A system for assisting an asphalt compactor in performing a directional change can include a controller configured to perform a turn-out for the asphalt compactor by steering the asphalt compactor at a desired turning angle on an asphalt mat; the controller configured to turn off a vibratory system for the asphalt compactor during the turn-out; the controller configured to slow down and stop the asphalt compactor after a desired distance into the turn-out; and the controller configured to move the asphalt compactor in an opposite direction and restart the vibratory system.

The disclosure discloses a method and system for detecting road intelligent compaction index, so as to solve the problem of inaccurate use of a road intelligent compaction index due to the fact that existing harmonic ratio indexes do not consider the influence of a non-integral period on the accuracy and also do not consider a higher harmonic. According to the disclosure, a relative relationship between amplitudes of the higher harmonic and a fundamental wave in an acceleration time domain signal is considered based on the related art, the amplitude of the higher harmonic is introduced into a main body road intelligent compaction index of an road intelligent compaction index, and a precondition for the use of the road intelligent compaction index of the main body is established, that is, a machine-material decoupling control the machine-material decoupling control index.

The asphalt compactor may include a control system communicatively coupled to the one or more sensors including a grade sensor configured to determine a slope of the asphalt surface within the compacting area in at least the direction of travel of the asphalt compactor, the control system configured to: receive data indicative of the slope of the asphalt surface in at least the direction of travel of the asphalt compactor from the grade sensor, determine if the slope of the asphalt surface is one of an incline slope or a decline slope in the direction of travel, if the slope is determined to be the incline slope, determine if the incline slope exceeds a first threshold for the incline slope, and if the incline slope exceeds the first threshold for the incline slope, control a vibratory system to stop vibration of the trailing drum.

A vibratory compacting machine may include an engine, a main frame supporting the engine, and a compacting element mounted on the main frame and driven by the engine. The vibratory compacting machine may further include a vibratory system housed within the compacting element and configured to rotate about a rotation axis to vibrate the compacting element. The vibratory compacting machine may further include a control system configured to control a direction of rotation of the vibratory system. The control system may reverse the direction of rotation of the vibratory system when a predetermined number of pass counts is reached or when a predetermined density of the compactable material is reached.

A compaction control system for and methods of accurately determining properties of compacted and/or existing ground materials. 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.

The invention relates to a method of, and system for, obtaining an indication of the soil strength of soil over which a compactor roller travels. The method includes determining the depth to which a drum of the compactor roller penetrates into and depresses the soil when the compactor roller travels over a soil surface. The system includes a compactor roller, a measuring arrangement and a processor which is operatively connected to the measuring arrangement and which is configured to process data received from the measuring arrangement. The measuring arrangement includes an inertial measurement unit which is operatively connected to the compactor roller, wherein the arrangement is configured to obtain an indication of the soil strength of soil over which the compactor roller travels during operation, by determining the depth to which the drum penetrates into and depresses the soil over which it travels.

A system for automated dynamic compaction includes a compaction crane having a boom and compaction weight, at least one positional sensor, at least one boom deflection sensor, a rotational encoder, and a compaction control system. The compaction control system may be programmed to identify a first drop location having a first target parameter, determine whether the compaction crane is positioned over the first drop location, determine an initial elevation of the compaction weight, lift the compaction weight to a drop height, detect that the compaction weight has been released, re-hoist the compaction weight to the drop height, measure the payout length of a winch cable after each drop, determine a current elevation of the compaction weight after each drop, and determine whether the first target parameter has been satisfied.

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 method and system for detecting road intelligent compaction index, so as to solve the problem of inaccurate use of a road intelligent compaction index due to the fact that existing harmonic ratio indexes do not consider the influence of a non-integral period on the accuracy and also do not consider a higher harmonic. According to the disclosure, a relative relationship between amplitudes of the higher harmonic and a fundamental wave in an acceleration time domain signal is considered based on the related art, the amplitude of the higher harmonic is introduced into a main body road intelligent compaction index of an road intelligent compaction index, and a precondition for the use of the road intelligent compaction index of the main body is established, that is, a machine-material decoupling control the machine-material decoupling control index.

Disclosed is a thermal-based automatic roller tracking and mapping system for roller path tracking and mapping in pavement compaction. Accuracy in estimation during roller position tracking and mapping for pavement compaction through the use of thermal imaging is achieved. The tracking and mapping system utilizes an infrared camera for automatic roller path tracking and mapping in pavement construction. The tracking and mapping data associated with the movement of the roller vehicle during compaction of the surface can be generated and visually represented in a user interface accessible to the operator of the roller vehicle. Based on the tracking and mapping data that is generated in real-time and presented to the operator in the user interface, the operator can make adjustments to the roller vehicle and path, as necessary.