水力発電所水圧鉄管内部の無線通信実験について

抄録

In order to establish a secure communication network during periodic inspection of hydroelectric power stations, the thesis conducts the radio propagation experiment in penstocks. To begin with, using an experimental apparatus which produces multi-path environment of line-of-sight area, transmission characteristics of a wireless LAN are measured. Next, based on the results, a set of antenna system which reduces the communication failure in line-of-sight area is developed. Then, the effectiveness of the system is experimentally confirmed in the straight section of a penstock. Furthermore, the means added to the system in order to solve problems of wireless LAN communication of over-the-horizon area are devised, and the performance of the advanced system is evaluated with an experimental apparatus which produces multi-path environment of over-the-horizon area. Finally, the effectiveness of the proposed system is experimentally verified in whole penstocks including bend.