基于磷光强度比的高温表面温度测量技术

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关键词：磷光强度比；温敏磷光涂层；非接触测温；表面温度分布中图分类号：TB942；0551.2 文献标识码：ADOI：10.37188/CJL.20250134 CSTR：32170.14.CJL.20250134

Abstract：To enhance the upper temperature measurement limit and accuracy of phosphor thermometry for two-dimensional surface temperature measurement，this study employed high-temperature solid-state reaction and chemical bonding methods to fabricate Dy 3+ -doped YAG/YAP phosphor coatings with higher temperature sensitivity.Based on the principle thatthe intensity ratioofcharacteristic phosphor emission peaks is temperature-sensitive，phosphor intensity ratio versus temperature calibration curves were established.Building upon this，a phosphor thermometry system was developed for mapping surface temperature distributions in hightemperature environments.Comparative temperature measurement experiments were conducted with an infrared thermographic camera.The results demonstrate thatthis system exhibits excellent performancefor 2D temperature distribution measurement within the range of 650-1 30o K，with a maximum measurement error of （204号 1，24% and a system uncertainty of 1.6O K. It shows considerable application potential for surface temperature measurement of high-temperature targets such as in supersonic wind tunnels and hot-end components of aero-engines.

Key words：phosphorescent intensityratio；temperature sensitivephosphorescent coating；non-contact thermometry；surface temperature distribution

1引言

在航空发动机、超声速风洞等高温、高压、高振动的复杂严苛的测温环境中，传统的测温技术如热电偶、辐射测温等并不能精确、安全地完成测温任务。（剩余18309字）