1991-10-01), Quinlan, Jr.
patent: 5194847 (1993-03-01), Taylor et al.
patent: 5260520 (1993-11-01), Muhs et al.
patent: 5446291 (1995-08-01), Becker et al.
patent: 2 673 749 (1992-09-01), None
patent: 2 703 451 (1994-10-01), None
Patent Abstracts of Japan; vol. 1998, No. 11, Sep. 30, 1998; & JP 10 148586 A, Jun. 2, 1998.

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