DYWA Weighbridge
DYWA, Weighbridge with calibration facility
The DYWA is a dynamic vehicle scale from Kistler Instrumente AG, which has been developed by DIGISENS. The scale, which is let into the road surface, measures at walking speed. In contrast to the classic weighbridge, which only measures vehicle gross weight, the DYWA determines axle weights which are added together to give the gross weight. The measurement electronics are designed to automatically detect whether the vehicle has traversed the scale correctly.
Measuring system
As well as the low space requirement, the outstanding features of the DYWA are short measuring time, automatic weighing and low cost compared with classic weighbridges.
The system consists of a beam balance with vibrating-wire load cells (monoblock) and a measuring computer. The extremely robust design is further distinguished by the fact that it absorbs all forces (including torsion and Y and Z-direction forces), but only transmits the forces acting vertically on the sensors.
The following extras are available as an option:
- Traffic lights for controlling the weighing process
- Digital display for gross weight
- Printer
- Semi-automatic identification via chip card and card reader
- Fully automatic identification via transponder
Measuring process
If a semi-automatic or fully automatic vehicle identification system has been installed, the axle scale is started when the vehicle has been registered. The vehicle drives over the scale at constant/uniform speed at walking pace. When the vehicle has crossed the scale, the gross weight (gross axle loads) is shown on a display and transmitted to a computer for further processing. When a customer-definable waiting time has expired, the next vehicle can cross the axle scale.
If a vehicle with the same identification crosses the scale again within a certain time, the difference between the two weights (net weight) is automatically calculated, displayed and stored, so that the weight of the load (added or removed) can be determined. An advantage here is that the vehicle can cross the scale in either direction.
Technical data
- Maximum load: 45t, higher weights are also possible depending on the country
- Maximum load per axle: 12t
- Minimum load per axle: 100kg
- Display increment: 10kg
- Overload: 150%
- Accuracy: Calibration OIML up to Class 0.2
- Multi-range scale (up to 5t d=10kg, up to 10t d=20kg, up to 30t d=50kg)
- Permissible traversal speed: 0.5 m/s - 1.2 m/s
- Temperature range (operating): -10°C to 40°C
- Max. permissible ambient temperature: -30°C to 60°C
- Weighing computer: Keyboard, display, 3 serial interfaces, 8 digital inputs and outputs
- Scale dimensions: 2900 x 800 x 250 mm
(Technical data are subject to change without notice)
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