Propagation Direction Control of Electromagnetic Ultrasonic Guided Wave in Aluminum Plate
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摘要: 针对铝板中电磁超声导波主声束传播方向控制的问题，采用毕奥萨伐尔定律等效模型分析方法，建立了非对称斜向曲折型线圈与电磁超声导波主声束传播方向的关系，试验验证了曲折型线圈的斜向角度与电磁超声导波主声束传播方向控制方法的可行性。结果表明：斜向曲折型线圈结构电磁超声换能器产生的超声导波主声束方向垂直于线圈工作导线，通过改变线圈的斜向角度，可实现超声导波传播方向的控制。
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关键词:
- 电磁超声换能器 /
- 非对称斜向曲折型线圈 /
- 毕奥萨伐尔定律 /
- 主声束
Abstract: Aiming at the control of the propagation direction of the main acoustic beam of electromagnetic ultrasonic guided wave in the aluminum plate, the equivalent model analysis method of Biot Savart law was adapted. The relationship between the asymmetric oblique tortuous coil and the propagation direction of the main beam of the electromagnetic ultrasonic guided wave was established. The experiment verified the feasibility of the oblique angle of the zigzag coil and the control method of the propagation direction of the main beam of the electromagnetic ultrasonic guided wave. Results show that ultrasonic guided wave generated by the electromagnetic ultrasonic transducer with oblique tortuous coil structure is perpendicular to the working wire of the coil. The control of the direction of propagation can be realized by changing the oblique angle of the coil. -
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