| 摘要 |
PROBLEM TO BE SOLVED: To provide on-vehicle equipment capable of preventing inappropriate execution of a clock-time correction and correcting a clock-time with simple processing.SOLUTION: An on-vehicle network is constituted by connecting plural pieces of on-vehicle equipment, such as radio 11, digital tachograph, engine, and log storage device, to a communication line 8. The digital tachograph provides clock-time information of a time piece onto the on-vehicle network for on-vehicle equipment including therein no time piece repeatedly at given temporal periods. A CPU 16 of the radio 11 functions as a correction determination part 20 and a clock-time correction part 22. The correction determination part 20 determines whether in a correction-requiring state where a clock-time of the time piece needs correction. In the case of the correction determination part 20 determining to be in the correction-requiring state, the clock-time correction part 22 corrects the clock-time of the time piece to a clock-time indicated by the clock-time information of the time piece of the digital tachograph, the information obtained by a clock-time information obtainment part 21.SELECTED DRAWING: Figure 2 |
