COMMUNICATION SYSTEM BETWEEN GROUND AND MOBILE OBJECT

PROBLEM TO BE SOLVED: To suppress generation of poor communication in a communication system between a mobile object which runs on a fixed running path and a ground station. SOLUTION: The communication system is constituted so that a regular antenna AT1 and an emergency antenna AT2 are arranged as an antenna 4 of a running object 1 for conveyance, an antenna switching section A which becomes the poor communication in the regular antenna AT1, however, is communicable in the emergency antenna AT2 is preliminarily verified, recorded by learning on the running path 2 and it is provided with a mobile object position detection means 35 for detecting entrance and exit of the mobile object to the antenna switching section A at the time of actual work run and an antenna switching means 20 for automatically switching the regular antenna AT1 to the emergency antenna AT2 while the mobile object is located in the antenna switching section A based on a detection result of the mobile object position detection means 35. COPYRIGHT: (C)2006,JPO&NCIPI