Vehicle navigator with accurate positioning function and navigation method thereof

Abstract

The invention relates to a vehicle navigator with an accurate positioning function and a navigation method thereof, belonging to the technical field of vehicle navigation technique. The vehicle navigator with the accurate positioning function comprises a satellilte navigation and positioning subsystem, a microprocessor subsystem and a data wireless communication and auxiliary accurate positioning subsystem which is used for dispatching between a vehicle management and control chamber and vehicles, interacting information, i.e. vehicle state, and the like, and also accurately positioning the vehicles, adopts a Zigbee standard data transmit-receive chip and enters a navigation positioning state based on a Zigbee wireless positioning technique by automatically starting a Zigbee positioning engine by a CPU of the system when the vehicles enter an area without GPS signals, thereby overcoming the defect of the accurate positioning and the navigation functions of the vehicles in a GPS signal fade area. The invention realizes the auxiliary accurate positioning of the vehicles by a Zigbee wireless communication and positioning engine technique, thereby achieving about 1.5 meters of the area navigation positioning precision of a navigation terminal.

Description

[technical field] [0001] The invention relates to the technical field of vehicle navigation in an intelligent transportation system (ITS), in particular to a vehicle navigator with a precise positioning function and a navigation method thereof. [Background technique] [0002] In recent years, the application of satellite global positioning system (Global Position System; GPS) navigation is in full swing all over the world. Taking Japan as an example, the penetration rate of GPS navigation in vehicles has reached nearly 60%, and that of Europe and the United States has reached more than 30%. [0003] GPS satellites generate two sets of codes, one set is called C / A code (Coarse / Acquisition Code 11023MHz); the other set is called P code (Precise Code 10123MHz). P code is less susceptible to interference due to its high frequency and has high positioning accuracy, but It is controlled by the U.S. military and has a code that cannot be deciphered by ordinary people. It mainly ser...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a vehicle navigator with precise positioning function that provides information services for travellers, effectively solving the precise positioning of customs, port areas, large parking lots and vehicle navigation and positioning problems in areas where GPS signals cannot enter. The regional navigation positioning accuracy of the navigation terminal involved in the invention can reach about 1.5 meters, which is nearly an order of magnitude higher than the simple GPS positioning accuracy, and realizes the high-precision navigation requirements of regional vehicles

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