The main purpose of this test is to verify the resistance to electrostatic discharge (ESD) caused by the proximity or contact of an object or person or device. Shey ama qof ayaa ku ururin kara koronto koronto gudaha danab ka sarreeya 15kv. Waayo -aragnimadu waxay muujinaysaa in guuldarrooyin iyo waxyeello badan oo aan la sharraxin ay u badan tahay inay sababtay ESD. Iyada oo laga soo daayo jilitaanka ESD ilaa dusha iyo agagaarka EUT, aaladda tijaabada (EUT) waxay qabataa waxqabadka ESD. Heerka darnaanta dheecaanka waxaa si cad loogu qeexay heerarka badeecada iyo qorshayaasha imtixaanka EMC ee soo -saaraha diyaariyey. EUT waxay hubisaa cilladaha shaqaynaya ama faragelinta dhammaan hababka hawlgalka. Shuruudaha gudbinta/guuldarraysiga waa in lagu qeexaa qorshaha imtixaanka EMC waxaana go’aamiya soo -saaraha alaabta.

PCB transient conductivity resistance

Ujeeddada ugu weyn ee tijaabadani waa in la xaqiijiyo iska-caabbinta EUT-ga ee naxdinta ku-meelgaarka ah iyo muddada-gaaban oo leh waqti degdeg ah oo kor u kaca oo laga yaabo inay ka dhashaan culeysyo soo-jeedin ama xiriiriyayaal. Waqtiga kor u kaca degdegga ah iyo dabeecadda soo noqnoqota ee garaaca garaaca imtixaankan ayaa ka dhasha dhumucyadan si sahlan u dhexgalaya wareegyada EUT oo laga yaabo inay faragelin ku sameeyaan hawlgallada EUT. Ku -meelgaarka oo si toos ah ugu shaqeeya korontada ugu weyn iyo u -oggolaanshaha khadka calaamadda. Baaritaannada kale ee xasaanadda PCB -ga, EUT waa in lala socdaa ku -dhaaf/dhicis iyadoo la adeegsanayo qaabeynta hawlgalka guud.

U adkaysiga PCB -ga shucaaca electromagnetic

Ujeeddada ugu weyn ee tijaabadani waa in la xaqiijiyo awoodda faragelinta ka-hortagga PCB ee sheyga raadiyaha, gudbiyaha, taleefannada GSM/AMPS, iyo noocyo kala duwan oo elektromagnetic ah oo laga soo saaray ilaha elektromagnetic ee warshadaha. Haddii nidaamka aan la gaashaaman, shucaaca elektromagnetic -ka waxaa lagu dhejin karaa fiilada is -dhexgalka oo laga geli karaa wareegga iyada oo loo marayo waddada gudbinta; Ama waxaa si toos ah loogu dari karaa xarigga wareegga daabacan. When the amplitude of the rf electromagnetic field is large enough, the induced voltage and demodulated carrier can affect the normal operation of the device.

PCB radiation resistance Test run This test run is usually the longest and most difficult, requiring very expensive equipment and considerable experience. In contrast to other PCB immunity tests, success/failure criteria defined by the manufacturer and a written test plan must be sent to the test room. Marka lagu quudinayo EUT duurka shucaaca, EUT waa in lagu meeleeyaa hawlgal caadi ah iyo qaabka ugu xasaasisan.

Hawlgalka caadiga ah waa in lagu sameeyaa qolka imtixaanka marka EUT ay soo gaadho goobihii faragelinta ee darajooyinkoodu ay ka badan yihiin 80MHz ilaa 1GHz inta jeer ee loo baahan yahay. Some PCB anti-interference standards start at 27MHz. Heerka darnaanta heerkani caadi ahaan wuxuu u baahan yahay heerarka iska caabbinta PCB ee 1V/m, 3V/m, ama 10V/m. Si kastaba ha noqotee, tilmaamaha aaladda ayaa laga yaabaa inay lahaadaan shuruudo u gaar ah “inta jeer ee dhibaatada (faragelinta)”. The appropriate PCB radiation resistance level of the product is of interest to the manufacturer.

Shuruudaha beerta ee midaysan Heerka iska-caabbinta faragelinta PCB ee cusub EN50082-1: 1997 waxaa loola jeedaa IEC/EN61000-4-3. IEC/EN61000-4-3 waxay u baahan tahay jawi imtixaan oo mideysan oo ku saleysan shaybaarada imtixaanka. The test environment was realized in an anechoic room with tiles arranged with ferrite absorbers to block reflection and resonance in order to establish a unified test site indoors. Tani waxay ka gudubtaa khaladaadka imtixaanka lama filaanka ah ee soo noqnoqda ah ee soo noqnoqda oo ay keenaan milicsiga iyo meelaynta meelaynta ee qolalka aan dhaqanka lahayn. (Qol nus-anechoic ah sidoo kale waa bey’ad ku habboon cabbiridda shucaaca ka baxaysa jawi aan caadi ahayn oo u baahan saxnaan).

