基于WiFi的室温氢气检测系统的设计与研究

Design and Research of Room Temperature Hydrogen Detection System Based on WiFi

摘要:

为了提高氢能源及相关领域中对氢气泄漏的在线监控水平，采用基于MoO3纳米线的室温高性能半导体氢敏元件作为传感探头，以基于Cortex-M3内核的32位低功耗微控制器STM32F103VCT6为主控芯片，采用WiFi终端为客户端，利用路由器组网并以上位机做服务器，通过AT指令和TCP/IP网络传输协议等技术，结合Labview软件平台开发可视化控制和测量结果显示界面，组建了一套包含数据采集、泄漏报警、氢气浓度显示等多功能的氢气泄漏无线监测系统。该系统可通过采集环境中的温、湿度信号对传感探头检测结果进行校正，从而实现大气条件下对待测环境中氢气含量的准确监测，具有低成本、低功耗、响应速度快、监控距离远、组网简单等优点，其无线传感模式可解决产氢、用氢领域传感系统布线困难的问题，还可根据实际需要改变传感器节点的数量和客户端用户界面，具有较强的扩展性。

Abstract:

In order to improve the online monitoring technique of hydrogen leakage in hydrogen energy and related areas, the high-performance room-temperature hydrogen sensors based on MoO3 nanowires were employed as sensor probes for building the online hydrogen leakage monitoring systems. The system was consisted of a master chip based on the Cortex-M3 core 32-bit low-power microcontrollers STM32F103VCT6, the WiFi terminals as the clients and the router network with an above machine as the server. Through the AT command and TCP / IP network transmission protocol technology, as well as the Labview software platform, the visual control and measurement results display interface were developed. The system was set up to a multi-functional system together with the data acquisition, leakage alarm and hydrogen concentration display. It can correct the detection result of the sensor probe by collecting the temperature and humidity signals in the environment, so as to realize the accurate monitoring of the hydrogen content in the environment under the atmospheric condition. With low cost, low power consumption, fast response, monitoring distance, simple network and so on, its wireless sensor mode can solve the problem of Wiring difficulty in hydrogen production and related areas. One can also change the number of sensor nodes and client user interface according to the actual needs. The system also possesses high extensibility.