基于低功耗蓝牙的膀胱尿液容量监测系统

Bladder urine volume monitoring system based on Bluetooth with low⁃power consumption

针对现有膀胱尿液容量或压力监测系统存在结构复杂、损伤膀胱组织、电池供电寿命短、无线供电功耗大和易受空间位置影响等问题,设计一种基于低功耗蓝牙的膀胱尿液容量监测系统。该系统由体内监测装置和体外接收装置构成,体内监测装置由小型锂电池供电,通过低功耗蓝牙采集膀胱作用于柔性压力传感器的压力信号并发送至体外;体外接收装置通过磁耦合谐振式无线电能传输向体内电池充电,接收体内压力传感器信号,并经计算模型将压力传感器信号转换为膀胱尿液容量进行显示和储存。模拟实验结果表明,该系统可实现膀胱尿液容量的监测,测量精度满足应用要求,体积小且功耗低、运行时间长、能及时预警,可为新型的膀胱尿液容量监测装置的设计提供技术指导。

In order to overcome the deficiencies of the existing implantable bladder urine volume or pressure monitoring system,such as complex structure,damage of bladder tissue,short battery life,high power consumption of wireless power supply and susceptibility to spatial position,an implantable bladder urine volume monitoring system based on low energy Bluetooth is designed.The system is composed of a monitoring device inside the body and a receiving device outside the body.The former,powered by a small lithium battery,is used to collect the pressure signals(that the bladder acts on the flexible pressure sensor)by low energy Bluetooth and send them outside the body,while the later is used to charge the battery inside the body by the magnetic coupling resonant wireless power transfer,receive the signals from internal pressure sensor and convert them into bladder urine volume by the computational model for display and storage.The simulation experiment results show that the system can realize the monitoring of bladder urine volume.Its measuring accuracy can meet the application requirements.In addition,it has the advantages of small volume,low power consumption,long running time and timely warning.Therefore,it can provide technical guidance for the design of new bladder urine volume monitoring device.