Road paver with projector

Abstract

To provide a road paver and a method for enabling control of operation of a paving screed attached to the road paver.SOLUTION: A road paver 1 for producing a paving layer B comprises a chassis 2 and a height-adjustably mounted paving screed 3 for compacting a paving material E, where the paving screed 3 has an external control station 8 with a control device 9 comprising an operation panel for setting process parameters and a display for displaying process parameters. The road paver 1 further comprises a projector 7 which is configured to project the process parameters set on the operation panel and displayed on the display 12 onto a projection area so that the projected process parameter is visible in particular to an operator of the paving screed 3. The invention also refers to a method for projecting a process parameter by means of the projector 7 of the road paver 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a road paver according to claim 1. Furthermore, the present invention relates to a method according to claim 11. [Background technology]

[0002] A typical road paver is in practice for generating a surface layer of a new road. The known road paver comprises a paving screed which has at its side an external control station for a screed operator, which can set and check various process parameters. At the external control station, the screed operator can adjust, for example, the paving width, the paving thickness, the various compaction sections and / or the heating elements of the paving screed in order to pave the desired new road surface layer. The process parameters set by the screed operator can be displayed by means of a display of the external control station of the paving screed. Furthermore, the actually generated process parameters can be visualized on the display. The screed operator, who is moving laterally in close proximity to the external control station during the paving operation of the road paver, can thus monitor the control and the paving result.

[0003] EP 3402928 B1 discloses a road paver having a projector arranged to project navigation guidelines onto a surface traversed by the road paver.

[0004] EP 3124698 B1 discloses a road paver having a projector arranged to cause a compaction vehicle following the road paver to project rolling instructions onto a newly created pavement layer. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] European Patent Application Publication No. 3,402,928B1 [Patent Document 2] European Patent Application Publication No. 3,124,698B1 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to provide a method which makes it possible to control the operation of a road paver as well as a paving screed attached to the road paver, thereby providing better control over the quality of the paving layer produced.

[0007] This object is achieved by a road paver having the features of claim 1. Furthermore, this object is achieved by a method having the features of claim 11. Further advantageous features of the invention are set out in the dependent claims.

[0008] The road paver according to the invention is configured to produce a paving layer, such as an asphalt layer. The road paver comprises a chassis and a height-adjustable paving screed for compacting the paving material. The paving screed has at least one external control station for a screed operator. The external control station has a control device with at least one operating panel for setting process parameters on the paving screed and / or at least one display for displaying the process parameters set on the paving screed.

[0009] The road paver according to the invention is characterized by at least one projector configured to cause at least one process parameter set on the operating panel and / or displayed on the display to be projected onto at least one projection area, thereby making the projected process parameter visible in particular to a screed operator of the paving screed.

[0010] The process parameters set and / or displayed at the external control station are additionally made visible by being projected onto one or more projection areas. This allows the screed operator to check the paving screed process parameters set at the external control station and / or displayed on the display of the operating panel, even if he is not directly present at the external control station. This allows the screed operator to monitor the paving process even more effectively, as the projected process parameters are also visible to other on-site personnel, such as the paver operator and the paving team supervisor. This automatically enables the multiple eye check principle for quality assurance.

[0011] The process parameters can be projected onto the projection area in the form of numerical values, a series of letters, and / or symbols in the optical visibility range. Optionally, the projected numerical values ​​can be supplemented by SI symbols, such as length designations, frequency units, and / or temperature units.

[0012] In the absence of a process parameter set point, the set and / or detected process parameters may be intermittently projected onto the projection area to better indicate an erroneous condition as a warning signal. In one variation, the projected process parameters may change color to indicate paving values ​​that are set point or non-set point in different colors. The color adjustment of the projection may also be made in response to detected weather conditions or light conditions at the paving site.

[0013] The projector is preferably configured to project the process parameters onto the paving layer produced by the road paver, which allows workers in the paving screed area to visually inspect the newly produced paving layer and recognize which paving process parameters were used to produce the new paving layer.

[0014] In one embodiment of the invention, the projector is configured to project the process parameters onto a projection area formed on the road paver. In this variant, the road paver itself, i.e. its bodywork and / or screed body, is used as the projection area for imaging the process parameters. Imaging the process parameters directly onto the surface of the road paver can be advantageous, especially in certain weather conditions.

[0015] In a practical variant, the paving screed forms a projection area for displaying the process parameters. The paving screed offers a sufficiently large surface that can be conveniently used as a projection area. The projected process parameters are made clearly visible not only to the screed operator but also to other workers of the road paver, i.e. the driver of a car, in order to pay closer attention to the production parameters of the new pavement layer.

