US20240003103A1 - Road finisher and method for controlling its operation - Google Patents

Road finisher and method for controlling its operation Download PDF

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Publication number
US20240003103A1
US20240003103A1 US18/217,358 US202318217358A US2024003103A1 US 20240003103 A1 US20240003103 A1 US 20240003103A1 US 202318217358 A US202318217358 A US 202318217358A US 2024003103 A1 US2024003103 A1 US 2024003103A1
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United States
Prior art keywords
height
tractor
maximum value
screed
road finisher
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Pending
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US18/217,358
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English (en)
Inventor
Jens Herrmann
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Joseph Voegele AG
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Joseph Voegele AG
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Assigned to JOSEPH VOEGELE AG reassignment JOSEPH VOEGELE AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HERRMANN, JENS
Publication of US20240003103A1 publication Critical patent/US20240003103A1/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/004—Devices for guiding or controlling the machines along a predetermined path
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • E01C19/4866—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely non-vibratory or non-percussive pressing or smoothing means for consolidating or finishing

Definitions

  • the disclosure relates to road finishers having automatic leveling systems and to methods for controlling the operation of such pavers.
  • Road pavers which comprise a screed for compacting paving materials, such as asphalt, and a tractor for towing this screed.
  • the screed is usually mounted on the tractor so as to pivot about a towing point.
  • the height of the towing point can be adjustable, for example, by using a hydraulic cylinder.
  • a so-called tar machine is known from DE 10 2011 001 542 A1.
  • a trowel bar is disclosed, which is attached to the machine at a drag point.
  • the lifting of this drag point can be adjusted by a drag point cylinder.
  • the amount of adjustment that can be made over a distance of 5 m traveled by the machine is to be limited to 3 mm.
  • a calculated lift/lower value is to be adjusted by the cylinder only if it is higher than 1 mm.
  • the disclosed control is based on the assumption that on a travel distance of 5 m the drag point cylinder may never be adjusted by more than 3 mm.
  • a road finisher which comprises a tractor and a material hopper, which is disposed at the front of the tractor as seen in the driving direction and which is configured to receive material.
  • the road finisher further comprises a screed, which is mounted to the tractor by towing arms so as to be pivotable around a towing point, such that the screed is towable behind the tractor as seen in the driving direction, and a control system comprising a height detection device, which is configured to generate a height signal, and an adjusting cylinder, the adjusting cylinder being connected to the tractor and one of the towing arms and being configured to adjust a height of the towing point relative to the tractor.
  • the control system is configured to compare the height signal to a target value and thereby calculate a control deviation, to limit an adjustment displacement, in particular an implemented adjustment displacement, of the adjusting cylinder to a maximum value based on the control deviation, wherein the maximum value is proportional to the control deviation, and the control system being further configured to adjust the adjusting cylinder based on the control deviation and taking the maximum value into account.
  • the height detection device may be configured to detect vertical movements of the screed with respect to a height reference and preferably generate the height signal based on said detection.
  • a wire reference, a curb edge, an edge of a previously laid asphalt layer or a laser beam may be used as a height reference.
  • the height detection device may be configured to detect the respective height reference and comprise a height sensor, such as a sensing arm, and an ultrasound sensor, a camera or a laser sensor.
  • a height detection device having a laser sensor may be configured to detect a laser beam as a height reference and or to recognize an edge by generating and detecting a line laser. In particular in case of the latter, the height detection device may comprise its own laser source.
  • the height detection device may comprise one or several inclination sensors.
  • the inclination sensor may be configured to detect an inclination, in particular a transverse inclination, of the screed.
  • Several inclination sensors may for example be configured to detect the inclination of screed parts of the screed.
  • a length in particular a length defined transverse with respect to the driving direction, of the screed or of a screed part of the screed, whose inclination is detected by the inclination sensor, may be taken into account. This may enable to convert an angular signal into a height signal, preferably a vertical height signal.
  • the height of the screed may be controllable manually on one side.
  • the height on the opposite side of the screed with respect to the driving direction may then be controllable by a height detection device having inclination sensors as explained in more detail further above.
  • the height detection device may comprise a processing unit.
  • the processing unit may be configured to generate the height signal based on an output of one or several of the previously mentioned sensors, in particular of a height sensor, a sensing arm, an ultrasound sensor, a camera, a laser sensor and in inclination sensor.
  • a height signal may in particular be generated based on an output of a height sensor and one or several inclinations sensors, for example by adding the height signals generated according to the above explanations.
