For the first time in the history of compaction technology a vibratory roller has been developed for series production that determines the soil characteristics during the roller pass and adapts the compaction energy of the roller directly and fully automatically to suit soil demands. The manual selection of compaction parameters (frequencies or amplitudes) by the operator in the roller is no longer necessary. The automatic adaption of the variable exiter system ,,Bomag Vario in the ,,Variomatic model eliminates possible sources of error. In automatic operation the operator can fully concentrate on driving the roller. The vibration system is automatically adapted by the intelligent roller.The interaction between drum and ground is detected via an acceleration transducer on the drum body. The acceleration signal, a characteristic value for the soil contact force, is evaluated as a controlled variable. The phase position of one of the two exiter shafts is adjusted. The direction of vibration depends on alterations between the vertical amplitude (maximum introduction of energy) and the horizontal amplitude (minimum introduction of energy). Thus the maximum possible compaction energy can be provided for the soil. The result of maximum introduction of energy is a minimum number of passes. Overcompaction with danger of crushed grain can be avoided. Simple handling, due to soil recognition, avoids problems caused by faulty operation. The Bomag Variomatic System - the operator drives, the roller thinks. Reporting test results and experiences from applications in soil and asphalt constructions in various European countries in (A)
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