| 摘要 |
<p>Flanged steel wheels remain in service on rail cars, locomotives, and other heavy rail guided machinery until they no longer maintain minimum specified rim or flange profile dimensions. If the rim or flange profile of the wheel cannot be returned to minimum specifications by surface machining operations, the wheel is condemned as being defective and is removed from service and scrapped. It is desirable to use an automated inspection device to determine if a wheel is approaching this condemning limit of profile wear. The invention automatically detects profile defects upon passing the wheel (26) by a rail mounted antennae (21a, 21b, 21c) which forms a resonator cavity and transmits microwave radiation for producing a signal indicative of a wear condition of the rim or wheel. A rim ranging transmitting/receiving antenna (50) is directed to a non-wear reference area (F) on the wheel for producing an output signal useable as a constant reference in relation to the microwave antenna position in determining the magnitude of the wear condition. The circuit of the device may include a source for continuously energizing the antennae during a passage period of the wheel being tested, and the circuit of the device continuously receives data in the form of a curve for each antenna. The continuously received data is compared with stored data for establishing optimal data points for selecting produced signals.</p> |
