The invention relates to a
theodolite-based large-scale spherical tank pillar verticality on-line accurate measurement method. The
theodolite-based large-scale spherical tank pillar verticality on-line accurate measurement method comprises the following steps of 1, preparing a contrast sample through the processes of
cutting off parts having length of L from steel wire ropes having different diameters according to a determined steel
wire rope diameter scope and carrying out steel
wire rope nondestructive test contrast
sample preparation, 2, selecting steel wire ropes which have the same structure and length of 2 meters,
cutting the selected steel wire ropes at their middle parts for same defect manufacture, and carrying out
breaking force experiments respectively on the
cut steel wire ropes, 3, carrying out
magnetization, calibration and detection of the steel
wire rope nondestructive test contrast sample obtained by the step 1 by a steel wire
rope electromagnetic tester to obtain different defect detection values, and preparing a contrast sample parameter parallel table corresponding to
breaking force values, and 4, determining steel wire
rope detection data according to on-site detection data and the contrast sample parameter parallel table, calculating
breaking force values of the detected steel wire ropes according to the steel wire
rope detection data, and carrying out detection conclusion determination. The
theodolite-based large-scale spherical tank pillar verticality on-line accurate measurement method is simple, can produce effects fast, and can guarantee safe and normal use of a steel wire rope according to accurate contrast of a steel wire rope nondestructive test contrast sample and a detection result.