Road traffic monitoring system
First Claim
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1. A traffic monitoring system, the system comprising at least one sensor station (2) and an interferometric interrogation system (9);
- wherein the at least one sensor station comprises at least one optical fibre sensor (5) deployed in a highway (10); and
wherein the interferometric interrogation system is adapted to respond to an optical phase shift produced in the at least one optical fibre sensor due to a force applied by a vehicle passing the at least one sensor station characterised in that the interferometric interrogation system comprises a Rayleigh backscatter Interferometric interrogation system.
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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 fibre sensor (5) deployed in a highway (1); and wherein the interferometric interrogation system (9) is adapted to respond to optical phase shift produced in the respond to an optical phase shift produced in the at least one optical fibre sensor.
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Citations
37 Claims
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1. A traffic monitoring system, the system comprising at least one sensor station (2) and an interferometric interrogation system (9);
- wherein the at least one sensor station comprises at least one optical fibre sensor (5) deployed in a highway (10); and
wherein the interferometric interrogation system is adapted to respond to an optical phase shift produced in the at least one optical fibre sensor due to a force applied by a vehicle passing the at least one sensor station characterised in that the interferometric interrogation system comprises a Rayleigh backscatter Interferometric interrogation system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
- wherein the at least one sensor station comprises at least one optical fibre sensor (5) deployed in a highway (10); and
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30. A method for monitoring traffic, the method comprising providing a plurality of sensor stations on a highway;
- deploying a plurality of optical fibre sensors at each sensor station;
interfacing each optical fibre sensor to an interferometric interrogation system, employing time division multiplexing such that the interrogation system is adapted to monitor an output of each optical fibre sensor substantially simultaneously; and
using the output of each optical fibre sensor to derive data relating to the traffic passing each sensor station, characterised in that the interferometric interrogation system is a Rayleigh backscatter interferometric interrogation system. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
- deploying a plurality of optical fibre sensors at each sensor station;
Specification