Paving method for multi-layered road surface

Abstract

To provide an improved method for paving multi-layered road surfaces.SOLUTION: To pave a multi-layered road surface, a first pavement layer is paved along the road using a first road paving machine 1. A second pavement layer is paved on top of the first pavement layer using the first road paving machine 1 or using a second road paving machine 1. During the paving of the first pavement layer, paving data are recorded which at least make it possible to determine travel trajectories 43, 45 traveled by the outer screed edges 31, 33 of the first road paving machine 1 during the paving of the first pavement layer. The paving data are used for controlling the first road paving machine 1 or the second road paving machine 1 when the second pavement layer is paved.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to the field of road construction by road pavers, in particular the paving of multi-layered surfaces along roads. [Background technology]

[0002] A method for the automatic control of a road paver is disclosed in EP 1 118 713 B1. A measuring point is stationarily attached to the screed of the road paver. The measuring point can be arranged, for example, at the end of an extendable screed member of the screed. A target value for the position of the measuring point is determined by means of planning data. A position deviation between the actual position of the measuring point and the target position is calculated. The screed is adjusted based on the calculated position deviation.

[0003] The system disclosed in EP 1 118 713 B1 can only be used if suitable planning data is available.

[0004] German Patent Application 10 2020 117 095 A1 describes a road paving control unit capable of generating a boundary map of the pavement based on the positions of a first screed extension and a second screed extension. In some cases, the boundary map can be generated as a two-dimensional or three-dimensional digital model of the pavement or paved work surface.

[0005] In practice it is known to pave a multi-layer road surface by making several passes of a road paver along the road, where the road paver is manually steered by a driver each time and the screed width of the road paver is manually adjusted by at least one screed operator. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to provide an improved method for paving multi-layer road surfaces. [Means for solving the problem]

[0007] According to one aspect of the invention, there is provided a method of paving a multi-layer road surface. A first pavement layer is paved along a road using a first road paver. A second pavement layer is paved on top of the first pavement layer using the first road paver or using a second road paver. Pavement data is recorded as the first pavement layer is paved. The pavement data makes it possible to determine at least a travel trajectory traveled by an outer screed edge of the first road paver during paving of the first pavement layer. The pavement data is used to control the first road paver or the second road paver as the second pavement layer is paved.

[0008] Recording pavement data as a first layer of pavement is paved provides information that can facilitate the paving of a second layer of pavement. The pavement data can be utilized as a by-product of the paving process of the first layer of pavement. Separate steps for obtaining the pavement data as part of the planning process can be omitted or simplified.

[0009] By using the pavement data when the second pavement layer is paved, the second pavement layer can be paved to match the first pavement layer particularly well. By paving the second pavement layer to match the first pavement layer, a high quality pavement can be achieved.

[0010] A travel trajectory of the outer screed edge of the first road paver when paving the first pavement layer may represent a path of the lateral outer boundary of the first pavement layer. The paving data may facilitate accurate placement of the second pavement layer relative to the first pavement layer. The paving data may facilitate the paving process of the second pavement layer with a travel trajectory that corresponds as closely as possible to the travel trajectory of the first pavement layer.

[0011] The trajectory along which the screed outer edge of the first road paver has moved can be the trajectory of a point on the screed outer edge or a point on the screed outer edge. Preferably, the trajectory along which the screed outer edge of the first road paver has moved is the trajectory of a trailing edge or trailing point of the screed outer edge. The trajectory of the trailing edge or trailing point of the screed outer edge can represent the trajectory of a lateral outer boundary of the first pavement layer.

[0012] When paving the first paving layer, the first road paver can be partially or completely manually controlled by one or more operators. For example, the extension members of the screed of the first road paver, in particular the extension members of the left extension member and the right extension member, can be manually controlled when paving the first paving layer. Additionally or alternatively, for example, the steering of the first road paver can be manually controlled when paving the first paving layer. Additionally or alternatively, for example, the setting of the lateral inclination angle of the screed of the first road paver can be manually controlled when paving the first paving layer.

[0013] The first road paver or the second road paver can be at least partially manually controlled based on the paving data as the second paving layer is paved. For example, an operator of the first road paver or the second road paver can be provided with setting recommendations based on the paving data as the second paving layer is paved. Paving of the second paving layer can be simplified by the setting recommendations.

[0014] The first road paver or the second road paver can be at least partially automatically controlled based on the paving data as the second paving layer is paved. Operation of the first road paver or the second road paver can be simplified by the at least partially automatic control as the second paving layer is paved.

