【摘要】 薄层结构超声测厚过程中,薄层上下界面回波叠加导致信号难以区分。针对该难点本研究采用基于Marr小波的小波变换模极大值法对250~350μm的ZrO2陶瓷涂层进行了厚度测量。所得结果与金相法测量结果相符。更多还原

【Abstract】 It is difficult to recognize the overlapping signal of the front and bottom echoes from the thin layer structure. In order to measure the thickness of the thin layer, wavelet transform modulus maxima method based on Marr wavelet is utilized for the ZrO₂ ceramic coating with the thickness ranging from 250μm to 350μm.The results of ultrasonic method accords with that of metallographical results.更多还原