Method for installing a multi-layer road surface

Abstract

To install a multi-layer pavement, a first layer is laid along a straight section using a first paver (1). A second layer is then laid over the first layer using either the first paver (1) or a second paver (1). During the installation of the first layer, paving data is recorded, which at least allows for the determination of a track (43, 45) traversed by the outer edge (31, 33) of the screed of the first paver (1) during the installation of the first layer. This paving data is used to control the first paver (1) or the second paver (1) during the installation of the second layer.

Description

[0001] The invention relates to the field of road construction using a road paver. In particular, the invention relates to the installation of a multi-layered road surface along a route.

[0002] From EP 1 118 713 B1, a method for the automatic control of a road paver is known. A measuring point is permanently attached to a paving screed of the road paver. The measuring point can, for example, be located at the end of an extension section of the paving screed. Based on planning data, target values ​​for the position of the measuring point are determined. A positional deviation between the actual position of the measuring point and a target position is calculated. Based on the calculated positional deviation, the paving screed is adjusted.

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

[0004] German patent DE 10 2020 117 095 A1 describes a road construction control unit that can generate a boundary map of a pavement based on the positions of a first screed widening and a second screed widening. In some cases, the boundary map can be generated as a two-dimensional digital model or a three-dimensional digital model of the pavement or the constructed work area.

[0005] EP 0 834 620 A1 describes a paving train for laying a bituminous surface in two layers, consisting of two road pavers which are guided along a reference driving line with predetermined intermediate distances via distance sensors.

[0006] It is known in practice to install a multi-layer road surface by repeatedly driving over a route with a road paver, whereby 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.

[0007] It is an object of the invention to provide an improved method for installing a multi-layered road surface.

[0008] According to one aspect of the invention, a method for installing a multi-layer road surface is provided. A first asphalt paver is used to install a first layer along a road alignment. A second layer is then installed over the first layer, either using the first asphalt paver or a second asphalt paver. During the installation of the first layer, installation data is recorded. This data allows, at least, the determination of the path traversed by the outer edge of a screed of the first asphalt paver during the installation of the first layer. This installation data is then used to control the first asphalt paver or the second asphalt paver during the installation of the second layer.

[0009] Recording the installation data during the installation of the first pavement layer provides information that can facilitate the installation of the second layer. This installation data can be obtained, in a sense, as a byproduct of the first layer's installation. A separate step for acquiring this data during the planning phase can be eliminated or simplified.

[0010] By using the installation data when installing the second pavement layer, the second layer can be installed in a particularly well-coordinated manner with the first. Installing the second layer in a way that is coordinated with the first layer results in a high level of road surface quality.

[0011] The track traversed by the outer edge of the screed of the first paver during the installation of the first layer of asphalt can represent the lateral boundary of that layer. This installation data can facilitate the correct positioning of the second layer of asphalt relative to the first. Furthermore, it can facilitate the installation of the second layer of asphalt with a path that closely matches the path of the first layer.

[0012] The track traversed by the outer edge of the screed of the first paver can be a track of a point on the outer edge of the screed or a point on the outer edge of the screed. Preferably, the track traversed by the outer edge of the screed of the first paver is a track of a rear end or a rear endpoint of the outer edge of the screed. The path of a rear end or a rear endpoint of the outer edge of the screed can represent a lateral outer boundary of the first pavement layer.

[0013] During the installation of the first asphalt layer, the first paver can be partially or fully manually controlled by one or more operators. For example, the extension positions of the screed sections, particularly the left and right sections, can be manually controlled during the installation of the first asphalt layer. Additionally or alternatively, the steering of the first paver can also be manually controlled during the installation of the first asphalt layer. Additionally or alternatively, the cross slope angle of the screed can also be manually controlled during the installation of the first asphalt layer.

[0014] The first or second paver can be at least partially manually controlled during the installation of the second pavement layer, based on the installation data. For example, setting recommendations can be displayed to the operator of the first or second paver during the installation of the second pavement layer, based on the installation data. These setting recommendations can simplify the installation of the second pavement layer.

[0015] The first or second paver can be at least partially automatically controlled during the installation of the second asphalt layer, based on the installation data. This at least partially automatic control can simplify the operation of the first or second paver during the installation of the second asphalt layer.

