Road paver with projector

Abstract

A road paver for producing a paving layer comprises a chassis and a paving screed mounted in a height-adjustable manner for compacting the paving material, the paving screed having at least one external operating station with a control device having at least one operating panel for setting process parameters of the paving screed and / or at least one display for displaying process parameters set on the operating panel, wherein at least one projector is formed to project at least one of the process parameters set on the operating panel and / or displayed on the display onto at least one projection area such that the process parameter projected onto the projection area is visible to a screed operator of the paving screed. The projector is adapted to project the process parameter onto a first projection area formed by the paving layer produced, and / or the paving screed forms a second projection area for imaging the process parameter. The invention also relates to a method for use on a road paver.

Description

[0001] Divisional application

[0002] The present application is a divisional application of the patent application No. 202110218767.1, titled “Road paver with projector”, filed with the China National Intellectual Property Office on February 26, 2021. TECHNICAL FIELD

[0003] The present invention relates to a road paver. Furthermore, the present invention relates to a method for a road paver as described above. BACKGROUND

[0004] General road pavers are used in practice for producing new paving layers. Known road pavers comprise a paving screed with a lateral outside control station for a screed operator from which various process parameters can be set and checked. At the outside control station of the screed, the screed operator can for example adjust the paving width, the paving thickness, various compaction units and / or heating elements of the paving screed in order to pave the desired new paving layer. The process parameters set by the screed operator can be displayed by a display on the outside control station of the paving screed. Furthermore, the actually produced process parameters can be visualized on the display. Thus, during the paving operation of the road paver, the screed operator moving directly in the vicinity of the outside control station can control and monitor the paving result.

[0005] EP 3 402 928 B1 discloses a road paver with a projector adapted to project a navigation guide onto the surface past which the road paver is driven.

[0006] EP 3 124 698 B1 discloses a road paver with a projector adapted to project a rolling instruction about the newly produced paving layer onto a compactor following the road paver. SUMMARY

[0007] It is an object of the present invention to provide a road paver and a method which enable controlling the operation of a paving screed attached to the road paver and which enable better controlling the quality of the paving layer produced thereby.

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

[0009] The road paver according to the application is characterized in that at least one projector is adapted to project at least one of the process parameters provided at the operating panel and / or shown on the display onto at least one projection area, such that the projected process parameters are visible, in particular to the screed operator of the paving screed.

[0010] By means of the projection onto one or more projection areas, it is also possible to make process parameters provided and / or displayed at the external control station visible. This ensures that the screed operator can check the process parameters of the paving screed provided at the external control station at the operating panel and / or displayed on the display even when not directly at the external control station. This enables the screed operator to monitor the paving process more effectively, and other site personnel, such as the paver operator and the supervisor of the paving team, can also see the projected process parameters. This automatically implements the multi-eye principle to ensure quality.

[0011] The process parameters can be projected onto the projection area in the form of numerical values, letter strings and / or symbols in the optically visible range. Optionally, the projected numerical values can be supplemented by international unit (SI unit) characters, such as length specifications, frequency units and / or temperature units.

[0012] It is conceivable to project the provided and / or detected process parameters intermittently onto the projection area in order to better indicate a fault state as a warning signal. A variant provides that the projected process parameters can change their color, indicating a setpoint or a non-setpoint installation value in different colors. It is also possible to color-adjust the projection depending on the detected weather conditions or the lighting conditions at the installation site.

[0013] Preferably, the projector is adapted to project the process parameters onto the paving layer produced by the road paver. This enables the personnel in the area of the paving screed to visually check the newly paved layer in order to identify the paving process parameters used to produce the paving layer.

[0014] One embodiment of the application provides that the projector is adapted to project the process parameters onto a projection area formed on the road paver. In this variant, the road paver itself, i.e. its vehicle and / or the screed body, is used as a projection area for imaging the process parameters. It can be advantageous to directly image the process parameters on the surface of the road paver, in particular under certain weather conditions.