  • the limiting of the adjustment displacement to a maximum value may enable an automatic adaption of the maximum value to the respective paving situation.
  • undesirable effects of the inertia in the control path such as overshoot or excessive oscillation, may be prevented. It may occur that a change of the towing point only affects the height as measured by the height detection device after a delay.
  • the adjustment displacement may undesirably increase or decrease, respectively, because of a control deviation persisting for a longer time.
  • the adjustment displacement may also be limited enough to minimize effects on the paving result.
  • the control system may comprise suitable electronic parts.
  • individual assemblies or parts each may execute one or several of the functions mentioned. It is conceivable, that a central control system of the road finisher executes this function.
  • the maximum value is defined relative to a reference value.
  • a certain extension position of the adjusting cylinder may be considered as a reference value.
  • the reference value may be defined as an extension position, which is extended by 160 mm with respect to a completely retracted position of the adjusting cylinder. If, in this case, an adjustment displacement is limited to a maximum value of 5 mm relative to the reference value, the adjustment of the adjusting cylinder may be limited to extension positions in a range between 155 mm and 165 mm.
  • the reference value is adjustable by an operator. This may in particular be useful at the beginning of a paving drive, for example to provide an initial reference value. It is particularly beneficial, if the control system is configured to automatically adapt the reference value. It may for example be provided that the reference value is automatically adapted, when the control system recognizes that it is in a steady-state. A state, in which the height signal matches the target value and or the control deviation is 0, close to 0 or smaller than 2 mm, may be considered a steady-state. In this way, the reference value may be adapted to a changing extension position.
  • the maximum value is given by multiplication of the control deviation by a proportionality factor, for example 2.
  • the proportionality factor may for example be adjustable by an operator of the road finisher.
  • a top limit is defined for the maximum value.
  • an extension range of the adjusting cylinder may be accounted for, i.e., an extension of the adjusting cylinder to its end stops may be avoided.
  • the top limit may be defined depending from the reference value, in particular the currently set reference value. For example with a maximum possible extension position of the adjusting cylinder of 200 mm and a currently set reference value of 150 mm, the top limit for the maximum value may be 45 mm, in order to prevent the adjusting cylinder being stopped at its end position.
  • the road finisher comprises a tractor, a material hopper, which is disposed at the front of the tractor as seen in the driving direction and which is configured to receive material, a screed, which is mounted to the tractor by towing arms so as to be pivotable around a towing point such that the screed is towable behind the tractor as seen in the driving direction, and a control system having a height detection device and an adjusting cylinder connected to the tractor and one of the towing arms.
  • the method comprises generating a height signal by the height detection device, calculating a control deviation by comparing the height signal to a target value, limiting an adjustment displacement of the adjusting cylinder to a maximum value, which is proportional to the control deviation, calculating an adjustment signal based on the control deviation taking the maximum value for the adjustment displacement into account and adjusting a height of the towing point by the adjusting cylinder based on the adjustment signal.
  • the method further comprises detecting a movement of the screed with respect to a height reference by the height detection device, wherein the height signal is preferably generated based on the detected movement of the screed with respect to the height reference.
  • the adjustment displacement may be limited enough such that the effects on the paving result may be minimized.
  • the control system may comprise suitable electronic parts and or assemblies. Here, individual assemblies or parts each may execute one or several of the mentioned functions. It is conceivable that a central control of the road finisher executes these functions.
  • the maximum value is defined relative to a reference value.
  • a certain extension position of the adjusting cylinder may be considered a reference value.
  • the reference value is adjustable by an operator. As explained further above, this may be particularly useful at the beginning of a paving drive, for example in order to provide an initial reference value. It is particularly advantageous, if the method comprises an automatic adaption of the reference value by the control system. For example, it may be provided that the reference value is adapted automatically when the control system recognizes that it is in a steady-state. In this way, the reference value may be adapted to a changing extension position.
  • the maximum value is given by multiplication of the control deviation by a proportionality factor, for example 2.
  • the proportionality factor may, for example, be adjustable by an operator of the road finisher.
  • a top limit of the maximum value is defined. As explained further above, in this way, an extension range of the adjusting cylinder may be accounted for, i.e., an extension of the adjusting cylinder to its end stops may be avoided.
  • the top limit may be defined depending from the reference value, in particular the currently set reference value.
  • the disclosure relates to a road finisher as well as a method of the type explained above.
