On-vehicle navigation device and vehicle position correction method

一种车载导航装置、目标车辆的技术，应用在车载导航装置领域

Inactive Publication Date: 2007-05-09
CLARION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-described route guidance device poses a problem that, in an area including a plurality of map-matching candidate roads, automatic re-routing is not performed even if the target vehicle is actually located outside the recommended route

Method used

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  • On-vehicle navigation device and vehicle position correction method
  • On-vehicle navigation device and vehicle position correction method
  • On-vehicle navigation device and vehicle position correction method

Examples

Experimental program
Comparison scheme
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no. 1 example

[0020] FIG. 1 depicts the structure of a navigation system according to an embodiment of the present invention. The navigation system 1 in FIG. 1 indicates the position of the target vehicle on the road with improved map matching accuracy by using a captured image of the road ahead of the target vehicle. It is to be noted that the navigation system 1 mounted on the vehicle is capable of guiding the target vehicle to a destination set by displaying a road map. The navigation system 1 includes a control circuit 11 , a ROM 12 , a RAM 13 , a current position detection device 14 , an image memory 15 , a display monitor 16 , an input device 17 and an optical disc drive 19 . The video camera 2 is connected to the control circuit 1 , and the DVD-ROM 20 with the recorded map data is loaded into the optical disk drive 19 .

[0021] The control circuit 11 constituted by a microprocessor and its peripheral circuits uses the RAM 13 as its work area when executing control programs stored i...

no. 2 example

[0051]The second embodiment of the present invention will be described below. The navigation system in this embodiment prevents a phenomenon in which the position of the target vehicle is erroneously indicated on the road by map matching when the target vehicle that has entered an on-street parking area or the like is not actually driving on the road. It should be pointed out that since the structure adopted by the navigation system in this embodiment is the same as that shown in FIG. 1 (the first embodiment is described with reference to this structure), no further description is given here.

[0052] Assume that the target vehicle 100 driving on the road 300 turns left and enters the parking area 50 on the side of the road 300 , as shown in FIG. 5 . Road 300 and road 400 intersect beyond parking area 50 . In this case, if the distance between the position where the target vehicle 100 turns left and the road 400 is within a predetermined distance range set for map matching ca...

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PUM

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Abstract

An on-vehicle navigation apparatus comprises a subject vehicle position detection unit that detects a position of a subject vehicle and a direction along which the subject vehicle is advancing, a road marker line detection unit that detects a road marker line in an image of a road captured with a camera, a map matching candidate identifying unit that identifies a road to be designated as a map matching candidate, a decision-making unit that makes a decision as to whether or not the subject vehicle is traveling on the road identified by the map matching candidate identifying unit, a map matching unit that correct the detected subject vehicle position so as to set the subject vehicle position onto the road on which the subject vehicle is determined to be traveling, and a subject vehicle position indicating unit that indicates the subject vehicle position having been corrected.

Description

technical field [0001] The invention relates to a car navigation device, which indicates the position of a target vehicle on a road map by using map matching technology. Background of the invention [0002] A known map matching technique employed by in-vehicle navigation systems is to indicate the position of the target vehicle on the road map by correcting the target vehicle position detection results provided by GPS, gyroscope, etc. corresponding to the road layout, thereby ensuring the indication on the display The target vehicle will not mistakenly take an off-road position. However, in an area around, for example, a branch point, there are multiple roads in close proximity, so it is not always possible to accurately determine to which road the target vehicle position detection result should be corrected using this map matching technique. In this case, there is a possibility that the initially displayed road is not the road the target vehicle is driving on, and then the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/00G08G1/0969G09B29/00G09B29/10G01C21/30
CPCG08G1/0969G08G1/167G01C21/30G06K9/00798G09B29/106G06V20/588
Inventor 住泽绍男
Owner CLARION CO LTD
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