可编织、可穿戴的宽带聚合物超声换能器  

A weavable and wearable polymer ultrasonic transducer with a large bandwidth

作　　者：邹君逸 郭星奕 吴家琦 徐冬梅 许凯亮 陈培宁 他得安 彭慧胜 Junyi Zou;Xingyi Guo;Jiaqi Wu;Dongmei Xu;Kailiang Xu;Peining Chen;Dean Ta;Huisheng Peng(State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science,Institute of Fiber Materials and Devices,Laboratory of Advanced Materials,Fudan University,Shanghai 200438,China;Department of Biomedical Engineering,Yiwu Research Institute and Shanghai Poda Medical Technology Co.,Ltd.,Fudan University,Shanghai 200438,China)

机构地区：[1]State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science,Institute of Fiber Materials and Devices,Laboratory of Advanced Materials,Fudan University,Shanghai 200438,China [2]Department of Biomedical Engineering,Yiwu Research Institute and Shanghai Poda Medical Technology Co.,Ltd.,Fudan University,Shanghai 200438,China

出　　处：《Science China Materials》2024年第8期2653-2660,共8页中国科学（材料科学）（英文版）

基　　金：supported by the Minstry of Science and Technology(2022YFA1203001,2022YFA1203002 and 2023YFC2410900);the National Natural Science Foundation of China(T2321003,22335003,T2222005 and 22175042);Science&Technology Commission of Shanghai Municipality(21511104900,20JC1414902 and 23490713500).

摘　　要：新兴的物联网技术推动了可穿戴健康监测设备的快速发展.目前,医学超声技术在严重慢性疾病的长时间监测方面具有广阔的应用前景.然而,商用超声探头一般都是刚性的,需要手持,难以满足医疗可穿戴设备对柔性化、小型化和舒适性的要求.本文提出了一种可编织、可穿戴的聚合物超声换能器,该换能器由匹配层、背衬层和压电层组成.聚合物压电材料的带宽(93%)是压电陶瓷的7倍,并且可以承受超过10,000次的弯曲和扭曲变形.该传感器能监测颈动脉血液流速,心脏血液流速和心脏血管的血管厚度,并具有与商用探头相当的信噪比.它的宽带特性(3.68–10.08 MHz)使其能通过调整频率来监测不同的组织.可编织超声换能器可以制成纤维形式,并编织成透气织物,在不牺牲穿戴舒适性的情况下进行实时血管监测.The rise of Internet of Things technologies has promoted the rapid advancement of wearable health monitoring devices.While medical ultrasound technology holds promise for long-term monitoring to detect critical chronic diseases,current commercial ultrasound probes often lack the flexibility,miniaturization,and comfort necessary for medical wearable devices.To address this gap,we propose a weavable and wearable polymer ultrasonic transducer comprising a matching layer,a backing layer,and a piezoelectric layer.This transducer exhibits a bandwidth of 93%,which is six times that of transducers made from piezoelectric ceramics,and could withstand over 10,000 cycles of bending and twisting deformations.The transducer successfully monitors blood flow velocity and measures vessel thickness in the carotid artery and cardiac vessel,achieving a signal-to-noise ratio comparable to that of commercial probes.Its wideband property,with a bandwidth of 3.68–10.08 MHz,allows for the monitoring of various tissues through frequency adjustment.Furthermore,the weavable ultrasonic transducer in fiber form is seamlessly integrated into breathable textiles for real-time cardiovascular monitoring without compromising comfort.

关 键 词：血液流速 超声换能器 可穿戴设备 超声探头 扭曲变形 匹配层 慢性疾病 压电材料 

分 类 号：TB552[理学—物理]