地下位移三维测量系统低功耗设计

Design of underground three⁃dimensional displacement measurement system with low power consumption

为了解决地下位移三维监测系统供电成本高的问题,文中从系统级和体系结构级等角度对地下位移三维测量系统进行低功耗设计,延长该系统的工作时间。为最大程度地降低该系统的功耗,分别从器件的选择、电路的硬件改进和多电源域等方面采取硬件低功耗措施。通过动态电源管理的方式对各模块进行分时分区供电的软件低功耗优化设计,实现该检测系统的低功耗设计,减少电池电量的消耗。实验结果表明,所设计系统的每个传感单元休眠时电流均降低至80μA,工作一个周期消耗的电量仅为0.00512 mA·h,相对于原系统减少20.95%,在无外部充电的情况下可连续工作约113天,满足在极端条件下长时间工作的需求。

In order to solve the disadvantage of high power supply cost of underground three-dimensional displacement monitoring system,the underground three-dimensional displacement measuring system with low power consumption is designed from the perspective of system level and architecture level,so as to prolong the working time of the system.In order to reduce the power consumption of the system to the greatest extent,the hardware low power measures such as device selection,circuit hardware improvement and multi-power domain are adopted respectively,and the software low power optimization design of timesharing and partition power supply is conducted for each module to realize the low-power consumption of the detection system and reduce the battery power consumption.The experimental results show that the current of each sensing unit in the designed system can decrease to 80μA during sleep,and the power consumption during one cycle of operation is only 0.00512 mA·h,which is 20.95%less than the original system.It can work continuously for about 113 days without external charging,meeting the demand for long-term operation under extreme conditions.