Power cable turning radius detection device and detection method thereof

Abstract

The invention relates to a power cable turning radius detection device and a detection method thereof. The device comprises a distance measurement unit and a data processing unit. The distance measuring unit is arranged on the inner side or the outer side of the turning position of the power cable and used for detecting the maximum vertical distance and / or the minimum vertical distance between thecenter point of the distance measuring unit and the turning position of the power cable and detecting the horizontal distance between the center point of the distance measuring unit and the abuttingposition of the power cable. The data processing unit is used for calculating the turning radius of the power cable according to the data measured by the distance measuring unit. According to the invention, the maximum vertical distance and / or the minimum vertical distance between the central point and the turning position of the power cable are / is detected through the distance measuring unit, thehorizontal distance between the center point of the power cable turning radius measuring device and the abutting position of the power cable is detected, and the turning radius of the power cable isaccurately calculated by the data processing unit. The power cable turning radius detection device is high in measuring precision and efficiency, small in size, and particularly suitable for narrow space or the situation that obstacles block the power cable.

Description

technical field [0001] The invention relates to the technical field of power cables, in particular to a power cable turning radius detection device and a detection method thereof. Background technique [0002] During the construction of power cables, power cables have strict requirements on the turning radius. If the turning radius of the power cable is too small, the inside of the conductor may be mechanically damaged, and the mechanical damage cannot be seen because it is covered by the insulation layer of the power cable. Measuring loop resistance, insulation and leakage tests are also difficult to find defects. During operation, the damaged part is overheated to reduce the insulation strength of the cable until it fails. It can be seen that during the construction of power cables, the torsion force on the cables should be reduced as much as possible, and when the power cables are turned and the cables are reserved, the cables should be naturally bent to prevent internal ...

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Problems solved by technology

[0003] In actual operation, visual inspection is often used, and the operator's experience is used to judge whether the turning radius meets the requirements. If the judgment is wrong, rework is required, which is not conducive to quality management and control.

[0004] Another traditional measurement method is to use several steel tapes to measure the turning radius of the cable according to the relevant calculation formula. The error is relatively large, and there are the following problems: (1) If the cable is not bent in a standard arc, the steel tape cannot measure continuously According to the bending radius of each point of the bending arc, the calculated turning radius of the cable may not be the minimum turning radius of the cable; (2) If the turning radius of the cable is a critical value, the measurement accuracy of the steel tape does not meet the measurement requirements; (3) the measured correlation After the length data, it is necessary to manually calculate the turning radius of the cable, which is inefficient

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