用于非接触超声洁牙的压电换能器设计  

Design of Piezoelectric Transducer for Noncontact Ultrasonic Dental Cleaning

作　　者：任滢 秦智 袁宝 李成皓 周静[1] 沈杰[1] REN Ying;QIN Zhi;YUAN Bao;LI Chenghao;ZHOU Jing;SHEN Jie(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Orange Dental Technology Co.,Ltd.,Shanghai 200030,China)

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]上海极橙医疗科技有限公司,上海200030

出　　处：《压电与声光》2024年第3期381-385,391,共6页Piezoelectrics & Acoustooptics

摘　　要：设计了一种非接触式的超声洁牙装置。通过12个超声变幅单元并联组合成牙套式阵列结构,突破了口腔有限空间内对换能器声发射能力的限制。采用声-结构耦合有限元模拟和回归分析,在300~400 kHz工作频段优选PZT-5H为压电相,优化了透声层内空心圆锥形变幅杆设计。其辐射到牙列表面的平均声功率为2.32 W,正、负相最小声压幅值分别为794.668 kPa、-800.854 kPa。声场分布分析表明,在300~400 kHz频段内扫频激励产生的混响声场可以覆盖整个牙列,实现全方位的超空化非接触式洁牙。A noncontact ultrasonic dental cleaning device is designed in this study.It addresses the limitation of a transducer’s acoustic transmitting power due to the space in the oral cavity by combining 12 ultrasonic horn units in parallel to form a braces-type array structure.Results of acoustic-structural coupling finite-element simulation and regression analysis show that the piezoelectric-phase type is PZT-5H,which features a hollow conical ultrasonic horn in the acoustic-permeable module.The average acoustic power radiated to the dental surface is 2.32 W,and the minimum positive-and negative-phase acoustic pressures are 794.668 and-800.854 kPa,respectively,between 300 and 400 kHz.The acoustic field encompassing the entire dentition can be generated by sweeping frequency cleaning in this frequency band.Finally,the device can achieve complete supercavitation and noncontact dental cleaning.

关 键 词：非接触式超声清洗 有限元模拟 牙套式超声洁牙装置 弯曲振动压电换能器 

分 类 号：TN384[电子电信—物理电子学] TB33[一般工业技术—材料科学与工程]