基于stm32的手持式气体检测仪

Handheld gas detector based on stm32

摘要:

在日常生活及工作中，为了对有害气体进行有效的实时监测，避免长期处于有害气体的环境中从而对人员健康产生危害，针对目前国产气体检测仪最小检测浓度过高、响应时间过长、检测误差较大的问题设计了一种基于STM32的手持式气体检测仪；主要从内部硬件设计以及软件设计两个方面完成了手持式气体检测仪的设计，硬件方面的主控芯片选择STM32F103芯片，软件方面基于嵌入式系统开发实现对于VOC气体、温度、大气压力的测量、显示、数据存储以及数据分析，主要利用C语言来实现其功能；通过对整个检测仪系统的调试，证明这一系统能够对100ppb以下气体浓度进行响应、响应时间能够小于20s、检测误差能够小于5%FS；本气体检测仪除了普通环境的气体浓度监测，还能应用在有气体泄漏或空气质量要求的化学、工业、农业、动植物培育等场景。

Abstract:

In daily life and work, in order to effectively monitor the harmful gas in real time and avoid being in the environment of harmful gas for a long time, which is harmful to people's health, aiming at the problems of too high minimum detection concentration, too long response time and large detection error of domestic gas detector, a handheld gas detector based on STM32 is designed; The design of handheld gas detector is mainly completed from two aspects: internal hardware design and software design. STM32F103 chip is selected as the main control chip in hardware. In software, the measurement, display, data storage and data analysis of VOC gas, temperature and atmospheric pressure are developed based on embedded system, and its functions are mainly realized by C language; Through the debugging of the whole detector system, it is proved that the system can respond to the gas concentration below 100ppb, the response time can be less than 20s, and the detection error can be less than 5% FS; In addition to the gas concentration monitoring of ordinary environment, the gas detector can also be used in chemical, industrial, agricultural, animal and plant cultivation and other scenes with gas leakage or air quality requirements.