| 摘要 |
PROBLEM TO BE SOLVED: To easily make correspondent a cumulative time being counted at the side of a work machine such as an agricultural machine, working data in the case where the agricultural machine is operated, and a time.SOLUTION: A data management device 4 comprises: a time calculation section 34 which calculates a time; a correspondence section 33 in which, when working data and a cumulative time which are outputted from a work machine during communication with a data collection device 3, are received, the working data, the cumulative time and the time calculated by the time calculation section 34 are made correspondent; and a data correction section 38 which makes working data and a cumulative time stored in a data storage section 31 during a non-communication phase in which communication with the data collection device 3 is not performed, correspondent to the time. |
