Title:
WORK MACHINE SAFETY DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/148946
Kind Code:
A1
Abstract:
Disclosed is a work machine safety device that instantly, easily and precisely makes an operator aware of current stability when carrying out work such as front assembly operations and rotating operations. In a work machine safety device, a control device is provided with: a ZMP calculation means (60f) that uses position information, acceleration information, and external force information for each moving part of a body and a traveling body, such as a front assembly, to calculate ZMP coordinates; and a stability computation means (60d) that calculates a support polygon formed by a plurality of ground contact points for the ground under the work machine, and generates a tilting warning when the ZMP is contained in the warning area formed inside of the periphery of the support polygon. Also provided is a display device (61d) that displays the top view of the work machine and the ZMP position of the work machine with respect to the support polygon. The ZMP calculation means and the stability computation means compute and display the support polygon, which includes the ZMP and the warning area, and generate a tilting warning when the computed ZMP position is contained in the warning area formed inside of the periphery of the support polygon.
Inventors:
MIZUOCHI MARIKO (JP)
ISHII AKINORI (JP)
YAMAGUCHI JINICHI (JP)
ISHII AKINORI (JP)
YAMAGUCHI JINICHI (JP)
Application Number:
PCT/JP2011/061886
Publication Date:
December 01, 2011
Filing Date:
May 24, 2011
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
MIZUOCHI MARIKO (JP)
ISHII AKINORI (JP)
YAMAGUCHI JINICHI (JP)
MIZUOCHI MARIKO (JP)
ISHII AKINORI (JP)
YAMAGUCHI JINICHI (JP)
International Classes:
E02F9/24; B66C23/90; E02F9/22
Foreign References:
| JP2006150567A | 2006-06-15 | |||
| JP2008012642A | 2008-01-24 | |||
| JPH07247578A | 1995-09-26 | |||
| JPS61287696A | 1986-12-18 | |||
| JPH10291779A | 1998-11-04 |
Other References:
YOSHIKAWA, TSUNEO: "Japanese", 1988, CORONA PUBLISHING CO., LTD., article "Robotto Seigyo Kisoron (Fundamentals of Robot Control"
Attorney, Agent or Firm:
The Patent Body Corporate TAKEWA INTERNATIONAL PATENT OFFICE (JP)
Patent business corporation Takekazu international patent firm (JP)
Patent business corporation Takekazu international patent firm (JP)
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Claims: