Road Slope Detection Method and System Based on Comprehensive Resistance Coefficient of Road Surface
A technology of drag coefficient and road slope, applied in the field of traffic information, to improve data accuracy, reduce data collection and calculation, and reduce manual intervention.
Active Publication Date: 2021-05-04
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 gradient detection method based on the comprehensive resistance coefficient of the road surface. The rolling resistance coefficient k of the road surface is calibrated on the straight road section; i ;Calculate the slope angle φ of each subsection according to the following formula i : ρ i =kcosφ i +sinφ i . Also disclosed is a road gradient detection system for implementing the road gradient detection method of the present invention, including a collection controller, a parameter setting module, and a vehicle traction force collection module connected to the signal input end of the collection controller, an angle encoder, The slope acquisition switch button and the calibration button; the acquisition controller is equipped with a calibration program and a slope acquisition control program. The invention can detect the slope of the whole road to be tested in sections, and improves the detection efficiency and 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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IPC IPC(8): G01C9/00B60W40/076B60W40/10
CPCB60W40/076B60W40/1005B60W2400/00G01C9/00
Inventor 徐世军徐子棋
Owner CHONGQING UNIV OF TECH