Road traffic monitoring system
First Claim
1. A traffic monitoring system, the system comprising:
- at least one sensor station, wherein the at least one sensor station comprises at least one optical fibre sensor deployed in a highway, wherein the at least one optical fibre sensor comprises;
a former,an optical fibre wound on the former,a casing anda compliant material provided between the casing and the former;
such that the compliant material reduces the sensitivity of the sensor; and
an interferometric interrogation system, wherein the interferometric interrogation system is responsive 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.
2 Assignments
0 Petitions
Accused Products
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); wherein the at least one optical fibre sensor (5) comprises a former (14), an optical fibre (13) wound on the former, a casing (15) and compliant material (16) provided between the casing and the former; such that the compliant material reduces the sensitivity of the sensor (5); and wherein the interferometric interrogation system (9) 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 (2).
-
Citations
25 Claims
-
1. A traffic monitoring system, the system comprising:
-
at least one sensor station, wherein the at least one sensor station comprises at least one optical fibre sensor deployed in a highway, wherein the at least one optical fibre sensor comprises; a former, an optical fibre wound on the former, a casing and a compliant material provided between the casing and the former;
such that the compliant material reduces the sensitivity of the sensor; andan interferometric interrogation system, wherein the interferometric interrogation system is responsive 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method for monitoring traffic, the method comprising the steps of:
-
providing a plurality of sensor stations on a highway; deploying a plurality of optical fibre sensors at each sensor station;
wherein each optical fibre sensor comprises;a former, an optical fibre wound on the former, a casing and a compliant material provided between the casing and the former;
such that the compliant material reduces the sensitivity of the sensor;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. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
-
Specification