A weigh-in-motion system has been developed to determine the weight of vehicles, without disrupting the traffic flow. The gathered information enables to synchronize the design parameters of the roads to the actual use, and to plan the necessary maintenance as efficient as possible.

Caused by the political attention to energy-efficient driving we notice a big change in the used tyre profiles (width and air pressure) in the transport area. This change will influence the deformation of asphalt. The rutting profile will change and the intensity will increase; the use and damage of the asphalt shall change. Collecting the measurement information due to these changes shall be very important for the predictability of maintenance and the type of asphalt to be used.

Weigh-in-Motion Fibre Optic;

The fibre optic sensors and detection loops that are used by the Weigh-in-Motion Fibre Optic system are installed below the top layer of the asphalt. Therefor they are maintenance free and interference. Because the sensor itself is build in several segments we are able to measure and register all kind of detailed information with extreme accuracy. Result is the huge information level compare to conventional systems.

The central unit can be installed up to 50 KM away from the sensor itself and is based on a standard TCP/IP interface connection easy to connect to other systems and accessible from remote. If a Weigh-in-Motion solution is planned to be used for penalties a connection to any ANPR-system or camera-system for registration can be realized quiet easy.

Conventional systems;

At the use of conventional systems the sensors and detection loops are installed in the top-layer of the asphalt. This indicates that after new asphalt is realized the sensors are milled in the top-layer. Point is that because of the use and the rutting profile the sensors need maintenance every year. This maintenance is replacement of correction of the top of the sensors. During big maintenance on the road (average every 5 year) the sensors and loops are destroyed and must be replaced. Big maintenance must be planned more often because of the damage of the smooth structure of the asphalt by the installation of the sensors. During temperature changes in summer and winter the sensors will let go from the asphalt and so a repair action of both the sensors as the road surface should be performed. This is a very expensive operation.

Information available by the Weigh-in-Motion Fibre Optic system of Infra Sensor Solutions?

Each 10 cm of a lane is supplied with a sensor using the WIM FO system. This makes it possible to display the pressure distribution of the lane caused by the passed traffic weight. Very important information to calculate the rutting profile. This graph gives an impression of the pressure distribution on a lane.



Information per passage direct available

Schermafbeelding 2015-09-03 om 17.00.06A report of the top 3 heaviest vehicles can be generated anytime:

WIM Heavy vehicles













Overview of design parameters compare to real use:

Schermafbeelding 2015-09-03 om 17.58.04