In order to solve the problem that traditional positioning system can't work for a long time in off-line state due to high power loss,a positioning system based on hardware low power consumption and software"normal work-sleep work"dual mode cycle was designed.In the hardware part,the system used low-power single-chip microcomputer STM32L431 to control the GPS positioning module CNS35 and Beidou short message module TM0558,and collected the power supply circuit in real time.In the software part,the"sleep work"mode was added to realize the cyclic switch with the"normal work"mode.The results show that the low power positioning system can realize the positioning error less than 2.5 m,communication success rate≥85%,dual SIM card switching and other basic functions.In addition,under the premise of a single cycle of 4 min,the working mode of"nor-mal operation 2 min-sleep operation 2 min"can reduce the energy loss to 64.7%of the working mode of"normal operation 4 min",and prolong the time of endurance by 11.16 h.
关键词
定位系统/GPS定位/北斗短报文通信/双SIM卡切换/低功耗
Key words
positioning system/GPS positioning/Beidou short message communication/dual SIM card switching/low power con-sumption
维普
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