Navigation apparatus

一种导航装置、坐标位置的技术，应用在道路网导航仪、仪器、地图/平面图/图表等方向，能够解决减少到数十次乃至100次左右等问题，达到防止再次消除的效果

Inactive Publication Date: 2008-10-01
AISIN AW CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the upper limit number of times of writing map information in a portable storage medium equipped with a flash memory is further reduced to about tens or even 100 times.
In addition, there is also the problem of needing to protect the copyright of the map information written in the portable storage medium.

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment

[0034] Outline structure of navigation device

[0035] First, based on figure 1 , the schematic configuration of the navigation device according to the present invention will be described. figure 1 It is a block diagram showing the navigation device 1 according to this embodiment.

[0036] Such as figure 1 As shown, the navigation device 1 involved in the present embodiment includes: a current location detection processing unit 11, which detects the current position of the vehicle; a navigation control unit 13, which performs various calculations according to the input information; an operation unit 14, It accepts operations from the operator; the liquid crystal display 15 is used to display information such as maps to the operator; the speaker 16 is used to output voice prompts related to route guidance and the like; Communication between the road traffic information center (VICS (registered trademark)) or the map information distribution center, etc. through the mobile...

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Abstract

An object is to provide a navigation apparatus capable of preventing a decrease of upper limit of how many times map data is written into a portable storage medium. A CPU (41) reads out an initial radius and an adding-radius from a ROM (43) and calculates a calculated radius by sequentially adding the adding-radius to the initial radius. The area within the calculated radius centering on a coordinates position of a central geographic point is set as map data extracting-region and the map data of each secondary mesh within the map data extracting-region is sequentially read out from a CD-ROM (6). Then, when the storage capacity of the map data within the map data extracting-region exceeds a maximum storage capacity of a SD memory card (7), the CPU (41) deducts the adding-radius from the calculated radius. The CPU (41) sequentially reads out from the CD-ROM (6) the map data of the each secondary mesh within the map region to be stored as the calculated radius of the writable map region to be stored into the SD memory card (7) and sequentially writes it into the SD memory card (7).

Description

technical field [0001] The present invention relates to a navigation device, in particular to a navigation device which writes information into a portable storage medium and reads information from the portable storage medium. Background technique [0002] Conventionally, there have been various proposals for a navigation device that writes information to a portable storage medium and reads information from the portable storage medium. [0003] For example, as a navigation device using a writable portable storage medium such as a PC card, there is a navigation device that has a storage drive for storing setting items in programs set on the operating system. Write to a portable storage medium, read from the portable storage medium, and transfer to the above program (for example, see Patent Document 1). [0004] According to this configuration, in order to realize the navigation function of reading map information from a storage medium such as a CD-ROM to perform route search ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/26G01C21/34G09B29/00
CPCG01C21/32G01C21/387G01C21/3881
Inventor 梅村智哉武内健辅
Owner AISIN AW CO LTD
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