Three-infrared-band flame detection method and system

The invention discloses a three-infrared-band flame detection method and system, and belongs to the technical field of flame detection. The invention aims to solve the problems that a single-band flame detector and a dual-band flame detector are easy to report a fire alarm by mistake when being interfered by an external infrared radiation source, and the detection distance is limited at the same time. Three infrared bands are used for monitoring infrared signals of the artificial heat source, the flame and the artificial light source respectively, flame information interfered by noise is recognized by analyzing the mathematical relationship among the three infrared band signals, the detection distance is increased, the sensitivity is improved, and the false alarm rate is extremely low. The system has the functions of detector working state output, system self-inspection, fire alarm event storage and reporting, and serial port instruction control. The device is suitable for fire alarm of smokeless liquid and g