A system for controlling a vibratory effort on an asphalt mat includes a screed having a screed frame, a screed plate, and a vibratory mechanism. The screed plate and the vibratory mechanism are mounted on the screed frame and the vibratory mechanism is configured to vibrate the screed frame. The system further includes a sensor mounted on the screed frame, and configured to generate signals indicative of a vibrating parameter of the screed frame. The system further includes a controller in communication with the sensor and the vibratory mechanism. The controller is configured to receive the vibrating parameter, and further compare the vibrating parameter to a threshold parameter. The threshold parameter is the decoupling point of the screed frame. The controller is further configured to control the vibratory mechanism to reduce the vibrating parameter when the vibrating parameter exceeds the threshold parameter.

A system for compacting a work area is described. The system includes a compactor having a variable vibratory mechanism for providing a compaction effort to the work area. The system further includes a location sensor to generate a location data for the compactor. The system further includes a controller in communication with the location sensor and the variable vibratory mechanism. The controller is configured to determine a pass count for the work area based on the location data. The controller is further configured to determine a target compaction effort for the work area based on the pass count. The controller is further configured to modify the compaction effort to the target compaction effort.

A device for detecting the motion of a rotatable compactor roller about a compactor roller axis of rotation includes at least one motion sensor and an energy supply for the at least one motion sensor. The energy supply includes a generator having a stator and a rotor rotatable about a rotor axis of rotation with respect to the stator.

A method for paving a surface includes identifying the location of a first paving machine in a stringless paving train relative to a reference point and sending instructions to the first paving machine according to a road profile. The method further includes identifying the location of a second paving machine in a stringless paving train relative to the reference point and sending instructions to the second paving machine according to the road profile.

The present invention relates to a method of controlling operation of a vibratory roller comprising a roller drum and a vibratory mechanism. The method comprises determining a temperature of a surface to be compacted by the vibratory roller, determining a desired phase angle based on said determined temperature and maintaining the phase angle at, or close to, said desired phase angle by controlling the vibration frequency of the vibratory mechanism.

In some implementations, a management system may obtain, from a compactor machine, compaction data associated with a paving material mat laid by the paving machine. The management system may process the compaction data to determine one or more density values associated with the paving material mat. The management system may cause one or more actions to be performed based on the one or more density values.

A controller may obtain compaction data indicating one or more of a vibration amplitude or a vibration frequency used for a compaction drum of the compactor machine at a plurality of locations of the compactor machine on a paving material mat. The controller may determine, based at least in part on the compaction data, compaction energies produced by the compactor machine at the plurality of locations on the paving material mat. The controller may cause the compactor machine to perform a compacting operation at an area of the paving material mat based on the compaction energies.

A compactor machine may include a frame, a compaction member attached to the frame, and a controller attached to the frame. The controller may be configured to detect, while the compactor machine is traveling on a paving material mat to perform compacting, an event that is to cause the compactor machine to perform a stop. The controller may be configured to identify, based on detecting the event, a zone that the compactor machine is to use to perform the stop. The controller may be configured to cause the compactor machine to travel to the zone to perform the stop.

A test system and test method continuously and intelligently measures water content of subgrade in real time. The test system is based on the theory of resistivity, and is equipped with a wheeled machine to measure the water content of subgrade. The wheeled machine includes scroll roller. The test system includes: at least one set of electrode including four probes wherein detection parts of the four probes are linearly and equidistantly arranged on the scroll roller. The arrangement direction of the detection parts of the four probes is parallel to the axis of the scroll roller; a data integration apparatus is connected to the four probes and used for performing data calculation, analysis, and transmission; the electric source is connected to data integration apparatus and used for supplying a working current. The system and method can realize automatic signal collection, non-destructive detection of subgrade soil and dynamic water content measurement.

A method for providing information related to the compaction state of soil when performing a compaction operation with a soil compactor includes: a) detecting a vertical acceleration and a horizontal acceleration of a vibratory roller when moving a soil compactor over soil to be compacted, b) determining a measurement relationship between a ground contact force and a deflection of the vibratory roller for one vibration cycle using the vertical acceleration and horizontal acceleration detected in operation a), c) determining a simulation relationship between the ground contact force and the deflection for one vibration cycle using a ground model taking into account at least one simulation parameter, d) comparing the simulation relationship to the measurement relationship, and e) determining that a default value of the at least one simulation parameter taken into account in the ground model substantially represents a corresponding soil parameter of the soil to be compacted when the simulation relationship substantially corresponds to the measurement relationship.