A road finishing machine comprises a screed for producing a paving layer on a subsoil on which the road finishing machine is movable in a laying direction, wherein the screed has a pulling arm fixed to the road finishing machine at a front pulling point by a levelling cylinder; at least one measuring means for performing a distance measurement, a storage means, and a controlling system. The controlling system is embodied to calculate a correction value in response to at least one distance measurement performed with respect to the subsoil and/or to a reference, which is performable at a measuring point in front of a front edge of the screed, to at least temporarily store the correction value in the storage means and calculate a desired levelling value for the measuring point taking into consideration the stored correction value, based on which the levelling cylinder of the screed is controllable.

A steering mechanism and guidance system for a milling attachment device provides steering capability without impeding cutting depth control. The steering mechanism has at least one wheel that is rotated by an actuating mechanism such as an extending cylinder, synchronized actuators, or the like. The steering mechanism may be integrated with depth control by using a parallelogrammic structure with pivot points to assist in the depth control or may operate independent of and without impeding depth control.

A sensor system for a construction machine, in particular a road finishing machine, includes a laser scanner and an evaluation unit. The laser scanner can be arranged on the construction machine or the road finishing machine itself and is configured to search a specified angular range for objects and to determine angles of the specified angular range according to distance values describing the distance to the one or several objects together with corresponding intensity values describing an intensity of a reflection resulting at the one or several objects. The evaluation unit is configured to detect an object as a reference together with corresponding angles based on a known pattern including the distance values and the intensity values across the angles. Further, the evaluation unit is configured to determine a distance to the reference and/or an angle with respect to the reference.

A concrete screeding device for screeding uncured concrete placed at a support surface includes a screed head having a floating platform, a grade setting device and a vibrating member. The screed head is configured to be positioned at a start of a screeding pass and placed at a surface of placed uncured concrete. A screed moving device is operable to pull the screed head along the surface of the placed uncured concrete. While the screed head is pulled along the surface of the placed uncured concrete and fully supported at the surface of the placed uncured concrete, the floating platform floats on the surface of the placed uncured concrete and the grade setting device adjusts relative to the floating platform to establish a graded surface of the placed uncured concrete at which the vibrating member will move over and along.

In the method for transferring material between a truck and a driving road construction vehicle, a distance between the driving road construction vehicle and a truck driving in front of the road construction vehicle without contact to the road construction vehicle truck is kept constant by a distance control system. While the distance between the driving road construction vehicle and the truck is kept constant, material is being dumped from a loading cavity of the truck into a material hopper of the road construction vehicle. The road construction vehicle is a road finishing machine or a feeder for a road finishing machine.

In a self-propelled construction machine (1), in particular road milling machine or surface miner, for working a ground pavement, comprising a milling drum (10), which is mounted in a machine frame, wherein a milling cut develops during milling of the ground pavement with the milling drum (10), wherein the milling drum (10) comprises a first and a second end side, at least a first measuring device, which is arranged next to the first end side of the milling drum (10) and measures the distance of the machine frame relative to the ground pavement next to the first end side of the milling drum (10), at least a second measuring device, which is arranged next to the second end side of the milling drum (10) and measures the distance of the machine frame relative to the ground pavement next to the second end side of the milling drum (10), and a control device (40) for controlling the milling depth, wherein, in a first milling operation, the control device (40) determines the milling depth by means of measurements performed by the first and the second measuring device, it is provided for the following features to be achieved: a second milling operation is detectable by means of the control device (40), in which the milling drum (10) is positioned on an as yet non-milled milling cut that is arranged next to a previously milled milling cut, wherein the control device (40), as soon as the second milling operation is detected, uses measurements performed by at least a third measuring device in lieu of the first and/or the second measuring device for determining the milling depth.

A soil compactor machine can include a machine frame; at least one cylindrical roller drum rotatably coupled to the machine frame and rotatable about a drum axis oriented generally transverse to a direction of travel of the compactor machine; and a radar sensor mounted to a front portion of the machine frame and positioned forward of the roller drum, wherein the radar sensor is mounted to the machine frame by a sensor bracket configured to directly mount to the machine frame for both a blade and a non-blade soil compactor machine configuration.

A machine for removing formwork from underneath a cured concrete slab includes a wheeled base movable on and supported at a support structure, a raisable-and-lowerable structure disposed on the wheeled base, and a formwork-removal device attached to the raisable-and-lowerable structure. The formwork-removal device includes an arm extending from the raisable-and-lowerable structure, at least one wedge element disposed at a distal end of the arm, and a formwork-retaining mechanism. With the raisable-and-lowerable structure adjusted to raise the wedge element and the wedge element moved to engage the formwork and an underside of a concrete slab, the wedge element is further moved to apply a force separating part of the formwork from the concrete slab, the formwork-retaining mechanism is operated to grasp the formwork separated from the concrete slab, retaining the formwork. With the formwork grasped by the formwork-retaining mechanism, the raisable-and-lowerable structure is lowered, removing the formwork from the concrete slab.

A system for distributing a material over a surface includes a sensor configured to transmit a sonic signal from a position on the system to a surface of a quantity of the material. The system also includes a device to project an image onto the surface of the quantity of the material. The device is adjustable in relation to the sensor to cause the image to have a specified shape when the sonic signal impacts the surface of the quantity of the material at a specified angle, and a different shape when the sonic signal impacts the surface of the quantity of the material at different angle.

A method for determining an elevation of a laser detector assembly includes calculating an estimated elevation of a laser detector assembly based on data from an inertial measurement unit and a detected laser strike. The estimated elevation is then output. A detected elevation of the laser detector assembly is calculated based on the detected laser strike and the detected elevation is output in response to the detected laser strike. The estimated elevation is calculated and output between outputs of detected elevations.