Development of Observation System for the Vibration of a Wire-Pantograph System
with a Super-anamorphic-lens
Katsushi MANABE, Akira ICHIGE, Mitsuhiro AOKI
The vibration of overhead wire is one of the most important performances for a wire-pantograph
system. Until now, we have measured the vibration of it with a displacement-meter, an accelerometer
or a strain-gauge, but in this way we can measure the behavior of the vibration only at several
places and cannot make clear the whole behavior of its vibration. It is said that the overhead
wire displaces with as long wavelongth as several tens of m in the longitudinal direction and
as small amplitude as 0.1 m in normal dirction. We successfully developed a super-anamorphic-lens
with a focal length ratio of in 76:1 that permits simultaneous televiewing of its vibration
over several spans. We intend to develop an analytic way of finding its displacement, vertical
velocity, inclination, curvature etc. of a wire with this lens.