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Weigh-in-motion or weighing-in-motion (WIM) devices are designed to capture and record the axle weights and gross vehicle weights as vehicles drive over a measurement site. . Unlike static scales, WIM systems are capable of measuring vehicles traveling at a reduced or normal traffic speed and do not require the vehicle to come to a st
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List of auto parts This page was last edited on 15 October 2024, at 14:15 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...
Sensors provide analogs to human senses and can monitor other phenomena for which humans lack explicit sensors. Simple Touch: Sensing an object's presence or absence. Complex Touch: Sensing an object's size, shape and/or hardness. Simple Force: Measuring force along a single axis. Complex Force: Measuring force along multiple axes.
A Fast Falling Weight Deflectometer (FFWD) is a FWD with pneumatic or electric actuators rather than hydraulic, making the mechanics several times faster. A Heavy Weight Deflectometer (HWD) is a falling weight deflectometer that has higher loads (typically 300 kN to 600 kN), used primarily for testing airport pavements.
A measuring cup, a common instrument used to measure volume. Buoyant weight (solids) Eudiometer, pneumatic trough (gases) Flow measurement devices (liquids) Graduated cylinder (liquids) Measuring cup (grained solids, liquids) Overflow trough (solids) Pipette (liquids) If the mass density of a solid is known, weighing allows to calculate the volume.
A weigh belt. This is typically mounted on a weight transducer which can typically be a strain-gauge load cell or a servo-balance (also known as a force-balance), or sometimes known as a split-beam. Some older machines may pause the weigh bed belt before taking the weight measurement. This may limit line speed and throughput.
For dynamic track scales with force sensors, several force sensors are drilled and pressed into the track. When a train passes over the scales at up to 30 km/h, the rail is deformed by the mass of the vehicle (deformation). The change in material stress deforms the sensor, in which strain gauges are mounted as in a classic load cell.