A device is provided for monitoring the compaction of concrete introduced into a slipform of a slipform paver by means of at least one concrete compacting device that has an asynchronous motor for driving an unbalanced mass which generates vibrations. The monitoring device comprises an apparatus for monitoring the stator current of the asynchronous motor, the apparatus being configured such that a change in the compaction of the concrete is determined based on an analysis of the stator current. The apparatus for monitoring the stator current of the asynchronous motor is preferably configured such that the amplitude spectrum of the stator current is determined in order to analyse the stator current. It is advantageous that the compaction of the concrete is not monitored using sensors which are exposed to harsh ambient conditions during operation of the slipform paver.

The present invention relates to a method for controlling a road milling machine comprising a milling drum and a rear blade when there is an obstacle located in the ground to be milled, comprising the following steps: a) Milling the ground at a predetermined milling depth (FT) along a working direction (a); b) Advancing the road milling machine in the working direction (a) towards the obstacle located in the ground; c) Raising the milling drum and the rear blade out of the ground in the working direction (a) in front of the obstacle; d) Moving over the obstacle in such a way that the milling drum remains out of contact with the obstacle; e) Lowering the milling drum and the rear blade to the predetermined milling depth (FT) in the working direction (a) behind the obstacle and continuing the milling of the ground, wherein the road milling machine is controlled in such a way that in step c) the raising of the milling drum is carried out before the raising of the rear blade out of the ground, wherein the road milling machine continues to move in the working direction (a) between the raising of the milling drum and the raising of the rear blade. The present invention also relates to a road milling machine for performing the method.

The present invention relates to a method for controlling a road milling machine comprising a milling drum and a rear blade when there is an obstacle located in the ground to be milled, comprising the following steps: a) Milling the ground at a predetermined milling depth (FT) along a working direction (a); b) Advancing the road milling machine in the working direction (a) towards the obstacle located in the ground; c) Raising the milling drum and the rear blade out of the ground in the working direction (a) in front of the obstacle; d) Moving over the obstacle in such a way that the milling drum remains out of contact with the obstacle; e) Lowering the milling drum and the rear blade to the predetermined milling depth (FT) in the working direction (a) behind the obstacle and continuing the milling of the ground, wherein the road milling machine is controlled in such a way that in step c) the raising of the milling drum is carried out before the raising of the rear blade out of the ground, wherein the road milling machine continues to move in the working direction (a) between the raising of the milling drum and the raising of the rear blade. The present invention also relates to a road milling machine for performing the method.

When the measurement values measured by a first sensor among a plurality of sensors installed in a dispersed manner at a specific location, in first cycles are determined to be abnormal values, a control device activates the first sensor in second cycles that are shorter than the first cycles. Moreover, when the abnormal values are included in the trend of temporal variation, the control device activates a plurality of second sensors, which is installed around the first sensor, in the second cycles. Moreover, when the measurement values measured by the first sensor and the plurality of second sensors in the second cycles are included in the trend of surface-direction distribution, the control device outputs the measurement values measured by the first sensor and the plurality of second sensors.

When the measurement values measured by a first sensor among a plurality of sensors installed in a dispersed manner at a specific location, in first cycles are determined to be abnormal values, a control device activates the first sensor in second cycles that are shorter than the first cycles. Moreover, when the abnormal values are included in the trend of temporal variation, the control device activates a plurality of second sensors, which is installed around the first sensor, in the second cycles. Moreover, when the measurement values measured by the first sensor and the plurality of second sensors in the second cycles are included in the trend of surface-direction distribution, the control device outputs the measurement values measured by the first sensor and the plurality of second sensors.

A system, apparatus, and method can control one or more screed extensions or extenders of a paving machine. Such control can include identifying a location of an undesirable surface condition of a mat paved on a base by the paving machine using data from one or more sensors associated with a screed extension; characterizing the undesirable surface condition of the mat; and adjusting a height and/or an angle of attack of an extension plate of the screed extension to prevent future occurrences of the undesirable surface condition responsive to the identification and characterization of the undesirable surface condition. The location of the undesirable surface condition can represent a start of the undesirable surface condition in a transverse direction of the paving machine and can be associated with either an interface between the screed extension and a main screed or outward of the interface, along a length of the extension plate of the screed extension.

A system, apparatus, and method can control one or more screed extensions or extenders of a paving machine. Such control can include identifying a location of an undesirable surface condition of a mat paved on a base by the paving machine using data from one or more sensors associated with a screed extension; characterizing the undesirable surface condition of the mat; and adjusting a height and/or an angle of attack of an extension plate of the screed extension to prevent future occurrences of the undesirable surface condition responsive to the identification and characterization of the undesirable surface condition. The location of the undesirable surface condition can represent a start of the undesirable surface condition in a transverse direction of the paving machine and can be associated with either an interface between the screed extension and a main screed or outward of the interface, along a length of the extension plate of the screed extension.

A method for determining and monitoring output of a milling machine comprises sensing an operating parameter of a milling machine with a sensor, transmitting data from the sensor of the milling machine to an off-board location, determining a performance parameter of the milling machine from the data at the off-board location, transmitting the performance parameter to the milling machine, and displaying the performance parameter on a display screen of the milling machine.

A method for determining and monitoring output of a milling machine comprises sensing an operating parameter of a milling machine with a sensor, transmitting data from the sensor of the milling machine to an off-board location, determining a performance parameter of the milling machine from the data at the off-board location, transmitting the performance parameter to the milling machine, and displaying the performance parameter on a display screen of the milling machine.

An apparatus and a method for rolling weight deflection measurement comprising a rolling wheel to be moved along a measuring surface in a first direction. The apparatus comprises a number of spaced apart range sensors arranged on at least one carrier and configured to measure a distance to said measuring surface at pavement locations passed by the apparatus. A first of said range sensors is arranged at a predetermined location with respect to said rolling wheel, and the remainder of the range sensors are arranged in spaced apart manner in line with said first range sensor in the in first direction. At least one inclination sensor is configured to measure at least a change in inclination of said at least one carrier, a curvature parameter value for said measuring surface is calculated using measurements from said range sensors and said inclination sensor.