ELECTRO-MAGNETIC TESTING OF WIRE ROPES

摘要

A wire rope is tested simultaneously for multiple types of defects by magnetically saturating the rope at two locations in one sense and at an intermediate location in an opposite sense. A sensing coil at any of these locations detects cross sectional area variations in the rope. Two sensing coils positioned respectively between each pair of adjacent locations detect contact pattern variations in the rope. Broken wires are detected by two coils located respectively on opposing sides of the intermediate location and spaced apart by a distance which equals the radius of the coils.