CAJ | 학술논문

为快速准确地测量涂层厚度，提出基于热图序列时间特征的红外热波技术测量方法。通过理论分析和仿真，得出涂层厚度的平方与热图序列的对数二阶微分峰值时间成正比关系，比例系数由涂层材料的热扩散系数确定，通过此关系可以测量出涂层厚度。在复合材料基体上制作了涂层试件，利用脉冲闪光灯作为激励源进行了热加载。热图显示不同厚度涂层有着明显不同的表面降温过程，涂层薄的区域降温快，冷却时间短。对热图序列进行平均、对数和二阶微分处理，计算了4块涂层的厚度和测量误差，分析了计算速度。结果表明基于热图序列时间特征的测量方法速度快，误差较小，能很好地应用于涂层厚度的快速、非接触测量。
위쾌속준학지측량도층후도，제출기우열도서렬시간특정적홍외열파기술측량방법。통과이론분석화방진，득출도층후도적평방여열도서렬적대수이계미분봉치시간성정비관계，비례계수유도층재료적열확산계수학정，통과차관계가이측량출도층후도。재복합재료기체상제작료도층시건，이용맥충섬광등작위격려원진행료열가재。열도현시불동후도도층유착명현불동적표면강온과정，도층박적구역강온쾌，냉각시간단。대열도서렬진행평균、대수화이계미분처리，계산료4괴도층적후도화측량오차，분석료계산속도。결과표명기우열도서렬시간특정적측량방법속도쾌，오차교소，능흔호지응용우도층후도적쾌속、비접촉측량。
To measure coating thickness more efficiently and accurately,Infrared thermal wave technology based on thermal image time characteristic was proposed.The square of coating thickness is indicated to be proportional to the peak time of the logarithmic second derivation in thermal image sequence by theory analysis and simulation.The coefficient is determined by the coating’s heat diffusivity. The coating thickness can be calculated by the proportional relation.The coating sample based on composite material was made and the experiment was carried out using flash lamp as heat exciting source.Thermal image sequence shows that the coatings with different thick-ness have different cooling courses.The thinner the coating is,the more quickly it cools.The thermal image sequence was processed by taking the mean,logarithm and logarithmic second derivation.Coating thickness in four positions was measured rapidly and the error was calculated.Finally the computation time consumption was estimated.The results show that the coating thickness measurement based on thermal image time characteristic has greater efficiency and less error.It is fairly feasible to utilize infrared thermal wave technology in the rapid and non-touch measurement of coating thickness.