基于光谱技术多气体检测系统的设计

为了实时检测多种气体的浓度,以红外光谱吸收法和电化学检测为测量原理,设计了以STM32F103为主控芯片的多气体浓度检测系统,对该系统所设计的方案进行介绍.检测系统由上位机和下位机两部分组成.下位机部分包括硬件和软件设计,以同时兼顾性能和低功耗的设计理念实现了多气体浓度实时检测及显示、超过报警阈值进行声光报警等基本功能.下位机可以通过无线传输方式与上位机进行通讯.上位机基于QT平台编写,可以实时显示气体浓度曲线,便于用户在远端进行安全监控.在对系统性能测试后,结果表明:设计的系统检测精度可以达到±3% FS,具有误差小、易操作、携带方便、工作稳定等特点,能够更好地保障工作人员的人身安全,同时远程监控能力也使检测系统具有良好的实用价值.

Development of multi gas detection system based on Spectrum Technology

In order to detect the concentrations of various gases in real time,based on the principles of measurement of infrared absorption spectroscopy and electrochemical detection,STM32F103 as the main control chip of a multi-gas concentration detection system is designed.The design scheme of the system is introduced as followed.The detecting system is composed of two parts,that is the upper monitor and the lower computer.The lower computer includes hardware and software designs,realizing some basic functions such as the real-time detection of multi-gas concentration and display,over the alarm threshold for sound-light alarm and so on,with the design idea of both high performance and low power consumption.The lower computer communicates with the upper monitor through the wireless transmission mode.The upper monitor based on QT platform to program,displays the concentration curves in real time and is convenient for users to monitor security in the remote.After the system performance test,results show that the accuracy with ±3% FS of this detection system can be reached.Besides,the system has a little error,is easy to operate and carry,works stably and can secure personal better.Meanwhile,remote monitoring capability also makes detection system have good practical value.