论文部分内容阅读
用中心频率为 1 5 MHz的超声水浸聚焦法对 45钢试样进行检测 ,对检测波形用不同的闸门宽度及闸门截取位置采样后进行 FFT及 IFFT,发现了不同闸门位置及闸门宽度对 FFT及 IFFT分析结果的影响规律。
45 steel samples were detected by ultrasonic water immersion focusing method with a center frequency of 1 5 MHz. FFT and IFFT were performed on sampling waveforms with different gate widths and gate interception locations. Different gate positions and gate widths were found for FFT And IFFT analysis of the impact of the law.