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5相控阵检测建模结果5.1 V型坡口单面焊这种焊接结构常用于屏蔽金属电弧焊,坡口角度60°,钝边高度和间隙各2mm。适于薄壁焊缝的换能器和楔块组合示例,如图4(a)所示,为消除楔块杂波,对尺寸作了限制。这对探测焊缝根部区域,确保探头接近位置最佳化,十分必要。此模式适用于壁厚5~25mm。采用5MHz,16阵元,10mm窗孔(aperture)。图4(b)则表示用于较厚壁厚的换能器和楔块组合尺寸(用5MHz,64阵元)。由于探头的可接近问题,薄壁焊缝的根部可能探测不到,即使是用折射角70°一次波(0.5s)探测亦
5 Phased Array Detection Modeling Results 5.1 V-groove single-sided welding This welding structure commonly used in shielded metal arc welding, bevel angle of 60 °, the height of the blunt edge and the gap of 2mm. Examples of combinations of transducers and wedges suitable for thin-walled welds, as shown in Figure 4 (a), limit the dimensions to eliminate wedge clutter. This is essential for probing the root area of the weld to ensure that the proximity of the probe is optimized. This mode is suitable for wall thickness 5 ~ 25mm. Using 5MHz, 16 array element, 10mm aperture (aperture). Figure 4 (b) shows the combined size of the transducer and wedge for thicker wall thickness (using 5MHz, 64 elements). Due to the probable proximity of the probe, the root of the thin-walled weld may not be detected, even with a detection of a primary wave at a refraction angle of 70 ° (0.5 s)