[0015] A practical variant provides that the paving screed forms a projection area for displaying process parameters. The paving screed provides a sufficiently large surface which can advantageously be used as a projection area. The projected process parameters are clearly visible to the screed operator, to other personnel of the road paving machine, for example the vehicle driver, in order to better focus on the production parameters of the new paving layer.

[0016] Preferably, the paving screed has a base screed body and a laterally extendable extension unit attached thereto for varying the paving width, the projection area being arranged on the top cover of the base screed body. The top cover of the base screed body forms an excellent projection area on which the process parameters are projected. Here, the projected process parameters remain in the field of view even if the screed operator changes to the opposite side of the external operating platform.

[0017] Advantageously, the process parameters of the base screed body and / or the extension unit attached thereto, which are arranged and / or displayed on the external control station, can be displayed on the projection area, independently of where the projection area is located. Thus, the operation of the screed can be better monitored by the projection on the entire paving width.

[0018] It is conceivable that the projector can be configured to display the process parameters on the projection area formed by the road paving machine and on the projection area formed by the paving layer. In this case, the road paving machine and the resulting paving layer form at least one projection area for the projector, respectively.

[0019] A purposeful embodiment provides that the projector is configured to automatically adjust the position of the projection area depending on the detected position of the screed operator. For example, the position detection system of the road paving machine can track the movements of the screed operator, and then the projector will automatically move the position of the projection area so that the screed operator, regardless of his position in the area of the paving screed, can check the projected information on the projection area as the projection area moves relative to the detected position of the operator.

[0020] A variant provides that the road paving machine has a layer thickness measuring device, for example in the form of a measuring rod attached to the side of the road paving machine, for determining the thickness of the resulting paving layer, and the projector is attached to the layer thickness measuring device. It is conceivable that the projector is configured to project the layer thickness of the resulting paving layer, which is measured by the layer thickness measuring device, onto the projection area. This will allow the detected layer thickness to be displayed on the display of the external control station and in a separate location, i.e. directly on the road paving machine and / or on the new paving layer, for the site personnel.

[0021] Preferably, the roof structure of the road paver has an operator protection roof to which the projector is attached. From this height, the projection area provided for the process parameters can be adjusted very easily. It would be very useful if the projector is integrated in a thermal imaging camera module attached to the operator protection roof.

[0022] A preferred variant is to mount the projector on a rear carrying strut of the roof structure. It is conceivable to attach the projector to a carrying strut of the roof structure which is located directly behind the driver's seat in the paving direction. In one embodiment, the projector is integrated in the carrying strut, so that the carrying strut serves as a protective housing for the projector accommodated therein. It is also conceivable to attach one projector to each of the left and right carrying struts of the roof structure.

[0023] One embodiment of the application provides that the control device mounted on the external control station of the paving screed comprises the projector. In this case, the control device of the external control station of the paving screed itself serves as a carrier 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] Preferably, the projector can be controlled by the 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. Preferably, one of the optical modules of the projector can be adjusted by the control device of the external control station of the paving screed. This allows, for example, to change the sharpness of the projected process parameters. It is conceivable that various imaging effects of the projector can be controlled by the control device of the external control station.

[0025] A preferred variant provides that the external control station, in particular the control device provided thereon for controlling the paving screed, has a presence detection unit for detecting the distance of the screed operator to the control device, the projector projecting the process parameters to the projection area if the screed operator is not detected within a predetermined distance. Thus, the operation of the projector can be activated and deactivated depending on the measured distance between the control device and the screed operator.

[0026] A variant provides that the projector is movably mounted on the road paver, so that the position of the projection area can be changed. This allows, for example, to adjust the projection area used on the paver and / or the paving layer depending on which side of the paving screed the paver operator travels along the paving screed during the paving operation.

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

[0028] For example, the paving thickness, the paving width and / or the temperature of the paving layer produced can be visually displayed on the projection area. It is conceivable that at least one compaction unit setting, for example the tamper speed and / or the tamper stroke length, can be imaged on the projection area.

