METHOD FOR PAVING A MULTI-LAYER ROAD SURFACE

Abstract

To pave a multi-layer road surface, a first pavement layer is paved along a roadway using a first road paver. A second pavement layer is paved over the first pavement layer using the first road paver or using a second road paver. Upon paving the first pavement layer, paving data is recorded that allows determining at least a progression track traveled during paving of the first pavement layer by a screed outer edge of the first road paver. The paving data is used to control the first road paver or the second road paver when the second pavement layer is paved.

Claims

1. A method for paving a multi-layer road surface, comprising: paving a first pavement layer along a roadway using a first road paver; and paving a second pavement layer over the first pavement layer using the first road paver or using a second road paver; wherein upon paving the first pavement layer, paving data is recorded that allows determining at least a progression track traveled during paving of the first pavement layer by a screed outer edge of the first road paver; and wherein the paving data is used to control the first road paver or the second road paver when the second pavement layer is paved.

2. The method according to claim 1, wherein the first road paver or the second road paver is controlled at least in part in an automated manner based on the paving data when the second pavement layer is paved.

3. The method according to claim 1, wherein the screed outer edge is a left screed outer edge of the first road paver, and wherein the paving data further allows determining a progression track traveled during paving of the first pavement layer by a right screed outer edge of the first road paver.

4. The method according to claim 1, wherein the paving data allows determining a progression track traveled during paving of the first pavement layer by a reference point that is stationary relative to a chassis of the first road paver.

5. The method according to claim 4, wherein the reference point comprises a theoretical turning point of the first road paver.

6. The method according to claim 1, wherein the paving data allows determining a progression through which an orientation of the first road paver went during paving of the first pavement layer.

7. The method according to claim 1, wherein the paving data allows determining a progression through which a lateral inclination angle of a screed of the first road paver went during paving of the first pavement layer.

8. The method according to claim 1, wherein recording the paving data comprises determining positions of at least two position measuring points in a stationary coordinate system, wherein the two position measuring points are provided in a stationary manner at a chassis of the first road paver.

9. The method according to claim 1, wherein steering of the first road paver or the second road paver is controlled based on the paving data when the second pavement layer is paved.

10. The method according to claim 1, wherein steering of the first road paver or the second road paver is controlled in an automated manner based on the paving data when the second pavement layer is paved.

11. The method according to claim 1, wherein a screed width setting of the first road paver or the second road paver is controlled based on the paving data when the second pavement layer is paved.

12. The method according to claim 1, wherein a screed width setting of the first road paver or the second road paver is controlled in an automated manner based on the paving data when the second pavement layer is paved.

13. The method according to claim 1, wherein a lateral inclination setting of a screed of the first road paver or the second road paver is controlled based on the paving data when the second pavement layer is paved.

14. The method according to claim 1, wherein a lateral inclination setting of a screed of the first road paver or the second road paver is controlled in an automated manner based on the paving data when the second pavement layer is paved.

15. The method according to claim 1, wherein the progression track traveled by the screed outer edge of the first road paver during paving of the first pavement layer is determined from the recorded paving data and is used, with or without prior processing, as a target track for the screed outer edge of the first road paver or a screed outer edge of the second road paver when the second pavement layer is paved.

16. The method according to claim 15, wherein the progression track is used with the prior processing, and the prior processing comprises smoothing and/or offsetting the progression track.

17. The method according to claim 1, wherein a progression track traveled by a reference point that is stationary relative to a chassis of the first road paver during paving of the first pavement layer is determined from the recorded paving data and is used, with or without prior processing, as a target track for the reference point of the first road paver or a reference point that is stationary relative to a chassis of the second road paver when the second pavement layer is paved.

18. The method according to claim 17, wherein the progression track traveled by the reference point is used with the prior processing, and the prior processing comprises smoothing and/or offsetting the progression track traveled by the reference point.

19. The method according to claim 1, wherein the progression track traveled by the screed outer edge of the first road paver during paving of the first pavement layer is determined from the recorded paving data and is displayed on a display.

20. The method according to claim 1, wherein a progression track traveled during paving of the first pavement layer by a reference point that is stationary relative to a chassis of the first road paver is determined from the recorded paving data and is displayed on a display.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The disclosure shall be further explained hereafter on the basis of embodiments with reference to the figures.

[0058] FIG. 1 shows a schematic perspective view of a road paver according to an embodiment.

[0059] FIG. 2 shows a schematic top view onto the road paver according to the embodiment.

[0060] FIG. 3 shows a schematic illustration of progression tracks recorded during paving of the first pavement layer.

[0061] FIG. 4 shows a schematic illustration of a display of the recorded progression tracks on a display after at least partial processing has been carried out.

[0062] FIG. 5 shows a schematic illustration a second pavement layer being paved on the first pavement layer.

