中国物理B ›› 2025, Vol. 34 ›› Issue (4): 40702-040702.doi: 10.1088/1674-1056/adb38c
Generation of acoustical Bessel-like collimated beams using ring-excited flat plate structure transducers
Ming-Liang Han(韩明亮)1, Ruo-Yu Tang(唐若昱)2, Ning Ma(马宁)1, Guang-Bin Zhang(张光斌)1,†, and Xiao-Feng Zhang(张小凤)1
- 1 Shaanxi Key Laboratory of Ultrasonics, College of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China;
2 College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
Generation of acoustical Bessel-like collimated beams using ring-excited flat plate structure transducers
Ming-Liang Han(韩明亮)1, Ruo-Yu Tang(唐若昱)2, Ning Ma(马宁)1, Guang-Bin Zhang(张光斌)1,†, and Xiao-Feng Zhang(张小凤)1
- 1 Shaanxi Key Laboratory of Ultrasonics, College of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China;
2 College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
摘要： This paper proposes a method to generate Bessel-like collimated beams with suppressed side lobes using the flexural vibration modes of a fixed boundary circular plate, which is excited by a longitudinally vibrating transducer in a ring excitation manner. The factors affecting the generation of Bessel-like collimated beams are investigated by theoretical analysis, numerical simulation and experimental methods. The results indicate that Bessel-like wave can be generated by a thin circular plate with fixed boundaries. The third-order mode of the circular plate can be modified to generate a collimated beam with suppressing side lobes when it is excited in a ring excitation manner and the excitation position lies between the first two nodal circles of the plate. As the excitation radius increases, the main lobe width of the resulting Bessel-like collimated beam decreases, the extent of the focusing region increases, and the amplitude of the side lobes initially increases and then decreases. Based on the simulation results, a prototype Bessel-like collimated beam generation system is made and measured experimentally. The experimental results are in good agreement with the numerical results. The Bessel-like collimated beam can be generated by the proposed system, which has potential application in the fields of long-range detection, imaging of highly attenuated materials, and airflow acceleration.
中图分类号: (Transducers)
- 07.07.Mp