[0029] The invention also relates to a method for a road paver for projecting at least one process parameter provided and / or displayed on an external control station of a paving screed onto a projection area by means of a projector provided on the road paver. Preferably, the projector projects the process parameter on a projection area formed directly on the road paver and / or on a paving layer produced by the road paver. The process parameter provided and / or displayed on the paving screed of the road paver is thus more controllable for the site personnel. BRIEF DESCRIPTION OF DRAWINGS

[0030] In the following, advantageous embodiments of the invention are explained in more detail by means of the drawings:

[0031] Figure 1 a perspective view of a road paver according to the invention is shown,

[0032] Figure 2 a control device of an external control station of a paving screed is shown,

[0033] Figure 3 a road paver and a projection area on a paving layer to reproduce a projected process parameter are shown,

[0034] Figure 4 a paving screed with a base screed body and an extendable extension unit extendable to the side is shown,

[0035] Figure 5 a paving screed with a base screed body, a laterally extendable extension unit and an additional component attached thereto is shown, and

[0036] Figure 6 a road paver with a layer thickness measuring device and a projector attached thereto is shown.

[0037] In the figures, identical parts are consistently labeled with the same reference numerals. DETAILED DESCRIPTION

[0038] Figure 1A road paver 1 for producing paving layer B is shown. The road paver 1 includes a chassis 2 and a screed 3, which is mounted for height adjustment and dragged along the travel direction R to compact paving material E, which is supplied from the hopper 4 of the road paver 1 onto the screed 3. In addition, the road paver 1 is equipped with a canopy structure 5 with an operator protective canopy 6, the rear of which is supported by a left support strut and right support struts 21a, 21b when viewed from the travel direction R.

[0039] Figure 1 A projector 7 attached to the operator protective canopy 6 is shown. Here, the projector 7 is part of a thermal imaging camera K, adapted to detect thermal images of the newly laid paving layer B. The paving screed 3 includes lateral external control stations 8, 8' for the screed operator. Each external control station 8, 8' has control devices 9, 9' configured for inputting and displaying process parameters of the paving screed 3. Each control device 9, 9' is attached to laterally extendable extension units 10, 10' of the paving screed 3, such that the operator can always operate the control devices 9, 9' from the side of the produced paving layer B.

[0040] Figure 2 Show Figure 1 An enlarged view of the control device 9 of the external control station 8. The control device 9' of the corresponding external control station 8' can also be formed accordingly.

[0041] exist Figure 2 In the control device 9, there are an operation panel 11 for setting process parameters P and a display 12 for displaying process parameters P. The display 12 allows the screed operator to simultaneously display the set process parameters P and the detected process parameters P' during the paving stroke at the construction site, so the screed operator can monitor the production process of the new paving layer B on the display 12.

[0042] Figure 2 To illustrate schematically, control device 9 may include data from... Figure 1 The projector 7 may include an additional projector 7'. The process parameters P, P', which are directly set and / or displayed at the control device 9, can then be seamlessly transmitted to the projectors 7, 7' of the control device 9. Furthermore, Figure 2 A schematic diagram of a voice control module 40 is shown, which can be used to control the operation of the control device 9, particularly the projectors 7 and 7'.

[0043] Figure 1 and Figure 2 The projectors 7 and 7' shown are configured to... Figure 2 Set and / or on the operation panel 11 Figure 2at least one of the process parameters P, P' shown on the display 12 is projected onto at least one projection area 13, 13' (see Figure 3 ), so that the projected process parameters P, P' are visible to the screed operator of the paving screed 3.

[0044] In Figure 3 the projection areas 13, 13' for imaging the process parameters P, P' are shown. In particular, the projector 7 can be formed to project the process parameters P, P' onto the paving layer B produced by the road paver 1, which is schematically shown by the projection area 13. Furthermore, Figure 3 it is shown that the projector 7 can alternatively or additionally be formed to project the process parameters P, P' directly on the projection area 13' on the road paver 1, i.e. the road paver 1 itself is configured to form the projection area 13'.

