Floating car data processing device and method

A technology for floating car data and processing methods, which is applied in the field of floating car data processing methods and devices, and can solve the problems of slow driving of floating cars, long distances, large average speed errors, etc., and achieve the effect of improving accuracy and reducing errors

Active Publication Date: 2011-04-13
CENNAVI TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the above-mentioned road condition information calculation scheme, the inventor found that there are at least the following problems in the prior art: since only the GPS point data of the same floating car are used to calculate the average speed, the GPS point data generated by the same floating car There are particularities in the data, such as: the floating car is waiting for traffic lights, or the floating car is not driving slowly due to congestion, these may cause the average speed of the floating car to be far from the real road conditions on the corresponding road, resulting in the average speed large error

Method used

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  • Floating car data processing device and method
  • Floating car data processing device and method

Examples

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Embodiment 1

[0027] Each floating car has its own unique number (ID number). After the GPS point data with the ID number regularly recorded by the floating car is transmitted to the information processing center, the information processing center first collects the data within a certain period of time. Data is filtered for abnormal data to ensure the accuracy of subsequent data processing. The filtered exception data includes:

[0028] 1. The time information contained in the GPS point data exceeds the current time range. This type of data is caused by the time delay of the floating vehicle uploading data.

[0029] 2. The value obtained after multiplying the time difference between two adjacent GPS point data with the same ID number by the preset maximum speed value is smaller than the straight-line distance between the two GPS point data, and the two GPS point data are filtered.

[0030] 3. There is only one GPS point data with the same ID number.

[0031] The remaining GPS point data a...

Embodiment 2

[0054] It can be seen from Example 1 that after the information processing center receives the GPS point data transmitted by the floating car, it needs to filter all the data for abnormal data, and the remaining valid GPS point data after filtering the abnormal data needs to perform map matching and matching on a single floating car. Path inference to determine the operating road that each floating vehicle has traveled, and the time and location of the GPS points recorded by each floating vehicle on its operating road. The abnormal data filtering method, map matching method, and route estimation method provided in this embodiment are the same as those described in Embodiment 1, and will not be repeated here.

[0055] After map matching and route estimation, the running road corresponding to each floating car can be determined. This embodiment provides a floating car data processing method for processing the effective GPS point data collected by the floating car on its running r...

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Abstract

The invention discloses a floating car data processing method and a floating car data processing device, which relate to the field of traffic road condition information processing, and solve the problem of large error existing in the current average speed calculation methods. The floating car data processing method comprises the following steps: firstly, calculating the average speed of a floating car according to the effective GPS point data recorded by the floating car on a traveling road; then, calculating the average instantaneous speed of the floating car according to the instantaneous speeds included in all effective GPS point data on the traveling road; and finally, when the sum of the average speed and a preset speed is less than the average instantaneous speed, correcting the average speed by using the average instantaneous speed so as to obtain a corrected average speed. The method and the device disclosed by the invention have the advantages that: because the average speed is corrected by using the average instantaneous speed, the influence of special GPS point data on the average speed is reduced, thereby reducing the error of the average speed, and then improving the accuracy of calculation on the road condition information. The method and the device disclosed by the invention are used for dynamically acquiring traffic jam information in real time.

Description

technical field [0001] The invention relates to traffic road condition information processing, in particular to a floating car data processing method and device. Background technique [0002] Floating car (FCD, Float Car Data) technology, also known as "probe car", is one of the advanced technical means used in the international intelligent transportation system (ITS) to obtain road traffic information in recent years. [0003] The basic principle of the floating car technology is: the floating car equipped with the vehicle-mounted global positioning system (GPS) regularly records the vehicle position, direction, time and instantaneous speed information during its driving process, and generates a GPS point data, which is passed through the wireless communication system. Regularly and in real time, it is transmitted to an information processing center, and the information processing center performs abnormal data filtering, map matching and route estimation on these data, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01
Inventor 夏伟魏俊华胡健
Owner CENNAVI TECH
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