基于NB-IoT的燃气流量监测系统设计

Design of NB-IoT-based gas flow monitoring system

针对传统燃气表存在测量精度低、功能单一、安全性能差等问题,搭建了一种基于NB-IoT的燃气流量监测系统。该系统硬件方面采用STM32作为主控芯片,通过设计一款热式气体流量计,实现了气体流量的准确测量,并结合多传感器对燃气环境中温湿度、燃气浓度、压强等信息进行实时监测;软件方面使用FreeRTOS操作系统进行设计。借助NB-IoT技术将监测数据上传至OneNET云平台,用户可通过App实时查看燃气使用情况。实验结果表明,该系统可实现0.016~6 m^(3)/h的气体流量测量,测量误差在±1%以内,重复性小于2%,且系统数据无线传输稳定,有效确保了燃气监测的精确性和安全性。

A gas flow monitoring system based on NB-IoT technology was developed to address the issues of low measurement accuracy,limited functionality,and poor safety performance in traditional gas meters.The hardware aspect of the system employed an STM32 microcontroller as the main control chip and incorporated a specially designed thermal gas flow meter to accurately measure gas flow.Additionally,multiple sensors were integrated to enable real-time monitoring of temperature,humidity,gas concentration,and pressure in the gas environment.The software design utilized the FreeRTOS operating system.Leveraging NB-IoT technology,the system transmitted monitoring data to the OneNET cloud platform,allowing users to monitor gas usage in real-time through a dedicated mobile application.Experimental results demonstrated that the system achieved gas flow measurement ranging from 0.016 to 6 m^(3)/h with a measurement error within±1%and a repeatability of less than 2%.Furthermore,the system's wireless data transmission remained stable,effectively ensuring the accuracy and safety of gas monitoring.