[0016] The first asphalt paver can include a first control unit. The first control unit can be configured to control one or more functions of the first asphalt paver. The second asphalt paver can include a second control unit. The second control unit can be configured to control one or more functions of the second asphalt paver.

[0017] The paving data can be recorded during the installation of the first pavement layer. The paving data can be recorded by the first paver. The paving data can be recorded by the first control system. The paving data can be stored in a data storage device. The data storage device can be integrated into the first paver. The data storage device can be connected to the first paver via data communication. The data storage device can, for example, be cloud storage. The data storage device can be a portable data medium that can be connected to the first paver. The portable data medium can, for example, be a floppy disk, a CD, a USB flash drive, a hard drive, an SSD, or a flash memory device. The data storage device can be part of an external electronic device, in particular a smart device.The external electronic device can include an operating system and a user interface. The external electronic device can be a handheld device. The external electronic device can include a display, particularly a touchscreen. The external electronic device can be configured, for example, as a PC, notebook, tablet PC, or smartphone. The external electronic device can be connected to the first paver for data communication. The external electronic device can be connected to the first paver via a wireless data connection and / or registered with the first paver. An app for saving or loading paving data can be installed on the external electronic device. The app can be configured to edit the paving data.

[0018] The first control system can at least partially automatically control the first paver during the installation of the second pavement layer based on the installation data. The second control system can at least partially automatically control the second paver during the installation of the second pavement layer based on the installation data. If the second pavement layer is installed using the second paver, the installation data can be transferred to the second paver before the second pavement layer is installed, or the second control system can retrieve the installation data from storage located outside the second paver, in particular from cloud storage. Retrieving the installation data by the second paver can involve transferring, in particular copying, the installation data to the second paver, or accessing the installation data by the second paver.For example, the second paver, and in particular its control system, can copy the paving data from cloud storage. The paving data can be processed in the cloud and then retrieved by the second paver. Specifically, the paving data can be transferred from the data storage to the second paver, or the second control system can retrieve the paving data from the data storage, which can be cloud storage. The second paver can retrieve the paving data after the first layer of asphalt has been completely laid. It can also retrieve the paving data during the laying of the second layer. Specifically, the second paver can retrieve the paving data continuously, periodically, or at least several times during the laying of the first layer.

[0019] The second road paver, or at least a function of the second road paver, can be remotely controlled via the cloud based on the installation data.

[0020] The fact that the installation data allows for the determination of specific information, such as a track traversed by the outer edge of a plank of the first paver during the installation of the first layer of asphalt, can include the fact that the corresponding information is directly contained in the installation data.

[0021] The fact that the installation data allows for the determination of specific information, such as a track traversed by the outer edge of a plank of the first paver during the installation of the first layer of asphalt, can include the fact that the corresponding information can be determined solely from the installation data.

[0022] The fact that the paving data allows for the determination of specific information, such as the track traversed by the outer edge of a screed of the first paver during the installation of the first layer of asphalt, can include the possibility of determining the corresponding information from the paving data by taking into account one or more other known pieces of information. These other known pieces of information can, for example, include machine data of the first paver, in particular its dimensions.

[0023] The paving data can allow the determination of a track traversed by the left outer edge of the first paver's screed during the installation of the first layer of asphalt. Alternatively or additionally, the paving data can allow the determination of a track traversed by the right outer edge of the first paver's screed during the installation of the first layer of asphalt. The track traversed by each screed edge can be represented in a fixed coordinate system.

[0024] The path left by the outer edge of a plank during the installation of the first layer of asphalt can, at least in essence, correspond to the course of a lateral boundary of the installed first layer. Using the path left by the outer edge of a plank during the installation of the first layer of asphalt as a guide can simplify the installation of the second layer of asphalt in the correct position and with the correct width.

[0025] The paving data can allow for the determination of a trajectory path traversed by a reference point, fixed relative to the chassis of the first paver, during the installation of the first asphalt layer. This reference point could, for example, be a theoretical pivot point of the first paver. The trajectory path traversed by the reference point can represent the path taken by the first paver during the installation of the first asphalt layer.

[0026] Described trajectory lines, in particular trajectory lines of plank edges or a trajectory line of a reference point stationary relative to the chassis of the first paver, can be trajectory lines formed by discrete points or continuous trajectories. The trajectory lines can, for example, have at least one data point per meter of the installed first pavement layer.

