结合工程应用数据，对全聚焦相控阵超声和双晶聚焦纵波斜探头超声两种技术的粗晶焊缝质量检测结果进行了对比分析，得到两种技术的信噪比数据、缺陷检出能力数据以及扫查覆盖能力的评价结果，指出了全聚焦相控阵检测技术具有覆盖范围大的特性，可减少扫查次数，提高检测速度，降低缺陷漏检的概率。

Combined with the engineering application data, the results of coarse-grained weld quality inspection by full focus phased array ultrasound and double crystal focused longitudinal wave angle probe ultrasound are compared and analyzed. The signal-to-noise ratio data, defect detection ability data and scanning coverage ability of the two technologies are obtained. It is pointed out that the full focus phased array inspection technology is characteristic of large coverage, which can reduce the scanning times and improve the detection speed, and thus decreasing the rate of undetected defects.