基于NDIR检测原理的CAN总线制冷剂泄漏监测系统

CAN Bus Refrigerant Leakage Monitoring System Based on NDIR Detection Principle

摘要: 为了对两相流冷却系统的多个监测点进行制冷剂浓度实时在线监测，研究设计了一种基于NDIR检测原理的CAN总线制冷剂泄漏监测系统。该系统主要由多台制冷剂浓度传感器和一台泄漏监测采集器构成。其中，传感器以GD32单片机为核心，基于NDIR原理控制R134a气体传感器模块完成数据采集，并通过CAN总线发送至采集器；采集器则负责接收各传感器数据，并进一步上传至上位机。由于CAN总线数据传输稳定且抗干扰能力强，系统不仅具备良好的扩展性，还能便捷地增设监测点。实验表明，该系统可对雷达冷却系统中R134a制冷剂的泄漏进行快速监测与报警，满足实际应用需求。

Abstract: In order to conduct real-time online monitoring of the refrigerant concentration data at multiple monitoring points of the two-phase flow cooling system, a CAN bus refrigerant leakage monitoring system based on the NDIR detection principle is designed. This system consists of multiple refrigerant concentration sensors and one refrigerant leakage monitoring collector. The sensor is based on the NDIR detection principle and uses the GD32 single-chip microcomputer to control the R134a gas sensor module and collect concentration data. The data is transmitted to the collector through the CAN bus. The collector is responsible for receiving data from each sensor and uploading the data to the upper computer via CAN bus. The system offers good scalability, allowing monitoring points to be added conveniently, while the CAN bus ensures stable data transmission and strong anti-interference capability. Experiments show that the system can rapidly monitor and alarm the leakage of R134a used in the radar cooling system, meeting the application requirements.