Fibre Optic Sensing

Getec and Sylex partner to provide a first class  supply , design and installation service for all applications relating to structural health monitoring using fiber optic sensing . We have worked closely together for the last 4 years and have developed bespoke systems and sensors together. The Getec and Sylex partnership have developed a unique modular asset monitoring  for sewers and tunnels that has been used successfully in London and Berlin for assests over large diameter tunnel drives.

Our full range of sensing products are located here. We will be more than pleased to assist you in selecting the correct instrument and accessory for your project.

Fibre optic technology is a new innovative method of measuring strains in structures and geotechnical processes. Getec uses fibre bragg technology  manufactured by Sylex which is more flexible for on -site installations as it does not require to installed in a taught state.  The advantages of using fibre optics, especially for sewer monitoring is that it is in an intrinsically safe method of measurement and will read micro strain directly  and real time. The fibre optic unit  has a high life time in situ and requires no individual calibration.

Advantages of FBG sensors Sensing systems based on FBG technology have numerous advantages compared to conventional electrical sensors. The sensor itself acts as a passive component in the sensing network allowing the integration of the sensing system and sensor even inside explosive environments where any electrical signal or sparking is prohibited. Fiber optic sensors use light as the signal carrier, rather than electric current as in conventional sensors, which renders them immune to interference from electrostatic, electromagnetic and radio sources. The sensor can also be exposed to extreme temperatures and operate in harsh environments. Data transfer via fiber optics is already a standard in the telecommunication industry due to its wide broadband, low loss and the ability to carry the signal over long distances without needing an amplifier. Sensing systems based on FBG technology use this reliable medium to carry data acquired from both the sensors and the sensing element. The advantage of combining fiber optic technology with FBG technology is that it provides long term stability to the sensor and removes the need to recalibrate over time. The sensing element in FBG based sensors has very small dimensions and therefore our sensors can be customized and mounted on structures with minimal modification or effect on the structure’s behaviour Electrical sensors require a dedicated channel and cable for each sensor in order to acquire data, leading to very complex solutions when monitoring large structures. With sensors based on FBG technology, multiplexing allows many tens of FBGs to be integrated in a single optical fiber. Each grating can act as an independent sensing element, which greatly simplifies large structure monitoring. This generates significant installation cost and time savings. In addition all of the fibers can be connected to a single read-out unit (FBG interrogator). An FBG sensing element is capable of measuring strain and temperature. Using different transducer mechanisms they are able to measure several other physical quantities, like; pressure, displacement, force, load, acceleration, inclination, etc.

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