摘要
为解决现今指纹锁的高性能和低功耗之间的矛盾,提出了一种基于双核架构的嵌入式系统,采用TI公司AM437x高性能处理器移植识别算法;具有超低功耗的AVR单片机MEGA8微控制器作为主控芯片,以控制非接触启动、红外灯、电机驱动等外围设备,保证系统具有较低的待机功耗.通过设置主控芯片的超低功耗睡眠模式,使得系统大部分时间处于低功耗状态,利用非接触式启动模块控制高耗能识别模块仅在需要的时候上电启动,从而大大降低系统的功耗.综合测试表明,系统休眠时MCU静态工作电流低至1.51μA,唤醒时电流优化至3.3mA,8节干电池使用寿命为638d.相比现有设计方法,兼具更低的功耗和更高的性能.
This paper presented an embedded system based on dual-core architecture to solve the contradiction between high performance and low power consumption of today fingerprint lock.TI＇s AM437 x high-performance processor was used to transplant identification algorithm,with AVR microcontroller MEGA8 microcontroller of ultra-low power as a master chip to control non-contact start,infrared light,motor drive and other peripherals to ensure that the system has a lower standby power consumption.By setting the ultra-low power sleep mode of the master chip,the system is in a low power state for most of the time,and the non-contact start-up module controls the high power consumption identification module to power up only when it is needed,thus greatly reducing the power consumption.Comprehensive test shows that the static operating current is as low as 1.51μA when the system is in sleep mode,while the wake-up current is optimized to 3.3 mA.The maximum system life of six dry cells is 638 days.Compared with the existing design methods,the system has both lower power consumption and higher performance.
作者
王炼红
陈颖
WANG Lianhong;CHEN Ying(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第8期119-125,共7页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51674113)
中央高校基本科研业务费专项资金资助项目(1053214004)
湖南省自然科学基金资助项目(14JJ4026)
湖南省研究生创新项目(CX2017B112)~~
关键词
超低功耗
静态电流
电源管理
智能锁
ultra-low power consumption
static current
power management
intelligent lock
作者简介
王炼红（1971-），女，湖南长沙人，湖南大学副教授通讯联系人，E—mail：wlh-01@163．com
