TERRAMETER
The interaction of the acceleration of the vibrating drum and the stiffness of the soil are used in E-VIB. In general, soil stiffness will increase along side compaction. If the soil becomes stiffer, the drum acceleration will also increase. The measuring sensors record the acceleration. This data is used to determine the effective contact force between the soil and drum and, at the same time, the vibration path of the drum. If the contact force is then laid on top of the vibration path of the drum, this results in a loading and unloading curve for every revolution of the exciter. The E-VIB value corresponds with the increase in load curve, as this correlates with the stiffness of the soil. The measuring principle corresponds with the static plate test.
Only BOMAG uses two measuring sensors on the drum to optimise measuring accuracy. The measuring frequency is also unequalled: the E-VIB value is continuously measured with a measuring density of just 10 cm. This ensures that every weak spot is detected.
The TERRAMETER measuring system is available for all 5-series single drum rollers and is also standard on single drum rollers with VARIOCONTROL.
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