Realizácia projektu “Výrobková inovácia v Sylex, s.r.o. nákupom špičkového know-how” bola ukončený k[more]
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SYLEX s.r.o.
Mlynské luhy 31
821 05 Bratislava
Slovak Republic
GPS coordinates:
480 9‘ 24“ N, 170 10‘ 53“ E
Phone: +421-2 4820 1811
FAX: +421-2 4820 1819
E-mail: sales(at)sylex.sk
Features of FO sensors
Fiber optical sensors offer several significant advantages over conventional electrical sensors. The most important advantages are:
They're rugged passive components resulting in a high life time (25 years).
They form an intrinsic part of the fiber optic cable that can transmit the measurement signal over several tens of kilometers.
They show no interference with electromagnetic radiation, so they can function in many hostile environments where conventional sensors would fail.
They don't make use of electrical signals what makes them explosion safe.
They have the ability to multiplex many sensors using only one optical fibre, driving down the cost of complex network configurations.
Comparasion between FO and electric sensors
Features | Fibre Optic | Electric |
EM-radiation | Immune | EM-sensitive |
Lightning / electric discharge | Lightning and discharge proof | May cause damage or complete failure |
Electric conductivity | Non-conductive and hence no special precautions needed for outdoor use or usage under water | All wiring needs to be hermetically sealed for outdoor use or usage under water |
Explosion Safety | Spark-free and hence safe in potentially explosive atmospheres | Hazardous in explosive atmospheres |
Measurement distance | Up to tens of kilometers | Limited in range without any additional amplification |
Multiplexing | Possible to multiplex, | No multiplexing capability in series configuration |
i.e. multiple sensors can be allocated within the same optical fibre | ||
Weight | Low in weight: | Becomes heavy for large numbers of sensors because of the copper wiring |
fibres are lightweight and | ||
number of cables can be limited | ||
Installation and Sensor Read-out | Fast (< 20 ‘ per sensor) | Time consuming (extra wiring) |
Easy (can be done by non-experts; no extra wiring required) | Requires skilled and experienced workers | |
Fatigue resistance | Excellent fatigue resistance: | Similar performance not possible with electrical gages |
negligible effects for at least 2 million cycles for +/- 0.24 % straining | ||
Price (sensor + read-out) | Becomes more cost-effective for more sensors. Break even point already for 20 sensors | Price scales linearly with the number of sensors since every sensor needs a separate read-out channel |
Other Temperature Induced Effects | None | Resistive heat generation resulting into measurement errors. |
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