The action of frost and mechanical constraints due to the passage of trains expose the railways to significant mechanical stresses. In the long term, the track of the rails, sleepers and ballast geometrically degrade. Then, tamping, levelling and lining operations are necessary to restore perfect geometric quality.
At the same time, in order to ensure the safety of traffic, the rails and their surroundings must be regularly cleared so that the vegetation remains under control. Vegetation can damage railway infrastructure (creation of deformations, slippage or braking issues). As the use of phytosanitary products is increasingly restricted, mechanical operations to cut vegetation are necessary.
As for vegetation clearing, depending on track accessibility and relief, a worker drives a pruning machine, while others perform manual clearing of the railway perimeters with strimmers.
During tamping operations, a driver remains in the tamping machine while rail workers ensure that operations run properly, validate technical measures and check sweeping.
In both cases, the machines are noisy and do not allow communication by using conventional communication systems that do not have efficient filtering of surrounding noise;
The objective is both to protect workers from noise while allowing them to maintain a perception of their external environment (colleagues, arriving trains, warning devices, etc.)
The communication system must allow the working staff to be in constant contact and thus increase individual safety and efficiency of every workers without taking up their faculties and means to carry out their tasks.
Référence : VOKKER-GUARD-FCE001-PL(B)
Référence : VOK-GUARD-FCE02-O3-04-PL
Référence : VOK-GUARD-FCE05-06-07-08-PL