Title:
COMMUNICATION STATE NOTIFICATION SYSTEM OF WORK MACHINE
Document Type and Number:
Japanese Patent JP2019062439
Kind Code:
A
Abstract:
To provide a communication state notification system of a work machine that can support determination of a cause of change in a communication situation by notifying the soundness of the communication situation.SOLUTION: A communication state notification system calculates distance d between a base station 2 and a hydraulic excavator 1 on the basis of the position of a base station radio communication device and the position of a work machine, calculates distance attenuation R which is attenuation due to distance of communication radio waves between the base station 2 and hydraulic excavator 1, calculates geography attenuation F which is attenuation due to geography of communication radio waves between the base station 2 and hydraulic excavator 1 on the basis of geographic data, calculates reception power Pr which is an estimation value of strength of a reception signal in radio communication between the base station 2 and hydraulic excavator 1 on the basis of the distance attenuation R and geography attenuation F, and displays it on a display device 150.SELECTED DRAWING: Figure 2
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Inventors:
SUGAWARA KAZUHIRO
Application Number:
JP2017186367A
Publication Date:
April 18, 2019
Filing Date:
September 27, 2017
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
H04W16/18; E02F9/26; H04B17/23; H04B17/373; H04B17/391; H04W4/40; H04W24/04
Domestic Patent References:
| JP2001251358A | 2001-09-14 | |||
| JPH09153867A | 1997-06-10 | |||
| JP2016225944A | 2016-12-28 | |||
| JPH11242061A | 1999-09-07 |
Foreign References:
| US20140257779A1 | 2014-09-11 |
Attorney, Agent or Firm:
Kaichi International Patent Office