Fiber-optic based traffic and infrastructure monitoring system

  • US 10,458,818 B2
  • Filed: 05/09/2017
  • Issued: 10/29/2019
  • Est. Priority Date: 05/09/2016
  • Status: Active Grant
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First Claim
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1. An arrangement comprising:

  • a traffic infrastructure comprising;

    a traffic carrying surface to support at least one conveyance element of a vehicle, therewith allowing movements of the vehicle over the traffic carrying surface; and

    an optic sensor system comprising;

    at least one fiber optic sensor coupled to an interrogator, having at least one anchor element that extends around the at least one fiber optic sensor between an optic strain sensor element of a plurality of optic strain sensor elements, and extending at least substantially according to a straight line in a direction at least substantially parallel to the traffic carrying surface, the at least one fiber optic sensor comprising;

    an optic fiber with the plurality of optic strain-sensor elements distributed over its length, wherein the plurality of optic strain-sensor elements have mutually different optical characteristics, andthe interrogator arranged below the traffic carrying surface and being configured to;

    transmit an optical interrogation signal into the at least one fiber optic sensor,receive a response optical signal that has been modulated by the fiber optic sensor based on its optical characteristics, andidentify changes in the optical characteristics of the response optical signal resulting from strains induced in the optic strain-sensor elements as a result of the conveyance element of the vehicle moving over the traffic carrying surface across the at least one fiber optic sensor.

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