Attention Makers


Innovation And Implementation Of An Online Crack Detection In Railways


Our Technique In A Nutshell: OUR IDEA EVOLVES AROUND A laser source which is constantly beaming on the railway track emitting reflected wave to create the desired output whose intensity is directly proportional to the state of the surface metal .When the laser falls on an uneven rail caused by fissures on the track, by its reflecting property, it will reflect back but with a lower intensity. A laser sensor placed on the train which will sense the reflected laser light timing deviation and communicate the same through the scada to the master control unit which would compare the input with various data to match the corresponding matching data to create a warning signal. Technique proposed by us: LENS M A I N C O N T R O L U N I T LASER DIODE cum BEAM ANALYSER CROSS SECTION OF A CRACK DETECTION UNIT (CDU) M1 LASER WINDOW POLYGON MIRROR CONCAV-O-CONVEX LENS So here is our designed concept to prevent rail accidents. The model if successfully applied can minimise rail accidents to a large extent. Technique: Two lasers will be placed on the top of the engine which will send out pulse of laser beams & work on the principle of detecting the metal alloy. So let us consider for only one track only. When the train is about to start the control detection unit starts up and the scanning process starts to find the location of the track. The location of the track is confirmed only when the time gap taken for the laser beam to fall, scatter and come back is equal to the time calculated by the main control unit. Once the time gap matches, the angle at which the beam is falling is checked and the laser beam continues to start scanning within that range unless there is absence of metal plate at that particular range. Detection of the gap is based on the principle if there is no gap present the beam of a higher intensity will reflect back as compared to the light reflected back when the laser beam falls on the cracks. The beam will not take the same time as calculated by the control unit. When the laser beam falls on a potential crack region which will cause derailment the time gap is much more than the normal and the in intensity of the beam will also be low due to continuous reflection inside the crack. For the case of the crack, after scattering the light may not reach back to the sensor network fitted on the train, even if it scatters back it would be of a lower intensity than the normal expected value. If such a case occurs then the train would be automatically stopped with the help of an electric traction. Added Advantages: Ø if there is a person or a vehicle in the path of train, the laser will not reflect back but will reflect back at a earlier time than expected. Thus, preventing a lot of accidents and suicides. Ø the laser can also be programmed to check for the fibre which provides polarity to the current flowing through the tracks. Over here the second laser can be used to check for the plate joining the butt joint.

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