Umhlahlandlela Wokuklama Nokukhiqiza we-PCB Monitor we-CO2 ophathwayo

I -PCB ye-CO2 monitor ephathekayo kufanele isekele ukulinganiswa kwegesi okunembile ngenkathi isebenza ngaphakathi kwe-enclosure encane esebenza ngebhethri equkethe nama-processor, ama-display, ama-charging circuits, kanye nemikhiqizo eminingi, ama-wireless radio. Lawo mabhulokhi angadala ukushisa, ahlinzeke ngama-transient kanye nomsindo we-electromagnetic othinta indawo ezungeze inzwa. Kumaqembu obunjiniyela, ibhodi ngakho-ke aliyona nje isilawuli: liyingxenye yesistimu yokulinganisa.

Indlela yokukhiqiza kufanele ilandele ukwakheka kwenzwa okukhishwe. Isikrini esakhelwe eduze kwemojuli ye-NDIR equkethe i-UART noma i-I²C singaba lula kakhulu, kuyilapho ipulatifomu encane yokuzwa ngokwezifiso ingabeka umthwalo wemfanelo owengeziwe kwi-PCB eyinhloko wokuqina kwamandla, isinxephezelo, ukuhamba komoya okwenziwe ngomshini kanye nokuphathwa kokulinganisa. I-Highleap Electronics ingakhiqiza imiklamo ye-PCB ne-PCBA ephethwe ngamakhasimende, izingxenye zomthombo, ihlanganise ama-prototypes kanye nezindawo zokukhiqiza, futhi yenze izinhlelo noma izivivinyo zokusebenza ezichazwe ngamakhasimende ngaphandle kokusho umthwalo wemfanelo womklamo wethuluzi eliqediwe noma isitifiketi salo semvelo.

Izigaba ezingezansi zigxile ezinqumweni ezithinta ukwenziwa kwe-PCB, ukuhlanganiswa kwe-PCB kanye nokuphindaphindwa kokukhiqiza: ukuhlanganiswa kwenzwa, ukubekwa kokushisa, ukuhamba komoya, amandla omsindo ophansi, ukuhlanganiswa, ukutholakala kwezingxenye, imingcele yokuhlola kanye nemibhalo ye-RFQ.

Ukwakhiwa Komkhiqizo We-CO2 Monitor Ephathekayo kanye Nobubanzi Besistimu

Iningi labathengi abafuna i-PCB ye-CO2 monitor ephathekayo abafuni incazelo yokuzwa kwe-carbon-dioxide. Ngokuvamile bazama ukuxazulula inkinga yokuhlanganiswa kwehadiwe noma yokuthola: indlela yokuxhuma inzwa yegesi ngokuthembekile, ukugcina impilo yebhethri yamukelekile, ukufaka ibhodi endaweni ebiyelwe, nokusuka ku-PCBA yesibonelo uye ekukhiqizweni okuphindaphindwayo. Ngakho-ke isihloko sobunjiniyela esiwusizo siqala kusukela ekwakhiweni kwezakhiwo kunokuba sisuke emfundweni ejwayelekile yekhwalithi yomoya wangaphakathi.

Ibhodi elijwayelekile lingase libe ne-MCU, ishaja yebhethri, izilawuli ze-voltage, isixhumi sesibonisi, izinkinobho, i-buzzer, ama-LED esimo, imemori kanye ne-BLE noma i-Wi-Fi circuitry yokuzikhethela. Inzwa ye-CO2 ingase ihlanganiswe ngqo, ifakwe ngamaphini, ifakwe ngekhebula, noma iphathwe njengemojuli engashintshwa. Ukuzwa kwezinga lokushisa kanye nomswakama kungase kube khona ngoba umkhiqizo usebenzisa lezo zilinganiso zokubonisa, isinxephezelo noma umongo wemvelo.

Ukuhlanganiswa Kwezinzwa ze-NDIR, Ukuhamba Komoya kanye Nokubekwa Kwe-Thermal

Izinzwa ze-NDIR zilinganisa i-CO2 ngokubona futhi amamojula amaningi ezentengiselwano aveza izixhumi zedijithali kunesignali ye-analog engahluziwe esezingeni eliphansi. Lokho kwenza kube lula i-PCB yomphathi, kodwa akususi imingcele yemishini. Inzwa kumele isabele umoya omele indawo, futhi indawo ebiyelwe akumele ibambe umoya oshisayo ozungezile. Inzwa ebekwe eceleni kwe-IC yeshaja, isibonisi esikhanyayo noma isilawuli sokushintsha ingasebenza endaweni yokushisa yendawo ehlukile ekamelweni umkhiqizo ohlose ukulilinganisa.