[0027] The paving data can allow for the determination of the orientation path of the first paver during the installation of the first asphalt layer. The orientation of the first paver can be specified, for example, as the angle between the paver's current direction of travel and a specific compass direction, such as north-south. The orientation of the first paver can be location-dependent. For example, the paving data can specify a value for each data point at the position of the reference point fixed to the first paver's chassis, defining a corresponding orientation of the first paver. For instance, at least one data point per meter of the installed first asphalt layer can be recorded for the orientation of the first paver.

[0028] The paving data can allow for the determination of the cross-slope angle of a paving screed of the first asphalt paver during the installation of the first pavement layer. The cross-slope of the paving screed can be a slope along a transverse direction perpendicular to the paving direction. The cross-slope angle can be an angle relative to a horizontal plane. For example, a section of the paving screed to the left of the paving direction may be higher or lower than a section to the right of the paving screed. A cross-slope of the paving screed allows for the installation of a sloped pavement, for example, in curves. At least one data point per meter of the installed first pavement layer can be recorded for the cross-slope angle.

[0029] Recording the paving data can include determining and / or recording the positions of at least two position measurement points in a fixed coordinate system. These at least two position measurement points can be two or more than two. The at least two position measurement points can be permanently mounted on the chassis of the first paver. The at least two position measurement points can be permanently mounted at known positions on the chassis of the first paver. The positions of the at least two position measurement points can be determined and / or recorded in pairs. The positions of the at least two position measurement points can be determined and / or recorded periodically during the paving of the first layer.

[0030] From a data pair recorded at a specific time, containing the positions of the two position measurement points at that specific time, it is possible to determine, particularly considering known geometric characteristics of the first paver, the position of the fixed reference point relative to the chassis of the first paver, specifically the theoretical pivot point of the first paver, at that specific time. Based on this data pair, or alternatively, and particularly considering known geometric characteristics of the first paver, the orientation of the first paver at that specific time can also be determined.

[0031] Recording the paving data can include determining the position of a left screed edge and / or a right screed edge of the first paver. The position of each screed edge can be the position of a point on the screed edge, in particular the position of a rear end or a rear endpoint of the screed edge. The position of each screed edge can be determined, for example, directly by a position sensor located on the screed edge, such as a GPS sensor. Alternatively, the position of each screed edge can be determined based on the extension position of an extension section of the paving screed of the first paver located on the respective side.The extension position of each section can be determined based on an associated extension position sensor, for example, a distance sensor attached to the screed, or based on a setting value for the respective screed extension position stored in the first control unit. From the extension position, particularly in combination with the positions of the two fixed position measuring points on the chassis of the first paver, the position of the respective outer edge of the screed of the first paver can be determined.

[0032] The second layer of asphalt can be laid using the first paver, i.e., the same paver used for the first layer. Alternatively, the second layer can be laid using a second paver. This second paver can be a different model than the first. If the second layer is laid using the second paver, the paving data can be transferred to the second paver with or without prior processing. The paving data can be transferred directly or indirectly to the second paver, for example, via a storage medium or a data connection. The paving data can also be transferred wirelessly.

[0033] The second layer of asphalt can be installed after the first layer has been completed. The second layer can be installed after the first paver has completed one pass to install the first layer.

[0034] If the second asphalt layer is laid using the second paver, this can optionally be done at least partially simultaneously with the first layer. The second paver can follow behind the first paver laying the first layer and lay the second layer. The distance between the first and second pavers along a paving direction during a joint paving run can be, for example, less than 100 m, less than 50 m, less than 25 m, less than 15 m, or less than 10 m. The second paver can receive paving data continuously or periodically during the laying of the second layer, in particular directly or indirectly from the first paver traveling ahead of it.The second road paver can process the installation data during the installation of the second layer of asphalt.

[0035] The first paver can include a tractor and a screed attached to the tractor. The tractor can include a chassis. The screed can be designed for the floating installation of a road surface. At the front, in the direction of paving, the first paver can include a material hopper for receiving paving material. During the installation of a surface layer, paving material can be conveyed from the hopper to the rear, opposite the direction of paving, and fed to the screed. The screed can then smooth and compact the paving material.

