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BR-102021006565-B1 - Road finishing machine and method for operating it.

BR102021006565B1BR 102021006565 B1BR102021006565 B1BR 102021006565B1BR-102021006565-B1

Abstract

ROAD FINISHING MACHINE AND METHOD FOR OPERATING THE SAME. Road finishing machine (1) with a table (3), wherein the table (3) comprises at least one compaction unit (5, 7, 9), and the road finishing machine (1) further comprises a GNSS receiver (25) as well as a material conveyor (13). The road finishing machine (1) further comprises an electronic control system (19) comprising a memory (21) and a data processor (23), wherein in the memory (21), digital construction data (37), in particular a nominal height profile (43) of a road pavement (15) to be finished, are stored. The control system (19) is configured to automatically control, based on construction data (37), an actuator mechanism (17, 55, 61, 67) provided on the road finishing machine (1), in particular a leveling cylinder (17) and/or a transverse camber adjustment (55) and/or a slope adjustment (61) and/or a shoulder adjustment (67), in order to install the bedding material (11) with the nominal height profile (43) and thus a defined transverse profile for the respective position coordinate point (45) of the road finishing machine (1) determined with the GNSS receiver (25).

Inventors

  • Martin Buschmann
  • Ralf Weiser

Assignees

  • Joseph Vögele AG

Dates

Publication Date
20260317
Application Date
20210406
Priority Date
20200408

Claims (15)

  1. 1. Road finishing machine (1) with a table (3), wherein the table (3) comprises at least one compaction unit (5, 7, 9) and the road finishing machine (1) further comprises a GNSS receiver (25) as well as a material conveyor (13), wherein the road finishing machine (1) comprises an electronic control system (19) comprising a memory (21) and a data processor (23), characterized in that, in the memory (21), digital construction data (37), including a nominal height profile (43) of a road pavement (15) to be finished, are stored and the control system (19) is configured to automatically control, based on the construction data (37), an actuator mechanism (17, 55, 61, 67) provided in the road finishing machine (1), including a leveling cylinder (17) and/or a transverse camber adjustment (55) and/or a slope adjustment. (61) and/or a shoulder adjustment (67), to install bedding material (11) with the nominal height profile (43) and thus a defined cross-sectional profile for the respective position coordinate point (45) of the road finishing machine (1) determined with the GNSS receiver (25).
  2. 2. Road finishing machine (1), according to claim 1, characterized in that the control system (19) is configured to automatically control the steering system (35) of the road finishing machine (1) depending on the position.
  3. 3. Road finishing machine (1), according to claim 1 or 2, characterized in that the control system (19) is configured to automatically adjust the table width depending on the position.
  4. 4. Road finishing machine (1), according to any one of claims 1 to 3, characterized in that the table (3) comprises a side tilt sensor (53), wherein the control system (19) is configured to automatically control the actuator mechanism (17, 55, 61, 67) based on data received from the side tilt sensor (53).
  5. 5. Road finishing machine (1), according to any one of claims 1 to 4, characterized in that it comprises a sensor (57) for measuring an actual height profile (59), wherein the control system (19) is configured to calculate a deviation of the actual height profile (59) from the nominal height profile (43) and to automatically control the actuator mechanism (17, 55, 61, 67) in response thereto.
  6. 6. Road finishing machine (1), according to any one of claims 1 to 5, characterized in that the control system is configured to automatically adjust the actuator mechanism (17, 55, 61, 67) at the transition between two cross-sectional profiles.
  7. 7. Road finishing machine (1), according to any one of claims 1 to 6, characterized in that the control system (19) is configured to compare the actuator settings required for the installation of the nominal height profile (43) with its adjustment limits.
  8. 8. Road finishing machine (1), according to any one of claims 1 to 7, characterized in that the control system (19) is configured to compare the adjustment speeds of the actuators (17, 55, 61, 67) required for the installation of the nominal height profile (43) with the possible adjustment speeds.
  9. 9. Method for operating a road finishing machine (1) defined in any one of claims 1 to 8, characterized in that it comprises the following procedural steps: - storing digital construction data (37), including a nominal height profile (43) and a cross-sectional profile of a road pavement (15) to be finished defined therewith, in a memory (21) of an electronic control system (19) of the road finishing machine (1), - installing a bedding material (11) by means of a table (3) of the road finishing machine (1), wherein the respective current position of the road finishing machine (1) is determined by means of a GNSS receiver (25) and, with reference to the nominal height profile (43), an actuating mechanism (17, 55, 61, 67) provided in the road finishing machine (1), including a leveling cylinder (17) and/or a cross camber adjustment (55) and/or a slope adjustment (61) and/or a shoulder adjustment (67) is controlled automatically.
  10. 10. Method according to claim 9, characterized in that a lateral inclination of the table (3) and/or a part of the table (47, 49, 51, 63) is determined by means of one or more lateral inclination sensors (53).
  11. 11. Method, according to claim 9 or 10, characterized in that an actual height profile (59) of the installed road pavement (15) is determined by means of a sensor (57), and a difference between the actual height profile (59) and the nominal height profile (43) is calculated and the actuator mechanism (17, 55, 61, 67) is automatically controlled to minimize the difference.
  12. 12. Method, according to any one of claims 9 to 11, characterized in that the actuating mechanism (17, 55, 61, 67) is automatically adjusted in the transition between two cross-sectional profiles.
  13. 13. Method, according to any one of claims 9 to 12, characterized in that the digital construction data (37) are transmitted, at the beginning of the process, from an external data processing equipment (29) to the memory (21) of the electronic control system (19) by means of a radio or cable connection (31, 33).
  14. 14. Method, according to any one of claims 9 to 13, characterized in that, before the start of the installation, the actuator settings required for the installation of the nominal height profile (43) are compared with its adjustment limits.
  15. 15. Method, according to any one of claims 9 to 14, characterized in that, before the start of the installation, the required adjustment speeds of the actuators (17, 55, 61, 67) are compared with the possible adjustment speeds.

