Method for monitoring a working machine

Patent metadata

Field	Value
Publication number	US-11208302-B2
Application number	US-201716087843-A
Country	US
Kind code	B2
Filing date	Mar 23, 2017
Priority date	Mar 23, 2016
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

The invention relates to a method for monitoring a working machine, in particular a crane, which is equipped with two or more individual elements for use when in operation, wherein a working machine monitoring means unambiguously identifies one or more elements equipping the machine and determines their times of operation, and the determined time of operation of at least one of the element is transmitted together with identification information to storage means for establishing an operation log of the element.

First claim

The invention claimed is:

1. A method of monitoring a work machine assembled from two or more individual elements, comprising:
receiving information from connected elements of the assembled work machine at a monitoring device of the work machine, the information sent through the connected elements in series and comprising identifiers for the connected elements, and the connected elements modifying the information before the information is further transmitted;
automatically determining the position of the connected elements within the assembled work machine based on the modified information;
using the monitoring device of the work machine to: identify one or more of the connected elements, determine a length of use of one or more of the connected elements, and determine a load history of an individual connected element based on a position of the individual connected element within the assembled work machine, wherein the work machine is a crane; and
transmitting the determined length of use of at least one of the connected elements together with identification information of the at least one of the connected elements to a storage device for preparing a log of use of the at least one of the connected elements.

2. The method in accordance with claim 1 , wherein the storage device is within a central management unit that is connected or is connected communicationally to one or more monitoring devices of different work machines and/or that is attached to the connected elements.

3. The method in accordance with claim 1 , wherein the monitoring device is a component of a work machine control.

4. The method in accordance with claim 1 , further comprising determining a composition of the work machine based on determined positions of the connected elements, and
calculating or providing a load curve based on the determined composition of the work machine,
wherein the position of the connected elements is determined by the monitoring device during machine deployment and is transmitted to the storage device.

5. The method in accordance with claim 1 , wherein load collectives for at least some of the connected elements are determined by the monitoring device during machine deployment and are transmitted to the storage device.

6. The method in accordance with claim 1 , wherein an evaluation unit performs a load-induced state analysis of the connected elements using data stored in the storage device to assess their future load capability/rated capacity, with the evaluation unit and/or the monitoring device seeing an exact load of one of the connected elements per operational use with reference to tabular information.

7. The method in accordance with claim 6 , wherein the evaluation unit and/or the monitoring device sees an exact load of one or more of the connected elements per operational use with reference to detected installation position and further information describing work operation.

8. The method in accordance with claim 1 , wherein an evaluation unit performs an assessment of the profitability of one or more of the connected elements with reference to data stored in the storage device including one or more of: the stored lengths of use, the yields recorded and costs incurred, wherein costs incurred include one or more of a new purchase, a putting into operation, and a servicing.

9. The method in accordance with claim 8 , wherein a current configuration of the work machine is determined and checked for reliability by the monitoring device and/or by the evaluation unit.

10. The method in accordance with claim 9 , wherein data required for operation and dependent on assembly of the work machine are released and/or provided by the monitoring device and/or by the evaluation unit in dependence on the determined configuration.

11. The method in accordance with claim 10 , wherein the data required for operation and dependent on the assembly is a payload curve.

12. The method in accordance with claim 8 , wherein the monitoring device and/or the evaluation unit makes a check after assembly of the work machine whether all the connected elements are identifiable and in the event of an unidentifiable element, a piece of information is transmitted to the evaluation unit and/or a manual release of work operation by a machine operator is requested and/or a communication is output to the machine operator.

13. The method in accordance with claim 1 , wherein an identification of the connected elements takes place by means of encoded information that is present at the connected elements and that is transmitted via optical fibers and/or via contactless energy transmission between individual connected elements and/or between the connected elements and the monitoring device.

14. A work machine comprising:
one or more identifiable assembly elements, wherein the work machine is assembled from two or more individual elements;
connected elements of the work machine transmitting information in series through optical fibers to a monitoring device of the work machine, the information comprising identifiers for the connected elements, and the connected elements modifying the information before the information is further transmitted;
the monitoring device of the work machine:
identifying one or more of the connected elements,
determining a length of use of one or more of the connected elements,
determining a load history of an individual connected element based on a position of the individual connected element within the assembled work machine, wherein the work machine is a crane, and
transmitting the determined length of use of at least one of the connected elements together with identification information to a storage device for preparing a log of use of the at least one connected elements, and
automatically determining the position of one or more of the connected elements within a tower or boom of the assembled work machine based on the modified information;

the storage device is within a central management unit that is connected or is connected communicationally to one or more monitoring devices of different work machines and/or that is attached to the connected elements.

15. The work machine in accordance with claim 14 , wherein one or more optical fibers are provided for transmitting encoded identification information of at least one of the connected elements to the monitoring device and/or to at least one further of the connected elements, and
the position of the one or more connected elements within a tower or boom of the assembled work machine is determined based on characteristic signals from the one or more optical fibers.

16. The work machine in accordance with claim 15 , wherein one or more connected elements are installed behind one another and the optical fibers are fastened to individual connected elements such that a continuous optical fiber transmission path is formed by installation of the connected elements.

17. The work machine in accordance with claim 14 , wherein a contactless radio transmission system is provided between the monitoring device and the connected elements or between individual connected elements.

18. The work machine in accordance with claim 14 , wherein the work machine is a tower crane, a mobile crane, or a crawler crane.

19. A system having at least one central management unit and least one work machine, comprising:
a monitoring device and two or more assembly elements,
connected elements of the work machine transmitting information in series to a monitoring device of the work machine, the information comprising identifiers

Assignees

• Liebherr Werk Biberach Gmbh

Inventors

• Krupinski Jacek

Classifications

• G02B6/34

  utilising prism or grating {(G02B6/293 takes precedence)} · CPC title

• B66C15/065 Primary

  electrical · CPC title

• B66C13/46

  Position indicators for suspended loads or for crane elements · CPC title

• B66C15/06

  Arrangements or use of warning devices · CPC title

• G07C5/085

  using electronic data carriers · CPC title