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Abstract To detect the concentration of toxic and harmful gases in the environment in a timely and effective manner, this article designs a multi-component gas measurement system based on the STM32 processor, which can effectively detect three toxic and harmful gases (CO, NO 2 , and SO 2 ), a gas detection terminal for the concentration of two greenhouse gases (CO 2 and CH 4 ) and an inhalable particulate matter (PM2.5), and a handheld display terminal that can display the measured gas concentration in real-time. A practical application circuit for electrochemical sensors has been designed, simplifying the design of driving amplification circuits. Finally, the feasibility of the system was verified through automobile exhaust experiments.
Qi et al. (Thu,) studied this question.
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