Les fonctions du profileur de surface de route

The result of road surface profiler is almost continuous data. The road surface profiler generates far more data than the normal rut bar with 3, 5, or even 10 sensors. The road surface profiler can generate indicator statistics for an operator defined interval. The economic practicability of this technology is more reflected in the data obtained can be used to calculate Ride comfort indicators.

The article includes several parts below:

1. Obtain continuous data

2. Generate indicator statistics

3. Get the road profile of the highway more faithfully 

1. Obtain continuous data

The main data obtained from the road surface profiler is a 4.6-meter-wide contour formed by 943 points. The average spacing of points is 5 mm. For the grasp of the road profile, such sampling results are almost continuous data. This cross range covers most lane widths and allows for measurement of shoulder condition cross coverage up to road markings or fog lines. Thus, the specific location of the generated road profile can be associated with these markers.

The road surface profiler generates far more data than the normal rut bar with 3, 5, or even 10 sensors. However, the goal is not to get more data, but to get a more accurate picture of the road. Road surface profiler's software calculates all the major metrics and can process rut bar data for 3 or 5 sensors in preparation for linking new and historical data.

2. Generate indicator statistics

On network-level road surveys, the road surface profiler can generate indicator statistics for an operator defined interval. In terms of project-level requirements, the road surface profiler software can generate not only index data, but also raw or grated road profile data, which can be exported to other software, such as the geometric design software used to optimize road surface excavation and filling.

The road surface profiler’s installation height is 2.15m above the road surface, which will not be damaged in fender bender accident, while the sensor using Rut bar will be completely destroyed in such accident. The road surface profiler optimizes the accuracy of high and low profile measurements because it oversamps at 24 times the output frequency. A high-speed electronic circuit is used to calculate averages before recording.

3. Get the road profile of the highway more faithfully 

Road surface profiler allows you to get the road profile of the highway more faithfully. However, the economic practicability of this technology is more reflected in the data obtained can be used to calculate Ride comfort indicators, such as International Roughness Index (IRI), Ride Number (RN) and so on.

The measurement of ride comfort is realized by processing the contour point data along one or more longitudinal and travel direction lines obtained by continuous horizontal scanning. Generally, the longitudinal line is selected on the path passed by the left and right wheels. At the same time, the vertical acceleration of the road surface profiler is integrated twice to obtain the relative movement distance in the vertical direction. This process is the same as that used in all the GM techniques. The unique feature of road surface profiler is that the operator can control the position and number of longitudinal lines after data collection. In the existing system, the position of the longitudinal line is determined by the position of the sensor and the position of the measured track.