[0045] Figure 3 It is shown that the paving screed 3 forms the projection area 13' for imaging the process parameters P, P'. In particular, Figure 3 the paving screed 3 in Figure 3 has a base screed body 14 to which the laterally extending units 10, 10' for changing the paving width are attached. As is shown, the projection area 13' is formed on the roof 15 of the base screed body 14.

[0046] Figure 3 It is shown in dashed lines that the projector 7 can be attached to one of the carrying struts 21a, 21b as an alternative to the shown attachment on the operator protection canopy 6, but mainly to the carrying struts 21a, 21b, which are located directly behind the driver's seat 22.

[0047] Figure 3 The arrows A, A' shown schematically in Figure 3 indicate the optional (e.g. depending on the position of the screed operator) adjustability of the respective projection area 13, 13'. For example, in Figure 2 , if the screed operator changes from the right side (seen in the direction of travel R) of the paving screed 3, i.e. from the external operating station 8 located there, to the opposite left side to the external operating station 8', the projection area 13, 13' can be moved to the opposite external control station 8'. The side can be changed by means of the footboard 16 and the change of side can be detected by means of the presence detection unit 20 (see ) of the control device 9, 9'.

[0048] Figure 4A paving screed 3 is shown with an extension unit 10, 10' extending to the side. It is clear that the respective outer control station 8, 8' is further laterally spaced apart from the base screed body 14 to produce a larger paving width. In Figure 4 the projection area 13' on the roof 15 of the base screed body 14. The process parameters P, P' projected on the projection area 13' can then be controlled by the operator standing behind the base screed body 14 and centered on the foot pedal 16. Likewise, the process parameters P, P' projected onto the projection area 13' remain fully visible for the driver.

[0049] Figure 5 A paving screed 3 is shown with an extension unit 10, 10' extending to the side. It is clear that the respective outer control station 8, 8' is further laterally spaced apart from the base screed body 14 to produce a larger paving width. In

[0050] Figure 6 A road paver 1 is shown with a transversely mounted layer thickness measuring device 30 for determining the layer thickness of the paving layer B. The layer thickness measuring device 30 is attached to the drawbar 19 for the paving screed 3. The layer thickness measuring device 30 has a beam portion 31 which is located behind the paving screed 3 and above the newly produced paving layer B. The projector 7 is attached to the beam portion 31 in order to project the process parameters P' set and / or displayed on the outer control station 8, for example the layer thickness measured by the layer thickness measuring device 30, on the projection area 13.

[0051] The invention is very suitable for the visualization of the process parameters P, P' set and / or displayed at the outer control station 8, 8', for which the possible option for the construction site operator is to isolate this in addition to the display at the control device 9, 9' by projection on the projection area 13, 13'. This can improve the quality control of the produced paving layer B.

Claims

1. Road paver (1) for producing a paving layer (B), comprising a chassis (2) and a paving screed (3) mounted in height-adjustable manner for compacting paving material (E), the paving screed (3) having at least one external control station (8, 8') with a control device (9, 9'), the control device (9, 9') having at least one operating panel (11) for setting process parameters (P, P') of the paving screed (3) and / or at least one display (12) for displaying process parameters (P, P') set on the operating panel (11), characterized in that at least one projector (7, 7') formed to project at least one of the process parameters (P, P') set on the operating panel (11) and / or displayed on the display (12) onto at least one projection area (13, 13') so that the process parameters (P, P') projected onto the projection area are visible to the screed operator of the paving screed (3), wherein the projected process parameters (P, P') are at least one set and / or detected compaction unit setting of the paving screed (3); the projector (7, 7') is adapted to project the process parameters (P, P') onto a first projection area (13) formed by the generated paving layer (B) and the paving screed (3) forms a second projection area (13') for imaging the process parameters (P, P').