[0015] The first road paver may include a first controller. The first controller may be configured to control one or more functions of the first road paver. The second road paver may include a second controller. The second controller may be configured to control one or more functions of the second road paver.

[0016] The paving data may be recorded as the first paving layer is paved. The paving data may be recorded by the first road paver. The paving data may be recorded by the first control device. The paving data may be stored in a data storage device. The data storage device may be provided as part of the first road paver. The data storage device may be connected to the first road paver by data communication. The data storage device may be configured as, for example, a cloud storage device. The data storage device may be configured as a portable data medium connectable to the first road paver. The portable data medium may be configured as, for example, a floppy disk, or as a CD, or as a USB memory stick, or as a hard disk, or as an SSD, or as a flash memory device. The data storage device may be part of an external electronic device, in particular a smart device. The external electronic device may comprise an operation system and a user interface. The external electronic device may be a handheld device. The external electronic device may comprise a display, in particular a touch screen. The external electronic device may be configured as, for example, a PC, or as a notebook PC, or as a tablet PC, or as a smart phone. The external electronic device may be connected for data communication with the first road paver. The external electronic device may be connected to the first road paver via a wireless data connection and / or may be registered with the first road paver. An application for saving or loading pavement data may be installed on the external electronic device. The application may be configured to edit the pavement data.

[0017] The first controller can at least partially automatically control the first road paver based on the paving data when the second paving layer is paved. The second controller can at least partially automatically control the second road paver based on the paving data when the second paving layer is paved. If the second paving layer is paved with the second road paver, the paving data can be transferred to the second road paver before the second paving layer is paved, or the second controller can retrieve the paving data from a storage device provided external to the second road paver, in particular from a cloud storage. The second road paver retrieving the paving data can include transferring, in particular copying, the paving data to the second road paver or the second road paver accessing the paving data. For example, the second road paver, in particular the second controller, can copy the paving data from the cloud storage. The paving data can be processed in particular in the cloud and then retrieved from the cloud by the second road paver. In particular, the pavement data can be transferred from the data storage device to the second road paver or the second control device can retrieve the pavement data from the data storage device, which can in particular be configured as a cloud storage. The pavement data can be retrieved by the second road paver after the first pavement layer has been completely paved. The pavement data can have already been retrieved by the second road paver when the second pavement layer is being paved. In particular, the second road paver can retrieve the pavement data continuously or periodically or at least several times while the first pavement layer is being paved.

[0018] The second road paver, or at least functions of the second road paver, can be remotely controlled via the cloud based on the paving data.

[0019] The fact that the paving data makes it possible to determine certain information, such as the travel trajectory traveled by the outer screed edge of the first road paver during the paving of the first paving layer, may imply that the corresponding information is directly included in the paving data.

[0020] The fact that the paving data allows certain information to be determined, such as the travel trajectory of the screed edge of the first road paver moving during paving of the first paving layer, may imply that the corresponding information is determinable from the paving data alone.

[0021] The fact that the paving data makes it possible to determine certain information, such as the travel trajectory along which the outer screed edge of the first road paver has moved during the paving of the first paving layer, may include that the corresponding information is determinable from the paving data taking into account one or more known additional information, which may for example comprise machine data of the first road paver, in particular the dimensions of the first road paver.

[0022] The paving data may enable measurement of a travel path traveled by a left screed outer edge of the first road paver during paving of the first paving layer. Alternatively, or in addition, the paving data may enable measurement of a travel path traveled by a right screed outer edge of the first road paver during paving of the first paving layer. The travel path traveled by each screed outer edge may be expressed in a stationary coordinate system.

[0023] The travel path of the screed edge during the paving of the first pavement layer can at least substantially correspond to the path of the lateral boundaries of the first pavement layer to be paved. Using the travel path of the screed edge during the paving of the first pavement layer, the paving of the second pavement layer with a precise position and a precise width can be simplified.

[0024] The pavement data may determine a trajectory of a reference point stationary relative to a chassis of the first road paver during paving of the first layer of pavement. The reference point may be, for example, a theoretical turning point of the first road paver. The trajectory of the reference point traveled may represent a travel path of the first road paver during paving of the first layer of pavement.

[0025] The described travel trajectory, in particular the travel trajectory of the screed edge stationary relative to the chassis of the first road paver or the travel trajectory of the reference point, can be a travel trajectory formed by discrete points or a continuous travel trajectory, which can for example comprise at least one data point per meter of the first pavement layer to be paved.

