Isizukulwane samanje se-Eddy kumqhubi wensimbi

A.1 Ufuzoral

Amathuluzi amanje e-Eddy asebenza ngomgomo wokuthi inkambu ye-electromagnetic evalekile ekhiqizwa uhlelo lokuhlola lwensimbi izokhiqiza ama-eddy currents kukhondakta kagesi lapho uphenyo lubekwe khona. Le misinga iphumela ekushintsheni kwe-amplitude kanye/noma isigaba se-probe coil impedance, engasetshenziswa njengesilinganiso sokuqina kwentolo ku-conductor (bheka Isibonelo soku-1) noma sekhondatha ngokwayo (bona Isibonelo sesi-2) ).

Umfanekiso A.1 umele isizukulwane samanje se-eddy ku-conductor yensimbi futhi Umfanekiso A.2 umelela i-vector
yesizukulwane samanje se-eddy.

Indlela yamanje ye-eddy ezwela i-amplitude ifaneleka kakhulu ekukalweni kwezindwangu ezingaqhubeki ezinsimbi eziyisisekelo ezingezona uzibuthe (bona Isibonelo 1) kodwa futhi nokungenalutho okungewona uzibuthe. metallic ama-coatings ezintweni ezingezona zokuziphatha (bona Isibonelo 2). Indlela yamanje ye-eddy ezwela isigaba (bona i-ISO 21968) ifaneleka kakhulu ekukalweni kwezingubo zensimbi ezingenazibuthe ezintweni eziyisisekelo zensimbi noma ezingezona ezensimbi (bona Isibonelo 2) ikakhulukazi uma ukunamathela kwensimbi kufanele kukalwe ngopende noma ngopende. ukulinganisa okungaxhunywanga kuyadingeka, okungukuthi isinxephezelo “sokusuka” siyadingeka.

A.2 Isibonelo soku-1 — I-non-conductive coating on a conductive basis material

Kulesi simo ukuminyana kwamanje kwe-eddy kunqunywa kuphela ibanga phakathi kwe-probe kanye nesisekelo sensimbi, okungukuthi ukujiya kokumboza. Ukuze kuzuzwe lokhu izinto eziyisisekelo zijiyile kunobukhulu obuncane besisekelo sezinto. Lobu bukhulu obuncane, i-dmin, ngo-mm, bungalinganiswa njengokuthi (bona 5.3.): dmin = 2,5 δ0 (A.2)
Uma ubukhulu bezinto eziyisisekelo bungaphansi kwalokhu ukushuba okuncane, i-dmin, inani elilinganisiwe logqinsi lokumboza lizothinteka.

A.3 Isibonelo sesi-2 — I-conductive coating on non-conductive basis material

Kulesi simo ukuminyana kwamanje kwe-eddy kunqunywa kuphela ubukhulu be-coating conductive. Ubukhulu obulinganiselwe obulinganisekayo obukhulu, u-dmax, ngo-mm, bungabalwa kusukela kuzibalo:
dmax = 0,8 δ0 (A.3) okungukuthi ububanzi bokujiya bukhawulwa ukujula kokungena okungu-δ0 futhi uma ukujiya kwe-conductive coating kuthuthukiswa, ngeke kube nomthelela kuma-eddy currents akhiqiziwe.
QAPHELA i-dmax kwesinye isikhathi ibizwa ngokuthi “ugqinsi lokugcwala”.