Visible light communication method and system for rail transit

• Main Authors: WANG SUIER, WU CHUNXIAO, ZHANG TIANFU, LI YANG, WANG SHENG, DING HUAN, LIU ZHEN, SUN GUOYING, QIAO YAQIONG
• Format: Patent
• Language: Chinese; English
• Published: 17.05.2024
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PHYSICS; SIGNALLING; TRAFFIC CONTROL SYSTEMS; TRANSMISSION

The invention provides a rail transit visible light communication method and system, and the method comprises the steps: determining a first coupling relation between the distance from a train to a signal machine and the angle in the train operation process, and determining the communication distance from a receiver to the signal machine and a first field angle according to the first coupling relation, determining a second coupling relationship between the distance to the signal machine and the transverse included angle of the receiver in the train operation process, and determining the offset distance of the photoelectric detection center relative to the lens center according to the first field angle and the second coupling relationship; or determining the deviation angle of the field angle of the receiver according to the two-coupling relation. The central wavelength and bandwidth of the optical filter are controlled, and the proper wavelength and bandwidth are selected to ensure the signal transmission qua