Methods and arrangement for the determination of crack-depths in ultrasonic non destructive testing
Methods and arrangement for the determination of crack-depths in ultrasonic non destructive testing
复制标题
超声波无损检测中裂纹深度测定方法和装置
DOI：
10.1121/1.383455
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发表时间：
1979
影响因子：
2.4
通讯作者：
E. Schulz
中科院分区：
文献类型：
--
作者：
H. Wustenberg;E. Schulz
一种通过超声波材料测试确定物体中缺陷的深度传播的方法，其中具有超声波发射振荡器的第一角度探头在形成有缺陷的物体的结构不均匀处产生散射信号，并且该散射信号由第二角度探头的超声波接收振荡器接收，该方法包括：沿沿着第一线以第一角度朝缺陷方向发射超声波，使得该处的散射信号被缺陷遮蔽并且强度减弱;在沿着与缺陷处的第一线相交的第二线的方向上以第二角度从缺陷接收减弱的信号，发射附加的超声波，并沿沿着在所述主体的不同深度处的所述缺陷处相交的相应的线接收减弱的散射信号，并且当所述散射信号的相交处的所述信号的强度显著增加时，通过所接收的信号的强度的显著增加来确定所述缺陷的深度传播。发射超声波和接收散射信号所沿的相应线沿着到达缺陷的最内极限之外。
A method of determining depth propagation of a defect in a body by ultrasonic materials testing wherein a first angle probe having an ultrasonic wave transmitting oscillator produces a scatter signal at structural inhomogeneities of a body formed with a defect and the scatter signal is received by an ultrasonic wave receiving oscillator of a second angle probe, which includes: transmitting an ultrasonic wave at a first angle along a first line in direction towards the defect so that the scatter signal thereat is shadowed by the defect and diminished in intensity; receiving the diminished signal from the defect at a second angle in a direction along a second line intersecting with the first line at a defect, transmitting additional ultrasonic waves and receiving diminished scatter signals along respective lines intersecting at the defect at varying depths of the body and ascertaining the depth propagation of the defect by a marked increase in intensity of the received signal when the intersection of the respective lines along which the ultrasonic wave is transmitted and the scatter signal is received reach beyond the innermost limit of the defect.