Binciken Kurakurai na Tsarin Mai Binciken Hoto

Binciken Kurakurai na Tsarin Mai Binciken Hoto

Gabatarwa ga Abubuwan da ke Tasirin Kurakurai a TsarinMai gano hoto

Takamaiman abubuwan da za a yi la'akari da su don kuskuren tsari sun haɗa da: 1. Zaɓin sassan:na'urorin photodiodes, amplifiers na aiki, resistor, capacitors, ADCs, ics na samar da wutar lantarki, da kuma tushen ƙarfin lantarki na tunani. 2. Yanayin aiki: Tasirin zafin jiki da danshi, da sauransu. 3. Ingancin tsarin: Kwanciyar hankali na tsarin, aikin EMC.

Binciken Kuskuren Tsarin na Masu Gano Hoto

1. Photodiode: A cikin wanigano hoton lantarkitsarin, tasirin photodiodes akan kurakuran tsarintsarin daukar hotogalibi ana bayyana shi ta waɗannan fannoni:

(1) Jin Daɗi (S)/ Nuni: Rabon ƙaruwar siginar fitarwa (ƙarfin lantarki/hawa) △y zuwa ƙaruwar shigarwa △x wanda ke haifar da ƙaruwar fitarwa △y. Wato, s=△y/△x. Jin Daɗi/nuni shine babban sharadin zaɓin firikwensin. Wannan siga ta bayyana musamman a cikin haɗin kai tsaye na photodiodes azaman hasken rana mai duhu, da kuma a cikin takamaiman bayyanar masu gano hoto azaman ƙarfin hayaniya daidai gwargwado (NEP). Saboda haka, babban bincike na kuskuren tsari yana buƙatar cewa jin daɗin (S)/nuni dole ne ya fi ainihin buƙatar kuskuren don biyan buƙatun kuskuren gaba ɗaya na tsarin hasken rana, saboda tasirin kuskuren da abubuwan da aka ambata daga baya suka haifar suma ana buƙatar la'akari da su.

(2) Layi (δL): Matsayin layi na dangantakar adadi tsakanin fitarwa da shigarwar na'urar gano hoto. yfs shine cikakken fitarwa, kuma △Lm shine matsakaicin karkacewar layi. Wannan yana bayyana musamman a cikin ƙarfin haske na layi da cikakken haske na na'urar gano hoto.

(3) Kwanciyar hankali/Maimaitawa: Na'urar gano hoto tana da rashin daidaiton fitarwa ga shigarwar bazuwar iri ɗaya, wanda kuskure ne na bazata. Ana la'akari da matsakaicin karkacewar bugun gaba da na baya.

(4) Hysteresis: Abin da ke faruwa inda lanƙwasa na halayen shigarwa da fitarwa na na'urar gano hoto ba sa haɗuwa yayin tafiyarsa ta gaba da ta baya.

(5) Juyawan zafin jiki: Tasirin kowane canjin zafin jiki na 1℃ akan canjin fitarwa na na'urar gano hoto. Juyawan juyawan zafin jiki △Tm wanda juyawan zafin jiki ya haifar ana ƙididdige shi ta hanyar lissafin juyawan zafin jiki na kewayon zafin jiki na yanayin aiki △T.

(6) Guguwar lokaci: Abin da ke faruwa inda fitowar na'urar gano hoto ke canzawa a tsawon lokaci lokacin da canjin shigarwar ya kasance ba ya canzawa (musabbabin galibi suna faruwa ne saboda canje-canje a cikin tsarin abun da ke ciki). Ana ƙididdige cikakken tasirin karkacewar na'urar gano hoto akan tsarin ta hanyar jimlar vector.

2. Amplifiers na aiki: Maɓallan Maɓalli da ke Shafar Kuskuren Tsarin Amplifiers na Aiki Ƙarfin wutar lantarki mai kaifi Vos, Vos zafin jiki mai kaifi, Ios na yanzu mai kaifi, Ios zafin jiki mai kaifi Ios, Ib na yanzu mai kaifi Ib, impedance na shigarwa, ƙarfin shigarwa, hayaniya (hayaniyar ƙarfin lantarki na shigarwa, hayaniyar halin yanzu) Hayaniyar zafi mai gain ƙira, rabon ƙin samar da wutar lantarki (PSRR), rabon ƙin yarda na yanayin gama gari (CMR), riba mai buɗewa (AoL), samfurin bandwidth mai gain (GBW), ƙimar kashewa (SR), lokacin kafawa, jimillar karkacewar jituwa.

Duk da cewa sigogin amplifiers na aiki suna da mahimmanci a cikin tsarin kamar zaɓin photodiodes, saboda ƙarancin sarari, ba za a yi cikakken bayani game da takamaiman ma'anoni da bayanin sigogi a nan ba. A cikin ainihin ƙirar masu gano hoto, ya kamata a kimanta tasirin waɗannan sigogi akan kurakuran tsari. Kodayake ba duk sigogi ba ne na iya yin tasiri mai mahimmanci akan buƙatun aikin ku, dangane da ainihin yanayin aikace-aikacen da buƙatu daban-daban, sigogin da ke sama za su yi tasiri daban-daban akan kurakuran tsari.

Akwai sigogi da yawa don amplifiers na aiki. Ga nau'ikan sigina daban-daban, manyan sigogin da ke haifar da kurakurai na tsari ana iya mai da hankali kan siginar DC da AC: Siginar DC mai canzawa Voltage na shigarwa Vos, draft na zafin jiki na Vos, Ios na yanzu na shigarwa, bias current Ib, impedance na shigarwa, hayaniya (hayaniyar ƙarfin lantarki na shigarwa, hayaniyar halin yanzu na shigarwa, hayaniyar zafi na ƙira), rabon ƙin samar da wutar lantarki (PSRR), rabon ƙin yarda na yanayin gama gari (CMRR). Siginar bambancin AC: Baya ga sigogin da ke sama, ana kuma buƙatar la'akari da waɗannan masu zuwa: ƙarfin shigarwa, riba na buɗewa (AoL), samfurin bandwidth na riba (GBW), ƙimar kashewa (SR), lokacin kafawa, da jimillar karkacewar jituwa.