In order to improve the efficiency of magnetic flux leakage ( MFL) testing for tank floors, the flaw location, test data description and visualization from anomalistic signals are studied. 针对储罐底板漏磁检测的实际需要,研究了根据异常数据点进行缺陷自动定位、定量描述及可视化的基本方法。
Ultrasonic Flaw Location of Angle Welded Joint with Inserted Take Over 插入式接管角接接头超声波探伤缺陷定位
It was showed that the signal to noise ratio was greatly improved, and flaw location accuracy and longitudinal resolution were heightened. 结果表明,该算法大大提高了缺陷回波信号的信噪比,且具有较高的缺陷定位精度和纵向分辨率。
Flaw location and sizing in butt welded pipes 管道对接焊缝缺陷的测量与定位
Besides, through trailing and distill for the flaw image after pretreatment, line draft join etc. processing method, can realize the quantitative analysis for the physical features such as length and the location of flaw. 此外,通过对预处理后的疵病图像采用跟踪提取,线条拟合等处理方法,可实现对疵病的位置、长度等物理特征的定量分析。
It was pointed out that the keypoint in designing the special transducer was its working frequency and crystal angle according to the coat thickness and flaw location. 根据外套壁厚和裂纹位置特点,提出了专用超声换能器的设计关键在于工作频率和晶片倾斜角。
To avoid the flaw, a location model by combing AHP/ DEA and goal programming is presented. 为了克服上述缺陷,本文提出了综合AHP/DEA和整数规划的应急服务设施选址模型。
The formulae for the ultrasonic flaw location in the parts with oblique reflection planes by secondary harmonic method 二次波探伤中反射面为斜面时的缺陷定位计算
Test results showed that noises were depressed well, signal-to-noise ratio was improved obviously, and flaw location accuracy and longitudinal resolution were improved by using the method. 结果表明,它能较好地抑制噪声,使用该法处理的信号的信噪比明显提高,并且具有较高的缺陷定位精度和纵向分辨率。
From the results obtained in experiment, it can be seen that the signal to noise ratio and the effect of signal characteristics are greatly improved, and flaw location accuracy and longitudinal resolution are advanced too. 研究结果表明:利用小波包阈值去噪,大大提高了缺陷回波信号的信噪比,改善了信号特征信息的质量,并且具有较高的缺陷定位精度和纵向分辨率。
In this paper, we mainly used experiments and finite element method ( FEM) to research the laser ultrasonic flaw detection and provided some methods to investigate the location, size and some other information of the flaw. 本文从实验及有限元方法两方面展开对激光超声缺陷检测的研究,主要提出一些判断缺陷位置、尺寸等信息的方法。
Research on modern digital signal processing and flaw detection mode of non-destructive weld detection not only improves accuracy of detection, but also makes detection results such as size, location and property of weld flaws quantitatively. 现代数字信号处理和模式识别相结合的技术推进了焊接无损检测技术,不仅提高了检测的准确性,并可得出检测的量化结果,如焊接缺陷的大小、位置及性质。