Working machine and method of measuring work amount of working machine

Patent metadata

Field	Value
Publication number	US-9309650-B2
Application number	US-201314441578-A
Country	US
Kind code	B2
Filing date	Nov 7, 2013
Priority date	Nov 20, 2012
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A working machine includes: an operation state detection unit configured to detect a physical amount output according to an operation of an operation lever; a time integration unit configured to calculate a time integration value by performing time integration of the physical amount; a determination unit configured to cause the time integration value and a predetermined operating angle of an excavating and loading mechanism associated with the operation of the operation lever to correspond to each other, and to determine that the operation of the operation lever has been performed, at a time the time integration value becomes a predetermined integration value or more; and a counting unit configured to count number of times of a series of excavating and loading work.

First claim

The invention claimed is:

1. A working machine comprising:
an operation state detection unit configured to detect a physical amount output according to an operation of an operation lever;
a time integration unit configured to calculate a time integration value by performing time integration of the physical amount;
a determination unit configured to cause the time integration value and a predetermined operating angle of an excavating and loading mechanism associated with the operation of the operation lever to correspond to each other, and to determine that the operation of the operation lever has been performed, at a time the time integration value becomes a predetermined integration value or more; and
a counting unit configured to count, at a time operations of the excavating and loading mechanism determined by the determination unit are performed in a predetermined order, number of times of a series of excavating and loading work, treating a series of the operations of the excavating and loading mechanism performed in the predetermined order, as one time, wherein
the series of the operations of the excavating and loading mechanism is excavating and loading operations performed in an order of an excavation operation, a forward swing operation, a soil removal operation, and a return swing operation, and
the counting unit is configured to correct, at a time a specific state occurs in which the order of the series of the operations of the excavating and loading mechanism is stagnated or skipped, counting processing of the number of times of the series of excavating and loading work according to the specific state.

2. The working machine according to claim 1 , wherein the counting unit is configured to perform deemed counting processing to count as one time of the series of excavating and loading work at a time a specific state occurs in which non-operation times of operations other than the excavation operation and the swing operation pass for a first deemed predetermined time or more after termination of the forward swing operation.

3. The working machine according to claim 1 , wherein the counting unit is configured to perform, after the soil removal operation, deemed counting processing to count as one time of the series of excavating and loading work at a time a specific state occurs in which non-operation times of operations other than the excavation operation pass for a second deemed predetermined time or more.

4. The working machine according to claim 3 , wherein the counting unit is configured not to perform the deemed counting processing after termination of the forward swing operation at a time the counting unit has performed the deemed counting processing after termination of the forward swing operation once.

5. The working machine according to claim 1 , wherein the counting unit is configured to reset the counting processing of the number of times of the series of excavating and loading work at a time a specific state occurs in which the soil removal operation is performed immediately after the excavation operation.

6. The working machine according to claim 1 , wherein the counting unit is configured to reset the counting processing of the number of times of the series of excavating and loading work at a time a specific state occurs in which the return swing operation is performed immediately after the forward swing operation.

7. The working machine according to claim 1 , wherein the operation lever is a pilot control lever or an electric lever, and
the physical amount is a pilot pressure or an electrical signal.

8. A method of measuring a work amount of a working machine, the method comprising the steps of:
detecting a physical amount output according to an operation of an operation lever;
calculating a time integration value by performing time integration of the physical amount;
causing the time integration value and a predetermined operating angle of an excavating and loading mechanism associated with the operation of the operation lever to correspond to each other, and determining that the operation of the operation lever has been performed, when the time integration value becomes a predetermined integration value or more; and
counting, at a time operations of the excavating and loading mechanism determined by the determining step are performed in a predetermined order, number of times of a series of excavating and loading work, treating a series of the operations of the excavating and loading mechanism performed in the predetermined order, as one time, wherein
the series of the operations of the excavating and loading mechanism is excavating and loading operations performed in an order of an excavation operation, a forward swing operation, a soil removal operation, and a return swing operation, and
the counting step corrects, at a time a specific state in which the order of the series of the operations of the excavating and loading mechanism is stagnated or skipped occurs, counting processing of the number of times of the series of excavating and loading work according to the specific state.

Assignees

• Komatsu Mfg Co Ltd

Inventors

• Nagato Atsushi
• Imamura Tsuyoshi
• Tokura Hiromi

Classifications

• E02F9/267

  Diagnosing or detecting failure of vehicles · CPC title

• G07C5/0808

  Diagnosing performance data (testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005) · CPC title

• E02F3/435 Primary

  for dipper-arms, backhoes or the like · CPC title

• E02F9/264

  Sensors and their calibration for indicating the position of the work tool · CPC title

• E02F9/2054

  Fleet management · CPC title