ʻO ka hanauna Eddy i kēia manawa i loko o kahi conductor metala

A.1 General

Ke hana nei nā mea kani o Eddy i kēia manawa ma ka manaʻo o kahi kahua electromagnetic alapine kiʻekiʻe i hana ʻia e ka ʻōnaehana probe o ka mea kani e hana i nā au eddy i loko o kahi conductor uila kahi i kau ʻia ai ka probe. Hoʻololi kēia mau au i ka hoʻololi o ka amplitude a / a i ʻole ka pae o ka impedance coil probe, hiki ke hoʻohana ʻia ma ke ʻano he ana o ka mānoanoa o ka uhi ʻana ma luna o ka conductor (e nānā i ka Laʻana 1) a i ʻole ka conductor ponoʻī (e nānā i ka Laʻana 2 ).

Hōʻike ka Figure A.1 i ka hanauna eddy i kēia manawa i kahi mea hoʻokele metala a ʻo Figure A.2 he hōʻike vector.
o eddy hanauna o keia manawa.

ʻO ke ʻano o ka eddy amplitude-sensitive ʻoi aku ka maikaʻi i ke ana ʻana o nā pale non-conductive ma luna o nā metala kumu ʻole (e nānā i ka Laʻana 1) akā no ka haʻalele ʻole. ke kino nā uhi ma luna o nā mea kumu ʻole (e nānā i ka Laʻana 2). ʻOi aku ka maikaʻi o ke kaʻina hana eddy eddy i kēia manawa (e ʻike i ka ISO 21968) i ke ana ʻana i nā ʻili metala non-magnetic ma luna o nā mea metala a i ʻole nā ​​mea kumu (e nānā i ka Laʻana 2) ʻoiai inā pono ke ana ʻia ka uhi metala ma o ka pena a i ʻole Pono ke ana contactless, ʻo ia hoʻi, pono ka uku "Lift-off".

A.2 Ka Laʻana 1 — ʻO ka uhi ʻole-conductive ma kahi mea conductive kumu

Ma kēia ʻano, ʻike wale ʻia ka mānoanoa o kēia manawa e ka mamao ma waena o ka probe a me ka metala kumu, ʻo ia hoʻi ka mānoanoa o ka uhi. I mea e hoʻokō ai i kēia, ʻoi aku ka mānoanoa o ka mea kumu ma mua o ka mānoanoa kumu haʻahaʻa. ʻO kēia mānoanoa liʻiliʻi, dmin, i mm, hiki ke koho ʻia e like me (e nānā i ka 5.3.): dmin = 2,5 δ0 (A.2)
Inā haʻahaʻa ka mānoanoa kumu ma mua o kēia mānoanoa liʻiliʻi, dmin, e hoʻopili ʻia ka waiwai i ana ʻia o ka mānoanoa uhi.

A.3 Ka Laʻana 2 — ʻO ka uhi hoʻoheheʻe ma luna o kahi mea hana ʻole

I kēia hihia, ʻike ʻia ka mānoanoa o kēia manawa e ka mānoanoa o ka uhi conductive. Hiki ke helu ʻia ka mānoanoa hiki ke ana ʻia, dmax, i mm, mai ka hoohalike:
dmax = 0,8 δ0 (A.3) ʻo ia hoʻi, ua kaupalena ʻia ka mānoanoa e ka hohonu komo δ0 a inā e hoʻonui hou ʻia ka mānoanoa o ka hoʻopili conductive, ʻaʻohe ona mana hou i nā au eddy i hana ʻia.
NOTE kapa ʻia ʻo dmax i kekahi manawa "ka mānoanoa saturation".