| 摘要 |
<p>PROBLEM TO BE SOLVED: To instantaneously and easily confirm the presence or absence of a specified participant without being uneasy about the shortage of a battery. SOLUTION: Each participant 1 carries or has on their clothes name card 2 having an IC card 2 readable in no contact. An electronic roll call table 4 is set near the boarding port of a vehicle 5 such as bus, and it obtains a power from a cigarette socket. The electronic roll call table 4 receives the ID number stored in the IC card 2 every passing of the participant 1 through the boarding port and lights, on a display panel, a green LED for the participant in the vehicle and a red ELD for the participant out of the vehicle on the basis of the ID number.</p> |
