透射式低频超声胸腔成像换能器研究  

Study on transmission transducer for low frequency ultrasonic chest imaging

作　　者：许莹 颜华[1] 周英钢[1] XU Ying;YAN Hua;ZHOU Yinggang(School of Information Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学信息科学与工程学院,辽宁沈阳110870

出　　处：《传感器与微系统》2023年第9期18-20,共3页Transducer and Microsystem Technologies

摘　　要：透射式超声胸腔成像是近年出现的新技术,换能器是关键技术之一。但常规换能器的频率或尺寸不适合胸腔中透射超声的接收。利用多物理场有限元仿真平台,进行了压电超声换能器结构参数的研究。用胸腔模型验证了换能器的性能。研究结果表明:所设计的30 kHz小尺寸超声换能器在肺充气、失气状态下的输出电压值较大且有明显差异,可用于基于速度场和密度场的胸腔层析成像。Transmission ultrasonic technology on chest imaging appears in recent years,and transducer is one of the key problems in this technology.However,the frequency or size of conventional transducer is not suitable for the reception of transmitted ultrasound in the chest.The structural parameters of piezoelectric ultrasonic transducer are studied by using multiphysics field finite element simulation platform.The performance of the transducer is verified by the chest model.The results show that the output voltage of the designed 30 kHz small-size ultrasonic transducer has obvious difference between the condition of inflated lung and deflated lung,which can be used for chest tomography based on velocity field and density field.

关 键 词：胸腔成像 低频超声 压电换能器 有限元仿真 

分 类 号：TB552[理学—物理]