What Is Fiber Optic Sensing?

The use of fiber optic sensing (abbreviated FOS) provides for a variety of applications substantial advantages. The fiber optic is resistant to electric- and electro magnetic radiation, hence the usage of the system is possible in areas where electrical system will fail. The measuring resolution , e.g. the monitoring of elongations, is in the area of μm, which can measure the smallest relative changes of the measured value. The measurement accuracy lies within the threshold of a few percent, depending on the measurement principal. Due to the high sensitivity of the measurement principal it is possible to measure tiny changes in the measurement parameter with a high precision.

After the installation the measurement system delivers permanent measurement data, which is transferred to the user via data transmission. No electric power or data transmission systems are needed at the point of measurement. The measurement data is transmitted from the point of measurement via optical fiber up to 50 km (31 miles) to a central measurement unit.

Because of the permanent delivery of measurement data, it is possible to forecast trends for the measurement value.

Advantages of
Fiber Optic Sensing Technology

  • Small size and lightweight
  • Insensitivity to external perturbations: EM fields, MW radio-frequency & lightning, humidity, etc.
  • Sensors can be integrated in the compound
  • No need for electrical power
  • High sensitivity
  • Multifunctional: great variety in measureable parameters
  • Durability and reliability in demanding environments
  • Long lifetime
  • Both point and distributed sensing

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Ing. Günther Neunteufel