[0036] The screed of the first paver can comprise a base screed and extension sections on both sides of the base screed, in particular a left extension section (viewed in the paving direction) and a right extension section (viewed in the paving direction). The extension sections can be extended and retracted laterally along a transverse direction perpendicular to the paving direction to vary the paving width. Changing the extension position of an extension section can be accomplished via actuators provided on the screed. The extension positions of the extension sections can be at least substantially stepless. Each extension section can engage a limiting plate that defines an outer edge of the screed on the respective side.

[0037] The second paver can include a tractor unit and a screed attached to the tractor unit. The tractor unit can include a chassis. The screed can be designed for the floating installation of a road surface. At the front, in the direction of paving, the second paver can include a material hopper for receiving paving material. During the installation of a surface layer, paving material can be conveyed from the hopper to the rear, opposite the direction of paving, and fed to the screed. The screed can then smooth and compact the paving material.

[0038] The screed of the second paver can comprise a base screed and extension sections on both sides of the base screed, in particular a left extension section (viewed in the paving direction) and a right extension section (viewed in the paving direction). The extension sections can be extended and retracted laterally along a transverse direction perpendicular to the paving direction to vary the paving width. Changing the extension position of an extension section can be accomplished via actuators provided on the screed. The extension positions of the extension sections can be at least substantially stepless. Each extension section can have a limit plate that defines an outer edge of the screed on the respective side.

[0039] During the installation of the second layer of asphalt, the steering of the first or second asphalt paver can be controlled based on the installation data, in particular automatically.The guidance of the first or second asphalt paver during the installation of the second pavement layer can be controlled based on one or more of the following: a track traversed by an outer edge of a screed of the first asphalt paver during the installation of the first pavement layer; a track traversed by a left outer edge of a screed of the first asphalt paver during the installation of the first pavement layer; a track traversed by a right outer edge of a screed of the first asphalt paver during the installation of the first pavement layer; a track traversed by the reference point, which is stationary relative to the chassis of the first asphalt paver, during the installation of the first pavement layer; a track traversed by the theoretical pivot point of the first asphalt paver during the installation of the first pavement layer; or the orientation of the first asphalt paver during the installation of the first pavement layer.

[0040] Based on the installation data, the steering of the first or second paver can be controlled during the installation of the second layer of asphalt in such a way that the second paver follows at least the most essential track that the first paver followed when installing the first layer of asphalt.

[0041] The first or second paver can be controlled, based on the paving data, to lay the second layer of asphalt in the same direction as the first layer. Alternatively, the first or second paver can be controlled, based on the paving data, to lay the second layer in the opposite direction to that used for the first layer. Laying the second layer in the opposite direction can have the advantage that the paver does not need to return to its starting point to lay the second layer.An operator can select the installation direction for the second asphalt layer (either the same or opposite to the direction used for the first layer). This selection can be made via an operator input. Alternatively, the installation direction can be automatically determined based on the positioning and / or orientation of the paver laying the second layer before installation begins, particularly through a control system for the paver.

[0042] Based on the installation data, the first road paver can be controlled to return to a starting point of the installation of the first pavement layer on the installed first layer, in particular to return automatically.

[0043] During the installation of the second pavement layer, the screed width setting of the first or second paver can be controlled based on the paving data, and in particular, can be controlled automatically. The screed width setting can include the extension position of a left extension section of the paving screed of the first or second paver and / or the extension position of a right extension section of the paving screed of the first or second paver. During the installation of the second pavement layer, the first or second paver can be controlled based on the paving data such that the outer edges of the screeds of the first or second paver at least substantially follow the path of the outer edges of the screeds of the first paver during the installation of the first pavement layer.When installing the second layer of asphalt, the first or second paver can be controlled based on the installation data so that the outer edges of the screeds of the first or second paver run within limits that are offset from the outer edges of the screeds of the first paver during the installation of the first layer. The second layer can be installed at least slightly narrower than the first. This narrower installation of the second layer ensures that it is fully supported by the first layer.

[0044] A track traversed by the outer edge of the screed of the second paver can be a track of a point on the outer edge of the screed or a point on the outer edge of the screed. Preferably, the track traversed by the outer edge of the screed of the second paver is a track of a rear end or a rear endpoint of the outer edge of the screed. The path of a rear end or a rear endpoint of the outer edge of the screed can represent a lateral outer boundary of the second pavement layer.

