A compactor for compacting a jobsite having a plurality of work areas has a frame, a compacting element coupled to the frame, and a control system. The control system receives a plurality of vibration measurements from a plurality of vibration sensors located at a plurality of measuring locations, determines a plurality of vibration distances where the plurality of vibration distances represent a distance and a direction for each vibration sensor to the compactor, and determines a projected compaction state for each of the plurality of work areas based on the plurality of vibration measurements and the plurality of vibration distances.

A compaction system includes a first frame; a second frame coupled to the first frame via an articulated joint; a first propulsion device operatively coupled to the first frame via a first propulsion motor, the first propulsion device being configured to propel the compaction system over a work surface in response to a power applied by the first propulsion motor; a compaction drum operatively coupled to the second frame, the compaction drum being configured to compact the work surface via rolling engagement with the work surface; a force sensor configured and arranged to generate a signal that is indicative of a propulsion force transmitted through the articulated joint; and a controller operatively coupled to the force sensor. The controller is configured to determine compaction performance of the compaction system against the work surface based at least in part on the signal from the force sensor.

A compactor for compacting a jobsite with a plurality of work areas includes a frame, a compacting element coupled to the frame and having a variable vibratory mechanism and providing a first compaction effort to a first work area on which the compactor is located and a control system. The control system determines a first compaction state for the first work area, determine a second compaction state for a second work area, receive a vibration measurement, determine a first vibration distance, and determine a second vibration distance. The control system also determines a second compaction effort for the second work area based on the first compaction state, the second compaction state, the vibration measurement, the first vibration distance, and the second vibration distance. The control system provides the second compaction effort to the second work area.

A compaction control system for and methods of accurately determining properties of compacted and/or existing ground materials is disclosed. The compaction control system includes a compaction machine that further includes a vibratory drum (or roller). The compaction machine is equipped with sensors to determine position and heading, vibration amplitudes at selected frequencies, and material type and moisture content information. Further, the compaction control system includes a controller and certain algorithms for processing the sensor information. Namely, a method is provided of using the sensor information to assess the improvement in compaction and then determine whether and/or when further ground improvement solutions are needed.

A compactor for compacting a jobsite with a plurality of work areas includes a frame, a compacting element coupled to the frame and having a variable vibratory mechanism and providing a first compaction effort to a first work area on which the compactor is located and a control system. The control system determines a first compaction state for the first work area, determine a second compaction state for a second work area, receive a vibration measurement, determine a first vibration distance, and determine a second vibration distance. The control system also determines a second compaction effort for the second work area based on the first compaction state, the second compaction state, the vibration measurement, the first vibration distance, and the second vibration distance. Finally, the control system provides the second compaction effort to the second work area.

A compactor for compacting a jobsite having a plurality of work areas has a frame, a compacting element coupled to the frame, and a control system. The control system receives a plurality of vibration measurements from a plurality of vibration sensors located at a plurality of measuring locations, determines a plurality of vibration distances where the plurality of vibration distances represent a distance and a direction for each vibration sensor to the compactor, and determines a projected compaction state for each of the plurality of work areas based on the plurality of vibration measurements and the plurality of vibration distances.

A method for determining the compaction state of a subgrade to be compacted using a roller compactor comprising at least one compactor drum having an oscillation-inducing arrangement and rotatable about a drum axis of rotation comprising the following steps: during at least one period of oscillating movement of the compactor drum, repeatedly determining the acceleration of the compactor drum in an first direction, representing a first acceleration value; in association with each first acceleration value, determining an acceleration of the compactor drum in a second direction representing a second acceleration value in order to provide acceleration value pairs, each consisting of a first acceleration value and a second associated acceleration value; and for at least one oscillation period, defining a compaction state value representing the compaction state of the subgrade based upon the period of oscillation determined for said acceleration value pairs.

A method to determine a slip state of the compactor roller of a soil compactor caused by an oscillation motion of a compactor roller, comprising the steps: a) Preparation of an acceleration quantity related to the oscillation motion of the compactor roller b) Based on the acceleration quantity, preparation of an acceleration frequency spectrum, c) Based on the acceleration frequency spectrum, determining the slip state of the compactor roller.

A compaction system and a method for determining decoupling of a roller from a work material are disclosed. The compaction system includes a roller configured to compact a work material through rolling engagement with the work material. The compaction system also includes a propulsion device configured to propel the roller along the work material, a power source operatively coupled to the propulsion device, a sensor configured to generate a signal that is indicative of a power potential from the power source, and a controller operatively coupled to the sensor. The controller is configured to receive the signal from the sensor, determine a first variance for a first time duration of the signal, determine a second variance for a second time duration of the signal, and determine the roller is decoupled from the work material based on at least one of the first variance and the second variance.

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.