Fiber optic hydrogen sensor
Abstract
Apparatus and method for detecting a chemical substance by exposing an optic fiber having a core and a cladding to the chemical substance so that the chemical substance can be adsorbed onto the surface of the cladding. The optic fiber is coiled inside a container having a pair of valves for controlling the entrance and exit of the substance. Light from a light source is received by one end of the optic fiber, preferably external to the container, and carried by the core of the fiber. Adsorbed substance changes the transmissivity of the fiber as measured by a spectrophotometer at the other end, also preferably external to the container. Hydrogen is detected by the absorption of infrared light carried by an optic fiber with a silica cladding. Since the adsorption is reversible, a sensor according to the present invention can be used repeatedly. Multiple positions in a process system can be monitored using a single container that can be connected to each location to be monitored so that a sample can be obtained for measurement, or, alternatively, containers can be placed near each position and the optic fibers carrying the partially-absorbed light can be multiplexed for rapid sequential reading, bymore »
- Inventors:
- Issue Date:
- Research Org.:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 10166457
- Patent Number(s):
- 7678520
- Application Number:
- ON: DE93015612; PAN: 7-678,520
- Assignee:
- Dept. of Energy
- Patent Classifications (CPCs):
-
G - PHYSICS G03 - PHOTOGRAPHY G03G - ELECTROGRAPHY
- DOE Contract Number:
- AC09-89SR18035
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 1991
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 47 OTHER INSTRUMENTATION; OPTICAL SPECTROMETERS; DESIGN; HYDROGEN; QUANTITATIVE CHEMICAL ANALYSIS; HYDROGEN METERS; INVENTIONS; OPTICAL FIBERS; GAS ANALYSIS; LIGHT TRANSMISSION; MULTIPLEXERS; SPECTROPHOTOMETERS; INFRARED RADIATION; 400102; 440600; CHEMICAL AND SPECTRAL PROCEDURES; OPTICAL INSTRUMENTATION
Citation Formats
Buchanan, B R, and Prather, W S. Fiber optic hydrogen sensor. United States: N. p., 1991.
Web.
Buchanan, B R, & Prather, W S. Fiber optic hydrogen sensor. United States.
Buchanan, B R, and Prather, W S. Tue .
"Fiber optic hydrogen sensor". United States. https://www.osti.gov/servlets/purl/10166457.
@article{osti_10166457,
title = {Fiber optic hydrogen sensor},
author = {Buchanan, B R and Prather, W S},
abstractNote = {Apparatus and method for detecting a chemical substance by exposing an optic fiber having a core and a cladding to the chemical substance so that the chemical substance can be adsorbed onto the surface of the cladding. The optic fiber is coiled inside a container having a pair of valves for controlling the entrance and exit of the substance. Light from a light source is received by one end of the optic fiber, preferably external to the container, and carried by the core of the fiber. Adsorbed substance changes the transmissivity of the fiber as measured by a spectrophotometer at the other end, also preferably external to the container. Hydrogen is detected by the absorption of infrared light carried by an optic fiber with a silica cladding. Since the adsorption is reversible, a sensor according to the present invention can be used repeatedly. Multiple positions in a process system can be monitored using a single container that can be connected to each location to be monitored so that a sample can be obtained for measurement, or, alternatively, containers can be placed near each position and the optic fibers carrying the partially-absorbed light can be multiplexed for rapid sequential reading, by a single spectrophotometer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1991},
month = {Tue Jan 01 00:00:00 EST 1991}
}