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WIM systems can employ various types of sensors for measurement. The earliest WIM systems, still used in a minority of installations, use an instrumented existing bridge as the weighing platform. [38] [39] Bending plates span a void cut into the pavement and use the flexure as the wheel passes over as a measure of weight. Load cells use strain ...
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Electronic scales with PSI sensors measure air pressure in a vehicle's air suspension. [11] The scale relays this data to a receiver hardwired into the cab, [13] or wirelessly to a handheld unit such as a smart phone, either of which will interpret the data and display axle weight(s) and/or gross vehicle weight. Data may be further transmitted ...
There are weight detecting devices in the roadway itself. A driver may get a red light. On these occasions, the truck must pull into the weigh station for the normal weigh-in procedure. The most common reason a truck is "redlighted" is a weight problem, or a random check.
A strain gauge sensor measures the deformation of the elastic element, and the output of the sensor is converted by an electronic circuit to a signal that represents the load. Capacitive strain gauges measure the deformation of the elastic material using the change in capacitance of two plates as the plates move closer to each other.
Balance scale set, with weights Scales used to measure the weight of fruit in a supermarket Weighing scale in use in Tokyo Digital kitchen scale, a strain gauge scale Weighing scale for a baby includes a ruler for height measurement. A scale or balance is a device used to measure weight or mass.
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.
Speedometer; Tachometer; Odometer; Trip odometer; Oil pressure gauge; Coolant Temperature gauge; Battery/Charging system lamp; Low oil pressure lamp; Airbag lamp