| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an operation management system capable of displaying information such as the road inclination of a traveling area together with travel information in a tachograph for recording traveling information such as traveling time, a vehicle traveling speed and a travel distance. SOLUTION: The tachograph mounted on the vehicle is provided with a GPS receiver, data about the latitude, longitude and altitude of a place where the vehicle travels are received from a satellite, and the road inclination at each traveling place is calculated from the change of altitudes within an infinitesimal time and is displayed together with traveling time data and speed data.</p> |
