Fiber Optic for Perimeter Security

The Types of Fiber Optic Sensors

Recently, fibre optical sensors (FOS) have gained increased popularity and market acceptance.

In comparison to conventional sensors they offer a number of distinct advantages which makes them unique for certain types of applications, mainly where conventional sensors are difficult or impossible to deploy or can not provide the same wealth of information.

According to the spatial distribution of the measurand (the quantity to be measured), FOS can be classified as:

• Point sensors: the measurement is carried out at a single point in space, but possibly multiple channels for addressing multiple points.
• Integrated sensors: the measurement averages a physical parameter over a certain spatial section and provides a single value. An example is a deformation sensor measuring strain over a long base length.
• Quasi-distributed or multiplexed sensors: the measurand is determined at a number of fixed, discrete points along a single fibre optical cable.
• Distributed sensor: the parameter of interest is measured with a certain spatial resolution at any point along a single optical cable.

Source: sensorland

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