Navigation system, and navigation method and device

Abstract

The invention provides a navigation system and a navigation method and device, wherein the navigation method comprises: calculating a navigation route based on a navigation request to obtain a guiding route; in a navigation process by the guiding route, detecting a distance between a current position and a next maneuvering crossing, which is a road crossing matched to prompt information in the navigation process; obtaining a distance represented by each screen pixel corresponding to each-grade display proportion of an electronic map, to determine a visual scope in the front of the current position under each-grade display proportion; adjusting the current display proportion of the electronic map, to make the visual scope and a detected current position adapted to the distance between the current position and the next maneuvering crossing. The technical scheme of the invention can implement automatic adjustment of the display proportion of the electronic map in the guiding process, to make sure that the next maneuvering crossing can always be properly displayed in the visual scope in the front of the current position.

Description

technical field [0001] The invention relates to the technical field of navigation, in particular to a navigation system, a navigation method and a device. Background technique [0002] With the development of the automobile industry, people pay more and more attention to the user experience when using a car while owning a car. Existing in-vehicle devices can already provide users with many services, including services for multimedia needs such as music, video, and pictures, as well as driving navigation services such as real-time traffic information and destination maps. In particular, the use of vehicle navigation systems is becoming more and more popular. The voice prompts of the navigation system can guide the user to drive, especially when driving in an unfamiliar city, the navigation system can help the user to reach the destination conveniently and quickly. [0003] Navigation electronic map (which can be referred to as electronic map or navigation map for short), als...

AI Technical Summary

Problems solved by technology

[0004] Since the navigation system can only display the partial electronic map and the guidance path obtained after the navigation calculus with a fixed scale (display scale), and the richness of content displayed under different scales is not the same, and in the navigation process, different places (For example, the distance from the intersection is different) the degree of attention to information is different, especially when the vehicle is driving to a road intersection such as a turn, a branch, and a high-speed entrance, it is necessary to provide an intuitive reminder of the follow-up direction, although usually the navigation system will Before arriving at the above-mentioned road intersections, voice navigation prompts are given, but the characteristics of the above-mentioned road intersections and surrounding information may not be displayed intuitively and clearly to the user with a suitable scale on the electronic map. For example, when the scale is small, it is difficult to reflect Details of road junctions

In the traditional navigation system, the scale does not change during the navigation process. If the user wants to change the scale, he needs to manually operate it. Undoubtedly, it will have adverse effects on driving safety

[0005] Related technologies can also refer to the Chinese patent application with publication number CN 101387521A, which discloses a method for adjusting the scale of the navigation map according to the driving speed of the vehicle. Although it can automatically adjust the scale of the navigation map, the size of the scale is affected by the driving speed. influence, and cannot intuitively show the navigation map that users want to see

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