植入式无线遥测系统设计

发布时间：2018-02-20 21:02

本文关键词： 植入式系统无线遥测低功耗 PPM调制　出处：《浙江大学》2012年硕士论文　论文类型：学位论文

【摘要】：植入式无线遥测系统是一种埋置在动物体内的电子设备,用来测量生命体内的生理、生化参数的长期变化与诊断、治疗某些疾病。植入式无线遥测系统可获得被测动物在无限制状态下的生理数据,适合长期测量。植入子的体积、重量、功耗是植入式系统的关键指标,数字无线通信方案功耗过大,FM/AM等模拟通信方案连续载波发射功耗较大,目前该领域尚无现成的电子电路解决方案。论文设计了一套用于大鼠生理参数监测的植入式无线遥测系统。采用多通道脉冲位置调制原理(PPM),在功耗和体积限制下实现了多路信号实时、连续调制,通过L-C共振天线设计,提高了发射能量。论文主要研究工作如下： 1对设计方案进行电路仿真分析、调试优化,得到了整套电路最佳参数,实现了两通道测量系统(一路心电,一路温度)电流消耗仅34uA。 2设计了植入电路的各种分割(方形、圆形)以及封装形式(圆柱形、长方体),实现了两通道系统(一路心电,一路温度)体积仅为1.8cm3。 3设计了整套接收电路以及PC显示软件,对整套系统进行联合调试,得到系统性能参数和技术指标。通过8只雄性SD大鼠体内外实验,表明系统可以连续测量心电、体温等信号,且在高频段比国外同类产品效果更优。采用两节纽扣电池RENATA395供电,系统持续工作时间达78天,满足使用需求。
[Abstract]:The implanted wireless telemetry system is an electronic device embedded in the body of an animal to measure the long-term changes and diagnoses of physiological and biochemical parameters in the body of life. To treat certain diseases. Implantable wireless telemetry system can obtain physiological data of tested animals in unrestricted state, which is suitable for long-term measurement. The volume, weight and power consumption of implants are the key indexes of implantable systems. The power consumption of analog communication schemes such as FM / AM is high, and there is no existing electronic circuit solution in this field. In this paper, an implantable wireless telemetry system for monitoring physiological parameters of rats is designed. The principle of multi-channel pulse position modulation (PPMN) is used to realize real-time and continuous modulation of multi-channel signals under the limitation of power consumption and volume, and the design of LC-resonant antenna is used. The emission energy is increased. The main research work of this thesis is as follows:. The results are as follows: (1) the circuit simulation analysis, debugging and optimization of the design scheme are carried out, and the optimal parameters of the whole circuit are obtained. The current consumption of the two-channel measuring system (one ECG, one temperature) is only 34uA. (2) various splits (square, round) and encapsulation (cylindrical, cuboid) of the implanted circuit are designed, and the volume of the two-channel system (one ECG, one temperature) is only 1.8 cm ~ (3). 3. A complete set of receiving circuit and PC display software are designed, and the system performance parameters and technical specifications are obtained by joint debugging of the whole system. In vitro and in vivo experiments in 8 male SD rats showed that the system could continuously measure ECG, body temperature and other signals, and had a better effect in high frequency range than that of similar products in foreign countries. Two button batteries were used to supply the power supply, and the system lasted for 78 days. Meet the needs of use.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R318.6

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