2. The road paver of claim 1, wherein, The paving screed (3) comprises a base screed body (14) and a laterally extendable extension unit (10, 10') attached to the base screed body (14) for changing the paving width, wherein the second projection area (13') is arranged on an upper cover (15) of the base screed body (14).

3. Road paver (1) for producing a paving layer (B), comprising a chassis (2) and a paving screed (3) mounted in height-adjustable manner to compact paving material (E), the paving screed (3) having at least one external control station (8, 8') with a control device (9, 9'), the control device (9, 9') having at least one operating panel (11) for setting process parameters (P, P') of the paving screed (3) and / or at least one display (12) for displaying process parameters (P, P') set on the operating panel (11), characterized in that at least one projector (7, 7') formed to project at least one of the process parameters (P, P') set on the operating panel (11) and / or displayed on the display (12) onto at least one projection area (13, 13') so that the process parameters (P, P') projected onto the projection area are visible to the screed operator of the paving screed (3), wherein the projected process parameters (P, P') are at least one set and / or detected compaction unit setting of the paving screed (3); the paving screed (3) forms a second projection area (13') for imaging the process parameters (P, P').

4. The road paver of claim 3, wherein, The paving screed (3) comprises a base screed body (14) and a laterally extendable extension unit (10, 10') attached to the base screed body (14) for changing the paving width, wherein the second projection area (13') is arranged on an upper cover (15) of the base screed body (14).

5. The road paver of any one of claims 1 to 4, characterized in that, The road paver (1) comprises a layer thickness measuring device (30) for determining the layer thickness of the generated paving layer (B), to which the projector (7, 7') is attached.

6. The road paver of any one of claims 1 to 4, characterized in that, The road paver (1) comprises a roof structure (5), to the load-bearing struts (21a, 21b) of which the projector (7, 7') is fixed or which is arranged on the operator protection roof (6) as a component part of the heat imaging camera (K) mounted thereon.

7. The road paver of any one of claims 1 to 4, characterized in that, The control device (9, 9') mounted on the outer control station (8, 8') of the paving screed (3) comprises a projector (7, 7').

8. The road paver of any one of claims 1 to 4, characterized in that, The projectors (7, 7') are controllable by the control device (9, 9') of the external control station (8, 8').

9. The road paver of any one of claims 1 to 4, characterized in that, The control device (9, 9') comprises a voice control module (40) by which the operation of the projectors (7, 7') is controllable.

10. The road paver of any one of claims 1 to 4, characterized in that, The paving screed (3) comprises at least one detection unit, the projectors (7) being configured to visually image on the projection area (13, 13') process parameters (P, P') of the paving screed (3) detected by the detection unit during the operation of the paving screed (3).

11. The road paver of claim 10, wherein, The process parameters (P, P') are detected paving thickness, paving width and / or temperature.

12. Method for a road paver (1) for projecting at least one process parameter (P, P') that is set and / or displayable at an external control station (8, 8') of a paving screed (3) onto a projection area (13, 13') by means of a projector (7, 7') arranged on the road paver (1), characterized in that The second projection area (13') is formed by the paving screed (3) and / or the first projection area (13) is formed by the generated paving layer (B), and wherein the process parameters (P, P') projected onto the projection area are visible to the screed operator of the paving screed (3). The projectors (7, 7') are controllable by the control device (9, 9') of the external control station (8, 8'). The control device (9, 9') comprises a voice control module (40) by which the operation of the projectors (7, 7') is controllable. The paving screed (3) comprises at least one detection unit, the projectors (7) being configured to visually image on the projection area (13, 13') process parameters (P, P') of the paving screed (3) detected by the detection unit during the operation of the paving screed (3). The process parameters (P, P') are detected paving thickness, paving width and / or temperature. The second projection area (13') is formed by the paving screed (3) and / or the first projection area (13) is formed by the generated paving layer (B), and wherein the process parameters (P, P') projected onto the projection area are visible to the screed operator of the paving screed (3).

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