Ukufakwa kwenzwa kuyindlela yokukhiqiza kanye nokukhetha kokuklama

Ezinye izinzwa ze-CO2 ziyahambisana nokucutshungulwa kwe-SMT, kanti ezinye zisebenzisa ama-pin header, ama-through-hole leads, izixhumi zebhodi noma izintambo. Imikhawulo yokugcina, ukugoqa kanye nokugoqa kabusha komkhiqizi wengxenye kufanele ichaze inqubo. Umhlinzeki we-PCBA akufanele acindezele ngokuzenzakalelayo imojuli enkulu ye-optical ngephrofayili efanayo yokugoqa kabusha esetshenziselwa i-MCU ngoba nje indawo enyathelisiwe ibonakala ingagoqwa. Uma imojuli ifakiwe ngemuva kokugoqa kabusha, umdwebo wokuhlanganisa kufanele usho ukulandelana kokufakwa, ukuma, ihadiwe kanye nanoma yimiphi imikhawulo yokugoqa ngesandla.

Izindawo zokungena komoya kanye nezindawo zokugcina umoya zidinga ukusinda ku-DFM

Umklamo kagesi ungaba olungile ngenkathi imonitha yokugcina isebenza kabi ngoba indawo evalekile ivimba ukungena kwenzwa noma i-gasket ye-foam ishintsha ukuhamba komoya. I-PCB DFM kufanele igcine ukugcinwa komshini eduze kwezikhala zenzwa, ama-vent kanye nemigodi ebonakalayo. Amathebhu ephaneli, imigodi yamathuluzi, ukumbozwa kwe-conformal kanye nezinqubo zokuhlanza kufanele futhi kubuyekezwe ukuze kungangcolisi noma kuvimbele indlela yokuzwa. Isexwayiso esifanayo sisebenza kuma-glue nezinto zokufaka izitsha eduze kwenzwa.

Izinzwa zokushisa nomswakama zifanelwe ukubuyekezwa kwazo kokubekwa. Uma zihloselwe ukumela izimo ze-ambient, ukuzifaka eduze kweshaja yebhethri, i-MCU noma i-RF power amplifier kungaletha ukuthambekela kokuzifudumeza. Emikhiqizweni emincane, onjiniyela bangasebenzisa ukubekwa kwebhodi, ama-cutout, izici zokuhlukanisa ukushisa noma imijikelezo yomsebenzi elawulwayo, kodwa indlela efanele incike esiqondisweni somthengisi we-enclosure kanye ne-sensor kunokuba kuncike emthethweni we-PCB ojwayelekile.

Amandla Anomsindo Ophansi, Ukubeka Isisekelo kanye Nokuphathwa Kwebhethri

Amamonitha aphathekayo ahlanganisa uhlelo oluncane lokuzwa nemithwalo eminingana enomsindo noma eshaywayo. Ukushaja kwe-USB, i-buzzer, isibani sangemuva sokubonisa, i-transmitter engenantambo kanye ne-switching converter konke kungadala izinyathelo zamanje. Inzwa ye-CO2 ngokwayo ingadonsela futhi ugesi ophezulu ohlukile kakhulu kunesilinganiso sayo sesikhathi eside. Ngakho-ke, ukwakheka kwamandla kufanele kuhlolwe ngokumelene nesidingo esiphezulu, hhayi nje inani elimaphakathi elisetshenziswa kuspredishithi yempilo yebhethri.

Ukuhlukanisa indawo kufanele kulandele izincomo zabakhiqizi bezingxenye, ngezihibe zamandla ezimfushane kanye nezindlela zokubuyisa eziphansi. Uma inzwa idinga umzila ohlanzekile kakhulu, abaklami bangasebenzisa ukuhlunga, umlawuli ozinikele noma i-LDO ngemuva kwesiguquli sokushintsha. Lokho kukhetha kuyindlela yokushintshana: i-LDO inganciphisa umsindo wokushintsha kodwa ichitha amandla lapho ukwehla kwamandla kagesi kukhulu, kuyilapho isiguquli se-DC-DC sithuthukisa ukusebenza kahle kodwa sethula imiphetho yokushintsha okumele ilawulwe ngokubeka kanye nokuhlelwa.

