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DETECTING METHOD OF ABNORMAL SURFACE OF STEEL-TAPE ARMORED CABLE
DETECTING METHOD OF ABNORMAL SURFACE OF STEEL-TAPE ARMORED CABLE
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机译：钢带铠装电缆异常表面的检测方法
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摘要
PURPOSE:To detect abnormality of a cable surface continuously by irradiating the outer periphery part of a cable which run lengthwise with light in its tangential direction, converting projections and recesses of the surface into an electric signal and obtaining reference data, and deciding on deviation in the time interval of the electrical signal on the basis of the reference data. CONSTITUTION:Projections and recesses are formed regularly on the surface of the steel-tape armored cable C at pitch P. The light emitting element 10 and photodetecting element 12 of an optical size measuring instrument 10 are arranged at the outer periphery part of the cable C which is run at a linear speed while crossling a light beam L nearly parallel to the outer peripheral tangential direction of the cable C, and variation in external diameter is detected in the form of variation in the quantity of arrival light and converted into an analog electric signal, which is transmitted to an A/D converter 14 through an amplifier 13; and its digitized signal is sent to a central procesing unit CPU15 and time intervals of level variation are measured to set a reference value.
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