Northeast Frontier Railway has introduced laser based wheel profile management system. There are two types of measurement system, Calipri C42 & Calipri Prime.These systems are non-contact wheel profile measurement sensors which are portable, lightweight and easy to operate. These measuring instruments meet the specific demands of the railways by delivering accurate and reproducible results, independent of operator influence. These specialised profile measurement devices are widely used for wheel wear inspection, brake disc measurement, wheel back-to-back and diameter measurement and rail wear inspection.
CALIPRI C42 is a multifunctional device that can perform measurements like measuring wheel profile, brake disc width, wheel diameter, tire thickness and wheel clearance. CALIPRI Prime is specially focused only on wheel profile measurement. It contains censor and calibration equipment to measure dimensions of wheel which is displayed on sensor display and can be compared with predefined limit values.
A Trains wheel sets are typical wear parts, and have significant effects on passenger comfort and safety as well as noise and ride. Profiles of wheels, brake discs, rails and switches are therefore regulated by recurring measurement operations in demanding operating conditions. The challenge lies in the efficient generation of valid measurement data for the entire wheel-rail system. Efficient wheel set profile measurement can drive timely maintenance actions and help minimise train running time, as well as ensuring a smooth and safe journey for rail passengers.
