Sparse GPS sampling point based method and device for fine moving track reduction

A technology of running track and sampling point, which is applied in the field of intelligent transportation research and GPS application, and can solve problems such as long time period, inaccurate track, and high cost

Active Publication Date: 2019-01-04
南京行者易智能交通科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing implementation method is to use high-precision intensive GPS sampling to complete, which requires a high-precision GPS sampler to sample, and the cost is high; the sampling interval is short, the time period is long, and rec

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  • Sparse GPS sampling point based method and device for fine moving track reduction
  • Sparse GPS sampling point based method and device for fine moving track reduction
  • Sparse GPS sampling point based method and device for fine moving track reduction

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Embodiment 1

[0074] attached figure 1 It is a schematic diagram of a method for restoring a fine running track based on sparse GPS sampling points of the present invention. In conjunction with this figure, the method mainly includes the following steps:

[0075] Step 1, through the vehicle-mounted terminal data acquisition unit, respectively collect site data and trajectory data of 3 shifts in the same direction of a new line in the bus operation process, the site data is the data collected at the bus site, and the site data The collection of is {shift number, time, station sequence, longitude, latitude, GPS signal}, the GPS signal is the position precision factor PDOP, the track data is the data collected at other points other than the bus station, and the track The set of data is {time, longitude, latitude}; the site data and track data are shown in Table 1 and Table 2:

[0076] Table 1.3 Station Data Sheet for Shifts

[0077]

[0078] Table 2. Trajectory data table for 3 shifts

[0...

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Abstract

The invention discloses a sparse GPS sampling point based method and device for fine moving track reduction. The method includes the following steps: step 1, collecting the station data and track dataof several shifts of public transport vehicles in the same line during operation through a vehicle terminal data acquisition unit; step 2, selecting one shift as a reference shift; step 3, constructing a track point model M for the track data according to the station data and the time parameters of the track data; step 4, judging whether a track point is a turn point; step 5, performing interpolation on the turn point; and step 6, performing interpolation on other track points. Through the method, effective bases can be provided for the management and decision of public transport companies, costs can be reduced, influences of weak GPS signals can be eliminated, and sampling periods can be greatly shortened; and a new precise line track can be generated through fast fitting by only drivingvehicles on a set track for several times.

Description

technical field [0001] The invention relates to the field of intelligent transportation research and the field of GPS application, in particular to a method for restoring traffic routes or running route trajectories, and in particular to a method and device for restoring fine running trajectories based on sparse GPS sampling points. Background technique [0002] With the rapid development of my country's transportation and the increase of urban passenger capacity, the bus lines continue to expand. How to quickly and accurately determine the actual running track of the newly added bus lines has become a major problem for bus companies. Traffic is facing enormous management pressure. How to determine whether the bus is running on the predetermined track has become an important management requirement of the bus company, so the track restoration technology of the bus becomes more important. The existing implementation method is to use high-precision intensive GPS sampling to comp...

Claims

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Application Information

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IPC IPC(8): G01S19/42
CPCG01S19/42
Inventor 赖运泉周金明周宇韩晓春
Owner 南京行者易智能交通科技有限公司
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