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Weigh In Motion (WIM) is the future of weighing. A Weigh In Motion system can be used to continuously and accurately weigh all vehicles passing the system, or used as a overload detector. A dynamic weighing station could be more cost efficient to set up and maintain than a traditional static weighing station.
Strengths of Weigh In Motion:
- Rail or road vehicles can be weighed while travelling, a significantly greater number of weighing tasks can be completed in a short period of time.
- More Weigh In Motion sites may be monitored at the same costs.
- A Weigh In Motion station can monitor the traffic without alerting drivers. This ensures more realistic and truthful data can be obtained.
Types of Weigh In Motion technology:
- Loadcell. The modern rail scales are all loadcell based systems.
- Piezoelectric Sensor. The most common WIM device used for highway/road traffic data collection.
- Bending Plate. The bending scale consists of steel platforms adjacently placed. The plates are instrumented with strain gages, which measures tire load induced plate strains. The measured strains are then analyzed to determine the tire load.
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