Ungahlukanisi isisekelo ngelebula kuphela

Iphutha elivamile ukudala “umhlabathi we-analog,” “umhlabathi wedijithali” kanye “neziqhingi zomhlaba wenzwa” ngaphandle kokuqonda ukuthi imisinga ibuya kuphi. Kwabaningi abaklama ukuqapha, indiza yokubhekisela eqhubekayo enokubekwa ngamabomu kwezihibe ezinomsindo inikeza ukuziphatha okubikezelwayo kakhulu kunethusi lomhlaba eliqhekekile. Uma umthengisi wenzwa ecacisa ilungiselelo elithile lokumisa, lowo mklamo wokubhekisela kufanele uthathe indawo yokuqala. Inqubo ye-DFM yomhlanganisi kufanele futhi igweme ukwengeza ukuthululwa kwethusi noma ukuhambisa ama-vias okubuyisa ezindaweni ezizwela ugesi ngaphandle kwemvume yomklamo.

Ukushaja ibhethri nakho kuyinkinga yokushisa

Ukushaja iseli elincane le-Li-ion noma i-LiPo ngaphakathi kwe-enclosure evalwe kungakhuphula izinga lokushisa lendawo. Ishaja, ama-FET okuvikela kanye nezingxenye zendlela yamandla kufanele kubekwe kucatshangelwa kokubili ukuziphatha kukagesi kanye nokushisa. Uma kusetshenziselwa inzwa yokushisa ukubika ngemvelo, ithimba kufanele lihlole umkhiqizo ngenkathi lishaja, ngemva kokushaja kanye nangesikhathi somsebenzi ongenantambo. Ibhodi elilinganisa ngokunembile ebhentshini lingase liziphathe ngendlela ehlukile lapho kufakwa ibhethri langempela kanye ne-enclosure.

I-PCB enezingqimba ezimbili vs ezinezingqimba ezine, i-FR-4 kanye nokuqedwa kobuso

Akukho sibalo sezendlalelo esinqunyiwe semonitha ye-CO2 ephathekayo. Umklamo olula osekelwe kumojuli ungavame ukuhanjiswa ngezendlalelo ezimbili uma indawo yebhodi inkulu futhi izidingo ze-RF noma zokubonisa ziphansi. Ukwakhiwa kwezingqimba ezine kuba kuhle kakhulu uma umkhiqizo uncane, uqukethe ukuxhumana okungenantambo, udinga ukubhekisela komhlaba okuqhubekayo, noma unezizinda zamandla eziningana kanye nezixhumi ezixineneyo.

I-FR-4 ejwayelekile ifanelekela izikrini eziningi eziphathwayo. Ukukhethwa kwezinto kufanele kuqondiswe izinga lokushisa, ukujiya komshini, izidingo ze-dielectric kanye nendawo yomkhiqizo. Ngokufanayo, isisindo sethusi kufanele sikhethwe ezidingweni zamanje zamanje nezokushisa kunokuba sikhethwe enkolelweni yokuthi umkhiqizo wesenzi esiphathwayo udinga ithusi elisindayo ngokungavamile.

I-PCBA ye-CO2 Monitor ephathekayo: I-SMT, Izixhumi kanye Nokuthola Izinto Eziyingxenye

I-assembly ingaxuba izingxenye zedijithali eziqondile namamojula amakhulu ngokwemishini. Izingxenye ezijwayelekile ze-SMT zifaka i-MCU, ishaja, abalawuli, inkumbulo, inzwa yomswakama kanye nama-passives. I-USB-C, izixhumi ze-FPC zesibonisi, izixhumi zebhethri kanye nama-header ebhodi nebhodi aqala ngezingozi ezahlukene ze-solder-joint kanye nezemishini. Imojula ye-CO2 ngokwayo ingadinga inqubo yesibili ngemva kokugeleza kabusha kwe-SMT eyinhloko.

