To enable the checking of a spraying operation history on a map, the management of the appropriate amount of usage of an antifreezing agent depending on each spraying place, and the management of appropriate spraying timing depending on timing for sustaining the function of the antifreezing agent, by enabling the state of a spraying operation, performed by a plurality of working machines for spraying the spraying material, to be accurately and uniformly managed in a collective manner.
The working machine comprises a positioning means, a working state detecting means, a spraying amount detecting means, a communication means, and a control means for performing control for transmitting spraying operation information, including its own identification code, its owns present position, and the amount of the spraying of the spraying material from the start of the operation to the present time, to a management device by the communication means. The management device comprises a communication means, an information storage means for sequentially storing spraying operation information transmitted from the working machine, and a control means having the function of creating information on an operating map onto which prescribed information is added, in accordance with map information and the spraying operation information stored in the information storage means.
SHIBAMORI KAZUHIRO
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Ichiro Suzuki
Hirohiro Ichimura
Kazunori Satake
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