[0026] The paving data can determine the progression of the attitude of the first road paver moving during the paving of the first paving layer. The attitude of the first road paver can be specified, for example, as an angle between the current road paver paving movement direction and a certain direction, for example, a north-south direction. The progression of the attitude of the first road paver can be a position-dependent path. The paving data can specify, for example, for each data point of the position of a reference point that is stationary relative to the chassis of the first road paver, a value that defines the corresponding attitude of the first road paver. For example, at least one data point can be recorded for the attitude of the first road paver per meter of the first paving layer that is paved.

[0027] The paving data may enable the progression of the lateral inclination angle of the screed of the first road paver moving during paving of the first paving layer to be determined. The lateral inclination of the screed may be the inclination along a transverse direction intersecting the paving movement direction. The lateral inclination angle may be an angle relative to a horizontal plane. For example, an area to the left of the screed relative to the paving movement direction may be positioned higher or lower than an area to the right of the screed relative to the paving movement direction. The lateral inclination of the screed may be used to pave an inclined road surface, for example a curve. For example, at least one data point may be recorded for the lateral inclination angle per meter of the first paving layer paved.

[0028] Recording the pavement data may include determining and / or recording positions of the at least two position measurement points in a stationary coordinate system. The at least two position measurement points may be two position measurement points or three or more position measurement points. The at least two position measurement points may be stationarily provided on a chassis of the first road paver. The at least two position measurement points may be stationarily provided at known positions on a chassis of the first road paver. The positions of the at least two position measurement points may be determined and / or recorded in pairs. The positions of the at least two position measurement points may be determined and / or recorded periodically as the first pavement layer is paved.

[0029] From a data pair recorded at a specific time, which comprises the positions of the two position measurement points at this specific time, it is possible to determine in which position a reference point stationary relative to the chassis of the first road paver, in particular a theoretical pivot point of the first road paver, is assumed at this specific time, in particular when taking into account the known geometrical conditions of the first road paver. Based on this data pair, in particular taking into account the known geometrical conditions of the first road paver, it is additionally or alternatively possible to determine the attitude of the first road paver at this specific time.

[0030] The recording of paving data may include determining the position of the left screed outer edge of the first road paver and / or the position of the right screed outer edge of the first road paver. The position of the respective screed outer edge may be the position of a point on the screed outer edge, in particular the position of the rear end or rear end point of the screed outer edge. The position of the respective screed outer edge may be determined directly by a position sensor, such as a GPS sensor, provided on the screed outer edge. The position of the respective screed outer edge may be determined based on the extended position of the extension member of the screed of the first road paver provided on the respective side. The extended position of the respective extension member may be determined based on an associated extended position sensor, such as a distance sensor attached to the screed, or based on a set value for the respective screed extended position present in the first control device. The position of the respective screed outer edge of the first road paver may be determined from the extended position, in particular in combination with the positions of two position measuring points provided stationarily on the chassis of the first road paver.

[0031] The second pavement layer can be paved by the first road paver, i.e. the same road paver that paved the first pavement layer. Alternatively, the second pavement layer can be paved by a second road paver. The second road paver can be a different road paver than the first road paver. If the second pavement layer is paved by a second road paver, the pavement data can be transferred to the second road paver with or without processing. The pavement data can be transferred to the second road paver directly or indirectly, for example by a storage medium or by a data connection. The pavement data can be transferred to the second road paver, for example wirelessly.

[0032] The second layer of pavement can be paved after paving of the first layer of pavement is completed. The second layer of pavement is paved after a paving run of the first road paver to pave the first layer of pavement is completed.

[0033] If the second pavement layer is paved by a second road paver, the second pavement layer can be optionally at least partially paved at the same time as the first pavement layer is paved. The second road paver can run behind the first road paver paving the first pavement layer and pave the second pavement layer. The distance between the first road paver and the second road paver in the paving travel direction can be, for example, less than 100 m, or less than 50 m, or less than 25 m, or less than 15 m, or less than 10 m during the joint paving run. While paving the second pavement layer, the second road paver can continuously or periodically, in particular directly or indirectly, receive paving data from the first road paver running in front of the second road paver. The second road paver can process the paving data while paving the second pavement layer.

[0034] The first road paver may comprise a towing vehicle and a screed attached to the towing vehicle. The towing vehicle may comprise a chassis. The screed may be configured as a screed for floating paving of the road surface. In the paving direction forward, the first road paver may comprise a material hopper for receiving the paving material. When paving the paving layer, the paving material may be conveyed backwards from the material hopper in a direction opposite to the paving travel direction and deposited in front of the screed. The screed may smooth and compact the paving material.

