Tow point index

Patent metadata

Field	Value
Publication number	US-11572662-B2
Application number	US-202117220216-A
Country	US
Kind code	B2
Filing date	Apr 1, 2021
Priority date	Apr 1, 2021
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

An asphalt paver may include a tractor and a screed configured for towing behind the tractor. The screed may include a tow arm secured to the tractor at an adjustable tow point. The paver may also include a monitoring system configured for monitoring and displaying the position of the adjustable tow point. The monitoring system may include a sensor arranged at or near the tow point for sensing the position of the tow point and a computing system in communication with the sensor for displaying the position of the adjustable tow point. A method of paving involving adjusting paving parameters to avoid or compensate for movement in the tow point is also provided.

First claim

What is claimed is:

1. An asphalt paver, comprising:
a tractor;
a screed configured for towing behind the tractor, the screed comprising a tow arm secured to the tractor at an adjustable tow point; and
a monitoring system configured for monitoring and displaying the position of the adjustable tow point and comprising:
a sensor arranged at or near the tow point for sensing the position of the tow point; and
a computing system in communication with the sensor for displaying the position of the adjustable tow point.

2. The paver of claim 1 , wherein the position of the adjustable tow point is in the form of a tow point index.

3. The paver of claim 2 , wherein the tow point index defines a position relative to a reference position.

4. The paver of claim 2 , further comprising an automatic parameter adjuster configured work in conjunction with the monitoring system to reduce or minimize movement of the tow point by adjusting a parameter of the asphalt paver.

5. The paver of claim 4 , wherein the parameter is at least one of paving speed and conveyor rate.

6. The paver of claim 4 , wherein the automatic parameter adjuster is configured to function in response to the tow point index.

7. The paver of claim 4 , wherein the automatic parameter adjuster is configured to look for inconsistencies in the paving conditions and function preemptively to avoid changes in the tow point index.

8. The paver of claim 7 , wherein automatic parameter adjuster comprises a machine learning component that identifies patterns relating paving conditions to changes in paving parameters and adjusts a paving parameter based on one or more of the patterns.

9. The paver of claim 1 , wherein the tow point index comprises a plurality of indices.

10. The paver of claim 9 , wherein the plurality of indices comprises a left index, a right index, and a combined index.

11. The paver of claim 10 , wherein the combined index comprises an average of the left index and the right index.

12. A method of operating an asphalt paver, comprising:
operating the asphalt paver to receive loose asphalt, deliver the loose asphalt to the grade in front of a screed, and pull the screed to form an asphalt mat, the operating comprising setting and/or adjusting an operating parameter including at least one of paver speed and conveyor delivery rate; and
continually receiving a tow point index from a monitoring system and adjusting the operating parameter to limit fluctuations in the tow point index.

13. The method of claim 12 , wherein when the tow point index goes down, adjusting the operating parameter comprises reducing the paving speed or increasing the conveyor delivery rate.

14. The method of claim 12 , wherein adjusting the operating parameter is performed automatically.

15. The method of claim 12 , wherein adjusting the operating parameter comprises identifying a pattern relating paving conditions to changes in paving parameters and adjusting a paving parameter based on one or more of the patterns.

16. The method of claim 12 , wherein the tow point index comprises a tow point position relative to a reference position.

17. The method of claim 16 , wherein the tow point index comprises a plurality of indices including a left index, a right index, and a combined index.

18. The method of claim 17 , wherein adjusting the operating parameter comprises adjusting the operating parameter responsive to changes in the tow point index.

19. The method of claim 18 , wherein adjusting the operating parameter comprises adjusting the operating parameter preemptively to avoid changes in the tow point index.

20. The method of claim 17 , wherein adjusting the operating parameter is performed based on differing indices on a left side and a right side of the paver.

Assignees

• Caterpillar Paving Products Inc

Inventors

• Mansell Todd W
• Anderson Jonathan A

Classifications

• E01C19/004 Primary

  Devices for guiding or controlling the machines along a predetermined path (for graders or bulldozers E02F3/841; for other soil-shifting machines E02F9/2045) · CPC title

• E01C19/48 Primary

  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 (E01C19/002, E01C23/065 take precedence; devices for guiding or controlling the machines along a predetermined path E01C19/004)} · CPC title

• G01D21/02

  Measuring two or more variables by means not covered by a single other subclass · CPC title

• G06N20/00

  Machine learning · CPC title

• E01C23/01

  Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed {or reference line} supports (form rails E01C19/50); Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs (E01C23/07 takes precedence; measuring roughness or irregularity in general G01B) · CPC title