Ukuhlela i-stencil kanye nokugeleza kabusha kufanele kubonise isethi yezingxenye ezixubile

I-QFN ye-thermal-pad ingadinga ivolumu yokunamathisela elawulwa ngokucophelela, kuyilapho isixhumi se-USB-C singadinga amajoyinti e-anchor aqinile kanye nokudluliswa okuhle kokunamathisela ku-geometry ye-pad ehluke kakhulu. Inzwa enkulu ye-optical ingafihla izingxenye ezincane noma idale isisindo sokushisa. Ngakho-ke, ukwakheka kwamaphaneli kanye nokuqondiswa kwezingxenye kungathinta isivuno sokuhlangana. Lena yimibuzo yakudala ye-DFM/DFA exazululwa kangcono ngaphambi kokuba i-prototype yokuqala ikhishwe kunangemva kokuba ibhetshi enevolumu ephansi ibonise izixhumi ezihlala ziphakathi noma ama-passive aqoshiwe.

Ukulawulwa kwe-BOM kubaluleke kakhulu ezigabeni zenzwa, amandla kanye nezintambo

Umshini wokuthenga ongeyona ingozi ku-LED yesimo ungase ungamukeleki ekuhlinzekweni kwenzwa, kunethiwekhi yempendulo yomlawuli, kukristalu, kumdlalo we-antenna noma endleleni yokunciphisa ukunemba. I-BOM kufanele iqukathe izinombolo zezingxenye zomkhiqizi kanye nemithetho ehlukile ecacile. Emikhiqizweni yezimboni noma yokuqapha izakhiwo ehlala isikhathi eside, onjiniyela kufanele futhi bahlonze izingxenye ezinengozi yokwabiwa noma yomjikelezo wokuphila ngaphambi kokuzibophezela ekwakhiweni kwemishini okwamukela iphakheji eyodwa engaqondakali kuphela.

Uma kusetshenziswa imodyuli engenantambo, ukubuyekezwa kwemodyuli okuqondile kanye nokucushwa kwe-antenna kufanele kukhiywe ekwakhiweni komkhiqizo. Uma umsebenzi we-RF usetshenziswa ngqo kwi-PCB eyinhloko, inethiwekhi ehambisanayo kanye nesifunda se-antenna kudinga ukulawulwa kokushintsha okunamandla. Kuzo zombili izimo, i-assembler kufanele iphathe izinto ezingafanele zifakwe esikhundleni njengezingxenye ezilawulwayo kunokuba zisebenzise izindleko kahle.

Ukuhlela, Ukuhlolwa Kokusebenza kanye Nokulinganiswa kwe-CO2 Kuyimisebenzi Ehlukile

I-RFQ eguquguqukayo ephezulu idinga umkhawulo wokuhlola ocacile. Ifektri ye-PCBA ingahlela i-firmware, iqinisekise ama-supply rails, ixhumane ne-sensor ye-CO2, isebenzise isibonisi, ihlole izinkinobho kanye ne-buzzer, iqinisekise ukushaja, futhi isebenzise ukuhlolwa kwamanje noma kokuxhumana okuchazwe amakhasimende. Lokho kuhlola kufakazela ukuthi ukuhlanganiswa kwakhiwe kahle. Akuqinisekisi ngokuzenzakalelayo ukunemba kwethuluzi le-CO2 eliqediwe.

Lokho ukuhlolwa kokusebenza kokukhiqiza okungakumboza ngokufanele

• Amandla kagesi kanye nama-voltage amakhulu ezitimela ngaphakathi kwemingcele echazwe ngamakhasimende.
• Ukuhlela i-MCU, inguqulo ye-firmware kanye nokuphathwa kwezinombolo ze-serial.
• Ukuxhumana nezinzwa ze-CO2, izinga lokushisa kanye nomswakama.
• Imisebenzi yokubonisa, i-LED, i-buzzer, inkinobho kanye nesitoreji.
• Ukushaja i-USB kanye nokuziphatha kokuthola ibhethri lapho i-fixture iyisekela khona.
• Ukuhlolwa kokuxhumana kwe-BLE noma kwe-Wi-Fi kusetshenziswa inqubo evunyelwe yikhasimende.