[0035] The screed of the first road paver may comprise a base screed and extension members on both sides of the base screed, in particular a left extension member in the paving direction and a right extension member in the paving direction. The extension members are extendable laterally along a transverse direction perpendicular to the paving direction in order to vary the paving width. The extension positions of the extension members are changeable by means of actuators provided on the screed. The extension positions of the extension members are at least substantially infinitely adjustable. The extension members are capable of softening limit plates defining the screed outer edge on each side.

[0036] The second road paver may comprise a towing vehicle and a screed attached to the towing vehicle. The towing vehicle may comprise a chassis. The screed may be configured as a screed for floating paving of the road surface. In the forward paving travel direction, the second road paver may comprise a material hopper for receiving the paving material. When paving the paving layer, the paving material may be conveyed backwards from the material hopper in a direction opposite to the paving travel direction and deposited in front of the screed. The screed may smooth and compact the paving material.

[0037] The screed of the second road paver may comprise a base screed and extension members on both sides of the base screed, in particular a left extension member in the paving direction and a right extension member in the paving direction. The extension members are extendable laterally along a transverse direction perpendicular to the paving direction in order to vary the paving width. The extension positions of the extension members are changeable by means of actuators provided on the screed. The extension positions of the extension members are at least substantially infinitely adjustable. The extension members may each be provided with a limit plate defining an outer screed edge on the respective side.

[0038] The steering of the first road paver or the second road paver when the second paving layer is paved can be controlled, in particular automatically controlled, based on the paving data. The steering of the first road paver or the second road paver when the second paving layer is paved can be controlled based on one or more of the following: a travel path along which the screed outer edge of the first road paver moves during the paving of the first paving layer; a travel path along which the left screed outer edge of the first road paver moves during the paving of the first paving layer; a travel path along which the right screed outer edge of the first road paver moves during the paving of the first paving layer; a travel path along which a reference point that is stationary relative to the chassis of the first road paver moves during the paving of the first paving layer; a travel path along which a theoretical pivot point of the first road paver moves during the paving of the first paving layer; a path of the attitude of the first road paver during the paving of the first paving layer.

[0039] Based on the paving data, the steering of the first road paver or the second road paver can be controlled such that as the second pavement layer is paved, the second road paver moves at least substantially the trajectory moved by the first road paver during paving of the first pavement layer.

[0040] When the second pavement layer is paved, the first road paver or the second road paver can be controlled based on the paving data to pave the second pavement layer in the same travel direction as the first pavement layer was paved by the first road paver. When the second pavement layer is paved, the first road paver or the second road paver can be controlled based on the paving data to pave the second pavement layer in a paving travel direction opposite to the paving travel direction in which the first pavement layer was paved by the first road paver. Paving in the opposite direction can have the advantage that the road paver does not have to return to the starting point to pave the second pavement layer. An operator can select in which paving travel direction to pave the second pavement layer (corresponding or opposite to the paving travel direction in which the first pavement layer was paved). An operator can select the paving travel direction by operator input. The paving movement direction can be determined automatically, particularly by a control device of the road paver paving the second pavement layer, prior to starting paving of the second pavement layer, based on the positioning and / or attitude of the road paver paving the second pavement layer.

[0041] The first road paver can be controlled based on the paving data to move over the paved first pavement layer to a start point of the paving process of the first pavement layer and in particular to move back automatically.

[0042] When the second paving layer is paved, a screed width setting of the first road paver or the second road paver can be controlled, in particular automatically controlled, based on the paving data. The screed width setting can include an extension position of a left extension member of the screed of the first road paver or the second road paver and / or an extension position of a right extension member of the screed of the first road paver or the second road paver. When the second paving layer is paved, the first road paver or the second road paver can be controlled based on the paving data such that an outer screed edge of the first road paver or the second road paver at least substantially follows a path of an outer screed edge of the first road paver when paving the first paving layer. When the second paving layer is paved, the first road paver or the second road paver can be controlled based on the paving data such that the screed edge of the first road paver or the second road paver runs within a boundary that is offset inwardly relative to one another compared to the path of the screed edge of the first road paver when paving the first paving layer. The second paving layer can be paved at least somewhat narrower than the first paving layer. Paving the second paving layer narrowly can ensure that the second paving layer is fully supported by the first paving layer.

[0043] The path travelled by the screed outer edge of the second road paver can be the path of a point on the screed outer edge or a point on the screed outer edge. Preferably, the path travelled by the screed outer edge of the second road paver is the path of a trailing edge or trailing point of the screed outer edge. The path of the trailing edge or trailing point of the screed outer edge can represent the path of the lateral outer boundary of the second pavement layer.

