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本文介绍检查中小直径圆柱体近表面缺陷的一种方法。该方法依据一次底波(B_1波)和二次底波(B_2波)之间的变型波(M 波)的变化来发现缺陷,而不是依据超声波探伤中通常使用的缺陷回波(F 波)。并简要地讨论了这种方法的一些特点。
This article describes a method of inspecting near-surface defects in small and medium diameter cylinders. This method not only relies on the defect echo (F wave) commonly used in ultrasonic flaw detection but also based on the variation of the deformed wave (M wave) between the primary bottom wave (B_1 wave) and the second bottom wave (B_2 wave) . And briefly discusses some of the features of this method.