Condition monitoring of Railway tracks is essential to reduce the Life Cycle Cost (LCC) and the Total Cost of Ownership (TCO) and increase reliability and safety. Condition monitoring of the bogie suspension and the rail track are also important for preventing derailments. Measurement instruments based on vibration sensing of the train coach floor have been in use in the railways for last two decades. MEMS based Oscillation Monitoring System (MOMS) is a new generation fully automated, cost effective and ultraportable device aimed at improving the user experience and reliability of data recording.
The key features of the device are :
- High accuracy of fault prediction
- Compact and sleek design for extreme portability, with sophisticated look and feel
- Simple to operate – just one button on-board, for power
- Adequate audio-visual indicators on the device for easy observation during runtime
- Built-in battery with charger with USB charging facility
- Battery backup upto 9 hours
- Pluggable microSD card for continuous recording of vibration and GPS locations upto 2 weeks
- Track fault location accuracy of upto 20 m on ground
- Wireless connectivity over bluetooth for data display during runtime
- Simple computer end GUI with live graph display, geographical map and report generation
- Configuration possible wirelessly from the netbook computer for jerk threshold, file table etc.
- Easily mountable on the floor of any railway bogie using adhesive tapes or Velcro fastener
Data recorded on the SD card can be later retrieved by reading the card on a computer. It can later be analysed for performing predictive maintenance, leading to a better ride experience. A standard algorithm can be used to calculate a parameter called Sperling’s Ride Index for comparison of various track condition. An ecosystem for the device-computer can been represented by the figure below.
The system also incorporates an advanced feature for locating fault on the track. When switched to the Retrace Mode, the device begins to read the previously recorded jerk location. If the location of any of the previously recorded faults happens to be within 200 m radius of the device, it gives an alarm with increasing intensity as the location comes nearer.