DETAILED DESCRIPTION

[0063] FIG. 1 shows a schematic illustration of a road paver 1 according to an embodiment. Road paver 1 comprises a towing vehicle 3 and a screed 5 attached to towing vehicle 3. Screed 5 can be configured as a screed 5 for floating paving of a road surface. Road paver 1 comprises a control station 7 which provides space for an operator. A control panel 9 via which an operator can control functions of road paver 1 is provided at the control station 7. A display 11 is additionally provided at control station 7. Road paver 1 comprises a control device 13 for controlling machine components of road paver 1. Control device 13 is connected to control panel 9 for data communication.

[0064] In paving direction 15 at the front, road paver 1 comprises a material hopper 17 for receiving paving material. When a pavement layer is paved, paving material is conveyed backwards from material hopper 17 under control station 7 in a direction opposite to paving direction 15 and deposited forward of screed 5. Screed 5 smoothens and compacts the paving material. For this purpose, screed 5 can comprise, for example, smoothening plates and compacting devices. The compacting devices can comprise, for example, vibration elements or tamping elements.

[0065] FIG. 2 shows a schematic top view onto road paver 1. Two position measuring points 19 are provided on road paver 1, in particular at towing vehicle 3. Position measuring points 19 are provided in a stationary manner at a chassis of road paver 1. Position measuring points 19 each allow for an absolute position of position measuring point 19 to be determined in a stationary coordinate system. For example, position measuring points 19 can each comprise a Global Navigation Satellite System (GNSS) receiver, for example, a GPS receiver. A position of road paver 1 can be determined from measurement data which indicate the positions of position measuring points 19. For example, a position of a reference point 21 which is stationary in relation to road paver 1, in particular in relation to a chassis of road paver 1, can be determined. Stationary reference point 21 can be, for example, a theoretical turning point of road paver 1 or any other point of road paver 1. The position of reference point 21 can be determined taking into account the known relative positions between position measuring points 19 and reference point 21.

[0066] Since the position of position measuring points 19 relative to one another and relative to road paver 1, in particular relative to a chassis of road paver 1, is known, an orientation of road paver 1 in space can also be determined based on the determined positions of position measuring points 19. The orientation of road paver 1 can be specified, for example, in the form of an angle which, in a top view onto road paver 1, exists between current paving travel direction 15 and a certain cardinal direction, for example, a north-south direction.

[0067] Screed 5 of road paver 1 comprises a base screed 23 and extension members provided on both sides of base screed 23, in particular an extension member 25 on the left side as seen in paving direction 15 and an extension member 27 on the right side as seen in paving direction 15. Extension members 25, 27 can be extended and retracted laterally along a transverse direction 29 perpendicular to paving direction 15 in order to vary a paving width. The extension position of an extension member 25, 27 can be changed by way of actuators provided on screed 5. The extension positions of extension members 25, 27 can be adjustable continuously at least substantially.

[0068] A lateral inclination angle of screed 5 can be changed by way of one or more further actuators. The lateral inclination angle of screed 5 indicates an angle by which screed 5 is inclined along transverse direction 29 with respect to the horizontal plane when road paver 1 is positioned on a horizontal surface. By changing the lateral inclination angle of screed 5, a pavement layer having a lateral inclination can be paved.

[0069] In the embodiment shown, a screed position measuring point 35 is provided at a rear end of screed outer edges 31. Screed position measuring points 35 can each comprise, for example, a GNSS receiver, in particular a GPS receiver, which allows for direct measurement of an absolute position of respective screed position measuring point 35. Alternatively, the positions of the rear ends of screed outer edges 31, 33 could be determined, for example, by relating a current extension position of respective extension member 25, 27 of screed 5 to the determined positions of position measuring points 19 or to values derived therefrom. The current value of the extension position of an extension member 25, 27 of screed 5 can be determined, for example, from setting values for the extension position or determined using a screed width sensor.

[0070] The disclosure relates to paving a multi-layer road surface. First, a first pavement layer is paved along a roadway. At a later point in time, a second pavement layer is paved along the roadway over the first pavement layer. The second pavement layer can be paved directly on the first pavement layer or there can be one or more intermediate layers present between the first pavement layer and the second pavement layer.

[0071] The first pavement layer is paved using a first road paver 1 which can have the configuration shown in FIGS. 1 and 2. The second pavement layer can be paved using same road paver 1, i.e., likewise with first road paver 1. Alternatively, a different road paver 1, in particular a second road paver 1, can be used to pave the second pavement layer. Second road paver 1 can likewise have the configuration shown in FIGS. 1 and 2.

[0072] When paving the first pavement layer, road paver 1 is controlled manually at least in part. When paving the first pavement layer, for example, a steering of road paver 1, a screed width control of road paver 1 and a lateral inclination adjustment of screed 5 of road paver 1 can be controlled manually. The screed width control can comprise setting an extension position of left extension member 25 and setting an extension position of right extension member 27 of screed 5.

[0073] When the first pavement layer is paved, paving data is recorded by control device 13 of road paver 1. The paving data comprises a progression track 41 traveled by reference point 21 of road paver 1 or allow a progression track 41 traveled by reference point 21 of road paver 1 to be determined. The paving data comprises a progression track 43 traveled by left screed outer edge 31 of road paver 1 during paving of the first pavement layer or allow a progression track 43 traveled by left screed outer edge 31 of road paver 1 during paving of the first pavement layer to be determined. The paving data comprises a progression track 45 traveled by right screed outer edge 33 of road paver 1 during paving of the first pavement layer or allow a progression track 45 traveled by right screed outer edge 31 of road paver 1 during paving of the first pavement layer to be determined.