[0044] When the second paving layer is paved, the lateral inclination setting of the screed of the first road paver or the second road paver can be controlled, in particular automatically controlled, based on the paving data. When the second paving layer is paved, the lateral inclination setting of the screed of the first road paver or the second road paver can be controlled, in particular automatically, based on the paving data, such that the position-dependent path of the lateral inclination setting corresponds to the position-dependent path of the fill setting during the paving of the first paving layer.

[0045] From the recorded paving data, at least one travel trajectory along which the screed outer edge of the first road paver has moved during the paving of the first paving layer can be determined and used, with or without pre-processing, as a target trajectory for the screed outer edge of the first road paver or the second road paver when the second paving layer is paved. Pre-processing can include smoothing and / or shifting the determined travel trajectory of the screed outer edge of the first road paver.

[0046] From the recorded paving data, in particular the travel trajectory traveled by the left screed edge of the first road paver during the paving of the first paving layer, can be determined and used, with or without pre-processing, as a target trajectory for the screed outer edge of the first road paver or the second road paver when the second paving layer is paved. From the paving record data, in particular the travel trajectory traveled by the right screed outer edge of the first road paver during the paving of the first paving layer, can be determined and used, with or without pre-processing, as a target trajectory for the screed outer edge of the first road paver or the second road paver when the second paving layer is paved.

[0047] For example, the treatment may involve shifting the trajectory of the screed outer edge or shifting the trajectories of both screed outer edges to each other trajectory, in this way it is possible to reduce the paving width of the second paving layer, in particular to ensure that the second paving layer is adequately supported by the first paving layer.

[0048] From the recorded paving data, a travel trajectory of a reference point stationary with respect to the chassis of the first road paver, in particular a theoretical pivot point of the first road paver, moved during the paving of the first pavement layer, can be determined and used as a target trajectory for a reference point stationary with respect to the chassis of the first road paver or the second road paver, with or without pre-processing, when the second pavement layer is paved. Pre-processing can include smoothing and / or shifting of the determined travel trajectory.

[0049] Shifting the travel trajectory, in particular the travel trajectory of the screed outer edge or the travel trajectory of a reference point stationary relative to the chassis of the first road paver, can comprise the travel trajectory being shifted as a whole by a certain vector in a quasi-rigid manner, or shifting the travel trajectory, in particular the travel trajectory of the screed outer edge or the travel trajectory of a reference point stationary relative to the chassis of the first road paver, can comprise shifting each point of the travel trajectory perpendicular to the original curve profile, such that when the curve trajectory is shifted the radius also changes.

[0050] Shifting the travel trajectory can include shifting the entire travel trajectory, or shifting only one or more sub-regions of the travel trajectory, or shifting different regions of the travel trajectory differently.

[0051] Data reduction, i.e. reduction of data points or support points of the travel trajectory, can be carried out before smoothing of the travel trajectory, in particular before smoothing of the travel trajectory of the outer edge of the screed or before smoothing of the travel trajectory of a reference point that is stationary relative to the chassis of the first road paver.

[0052] From the recorded paving data at least one travel trajectory along which the screed outer edge of the first road paver has moved during the paving of the first paving layer can be determined and displayed on the display. In particular, from the recorded paving data a travel trajectory along which the left screed outer edge of the first road paver has moved during the paving of the first paving layer and a travel trajectory along which the right screed outer edge of the first road paver has moved during the paving of the first paving layer can be determined and displayed on the display.

[0053] From the recorded paving data, the progression trajectory along which a reference point stationary relative to the chassis of the first road paver, in particular the theoretical pivot point of the first road paver, moved during the paving of the first pavement layer can be determined and shown on the display.

[0054] The track shown on the display can be shown together with a map or together with an aerial photograph.

[0055] The display may be present on or attached to the first road paver or the second road paver or an external device.

[0056] The invention is explained further below on the basis of embodiments with reference to the drawings. [Brief description of the drawings]

[0057] [Figure 1] FIG. 1 shows a schematic perspective view of a road paver according to one embodiment. [Diagram 2] FIG. 2 shows a schematic top view of a road paver according to an embodiment. [Diagram 3] FIG. 3 shows a schematic diagram of the progress trajectory recorded during the paving of the first pavement layer. [Figure 4] FIG. 4 shows a schematic representation of the recorded travel trajectory on a display after at least partial processing has been performed. [Diagram 5] FIG. 5 shows a schematic diagram of a second pavement layer being paved over a first pavement layer. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0058] Figure 1 shows a schematic diagram of a road paver 1 according to an embodiment. The road paver 1 comprises a towing vehicle 3 and a screed 5 attached to the towing vehicle 3. The screed 5 can be configured as a screed 5 for floating paving of road surfaces. The road paver 1 comprises a control station 7 providing space for an operator. A control panel 9 is provided in the control station 7, by means of which the operator can control the functions of the road paver 1. Furthermore, a display 11 is provided in the control station 7. The road paver 1 comprises a control device 13 for controlling the machine elements of the road paver 1. The control device 13 is connected to the control panel 9 for data communication.

