Method and device for preprocessing floating car data

Abstract

The invention discloses method and device for preprocessing floating car data and relates to the field of intelligent traffic. The invention solves the problem that the prior art can not distinguish whether the data generated when a floating car generates GPS data in a parking state is passive parking data or active parking data . The method comprises the following steps of: filtering error data in the original floating car data; restoring the floating car data after filtering the error data in a unit of a car; and distinguishing the passive parking data and the active parking data from the floating data generated by each car according to the floating car data information. The embodiment of the invention is mainly applied to an intelligent traffic processing system.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to a method and device for preprocessing floating car data. Background technique [0002] Floating car technology is one of the technical means to obtain road traffic information in the international intelligent transportation system. The floating car processing system is based on the floating car data, that is, the position information recorded by the GPS terminal (Global Positioning System, Global Positioning System) during the driving process of the floating car, and then through data preprocessing, map matching and other related calculation models, so that the floating car The car data and the urban road network are correlated in time and space, and finally traffic congestion information such as vehicle speed and travel time on the roads passed by the floating car are obtained. If a sufficient number of floating vehicles are deployed in the city, dynamic and real-time ...

AI Technical Summary

Problems solved by technology

[0003] Because the GPS terminal on the floating car is sometimes blocked by buildings or other objective reasons, there may be some erroneous data or drift data in the obtained data of the floating car, or because the floating car is in the active parking state for a certain period of time Interference data will also be generated when the vehicle is in a driving state or when an empty vehicle is waiting for passengers on the side of the road. If these abnormal data are not preprocessed, the floating vehicle processing system will not be able to accurately calculate the traffic information, and thus make a misunderstanding of the road traffic condition. sentence

[0004] However, the inventor found that the floating car processing system in the prior art has the following problems in the preprocessing of the floating car data: when the floating car is in the parked state, the validity of the GPS data generated when the floating car is in the parked state cannot be effectively judged. For example: when the floating car is in a passive parking state, such as when the vehicle encounters traffic lights or traffic jams, the data of the floating car at this time is valid data and needs to be preserved

However, when the floating car is in the active parking state, such as empty car for guests, parking for rest, etc., the data of the floating car at this time is abnormal data, which needs to be filtered out

At this time, the floating car processing system in the prior art cannot effectively identify the GPS data generated when the floating car is in a parked state.

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