I. Chiyambi
Madzi Angayatse Makandulo, Kodi Ndi Zoona? Ndi Zoona!
Kodi n'zoona kuti njoka zimaopa realgar? Ndi zabodza!
Zimene tikambirane lero ndi izi:
Kusokoneza kungathandize kulondola kwa muyeso, sichoncho?
Muzochitika zachizolowezi, kusokoneza ndi mdani wachilengedwe wa muyeso. Kusokoneza kumachepetsa kulondola kwa muyeso. Pazochitika zazikulu, muyeso sudzachitika mwachizolowezi. Kuchokera pamalingaliro awa, kusokoneza kungapangitse kulondola kwa muyeso kukhala bwino, zomwe ndi zabodza!
Komabe, kodi izi zimakhala choncho nthawi zonse? Kodi pali vuto linalake pomwe kusokoneza sikuchepetsa kulondola kwa muyeso, koma m'malo mwake kumawongolera?
Yankho ndi inde!
2. Mgwirizano Wosokoneza
Pogwirizana ndi momwe zinthu zilili, tikugwirizana motere pa kusokoneza:
- Kusokoneza sikukhala ndi zigawo za DC. Muyeso weniweni, kusokoneza makamaka ndi kusokoneza kwa AC, ndipo lingaliro ili ndi lomveka.
- Poyerekeza ndi mphamvu ya DC yomwe yayesedwa, mphamvu ya kusokoneza magetsi ndi yochepa. Izi zikugwirizana ndi momwe zinthu zilili.
- Kusokoneza ndi chizindikiro cha nthawi ndi nthawi, kapena mtengo wapakati ndi zero mkati mwa nthawi yokhazikika. Izi sizikutanthauza kuti ndi zoona muyeso weniweni. Komabe, popeza kusokoneza nthawi zambiri kumakhala chizindikiro cha AC cha pafupipafupi kwambiri, pa kusokoneza kwakukulu, chikhalidwe cha zero chimakhala choyenera kwa nthawi yayitali.
3. Kulondola kwa muyeso pamene mukusokonezedwa
Zipangizo zambiri zamagetsi zoyezera ndi zoyezera tsopano zimagwiritsa ntchito zosinthira za AD, ndipo kulondola kwawo muyeso kumagwirizana kwambiri ndi kulondola kwa chosinthira cha AD. Kawirikawiri, zosinthira za AD zokhala ndi kulondola kwakukulu zimakhala ndi kulondola kwakukulu kwa muyeso.
Komabe, mphamvu ya AD nthawi zonse imakhala yochepa. Poganiza kuti mphamvu ya AD ndi ma bits atatu ndipo mphamvu yamagetsi yoyezera kwambiri ndi 8V, chosinthira cha AD chikufanana ndi sikelo yogawidwa m'magawo 8, gawo lililonse ndi 1V. ndi 1V. Zotsatira za muyeso wa AD iyi nthawi zonse zimakhala nambala yeniyeni, ndipo gawo la decimal nthawi zonse limanyamulidwa kapena kutayidwa, lomwe limaganiziridwa kuti limanyamulidwa mu pepalali. Kunyamula kapena kutaya kungayambitse zolakwika zoyezera. Mwachitsanzo, 6.3V ndi yayikulu kuposa 6V komanso yochepera 7V. Zotsatira za muyeso wa AD ndi 7V, ndipo pali cholakwika cha 0.7V. Timatcha cholakwika ichi kuti cholakwika cha AD quantization error.
Kuti tipeze njira yosavuta yowunikira, tikuganiza kuti sikelo (AD converter) ilibe zolakwika zina zoyezera kupatula cholakwika cha AD quantization.
Tsopano, timagwiritsa ntchito masikelo awiri ofanana poyesa ma voltage awiri a DC omwe akuwonetsedwa pa Chithunzi 1 popanda kusokonezedwa (mkhalidwe wabwino) komanso ndi kusokonezedwa.
Monga momwe zasonyezedwera pa Chithunzi 1, magetsi enieni a DC omwe adayesedwa ndi 6.3V, ndipo magetsi a DC omwe ali pachithunzi chakumanzere alibe kusokoneza kulikonse, ndipo ndi mtengo wokhazikika. Chithunzi chomwe chili kumanja chikuwonetsa magetsi olunjika omwe amasokonezedwa ndi magetsi osinthasintha, ndipo pali kusinthasintha kwina kwa mtengo. Magetsi a DC omwe ali pachithunzi chakumanja ndi ofanana ndi magetsi a DC omwe ali pachithunzi chakumanzere mutachotsa chizindikiro chosokoneza. Sikweya wofiira pachithunzichi akuyimira zotsatira za kusintha kwa AD converter.