[0045] During the installation of the second asphalt layer, the cross slope setting of the screed of the first or second asphalt paver can be controlled based on the installation data, and in particular, automatically controlled. During the installation of the second asphalt layer, the cross slope setting of the screed of the first or second asphalt paver can be controlled based on the installation data in such a way that the location-dependent cross slope setting corresponds to the location-dependent cross slope setting used during the installation of the first asphalt layer.

[0046] From the recorded paving data, at least one track traversed by the outer edge of the screed of the first paver during the installation of the first layer can be determined and used, with or without prior preparation, as a target track for the outer edge of the screed of the first or second paver during the installation of the second layer. Prior preparation may include smoothing and / or shifting the determined track of the outer edge of the screed of the first paver.

[0047] From the recorded paving data, a track traversed by the left outer edge of the screed of the first paver during the installation of the first layer of asphalt can be determined. This track can then be used, with or without prior preparation, as a guideline for the outer edge of the screed of either the first or second paver during the installation of the second layer of asphalt. Similarly, a track traversed by the right outer edge of the screed of the first paver during the installation of the first layer of asphalt can be determined from the recorded paving data. This track can then be used, with or without prior preparation, as a guideline for the outer edge of the screed of either the first or second paver during the installation of the second layer of asphalt.

[0048] For example, the processing can involve shifting a guide track on the outer edge of a plank, or shifting the guide tracks of both outer edges of planks to the other guide track. This can reduce the installation width for the second layer of paving, which can ensure, in particular, that the second layer is adequately supported by the first.

[0049] From the recorded paving data, a trajectory path traversed during the installation of the first pavement layer can be determined, starting from a reference point fixed relative to the chassis of the first paver, in particular a theoretical pivot point of the first paver. This path can then be used, with or without prior preparation, as a target path for a reference point fixed relative to the chassis of the first or second paver during the installation of the second pavement layer. Prior preparation may include smoothing and / or shifting the determined trajectory path.

[0050] Shifting a track alignment, in particular shifting a track alignment of a screed's outer edge or shifting a track alignment of the reference point fixed relative to the chassis of the first paver, can involve shifting the entire track alignment, as a rigid object, around a specific vector. Alternatively, shifting a track alignment, in particular shifting a track alignment of a screed's outer edge or shifting a track alignment of the reference point fixed relative to the chassis of the first paver, can involve shifting each point of the track alignment orthogonally to the original curve, so that the radii also change when a curved track is shifted.

[0051] Moving a route can involve moving the entire route, moving only one or more sections of the route, or moving different sections of the route differently.

[0052] Before smoothing a track, especially before smoothing a track of a plank's outer edge or smoothing a track of the reference point that is stationary relative to the chassis of the first paver, data reduction can take place, i.e., a reduction of data points or support points of the track.

[0053] From the recorded paving data, at least one track traversed by the outer edge of the first paver's screed during the installation of the first layer of asphalt can be determined and displayed. Specifically, the recorded paving data can be used to determine and display a track traversed by the left outer edge of the first paver's screed and a track traversed by the right outer edge of the first paver's screed during the installation of the first layer of asphalt.

[0054] From the recorded installation data, a track traversed during the installation of the first layer of asphalt from a reference point fixed relative to a chassis of the first asphalt paver, in particular a theoretical pivot point of the first asphalt paver, can be determined and displayed on a screen.

[0055] Route traces displayed on the screen can be shown together with a map or with an aerial image.

[0056] The display may be located on or attached to the first paver, the second paver, or an external device.

[0057] The invention will now be further explained with reference to the figures and embodiments. Fig. 1 shows a schematic perspective view of a road paver according to one embodiment. Fig. 2 shows a schematic top view of the road paver according to the embodiment. Fig. 3 shows a schematic representation of traces recorded during the installation of a first layer of asphalt. Fig. 4 shows a schematic representation of a display of the recorded traces on a screen after at least partial processing. Fig. 5shows a schematic representation of the installation of a second surface layer on top of the first surface layer.

