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Step detection device and step detection method

A detection device and step technology, which is applied in the direction of measuring device, measuring distance, line-of-sight measurement, etc., can solve the problem of the decrease of step detection accuracy

Active Publication Date: 2018-03-27
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the angle formed by the tangent line of the step and the scanning horizontal line is small, the detection accuracy of the position of the step will also decrease.

Method used

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  • Step detection device and step detection method
  • Step detection device and step detection method

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no. 1 approach

[0040] Next, embodiments will be described in detail with reference to the drawings.

[0041] refer to figure 1 The overall configuration of the level difference detection device 1 according to the first embodiment will be described. The step detection device 1 detects the distance and orientation to the road around the vehicle and the surface of objects including curbstones on the road (hereinafter referred to as "road surface"), based on a plurality of lines set in the vehicle width direction of the road surface The height change of the road surface at the determination position of the step-shaped step is used to detect the step on the road surface.

[0042] Specifically, the step detection device 1 includes: a distance measuring sensor 12 that detects the distance and orientation to the road surface around the vehicle; Steps to a series of information processing microcomputers 13 .

[0043] An example of the ranging sensor 12 is a stereo camera capable of recording infor...

no. 2 approach

[0080] refer to Figure 7 The overall configuration of the level difference detection device 2 according to the second embodiment will be described. The step detection device 2 is at the first step judgment position (Pa 1 ) when the slope of the height change of the road surface is above the threshold value, the position is determined based on the first step (Pa 1 ) changes in the height of the road surface to detect steps (LD) on the road surface. Furthermore, in this case, in order to reduce the calculation load and increase the processing speed while maintaining the detection accuracy of the step, the step detection device 2 does not set the second step determination position (Pa 2 ), and the height change of the above-mentioned road surface at the second step determination position is not calculated.

[0081] Specifically, the road surface height calculation circuit 16 is equipped with the first step determination position (Pa 1 ) to the second comparator 20 for compar...

no. 3 approach

[0090] Sometimes the first step judgment position (Pa 1 ) and the intersection point of the step (LD), and the judgment position of the second step (Pa 2 ) and the intersection of the step (LD) are separated, and it is difficult to properly compare the difference in the slope of the height change of the road surface.

[0091] Therefore, in the third embodiment to the sixth embodiment, for the first step judgment position (Pa 1 ) to estimate the step existence range in which there is a step, and set the second step judgment position passing through the step existence range (Pa 2 ) example to illustrate. Specifically, the step detection device (3-6) is also equipped with a 1 ), a step existence range estimating circuit (21 to 24) for estimating a step existence range in which a step exists. The step judgment position circuit 15 judges the position with the second step (Pa 2 ) to set the second predetermined direction and the second predetermined distance in such a manner as...

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Abstract

A step detection device detects, using a distance sensor (12) mounted on a vehicle (Vc), the distance and direction to the road surface in the surroundings of the vehicle, and sets, on the road surface, a first step determination position (Pa1) and a second step determination position (Pa2). The step detection device then calculates, on the basis of the distance and direction to the road surface,the change in height of the road surface at the first step determination position (Pa1) and the second step determination position (Pa2), and detects a step (LD) on the road surface on the basis of the step determination position at which the change in height of the road surface has a large gradient.

Description

technical field [0001] The present invention relates to a step detection device and a step detection method for detecting a step (height difference) on a road surface. Background technique [0002] There is known a roadside object detection device that estimates the structure of the road surface around a vehicle using parallax images captured by a stereo camera, and detects roadside objects caused by roadside objects such as curbs based on the road surface structure. Step (refer to Patent Document 1). In Patent Document 1, the height of the road surface is scanned along the scanning horizontal line of the image, and a step is detected when the amount of change in the height of the road surface is equal to or greater than a threshold value. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: (Japanese) Unexamined Patent Application Publication No. 2014-002608 [0006] The problem to be solved by the invention [0007] As the angle formed b...

Claims

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Application Information

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IPC IPC(8): G08G1/16G06V10/48
CPCG08G1/16G06V20/588G06V10/48G08G1/166H04N13/204G01C3/085G01C7/04
Inventor 南里卓也A.基亚特植田宏寿方芳
Owner NISSAN MOTOR CO LTD
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