[0059] In the paving direction 15 forward, the road paver 1 comprises a material hopper 17 for receiving the paving material. When a paving layer is paved, the paving material is conveyed backwards from the material hopper 17 under the control station 7 in the direction opposite to the paving direction 15 and deposited in front of the screed 5. The screed 5 smoothes and compacts the paving material. For this purpose, the screed 5 can be equipped, for example, with a smoothing plate and a compaction device. The compaction device can comprise, for example, a vibration element or a tamping element.

[0060] FIG. 2 shows a schematic top view of the road paver 1. Two position measurement points 19 are provided on the road paver 1, in particular on the towing vehicle 3. The position measurement points 19 are provided stationary on the chassis of the road paver 1. Each of the position measurement points 19 allows the determination of the absolute position of the position measurement point 19 in a stationary coordinate system. For example, each of the position measurement points 19 can be equipped with a GNSS receiver, for example a GPS receiver. The position of the road paver 1 can be determined from measurement data indicating the position of the position measurement points 19. For example, it is possible to determine the position of a reference point 21, which is stationary with respect to the road paver 1, in particular with respect to the chassis of the road paver 1. The stationary reference point 21 can be, for example, a theoretical pivot point of the road paver 1 or any other point of the road paver 1. The position of the reference point 21 can be determined taking into account the known relative positions between the position measurement points 19 and the reference point 21.

[0061] Since the positions of the position measurement points 19 relative to one another and relative to the road paver 1, in particular relative to the chassis of the road paver 1, are known, the orientation of the road paver 1 in space can also be determined based on the determined positions of the position measurement points 19. The orientation of the road paver 1 can for example be determined in the form of an angle existing between the current paving movement direction 15 and a certain cardinal direction, for example the north-south direction, in a top view of the road paver 1.

[0062] The screed 5 of the road paver 1 comprises a base screed 23 and extension members provided on both sides of the base screed 23, in particular an extension member 25 on the left side as seen in the paving direction 15 and an extension member 27 on the right side as seen in the paving direction 15. The extension members 25, 27 are extendable laterally along a transverse direction 29 perpendicular to the paving direction 15 in order to vary the paving width. The extension positions of the extension members 25, 27 can be changed by actuators provided on the screed 5. The extension positions of the extension members 25, 27 are at least substantially continuously adjustable.

[0063] The lateral inclination angle of the screed 5 can be varied by one or more further actuators. The lateral inclination angle of the screed 5 indicates the angle at which the screed 5 is inclined along the transverse direction 29 relative to the horizontal plane when the road paver 1 is positioned on a horizontal surface. By varying the lateral inclination angle of the screed 5 it is possible to pave a paving layer with a lateral inclination.

[0064] In the embodiment shown, the screed position measuring points 35 are provided at the rear end of the screed outer edge 31. The screed position measuring points 35 can each be equipped with, for example, a GNSS receiver, in particular a GPS receiver, allowing direct measurement of the absolute position of the respective screed position measuring point 35. Alternatively, the position of the rear end of the screed outer edge 31, 33 can be determined, for example, by correlating the current extended position of the respective extension member 25, 27 of the screed 5 with the measured position of the position measuring point 19 or a value derived therefrom. The current value of the extended position of the extension member 25, 27 of the screed 5 can be determined, for example, from a set value for the extended position or can be determined by means of a screed width sensor.

[0065] The present invention relates to a multi-layer road surface pavement. First, a first pavement layer is paved along a road. At a later time, a second pavement layer is paved on top of the first pavement layer along the road. The second pavement layer can be paved directly on top of the first pavement layer, or there can be one or more intermediate layers between the first and second pavement layers.

[0066] The first pavement layer is paved using a first road paver 1, which may have the configuration shown in Figures 1 and 2. The second pavement layer may be paved using the same road paver 1, i.e. also with the first road paver 1. Alternatively, it is possible to pave the second pavement layer using a different road paver 1, in particular a second road paver 1. The second road paver 1 may also have the configuration shown in Figures 1 and 2.

