Wire ropes are an integral part of cranes, bridges, elevated walkways, lifts, elevators, cable cars and mines. The very high safety factors that apply to wire ropes in these applications attest to their importance.
For various reasons, wire ropes of all applications need to be inspected and replaced, whether for safety reasons or to comply with a standard operation procedure.
Over time, deterioration in the wire ropes could result in corrosion (Loss of Metallic Cross-sectional Area - LMA) or wire breakages (Local Faults - LF). These damages could occur anywhere on the surface or the inside of the wire ropes.
The main advantage of eMag over visual inspection is the ability to detect deterioration in the body of the rope, rather than just on the surface. Other advantages are that eMag is objective and that the ropes do not have to be cleaned for inspection. Not only does eMag tell a comprehensive condition of your rope, the process to conduct the wire rope inspection is by far simpler, faster and more accurate than conventional visual inspection.
eMag inspection has gained recognition by many industries, commonly used for crane, elevators, hoist wire rope inspections. An eMAG device adopts the principle of Magnetic Flux Leakage (MFL) to function. Our eMAG device basically consists of 2 parts, the magnetic head and a data logger.
To scan a length of wire rope, the magnetic head is clamped around the wire rope. The wire rope then passes through the magnetic head and the data is recorded into the data logger.
The permanent magnet induces a field around the area-section of the wire rope. Any defects such as LMA or LF will disrupt the flow of magnetic field which will be detected by the sensors.
In some circumstances, the magnetic head can also be guided along an immobile wire rope which will also yield the same result.