A road paver with a movable screed and with a layer thickness measuring device, which includes at least two sensors. The sensors are formed to carry out a distance measurement to the paving plane at intervals to determine a distance between the sensor and a point on the surface of the plane, said point being registered by the sensor. One of the two sensors defines a coordinate system. The layer thickness measuring device is formed to add as vectors the distance to the plane measured by the sensor that defines the coordinate system and a movement, relative to the plane and resulting from the driving of the road paver, of the coordinate system that is defined by the one sensor. In this way, a first vector can be determined which, together with a second vector, is used by the measuring device for determining the layer thickness of the laying material.

Road paver with layer thickness measuring device

The present invention relates to a method and a device for determining the spatial position of a sensor, in which a rough position information initially is determined by rough detection of the position of the sensor, and then the more accurate position of the sensor is obtained by measuring at least three reflectors mounted on the sensor with a laser tracker, wherein the search region of the laser of the laser tracker is limited for the reflectors with reference to the rough position information.

Method and device for determining the position of a sensor

Ein Strasenfertiger umfasst eine Bohle (16) zum Einbau einer Materialschicht (42) auf einem Untergrund (14) und eine Schichtdickenerfassungsvorrichtung zum Erfassen der Dicke (h B ) der eingebauten Materialschicht (42). A road finisher comprising a screed (16) for mounting a material layer (42) on a base (14) and a layer thickness detecting device for detecting the thickness (h B) of the built-material layer (42). Die Schichtdickenerfassungsvorrichtung umfasst einen ersten Sensor (38) zum Erfassen eines ersten Abstands zu der eingebauten Materialschicht (42) und einen zweiten Sensor (40) zum Erfassen eines zweiten Abstands zu dem Untergrund (14). The layer thickness detecting device comprises a first sensor (38) for detecting a first distance to the built-material layer (42) and a second sensor (40) for sensing a second distance to the ground (14). Die Schichtdickenerfassungsvorrichtung umfasst einen starren, an der Bohle (16) befestigten ersten Trager (36a) und einen an einem Zugarm (18), der die Bohle (16) dreht, befestigten zweiten Trager (36b). The layer thickness detecting device comprises a rigid, to the screed (16) secured to the first support (36a) and one at a pulling arm (18) which rotates the beam (16), fixed second carrier (36b). Der erste Sensor (38) ist an dem ersten Trager (36a) befestigt, und der zweite Sensor (40) ist an dem zweiten Trager (36b) befestigt. The first sensor (38) to the first support (36a) fixed, and the second sensor (40) to the second support (36b) fastened. Die Schichtdickenerfassungsvorrichtung umfasst eine Signalverarbeitungseinheit (44), die konfiguriert ist, um die Schichtdicke (h B ) der eingebauten Materialschicht (42) basierend auf den Sensorsignalen (s 1 , s 2 ) von dem ersten Sensor (38) und von dem zweiten Sensor (40), den Abstanden (a, b) des ersten Sensors (38) und des zweiten Sensors (40) von der Bohlenhinterkante (26), und den Anbringungshohen des ersten Sensors (38) und des zweiten Sensors (40) in Bezug zu der Bohlenhinterkante (26) zu erfassen. The layer thickness detecting device comprises a signal processing unit (44) that is configured to the layer thickness (h B) of the built-material layer (42) based on the sensor signals (s 1, s 2) from the first sensor (38) and from the second sensor ( 40), the distances (a, b) of the first sensor (38) and the second sensor (40) of the planks trailing edge (26), and the mounting heights of the first sensor (38) and the second sensor (40) with respect to the Bohlen trailing edge (26) to capture.

Road finisher with layer thickness detection device and method for detecting the thickness of an installed material layer

A measuring arm (12) is mounted to a frame body (5a) for supporting a screed (5). Height sensors (13 and 14) are mounted to the measuring arm (12), and another height sensor (19) is mounted to an arm (18) of the screed (5). Spaces between the tail end of the screed (5) and the height sensor (19), between the height sensor (19) and the height sensor (14) and between the height sensor (14) and the height sensor (13) are set constant. A traveling-distance-counting distance sensor is provided on the traveling vehicle. A height Ho of the both height sensors (13 and 14) relative to the screed (5) is kept constant at a given value irrespective of how much the screed (5) and the measuring arm (12) are inclined. The sensors (13, 14, and 17) are connected to an arithmetic unit (30), and the height sensor (19) to an arithmetic unit (40), respectively. The arithmetic unit (30) calculates a pavement thickness in response to signals output from the height sensors (13 and 14), and the arithmetic unit (40) detects unevenness of an unpaved surface in response to signals output from the height sensor (19), and controls the screed (5) so as to correct the unevenness. Operating conditions are set in the control device (30) by use of a recording medium such as an IC card.

Method of controlling pavement thickness in motor grader and method of setting conditions for automatic control

PROBLEM TO BE SOLVED: To provide a traveling body system capable of making a traveling body highly accurately perform autonomous traveling by using a distance sensor, and saving more space.SOLUTION: This traveling body system includes: a distance/direction detection device 7 which is mounted on a traveling body 1 and scans the rays of light for detection within a prescribed search range to detect a distance and direction between the traveling body and an object existing in the search range; map information storage means for storing map information of a traveling path including a position where a flat sign 20 is installed; and traveling direction determination means for determining the traveling direction of the traveling body by collating the detection result of the distance/direction detection device with the map information stored in the map information storage means. This traveling body system is configured by providing a diffuse reflection surface for performing the diffuse reflection of the rays of light for detection and a specular working surface for performing the specular reflection of the rays of light for detection on the flat sign 20.

Traveling body system

PURPOSE:To easily calculate the thicknesses of pavement of a road surface by measuring a first coordinate in a prescribed portion of a screed, and a second coordinate of a road surface before pavement at a place apart therefrom by a prescribed distance, so as to be subjected to arithmetic processing. CONSTITUTION:A first coordinate in a prescribed portion of a screed 3 in an absolute coordinate system is measured by a first measuring system. Next, a second coordinate of a road surface 5 before pavement in the absolute coordinate at a place apart from the prescribed portion by a prescribed distance is measured by a second measuring system. Then, on the basis of the measured results of the first and second measuring systems, the first and second coordinates are calculated by an arithmetic unit 14, and the values are displayed in time-series on a display unit 13. Thus, the measured results of the undulation of a road surface, the undulation of pavement, and the thicknesses of pavement can be simultaneously displayed, so that the determination of the amount of operation for maintaining the flatness of a pavement surface 6 can be easily carried out.

Pavement thickness detecting device

PROBLEM TO BE SOLVED: To provide a position measuring device for an unmanned carriage wherein only two reflectors, at minimum, are required for measuring position of an unmanned carriage. SOLUTION: At least two reflecting plates 12a and 12b which, whose positions are know, are allocated around a movement path, a laser sensor 11 which, mounted on a carriage 10, projects laser beam in horizontal direction to the reflecting plate and measures a relative angle of the carriage based on its reflected light, a measuring means which, mounted on the carriage, measures a travel distance along the advancing direction, and a measuring means which, counted on the carriage, measures the advancing direction as an orientation are provided. A position calculation part calculates absolute position and orientation of the carriage based an a setting position information of the reflecting plate, a relative angle to the reflecting plate viewed from the carriage at present and at a time which has passed a specified period, and a displacement amount in carriage position and that in orientation during a period from the time which has passed a specified period till present.

Hasumi Nobuyoshi

Papers

Pavement thickness detecting device

Position measuring device for mobile body