Laser evenness measuring system and method based on acceleration compensation

A technology of acceleration and flatness, which is applied in the field of laser flatness measurement system using accelerometer acceleration compensation, which can solve the problems of time-consuming, labor-intensive, dangerous use, and failure to output measurement results, etc.

Inactive Publication Date: 2010-12-15
WUHAN WUDA ZOYON SCI & TECH
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Problems solved by technology

[0029] The traditional flatness measurement equipment is mainly a spirit level, a three-meter ruler, and a continuous flatness meter. The test accuracy is low, the speed is slow, and the repeatability is poor. Generally, the measurement speed is less than 5 kilometers, which is time-consuming and labor-intensive. The highway in use is basically unusable
[0...

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  • Laser evenness measuring system and method based on acceleration compensation
  • Laser evenness measuring system and method based on acceleration compensation
  • Laser evenness measuring system and method based on acceleration compensation

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Embodiment Construction

[0058] The laser flatness measurement system based on acceleration compensation adopts the longitudinal section measurement method. The system uses a high-precision laser sensor to detect the vertical distance between the vehicle body and the road surface, and uses a high-precision accelerometer to detect the vehicle body when it is driving. The vertical displacement caused by body bumps, tire ups and downs, etc., is timely and accurately detected by the advanced wheel encoder synchronization system to obtain the position of a specific road section, and finally the international smoothness is obtained through reasonable and appropriate analysis and calculation using the high-speed computer synchronization system Indicators (IRIs). Therefore, this system can timely and comprehensively provide accurate information on road surface smoothness, including the precise spatial position of road sections and the information on the road surface roughness, etc., which can provide a powerfu...

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Abstract

The invention provides a laser evenness measuring system and a method based on acceleration compensation. The method of the invention comprises the following steps: at regular time interval, measuring the vertical distance between a specific point on a road vertical section and a car body; at the moment of measuring the distance, synchronously measuring the acceleration of the car body in the vertical direction; according to the progression of the recorded vertical direction, fitting the distance progression of the road vertical section and the car body with the least square method; carrying out quadratic integral to the recorded acceleration value progression to obtain a car body bumping value; according to the bumping value, fitting the bumping progression of the car body in the vertical direction with the least square method; subtracting the car body and road surface distance progression from the vertical bumping progression of the car body to obtain a road surface undulate progression; re-sampling the road surface undulate progression at the interval of 25 cm; and calculating to obtain the road surface evenness value according to 1/4 vehicle model. The invention can realize the evenness measurement with wide variable speed, high precision and high reliability.

Description

technical field [0001] The invention belongs to the field of instruments and meters, in particular to the field of road engineering instruments. The invention relates to a laser flatness measurement system and method, in particular to a laser flatness measurement system and method using accelerometer acceleration compensation. Background technique [0002] The roughness of the road surface mainly reflects the flatness of the profile curve of the road surface profile. When the profile curve of the road surface profile is relatively smooth, it means that the road surface is relatively smooth, or the flatness is relatively good. Otherwise, it means that the flatness is relatively poor. A good road surface The smoothness of the road surface is also required. [0003] Pavement roughness is an important index in pavement evaluation and pavement construction acceptance. The smoothness directly reflects the driving comfort of the vehicle and the safety and service life of the road ...

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Application Information

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IPC IPC(8): E01C23/01
Inventor 李清泉毛庆洲付智能李必军曹民张德津章丽萍
Owner WUHAN WUDA ZOYON SCI & TECH
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