On-line process control monitoring system

Patent · 31 December 1991

OSTI ID:868394

O'Rourke, Patrick E ^[1]; Van Hare, David R ^[2]; Prather, William S ^[3]

---

1. Martinez, GA
2. Aiken, SC
3. Augusta, GA

An on-line, fiber-optic based apparatus for monitoring the concentration of a chemical substance at a plurality of locations in a chemical processing system comprises a plurality of probes, each of which is at a different location in the system, a light source, optic fibers for carrying light to and from the probes, a multiplexer for switching light from the source from one probe to the next in series, a diode array spectrophotometer for producing a spectrum from the light received from the probes, and a computer programmed to analyze the spectra so produced. The probes allow the light to pass through the chemical substance so that a portion of the light is absorbed before being returned to the multiplexer. A standard and a reference cell are included for data validation and error checking.

• Research Organization: WESTINGHOUSE SAVANNAH RIVER CO
• DOE Contract Number: AC09-89SR18035
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5131746
• OSTI ID: 868394
• Country of Publication: United States
• Language: English

Related Subjects

/356/
absorbed
allow
analyze
apparatus
array
based
based apparatus
carrying
carrying light
cell
checking
chemical
chemical process
chemical processing
chemical substance
comprises
computer
concentration
control
data
diode
diode array
error
fiber-optic
fibers
included
light
light source
location
locations
monitoring
multiplexer
on-line
on-line process
optic
optic based
optic fiber
optic fibers
pass
plurality
portion
probe
probes
process
process control
processing
produced
producing
programmed
received
reference
reference cell
returned
series
source
spectra
spectrophotometer
spectrum
standard
substance
switching
validation