Device for detecting defective wheels on rail cars

摘要: Flanged steel wheels remain in service on rail cars, locomotives, and other heavy guided machinery unitl they no longer maintain minimum specified rim or flange profile dimensions. If the of wheel cannot be returned to specifications by surface machining operations, is condemned as being defective removed from scrapped. It desirable use an automated inspection device determine if a approaching this condemning limit wear. The invention automatically detects defects upon passing between mounted antennae which form resonator cavity transmit microwave radiation. When influenced possessing condemnable thickness, height profiles, cause D.C. voltage propagate at detector inserted into interconnected comparison bridge network. A controller monitors activates alarm remote location when detected. notifies operating personnel sequentially logs date time occurrence, axle position wheel, specific defect wheel.