Methods and devices for sensing temperature and oxygen pressure with a single optical probe

摘要

Method and devices for measuring spot temperatures and surface temperature distributions using a luminophor, and method and devices for determining temperature-corrected oxygen or surface air pressure distributions using the same oxygen-sensitive luminophor. The luminophor is excited sequentially by a first light of wavelengths lambd1 and intensity P1 and a second light of wavelengths lambdv and intensity PT., generating a first luminescence light of intensity I1 and a second luminescence light of intensity IT, respectively. The absorption of light of wavelength lambdv is substantially temperature-dependent in such a manner that the ratio (IT.P1/I1.PT) increases substantially in a known manner with increasing temperature, substantially independent of any oxygen pressure, and the oxygen pressure can be determined as a function of the luminescence decay time.