Ihe ngbanwe fotoelectric bụ ihe mmetụta nke na-atụgharị mgbagharị geometric n'ibu na ogwe mmepụta ka ọ bụrụ mkpụrụ akụ ma ọ bụ ọnụọgụ dijitalụ site na ntụgharị fotoelectric, ma bụrụ ihe mmetụta kachasị eji. Ihe ngbanwe fotoelectric izugbe bụ nke mejuputara diski grating na ngwaọrụ nchọpụta fotoelectric. Na usoro servo, ebe ọ bụ na fotoelectric encoder bụ coaxial na moto, mgbe moto na-agbagharị, grating disk na-agbagharị n'otu ọsọ ahụ dị ka moto. Ngwa nchọpụta nke nwere ọkụ{3} na-emitting diode na ngwa eletrọnịkị ndị ọzọ na-achọpụta ma wepụta ọtụtụ mgbama pulse. Enwere ike igosi ọsọ moto dị ugbu a site n'ịgbakọ ọnụ ọgụgụ nke mmepụta nke fotoelectric encoder kwa nkeji. Na mgbakwunye, iji chọpụta ntụzịaka nke ntụgharị, ihe ngbanwe ahụ nwekwara ike ịnye nsonaazụ koodu anya chanel abụọ- nwere ihe dị iche nke ogo 90, wee chọpụta ngbanwe nke moto dabere na mgbanwe steeti nke koodu ọnụọgụ ọnụọgụ abụọ- chanel. Dịka ụkpụrụ nchọpụta siri dị, enwere ike kewaa ihe ngbanwe ka ọ bụrụ ngwa anya, magnetik, inductive na capacitive. Dị ka usoro ọnụ ọgụgụ ya si dị na ụdị mmepụta mgbaàmà, enwere ike kewaa ya ụzọ atọ: mmụba, zuru oke na ngwakọta.
Ntinye koodu ntinye
Mgbakwunye encoders na-eji kpọmkwem ụkpụrụ nke photoelectric ntughari ka mpụta atọ tent nke square ife pulses A, B na Z agba; A na B abụọ tent nke pulses nwere a na-adọ ọdịiche nke 90 ogo , nke mere na ntụziaka nke ntụgharị nwere ike mfe ikpe ikpe, na Z na-adọ bụ kwa mgbanwe Otu usu na-eji maka ntụaka n'ọnọdu. Uru ya bụ usoro dị mfe, nkezi ndụ ọrụ nke ihe karịrị iri puku kwuru iri puku awa, ikike mgbochi siri ike-, ntụkwasị obi dị elu, yana dabara adaba maka nnyefe ogologo-. Ihe ọghọm bụ na ozi ọnọdụ zuru oke nke ntụgharị aro enweghị ike ịpụta.
Ihe ngbanwe zuru oke
Ihe ngbanwe zuru oke bụ ihe mmetụta na-ewepụta ọnụọgụ dijitalụ ozugbo. Enwere ọtụtụ egwu koodu concentric n'akụkụ ụzọ radial na diski koodu okirikiri ya. Ihe mejupụtara egwu ọ bụla bụ mpaghara ọkụ{2} na-ebufe ma na-adịghị ahụkebe. Ndị na-akwado ọwa koodu dị n'akụkụ ọnụọgụ mpaghara bụ mmekọrịta okpukpu abụọ. Ọnụ ọgụgụ nke ọwa koodu na wiil koodu bụ ọnụọgụ ọnụọgụ abụọ. N'otu akụkụ nke wiil koodu bụ isi iyi ọkụ, ma akụkụ nke ọzọ nwere ihe mmewere foto nke kwekọrọ na ọwa koodu ọ bụla; mgbe wiil koodu dị n'ọnọdụ dị iche iche Mgbe, ihe ọ bụla photosensitive element na-atụgharị a kwekọrọ ekwekọ larịị mgbaàmà dabere ma ọ na-enweta ìhè ma ọ bụ na-enweta, na-etolite a ọnụọgụ abụọ nọmba. Ihe e ji mara ụdị koodu a bụ na ọ dịghị mkpa counter, na koodu dijitalụ edoziri kwekọrọ na ọnọdụ ahụ nwere ike ịgụpụta ya n'ọnọdụ ọ bụla nke ogwe. N'ụzọ doro anya, ka ọwa koodu, ka mkpebi ahụ dị elu. Maka ntinye koodu nwere mkpebi ọnụọgụ abụọ N{9}bit, diski koodu ahụ ga-enwerịrị ọwa koodu N. Enweelarị ngwaahịa ngbanwe zuru oke 21-bit na China.
Ihe ngbanwe zuru oke na-eji usoro ọnụọgụ abụọ eke ma ọ bụ ọnụọgụ cyclic (koodu isi awọ) maka ntụgharị fotoelectric. Ọdịiche dị n'etiti ihe ngbanwe zuru oke na ntinye ntinye agbakwunyere bụ usoro ahịrị na-enweghị atụ na opaque na diski ahụ. Ihe ngbanwe zuru oke nwere ike inwe ọtụtụ koodu, yana ọnọdụ zuru oke nwere ike ịchọta dịka koodu dị na diski koodu ọgụgụ. Nhazi koodu ahụ nwere ike ịnakwere koodu ọnụọgụ abụọ, koodu cyclic, koodu nkwado abụọ, wdg. atụmatụ ya pụrụ iche bụ:
Enwere ike ịgụ uru zuru oke nke nhazi nkuku ozugbo; ọ dịghị akwakọba njehie; ozi ọnọdụ agaghị efu mgbe ike kwụsịrị. Otú ọ dị, a na-ekpebi mkpebi ahụ site na ọnụ ọgụgụ nke bits na usoro ọnụọgụ abụọ, nke pụtara na ziri ezi dabere na ọnụọgụ nke ibe.
Ngwakọ zuru oke
Ngwakọ zuru oke, ọ na-ewepụta ozi abụọ dị iche iche: a na-eji otu ozi achọpụta ọnọdụ oghere magnetik, yana ọrụ ozi zuru oke; Ntọala nke ọzọ bụ otu ihe ahụ dị ka ozi mmepụta nke ntinye ntinye agbakwunyere.
