基于相位聚焦的驻波声场悬浮与运输方法研究  

Research on Suspension and Transportation of Standing Wave Sound Field Based on Phase Focusing

作　　者：杨永 李明浩 吴阶平 杨钊 黄帅[1,2] Yang Yong;Li Minghao;Wu Jieping;Yang Zhao;Huang Shuai(College of Mechanical and Vehicle Engineering,Hunan University,Changsha410082,China;Innovation Institute of Industrial Design and Machine Intelligence Quanzhou Hunan University,Quanzhou362006,China)

机构地区：[1]湖南大学机械与运载工程学院,长沙410082 [2]泉州湖南大学工业设计与机器智能创新研究院,泉州362006

出　　处：《动力学与控制学报》2023年第7期51-58,共8页Journal of Dynamics and Control

基　　金：国家自然科学基金(52275420);湖南省自然科学基金(2022JJ30136);福建省自然科学基金资助项目(2021J05108)。

摘　　要：高频驻波声场中声波入射波与反射波非线性叠加作用下会产生声辐射力,从而实现微小物体的悬浮.使用幅值调制或频率调制改变悬浮位置存在空间上限制,且运输平稳性较差.在换能器阵列形成声场中,使用相位调制可以实现定点聚焦与物体平稳运输.基于超声驻波悬浮原理,详细分析了单驻波、平面驻波、空间驻波声场声压、相位分布情况,并基于聚焦原理使用相位调制的方法实现对声场的定点聚焦、聚苯乙烯小球悬浮与运输.结果表明:单驻波声场可通过双向相位调制方法实现小球稳定运输;在横向相位差为π的情况下使用PLL多时钟信号可实现多方向、不同速度的同时运输;空间阵列驻波声场通过定点聚焦声压提高了83%,且通过连续改变焦点位置实现了小球直线运输.In the high frequency standing wave field,the nonlinear superposition of the incident wave and the reflected wave will produce the acoustic radiation force,which can realize the suspension of small objects.Using amplitude modulation or frequency modulation to change the suspension position has space limitation,and the transport stability is poor.In the sound field formed by transducer array,the proposed phase modulation can realize fixed-point focusing and smooth object transportation.Based on the principle of ultrasonic standing wave suspension,the sound pressure and phase distribution of single standing wave,plane standing wave and space standing wave sound field has been analysed in detail.Based on the principle of focusing,phase modulation was used to realize the fixed point focusing of sound field,polystyrene ball suspension and transportation.The results show that the polystyrene foam ball can be transported stably by bidirectional phase modulation in the single standing wave acoustic field.PLL multi-clock signal can be used to realize multi-direction and different speed simultaneous transportation when the lateral phase difference isπ.The sound pressure of the standing wave field in the space array was increased by 83%by fixed-point focusing,and the linear transport of the ball was realized by changing the focal position continuously.

关 键 词：驻波声场 声场聚焦 声波干涉 相位调制 相位差 

分 类 号：TB559[理学—物理]