Pavement power spectrum measuring method based on vertical dynamic load of wheel

A technology of pavement power spectrum and measurement method, applied in the field of pavement power spectrum measurement based on vertical dynamic load of wheels, can solve the problems of large measurement error, small application range, poor dynamic stability, etc. small impact effect

CN108534753AInactive Publication Date: 2018-09-14YANSHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-09-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a pavement power spectrum measuring method based on a vertical dynamic load of a wheel. The method is implemented based on a designed test vehicle provided with a six-componentinstrument. The method includes the steps: firstly, acquiring a vertical dynamic load signal of a test vehicle tire by the aid of the wheel six-component instrument; secondly, building a relationshipbetween pavement roughness and the vertical dynamic load of the wheel, and calibrating an amplification factor of the test vehicle to obtain a pavement power spectrum; finally, identifying pavement roughness characteristics according to a power spectrum of the vertical dynamic load. According to the pavement power spectrum measuring method based on the vertical dynamic load of the wheel, the influence on a true value of the pavement roughness caused by pavement cleanliness is reduced, the method has good measuring dynamic stability, the designed test vehicle avoids vertical dynamic loads caused by vibration of an engine and rotation of a transmission system, measuring accuracy of vertical dynamic load spectrum of the wheel is improved, a pavement roughness characteristic identifying method is simple and visual, and a pavement is conveniently evaluated by workers.
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Description

technical field

[0001] The invention belongs to the field of road surface feature recognition, and in particular relates to a road surface power spectrum measurement method based on wheel vertical dynamic load. Background technique

[0002] The power spectral density function of the road surface is often used to represent the roughness of the road surface, and is used as the input unit for calculations such as vehicle dynamic response, suspension optimization and control, etc., and its description precision and accuracy directly affect subsequent research.

[0003] At present, the indirect measurement methods of acceleration sensors and laser sensors are mostly used for the collection and measurement of road surface power spectrum, which leads to problems such as large measurement errors, expensive equipment, and small application range. Among them, the commonly used laser profiler based on inertial reference has many disadvantages: (1) in the road surface detection, the sur...

Examples

Embodiment Construction

[0047] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0048] When the vehicle is running at a constant speed on an uneven road surface, the unevenness of the road surface will be directly expressed as the size and change speed of the wheel dynamic load. First, use the wheel sextant to collect the vertical dynamic load data of the tires of the experimental vehicle, then establish the relationship between the unevenness of the road surface and the vertical dynamic load of the wheel, and further obtain the road surface power spectrum by calibrating the amplification factor of the experimental vehicle, and finally according to the vertical dynamic load power spectrum Different components are used to identify road surface roughness features. Propose a kind of road surface power spectrum measuring method based on wheel vertical dynamic load of the present invention accordingly, as figure 1 As shown, the...