Ukulinganisa kudinga ireferensi echaziwe kanye nomnikazi wenqubo

Uma umkhiqizo udinga ukulinganiswa kwe-zero-point, span, background noma multi-point, i-OEM kufanele ichaze izimo zegesi, isikhathi sokuzinza, imikhawulo yemvelo, imiyalo ye-firmware, ukwakheka kwe-fixture, imikhawulo yokwamukelwa kanye nokulandelela. Amanye amamojula ezinzwa afika efektri elinganisiwe noma esebenzisa imisebenzi yawo yokulungisa; amanye ancike kakhulu ezinqubweni eziseceleni komphathi. Ukukhiqiza akufanele kuqagele. Ukuhamba komsebenzi wokulinganisa kungenziwa yi-PCBA noma umlingani wokugcina kuphela uma ikhasimende lenze inqubo yacaca ngokobuchwepheshe nangesivumelwano.

Lo mehluko uvikela izinhlangothi zombili. Uvumela i-Highleap ukuthi icaphune isikhathi sangempela sokuhlolwa kokukhiqiza ngaphandle kokusikisela ukuthi ukuhlolwa kukagesi okuvamile kufana nesitifiketi sethuluzi noma ukuqinisekiswa kokusebenza kwemvelo.

Indlela Yokunciphisa Izindleko Ze-PCBA Ze-CO2 Monitor Eziphathekayo Ngaphandle Kokuzidela Ukunemba

Ukunciphisa izindleko kusebenza kahle kakhulu uma kususa ubunzima obungadingekile kunokususa umkhawulo wokulinganisa. Izinketho ezibiza kakhulu ngokuvamile akuzona i-PCB engenalutho kodwa inzwa, isibonisi, ibhethri, imodyuli engenantambo, izixhumi kanye nesikhathi sokuhlola ngesandla. Umklamo osindisa amasenti ambalwa ngokuphoqelela izendlalelo ezimbili ungabiza kakhulu uma wandisa ukulungisa iphutha le-EMI, ukulungisa kabusha noma ukubuyiselwa kwensimu.

Sebenzisa ukwakhiwa okulula kakhulu okuvala izidingo zobunjiniyela

Uma ibhodi elinezingqimba ezimbili linikeza umzila owanele, izindlela zokubuyisa kanye nomkhawulo we-EMC, asikho isizathu sokucacisa izingqimba ezine ngoba umkhiqizo ungowezinto zikagesi. Ngokuphambene nalokho, uma izingqimba ezine zenza ibhodi libe lincane, lihlanzeke futhi kube lula ukulikhiqiza, izindleko ezengeziwe zebhodi elingenalutho zingase zifaneleke ngokomnotho. I-HDI, ama-blind vias kanye nama-passive amancane kakhulu kufanele kugcinelwe imingcele yemishini engenakuxazululwa kalula.

Idizayini yokufuna nokuhlanganisa okuzenzakalelayo

Ukuhlanganisa amanani angasebenzi, ukukhetha izingxenye ezinikezayo okuzinzile, ukugwema izinhlobo zokuxhuma ezingadingekile nokugcina i-polarity/orientation icacile ngokubonakalayo kunganciphisa kokubili izindleko zokuthenga kanye namaphutha okukhiqiza. Uma i-NDIR module ibiza kakhulu, ukwakhiwa okuhleliwe kungacatshangelwa: okokuqala qinisekisa i-PCBA eyisisekelo, bese ufaka inzwa yenani eliphezulu ngemuva kokuba ibhodi selidlulile ekuhlolweni kukagesi okuyisisekelo.

Nciphisa umjikelezo wokuhlola ngaphandle kokunciphisa ukumbozwa

Isibonelo Sokukhiqiza: I-DFM, Ukuthembeka kanye Nokulawula Ushintsho

Iphrothokholi yokuqala kufanele iphathwe njengokwakhiwa kokufunda kobunjiniyela, hhayi njengenguqulo encane yokukhiqizwa kwevolumu. Amaqembu ehadiwe kufanele ahlole ukuhamba komoya kwenzwa, ukushisa kokushaja, amandla okulala, ukuphazamiseka kwesibonisi, ukuhlala ndawonye okungenantambo kanye nokulingana komshini ngenkathi esenenkululeko yokushintsha i-PCB kanye ne-enclosure. Isihloko sokuqala kufanele siqinisekise nokuthi ukufinyelela kohlelo, izindawo zokuhlola kanye nokuqondiswa kwesixhumi kuyasebenza efektri.

