A double-layer encircling radio frequency coil for aging measurement of sheds of composite insulators

Abstract

The invention discloses a double-layer surrounding type radio frequency coil for the aging measurement of a composite insulator umbrella skirt. The coil is in the form of an annular coil of a two-layer structure composed of an upper layer and a lower layer. The lower layer is composed of a periphery of lower circular arcs arranged along the periphery of an annular upper edge and raised towards the internal center of the annular upper edge. Between adjacent lower circular arcs, a plurality of upper circular arcs, of the same size as the lower circular arcs and the same direction as the lower circular arcs, upwardly form the upper layer via leads. Annular gaps are formed between the plurality of upper circular arcs and the periphery of lower circular arcs. The orthographic projection of each upper circular arc on two adjacent lower circular arcs connected with the upper circular arc is partially overlapped with the two lower circular arcs. The periphery of the composite insulator umbrella skirt is clamped by the above annular gaps, so that the upper circular arcs and the lower circular arcs cling to each other. In this way, the radio frequency coil is fastened onto the composite insulator umbrella skirt to be measured. According to the technical scheme of the invention, the radio frequency coil is clamped onto the composite insulator umbrella skirt, so that the composite insulator umbrella skirt can be measured. As a result, the radio frequency coil is convenient to use and the overall composite insulator umbrella skirt can be measured. The overall aging degree of the composite insulator umbrella skirt can also be measured.

Description

technical field [0001] The invention relates to a planar radio frequency coil, in particular to a double-layer surrounding radio frequency coil used for aging measurement of sheds of composite insulators. Background technique [0002] Nuclear magnetic resonance is a physical phenomenon in which the nuclear magnetic moment of a substance undergoes energy level splitting under the action of an external magnetic field, and an energy level transition occurs under the action of an external radio frequency magnetic field. Since the discovery of nuclear magnetic resonance absorption by American scientists Bloch and Purcell in 1946, nuclear magnetic resonance technology has achieved unprecedented development in the fields of spectroscopy and medical imaging, which has greatly promoted the progress of human society. [0003] NMR equipment using NMR technology includes high-field NMR equipment and low-field NMR equipment. Common high-field nuclear magnetic resonance equipment, such a...

AI Technical Summary

Problems solved by technology

However, the current RF coils for composite insulator shed aging measurement, such as planar spiral coils and "8"-shaped planar coils, have such structures that they can only perform local measurements on the composite insulator shed, but cannot measure the composite insulator's shed. The overall measurement of the umbrella shed leads to the inability to accurately estimate the overall aging degree of the composite insulator shed, and the internal structure of the radio frequency coil cannot be changed, and the flexibility of use is poor

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