Surface roughness measuring system and method based on successive two-angle method

Abstract

The invention relates to a surface roughness measuring system and method based on a successive two-angle method. The front ends of the middles of two rear connecting rods are connected with a middle wheel through a middle shaft, and the rear ends of the middles of the two rear connecting rods are connected with a rear wheel through a connecting rod shaft; both sides of the middle shaft are respectively connected with a front connecting rod, and the front ends of the two front connecting rods are connected with two front wheels through a connecting rod shaft; a distance encoder is mounted at one end of the connecting rod of the rear wheel, an angle encoder is fixed at the one end of one of the front connecting rods, a gyroscope sensor is mounted on the two rear connecting rods, and the distance encoder, the angle encoder and the gyroscope sensor are connected with a portable computer through a data acquisition card. The distance encoder is used measuring pulse in an advancing direction; the angle encoder is used for measuring changes of the included angles of the connecting rods; the gyroscope sensor is used for measuring the inclination angle during the measuring process and inputting measured signals into the computer through the data acquisition card to compute collected data through the principles of the successive two-angle method, to obtain the cross-section diagram of a road surface to be measured and the standard deviation of the roughness of the road surface, and to convert the standard deviation of the roughness of the road surface into international roughness index (IRI).

Description

technical field [0001] The invention relates to a road surface and other plane measurement system, especially a flatness measurement system and measurement method used in the construction and maintenance of various planes such as high-grade highways, airport runways, indoor corridors, and ground. Background technique [0002] The basic function of the pavement is to provide a fast, safe, comfortable and economical running surface for the vehicle, and the running quality of the pavement is the main aspect to measure the basic function of the pavement. The quality of the road surface is related to many factors such as the flatness characteristics of the road surface, the vibration characteristics of the vehicle suspension system, the human response or acceptance of vibration, the performance of the vehicle locomotive, and the friction performance of the tires. From the perspective of road conditions, the main factor affecting road driving quality is the smoothness of the road ...

AI Technical Summary

Problems solved by technology

For the three-meter ruler, this method has a simple structure and is easy to carry, but it has large human factors, low precision, and low measurement efficiency. In addition, the 3-meter ruler cannot reflect the influence of fluctuations on the road surface at longer wavelengths on the ride comfort. The long-wavelength road surface cannot be measured; the continuous type roughness meter has high efficiency, but its structure is complicated, and it is greatly affected by environmental variables, and the measurement is not ideal under bumpy road conditions; the laser road surface roughness meter has high efficiency and high precision, but its structure is complicated. The cost of manufacturing and maintenance is high; since the bump accumulator accumulates one-way displacement, it cannot be used to measure road surfaces with drastic changes in smoothness, and is also greatly affected by vehicle speed. Since it is a responsive detection method, it cannot measure the road surface The profile curve of the vertical section is also not suitable for the acceptance of new road construction; for the precision level, when measuring, the collimation axis of the level and the level axis must be parallel to each other. When this condition is not met, the accuracy of the measurement results will be affected At the same time, it will waste a lot of manpower and material resources, and the measurement accuracy is not high

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