Abstract: A manual control device for a control and operating unit of a lifting work platform, work machine or construction machine has at least one actuating unit which has an actuation element having at least one magnetic position element, and an evaluating unit having at least one magnetic field sensor unit. The evaluating unit is configured to detect a position and/or movement of the actuation element in a plane of movement based on a sensor signal from the magnetic field sensor unit. The actuation element is movable relative to the sensor unit along a further direction of movement perpendicularly to the plane of movement, wherein the evaluating unit is configured to detect a movement of the actuation element along the further direction of movement based on a sensor signal from the magnetic field sensor unit.

Abstract: A wearable computer is used for monitoring process data in road finishing. The wearable computer receives process data of the road finishing process. In the event of process data lying outside a predetermined range, the wearable computer effects alerting of the wearer of the wearable computer.

Abstract: A road paver includes a screed for applying a material layer to a foundation and a layer thickness detecting device for detecting the thickness of the applied material layer. The layer thickness detecting device includes a first sensor for detecting a first distance from the applied material layer and a second sensor for detecting a second distance from the foundation. The layer thickness detecting device is securely attached to the screed.

Abstract: A device for determining the temperature of a road building material applied by a construction machine in a placement width includes an infrared temperature measuring head, a motor and a controller. The infrared temperature measuring head is arranged to be twistable by the motor in a manner transverse to the direction of travel of the construction machine so as to scan the surface of the road building material to capture temperature measuring values of the surface of road building material during a rotational movement at a plurality of measuring points spaced apart from one another. The controller is configured to set a scanning speed as a function of a position of the measuring point.

Abstract: A temperature measuring device includes a temperature sensor, arranged within a holder, for determining the temperature of a building material located within a skip of a transport vehicle, the skip including an inner wall and an outer wall, and the holder being arranged on that side of the inner skip wall that faces the outer skip wall. The holder is arranged within a recess within the inner skip wall such that it is thermally insulated from the inner skip wall. The holder is arranged within the recess such that a region, which faces the interior of the skip, of the holder is exposed.

Abstract: A road paver includes a screed for applying a material layer to a foundation and a layer thickness detecting device for detecting the thickness of the applied material layer. The layer thickness detecting device includes a first sensor for detecting a first distance from the applied material layer and a second sensor for detecting a second distance from the foundation. The layer thickness detecting device is securely attached to the screed.

Abstract: An electrical circuit includes an SG full bridge circuit, a first resistor series connection connected between the terminals of an energy supply gate of the SG full bridge circuit and having a first tap between two resistors, and a second resistor series connection connected between the terminals of a signal gate of the SG full bridge circuit and having a second tap between two resistors.

Abstract: A road paver includes a screed for applying a material layer to a foundation and a layer thickness detecting device for detecting the thickness of the applied material layer. The layer thickness detecting device includes a first sensor for detecting a first distance from the applied material layer and a second sensor for detecting a second distance from the foundation. The layer thickness detecting device is securely attached to the screed.

Abstract: A device for determining an extension length of an extendable machine part includes a first ultrasound sensor and a controller, the controller determining the extension length on the basis of an ultrasound signal received by the first ultrasound sensor. The first ultrasound sensor includes a first ultrasound converter and a second ultrasound converter which are arranged such that they are offset along the measuring direction.

Abstract: A device for determining the position of a road roller relative to a road finisher has a transceiver on the road roller for transmitting transmit signals and for receiving receive signals from at least two reference points on the road finisher spaced apart from each other. An evaluation unit determines the position of the road roller relative to the road finisher from the run time between transmitting the transmit signals and receiving the receive signals from the reference points.

Abstract: A device for detecting the temperature of an asphalt material to be processed by a road finishing machine includes at least one temperature measuring head, the at least one temperature measuring head being integrated into an ultrasonic sensor for detecting the filling level of the asphalt material.

Abstract: An apparatus for determining an elevation of a working tool relative to a reference plane, includes a rotary laser system, a radio unit and a detector. The rotary laser system emits a rotating laser beam in a plane inclined relative to the reference plane. The radio unit is configured to measure a distance between the working tool and the rotary laser system and the detector is mounted on the working tool for detecting the laser beam. The elevation of the working tool can be determined on a basis of the inclination angle and the distance between the working tool and the rotary laser system.