Voliyumu yabwino ya DC popanda kusokonezedwa
Ikani magetsi osokoneza a DC okhala ndi mtengo wapakati wa zero
Pangani miyeso 10 ya mphamvu yolunjika m'mikhalidwe iwiri yomwe ili pachithunzi pamwambapa, kenako yesani miyeso 10.
Sikelo yoyamba kumanzere imayesedwa ka 10, ndipo mawerengedwe ake ndi ofanana nthawi iliyonse. Chifukwa cha kulakwitsa kwa AD quantization, kuwerenga kulikonse kumakhala 7V. Pambuyo poyesa ka 10, zotsatira zake zimakhalabe 7V. Cholakwika cha AD quantization ndi 0.7V, ndipo cholakwika cha muyeso ndi 0.7V.
Sikelo yachiwiri kumanja yasintha kwambiri:
Chifukwa cha kusiyana kwa zabwino ndi zoyipa za voltage yosokoneza ndi kukula kwake, cholakwika cha AD quantization chimasiyana pamiyeso yosiyanasiyana. Pansi pa kusintha kwa cholakwika cha AD quantization, zotsatira za muyeso wa AD zimasintha pakati pa 6V ndi 7V. Miyeso isanu ndi iwiri inali 7V, itatu yokha inali 6V, ndipo avareji ya miyeso 10 inali 6.3V! Cholakwikacho ndi 0V!
Ndipotu, palibe cholakwika chomwe sichingatheke, chifukwa m'dziko lopanda tsankho, palibe 6.3V yokhwima! Komabe, palidi:
Ngati palibe kusokoneza, popeza zotsatira zonse zoyezera zimakhala zofanana, pambuyo pa avareji ya miyeso 10, cholakwikacho sichinasinthe!
Pakakhala kusokoneza koyenera, pambuyo poti miyeso 10 yawerengedwa, cholakwika cha AD quantization chimachepetsedwa ndi dongosolo la kukula! Kutsimikiza kumawongoleredwa ndi dongosolo la kukula! Kulondola kwa muyeso kumawongoleredwanso ndi dongosolo la kukula!
Mafunso ofunikira ndi awa:
Kodi ndi chimodzimodzi pamene magetsi oyezedwa ndi zinthu zina?
Owerenga angafune kutsatira mgwirizano wokhudza kusokoneza mu gawo lachiwiri, kufotokoza kusokoneza ndi mndandanda wa manambala, kuyika kusokoneza pa voltage yoyesedwa, kenako kuwerengera zotsatira za muyeso wa mfundo iliyonse motsatira mfundo yonyamula ya AD converter, kenako kuwerengera mtengo wapakati wotsimikizira, bola ngati kusokoneza kungayambitse kusintha kwa kuwerenga pambuyo pa AD quantization, ndipo kuchuluka kwa zitsanzo kumakhala kokwanira (kusintha kwa kusokoneza kumakhala ndi njira yosinthira, m'malo mwa ma values awiri abwino ndi oipa), ndipo kulondola kuyenera kukonzedwa!
Zingatsimikizidwe kuti bola ngati voltage yoyezedwa si nambala yeniyeni (siilipo m'dziko lolunjika), padzakhala cholakwika cha AD quantization, ngakhale cholakwika cha AD quantization chikhale chachikulu bwanji, bola ngati amplitude ya kusokoneza ili yayikulu kuposa cholakwika cha AD quantization kapena yayikulu kuposa resolution yocheperako ya AD, zidzapangitsa kuti zotsatira za muyeso zisinthe pakati pa ma values awiri oyandikana. Popeza kusokoneza kuli kofanana ndi kwabwino ndi koipa, kukula ndi mwayi wochepa ndi kuwonjezeka ndizofanana. Chifukwa chake, pamene mtengo weniweni uli pafupi ndi mtengo uti, mwayi wa mtengo uti udzawonekere ndi waukulu, ndipo udzakhala pafupi ndi mtengo uti pambuyo pa avareji.
Ndiko kuti: mtengo wapakati wa miyeso yambiri (mtengo wapakati wosokoneza ndi zero) uyenera kukhala pafupi ndi zotsatira za muyeso popanda kusokoneza, ndiko kuti, kugwiritsa ntchito chizindikiro cha kusokoneza cha AC chokhala ndi mtengo wapakati wa zero ndi avareji ya miyeso yambiri kungachepetse zolakwika zofanana za AD Quantize, kusintha kutsimikiza kwa muyeso wa AD, ndikuwonjezera kulondola kwa muyeso!
Nthawi yotumizira: Julayi-13-2023
