| Theoretical and Experimental Investigation of Ultrasonic Focusing with Annular Phased Array |
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| 引用本文： | 张碧星 汪承灏 赖溥祥. Theoretical and Experimental Investigation of Ultrasonic Focusing with Annular Phased Array[J]. 中国物理快报, 2006, 23(4): 875-878 |
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| 作者姓名： | 张碧星 汪承灏 赖溥祥 |
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| 作者单位： | Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10134020. |
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| 摘 要： | The focused acoustic field generated by an annular array interface are investigated theoretically and experimentally. transducer and its reflection field on a solid-liquid Theoretically, the concise analytic expressions about the radiation and reflection acoustic fields of the annular phased array are obtained by the ray approach method （saddle-point method）. In experiment, an annular transducer with 8 equal-area elements is designed and fabricated, and a series of experiments about the radiation acoustic field and its reflection on the liquid-solid interface are carried out. The experimental characteristics of the transducer are in good agreement with the numerical ones. It shows the correctness of the theoretical result and the feasibility of dynamic focusing of the experiment system. With the maximum amplitude and its emergence time of the reflection wave, we can acquire the information and the imaging of the reflection interface by the annular phased array dynamic focusing.
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| 关 键 词： | 理论研究 实验研究 超声聚焦 环形相阵 |
| 收稿时间： | 2005-11-29 |
| 修稿时间： | 2005-11-29 |
Theoretical and Experimental Investigation of Ultrasonic Focusing with Annular Phased Array |
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| ZHANG Bi-Xing, WANG Cheng-Hao, LAI Pu-Xiang. Theoretical and Experimental Investigation of Ultrasonic Focusing with Annular Phased Array[J]. Chinese Physics Letters, 2006, 23(4): 875-878 |
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| Authors: | ZHANG Bi-Xing WANG Cheng-Hao LAI Pu-Xiang |
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