基于物联网的高精度超声波气体流量监测系统设计  

Design of High Precision Ultrasonic Gas Flow Monitoring System Based on Internet of Things

作　　者：郑高原 佘世刚 ZHENG Gao-yuan;SHE Shi-gang(College of Mechanical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学机械工程学院,江苏常州213164

出　　处：《仪表技术与传感器》2021年第2期65-70,共6页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(51775410)。

摘　　要：针对工业现场超声波流量计要求较高精度,简化现场布线,对安装现场进行监控预警又要远距离传输数据的需求,设计了一种基于物联网MQTT协议和ESP8266芯片的高精度超声波气体监控系统。使用DHT22测量温湿度、MQ-4测量甲烷浓度。为提高超声波流量计的精度,使用Z式探头安装法与MAX35104高精度气体测量芯片。采用STM32F103ZET6作为主控MCU,实现对外围电路的控制及数据处理。为实现远程控制与无线传输数据,采用ESP8266芯片通过网络传输数据。实验证明,该系统实现了测量现场的布线简化、危险环境监控和远程数据传输,可以进行气体流量测量,成本较低,可靠性高。Aiming at the requirements of industrial field ultrasonic flowmeter with high precision,simplified field wiring,monitoring and warning on installation site and long-distance data transmission,a high-precision ultrasonic gas monitoring system based on Internet of Things MQTT protocol and ESP8266 chip was designed.DHT22 was used to measure temperature and humidity,and MQ-4 was used to measure methane concentration.In order to improve the accuracy of ultrasonic flowmeter,Z probe installation method and MAX35104 high precision gas measurement chip were used.STM32F103ZET6 was adopted as the master MCU to realize peripheral circuit control and data processing.In order to realize remote control and wireless data transmission,ESP8266 chip was adopted to transmit data over the network.The experimental results show that the system can realize simple wiring,dangerous environment monitoring and remote data transmission,and can carry out gas flow measurement with low cost and high reliability.

关 键 词：超声波气体流量计 DHT22 物联网 MQ-4 MAX35104 STM32F103 ESP8266 

分 类 号：TH814[机械工程—仪器科学与技术]