[0067] When paving the first pavement layer, the road paver 1 is at least partly manually controlled. When paving the first pavement layer, e.g. when steering the road paver 1, the screed width control of the road paver 1 and the lateral inclination adjustment of the screed 5 of the road paver 1 can be manually controlled. The screed width control can include setting the extension position of the left extension member 25 and setting the extension position of the right extension member 27 of the screed 5.

[0068] When the first paving layer is paved, paving data is recorded by the control device 13 of the road paver 1. The paving data comprises a travel path 41 along which the reference point 21 of the road paver 1 has moved, or makes it possible to determine the travel path 41 along which the reference point 21 of the road paver 1 has moved. The paving data comprises a travel path 43 along which the left screed outer edge 31 of the road paver 1 has moved during the paving of the first paving layer, or makes it possible to determine the travel path 43 along which the left screed outer edge 31 of the road paver 1 has moved during the paving of the first paving layer. The paving data comprises a travel path 45 along which the right screed outer edge 33 of the road paver 1 has moved during the paving of the first paving layer, or makes it possible to determine the travel path 45 along which the right screed outer edge 31 of the road paver 1 has moved during the paving of the first paving layer.

[0069] Figure 3 shows in a schematic top view the travel trajectories 41, 43, 45. As the travel trajectories 41, 43, 45 are shown as dashed lines in Figure 3, each of the travel trajectories 41, 43, 45 can be recorded and / or defined by recording discrete measurement points.

[0070] The progression trajectory 41 of the reference point 21 is determinable on the basis of the position determination of the position measuring points 19. The progression trajectories 43, 45 of the screed edges 31, 33 are determinable on the basis of the position determination of the screed position measuring points 35.

[0071] The travel trajectories 41, 43, 45 can be easily determined, in particular by the control device 13, while the first pavement layer is being paved and are stored as travel trajectories 41, 43, 45. It is instead possible to store, in particular by the control device 13, only data which allows the travel trajectories 41, 43, 45 to be determined at a later time while the first pavement layer is being paved. The data can include a position determination of the position measuring points 19 and a position determination of the screed position measuring points 35.

[0072] The travel trajectories 41, 43, 45 can be displayed on the display 11. Figure 4 shows a schematic view of the display 11 during the display of the travel trajectories 41, 43, 45. To make it easier to relate the travel trajectories 41, 43, 45 to the actual surroundings, the travel trajectories 41, 43, 45 can be displayed on the display 11 against a map background or against an aerial photograph background. The current position of the road paver 1 can be displayed together with the travel trajectory 41, 43, 45.

[0073] The travel trajectory 41, 43, 45 recorded while paving the first pavement layer, or paving data recorded while paving the first pavement layer from which the travel trajectory 41, 43, 45 can be determined, is used to control the road paver 1 when the second pavement layer is paved. In particular, the road paver 1 is at least partly automatically controlled based on the recorded paving data when the second pavement layer is paved.

[0074] Figure 5 shows the road paver 1 when the second pavement layer is being paved, where also the travel trajectories 41, 43, 45 are shown. The steering of the road paver 1 for paving the second pavement layer is controlled based on the paving data such that the reference point 21 of the road paver 1 moves along the travel trajectory 41. The extension positions of the extension members 25, 27 of the screed 5 of the road paver 1 are controlled such that the screed position measurement point 35 follows the travel trajectory 43, 45 as the second pavement layer is being paved.

[0075] The steering of the road paver 1 and / or the extension positions of the extension members 25, 27 can be manually controlled based on the paving data when the second paving layer is paved. For this purpose, the operator can be provided with a representation of the travel trajectory 41, 43, 45 together with a model of the road paver 1 on the display 11. Based on this representation, the operator can control the road paver 1 based on the paving data in order to pave the second paving layer. In an at least partially automated embodiment, the control of at least the steering of the road paver 1 and / or the control of the extension positions of the extension members 27, 29 of the screed 5 of the road paver 1 is performed automatically by the control device 13 of the road paver 1 based on the paving data.

[0076] Before the paving data or the travel trajectory 41, 43, 45 defined by the paving data are used to control the road paver 1 when the second paving layer is paved, the paving data or the travel trajectory 41, 43, 45 can be processed. Such processing can include smoothing of the travel trajectory 41, 43, 45. Additionally or alternatively, the processing can include one or more shifts of the travel trajectory 41, 43, 45. The processing can be performed directly on the road paver 1, in particular with the aid of the control device 13 of the road paver 1. The paving data or the travel trajectory 41, 43, 45 can be processed based on user input. For example, the user can define the smoothing algorithm to be used and / or can define one or more desired shifts of the travel trajectory 41, 43, 45.

