Importance

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Abstract

An on-board terminal device includes a volatile storage unit, a non-volatile storage unit, a map data storage unit that stores map data indicative of a target route, an error calculation unit that calculates an amount of positional offset of own mining machine from the target route on a basis of the map data and own mining machine position information, a departure determination unit which determines that the own mining machine has departed from the target route, and a data storage destination control unit that, if the departure determination unit determines to have departed, extracts log data out of the log data stored in the volatile storage unit, archives and stores the extracted log data in the non-volatile storage unit, and also stores log data, which would be outputted after the time point of the departure, in the non-volatile storage unit.

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First Claim