Fine roadbed grading using laser systems

Published on 18 February 2008

This is a method involving laser radiation using a base and a receiver system which receives the laser beam on a machine designed for roadbed regulation.

Laser and mechanical shovel (photo Razel)

To allow it to make contact with the receiver system wherever the machine may be, the laser transmits radiation over 360 degrees, in the form of pulses.
The receiver fitted on the machine shows whether the grading blade is too high or too low. Automatic control of the grading blade allows the required degree of accuracy to be obtained.

This system allows fully level roadbeds to be constructed - more complex surfaces may be built up by chaining plane levels together.
The limits on its use are those of the practical range of a laser beam, as well as if there is fog or a heat source between the transmitter and receiver.