DEVICE FOR MEASURING DIAMETER OF WHEELS OF RAIL VEHICLES Russian patent published in 1998 - IPC

FIELD: railway transport; measuring facilities. SUBSTANCE: wheel irregularity pressure sensitive pickups are placed over entire length of measuring rail whose length exceeds length of wheel circumference. Pickups are installed along axial line of measuring rail at distance from each other to provide simultaneous contact of wheel surface only with three sensitive members of pickups at a time. Signals from three pickups are processed by logic circuit and are compared with standard signals. If signals do not coincide in amplitude, mechanism marking the defective wheel with paint and signal unit are set into operation. Simultaneously wheel defect is recorded in recorder unit with indication of ordinal number and character of defect. Wheels are checked at running of vehicle for bogie provided with pair of wheels at both sides. EFFECT: facilitated checking of wheel diameters. 6 dwg