公开(公告)号：US06710283B2

公开(公告)日：2004-03-23

申请号：US10081153

申请日：2002-02-25

申请人： Kiyokazu Mori ,  Taishi Tarui ,  Shinsuke Takemura

发明人： Kiyokazu Mori ,  Taishi Tarui ,  Shinsuke Takemura

IPC分类号： B23K2600

CPC分类号： B23K26/03 ,  B23K26/244 ,  B23K26/32 ,  B23K31/125 ,  B23K2101/006 ,  B23K2101/35 ,  B23K2103/04 ,  B23K2103/08 ,  B23K2103/50

摘要： Infrared reflection of a laser beam (LB3) irradiated on a welding part (WP) of work (5) is detected by a sensor (6a) high of elevation angle, where it is converted into an electrical signal, which is processed by a measuring circuit (MC) to be input to a quality monitor (QM), where it is stored as a data in a memory (7g), which data is processed by way of a spectral analysis, which calculates a spectral distribution of electrical signal, and a signal power sum in a particular frequency band, to be compared with a threshold value for decision on occurrence of a significant porous state.

摘要翻译： 照射在工件（5）的焊接部分（WP）上的激光束（LB3）的红外反射通过高仰角的传感器（6a）检测，其被转换成电信号，该电信号由测量 电路（MC）输入到质量监视器（QM），其中它作为数据存储在存储器（7g）中，该数据通过频谱分析进行处理，频谱分析计算电信号的频谱分布;以及 在特定频带中的信号功率和与要用于确定显着多孔状态的出现的阈值进行比较。