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Title:
ANTITHEFT DEVICE FOR MOBILE WORKING MACHINE, AND MOBILE WORKING MACHINE WITH THE SAME
Document Type and Number:
Japanese Patent JP2005267568
Kind Code:
A
Abstract:

To prevent a theft by grasping the position of a working machine even if an antenna of the working machine is harmed.

A plurality of antennas 16A and 16B for a GPS are provided, and even if any one of them is forced to a condition impossible to receive a signal, positional information can be received by the residual antenna. A plurality of antennas 18A and 18B are provided, and even if any one them is forced to a condition impossible to communicate, a signal containing positional information can be transmitted to a management server 26 by the residual antenna. Or a dummy antenna is separately provided from the antenna for a GPS and the antenna for data communication, and even if destructing operation is applied to the dummy antenna, a signal for informing the destruction is transmitted to the management server.


Inventors:
TANAKA KOJIRO
IWASAKI KAZUHIRO
Application Number:
JP2004000083119
Publication Date:
September 29, 2005
Filing Date:
March 22, 2004
Export Citation:
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Assignee:
KOBELCO CONSTR MACHINERY LTD
International Classes:
E02F9/24; B60R25/102; B60R25/33; E02F9/26; E05B45/06; G08B13/00; G08B29/16; (IPC1-7): G08B29/16; B60R25/10; E02F9/24; E02F9/26; E05B45/06; G08B13/00
Attorney, Agent or Firm:
小谷 悦司
植木 久一
村松 敏郎