I. Chiyambi
Madzi Angayatse Makandulo, Kodi Ndi Zoona?Ndizowona!
Ndizoona kuti njoka zimaopa realgar?Ndi zabodza!
Zomwe tikambirane lero ndi izi:
Kusokoneza kungawongolere kulondola kwa muyeso, sichoncho?
M'mikhalidwe yabwino, kusokoneza ndi mdani wachilengedwe wa kuyeza.Kusokoneza kudzachepetsa kulondola kwa kuyeza.Pazovuta kwambiri, kuyeza sikungachitike mwachizolowezi.Kuchokera pamalingaliro awa, kusokoneza kungawongolere kulondola kwa kuyeza, zomwe ndi zabodza!
Komabe, kodi zimenezi zili choncho nthaŵi zonse?Kodi pali vuto lomwe kusokoneza sikuchepetsa kulondola kwa muyeso, koma m'malo mwake kumawongolera?
Yankho ndi lakuti inde!
2. Mgwirizano Wosokoneza
Kuphatikiza ndi zomwe zikuchitika, timapanga mgwirizano wotsatirawu pa kusokoneza:
- Kusokoneza kulibe zigawo za DC.Muyezo weniweni, kusokoneza kumakhala makamaka kusokoneza kwa AC, ndipo lingaliro ili ndiloyenera.
- Poyerekeza ndi magetsi a DC, matalikidwe a kusokoneza ndi ochepa.Izi zikugwirizana ndi momwe zinthu zilili.
- Kusokoneza ndi chizindikiro cha nthawi, kapena mtengo wake ndi ziro mkati mwa nthawi yokhazikika.Mfundo imeneyi si yoona kwenikweni poyeza.Komabe, popeza kusokoneza nthawi zambiri kumakhala chizindikiro cha pafupipafupi cha AC, pazosokoneza zambiri, tanthauzo la zero ndiloyenera kwa nthawi yayitali.
3. Kulondola muyeso pansi pa kusokonezedwa
Zida zambiri zoyezera zamagetsi ndi mita tsopano zimagwiritsa ntchito zosinthira za AD, ndipo kulondola kwawoko kumagwirizana kwambiri ndi kusintha kwa AD converter.Nthawi zambiri, zosintha za AD zokhala ndi kusamvana kwakukulu zimakhala ndi kuyeza kolondola kwambiri.
Komabe, kuthetsa kwa AD kumakhala kochepa nthawi zonse.Pongoganiza kuti kusintha kwa AD ndi 3 bits ndipo mphamvu yoyezera kwambiri ndi 8V, chosinthira cha AD ndi chofanana ndi sikelo yogawidwa m'magawo 8, gawo lililonse ndi 1V.ndi 1v.Zotsatira za muyeso wa AD iyi nthawi zonse zimakhala zowerengeka, ndipo gawo la decimal nthawi zonse limanyamulidwa kapena kutayidwa, zomwe zimaganiziridwa kuti zimatengedwa mu pepala ili.Kunyamula kapena kutaya kungayambitse zolakwika muyeso.Mwachitsanzo, 6.3V ndi yaikulu kuposa 6V ndi zosakwana 7V.Zotsatira za muyeso wa AD ndi 7V, ndipo pali cholakwika cha 0.7V.Timatcha cholakwika ichi AD quantization error.
Kuti tiwunike mosavuta, timaganiza kuti sikelo (AD converter) ilibe zolakwika zina kupatula cholakwika cha AD quantization.
Tsopano, timagwiritsa ntchito masikelo awiri ofanana kuti ayeze ma voltages awiri a DC omwe akuwonetsedwa pa Chithunzi 1 popanda kusokoneza (mkhalidwe wabwino) komanso kusokoneza.
Monga momwe tawonetsera pa Chithunzi 1, magetsi enieni a DC ndi 6.3V, ndipo magetsi a DC kumanzere alibe zosokoneza, ndipo ndi mtengo wokhazikika.Chithunzi chomwe chili kumanja chikuwonetsa mphamvu yachindunji yomwe ikusokonezedwa ndi kusinthasintha, ndipo pali kusinthasintha kwina kwa mtengo.Magetsi a DC omwe ali pachithunzi chakumanja ndi ofanana ndi ma voliyumu a DC omwe ali pachithunzi chakumanzere atachotsa chizindikiro chosokoneza.Malo ofiira pachithunzichi akuyimira zotsatira za kutembenuka kwa AD converter.
