The system, developed by Konkan Railway Corporation Limited, eliminates manual examination of trains and measures axle box
temperature, wheel disc temperature and records the under-gear of rolling stock of running trains through infrared and other cameras.
High-frequency vibration generated on the wheel-rail surface under excitation of all kinds of irregularities can be easily transferred to the axle box
. However, previous studies on the axle-box acceleration [14-17] have only focused on the use of response of the axle-box acceleration in frequency domain to monitor defects without any threshold proposed for safety running.