Beidou navigation vehicle-mounted terminal with ubiquitous locating function and system

Abstract

The invention discloses a Beidou navigation vehicle-mounted terminal with a ubiquitous locating function and a system. The Beidou navigation vehicle-mounted terminal comprises a road information module for acquiring road information, a signal acquisition module for acquiring the peripheral information of a vehicle, a signal judgment and switching positioning module for judging the position condition of the vehicle and the road information and selecting the locating mode, a positioning module, a data fusion processing module for integrating locating data and a ubiquitous locating navigation module, wherein the road information module and the signal acquisition module are connected with the signal judgment and switching positioning module respectively, the signal judgment and switching positioning module is connected with the data fusion processing module, and the data fusion processing module is connected with the ubiquitous locating navigation module. The combined strategy is adopted to perform integration on locating data, therefore, the locating precision is improved, the indoor and outdoor ubiquitous location is also realized, the using range of the positioning and navigation system is expanded, the Beidou navigation vehicle-mounted terminal can accurately navigate in urban areas with dense buildings, and the application level of the vehicle-mounted car navigation system is also improved.

Description

technical field [0001] The invention relates to the field of vehicle navigation, in particular to a Beidou navigation vehicle terminal and system with a pan-positioning function. Background technique [0002] At the end of 2012, China's Beidou satellite navigation system was put into operation, forming a regional positioning and navigation service capability covering the Asia-Pacific region. Started to officially provide continuous passive positioning, navigation, and timing services to the Asia-Pacific region. The system's positioning accuracy reached 10 meters horizontally, 10 meters above sea level, 0.2 meters per second for speed measurement, and 50 nanoseconds for one-way timing. The service performance is also comparable to that of GPS. [0003] The satellite positioning system is the most commonly used positioning system, which has good positioning performance in open outdoor environments, but in hot spots where people are active, such as indoors and urban areas, the ...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the positioning of existing navigation terminals is not accurate enough, and in hot spots where people are active, such as indoors and urban areas, the satellite signal will be weakened to the point that it is impossible to locate and navigate, and it is impossible to ensure positioning by using any navigation and positioning method alone. The problem of spatio-temporal continuum of services

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