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Raziskava integritete površin z magnetnimi metodami = [Surface integrity inspection by magnetic methods] : doktorsko delo
Žerovnik, Pavle
V predloženem delu je bil izveden eksperimentalni sistem za hitro napoved parametrov integritete površin na osnovi magnetnih metod. Ugotavljanje integritete površin z neporušnimi metodami merjenja, ...na osnovi napetostnega signala magnetnega Barkhausenovega šuma in histereznih zank, sta zelo zanesljivi in zato vključeni v številnih obdelovalnih sistemih. Izbrani in preverjeni mikromagnetni metodi nam ob pomoči ustreznih senzorjev za zajemanje signalov ter programske podpore za obdelavo in analizo procesiranih signalov, omogočata določiti določene parametre integritete površin. Zajeti napetostni signali so bili obdelani na različne načine, izmed katerih se je najbolje izkazala analiza močnostnega frekvenčnega spektra z izračunom variance, korelacijska funkcija z izračunom naklona ovojnice in analiza časovnih zamikov signalov, glede na sinusoida toka magnetenja. Z nadalnjo statistično obdelavo napetostnih signalov, lahko dobljene mikromagnetne spremembe povežemo z lastnostmi obravnavanega materiala.
Type of material - dissertation
; adult, serious
Publication and manufacture - Ljubljana : [P. Žerovnik], 2000
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