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Common Types Of Rail Inspection Techniques

By Gwen Lowe


The second cause of railway accidents after human errors is rail track tragic failures. According to the researches done to determine railway transportation safety, most of these failures are facilitated by maintenance problems such as poor railway inspections. In order to reduce these problems and ensure people find it easier to maintain railways under the appropriate standards, there are various rail inspection techniques that have been put into use.



One major developed techniques is the use of high-tech ultrasound devices. To detect faults on rails, these devices transmit short ultrasonic pulse waves with frequency range of one and fifteen to the center of the metal being inspected. The device also receives back such waves in form of amplitude signals, which show the intensity and the distance moved, by the waves.

One other common technique is the distribution of eddy current on the rails. Normally, these ways are self-induced and creates magnetic field on such metals. Naturally, the stronger the magnetic field, the stronger the electrical conductivity in the metals being examined. When inspecting rails, the specialist would have to compare the initial electrical conductivity of such metals and the recent one to determine if such metals have faults.

Another commonly used approach when examining railway faults is radiography technology. This practice works by transmitting electromagnetic waves especially x-rays into certain metals at very high speeds to aid in examining the interior structure of such metals. These rays would then come back to the device in form of an image. Afterwards, high-tech machines would be used to read the details of such images to determine whether there are faults.

The use of magnetic particle inspection is also common. This practice is majored at detecting subsurface and surface discontinuities in ferromagnetic materials like cobalt, nickel and iron. It works by inducing a magnetic flux to the surface of metals. If the metal has some faults, the magnetic flux would leak since air cannot hold the same magnetic field per volume like metals.

Railway inspection cars come with the appropriate devices and technologies to aid in examining rails for flaws. These are equipped with transducers and probes on the boards that work in testing problems with railway mileage and other sight-related defects. Most of these cars move at a speed of more than forty-eight kilometers per hour.

Another essential technique that plays a great role when examining faults in rails is the use of electromagnetic acoustic transducers. Transducers use electromagnetic systems to instantly generate certain waves when placed over certain metals. These waves are used to determine the presence of problems on such materials that guarantees the right measures could be taken.

Each time people aboard a train, their desire is to reach their destination safe. However, sometimes this do not turn as expected especially when the rails where such trains pass through are not poorly conditioned. In order to reduce these problems, people have researched various methods for inspecting rails, which aid in detecting flaws on time to ensure the appropriate measures are taken.




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