Method for improving vehicle-mounted speed chart through GPS speed information

Abstract

The invention relates to a method for improving a vehicle-mounted speed chart through GPS speed information. The method includes the steps of collecting accurate speed information measured by a GPS under an open environment and the vehicle-mounted speed information of a vehicle-mounted speed collecting device to obtain a complementation coefficient, and correcting the vehicle-mounted speed information of the vehicle-mounted speed collecting device through the complementation coefficient when measurement of the GPS is not accurate. By means of the method, the defect that the vehicle-mounted speed accuracy is influenced by various factors is overcome; for instance, the defect that the vehicle-mounted speed measurement error occurs when the actual perimeter and the calibrated perimeter of a tyre are not consistent is overcome; meanwhile, the GPS measurement accuracy is prevented from being influenced by a complex environment.

Description

technical field [0001] The invention relates to the field of intelligent traffic control, in particular to a method for improving vehicle speed by using GPS speed information. Background technique [0002] With the continuous development of IT technology, all aspects of human production and life are gradually becoming informatized. The field of transportation and travel is no exception. Cars are becoming more and more intelligent. Various sensors have been installed on ordinary cars, which can transmit vehicle status information in real time; and multi-sensor data fusion technology is a hot field of current research. Through Fusion of information from different sensors can improve the accuracy and reliability of the magnitude. [0003] In terms of vehicle safety control, the requirements for the position and speed of vehicles are getting higher and higher. GPS is used more often, but the accuracy of GPS is greatly affected by the environment. In tunnels or "urban canyons" a...

AI Technical Summary

Problems solved by technology

GPS has been widely used in vehicle navigation systems. Most of the cars produced now have GPS, which is the main sensor for navigation and positioning. However, GPS is greatly affected by the environment. The main factors affecting GPS positioning are the environment such as buildings and trees. GPS satellite signals lead to an increase in GPS positioning errors. In an open environment, the positioning accuracy of the GPS receiver is relatively high, including coordinates and speed.

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