[0016] Preferably, the paving screed comprises a base screed body and a laterally extendable extension part attached to the base screed body for varying the paving width, the projection area being provided on the top cover of the base screed body, the top cover of the base screed body forming an excellent projection area for the process parameters projected thereon, whereby the projected process parameters can remain in view even if the screed operator turns to the opposite side of the external operating stand.

[0017] It would be advantageous if the process parameters of the base screed body and / or the telescopic parts attached to it, which are set and / or displayed at an external control station, could be displayed on the projection area regardless of where the projection area is located. In this way, the screeding operation can be better monitored over the entire paving width by projection.

[0018] The projector can be configured to display the process parameters both on a projection area formed on the road paver and on a projection area formed on the generated pavement layer, where the road paver and the generated pavement layer on the road paver each form at least one projection area for the projector.

[0019] In an objective embodiment, the projector is configured to automatically adjust the position of the projection area depending on the detected position of the screed operator. For example, to provide this objective, the road paver's position detection system can track the movements of the screed operator, and the projector then automatically moves the position of the projection area, so that wherever the screed operator is in the area of ​​the paving screed, he or she can check the projected information of the projection area by moving relative to the detected position of the screed operator.

[0020] In one variant, a road paver is provided with a layer thickness measuring device, for example in the form of a measuring bar mounted on the side of the road paver, for determining the thickness of the generated pavement layer. The road paver has a projector mounted on the layer thickness measuring device, which can be configured to project the layer thickness of the generated pavement layer onto a projection area as measured by the layer thickness measuring device. This allows the detected layer thickness to be displayed on a display of an external control station at a remote location for on-site personnel, i.e. also directly on the road paver and / or on the newly generated pavement layer.

[0021] The road paver preferably has a roof structure including an operator protection roof on which the projector is mounted. From this height the projection area provided for the process parameters can be very easily adjusted. It is useful if the projector is integrated into an infrared camera module which is mounted on the operator protection roof.

[0022] In a preferred variant, the projector is mounted on the rear load spar of the roof structure. The projector can be mounted on the load spar of the roof structure located immediately behind the driver's seat in the direction of the pavement. In one embodiment, the projector is integrated into the load spar so that the load spar acts as a protective housing for the projector contained therein. It would also be possible for a projector to be mounted on each of the load spars on the left and right sides of the roof structure.

[0023] In an embodiment of the invention, the control device mounted on the external control station of the paving screed is equipped with a projector, in which case the control device of the external control station itself serves as a support for the projector, in particular the control device and the integrated projector are mounted on the external control station of the paving screed of the road paver and can be installed and removed without tools.

[0024] The projector can preferably be controlled by a control device of the external control station, in particular by a voice control module of the control device. This allows the screed operator to easily control the operation of the projector. The optical module of the projector can preferably be adjusted by an optical panel of a control device provided in the external control station of the paving screed. This makes it possible, for example, to vary the sharpness of the projected process parameters. Several image effects of the projector can be controlled by the control device of the external control station.

[0025] In a preferred variant, the external control station, in particular the control device provided for controlling the paving screed, comprises a presence detector for detecting the distance from the screed operator to the control device, and if no screed operator is detected within a predefined distance, the projector projects the process parameters in the projection area, thus enabling or disabling the operation of the projector depending on the measured distance between the control device and the screed operator.

[0026] In a variant, the projector is movably mounted on the road paver so that the position of the projection area can be changed. This makes it possible, for example, to adjust the projection area used by the road paver and / or the paving layer being produced depending on which side of the paving screed the screed operator is moving parallel to during the paving operation.

[0027] Preferably, the road paver comprises at least one detector for detecting actual process parameters in the paving screed. The projector is configured to display in a projection area, preferably in real time, actual process data detected by the detector during the operation of the road paver. This is an excellent way of monitoring the actual paving result.

[0028] For example, the generated pavement thickness, the pavement width, and / or the pavement layer temperature may be visually displayed in the projection area. At least one compaction unit setting, such as tamper speed and / or tamper stroke length, may also be imaged in the projection area.

[0029] The invention also refers to a method on a road paver for projecting onto a projection area at least one process parameter that is set and / or displayed at an external control station of the paving screed by a projector provided on the road paver. The projector preferably projects the process parameter onto a projection area formed directly on the road paver and / or onto a paving layer produced by the road paver. In this way, the process parameters that are set and / or displayed on the paving screed of the road paver become more controllable for on-site personnel.

[0030] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings. [Brief description of the drawings]

[0031] [Figure 1] FIG. 1 shows a perspective view of a road paver according to the present invention. [Diagram 2]FIG. 2 shows the control device of the external control station of the paving screed. [Diagram 3] FIG. 3 shows the projected areas on the road paver and on the generated pavement layers for replicating the projected process parameters. [Figure 4] FIG. 4 shows a paving screed having a base screed body and an extension part which is laterally extendable. [Diagram 5] FIG. 5 shows a paving screed having a base screed body, a laterally extendable extension part and add-on parts attached thereto. [Figure 6] FIG. 6 shows a road paver with a layer thickness measurement device and an attached projector. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] In the drawings, identical elements are labeled with identical reference numbers.

