| 摘要 |
Three electromagnetic beams (33,34,35) are created with pedetermined direction and position in a room (22). A receiver/ transmitter (13,14,15) for oscillation energy is positioned in each of electromagnetic beams. At least two transmitters/receivers (16,17) for oscillation energy are The delay time interval for oscillation energy between each of transmitters/receivers on the feed beam and each of receivers/ transmitters positioned by electromagnetic beams is measured. The positioning of the feed beam is controlled such that measured delay time intervals achieve predetermined values. |