Description

[001] The present invention relates to a road finishing machine and a method for operating a road finishing machine. [002] Road surfaces are often constructed not only in a completely horizontal and flat manner, but also have a cross-sectional profile to achieve advantageous effects, such as improved rainwater drainage. For example, straight road sections are finished with a cross camber, i.e., they slope from a higher line in the center of the roadway on both sides outwards. Curves are made with a superelevation increasing from the inner to the outer radius of the curve. To be able to install such profiles with a road finishing machine, it is known so far to change the lateral slope of the screed as a whole and to slope sections of the screed separately. The adjustments are made by an operator, for example, by means of hydraulic adjustment of the leveling cylinders, or by manually actuatable adjustment nuts. A partially automatic control is known from document EP 0 849 399 B1. [003] The object of the present invention is to provide a road finishing machine with an improved control system for automatic cross-sectional profile control and an improved method for operating a road finishing machine. [004] The objective is achieved by a road finishing machine having the characteristics of claim 1 or by a method for operating a road finishing machine having the characteristics of claim 9. Further advantageous developments of the invention are stated in the dependent claims. [005] A road finishing machine according to the invention comprises a table, the table comprising at least one compaction unit. The road finishing machine further comprises a GNSS receiver, a material conveyor and an electronic control system which in turn comprises a memory and a data processor. In the memory, digital construction data is stored, in particular a nominal height profile of a road pavement to be finished. The control system is configured to automatically control, based on the construction data, an actuator mechanism provided in the road finishing machine, in particular a leveling cylinder and/or a transverse camber adjustment and/or a slope adjustment and/or a shoulder adjustment, to install the bedding material with the nominal height profile and thus a defined transverse profile for the respective position coordinate point of the road finishing machine determined with the GNSS receiver. This means that both the position of the entire table in space and the orientation of the individual table parts relative to each other can be adjusted. For example, the lateral tilt of the screed for installing a curve superelevation can be adjusted automatically. Similarly, the left and right halves of the screed can be automatically adjusted at an angle relative to each other to complete a cross camber. In addition to the main screed, add-on or detachable elements can be automatically adjusted; in particular, their transverse inclinations relative to the direction of travel can be automatically adjusted. The actuating mechanism can be, for example, hydraulic or electromotive actuators or drives. This means that cross profiles can be accurately planned using digital construction data and subsequently precisely installed with the road finishing machine based on the coordinates. Possible operator errors are eliminated, and the operator can then focus on other operational functions of the road finishing machine. [006] Preferably, the control system is configured to automatically control the steering system of the road finishing machine depending on its position. This ensures that the road pavement is installed in the exact intended position, which is particularly important on a profiled road surface, since the foundation and lateral transitions in the terrain are coordinated with it. By measuring the road finishing machine's position using GNSS, other reference systems, such as mechanical, laser-based, or visual monitoring by the operator, can be eliminated, but can still be employed additionally. With automatic steering system control, the operator is further relieved of work. [007] In an advantageous variant, the control system is configured to automatically adjust the screed width depending on the position. In this way, changes in the desired road pavement width are taken into account, while the operator is not additionally challenged or can simply monitor the automatic adjustments. The aforementioned, as well as the following, automatic functions of the road finishing machine can, based on and in conjunction with the digital construction data processed by the electronic control system, allow for an almost or totally autonomous laying of a road pavement. [008] Preferably, the table comprises a side tilt sensor, the control system being configured to automatically control the actuator mechanism based on data received from the side tilt sensor. The table may comprise a plurality of side tilt sensors, at least one of which is suitably fixed to e