[0058] Figure 1 Figure 1 shows a schematic representation of a road paver 1 according to one embodiment. The road paver 1 comprises a tractor 3 and a screed 5 attached to the tractor 3. The screed 5 can be designed as a screed 5 for the floating installation of a road surface. The road paver 1 includes an operator platform 7, which provides space for an operator. A control panel 9 is provided on the operator platform 7, via which the operator can control functions of the road paver 1. A display 11 is also provided on the operator platform 7. The road paver 1 includes a control unit 13 for controlling machine components of the road paver 1. The control unit 13 is connected to the control panel 9 for data communication.

[0059] In the direction of travel 15 at the front, the road paver 1 includes a material hopper 17 for receiving paving material. During the paving of a surface course, paving material is conveyed from the material hopper 17 against the direction of travel 15, under the operator's platform 7, to the rear and presented to the screed 5. The screed 5 smooths and compacts the paving material. For this purpose, the screed 5 can, for example, have smoothing plates and compaction devices. The compaction devices can, for example, include vibratory elements or tamping elements.

[0060] Figure 2Figure 1 shows a schematic top view of the road paver 1. Two position measuring points 19 are provided on the road paver 1, specifically on the towing vehicle 3. The position measuring points 19 are fixed to a chassis of the road paver 1. Each position measuring point 19 allows the determination of its absolute position in a fixed coordinate system. For example, each position measuring point 19 can include a GNSS receiver, such as a GPS receiver. The position of the road paver 1 can be determined from measurement data indicating the positions of the position measuring points 19. For example, the position of a reference point 21, which is fixed relative to the road paver 1, specifically relative to a chassis of the road paver 1, can be determined.The stationary reference point 21 can, for example, be 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 by taking into account the known relative positions between the position measuring points 19 and the reference point 21.

[0061] Since the relative positions of the position measurement points 19 and their relationship to the paver 1, particularly to a chassis of the paver 1, are known, the orientation of the paver 1 in space can also be determined based on the determined positions of the position measurement points 19. The orientation of the paver 1 can, for example, be specified as an angle, as seen from a top view of the paver 1, between the current paving direction 15 and a specific cardinal direction, such as a north-south direction.

[0062] The screed 5 of the road paver 1 comprises a base screed 23 and extension sections provided on both sides of the base screed 23, in particular a left extension section 25 (viewed in the paving direction 15) and a right extension section 27 (viewed in the paving direction 15). The extension sections 25 and 27 can be extended and retracted laterally along a transverse direction 29 perpendicular to the paving direction 15 in order to vary the paving width. Changing the extension position of an extension section 25 or 27 can be accomplished via actuators provided on the screed 5. The extension positions of the extension sections 25 and 27 can be adjusted at least substantially steplessly.

[0063] The cross-slope angle of the screed 5 can be varied via one or more additional actuators. The cross-slope angle of the screed 5 specifies the angle at which the screed 5 is inclined relative to the horizontal plane along the transverse direction 29 when a road paver 1 is standing on a horizontal surface. By changing the cross-slope angle of the screed 5, a pavement layer with a cross slope can be installed.

[0064] In the illustrated embodiment, a screed position measuring point 35 is provided at each rear end of the outer edges 31 of the screed. The screed position measuring points 35 can, for example, each include a GNSS receiver, in particular a GPS receiver, which allows direct measurement of the absolute position of the respective screed position measuring point 35. Alternatively, the positions of the rear ends of the outer edges 31, 33 of the screed could be determined, for example, by relating the instantaneous extension position of the respective extension section 25, 27 of the screed 5 to the determined positions of the position measuring points 19 or values ​​derived therefrom. The instantaneous value of the extension position of an extension section 25, 27 of the screed 5 can, for example, be determined from setting values ​​for the extension position or by a screed width sensor.

[0065] The invention relates to the installation of a multi-layered road surface. First, a first surface layer is installed along a roadway. At a later stage, a second surface layer is installed over the first surface layer along the same roadway. The second surface layer can be installed directly on top of the first surface layer, or one or more intermediate layers can be present between the first and second surface layers.

[0066] The first layer of asphalt is laid using a first asphalt paver 1, which lays the asphalt in the Figures 1 and 2 The configuration shown can be used. The second layer of asphalt can be laid using the same paver 1, i.e., also using the first paver 1. Alternatively, a different paver 1, in particular a second paver 1, can be used to lay the second layer of asphalt. The second paver 1 can also be used in the configuration shown. Figures 1 and 2shown configuration.

