摘要
用联合时频分析方法将一维磁场时域信号扩展到时间—频率的二维平面,通过Wigner-Ville分布的时频平面对铝合金点焊过程中感应磁场信号进行分析,联合时频分析可以更直观地剖析点焊熔核成形的能量分布信息,使点焊质量在线监测成为可能。
The magnetic signals are observed and compared through Wigner-Ville distribution’s time-frequency plane. And in this process the joint time-frequency analysis is used to expand one-dimension magnetic time domain signals into two-dimension plane of time-frequency. The joint time-frequency analysis provides more direct and comprehensive knowledge of the quality of nuggets, thus meeting the possibility of online monitoring of spot welding quality.
出处
《焊接技术》
北大核心
2007年第6期49-51,共3页
Welding Technology
基金
国家自然科学基金资助项目(50575159)
教育部博士学科点专项科研基金(20030056003)
教育部科学技术研究重点项目(106049)
天津市应用基础研究计划(06YFJMJC03400)
关键词
点焊
磁场
联合时频分析
spot welding, magnetic field, joint time-frequency analysis