[0033] Figure 1 shows a road paver 1 for producing a paving layer B. The road paver 1 comprises a chassis 2 and a paving screed 3 mounted for height adjustment and towed in the direction of travel R in order to compact the paving material E fed to the paving screed 3 from a hopper 4 of the road paver 1. In addition, the road paver 1 comprises a roof structure 5 having an operator protection roof 6 supported at the rear by loading spars 21a and 21b on the left-hand and right-hand sides as seen in the direction of travel R.

[0034] FIG. 1 shows a projector 7 mounted on the operator protection roof 6, where the projector 7 is integrated with an infrared camera K capable of detecting a thermal image of the newly paved pavement layer B. The paving screed 3 is equipped with external control stations 8 and 8' at the sides for the screed operator. Each external control station 8 and 8' at the sides has a control device 9 and 9' configured for inputting and displaying process parameters of the paving screed 3. Each control device 9 and 9' is mounted on a telescopic part 10 and 10' that can be telescopically extended to the left and right of the paving screed 3 and is always accessible to the operator at the side of the produced pavement layer B.

[0035] Figure 2 shows an enlarged view of the control device 9 of the external control station 8 from figure 1. The control device 9' of the opposite external control station 8' can also be configured correspondingly.

[0036] In Fig. 2, the control device 9 comprises an operation panel 11 for setting process parameters P, and a display 12 for displaying the process parameters P. The display 12 makes it possible to display to the screed operator both the process parameters P to be set and the process parameters P' detected during the paving movement of the road paver 1, thereby enabling the screed operator to monitor the generation process of the new paving layer B on the display 12.

[0037] Figure 2 shows diagrammatically that the control device 9 can be equipped with the projector 7 of figure 1 or with an additional projector 7'. The process parameters P, P' set and / or displayed directly on the control device 9 can then be transferred without any problem to the projectors 7 and 7' of the control device 9. Furthermore, figure 2 shows diagrammatically an audio control module 40 which can be used to control the operation of the control device 9, in particular the projectors 7 and 7'.

[0038] The projectors 7 and 7' shown in Figures 1 and 2 are formed to project at least one process parameter P and P', which is set on the operation panel 11 in Figure 2 and / or displayed on the display 12 in Figure 2, onto at least one projection area 13 and 13' (see Figure 3), so that a screed operator of the paving screed 3 can view the projected process parameters P and P'.

[0039] Projection areas 13 and 13' for imaging the process parameters P and P' are shown in Fig. 3. In particular, the projector 7 is able to project the process parameters P and P' onto a pavement layer B produced by the road paver 1, as diagrammatically indicated by the projection area 13. Furthermore, Fig. 3 shows that the projector 7 can alternatively or additionally be configured to project the process parameters P and P' onto the projection area 13' directly on the road paver 1, i.e. the road paver 1 itself is configured to form the projection area 13'.

[0040] Figure 3 shows that the paving screed 3 constitutes a projection area 13' for imaging the process parameters P and P'. In particular, the paving screed 3 of Figure 3 has a base screed body 14 to which are attached telescopic parts 10 and 10' which can be extended and retracted to the left and right to vary the width of the pavement. As shown in Figure 3, the projection area 13' is formed in an upper cover 15 of the base screed body 14.

[0041] FIG. 3 shows in dotted lines that, as an alternative to mounting on the illustrated operator protection roof 6, the projector 7 can be mounted on one of the loading spars 21a or 21b, but will typically be mounted on the loading spars 21a and / or 21b located immediately aft of the driver's seat 22.

[0042] The arrows A and A', shown diagrammatically in Figure 3, indicate an optional adjustment of the respective projection areas 13 and 13', for example depending on the position of the screed operator. In Figure 3, for example, in case of a change of position of the screed operator from the right-hand side of the paving screed 3 to the opposite left-hand side, seen in the direction of movement R, i.e. from external control station 8 to external control station 8', the projection areas 13 and 13' can be shifted to the opposite external control station 8'. The change of side can be effected via the tread plate 16 and can be detected by the presence detection 20 (see Figure 2) of the control devices 9 and 9'.

[0043] Figure 4 shows the paving screed 3 with laterally telescopic extensions 10 and 10'. This makes it clear that each external control station 8 and 8' is spaced further laterally from the base screed body 14 to create a wider paving width. In Figure 4, the projection area 13' is still on the top cover 15 of the base screed body 14. The process parameters P and P' projected on the projection area 13' can then also be controlled by an operator standing behind the base screed body 14, centred on the tread plate 16. Similarly, the process parameters P and P' projected on the projection area 13' remain fully visible to the driver.