[0067] During the installation of the first asphalt layer, the asphalt paver 1 is at least partially manually controlled. For example, the steering of the asphalt paver 1, the screed width control of the asphalt paver 1, and the cross slope adjustment of the paving screed 5 of the asphalt paver 1 can be manually controlled during the installation of the first asphalt layer. The screed width control can include setting an extension position for the left extension section 25 and an extension position for the right extension section 27 of the paving screed 5.

[0068] During the installation of the first asphalt layer, the control unit 13 of the asphalt paver 1 records installation data. This installation data includes a track 41 traversed by the reference point 21 of the asphalt paver 1, or allows for the determination of a track 41 traversed by the reference point 21 of the asphalt paver 1. The installation data includes a track 43 traversed by the left outer edge 31 of the screed of the asphalt paver 1 during the installation of the first asphalt layer, or allows for the determination of a track 43 traversed by the left outer edge 31 of the screed of the asphalt paver 1 during the installation of the first asphalt layer. The installation data includes a track 45 traversed by the right outer edge 33 of the screed of the asphalt paver 1 during the installation of the first asphalt layer, or allows for the determination of a track 45 traversed by the right outer edge 31 of the screed of the asphalt paver 1 during the installation of the first asphalt layer.

[0069] Figure 3 The diagram shows the traces 41, 43, and 45 in a schematic top view. As in Figure 3 The dashed lines representing the traces 41, 43, 45 symbolize that the traces 41, 43, 45 can each be recorded and / or defined by recording discrete measurement points.

[0070] The track 41 of reference point 21 can be determined based on position measurements of the position measuring points 19. The tracks 43, 45 of the plank outer edges 31, 33 can be determined based on the position measurements of the plank position measuring points 35.

[0071] The track patterns 41, 43, 45 can be determined during the installation of the first layer of asphalt, in particular by the control unit 13, and stored as track patterns 41, 43, 45. Alternatively, data can be stored during the installation of the first layer of asphalt, in particular by the control unit 13, which allows for the later determination of the track patterns 41, 43, 45. The data can include position determinations of the position measuring points 19 and position determinations of the plank position measuring points 35.

[0072] Traces 41, 43, 45 can be displayed on display 11. Figure 4Figure 11 schematically shows a view of the display while the track patterns 41, 43, and 45 are displayed. The track patterns 41, 43, and 45 can be displayed on the display 11 against a map or an aerial photograph to facilitate their placement within the actual environment. The current position of the road paver 1 can be displayed along with the track patterns 41, 43, and 45.

[0073] The track patterns 41, 43, 45 recorded during the installation of the first asphalt layer, or the installation data recorded during the installation of the first asphalt layer which allow the determination of the track patterns 41, 43, 45, are used to control the asphalt paver 1 during the installation of the second asphalt layer. In particular, the asphalt paver 1 is controlled at least partially automatically during the installation of the second asphalt layer based on the recorded installation data.

[0074] Figure 5 Figure 1 shows the paver 1 laying the second layer of asphalt, with the guidance lines 41, 43, and 45 also shown. The paver 1 is steered based on the paving data to lay the second layer of asphalt such that the reference point 21 of the paver 1 moves along guidance line 41. The extension positions of the extension sections 25 and 27 of the screed 5 of the paver 1 are controlled during the laying of the second layer of asphalt such that the screed position measuring points 35 follow the guidance lines 43 and 45.

[0075] The steering of the paver 1 and / or the extension positions of the extension sections 25, 27 can be manually controlled during the installation of the second pavement layer based on the installation data. For this purpose, a representation of the paving paths 41, 43, 45, along with a model of the paver 1, can be displayed to the operator on the display 11. Based on this display, the operator can control the paver 1 to install the second pavement layer based on the installation data. In an at least partially automated embodiment, at least the steering of the paver 1 and / or the extension positions of the extension sections 27, 29 of the screed 5 of the paver 1 are controlled automatically by the paver 1's control unit 13 based on the installation data.

