| 摘要: |
| 利用傅里叶级数变换对CO2焊短路过渡过程的电信号特点进行了分析,指出短路过渡过程的电信号的频率分量包含了多种频率的谐波信号,既有短路过渡本身固有的低次谐波,还有短路过渡本身固有的高次谐波和高频干扰信号。应用软阈值小波滤波的方法对CO2焊普通短路过渡和波形控制短路过渡的电信号进行了处理和研究。结果表明,选择适当的波形数据处理方法对CO2焊短路过渡过程的研究具有重要意义。 |
| 关键词: 波形控制 短路过渡 CO2焊 小波 软阈值 |
| DOI： |
| 分类号: |
| 基金项目:天津市自然科学基金资助项目(993602911);国家自然科学基金资助项目(59975068) |
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| Wavelet filtering of electric signals in short circuit CO2 welding |
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YANG Lijun, XU Licheng, ZHANG Xiaonan, LI Junyue
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School of Material Science and Engineering, Tianjin University, Tianjin 300072, China
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| Abstract: |
| The electric signals of short circuiting transfer in CO2 welding were analysed with Fourier series, which consist of many elementary waves with different frequency, including the inherent high frequency elementary waves and interfere signals of high frequency besides low frequency elementary waves.The wavelet filtering with adjustable threshold was applied to study the signals of both general and waveform controlling short circuiting transfer, which indicates the importance of a suitable waveform data processing method to short circuiting transfer in CO2 welding. |
| Key words: waveform control short circuiting transfer CO2 welding wavelet adjustable threshold |
