Road shape estimating device, road shape estimating method and program
A technology for roads and processing devices, which is applied to control devices, road network navigators, traffic control systems for road vehicles, etc., can solve problems such as inability to correctly estimate road shapes and large differences
Inactive Publication Date: 2009-09-30
AISIN AW CO LTD
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[0007] However, in the conventional road shape estimating device described above, when the minimum radius among the radii calculated by the three-point calculation method for the shape interpolation points of three adjacent points is calculated as the radius of curvature of the curve , in a curve with a large radius of curvature, the difference between the radius of curvature on the actual road and the calculated radius of curvature of the curve becomes large, so the road shape cannot be correctly estimated
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[0042] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0043] figure 1 It is a block diagram of the vehicle control system of embodiment of this invention. figure 2 is a main flowchart showing the operation of the road shape estimation processing device according to the embodiment of the present invention.
[0044]In the figure, 14 is an information terminal, for example, it is a navigation device as an on-vehicle device installed on a vehicle. A GPS sensor 15 as a current position detection unit; a data recording unit 16 as an information recording unit that records various information other than map data not shown in the figure; a navigation processing unit 17 that performs various calculation processing such as navigation processing ; the operation unit 34 used as the first input unit for predetermined input through the operation of the operator, that is, the driver; performs various displays through the ima...
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The present invention provides a road shape estimating device, road shape estimating method and program, whic can accurately estimate the road shape. The road shape estimating device has a data obtaining processing unit for obtaining interpolation point data for shape interpolation points, a radius calculation processing unit for calculating a radius of curvature at each of the shape interpolation points based on the interpolation point data, a corner detection processing unit for detecting a corner based on the radius of curvature at each of the shape interpolation points and for setting a candidate start point and a candidate end point, and a minimum radius calculation processing unit for setting a center ideal point based on the candidate start point and the candidate end point of the corner, a front ideal point on the candidate start point side of the center ideal point, and a rear ideal point on the candidate end point side of the center ideal point, and for calculating an ideal radius of curvature of the corner as a minimum radius.
Description
technical field [0001] The present invention relates to a road shape estimation device, a road shape estimation method, and a program. Background technique [0002] Conventionally, in a navigation device, for example, the current position of the vehicle is detected by GPS (Global Positioning System), that is, the current place, map data is read out from the data recording unit, and a map screen is formed on the display unit. The current location of the vehicle, a map of the surrounding area of the vehicle, and the like are displayed on the display. Therefore, the driver can drive the vehicle according to the position of the own vehicle displayed on the above-mentioned map screen. [0003] Also, after the driver inputs a destination and sets search conditions, a route search process is performed based on the search conditions, and a route from a departure point displayed as a current location to a destination is searched according to the above-mentioned map data. Then, th...
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IPC IPC(8): G01C21/26G01C21/34G01C21/36G05D1/02G08G1/0969G09B29/00G09B29/10
CPCB60W10/06B60W40/072B60W2550/143G01C21/32B60W10/11B60W40/076B60W2550/402B60W2552/20B60W2556/50B60W2552/30B60W30/18145G01C21/3844G01C21/3819G01C21/3837
Inventor 福元将高杉浦博昭东条健到
Owner AISIN AW CO LTD