Stroke operation diagnosis supporting device for hydraulic cylinder

Patent metadata

Field	Value
Publication number	US-9447563-B2
Application number	US-201314350592-A
Country	US
Kind code	B2
Filing date	Apr 12, 2013
Priority date	Apr 12, 2013
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

A stroke operation diagnosis supporting device for a hydraulic cylinder includes: movable portions; hydraulic cylinders; a stroke sensor measuring a stroke length of the hydraulic cylinder; a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset; a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder; a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; and a monitor displaying on a screen at least the measurement value of the stroke length obtained by the stroke sensor and a calibration state obtained by the calibration process unit, wherein the monitor displays continuous time change of the measurement value of the stroke length obtained by the stroke sensor.

First claim

The invention claimed is:

1. A stroke operation diagnosis supporting device for a hydraulic cylinder, the stroke operation diagnosis supporting device comprising:
movable portions sequentially supported rotatably to a vehicle main body;
hydraulic cylinders each disposed between the vehicle main body and the movable portion or between the movable portions and rotatably supporting the movable portions;
a stroke sensor provided for the hydraulic cylinder and measuring a stroke length of the hydraulic cylinder;
a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset;
a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder;
a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; and
a monitor displaying on a screen at least the measurement value of the stroke length obtained by the stroke sensor and a calibration state obtained by the calibration process unit,
wherein
the monitor displays continuous time change of the measurement value of the stroke length obtained by the stroke sensor,
the monitor further comprises a calibration invalidating setting unit setting validity/invalidity of a calibration process by the reset sensor that is conducted by the calibration process unit, and
when the calibration invalidating setting unit sets the invalidity of the calibration process, the calibration process unit does not calibrate the measurement value of the stroke length.

2. A stroke operation diagnosis supporting device for a hydraulic cylinder, the stroke operation diagnosis supporting device comprising:
movable portions sequentially supported rotatably to a vehicle main body;
hydraulic cylinders each disposed between the vehicle main body and the movable portion or between the movable portions and rotatably supporting the movable portions;
a stroke sensor provided for the hydraulic cylinder and measuring a stroke length of the hydraulic cylinder;
a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset;
a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder;
a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; and
a monitor displaying on a screen at least the measurement value of the stroke length obtained by the stroke sensor and a calibration state obtained by the calibration process unit,
wherein the monitor displays history of a plurality of correction values calibrated by the calibration process unit.

3. The stroke operation diagnosis supporting device for a hydraulic cylinder according to claim 2 ,
wherein the plurality of correction values are displayed in list.

4. The stroke operation diagnosis supporting device for a hydraulic cylinder according to claim 2 ,
wherein the plurality of correction values are calculated based on the reset of the measurement value of the reset sensor.

5. The stroke operation diagnosis supporting device for a hydraulic cylinder according to claim 3 ,
wherein the plurality of correction values are calculated based on the reset of the measurement value of the reset sensor.

6. The stroke operation diagnosis supporting device for a hydraulic cylinder according to claim 1 ,
wherein the movable portions comprises at least a boom connected to the vehicle main body.

7. The stroke operation diagnosis supporting device for a hydraulic cylinder according to claim 2 ,
wherein the movable portions comprises at least a boom connected to the vehicle main body.

8. The stroke operation diagnosis supporting device for a hydraulic cylinder according to claim 3 ,
wherein the movable portions comprises at least a boom connected to the vehicle main body.

9. The stroke operation diagnosis supporting device for a hydraulic cylinder according to claim 4 ,
wherein the movable portions comprises at least a boom connected to the vehicle main body.

10. The stroke operation diagnosis supporting device for a hydraulic cylinder according to claim 5 ,
wherein the movable portions comprises at least a boom connected to the vehicle main body.

Assignees

• Komatsu Mfg Co Ltd

Inventors

• Ikegami Katsuhiro
• Kami Yoshiki
• Shimano Yuki
• Matsumoto Hayato

Classifications

• E02F9/267

  Diagnosing or detecting failure of vehicles · CPC title

• E02F9/2296

  Systems with a variable displacement pump · CPC title

• G01D5/145

  influenced by the relative movement between the Hall device and magnetic fields (see G01R33/06) · CPC title

• E02F9/264 Primary

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

• F15B19/002

  Calibrating · CPC title