US 5,341,676 AGranted

Surface pressure measurement by oxygen quenching of luminescence

AssigneeBoard of Regents

InventorsMartin P. Gouterman, Janet L. Kavandi, Jean Gallery, James B. Callis

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Abstract

Methods and compositions for measuring the pressure of an oxygen-containing gas on an aerodynamic surface, by oxygen-quenching of luminescence of molecular sensors is disclosed. Objects are coated with luminescent films containing a first sensor and at least one of two additional sensors, each of the sensors having luminescences that have different dependencies on temperature and oxygen pressure. Methods and compositions are also provided for improving pressure measurements (qualitative or quantitive) on surfaces coated with a film having one or more types of sensor.

Claims31

Dependent claims

A method of measuring the pressure of an oxygen-containing gas on a surface, which comprises:

providing an aerodynamic surface coated with an oxygen-permeable film comprising sensors A and B, wherein
sensor A, upon irradiation with exciting wavelength .lambda..sub.a, produces luminescence at an emission wavelength .lambda..sub.A of intensity I.sub.A that is dependent on both temperature and oxygen pressure, and
sensor B, upon irradiation with exciting wavelength .lambda..sub.b, produces luminescence at an emission wavelength .lambda..sub.B of intensity I.sub.B that is dependent on temperature and independent of oxygen pressure;
causing an oxygen-containing gas to flow over said surface;
irradiating at least a portion of said surface with .lambda..sub.a and .lambda..sub.b, while said oxygen-containing gas is flowing over said irradiated surface;
detecting I.sub.A and I.sub.B, for a plurality of smaller areas of said irradiated surface;
and,
comparing the I.sub.A value for each smaller area to the corresponding I.sub.B value for said smaller area to calibrate said I.sub.A value to a reference temperature, thereby resulting in an indication of the pressure of said gas on said surface.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/881,121Filed 11 May 1992 · division
Priority: 20 Aug 1990
Granted: 30 Aug 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01M 9/06
Aerodynamic testing; Arrangements in or on wind tunnels: measuring arrangements specially adapted for aerodynamic testing
G01L 11/02
Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00: by…
G01M
Testing static or dynamic balance of machines or structures
G01L
Measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure

Family

Serial570,275Parent of this division · filed 20 Aug 1990
US 5,186,046 AParent of this division
US 5,341,676 AThis patent

From the US filing history. Foreign family members aren’t listed.

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