Eddy halin yanzu tsara a cikin wani karfe madugu

A.1 Jiniral

Kayan aikin Eddy na yanzu suna aiki akan ƙa'idar cewa babban filin lantarki na lantarki wanda tsarin bincike na kayan aiki zai haifar zai haifar da igiyoyin ruwa a cikin madubin lantarki wanda aka sanya binciken a kai. Waɗannan magudanan ruwa suna haifar da canjin girman girman da/ko lokacin ƙwaƙƙwaran binciken coil impedance, wanda za'a iya amfani dashi azaman ma'auni na kauri na rufi akan madubin (duba Misali 1) ko na jagorar kanta (duba Misali 2). ).

Hoto A.1 yana wakiltar tsararraki na yanzu a cikin madugu na ƙarfe kuma Hoto A.2 wakilcin vector ne
na eddy halin yanzu tsara.

Hanyar eddy na yanzu mai girman girman girman ta ya fi dacewa da auna ma'aunin suturar da ba ta da ƙarfi akan ƙarfe mara ƙarfi (duba Misali 1) amma kuma don ƙyale waɗanda ba na maganadisu ba. karfe rufi a kan kayan da ba su da ƙarfi (duba Misali 2). Hanyar eddy mai saurin lokaci (duba TS EN ISO 21968) ya fi dacewa da auna ma'aunin ƙarfe mara ƙarfi akan kayan ƙarfe ko waɗanda ba ƙarfe ba (duba Misali 2) musamman idan an auna murfin ƙarfe ta fenti ko ma'aunin marar lamba yana wajaba, watau diyya "Dage-off" ya zama dole.

A.2 Misali na 1 - Rubutun da ba ya aiki akan kayan aiki mai mahimmanci

A wannan yanayin da eddy halin yanzu yawa ne kawai ƙaddara ta nisa tsakanin bincike da tushe karfe, watau shafi kauri. Domin cimma wannan tushe abu ya fi kauri fiye da ƙaramin kauri na tushe. Wannan ƙaramin kauri, dmin, a cikin mm, ana iya ƙididdige shi azaman (duba 5.3.): dmin = 2,5 δ0 (A.2)
Idan tushen kauri ya kasance ƙasa da wannan ƙaramin kauri, dmin, ƙimar ƙimar kauri mai rufi za a shafa.

A.3 Misali na 2 - Rubutun sarrafawa akan abin da ba ya aiki

A wannan yanayin ƙarancin halin yanzu yana ƙayyade kawai ta kauri na rufin gudanarwa. Matsakaicin matsakaicin kauri mai aunawa, dmax, a cikin mm, ana iya ƙididdige shi daga lissafin:
dmax = 0,8 δ0 (A.3) watau kewayon kauri yana iyakance ta zurfin shigar δ0 kuma idan an ƙara kauri mai ɗaukar nauyi, ba zai ƙara yin tasiri akan igiyoyin eddy da aka haifar ba.
NOTE dmax wani lokaci ana kiransa “jikewar kauri”.