Suzhou Electric Appliance Research Institute
期刊號： CN32-1800/TM| ISSN1007-3175

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一種基于STM32微控制器的低功耗LoRa感知系統(tǒng)設(shè)計

來源：電工電氣發(fā)布時間：2022-06-21 13:21 瀏覽次數(shù)：529

一種基于STM32微控制器的低功耗LoRa感知系統(tǒng)設(shè)計

方鄉(xiāng)，陳仲生，李文豪
(湖南工業(yè)大學(xué) 電氣與信息工程學(xué)院，湖南 株洲 412007)
 
    摘 要：無線傳感器節(jié)點由于部署環(huán)境而受到嚴(yán)峻的供電限制，這促使其通過低功耗技術(shù)來延長使用年限。以溫濕度、振動為監(jiān)測對象，提出了一種能量管理與動態(tài)電壓調(diào)節(jié)方法，從軟件與硬件上同時降低電流的損耗，系統(tǒng)微控制器采用低功耗芯片 STM32L475VET6 及低功耗局域網(wǎng) LoRa 技術(shù)實現(xiàn)遠(yuǎn)距離通信，主控制器多種模式喚醒工作，系統(tǒng)長周期保持睡眠模式，通過實驗測量監(jiān)測節(jié)點在空閑待機(jī)模式下僅消耗 21.85 μA。解決了不穩(wěn)定監(jiān)測與長周期監(jiān)測節(jié)點的問題，對于物聯(lián)網(wǎng)監(jiān)測具有實際的應(yīng)用價值。
    關(guān)鍵詞： 低功耗；LoRa 技術(shù)；MCU ；傳感器
    中圖分類號：TN92 ；TP212     文獻(xiàn)標(biāo)識碼：A     文章編號：1007-3175(2022)06-0014-05
 
Design of a Low-Power LoRa Sensing System Based on STM32 MCU
 
FANG Xiang, CHEN Zhong-sheng, LI Wen-hao
（College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China）
 
    Abstract: There is a power supply limitation of wireless sensor nodes due to the deployment environment, which means it has to extend the service life by using low-power technology. This paper monitored the temperature, humidity, and vibration and proposed a method to help reduce the current loss from both hardware and software aspects. The system microcontroller used the low-power chip of STM32L475VET6 and the LoRa technology of the low-power LAN network to realize long-distance communication. The master controller had various wake-up modes, and the system kept sleep mode for a long period. The experiment result shows the microcontroller of the node system consumed 21.85 μA in standby mode. It solves the problem of instability monitoring and long-period monitoring nodes and has practical application value for the Internet of Things monitoring.
    Key words: low-power; LoRa technology; MCU; sensor
 
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