Weighing in Motion
Description
Industry Advancements With In-motion Weigh Scale Technology
In-motion weigh scales are devices that are designed to measure the full weight of a vehicle as it moves through the measuring site (or in most cases, passed over the scale.) This advanced kind of weigh scale system does not require vehicles to come to a complete stop. Most in-motion scales only require the vehicle to slowly pass over the unit to make accurate weight calculations.
This technology is very useful because it allows vehicles to keep moving, helping operations increase throughout in their weighing processes. As a result, in-motion weighing technology is being integrated on many different applications, spanning from portable truck scales (or weigh pads) to in-motion rail scales on train track.
The Technology Behind In-motion Weigh Scales
The technology that is applied to these devices is high-end technology. Its sensors, primarily made of quartz crystals and placed on ground level, sense only the normal force that acts on the sensors (i.e. the force perpendicular to the ground, vertical force). Thus, the speed and the friction are not measured, leaving space only for the vehicles weight.
The quarts apply some electric charge that is proportional to the vehicle’s weight force. Through the use of physics, scientists have managed to form a formula to calculate the weight using that technology. But weighing in motion (WIM) devices are not all made of the same technology. There are several kind of WIM units.
- Laser system WIM devices – They basically measure the displacement of the rail as the vehicle moves through it. Through some calculations they manage to calculate the weight.
- Load cell system WIM units – They calculate the weight of the vehicle by measuring the constriction of the strain in the load rather than the rails.
- Fiber optical measuring WIM devices – These systems measure the change of light ray illumination that is primarily produced by bending.
Applications of In-motion Weighing Scales
Below are a few of the most common applications of in-motion weighing scales:
1. This technology can also measure train’s weight. Otherwise known as in-motion rail scales, these simple systems are deployable within 30 minutes and requires no maintenance. The revolutionary and enhanced algorithms that are encompassed in the WIM’s software allow for a very accurate measurement. In-motion rail scale systems allows for a very quickly and accurate measurement of
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