Navigation head for auto-changing scale and method thereof

Abstract

The invention belongs to the technical field of navigation, and provides a navigation device which can automatically replace scale, and a method thereof. The navigation device which can automatically replace scale comprises a receiving module, a display module, a comparison module, a timing module and a first judging module, wherein the receiving module receives related information from a satellite system; the display module displays an electronic map; at least one standard value is set in the comparison module which receives vehicle running speed output by the receiving module and compares the vehicle running speed with the standard value to determine the section of the running speed; the timing module is connected with the comparison module and calculates the time of a vehicle in a section; and the first judging module receives a time value calculated by the timing module, and determines corresponding scale when the time value is more than or equal to a preset standard time value according to the section of the running speed, then the electronic map with determined scale is displayed on the display module. The navigation device can automatically replace the scale according to the vehicle speed and characteristics of roads, so as to provide convenience for users to watch paths displayed in the electronic map, be favorable for accurate acquisition of detail information on the surrounding of the position of users, and guide the users better.

Description

Technical field [0001] The invention relates to a navigation device and a method for changing a scale, in particular to a navigation device and a method for automatically changing a scale. Background technique [0002] Navigation devices have been widely used. In the prior art, the display module of the navigation device displays the electronic map and the route planned by the navigation device at a fixed scale, and the user drives the vehicle under the guidance of the route. [0003] However, in the actual driving process, the driving speed of the vehicle often changes. If the same scale is used to display the electronic map and plan the route at different driving speeds, it will cause inconvenience to the user. If the driving speed of the vehicle is high, the scale will appear too small, the map area displayed on the display module is relatively small and the path is short, and the user cannot drive the vehicle prospectively; if the driving speed of the vehicle is low, th...

AI Technical Summary

Problems solved by technology

[0003] However, in the actual driving process, the driving speed of the vehicle often changes. If the same scale is used to display the electronic map and plan the route under different driving speeds, it will cause inconvenience to the user.

If the driving speed of the vehicle is high, the scale will appear too small, the map area displayed on the display module is relatively small, and the path is short, and the user cannot drive the vehicle prospectively; if the driving speed of the vehicle is low, the scale will be smaller It will appear too large, and the displacement of the vehicle in a short period of time will not be obvious on the electronic map, and the user will not be able to obtain detailed information about the surrounding area.

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