[0074] FIG. 3 shows progression tracks 41, 43, 45 in a schematic top view. As symbolized in FIG. 3 by the dashed illustration of progression tracks 41, 43, 45, progression tracks 41, 43, 45 can each be recorded and/or defined by recording discrete measuring points.

[0075] Progression track 41 of reference point 21 can be determined based on position determination of position measuring points 19. Progression tracks 43, 45 of screed outer edges 31, 33 can be determined based on position determination of screed position measuring points 35.

[0076] Progression tracks 41, 43, 45 can already be determined while the first pavement layer is being paved, in particular by control device 13, and saved as progression tracks 41, 43, 45. While the first pavement layer is being paved, only data which allows progression track 41, 43, 45 to be determined later can alternatively be stored, in particular stored by control device 13. The data can comprise position determination of position measuring points 19 and position determination of screed position measuring points 35.

[0077] Progression tracks 41, 43, 45 can be shown on display 11. FIG. 4 shows a schematic view of display 11 during the display of progression tracks 41, 43, 45. Progression tracks 41, 43, 45 can be shown on display 11 against the background of a map or against the background of an aerial photograph in order to facilitate associating progression tracks 41, 43, 45 with an actual surrounding. A current position of road paver 1 can be displayed together with progression tracks 41, 43, 45.

[0078] Progression tracks 41, 43, 45 recorded when the first pavement layer was paved, or the paving data recorded when the first pavement layer was paved, which allow progression tracks 41, 43, 45 to be determined, are used to control road paver 1 when the second pavement layer is paved. In particular, road paver 1 is controlled in an automated manner at least in part based on the recorded paving data when the second pavement layer is paved.

[0079] FIG. 5 shows road paver 1 when the second pavement layer is paved, where progression tracks 41, 43, 45 are also shown. A steering of road paver 1 for paving the second pavement layer is controlled based on the paving data such that reference point 21 of road paver 1 is moved along progression track 41. The extension positions of extension members 25, 27 of screed 5 of road paver 1 are controlled when the second pavement layer is paved such that screed position measuring points 35 follow progression tracks 43, 45.

[0080] The steering of road paver 1 and/or the extension positions of extension members 25, 27 can be controlled manually based on the paving data when the second pavement layer is paved. For this purpose, an operator can be shown a representation of progression tracks 41, 43, 45 together with a model of road paver 1 on display 11. Based on this display, the operator can control road paver 1 based on the paving data to pave the second pavement layer. In an embodiment automated at least in part, at least controlling the steering of road paver 1 and/or controlling the extension positions of extension members 27, 29 of screed 5 of road paver 1 is carried out in an automated manner by control device 13 of road paver 1 based on the paving data.

[0081] Before the paving data or progression tracks 41, 43, 45 defined by the paving data is/are used to control road paver 1 when the second pavement layer is paved, the paving data or the progression tracks 41, 43, 45 can be processed. Such processing can include smoothening progression tracks 41, 43, 45. Additionally or alternatively, processing can comprise shifting one or more of progression tracks 41, 43, 45. Processing can be carried out directly on road paver 1, in particular with the aid of control device 13 of road paver 1. The paving data or progression tracks 41, 43, 45 can be processed based on user input. For example, a user can define a smoothening algorithm to be used and/or define a desired shift of one or more of progression tracks 41, 43, 45.

[0082] Further data can be recorded when paving the first pavement layer and used, in particular, for the automated control of road paver 1, when the second pavement layer is paved. For example, a location-dependent course of a lateral inclination setting of screed 5 of road paver 1 can be recorded when the first pavement layer is paved. In particular, an associated value for the lateral inclination setting can be recorded for each measuring point of progression track 41 of reference point 21. When the second pavement layer is paved, control device 13 can control a lateral inclination setting of road paver 1 based on the paving data according to a course of the lateral inclination setting when the first pavement layer was paved.

[0083] As one skilled in the art would understand, the control panel 9, display 11, control device 13, measuring points 19, 35, as well as any other controller, unit, system, subsystem, interface, component, sensor (e.g., position sensor, screed width sensor, etc.), device, or the like described herein may individually, collectively, or in any combination comprise appropriate circuitry, such as one or more appropriately programmed processors (e.g. one or more microprocessors including central processing units (CPU)) and associated memory, which may include stored operating system software and/or application software executable by the processor(s) for controlling operation thereof and/or for performing the particular algorithms represented by the various functions and/or operations described herein, including interaction and/or cooperation between any such control panel, display, control device, measuring points, controller, unit, system, subsystem, interface, component, sensor, device, or the like. One or more of such processors, as well as other circuitry and/or hardware, may be included in a single ASIC (Application-Specific Integrated Circuitry), or several processors and various circuitry and/or hardware may be distributed among several separate components, whether individually packaged or assembled into a SoC (System-on-a-Chip).