Road slope detection method and system based on comprehensive resistance coefficient of road surface
A technology of drag coefficient and road gradient, applied in the field of traffic information
Active Publication Date: 2019-07-09
CHONGQING UNIV OF TECH
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[0004] The existing collection and recording technology of traffic road information rarely involves the collection and recording of road surface information. In order to characterize the obstruction effect of the road on vehicles, the inventor hereby proposes the index of "road surface comprehensive resistance coefficient". The effect of road surface roughness and road slope on vehicle (wheel) action
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[0075] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0076] refer to figure 1 As shown, the road slope detection method based on the comprehensive resistance coefficient of the road surface includes the following steps:
[0077] Step 1: Select a straight road section on the road to be tested to calibrate the rolling resistance coefficient k of the road surface.
[0078] Straight road sections can be selected according to the following principles: the road is generally continuous, and the material, smoothness, dry humidity, and temperature of each section have little difference, so the rolling friction coefficient of the road surface in the section is roughly the same, so a flat Straight road section is calibrated. If there are road sections with large material, smoothness, dry humidity, and temperature differences on the road to be tested, it can be divided into several road sections with approximately the sa...
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The invention discloses a road slope detection method based on the comprehensive resistance coefficient of a road surface. The road slope detection method based on the comprehensive resistance coefficient of the road surface comprises the following steps: calibrating a road surface rolling resistance coefficient k on a flat and straight road section; collecting a road surface comprehensive resistance coefficient [Rho] of each section interval on a road section to be tested; and calculating a slope angle [Phi] of each section interval according to the following formula: [Rho]=k*cos[Phi]+sin[Phi]. The invention also discloses a road slope detection system, used for implementing the road slope detection method disclosed by the invention; the road slope detection system comprises an acquisition controller, a parameter setting module, and a vehicle traction force acquisition module, an angle encoder, a slope acquisition switch button and a calibration button separately connected to a signal input end of the acquisition controller; and a calibration program and a slope acquisition control program are arranged in the acquisition controller. The invention can segmentally detect the slope of the whole road to be tested, and improve the detection efficiency and the detection precision.
Description
technical field [0001] The invention belongs to the technical field of traffic information, and in particular relates to a road slope detection method and system. Background technique [0002] At present, for the detection of road slope, the main means used are image recognition, infrared detection, level instrument and ruler and so on. There are problems of low detection efficiency and low detection accuracy. Moreover, the real road scene has ups and downs and stretches continuously. Measuring the slope of a certain section of the road alone cannot reflect the slope of the entire road. Efficient detection of slope. [0003] When the vehicle is running on the road, the resistance it receives includes: road rolling resistance, road gradient resistance, vehicle acceleration resistance, and vehicle air resistance. Among them, the road surface rolling resistance and slope resistance of the vehicle are directly related to the road surface and are proportional to the weight of ...
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Login to View More IPC IPC(8): G01C9/00B60W40/076B60W40/10
CPCB60W40/076B60W40/1005B60W2400/00G01C9/00
Inventor 徐世军徐子棋
Owner CHONGQING UNIV OF TECH