Simplified road net model orientated real-time road condition information acquisition system on basis of GPS (global positioning system) terminal

Abstract

The invention provides a simplified road net model orientated real-time road condition information acquisition system on the basis of a GPS (global positioning system) terminal, and belongs to the field of road information acquisition. In the simplified road net model orientated real-time road condition information acquisition system, GPS positioning information of a car is acquired by the GPS terminal in real time; aiming at cars from different precursor node directions, time Ts when a car travels to a start node of a road section S and time TE when the car travels to an end node of the road section S are respectively judged and recorded, time difference value T from the time at the start node of the road section to the time at the end node of the road section is computed according to a formula T=TE-Ts, the time difference value T is taken as the travel time on the road section, and the travel time and numbers of corresponding precursor nodes are transmitted to a server; the travel time on the road section S is periodically collated by the server, average time of the travel time on the road section S of the cars from different precursor node directions in a period is computed, so that time information of the road section S is updated. The simplified road net model orientated real-time road condition information acquisition system on the basis of the GPS terminal is low in data acquisition volume and small in transmission quantity, and can obtain the latest road condition information of the current road net accurately in time.

Description

technical field [0001] The invention relates to a road network model of intelligent transportation and an information collection technology in the field of communication, in particular to a GPS terminal-based real-time road condition information collection system oriented to a simplified road network model. Background technique [0002] With the rapid economic and social development, the number of vehicles in our country is increasing rapidly, which poses a huge challenge to the current traffic. As we all know, vigorous road construction still cannot solve the problem of urban road congestion during rush hour. Various forms of vehicle-mounted GPS terminals usually provide people with the shortest travel route, but cannot provide the travel route with the shortest travel time. The reason is that the current road network information based on GPS terminals is distance rather than travel time. Road network information cannot be updated in real time. [0003] In the Chinese inv...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: first, the data transmission frequency is high, the data volume is large, and consumes resources; second, the real-time positioning data sent by the GPS terminal is biased or invalid, and the server takes more time to identify these data; third, the real-time nature of the system The server is required to correctly process a large amount of information on the huge road network in a short period of time, and the performance requirements of the server are relatively strict. Whether it can be processed in a timely manner is unknown

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