Unlock instant, AI-driven research and patent intelligence for your innovation.

A floating car map matching data preprocessing method and system

A data preprocessing and map matching technology, applied in the direction of road vehicle traffic control system, traffic control system, instruments, etc., can solve the problem of inaccurate heading angle, and achieve the effect of improving accuracy and matching performance

Inactive Publication Date: 2016-06-01
BEIJING WATCH DATA SYST
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method and system can use GPS historical positioning data to solve the problem of inaccurate course angle when the vehicle is running at low speed, and the drift problem of GPS positioning data when the vehicle is stationary, thereby improving the accuracy and performance of map matching, so as to correctly map The positioning data is matched to the corresponding road section and the congestion analysis is performed to provide comprehensive positioning technical support for urban road congestion charging

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A floating car map matching data preprocessing method and system
  • A floating car map matching data preprocessing method and system
  • A floating car map matching data preprocessing method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0053] Such as figure 1 As shown, a floating car map matching data preprocessing method for urban road congestion analysis includes the following steps:

[0054] S1, Step 1: Initialize system parameters;

[0055] S2, Step 2: Receive GPS positioning data, gyroscope and accelerometer data, and extract the GPS velocity V_GPS, the angular rate value G_Ang of the heading angle measured by the gyroscope, and calculate the difference Acc between the accelerometer measurement value and the gravitational acceleration g;

[0056] S3, step 3: judge whether it is the first positioning, if it is the first positioning, then update the positioning data, assign the current positioning data (latitude and longitude) to BL_Cache (Len_Cache), end the preprocessing, otherwise continue the subsequent steps to process;

[0057] S4, Step 4: Determine whether the veh...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method and system for preprocessing map matching data of a floating car. The method of the present invention comprises the following steps: initializing the system parameters; receiving GPS positioning data, gyroscope and accelerometer data, and extracting the GPS speed, the angular rate value of the heading angle measured by the gyroscope, and calculating the accelerometer measured value The difference Acc with the acceleration of gravity g; determine whether it is the first positioning, determine whether the vehicle is stationary, and determine whether the vehicle is driving at a slow speed, and perform operations such as updating positioning data according to the judgment situation. The method and system of the present invention can use GPS historical positioning data to solve the problem of inaccurate course angle when the vehicle is running at low speed, and the drift problem of GPS positioning data when the vehicle is stationary, thereby improving the accuracy and performance of map matching , so that the positioning data can be correctly matched to the corresponding road section and the congestion analysis can be performed to provide comprehensive positioning technical support for urban road congestion charging.

Description

technical field [0001] The invention belongs to the technical field of vehicle-mounted positioning for intelligent transportation, and in particular relates to a method and system for preprocessing map matching data of a floating vehicle for analysis of urban road congestion. Background technique [0002] The urban road traffic congestion analysis technology based on GPS floating vehicles is considered to be an important way to achieve advanced traffic guidance. As a new detection method, how to improve its detection performance is the core issue at present. Urban road congestion analysis mainly includes floating car GPS positioning data acquisition, map matching, road section traffic status and road network congestion calculation, traffic decision-making, etc. [0003] The Global Positioning System (Global Positioning System, referred to as GPS) provides real-time, all-weather and global navigation services, and can provide functions such as vehicle positioning and driving ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/26G08G1/01
CPCG01C21/30G08G1/0112G01C21/165
Inventor 余振华
Owner BEIJING WATCH DATA SYST
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com