[0077] Further data can be recorded when paving the first pavement layer and used in particular for the automatic control of the road paver 1 when the second pavement layer is paved. For example, the position-dependent path of the lateral inclination setting of the screed 5 of the road paver 1 can be recorded when the first pavement layer is paved. In particular, the relevant value of the lateral inclination setting can be recorded for each measuring point of the travel trajectory 41 of the reference points 21. When the second pavement layer is paved, the control device 13 can control the lateral inclination setting of the road paver 1 based on the paving data and according to the path of the lateral inclination setting when the first pavement layer was being paved.

Claims

1. paving a first pavement layer along a road using a first road paver (1); and paving a second pavement layer on top of the first pavement layer using the first road paver (1) or using a second road paver (1); A method for paving a multi-layer road surface comprising: during paving of the first paving layer, paving data are recorded which make it possible to determine at least a progression path (43, 45) travelled by an outer screed edge (31, 33) of the first road paver (1) during paving of the first paving layer; A paving method, wherein the paving data is used to control the first road paver (1) or the second road paver (1) when a second paving layer is paved.

2. 2. The method of claim 1, wherein the first road paver (1) or the second road paver (1) is at least partially automatically controlled based on the paving data when the second paving layer is paved.

3. 3. The method according to claim 1 or 2, wherein the paving data makes it possible to determine a progression trajectory (43) traveled by a left screed outer edge (31) of the first road paver (1) during the paving of the first paving layer and a progression trajectory (45) traveled by a right screed outer edge (33) of the first road paver (1) during the paving of the first paving layer.

4. The method according to any one of claims 1 to 3, wherein the pavement data makes it possible to determine a progression trajectory (41) along which a reference point (21) stationary with respect to a chassis of the first road paver (1), in particular a theoretical pivot point of the first road paver (1), has moved during the paving of the first pavement layer.

5. The method according to any one of claims 1 to 4, wherein the paving data makes it possible to determine the progress made in the attitude of the first road paver (1) during the paving of the first pavement layer.

6. The method according to any one of claims 1 to 5, wherein the paving data makes it possible to determine the progress made by a lateral inclination angle of a screed (5) of the first road paver (1) during paving of the first pavement layer.

7. 7. The method according to claim 1, wherein the recording of the pavement data comprises determining the positions of at least two position measurement points (19) in a stationary coordinate system, the two position measurement points (19) being stationarily provided on a chassis of the first road paver (1).

8. 8. The method according to any one of claims 1 to 7, wherein the steering of the first road paver (1) or the second road paver (1) is controlled, in particular automatically, based on the paving data when a second paving layer is paved.

9. 9. The method according to any one of claims 1 to 8, wherein a screed width setting of the first road paver (1) or the second road paver (1) is controlled, in particular automatically, based on the paving data when a second paving layer is paved.

10. 10. The method according to any one of claims 1 to 9, wherein the lateral inclination setting of the screed (5) of the first road paver (1) or of the second road paver (1) is controlled, in particular automatically, based on the paving data when a second paving layer is paved.

11. 11. The method according to any one of claims 1 to 10, wherein at least one progress trajectory (43, 45) travelled by the screed edge (31, 33) of the first road paver (1) during the paving of the first pavement layer is determined from the recorded paving data and is used, with or without pre-processing, as a target trajectory for the screed edge (31, 33) of the first road paver (1) or the second road paver (1) when a second pavement layer is paved.

12. 12. The method according to claim 1, wherein a progression trajectory (41) along which a reference point (21) stationary with respect to a chassis of the first road paver (1), in particular a theoretical pivot point of the first road paver (1), has moved during the paving of the first pavement layer, is determined from the recorded paving data and used, with or without pre-processing, as a target trajectory for a reference point (21) stationary with respect to a chassis of the first road paver (1) or the second road paver (1) when a second pavement layer is paved.

13. The method according to claim 11 or 12, wherein pre-processing comprises smoothing and / or offsetting the determined progression trajectory (41, 43, 45).

14. The method according to any one of the preceding claims, wherein at least one progression trajectory travelled by an outer screed edge (31, 33) of the first road paver (1) during paving of the first pavement layer is determined from the recorded paving data and displayed on a display (11).

15. The method according to any one of claims 1 to 14, wherein a progression trajectory (41) along which a reference point (21) stationary with respect to a chassis of the first road paver (1), in particular a theoretical pivot point of the first road paver (1), has moved during the paving of the first pavement layer, is determined from the recorded paving data and displayed on a display (11).

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