Ajụjụ: Ndị mmadụ na-akpọ TDR "Cable Radar." Kedu ka esi achọpụta mmejọ na-egwupụtaghị?
A: TDR na-eziga mkpụkọ voltaji dị ala{{0}(<100V) and listens for the reflection. Any impedance change causes a bounce-back wave.
Otu esi agụ ihuenyo TDR:
|
Ụdị Waveform |
Pụtara |
Ụdị mmejọ |
|
N'elu (nke ọma) |
Mmetụta → enweghi ngwụcha |
Mepee eriri sekit / ịkpụ |
|
N'ala (Na-adịghị mma) |
Mgbochi → efu |
Obere sekit / Usoro{0}}Ala |
|
Igwe mmiri dị larịị |
Mgbochi bụ mgbe niile |
eriri ahụike |
Ihe mgbagha: Anya=(Ọsọ × Oge) / 2. TDR na-achọta "mkpirisi mkpirisi nwụrụ anwụ" na " waya gbajiri agbaji" n'ụzọ dị mfe.
Kedu ihe bụ "Thumping" (High Voltage Surge)?
Ajụjụ: TDR na-egosi eriri dị mma, mana onye na-agbaji na-aga n'ihu. Gịnị kpatara ya "Thump"?
A: TDR enweghị ike "ịhụ" mgbawa mkpuchi mkpuchi dị elu{{0}. Anyị kwesịrị ịmepụta arc artificial na saịtị mmejọ.
Usoro Thumping:
1. Charge: Akụrụngwa na-ana nnukwu ike ike voltaji - (The Thumper).
2. Mwepu: Na-ewepụta ike n'otu nnukwu usu (dịka, 15 kV) n'ime eriri.
3. The Arc: Pulse kụrụ ntụpọ ahụ ma mepụta Artificial Arc (Flashover).
4. Signal: Arc na-arụ ọrụ dị ka nwa oge dị mkpirikpi, na-egosipụta ụda TDR.