植入式无源无线声表面波温度传感检测系统  

Implantable passive and wireless telemetering system based on SAW temperature sensor

作　　者：叶学松[1] 王学俊[1] 梁波[1] 王琼[1] 何利松[2] 贝伟斌[2] 

机构地区：[1]浙江大学生物医学工程与仪器科学学院,生物医学工程教育部重点实验室,生物传感器国家专业实验室,浙江杭州310027 [2]中电科技德清华莹电子有限公司,浙江德清313200

出　　处：《浙江大学学报（工学版）》2011年第11期2068-2072,共5页Journal of Zhejiang University：Engineering Science

基　　金：浙江省科技厅重大科技专项资助项目(2008C11107-2)

摘　　要：为解决生物体内温度信号的长期实时无线遥测问题,设计一种新型的基于声表面波传感技术的植入式无源无线温度检测装置,并构建基于NI射频通讯设备的无线遥测虚拟仪器系统.该植入式电子装置将433 MHz声表面波温度传感器与简易谐振电路集成,利用射频通讯虚拟仪器平台,在外部4 MHz中频电磁能量的供应下,实现生物体内温度的高精度实时监测.实验表明:在30～45℃测量范围内,该检测系统具有8.542 kHz/℃的温度灵敏度和小于±0.1℃的测量精度;系统在20 dBm的发射功率下检测距离可达到1 m.To achieve long-term and real-time wireless in-vivo detection of body temperature,a novel passive and wireless telemetering system based on SAW temperature sensor was developed.A radio communication platform based on NI virtual instrument for wireless telemetry was built to test the performance of the sensor.Through this virtual instrument platform,the implantable electronic device,which was composed of 433 MHz SAW temperature sensor and simple resonant circuit,realized the in-vivo temperature monitoring under external 4 MHz electromagnetic energy supply.Results show that the temperature sensitivity of this system is 8.542 kHz/℃ at 30～45 ℃,with the measurement accuracy of ±0.1 ℃.Furthermore,animal experiment demonstrates that this system has accomplished the measurement of body temperature successfully,and the measuring distance reaches up to 1 m with 20 dBm transmitting power supply.

关 键 词：植入式电子装置 声表面波温度传感器 无源无线遥测 虚拟仪器 

分 类 号：TH811[机械工程—仪器科学与技术]