胶囊内窥镜磁跟踪系统体内装置的能量管理

摘要

In order to ensure the energy supply of an in-vivo device of the magnetic tracking system for capsule endoscopy,a kind of low power consumption and high efficiency intelligent power management module was proposed.The management module includes the main controller,boost circuit,non-contact switches,router,and negative charge pump power supply.The boost circuit is gated intelligently to the main controller along with the button battery power.The circuit will turn "off" when the battery voltage is greater than 3.3 V,and it will turn"on" while the battery voltage is less than or equal to 3.3 V,which can save the energy of boost chip and resist the early loss.In addition,the master controller controls the power router according to the working state of the device in the body and the need to gate the subsequent circuit.The experiments prove that the use of the energy management module can extend the working hours of the button battery,minimize the energy loss,and meet the time requirement of the magnetic tracking system for capsule endoscopy to complete the entire digestive tracking examination.%为了解决磁跟踪系统体内装置的能量供应问题,研究了一种低功耗、高效、智能化的能量管理方法.主要包括主控制器、升压电路、非接触式开关、电源路由器和负电荷泵.随着纽扣电池电量的消耗,升压电路由主控制器智能化选通,当电池电压大于3.3V时关断,小于或等于3.3V时开启,由此减小了升压芯片在前期的能量损耗.另外,主控制器进一步控制电源路由器,根据体内装置的工作状态,按照需要选通后级电路.经实验验证,能量管理模块可延长纽扣电池的工作时间,最大程度地降低了无效能量损耗,满足磁跟踪系统完成消化道检查所需的时间要求.