  • an advantageous embodiment will be explained as an example using drawings.
  • FIG. 1 shows a schematic side view of a road finisher
  • FIG. 2 shows a schematic perspective view of a road finisher during a paving drive guided by a height reference
  • FIG. 3 shows a schematic view of components of a control system of a road finisher.
  • a road finisher 1 is shown in a schematic side view.
  • the road finisher 1 may comprise a tractor 2 .
  • the road finisher 1 may further comprise a material hopper 3 .
  • the material hopper 3 may be disposed at the front of the tractor 2 as seen in a driving direction R.
  • the material hopper 3 may further be configured to receive material 4 (see FIG. 2 ).
  • the road finisher 1 may further comprise a screed 5 .
  • the screed 5 may be mounted to the tractor 2 by towing arms 6 .
  • the screed 5 may be mounted to the tractor 2 so as to be pivotable around a towing point 7 .
  • the tractor 2 may be configured to tow the screed, preferably floatingly, on an asphalt layer to be compacted.
  • the road finisher 1 may further comprise an adjusting cylinder 8 .
  • the adjusting cylinder 8 may on one side be connected to the tractor 2 .
  • the adjusting cylinder 8 may, on another side, be connected to the towing arms 6 , in particular at the towing point 7 .
  • the adjusting cylinder 8 may be configured to adjust a height of the towing point 7 with respect to the tractor 2 .
  • the road finisher 1 is shown in a schematic perspective view from the front and above. Further, FIG. 2 schematically shows a plane, on which an asphalt layer is to be laid, as well as a height reference 9 .
  • the height reference 9 may be a reference wire.
  • the road finisher 1 may comprise a height detection device 10 .
  • the height detection device 10 may be an ultrasound sensor, which may be configured to detect the reference wire 9 .
  • the height detection device 10 may be fixed to the screed 5 and/or the towing arm 6 . In this way, the height detection device 10 may be configured to detect substantially vertical movements of the screed 5 with respect to the height reference 9 .
  • the road finisher 1 may comprise a control system 11 , which will be explained in more detail in the following with reference to FIG. 3 .
  • FIG. 3 shows a schematic diagram to illustrate the functioning of the control system 11 .
  • the control system 11 may comprise the height detection device 10 .
  • the control system 11 may further comprise the adjusting cylinder 8 .
  • the height detection device 10 may be configured to generate a height signal 12 based on the detection of the height reference 9 .
  • the height signal 12 may represent in particular a height of the screed 5 above the plane.
  • the control system 11 may be configured to compare the height signal 12 to a target value 13 .
  • the control system 11 may further be configured to calculate a control deviation 14 based on the comparison of the target value 13 to the height signal 12 .
  • the control system 11 may further comprise a calculation unit 15 .
  • the calculation unit 15 may be configured to calculate a raw adjustment signal 16 based on the control deviation 14 . Further, the control system 11 may be configured to calculate a maximum value 17 based on the control deviation 14 .
  • the control system 11 may further comprise a limiter unit or limiter 18 .
  • the limiter 18 may be configured to adjust an adjustment signal 19 sent to the adjusting cylinder 8 in such a way that an implemented adjustment displacement 20 of the adjusting cylinder 8 is suitably limited, in particular to the calculated maximum value 17 .
  • the limiter may be configured to generate adjustment signal 19 based on the raw adjustment signal 16 as well as the maximum value 17 .
  • a reference value 21 may additionally be taken into account. If the reference value 21 is not taken into account during generation of the adjustment signal 19 , the adjustment signal 19 may represent an adjustment displacement to be implemented by the adjusting cylinder 8 . Based on the adjustment signal 19 , the adjusting cylinder 8 may then be adjusted by the adjustment displacement to be implemented. If the reference value 21 is taken into account, the adjustment signal 19 may represent an extension position of the adjusting cylinder 8 . In the latter case, the adjusting cylinder 8 may be configured to implement the extension position to be implemented based on the adjustment signal 19 transmitted to the adjusting cylinder 8 . In both variants, the implemented adjustment displacement of the adjusting cylinder 8 may be limited to the maximum value 17 . A difference is in the kind of control of the adjusting cylinder 8 .
  • the maximum value 17 may be proportional to the control deviation 14 and may preferably be calculated by multiplying the control deviation 14 by a proportionality factor 22 .
  • the proportionality factor 22 may be adjustable, in particular by an operator of the road finisher 1 .
  • the maximum value 17 may for example be twice the control deviation 14 .
  • the reference value 21 may be adjustable by an operator.
  • the control system 11 may be configured to adapt the reference value 21 automatically. For example, it is conceivable that at the beginning of a paving drive, the reference value 21 is set by an operator and is continuously autonomously adjusted by the control system 11 .
  • any units or devices shown in FIG. 3 may be understood as logical units. These may be implemented as electronic circuits, in software or as a mix of the two. In particular, the height detection device 10 may be implemented as a combination of electronic circuits and software.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
US18/217,358 2022-07-04 2023-06-30 Road finisher and method for controlling its operation Pending US20240003103A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22182719.9 2022-07-04
EP22182719.9A EP4303365B1 (de) 2022-07-04 2022-07-04 Strassenfertiger und verfahren zum regeln des betriebs

