| 带斜楔相控声束偏转聚焦延时特性研究 |
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| 引用本文： | 姜学平,王鹏,韩庆邦,田国良.带斜楔相控声束偏转聚焦延时特性研究[J].应用声学,2016,35(3):219-224. |
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| 作者姓名： | 姜学平 王鹏 韩庆邦 田国良 |
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| 作者单位： | 河海大学物联网工程学院,河海大学物联网工程学院,河海大学物联网工程学院,葫芦岛特种设备监督检验所 |
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| 基金项目： | 国家自然科学基金项目 (11274091, 11574072), 河海大学中央高校基金项目 (2015B04714, 2011B11014) |
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| 摘 要： | 带斜楔的相控阵超声检测广泛应用于低碳钢薄壁工件焊缝的检测,研究带斜楔的相控阵超声偏转聚焦检测延时法则和对应的声场将使检测可靠性进一步提高。本文利用费马原理探究了相控阵超声探头辐射声波至楔块中,在楔块-工件平面界面发生模式转换入射到工件中的横波聚焦时各阵元延时的计算方法,数值求解指定焦点时各阵元的延时,并利用计算得到的延时进行声场仿真和实验测量,发现声波能很好的聚焦在目标点,仿真和实验结果吻合。
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| 关 键 词： | 相控阵超声检测，延时法则，Fermat原理 |
| 收稿时间： | 2015/9/10 0:00:00 |
| 修稿时间： | 2016/4/27 0:00:00 |
Calculations of time delay-laws in phased array focusing ultrasound testing with inclined wedges |
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| Jiang Xueping,Wang Peng,Han Qingbang and Tian Guoliang.Calculations of time delay-laws in phased array focusing ultrasound testing with inclined wedges[J].Applied Acoustics,2016,35(3):219-224. |
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| Authors: | Jiang Xueping Wang Peng Han Qingbang and Tian Guoliang |
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| Abstract: | Phased array ultrasonic testing with inclined wedges is widely used in low carbon steel thin-wall workpieces welds inspection. Investigation of delay laws for phased array ultrasonic focusing deflection testing can improve the evaluation reliability even more. In the ultrasonic testing, sound wave radiated from a phased array probe passes through the wedge-specimen plane interface and the mode conversion shear wave is focused in the specimen. Employing Fermat principle, calculations of each element delay time is deduced and a numerical solution for a focal point is got. Finally, simulation and experimental measurement of focusing acoustic field was carried out. The result shows that the beam can focus on the target point, and the simulation and experimental results agrees well. |
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| Keywords: | Phased array ultrasonic testing Time delay laws Fermat principle |
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