DOORWAY OF AN ELEVATOR

摘要

Radio signals are communicated on spatially separate radio paths across a doorway of an elevator. Signal strengths of the radio signals are measured and used to determine traffic served by the elevator. In this way traffic boarding and leaving the elevator may be measured when more than one unit of traffic, for example people, pass through the doorway simultaneously.

主权项

1. A method comprising:
receiving radio signals communicated on spatially separated radio paths across a doorway of an elevator; measuring signal strength of the radio signals; and determining a number of traffic units served by the elevator on the basis of the amount of attenuation of the measured signal strengths.