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US20240003103A1 true US20240003103A1 (en) 2024-01-04

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US18/217,358 Pending US20240003103A1 (en) 2022-07-04 2023-06-30 Road finisher and method for controlling its operation

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US (1) US20240003103A1 (https=)
EP (1) EP4303365B1 (https=)
JP (1) JP2024007525A (https=)
CN (2) CN117344601A (https=)
BR (1) BR102023013094A2 (https=)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4303365B1 (de) * 2022-07-04 2026-03-11 Joseph Vögele AG Strassenfertiger und verfahren zum regeln des betriebs

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JP2019132116A (ja) * 2017-12-13 2019-08-08 ヨゼフ フェゲーレ アーゲー ロードフィニッシャに設置されたレベリングシリンダの調節
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EP4083322A1 (en) * 2021-04-27 2022-11-02 Leica Geosystems AG System and method for controlling a road construction process
US11560675B2 (en) * 2019-05-14 2023-01-24 Joseph Voegele Ag Road finisher and method for determining the layer thickness of a paving layer produced
DE102022201294A1 (de) * 2022-02-08 2023-08-10 Moba Mobile Automation Aktiengesellschaft Nivelliersystem für eine Baumaschine
US20240301634A1 (en) * 2023-03-08 2024-09-12 Joseph Vögele AG Method and road construction system for dynamically controlling a paving speed of a road paver
US20250019913A1 (en) * 2023-07-14 2025-01-16 Joseph Vögele AG Road paver with leveling feedback control for a screed
US12385231B2 (en) * 2020-01-31 2025-08-12 Moba Mobile Automation Ag Measuring system and controller
US12435477B2 (en) * 2021-03-23 2025-10-07 Moba Mobile Automation Ag Measuring system

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PL3981918T3 (pl) * 2020-10-08 2024-07-15 Joseph Vögele AG Wykańczarka oraz sposób poziomowania deski równającej wykańczarki
EP4303365B1 (de) * 2022-07-04 2026-03-11 Joseph Vögele AG Strassenfertiger und verfahren zum regeln des betriebs

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7654769B2 (en) * 2007-08-16 2010-02-02 Joseph Voegele Ag Method and regulating system for producing a cover layer
US10094076B2 (en) * 2016-02-09 2018-10-09 Topcon Corporation Surveying instrument, surveying instrument usage method, and construction machine control system
JP2019132116A (ja) * 2017-12-13 2019-08-08 ヨゼフ フェゲーレ アーゲー ロードフィニッシャに設置されたレベリングシリンダの調節
US11060249B2 (en) * 2017-12-13 2021-07-13 Joseph Voegele Ag Adjustment of the leveling cylinder setting in a road finisher
US11560675B2 (en) * 2019-05-14 2023-01-24 Joseph Voegele Ag Road finisher and method for determining the layer thickness of a paving layer produced
CN111236017A (zh) * 2020-01-14 2020-06-05 三一汽车制造有限公司 摊铺机的自动行驶控制方法、控制系统和摊铺机
US12385231B2 (en) * 2020-01-31 2025-08-12 Moba Mobile Automation Ag Measuring system and controller
US12435477B2 (en) * 2021-03-23 2025-10-07 Moba Mobile Automation Ag Measuring system
EP4083322A1 (en) * 2021-04-27 2022-11-02 Leica Geosystems AG System and method for controlling a road construction process
DE102022201294A1 (de) * 2022-02-08 2023-08-10 Moba Mobile Automation Aktiengesellschaft Nivelliersystem für eine Baumaschine
US20240301634A1 (en) * 2023-03-08 2024-09-12 Joseph Vögele AG Method and road construction system for dynamically controlling a paving speed of a road paver
US20250019913A1 (en) * 2023-07-14 2025-01-16 Joseph Vögele AG Road paver with leveling feedback control for a screed

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Publication number Publication date
BR102023013094A2 (pt) 2024-03-12
JP2024007525A (ja) 2024-01-18
CN117344601A (zh) 2024-01-05
EP4303365B1 (de) 2026-03-11
EP4303365A1 (de) 2024-01-10
CN220977603U (zh) 2024-05-17

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