基于多节点传感器阵列的气味溯源监测系统研究OA

Hazardous gas leakage at the boundaries of industrial plants and parks constitutes a critical hazard that triggers safety accidents and environmental pollution.Conventional single-point detection instruments,characterized by limited coverage and insufficient real-time performance,can hardly meet the practical requirements for rapid source tracing of pollution sources.In this study,an odor tracing and monitoring instrument system based on a multi-node sensor array was designed and developed for monitoring oxygen,carbon monoxide,combustible gas and total volatile organic compounds(TVOC).The system adopted a layered hardware architecture of "bottom-layer real-time control+upper-layer data processing":an STM32F103RCT6 microcontroller served as the core processor to complete multi-channel sensor data polling for S4-OXV(oxygen sensor),S4-CO(carbon monoxide sensor),SLP22A(combustible gas sensor),and S4-VOC(total volatile organic compound sensor),as well as temperature and humidity acquisition via a DHT11 sensor,while a Raspberry Pi 4B was responsible for interface display and algorithm processing.The system integrated an incremental PID closed-loop temperature control module to stabilize the temperature of the sensor gas chamber at the target value of 25 ℃,with a steady-state error of less than±0.2℃.A multi-node wireless network was constructed based on Tailscale,with an average round-trip data delay between nodes of approximately 45 ms and a packet loss rate of less than 0.5％over 24 consecutive hours of continuous operation.To address the issue of pollution source localization,a grid-based iterative tracing algorithm based on a distance attenuation model was proposed,achieving a positioning error of only approximately 2.12 m in simulations.With clear structure and complete functions,the proposed system provided a feasible engineering solution for odor monitoring and pollution source tracing in industrial parks and their boundary areas.