Diagnosis of Supporting Structures of HV Lines Using Magneto-Mechanical Effects

Abstract

This paper concerns the idea of using magneto-mechanical effects in prophylactic activities to reduce the risk of occurrence of an extensive blackout on high voltage (HV) lines. The subject matter of the paper is related to the event from April 8, 2008, which deprived approximately 600,000 recipients from 18 cities of the West Pomeranian voivodeship of power and caused millions in losses for the national economy. In theoretical considerations, the idea of diagnosing the technical state and level of effort of steel power line towers using the metal magnetic memory method (MMM) is presented, with a consideration of the methodology for obtaining a reference signal from the external magnetic field. The capabilities of the MMM method have been illustrated by examples of active and passive experiments. Finally, the authors indicated the need of IT support of MMM data analysis using a 3D model of the predicted distribution of the magnetic field in the vicinity of the tested object.

NDT of Rating Impact of Laser Padding on the Surface Layer

“…In order to control the surface layer of ferromagnetic materials and the quality of the laser treatment, is proposed an implicit relationship that exists between the chemical composition of the material, its structure, mechanical, and physical parameters. On the basis of the literature [4][5][6][7][8][9][10][11][12] was found that the magnetic and electrical parameters of the material are very sensitive diagnostic indicators, which is used in non-destructive magnetic tests. For initial research and atypical exploration of research problems (assessment of microstructure and stress in industrial conditions), three research methods were used:…”

NDE and SHM of Critical Parts using Magnetic and Electromagnetic Methods

“…There are also magnetic anomalies (M A i q. A reliable interpretation of test results of MMM is connected with obtaining additional information about DUT geometric, distance of magneto-meters from DUT and potential sources of artificial magnetization of DUT material [13]. Quantitative analysis of test results of MMM is controversial due to the lack of reliable data on:…”

Use of magnetic monitoring of vehicles for proactive strategy development

“…It was noted that changes of the quality of own magnetic field of a ferromagnetic object can occur due to geometrical non-continuity, while quantitative changes will be the outcome of changes of a ferromagnetic material's volume and its magnetic properties (Iwaniec et al, 2014). These phenomena emerge under the influence of the Earth's magnetic field and can be associated with an object's magnetic state (magnetization of an object), which form certain image (a signature) of the magnetic field belonging to a given moving object.…”