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超声无损检测
“超声无损检测”译为未确定词的双语例句
Research and Development of Ultrosonic System for Non-destructive Testing and Experimental Teaching 超声无损检测及实验教学系统的研究与开发 短句来源 The Lamb wave technique is used in the detection of internal defects in plates. 对于板材的内部缺陷,常用兰姆波作超声无损检测。 短句来源 An ultrasonic non-distructive tesing system integrated with computer has been developed. 开发了一套超声无损检测计算机集成系统。 短句来源 相似匹配句对
Research and Development of Ultrosonic System for Non-destructive Testing and Experimental Teaching 超声无损检测及实验教学系统的研究与开发 短句来源 A new method for ultrasonic NDT and NDE 超声无损检测和无损评价的一种新方法研究 短句来源 Ultrasonics for Testing 检测超声 短句来源 Stimulated Brillouin Scattering and Ultrasonic Cavitation 受激布里渊散射和超声空化 短句来源 MEASUREMENTS OF SENSITIVITY OF TRANSDUCER IN THE FIELD OF NOT BY THE RECIPROCITY TECHNIQUE 无损检测用换能器灵敏度的测量 短句来源 
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Application of Hilbert-Huang signal processing to ultrasonic non-destructive testing of oil pipelines
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A Blind Source Separation Technique for Extracting Sinusoidal Interferences in Ultrasonic Non-Destructive Testing
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The Lamb wave technique is used in the detection of internal defects in plates. The reflection of the Lamb wave at the free edge of the plate is shown to be more complicated. The reflected waves are usually composed of infinite number of modes of the Lamb waves even in the case of one mode of Lamb wave incidence. The analysis of the reflection problem is complicated, as the orthogonal relation of the eigen-modes of the Lamb wave concerns both the components of the stresses and displacements. The principle o... 对于板材的内部缺陷,常用兰姆波作超声无损检测。兰姆波在板材自由端面上的反射呈现复杂现象,即使在纯模入射条件下,通常也要产生无数个其它模式的反射兰姆渡。由于兰姆波本征模式正交关系同时涉及位移和应力,使其反射问题的分析较复杂,我们采用了一种新方法,应用最小二乘原理,将兰姆波本征模式作为试验函数,实现了一种较简单的分析方法。在一般情形下,利用8位微处理机就可取得满意的结果。应用该方法,给出了兰姆波在自由端面上反射时各模式的反射系数,阐明了纯模反射条件,并发现了关于模式转换的一些有趣的新现象。 文摘来源 Ultrasonic nondestructive testing of coarse grained materials is limited by the signal-to-noise ratio (SNR) because of backscattering noise. This type of noise is coherent and its effects cannot be reduced by time averaging techniques. Split spectrum signal processing (SSP) has proven to be effective in improving the SNR of backscattered signals. Many authors have developed frequency splitting theory as the postprocessor. This paper introduces a cross-correlation weighted method as the preprocessor for ultr... 粗晶材料的超声无损检测受背散射的影响，使得其信噪比很低，且这里的噪声是与发射超声波相干的噪声，不能用简单的时间平均来消除。分离谱技术已被证明是一种抑制背散射信号、提高信噪比的良好方法，许多人为此发展了各种理论作为分离谱的后处理算法。本文介绍了一种增强超声回波信号的相关加权前处理算法。这里，取自粗晶材料标准缺陷的窄脉冲超声回波被定义为标准子波，利用子波与超声检测信号的互相关作为权系数对检测信号进行加权，此技术与分离谱处理结合起来能使提高信噪比的性能更优。实验结果显示了本文所述方法可改善诸如奥氏体不锈钢一类粗晶材料超声检测的信噪比 文摘来源 An ultrasonic non-distructive tesing system integrated with computer has been developed. It has abilities in tesing, control, digital signal processing and pattern recognition. High scaning precision, powerful, function of signal acquisition and several output figures can be gained. The system will find uses in the non-destructive testing and flawes evaluation of materials. 开发了一套超声无损检测计算机集成系统。该系统集测试、控制、数据采集与模式识别于一体 ,系统扫查精度高、数字信号采集与处理功能强、有多种图形图像输出模式 ,能够用于多种材料结构的无损探伤和缺陷评价 ,满足工业产品的质量控制、新材料研发及无损检测实验教学工作的需要。 文摘来源 << 更多相关文摘 
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