Arrangement for condition monitoring of a rope of a hoisting apparatus

An arrangement for condition monitoring of a rope of a hoisting apparatus, which rope comprises a plurality of conductive load bearing members for bearing the load exerted on the rope in longitudinal direction and extending parallel to each other and to the longitudinal direction of the rope, which arrangement comprises:

• one or more eddy current test units arranged for being placed near said rope for generating a time-varying magnetic field, said time-varying magnetic field causing eddy currents in said rope, and for detecting a secondary magnetic field being generated by said eddy currents in said rope as eddy current detection data, and
• an on-line monitoring unit receiving and utilizing said eddy current detection data for on-line condition monitoring of said rope,
• wherein an at least one eddy current test unit of said one or more eddy current test units comprises:
• two or more printed circuit boards arranged for being placed near said rope and arranged in a perpendicular direction in relation to the plane formed by adjacent load bearing members of said rope and parallel to each other, and arranged in a parallel direction or in a direction turned degrees or less from the parallel direction in relation to the length of said rope,
• wherein at least one printed circuit board of said one or more printed circuit boards each comprises one or more eddy current inspection probes, each of said one or more eddy current inspection probes comprising two excitation coils and/or sensing coils arranged for being near said rope in said at least one printed circuit board.