Features of fiber optic sensors
Different from traditional sensors, the excellent physical, chemical, mechanical and transmission properties of optical fibers make optical fiber sensors small in size, light in weight, anti-electromagnetic interference, anti-corrosion, high sensitivity, wide measurement bandwidth, and can detect electronic equipment and sensors. It has the advantages of being far apart, and can form a sensor network.
The sensitivity of advanced fiber optic sensors is several orders of magnitude higher than that of traditional sensors, and more than 70 physical quantities can be measured. In summary, it has the following advantages:
1. High precision, fast response speed, wide linear characteristic range, good repeatability in use, and high signal-to-noise ratio of the detection signal. Due to the mass production of optical fiber, the price is low, and it can be widely used.
2. The optical fiber is made of quartz, which is a dielectric material, and transmits optical signals, so it has good safety, reliability, and strong anti-electromagnetic interference ability. It can adapt to flammable, explosive or toxic environments such as electric power, petroleum, chemical, metallurgy, etc. Work under conditions.
3. Strong anti-corrosion and anti-pollution ability, can be used in places with large temperature difference, with excellent time and time aging characteristics, and long working life.
4. Small size, light weight, easy to install, and strong adaptability to the environment of the tested object.
5. The optical fiber is a passive device with good independence and will not destroy the measured state.
6. A wide range of measurement objects. At present, there are a variety of optical fiber sensors with different performances that measure temperature, pressure, displacement, velocity, liquid level, nuclear radiation and other physical quantities, chemical quantities, biomass, etc.
7. It is convenient for multi-point multiplexing, with low transmission loss, and is suitable for forming a measurement network to realize multi-point real-time intelligent telemetry.