Voltage yabwino ya DC popanda kusokonezedwa
Ikani mphamvu yamagetsi yosokoneza ya DC yokhala ndi mtengo wa ziro
Pangani miyeso 10 yachindunji pazigawo ziwiri zomwe zili pamwambapa, ndiyeno muyese miyeso 10.
Sikelo yoyamba kumanzere imayesedwa ka 10, ndipo zowerengera zimakhala zofanana nthawi iliyonse.Chifukwa cha vuto la AD quantization, kuwerenga kulikonse ndi 7V.Pambuyo pa miyeso 10, zotsatira zake zimakhala 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 zoipa za kusokoneza voteji ndi matalikidwe, AD quantization cholakwika ndi osiyana pa mfundo muyeso osiyana.Pakusintha kwa cholakwika cha AD quantization, zotsatira za kuyeza kwa AD zikusintha pakati pa 6V ndi 7V.Miyezo isanu ndi iwiri inali 7V, itatu yokha inali 6V, ndipo avareji ya miyeso 10 inali 6.3V!Cholakwika ndi 0V!
M'malo mwake, palibe cholakwika chomwe sichingachitike, chifukwa mdziko lazolinga, palibe 6.3V yolimba!Komabe, pali:
Ngati palibe kusokoneza, popeza zotsatira za muyeso uliwonse ndizofanana, pambuyo pa miyeso ya 10, cholakwikacho sichinasinthe!
Pakakhala kusokoneza koyenera, pambuyo poti miyeso ya 10 yawerengedwa, cholakwika cha AD quantization chimachepetsedwa ndi dongosolo la kukula!Chigamulocho chikuwongoleredwa ndi dongosolo la kukula!Kulondola kwa muyeso kumawongoleredwa ndi dongosolo la kukula kwake!
Mafunso ofunikira ndi awa:
Ndi chimodzimodzi pamene voteji kuyeza ndi mfundo zina?
Owerenga angafune kutsatira pangano pa kusokoneza mu gawo lachiwiri, kufotokoza kusokonezedwa ndi mndandanda wa manambala makhalidwe, superimpose kusokoneza pa voteji kuyeza, ndiyeno kuwerengera zotsatira muyeso wa mfundo iliyonse malinga ndi kunyamula mfundo ya AD converter. , ndiyeno kuwerengera mtengo wapakati wotsimikizira, malinga ngati kusokoneza matalikidwe kungayambitse kuwerenga pambuyo pa AD quantization kusintha, ndipo sampuli yafupipafupi imakhala yokwanira (kusokoneza amplitude kusintha kumakhala ndi njira yosinthira, osati mikhalidwe iwiri ya zabwino ndi zoipa. ), ndipo kulondola kuyenera kuwongoleredwa!
Zitha kutsimikiziridwa kuti malinga ngati voteji yoyezera siiwerengeka (ilibe m'dziko lothandizira), padzakhala cholakwika cha AD quantization, ziribe kanthu kuti vuto la AD quantization ndi lalikulu bwanji, bola ngati matalikidwe a kusokoneza kumakhala kwakukulu kuposa cholakwika cha AD quantization kapena chachikulu kuposa chigamulo chochepa cha AD, chidzachititsa kuti zotsatira zoyezera zisinthe pakati pa zikhalidwe ziwiri zoyandikana.Popeza kusokoneza ndi zabwino ndi zoipa symmetric, kukula ndi mwayi wa kuchepa ndi kuwonjezeka ndi ofanana.Choncho, pamene mtengo weniweniwo uli pafupi ndi mtengo wake, mwayi wa mtengo womwe udzawonekere ndi waukulu, ndipo udzakhala pafupi ndi mtengo womwe utatha.
Ndiko kuti: mtengo wamtengo wapatali wa miyeso yambiri (kusokoneza kutanthawuza mtengo ndi ziro) kuyenera kukhala pafupi ndi zotsatira zoyezera popanda kusokonezedwa, ndiko kuti, kugwiritsa ntchito chizindikiro chosokoneza cha AC chokhala ndi mtengo wapatali wa ziro ndi miyeso yambiri yomwe ingachepetse kufanana kwa AD Quantize. zolakwika, sinthani kusintha kwa muyeso wa AD, ndikuwongolera kulondola kwa muyeso!
Nthawi yotumiza: Jul-13-2023
