G - Physics – 01 – N
Patent
G - Physics
01
N
358/8
G01N 23/02 (2006.01) G01B 15/00 (2006.01)
Patent
CA 1286425
Abstract of the Disclosure: A cable insulation eccentricity and diameter monitor comprises a revolving structure mounted coaxially with the cable, a finely collimated source of gamma particles mounted on such revolving structure for generating a beam of gamma particles, a radiation detector fixed to the revolving structure for detecting the gamma particles scattered from such beam by the cable and for generating pulses the amplitude of which is dependent on the energy of the scattered gamma particles reaching the detector, first drive means for moving the source of gamma particles relative to the revolving structure so as to direct the beam at a first set of predetermined target positions corresponding to probable conductor and cable/atmosphere boundaries of the cable in a plane substantially normal to the axis of the cable, second drive means for repositioning the revolving structure to move the source of gamma particles and the radiation detector to a position around the cable which is at a predetermined angle with respect to their original position so as to direct the beam at a second set of target positions corresponding to probable conductor and cable/atmosphere boundaries, a pulse height analyser responsive to the detector for detecting and counting the pulses produced by the detector within a preset range of pulse height, and a computer responsive to the output of the pulse height analyser and to test data stored in its memory for operating the first and second drive means to find the actual location of such boundaries and for computing insulation eccentricity and diameter of the cable from such findings.
576977
Hintze Frank W.
Lucas John M.
Alcatel Canada Inc.
Primak & Co.
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