Online traffic volume monitoring system and method based on phase-sensitive optical time domain reflectometry

US9679478B2 · kind B2 · utility

Assignee

• University of Electronic Science and Technology of China · CN

Inventors

• Huijuan Wu · Sichuan, CN
• Yunjiang Rao · Hangzhou City, CN
• Ya Qian · Sichuan, CN
• Hanyu Li · Tongji, CN

Key dates

• Filing date: Apr 23, 2015
• Grant date: Jun 13, 2017
• Expiry date: Jun 7, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G08G1/02
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An online traffic volume monitoring system based on a phase-sensitive optical time domain reflectometry and its monitoring method are related to a field of intelligent transportation and an application of distributed fiber sensing. A vehicle moving temporal-spatial response graph is generated by accumulating differentiated Optical Time-Domain Reflectometry tracks at different moments in one unit monitoring period for traffic volume statistics, and then converted into a vehicle moving trajectory image through binarization and image pre-processing. Parameters of the moving vehicles are detected by utilizing a search-match method. A traffic volume, moving speeds, moving directions and locations are obtained respectively from detected trajectory number, and a tilt angle and pixel positions. The monitoring method is helpful to solve traffic congestion problem and informing drivers of real-time traffic volume, and contributes to realize an intelligent city traffic regulation.