On the basis of digital signal process and nondestructive testing, the effect of welding process on the frequency spectrum of the current signal in AC spot welding is analyzed.
在数字信号处理及无损检测的理论基础上，分析了焊接过程对电流信号频谱的影响。
The spot testing and analysis by synthesis is adopted to analyze and process the test signal.
采用现场测试与综合分析法，对测试信号进行了分析和处理。
The synthetic testing system for power transformers is introduced, in which the virtual in stru mentation technology, component software technology and digital signal process technology are used.
介绍了采用虚拟仪器技术、组件化软件技术和数字信号处理技术的电力变压器综合检测系统。
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