For purpose of measuring dynamic change of the temperature inside fireballs in explosion fields,an endoscope temperature-measuring system based on colorimetric temperature measurement was designed.Through building a mechanical collimating optical system,the spectral radiation energy within the fireball was accurately collected.In addition,through combined with the radiation spectral intensity curve,analyz-ing the relationship between detector's wavelength sensitivity and the radiation spectral intensity,multiple sets of dual bands were selected for the simulation and finally,the curves of 810 nm and 940 nm bands were selected.Considering the fact that the rapid explosion process increases the radiation energy sharply and with a view to ensuring signal of the measurement system not saturated,the dynamic gain module was used to realize the temperature measurement with wide dynamic range.Compared with the calibration re-sults shows that,the relative error can be less than 5％,and the temperature range of the explosion fireball measured by the outdoor experiment ranges from 1 500 ℃ to 2 700 ℃,which provides a new technical means for studying the internal temperature law of the transient explosion fireball.
关键词
比色测温/爆炸温度场/爆炸火球/瞬态高温
Key words
colorimetric temperature measurement/explosion temperature field/explosive fireball/tran-sient high temperature
维普
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