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A Method of Extracting Road Spectrum Parameters

A road spectrum and parameter technology, used in special data processing applications, geometric CAD, design optimization/simulation, etc., can solve the problem of rarely outputting road roughness data, etc., to improve car comfort and overall car quality, and reduce measurement. cost and the effect of enhancing R&D competitiveness

Active Publication Date: 2020-05-15
JILIN UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These devices have the characteristics of high measurement efficiency and fast response speed, but most of them are specially designed for road engineering. The measured indicators are directly oriented to the International Roughness Index IRI, and rarely output road surface roughness data, let alone output road surface spectrum parameters.

Method used

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  • A Method of Extracting Road Spectrum Parameters
  • A Method of Extracting Road Spectrum Parameters
  • A Method of Extracting Road Spectrum Parameters

Examples

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Embodiment 1

[0096] The vehicle-mounted mechanical accumulative bump meter has the advantages of high efficiency, simple operation, and low cost, and is widely used in road construction. In this embodiment, a vehicle-mounted mechanical accumulative bump meter is used as a measurement tool for extracting road spectrum parameters. The test speed of a certain type of vehicle-mounted mechanical cumulative bump meter selected is 30~80km / h, the test amplitude range is -20~20cm, and the minimum resolution is 1mm. The bump meter can simultaneously output the cumulative bump value VBI (cm / km) And the international roughness index IRI (m / km) index.

[0097] On the campus of Nanling Campus of Jilin University, seven 100-meter-long roads are selected, numbered JL-1, JL-2, JL-3, JL-4, JL-5, JL-6 and JL-7, among which 5 road sections (JL-1, JL-2, JL-3, JL-4 and JL-5) are used for cumulative bump value VBI and generalized international roughness index IRI E The correlation relationship is established, ...

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Abstract

The invention discloses a method for extracting road surface spectrum parameters, comprising the following steps: steps 1, establishing a 1 / 4 vehicle model, and establishing a calculation model of a generalized international flatness index IRIE at an arbitrary uniform vehicle speed u based on a calculation model of an international flatness index IRI; step 2, obtaining a relationship between the generalized international flatness index IRIE and the road surface spectrum based on the random vibration theory; and step 3, extracting the frequency index W and the road roughness coefficient Gq(n0)as road surface spectrum parameters based on the relationship between the generalized international flatness index IRIE and the road surface spectrum. The method for extracting road surface spectrum parameters provided by the invention is capable of realizing the establishment of a large number of measured road surface spectrum databases, and extracting the road surface spectrum with high efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of road surface feature measurement, in particular to a method for extracting road surface spectrum parameters. Background technique [0002] With the rapid development of my country's economy, the automobile industry has shown unprecedented vitality. As of June 2017, the number of automobiles in my country has reached 205 million. At present, the scale of my country's automobile market has ranked first in the world. Behind the huge market, consumers have a higher pursuit of the comfort and overall quality of the car, and the competition among major car manufacturers is also more intense. [0003] In 2005, in order to be in line with the world standard "Mechanical vibration—Road surface profiles—Reporting of measured data (ISO 8608-1995(E)", the Standardization Administration of China issued the "Mechanical Vibration—Road Surface Profiles—Reporting of Measured Data (GB / T 7031-2005)" replaces the old stand...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/20
CPCG06F30/15G06F30/20Y02T90/00
Inventor 李杰张振伟赵旗顾久
Owner JILIN UNIV
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