Truck scale is intended for weighing of commercial transportation, mainly to determine the weight of the freight. In order to determine the weight of the freight, the vehicle is often weighed twice - first with the freight, and then - without. Difference between the two attempts shall be the weight of the freight. Mobile axle scale is often used for vehicle axial load control purposes - to determine whether the permitted load is not exceeded.
For sports vehicles, weighing at axles is performed in order to obtain the desired weight distribution along the axles of the vehicle. Truck scale systems by design differ depending on the type in which the vehicle is being weighed - platform weighbridges - on which the vehicle is weighed as a whole or axle scales that weigh the vehicle at the axle and then by adding up the resulting weights at axles, the total weight of the vehicle is obtained. P1. Platform truck scale first of all differs depending on the material of the platform - steel or reinforced concrete. Reinforced concrete platform may be manufactured via two different approaches - metal frame is assembled, armature is put in place and concrete is laid at the place of set-up. Second approach - weighbridge is produced in a factory and transported to the place of set-up with the use of special transport.
Platform truck scale may be also set up in two different ways - at a ground level or at an above-ground level. Each of these truck scale set-up approaches has its advantages and drawbacks. When setting up the truck scale at a ground level, the foundation production cost increases, servicing is more difficult and there is a higher freezing risk during winter especially if the platform is made of concrete. Advantages - it is easier for the vehicle to drive onto the weighbridge and less space is required to set it up. In order to prevent soiling from entering between the platform and the foundation of the weighbridge when scales are set up at a ground level, a special T-profile rubber lining is used. This rubber lining is also used for above ground weighing platforms in order to protect the opening between the platform and the access ramp from dirt. Depending on the type of the lorry it is intended for, the length of the weighbridge may differ too. Most popular lengths are 12 m for waste management vehicles or 18 m for lorries with trailers. Vehicle weighbridges also differ depending on the type of the weighbridge used. Vehicle weighbridges use either analogue or digital strain gauges. Digital strain gauges in essence is an analogue gauge with a signal converter into a digital form which is built into the case of the strain gauge. Digital strain gauges simplify scale regulation and damage diagnostics. If weighing system uses digital strain gauges, it is possible to see the load and reading of each individual strain gauge in the indicator. The brand new 2015 Laumas Elekttronica – junction box allowing to convert the analogue signal into a digital one not in gauges but at the junction box of the scales. This system enables the use of analogue strain gauges which are cheaper and more durable against shock that the digital ones but offers the same service advantages that are offered by the digital strain gauges. Use of a digital signal from the platform to the indicator is mandatory, if the distance between the two exceed 100m. Metal platform truck scales also differ depending on the shape of the platform - there are full platform weighbridges and hollow middle weighbridges. Of course - durability of the platform - its deformation resistance is determined by both its construction - the proportion of metal as well as the quality of the metal used. Thus it is important to know the approximate daily load of the scales, when purchasing a truck scale. It may be from 2 to 5 vehicles daily up to a 1000 vehicles daily. At high loads, stronger platforms with higher metal volume must be selected. Metal platforms are subject to corrosion and thus platforms offered by manufacturers are often galvanised. Truck scales can be additionally equipped with external back-up displays and side railings for above-ground platform operation. Today, all scale indicators may be connected to a computer and so weighing computer software is very popular. There are software for scales that use an operator and software that is intended for automatic scales without an operator.2. Axle scales may be either stationary or mobile. Axle scales may weigh vehicles in a stationary mode (vehicle stops atop the axle scale platform) or the vehicle may be weighed while in motion (vehicle passes the axle weight without stopping). Truck scale - wikipedia. This type of scales enables determining the weight of the freight as well as to control whether the axle of the vehicle is not subject to excessive load. It is important that axle scales are placed on an even ground at least in the entire length of the vehicle. Mobile axle scales weigh each wheel individually - the precision is good if all wheels are located on the platform simultaneously. It means that in order to precisely weigh a three-axle vehicle, a total of six platforms are required.
For most of the mobile scales, verification is passed, if the entire vehicle is weighed at once. Regular mobile scales are equipped with a receipt printer which prints out the reading of each platform as well as the sum of all platforms i.e. the weight of the vehicle.