Optical fiber hydrogen sensor for concentrations below the lower explosive limit

Nowadays, optical fiber hydrogen sensor is one of most important potential of optical fiber sensors. Currently, there are a lot of explorations around this aspect. This paper uses experimental method to study reflective optical fiber hydrogen sensor with two-wavelength light sources. Firstly, the experimental principle was introduced. Based on the principle, experimental scheme, devices, and process are described. By the experiment, the reflectance is the output as the main result. The experiment results describes at last.

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Optical Path Analysis of the Optical Fiber Bundle Hydrogen Sensor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.130-134.4102 ◽

2011 ◽

Vol 130-134 ◽

pp. 4102-4105

Author(s):

Lu Jun Cui ◽

Hui Chao Shang ◽

Gang Zhang ◽

You Ping Chen

Keyword(s):

Optical Fiber ◽

Signal To Noise Ratio ◽

Internal Noise ◽

Hydrogen Sensor ◽

Optical Path ◽

Simulation Experiments ◽

Approximate Equality ◽

Optical Paths ◽

Optical Fiber Bundle ◽

Peak Value

The present work investigates reflectivity and optimal reflective distance of optical fiber hydrogen sensor in over 0～4000um range. The approximate equality of reflective distance in two optical paths increases signal to noise ratio for optical hydrogen sensor, the fabrication of optical path could eliminate the internal noise and external interferences, and provides higher stability for hydrogen sensor. Through a series of simulation experiments it was found that different reflective distances determine the sensitivity and amplitude response of hydrogen sensor. When the reflective distance was about 1mm in optical path, the sensitivity of optical hydrogen sensor could reach the peak value.

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Highly Sensitive Hydrogen Sensor Based on Palladium-Coated Tapered Optical Fiber at Room Temperature

Engineering Proceedings ◽

10.3390/ecsa-7-08186 ◽

2020 ◽

Vol 2 (1) ◽

pp. 8

Author(s):

Mohammed Majeed Alkhabet ◽

Saad Hayatu Girei ◽

Suriati Paiman ◽

Norhana Arsad ◽

Mohd Adzir Mahdi ◽

...

Keyword(s):

Optical Fiber ◽

Room Temperature ◽

Light Propagation ◽

Cost Effective ◽

Hydrogen Sensor ◽

X Ray ◽

Multimode Optical Fiber ◽

Casting Technique ◽

H2 Sensor ◽

Tapered Optical Fiber

This paper describes the application of a palladium (Pd)-coated tapered optical fiber in order to develop a hydrogen (H2) sensor. A transducing channel was fabricated with multimode optical fiber (MMF) with cladding and core diameters of 125 µm and 62.5 µm, respectively, in order to enhance the evanescent field of light propagation through the fiber. The multimode optical fiber was tapered from a cladding diameter of 125 µm to a waist diameter of 20 µm, waist-length of 10 mm, and down taper and up of 5 mm, and coated with Pd using the drop-casting technique. In order to establish the palladium’s properties, various characterization techniques were applied, such as Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray (EDX), and X-ray Diffraction (XRD). The developed palladium sensor functioned reproducibly at a gas concentration of 0.125% to 1.00% H2 at room temperature in the synthetic air. In this case, the response and recovery times were 50 and 200 s, respectively. Furthermore, this study demonstrated that the production of a dependable, effective, and reproducible H2 sensor by applying a basic, cost-effective method is possible.

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Research on Gas Chamber of Reflective Optical Fiber Hydrogen Sensor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.563.145 ◽

2014 ◽

Vol 563 ◽

pp. 145-148

Author(s):

Xian Ling Deng ◽

Chuan De Zhou ◽

Liang Li ◽

Kang Cheng

Keyword(s):

Optical Fiber ◽

Tilt Angle ◽

Gas Flow ◽

Optical Loss ◽

Hydrogen Sensor ◽

Sensor Sensitivity ◽

Design Requirements ◽

Gas Chamber

Gas chamber is one of the most important problems of the optical fiber hydrogen sensor, which directly affects the quality of the sensor sensitivity. For reflective optical fiber hydrogen sensor, the gas chamber was researched in this paper. First, the gas chamber structure and optical loss for reflective optical fiber hydrogen sensor was analyzed. Then design requirements to the gas chamber were discussed, including isolation the gas flow of reference part and measurement part, distance of the probe and the reflector, the tilt angle of the reflector. By using the gas chamber in the reflective optical fiber hydrogen sensor, it illustrates better effect.

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Optical fiber hydrogen sensor based on core diameter mismatch and annealed Pd–Au thin films

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2007.01.036 ◽

2007 ◽

Vol 125 (1) ◽

pp. 66-71 ◽

Cited By ~ 60

Author(s):

Donato Luna-Moreno ◽

David Monzón-Hernández ◽

Joel Villatoro ◽

Gonçal Badenes

Keyword(s):

Thin Films ◽

Optical Fiber ◽

Hydrogen Sensor ◽

Core Diameter ◽

Au Thin Films

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A New Analyzer Based on Pellistor Sensor with Neural Network Data Postprocessing for Measurement of Hydrocarbons in Lower Explosive Limit Range

Journal of Automated Methods and Management in Chemistry ◽

10.1155/jammc.2005.55 ◽

2005 ◽

Vol 2005 (2) ◽

pp. 55-57

Author(s):

Radoslaw Bandomir ◽

Mariusz Krawczyk ◽

Jacek Namiesnik

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Development Work ◽

Network Data ◽

Stage Of Development ◽

New Type ◽

Artificial Neural ◽

Concentration Measurements ◽

Explosive Limit ◽

Lower Explosive Limit

We present the results of a first stage of development work on a new type of analyzer for hydrogen and C1–C3hydrocarbons concentration measurements in the lower explosive limit range, based on single pellistor sensor with artificial neural network data postprocessing.

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