[0076] Before the paving data, or rather the guidance lines 41, 43, 45 defined by the paving data, are used to control the paver 1 during the installation of the second pavement layer, the paving data, or rather the guidance lines 41, 43, 45, can be edited. Such editing can include smoothing the guidance lines 41, 43, 45. Additionally or alternatively, the editing can include shifting one or more of the guidance lines 41, 43, 45. The editing can be performed directly on the paver 1, in particular using the paver 1's control unit 13. Editing the paving data, or rather the guidance lines 41, 43, 45, can also be based on user input. For example, a user can define a smoothing algorithm to be used and / or define a desired shift of one or more of the guidance lines 41, 43, 45.

[0077] Further data can be recorded during the installation of the first asphalt layer and used, in particular, for the automatic control of the asphalt paver 1 during the installation of the second asphalt layer. For example, a location-dependent profile of the cross slope setting of the paver screed 5 can be recorded during the installation of the first asphalt layer. In particular, a corresponding value for the cross slope setting can be recorded for each measuring point of the track 41 of the reference point 21. During the installation of the second asphalt layer, the control system 13 can control a cross slope setting of the asphalt paver 1 based on the installation data, according to the profile of the cross slope setting during the installation of the first asphalt layer.

Claims

1. Method for paving a multi-layer road surface, comprising: paving a first pavement layer along a roadway using a first road paver (1); and paving a second pavement layer over the first pavement layer using the first road paver (1) or using a second road paver (1); wherein upon paving the first pavement layer, paving data is recorded that allows determining at least a progression track (43, 45) traveled during paving of the first pavement layer by a screed outer edge (31, 33) of the first road paver (1); and wherein the paving data is used to control the first road paver (1) or the second road paver (1) when the second pavement layer is paved.

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

3. Method according to any one of the preceding claims, wherein the paving data allows determining a progression track (43) traveled during paving of the first pavement layer by a left screed outer edge (31) of the first road paver (1) and a progression track (45) traveled during paving of the first pavement layer by a right screed outer edge (33) of the first road paver (1).

4. Method according to any one of the preceding claims, wherein the paving data allows determining a progression track (41) traveled during paving of the first pavement layer by a reference point (21) that is stationary relative to a chassis of the first road paver (1), in particular by a theoretical turning point of the first road paver (1).

5. Method according to any one of the preceding claims, wherein the paving data allows determining a progression through which the orientation of the first road paver (1) went during paving of the first pavement layer.

6. Method according to any one of the preceding claims, wherein the paving data allows determining a progression through which a lateral inclination angle of a screed (5) of the first road paver (1) went during paving of the first pavement layer.

7. Method according to any one of the preceding claims, wherein recording the paving data comprises determining positions of at least two position measuring points (19) in a stationary coordinate system, wherein the two position measuring points (19) are provided in a stationary manner at a chassis of the first road paver (1).

8. Method according to any one of the preceding claims, wherein steering of the first road paver (1) or the second road paver (1) is controlled, in particular in an automated manner, based on the paving data when the second pavement layer is paved.

9. Method according to any one of the preceding claims, wherein a screed width setting of the first road paver (1) or the second road paver (1) is controlled, in particular in an automated manner, based on the paving data when the second pavement layer is paved.

10. Method according to any one of the preceding claims, wherein a lateral inclination setting of a screed (5) of the first road paver (1) or the second road paver (1) is controlled, in particular in an automated manner, based on the paving data when the second pavement layer is paved.

11. Method according to any one of the preceding claims, wherein at least a progression track (43, 45) traveled by a screed outer edge (31, 33) of the first road paver (1) during paving of the first pavement layer is determined from the recorded paving data and is used, with or without prior processing, as target track for a screed outer edge (31, 33) of the first road paver (1) or the second road paver (1) when the second pavement layer is paved.

12. Method according to any one of the preceding claims, wherein a progression track (41) traveled by a reference point (21) that is stationary relative to a chassis of the first road paver (1), in particular a theoretical turning point of the first road paver (1), 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 a reference point (21) that is stationary relative to a chassis of the first road paver (1) or the second road paver (1) when the second pavement layer is paved.

13. Method according to claim 11 or 12, wherein prior processing comprises smoothing and / or offsetting the determined progression track (41, 43, 45).

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

15. Method according to any one of the preceding claims, wherein a progression track (41) traveled during paving of the first pavement layer by a reference point (21) that is stationary relative to a chassis of the first road paver (1), in particular a theoretical turning point of the first road paver (1), is determined from the recorded paving data and is displayed on a display (11).

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