Design of wireless portable multi-gas detector based on FreeRTOS

This paper presents a wireless portable multi-gas detector based on FreeRTOS, designed to address the complex challenges faced in detecting toxic and harmful gases in underground mining environments. These challenges include heavy detection tasks, limited data storage, and inconvenient data transmission. To tackle these issues, the design utilizes an STM32 microcontroller as the core processing unit, coupled with various gas sensors for detecting target gases. The detector samples sensor signals using an Analog-to-Digital Converter （ADC） module and applies a Kalman filtering algorithm to process the raw data, improving accuracy and effectively reducing the noise affecting the detection results. For data transmission, high-speed and low-power WiFi communication technology is used to interact with a cloud platform, enabling data storage and visualization. This functionality not only enhances data processing efficiency but also facilitates remote viewing and data analysis. To further enhance the system’s reliability and stability, the detector integrates the FreeRTOS embedded real-time operating system, leveraging its multi-threading capability to simultaneously detect CH₄, CO, and H₂S gases, significantly reducing data loss during detection. Test results show that the detector offers excellent portability, high accuracy, and good stability. Its design effectively improves the efficiency of toxic and harmful gas detection in underground mining, providing an advanced solution for mine safety management. The detector also has significant application prospects and promotional value, greatly enhancing the safety of mining operations. Overall, the wireless portable multi-gas detector based on FreeRTOS provides an efficient and reliable technical means for detecting toxic and harmful gases in underground environments.