Indirect gas species monitoring using tunable diode lasers

Details Indirect gas species monitoring using tunable diode lasers Indirect gas species monitoring using tunable diode lasers

2005-02-22

2005-02-22

Tsai, Carol S W (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Measured signal processing

C702S030000, C702S031000, C702S032000, C431S079000

Reexamination Certificate

active

06859766

ABSTRACT:
A method for indirect gas species monitoring based on measurements of selected gas species is disclosed. In situ absorption measurements of combustion species are used for process control and optimization. The gas species accessible by near or mid-IR techniques are limited to species that absorb in this spectral region. The absorption strength is selected to be strong enough for the required sensitivity and is selected to be isolated from neighboring absorption transitions. By coupling the gas measurement with a software sensor gas, species not accessible from the near or mid-IR absorption measurement can be predicted.

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