Fiber optic monitoring of critical infrastructure

The use of fiber optic sensors for monitoring critical infrastructure facilities:

  • trackways,
  • bridges,
  • viaducts,
  • underground passages,
  • footbridges,
  • handling (e.g. overhead traveling cranes),
  • gas pipelines, pipelines,
  • pressure tanks,
  • rock masses,
  • elements of power boilers operating up to 1000 ° C.

Purpose of the measurements:

  • measurement of deformation of an element located on unstable ground,
  • acceptance of the structure prior to its admission to operation after completion of construction,
  • assessment of the load-bearing capacity of structures already in use and in operation for some time, for which there are doubts related to their technical condition,
  • research related to the introduction of new design or technological solutions,
  • the need to increase the load capacity of the structure,
  • measurement of deformation at extreme temperatures (up to 1000 ° C).

Critical infrastructure monitoring technology

Our system for monitoring critical infrastructure facilities is based on an innovative fiber optic technology and two measurement systems:

  1. FBG point sensors (Fiber Bragg Grating),
  2. linear Rayleigh sensors,

which are characterized by:

  • intrinsically safe,
  • no need for calibration,
  • long life cycle (up to 20 years),
  • the possibility of serial connection of individual measurement points on one optical fiber,
  • wiring reduction in relation to strain gauges.

Depending on the individual structure of a given object, sensors based on fiber optic technology (FBG and Rayleigh) are mounted directly to selected structural elements and allow measurement of such structural stress parameters as: deformation, stress, displacement and temperature with micrometric accuracy.

In addition, the system can automatically notify the relevant facility services in the event of exceeding the set critical threshold values.

In addition, the Company has a long-life, high-temperature stress and temperature measurement system based on single-mode optical fiber (SM), used in environments up to 1000 ° C. Designed to monitor deformation, stress and temperature from 1 to 1000 points / 1m of fiber in difficult conditions. Designed for power plants, nuclear facilities, oil and gas, aviation, railways, civil and geotechnical engineering, roads and advanced vehicles, gears, marine vessels and racing yachts, wind turbines and structures, pipelines, industrial processes and research laboratories worldwide.

Advantages of the fiber optic measuring system:

  • 24/7 monitoring,
  • ease of installation,
  • real-time measurement of deformation, stress, displacement and temperature,
  • long-term stability of the measurement system,
  • high sensitivity and micrometric accuracy of fiber optic sensors,
  • static and dynamic measurements up to 2kHz,
  • warnings and automatic notifications,
  • graphical presentation of the measurement results,
  • can be used for various technologies (steel, reinforced concrete),
  • the ability to assess the degree of wear of the structure in the long run,
  • the possibility of reducing servicing costs.

Parameters

Specification

Linear sensor based on Rayleigh backscatter

Number of measurement points for one optical fiberu

100 for every 1m of fiber

Maximum temperature measurements

Up to 1000 C

Maximum temperature for deformation measurements             

Up to 600 C

Maximum time of HT deformation measurement           

Up to 360 dni

Deformation accuracy  

+/- 1 µƐ

Temperature accuracy  

+/- 0,1 C

Single point sensor based on FBG technology

Number of measurement points for one optical fiber

From 1 to 24

Maximum temperature measurements

Up to1000 C

Maximum temperature for deformation measurements             

Up to 600 C

Maximum time of HT deformation measurement

Up to 360 dni

Precision of deformation

+/- 1 µƐ

Temperature accuracy

+/- 0,1 C

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