Flexible magnetostriction and eddy integrated sensor for detecting defects of high-voltage transmission line

Abstract

The invention relates to a flexible magnetostriction and eddy integrated sensor for detecting defects of a high-voltage transmission line and belongs to the technical field of an electromagnetic acoustic sensor. An outer-layer magnetostriction sensor is printed on a substrate through a flexible printing coil and an inner-layer eddy sensor is printed on the substrate through the flexible printing coil; the flexible printing coil can be coiled into a cylindrical shape and clung to the surface of the high-voltage transmission line so as to form a solenoid coil; after the solenoid coil is clamped and fixed by a connector, the solenoid coil is mounted on a detected transmission line so as to detect the defects; and after the clamped and fixed state is released, the solenoid coil can be detached from the surface of the transmission line. The integrated sensor can be used for stimulating a longitudinal modal ultrasonic guide wave from the transmission line and detecting the defects of the whole structure of the transmission line on the basis of a magnetostriction effect; the integrated sensor also can be used for detecting complex impedance change of a sensor detecting coil due to the defects of the transmission line by utilizing a multi-channel eddy sensor and realizing the peripheral positioning for the defects on the basis of an eddy effect; and meanwhile, the deep positions of the defects in the transmission line can be confirmed on the basis of a surface action of an eddy field.

Description

Technical field: [0001] The invention relates to a flexible magnetostrictive and eddy current integrated sensor for defect detection of high-voltage transmission lines, which belongs to the technical field of electromagnetic acoustic sensors. Background technique: [0002] Usually, a high-voltage transmission line is helically twisted by one or more layers of single wire around its central core, and the twisting direction of adjacent layers is opposite. According to different materials, the single wire mainly includes aluminum and aluminum alloy wire, and the center wire core mainly includes galvanized steel wire and aluminum-clad steel wire. The health status of high-voltage transmission lines directly affects the operation safety and economic benefits of the power network. At present, the single-function sensors can only detect the defects of the steel core of the transmission line or the aluminum stranded wire, and cannot realize the simultaneous detection of the two mat...

AI Technical Summary

Problems solved by technology

At present, the single-function sensors can only detect the defects of the steel core of the transmission line or the aluminum stranded wire, and cannot realize the simultaneous detection of the two materials

Moreover, due to the complex structure of the sensor and its large size and mass, there are limitations such as inconvenient installation in actual detection.

Images