Abstract: The invention relates to a measuring system for a construction machine having a carrier including several portions, a measuring system for a construction machine including a calculation unit determining a regression line as well as a controller having two control loops.

Abstract: Apparatus for controlling the cutting depth of a road grooving machine by vertical adjustment of both the front and rear travelling gear on the basis of a cutting depth control signal, which is generated by a tracer ski by sampling a reference plane, including at least three ultrasonic sensors arranged one behind the other in the direction of movement of the cutter, and an evaluation means for determining the distances between the ultrasonic sensors and a reference plane to derive therefrom an inclination signal as well as an averaged distance signal. The evaluation means controls the height of the two travelling gears such that the average distance of the cutter drum as well as the position of the machine relative to the reference plane are adjusted.

Abstract: An ultrasonic sensor control unit for a road finishing machine for generating a height control signal for a vertically adjustable beam, the ultrasonic sensor control unit including at least three ultrasonic sensors which are arranged at a considerable distance from the beam in the direction of motion of the road finishing machine. The ultrasonic sensor signals determine the distances between each ultrasonic sensor and a reference surface, the values which lie more than a predetermined distance outside of a plane which is determined by the measuring points associated with the other distances being rejected as faulty measurement. On the basis of the height signals, the mutual distances of the sensors, and the distance between a sensor and the rear edge of the beam, the evaluation means calculates the projected height at the rear edge of the beam. This height is compared with a selectable desired thickness value.

Abstract: A control sensor for a construction machine serves for generating height control signals for the height control of a tool of the construction machine along a guide cable and contains at least two supersonic sensors, one of which at least serves as a transmitter/receiver element, whereby the supersonic sensors are connected to an evaluation means and arranged in a right angle to the construction machine's direction of movement and in such a distance to the guide cable that the detection angle of the supersonic cones will lead, at this distance, to their overlapping.

Abstract: A height control device for a fixture which comprises at least a pair of gauging devices each having an ultrasonic transceiver for gauging a certain distance. A signal generator is connected to both gauging devices for generating a signal representative of the change in the level height due to machining. A control device is also provided for elevating or lowering the machining fixture.