结果表明：该方法提取的缺陷回波信号特征值，其可分性测度均值达91.7%，从而证明该方法对超声检测缺陷回波信号的特征提取是相当有效的。
The average value of separability measure is as high as 91.7%, which indicates that this method is quite effective in the feature extraction of ultrasonic flaw echoes.
本文以无缺陷时的表面回波为参考信号，用信号处理方法，识别表面缺陷回波，从而实现对表面缺陷的检测。文中给出了该方法的原理及实验结果。
Detection of surface-breaking cracks has been realized by signal processing method using the reference signal from a surface without flaws. The principle and experimental results are given.
提出了基于高阶谱的减噪方法，能有效提高回波信号的信噪比，减弱检测噪声对于缺陷散射特征的影响，从而突出缺陷特征信息。
A method for reducing noise based on high-order spectra was presented by which the signal-to-noise ratio (SNR) could be improved significantly and the flaw characteristic information could stand out.
分析了检测信号的特征，并采用截止频率法成功地提取了微弱的缺陷回波信号。
The characteristics of the test signals were analyzed and weak defect echo signals were successfully extracted by cut-off frequency technique.
经过对32个实际焊接缺陷超声回波信号的分类识别，平面型缺陷的正确分类率为86%，体积型缺陷的正确分类率为78%；
The investigation of 32 natural weld defects show that 86% of the plane defects and 78% of the volume defects can be correctly classified.
超声探伤中，由于声场特性、件几何形状的影响，所产生的各种回波信号常常被误判为缺陷信号。
It is often misjudged the flaw echo in ultrasonic examination that the echo signals produced by sound field property and geometrical shape of the component examined according to sound field theory.
通过与平底孔试块实际缺陷回波信号的对比，验证了脉冲超声波有限差分法模拟计算的有效性和正确性。
Validity and feasibility of the finite difference time domain method is demonstrated by the echo-wave signal of a flat bottom hole block.
采用计算机化超声信号分析系统，对奥氏体不锈钢粗晶材料缺陷的超声回波信号进行采集和加工。
The ultrasonic defect echo of a austenite stainless steel with coarse grainswas acqiuired and processed using a developed computerized ultrasonic signal analysissystem.
针对焊接缺陷超声检测中信号处理的特征提取问题，应用高阶谱方法对三类压力容器焊接缺陷的超声回波信号进行了分析。
The ultrasonic echoes of welding flaws for three types of pressure vessel are analyzed for feature extraction of signal processing using higher-order spectrum method.
对此本文提出了利用缺陷的回波信息调整后续驱动器激励信号强度，从而达到缺陷处等强度效果的可控强度激发技术。
The technology which can control the transducer's driving strength according to the message of Echo is proposed in this paper.
对此本文提出了利用缺陷的回波信息调整后续驱动器激励信号强度，从而达到缺陷处等强度效果的可控强度激发技术。
The technology which can control the transducer's driving strength according to the message of Echo is proposed in this paper.
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