Navigation device and navigation method

A navigation device and road technology, applied in navigation, surveying devices, surveying and navigation, etc., can solve the problems of expensive cost and time, and achieve the effect of reducing the amount of information storage and calculation

Active Publication Date: 2010-07-28
歌乐牌株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, expensive and time-consuming

Method used

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  • Navigation device and navigation method
  • Navigation device and navigation method
  • Navigation device and navigation method

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Experimental program
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Embodiment Construction

[0079] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0080] (1. The overall composition of the navigation system)

[0081] figure 1 It is a schematic diagram showing a block configuration example of functions of the navigation system according to the embodiment of the present invention. Such as figure 1 As shown, the configuration of the navigation system 10 includes: a center device 1 installed in a traffic information center or the like; and an on-vehicle terminal device 2 installed in a vehicle such as a passenger car. At this time, the information transfer between the center device 1 and the vehicle terminal device 2 is carried out through a portable storage medium such as DVD (Digita Versatile Disk) 5, a communication network 3 composed of telephone lines or the Internet, and a base station 4 of a mobile phone network.

[0082] Here, the structure of the central device 1 includes: a central processing de...

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PUM

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Abstract

A central device uses a link shape compression unit to compress information of shape of ups and downs of a road link obtained from a three-dimensional road map, and calculates a geometry parameter based on variation of energy of a vehicle travelling on the road link. An on-board terminal device estimates the vehicle's average travelling pattern by using a travel-pattern-estimation unit based on the geometry parameter calculated by the central device, a link-travelling time estimated from statistically-stored traffic information, and a link length. The on-board terminal device further calculates fuel consumption of the vehicle travelling on each road link based on the estimated travelling pattern and parameters of the vehicle by using a fuel-consumption calculation unit, and then, searches a fuel-efficient route by using the fuel consumption as a link cost. The on-board terminal device has a vehicle-type selector for selecting a type of the vehicle. The present invention can reduce data size of information processed by the on-board terminal device, and facilitate application of a fuel-efficient route search to various types of vehicles.

Description

technical field [0001] The present invention relates to a navigation device and a navigation method for performing route search and route guidance for minimizing vehicle fuel consumption. Background technique [0002] A navigation system is a system that can search for a route from a starting point to a destination point and present the searched route to the driver. In this route search, generally, what kind of cost is required for each road segment (hereinafter referred to as link cost) is preset, and based on the link cost, a cost function is calculated for the route from the departure point to the destination point, and the extracted The cost function value becomes the smallest path. [0003] In a navigation system, generally, the travel time required for a route from a departure point to a destination point and the distance of the route (route length) are used as a cost function. In this case, on the road link, the travel time and the link length of the road link are s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/26G01C21/34
CPCG01C21/3469
Inventor 河野敏明伏木匠
Owner 歌乐牌株式会社
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