[0044] Figure 5 shows the paving screed 3 with laterally extending telescopic sections 10 and 10' and add-on parts 17 and 17' attached to them. Each external control station 8 and 8' extends further laterally relative to the base screed body 14. However, the process parameters P and P' shown in the projection area 13' remain neatly visualized on the base screed body 14, especially for the operator of the road paver 1.

[0045] Figure 6 shows a road paver 1 with a layer thickness measuring device 30 mounted laterally for determining the layer thickness of the paving layer B to be produced. The layer thickness measuring device 30 is mounted on the towing bar 19 for the paving screed 3. The layer thickness measuring device 30 has a beam 31 behind the paving screed 3 and is positioned above the newly produced paving layer B. A projector 7 is mounted on the beam 31 for projecting the process parameters P' set and / or displayed in the external control station 8, i.e. the layer thickness measured by the layer thickness measuring device 30, onto the projection area 13.

[0046] The invention is highly suitable for visualizing the process parameters P and P' (possibly a selection thereof) set and / or displayed at the external control stations 8 and 8' for the construction site workers by separate display by projection in the projection areas 13 and 13' in addition to displaying them on the control devices 9 and 9', thereby allowing an improved quality control of the pavement layer B being produced.

Claims

1. A road paver (1) for producing a pavement layer (B) comprises: A chassis (2); a paving screed (3) mounted in a height-adjustable manner for compressing the paving material (E); Equipped with said paving screed (3) having at least one external control station (8, 8') with a control device (9, 9') having at least one operation panel (11) for setting process parameters (P) of said paving screed (3) and at least one display (12) for displaying process parameters (P, P') set at said paving screed (3), and at least one projector (7, 7') configured to project at least one of said process parameters (P, P') set at said operation panel (11) and displayed on said display (12) onto at least one projection area (13, 13'), so that said projected process parameters (P, P') are visible to a screed operator of said paving screed (3), the projector (7, 7') is configured to project the process parameters (P, P') onto a projection area (13) formed by the pavement layer (B) to be generated, Road paver (1), characterized in that the paving screed (3) forms a projection area (13') for imaging the process parameters (P, P').

2. 2. A road paver according to claim 1, The paving screed (3) comprises a base screed body (14) and an extension part (10, 10') attached to the base screed body (14) and capable of extending and retracting laterally to change the paving width; A road paver, characterized in that the projection area (13') is provided on an upper cover (15) of the base screed body (14).

3. A road paver according to claim 1 or 2, 1. A road paver, comprising: a projector (7, 7') configured to automatically displace the position of the projection area (13, 13') depending on the detected position of a screed operator relative to the external control station (8, 8').

4. A road paver according to any one of claims 1 to 3, The road paver (1) is provided with a layer thickness measuring device (30) for determining the layer thickness of the pavement layer (B) to be generated, A road paver, characterized in that the projector (7) is attached to the layer thickness measuring device (30).

5. A road paver according to any one of claims 1 to 4, The road paver (1) comprises a roof structure (5), The projector (7) is fixed to the loading spars (21a, 21b) of the roof structure (5) or is provided on an operator protection roof (6) so as to be integrally configured as a fixed infrared camera (K).

6. A road paver according to any one of claims 1 to 5, 13. A road paver, comprising: a control device (9, 9') mounted on the external control station (8, 8') of the paving screed (3), the control device (9, 9') comprising the projector (7, 7').

7. A road paver according to any one of claims 1 to 6, 13. A road paver, comprising: a projector (7, 7') controllable by the control device (9, 9') of the external control station (8, 8').

8. A road paver according to any one of claims 1 to 7, The control device (9, 9') comprises a voice control module (40), and the operation of the projector (7, 7') can be controlled by the voice control module (40).

9. A road paver according to any one of claims 1 to 8, The paving screed (3) comprises at least one detection unit, The projector (7) is configured to visually image the paving thickness, paving width and / or temperature of the projection area (13, 13') as process parameters (P') of the paving screed (3) detected by the detection unit during operation of the paving screed (3).

10. A road paver according to any one of claims 1 to 9, 13. A road paver, comprising: a road paver for paving a road surface of a paving screed including a first surface of said paving screed;

11. 1. A method for projecting, by a projector (7, 7') provided on a road paver (1), at least one process parameter (P, P') set and displayed at an external control station (8, 8') of a paving screed (3) onto a projection area (13, 13'), the process parameter (P, P') being set and displayed at an external control station (8, 8') of a paving screed (3), comprising:

4. A method for road paver (1), characterized in that the projection area (13') is formed on the paving screed (3) and / or on the paving layer (B) to be produced.

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