Intelligent fiber optic sensor head working condition analysis

2003 ◽  
Author(s):  
Michal Borecki
Keyword(s):  
Fiber Optic ◽  
Working Condition ◽  
Fiber Optic Sensor ◽  
Sensor Head ◽  
Optic Sensor

New Frontiers for Mid-Infrared Sensors: Towards Deep Sea Monitoring with a Submarine FT-IR Sensor System

2003 ◽  
Vol 57 (6) ◽  
pp. 591-599 ◽  
Author(s):  
Martin Kraft ◽  
Michael Jakusch ◽  
Manfred Karlowatz ◽  
Abraham Katzir ◽  
Boris Mizaikoff
Keyword(s):  
Fiber Optic ◽  
Field Tests ◽  
Pollution Monitoring ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Modular System ◽  
Remotely Operated Vehicle ◽  
Sensor Head ◽  
Optic Sensor ◽  
Ft Ir

A sub-sea deployable fiber-optic sensor system for the continuous determination of a range of environmentally relevant volatile organic compounds in seawater has been developed. The prototype of a robust, miniaturized Fourier transform infrared (FT-IR) spectrometer for in situ underwater pollution monitoring was designed, developed, and built in our research group. The assembled instrument is enclosed in a sealed aluminium pressure vessel and is capable of maintenance-free operation in an oceanic environment down to depths of at least 300 m. The whole system can be incorporated either in a tow frame or a remotely operated vehicle (ROV). A suitable fiber-optic sensor head was developed, optimized in terms of sensitivity and hydrodynamics, and connected to the underwater FT-IR spectrometer. Due to a modular system design, various other sensor head configurations could be realized and tested, ensuring facile adaptation of the instrument to future tasks. The sensor system was characterized in a series of laboratory and simulated field tests. The sensor proved to be capable of quantitatively detecting a range of chlorinated hydrocarbons and monocyclic aromatic hydrocarbons in seawater down to the low ppb (μg/L) concentration range, including mixtures of up to 6 components. It has been demonstrated that varying amounts of salinity, turbidity, or humic acids, as well as interfering seawater pollutants, such as aliphatic hydrocarbons or phenols, do not significantly influence the sensor characteristics. In addition, the sensor exhibits sufficient long-time stability and a low susceptibility to sensor fouling.

scholarly journals ZnO ALD-Coated Microsphere-Based Sensors for Temperature Measurements

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4689
Author(s):  
Paulina Listewnik ◽  
Mikhael Bechelany ◽  
Jacek B. Jasinski ◽  
Małgorzata Szczerska
Keyword(s):  
Experimental Data ◽  
Zinc Oxide ◽  
Fiber Optic ◽  
Atomic Layer ◽  
Temperature Measurements ◽  
Fiber Optic Sensor ◽  
Central Wavelength ◽  
Sensor Head ◽  
Optic Sensor ◽  
Layer Deposition

In this paper, the application of a microsphere-based fiber-optic sensor with a 200 nm zinc oxide (ZnO) coating, deposited by the Atomic Layer Deposition (ALD) method, for temperature measurements between 100 and 300 °C, is presented. The main advantage of integrating a fiber-optic microsphere with a sensing device is the possibility of monitoring the integrity of the sensor head in real-time, which allows for higher accuracy during measurements. The study has demonstrated that ZnO ALD-coated microsphere-based sensors can be successfully used for temperature measurements. The sensitivity of the tested device was found to be 103.5 nW/°C when the sensor was coupled with a light source of 1300 nm central wavelength. The measured coefficient R2 of the sensor head was over 0.99, indicating a good fit of the theoretical linear model to the measured experimental data.

Fiber Optic Sensor for Measuring Rotation

2011 ◽  
Vol 14 (4) ◽  
pp. 66-72 ◽  
Author(s):  
S.M. Al-Hilly ◽  
◽  
Z. E. Khaleel ◽  
A.F. Alrubaye ◽  
◽  
...  
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Optic Sensor
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