How does a road surface profiler work?

A road surface profiler can reduce the impact of road texture on the measurement to get the road surface profiler's data from the cross-scan data processing. Another way the road surface profiler works is to generate a road topology on a uniform offline network. The road surface profiler has solved its data location problem.

The article will includes these points:

1.Horizontal scan data processing

2. Topological map and pavement crack measurement

3. Full lane coverage - good data correspondence

1. Horizontal scan data processing

One way to get the road surface profiler's data from the cross-scan data processing is to further reduce the impact of road texture on the measurement by using a certain number of data points within the range specified by the average operator. One extreme of this feature is the longitudinal grooves in the Portland cement concrete. Triangulation sensors typically sweep left and right in grooves because they have only a small projection point. The data obtained will contain very large noise signal, so the derived ride index is too large. On the other hand, if you can average the data points in a horizontal range of 8 to 15 cm, you can effectively remove the influence of these noise signals.

In the application of network level, the operator can process the data to obtain the desired left and right wheel trajectory profile. When the network application is large, you can enable a special data storage option for the road surface profiler that will only record data at the selected longitudinal profile location, at a specified spacing, such as 1 meter, 15 meter, or 25 meter. As with rutting measurements, ride comfort indicators can be generated at a distance specified by the operator, such as every 0.2 km.

2. Topological map and pavement crack measurement

Another way the road surface profiler works is to generate a road topology on a uniform offline network, with reflective data. Using a third party software, it can produce a three-dimensional profile of the road.

Road surface profiler users are already developing their own software to make the most of this data. The key direction of development seems to be to combine 3d scan data with high-resolution line-scan road image for road crack simulation.

3. Full lane coverage - good data correspondence

As the industry's experience with the new road surface profiler technology matures, its advantages in the form of full-lane four-dimensional images, three-dimensional contours and reflexes will be fully realized. The first problem road surface profiler has solved is data location. Road surface profiler can accurately determine the position of the vehicle in the lane and know the corresponding position of the calculated result. The test results of a rut bar have no such record. Since it is impossible to open the same path twice, especially after a year, it is difficult to locate the test results of rut bar, making it difficult to compare the test results at different times. The road surface profiler covers the lane markings so that the results can be reliably located and compared historically.