United States of America As Represented by the Secretary of the Air Force

Innovative Scientific Solutions, Inc.

Larry P Goss

Biswa N Ganguly

William M Roquemore

Benjamin Sarka

Jessica R Webb

Nikolay Rogoshchenkov

Sigmund W Kizirnis

Darryl D Trump

Robert A Forlines

Jimmy W Crafton

Stephen J Palluconi

Grant R McMillan

Dennis F Grosjean

An oxygen number density or concentration sensor including a sampling luminescent oxygen probe located in a fluid environment, and a gas impermeable enclosure located in the fluid environment and a reference luminescent oxygen probe located within the gas impermeable enclosure, wherein the sampling and reference luminescent oxygen probes are formed by an ideal PSP. A predetermined fixed oxygen number density or concentration is provided within a medium contained in the gas impermeable enclosure. A detector receives signals corresponding to luminescent emissions of the sampling and reference probes. A processor determines a number density or concentration of oxygen in the fluid environment from a signal generated at the sampling probe with reference to an oxygen number density or concentration dependent signal generated at the reference probe.

Measurement of oxygen

Fiber optic probe apparatus usable for measuring temperatures with increased dynamic range and frequency domain response and desirable measurement accuracy. A black body signal source, fiber optic signal coupling, and extension of the transducer dynamic range with optical multiplexing are employed; the instrument operates in the range of 1.6 micrometers of optical energy wavelength and preferably employs recently improved indium gallium arsenide photodiode transducer devices and transducer frequency domain compensation. Use of the instrument in measuring combustion flame transient temperatures is disclosed.

Fiber optic pyrometry with large dynamic range

A novel laser beam deflection system and method for temperature measurement of combustion flames of known composition is described which comprises a thin wire for placement at a predetermined location within the flame; a pulsed laser source for directing a pulsed beam onto the wire for heating the wire and immediately surrounding gases of the flame to produce an acoustic pulse in the flame; a pair of probe laser sources for directing parallel probe beams through the flame in predetermined spaced relationship to each other and to the wire, and a pair of detectors and associated electronics for detecting the respective deflections of the probe beams resulting from interactions with the pulse and measuring the time difference between respective deflections of the probe beams to determine the speed of the acoustic pulse through the flame and the temperature of the flame from the speed determination.

Non-perturbing beam deflection system and method for high repetition

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Beavercreek, OH, United States of America

Larry P Goss