Which sensor is used for the crack detection?

In the first step, an optical fiber sensor is fixed inside the reinforced concrete beam, which will be used for internal crack monitoring based on BOFDA technology.

Are there sensors on train tracks?

Sensors such as inertial sensor, accelerometers, gyroscopic sensors, and global position system (GPS), are carried on a railway vehicle to continuously monitor and inspect rail assets to meet the growing needs of safety improvement, reliable and low-cost rail operations.

What is crack trains?

These trains run by the north eastern railways during the pandemic are being called the Crack trains. These freight trains operate nonstop between the originating point and the destination, resulting in prioritized and swift transportation of goods.

What is crack detection?

Crack detection is a process of detecting defects in non-porous materials or surfaces, such as metals, ceramics and plastics. Without effective crack detection, repair methods will be faulty.

How does crack detection sensor work?

The sensor is bonded onto a concrete structure, and the optical fiber cable is connected to a visible light source. When a crack occurs, the optical fiber is disconnected, and the light leaks from the disconnected part.

What is hot box detector?

operation is the infrared “hotbox detector,” which, located at trackside, detects the presence of an overheated wheel bearing and alerts the train crew. The modern hotbox detector identifies the location in the train of the overheating and, employing synthesized voice recording, radios the details to the train crew.

What is twist in railway track?

Twist is the term used to describe the variation in cross-level measured across the four foot over a given distance along the track. Cross-level for a twist on Railtrack Infrastructure is measured over a 3 metre distance, this equates to approximately 5 sleepers.

What are various crack detection methods?

There are three methods of crack detection especially for carbon steel, these are; Magnetic particle testing or inspection, Liquid penetrate inspection, Eddy current testing method, and.

How do you monitor a crack?

The best method for measuring cracks is by installing a crack monitor or ‘tell-tales’ (generic name). A crack monitor or tell-tales, is a simple and effective gauge to measure the movement of cracks in brick, concrete, or masonry structures. A crack monitor consists of two overlapping acrylic plates.