Abstract To measure the line recession of thermal protection materials on stagnation aero of hypersonic vehicle, an optical method of projective recession measurement (PRM) is described. The line recession was obtained by calibrating the proportional coefficient between camera and model, collecting ablative video of model and image processing. The method was applied to measure 4 materials under two states, the frequency of the measurement is 25Hz, and the error of the measuring results is less than 0.16mm. The measuring results can be applied to ablation analysis.
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2016, Vol. 37 
