Overhead Contact Line Inspection System by Rail-and-Road Car

An overhead contact line inspection system that can be installed on a rail-and-road car has been developed. It consists of a small size contact wire wear measuring instrument and a small size pantograph with various sensors. It can be used in the daytime at the maximum inspection speed of 30 km/h, which is limited by car running stability. From the results of laboratory and field tests, it is proved that wear measurement is accurate enough for practical use.