Ukukhiqizwa kwe-pilot kushintsha ukugxila ekuphindaphindweni. I-BOM kufanele iqandiswe ngokwanele ukuze kutholakale ezinye izindlela ezivunyelwe. Ukufakwa kwe-PCB, ukuqeda kanye nokufakwa kwamaphaneli kufanele kubhalwe phansi. Izinguqulo ze-Fixtures kanye ne-firmware kufanele zilawulwe. Uma izinhlobo eziningana zomkhiqizo zine-PCB efanayo, amamojula azo enzwa ahlukene, izibonisi noma imiphakathi engenantambo kufanele imelwe ku-matrix ecacile ye-SKU kunokuba iphathwe ngamanothi angakahleleki.

Uma ivolumu iphezulu, ukushintshashintsha kwezingxenye ezingenayo kanye nokunyakaza kwenqubo kuba okubaluleke kakhulu. Izidingo zokulandelela kufanele zihambisane nengozi yokuhweba yomkhiqizo: amanye amaqembu adinga kuphela amarekhodi amaningi kanye nokubuyekezwa, kuyilapho amanye edinga ukuhlukaniswa kweyunithi ngayinye kanye nezihlonzi zezinzwa. Lezo zidingo zithinta ikhotheshini kanye nokuhamba komsebenzi kwefektri, ngakho-ke kufanele zidalulwe ngaphambi kokukhiqizwa kunokuba zengezwe ngemuva kokuthi umugqa usulungisiwe.

Indlela Yokukhetha Umkhiqizi Wokuhlanganisa we-PCB Weziqaphi Ze-CO2 Eziphathekayo

Umhlinzeki onekhono akadingi ukuklama i-algorithm ye-CO2 ukuze angeze inani. Udinga ukuqonda ukuthi yimiphi imininingwane yokukhiqiza engaphazamisa uhlelo lokulinganisa olukhishwe nokuthi yiziphi izinguquko ezidinga ukuvunyelwa kobunjiniyela. Lokho kusho ukubuyekeza ukufakwa kwenzwa, ukugcinwa okuhlobene nokugeleza komoya, ukuhlanganiswa kwe-SMT/THT okuxubile, ukushisa kweshaja, izifunda ze-RF, imishini yokuxhuma, ukufakwa esikhundleni se-BOM kanye nokufinyelela kokuhlolwa kokukhiqiza njengephakheji eyodwa yokukhiqiza.

Ku-Highleap Electronics, ububanzi obusebenzayo bungafaka phakathi ukwenziwa kwe-PCB engenalutho, ukutholakala kwezingxenye, ukuhlanganiswa kwe-SMT, ukuhlanganiswa kwembobo noma isixhumi, ukuhlolwa, ukuhlela kanye nokuhlolwa kokusebenza okuchazwe ngamakhasimende. Ifektri akufanele isho umthwalo wemfanelo wokulinganiswa komkhiqizo wokugcina, ukuvunyelwa komthetho noma ukunemba kokugcina kwemvelo ngaphandle kokuthi inqubo ehlukile efanelekile ichazwe ngokucacile.

Okufanele ukuthumele ukuze uthole i-RFQ enembile

Iphakheji ephelele ivumela umenzi ukuthi asho umsebenzi okhona ngempela. Futhi kunciphisa amathuba okuthi intengo yokuqala ephansi ikhule kamuva ngokusebenzisa izindleko zokufaka inzwa, isikhathi sokuhlela, izinto ezikhethekile noma ukuhlolwa ngesandla okungakaze kuchazwe ku-RFQ yokuqala.

Uma umklamo usulungile, i-Highleap Electronics ingabuyekeza ububanzi be-PCB kanye ne-PCBA ngokumelene nalezo zimfuneko ezikhishwe futhi isekele ukuguquka kusuka ekwakhiweni kobunjiniyela kuya ekukhiqizweni okulawulwayo okuphindaphindiwe.

imibuzo ejwayelekile ukubuzwa

Izidingo zokukhiqiza kufanele ziqinisekiswe ngokuqhathanisa namafayela okuklama akhishwe, izincazelo zabakhiqizi bezingxenye kanye nezimfuneko zokuqinisekiswa noma zomthetho ezisebenzayo zomkhiqizo wokugcina.