Traffic speed vehicle-mounted acquisition system and method based on mobile phone switch position

Abstract

The invention discloses a traffic speed vehicle-mounted acquisition and a method based on a mobile phone switch position. A set of entire and effective road journey traffic speed acquisition system and the method are formed by the collecting of a changing-over information data which changes continuously when the mobile phone is used, by adopting the steps of a changing-over road network data base calibration, a mobile phone user changing-over communication data acquisition, a mobile phone sampling road matching and a changing-over speed analytical calculation method. The method has the advantages of meeting the requirements of intelligent transportation system for the wide-area, comprehensive, real-time and dynamic collection of the traffic data, overcoming the shortcomings of being huge in initial investment, high in maintenance cost, worst in damage, limited in coverage area of collected the traffic data in the prior art. The acquisition system and the method facilitate to reduce the capitalized cost which is used for traffic data acquisition system device without the need of the installation of expensive global position system (GPS) position indicator.

Description

technical field [0001] The invention relates to the field of basic data collection of an intelligent transportation system, in particular to a vehicle speed collection system and method based on mobile phone switching and positioning. Background technique [0002] Traffic data collection is the primary and basic link of the entire intelligent transportation system. The traditional methods of collecting road traffic operating parameters (travel speed, traffic flow, travel time, etc.) mainly include coil detection, radar detection, and video detection. The disadvantages of traditional transportation basic data collection methods are as follows: [0003] 1. Coil detection method: By embedding a loop coil in the road, using the characteristic that the magnetic field of the coil will change when the vehicle passes through the coil, the traffic parameters such as traffic volume, vehicle location speed, and vehicle type are calculated. The coil detection method is a relatively mat...

AI Technical Summary

Problems solved by technology

The coil detection method is a relatively mature traffic parameter collection technology, which is widely used at present, but still has the following defects: 1) The content of traffic data collection is limited, and it is impossible to obtain important parameters of traffic planning such as road travel speed and road travel time; 2) coil The damage rate is high, and the operation and maintenance costs are high; 3) The coverage of the accessible area of ​​traffic monitoring is limited, and traffic data can only be collected in the places where coil facilities have been buried; Cause unnecessary damage, but also affect the normal use of the road

The microwave detection method mainly has the following defects: 1) In road sections with congested road conditions and many large vehicles, the measurement accuracy will be greatly affected due to occlusion, and the measured vehicle speed is only the instantaneous speed, which cannot be directly used for traffic Planning and management; 2) The cost of the instrument is high, and the initial investment cost is relatively large; 3) The space requirements for the installation of the instrument are relatively strict, and the installation of bridges, overpasses, and elevated roads will be limited by space; 4) Maintenance is difficult

The camera detection method mainly has the following defects: 1) The detection accuracy is easily affected by environmental factors such as bad weather, lighting, and shadows; 2) The camera dust needs to be cleaned regularly, which requires a lot of work, and it is difficult to deal with the dust inside the instrument

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