Dhismaha qolalka nus-dabaqa ah ee nuugista RF-ga waa in lagu hagaajiyaa derbiyada iyo saqafka qolalka nus-anechoic. Farsamooyinka iyo tilmaamaha nashqadda RF waa inay dejiyaan foornooyinka culus ee ferrite ee saqafka qolka ku yaal. Lebenkii Ferrite wuxuu ku fadhiyaa alaab koronto ku dheggan oo ku dheggan qolka dushiisa. Qol aan qallafsanayn, milicsiga dusha birta ayaa sababi doona is -beddel iyo hirar taagan, kuwaas oo ku abuuraya meelaha ugu sarreysa iyo boholaha xoogga goobta imtixaanka. Heerkulka goobeed ee qol aan caadi ahayn wuxuu noqon karaa 20 ilaa 40dB, tanina waxay sababi doontaa in tijaabada tijaabadu ay u muuqato inay si lama filaan ah ugu fashilanto goob aad u hooseysa. Resonance -ka qolka wuxuu keenaa soo noqnoqoshada imtixaanka oo aad u hooseysa iyo heer aad u sarreeya oo ah “ka -gudub”. (Tani waxay u horseedi kartaa naqshadaynta badeecadda oo aad u badan.) Heerka cusub ee faragelinta ka-hortagga PCB IEC1000-4-3, oo u baahan isla goobtii looga baahnaa, ayaa dib u hagaajiyay cilladahan halista ah.

Qalabka iyo softiweerka loo baahan yahay si loo abuuro goobta imtixaanka ayaa u baahday cod-weyne ballaariyaha RF-ga si uu u wado anteenada gudbinta baaxadda inta jeer ee ka badan 26MHz illaa 2GHz, taas oo 3 mitir u jirtay aaladda la tijaabiyey. Fully automated testing and calibration under software control provides greater flexibility for testing and full control of all key parameters such as scan rate, frequency pause time, modulation and field strength. Jillaabyada softiweerku waxay oggolaadaan is -waafajinta kormeerka iyo kicinta shaqeynta EUT. Astaamaha is-dhexgalka ayaa looga baahan yahay tijaabada dhabta ah si loo suurtogeliyo isbeddelada waqtiga-dhabta ah ee barnaamijka tijaabada EMC iyo xuduudaha EUT. Astaantan gelitaanka adeegsadaha ayaa u oggolaanaysa dhammaan xogta in si dhakhso leh loo qoro qiimeyn wax ku ool ah iyo qaybinta waxqabadka EUT EMC.

Soo -nuugiyeyaasha Ahraamta Dhuuqeyaasha Ahraamta (conical) ee wax -ku -oolka ah ayaa waxtar leh, si kastaba ha ahaatee baaxadda weyn ee Ahraamta ayaa ka dhigaysa mid aan suurtagal ahayn in lagu tijaabiyo Meelaha yaryar ee la isticmaali karo qol. Mowjadaha hoose ee 80MHz, dhererka nuugista Ahraamta waa in lagu yareeyaa 100cm, iyo in lagu shaqeeyo jadwalka hoose ee 26MHz, dhererka nuugga haramka waa inuu ka weynaadaa 2m. Soo -saareyaasha Ahraamta sidoo kale waxay leeyihiin khasaare. Way nugul yihiin, oo si fudud u burburiyeen shil, oo guban kara. Sidoo kale ma aha wax la taaban karo in la isticmaalo nuugiyayaashan dabaqa qolka. Sababtoo ah kululaynta nuugga haramka, xoog duleed oo ka weyn 200V/m muddo wakhti ah ayaa keeni doonta khatar sare oo dab ah.

Ferrite nuugid

Foornooyinka Ferrite si fiican bay u shaqeynayaan, si kastaba ha ahaatee waxay ku daraan culeys weyn saqafka, derbiyada iyo albaabada qolka, sidaa darteed qaab dhismeedka farsamada ee qolka ayaa noqda mid aad muhiim u ah. Waxay si fiican ugu shaqeeyaan jadwalka hoose, laakiin waxay noqdaan kuwo aan waxtar lahayn marka la soo noqnoqonayo 1GHz. Foornooyinka Ferrite aad bay u cufan yihiin (100mm × 100mm × 6mm qaro) waxayna u adkeysan karaan xooga duurka in ka badan 1000V/m iyada oo aan la kulmin halis dab.

Dhibaatooyinka imtixaanka iska caabbinta shucaaca PCB Sababtoo ah qalabka kaabayaasha ah ee loo adeegsado hawlgalka EUT wuxuu bixiyaa calaamado dhiirrigelin ah si loola socdo waxqabadkiisa, waa inuu laftiisu PCB u adkaysan karaa goobtan xasaasiga ah, taas oo ah dhib ku ah socodsiinta tijaabada dareenka shucaaca. Tani inta badan waxay keentaa dhibaatooyin, gaar ahaan marka qalabka kaabayaashu uu yahay mid adag oo u baahan fiilooyin iyo is -dhexgalyo badan EUT -da oo dalooshay qolka imtixaanka gaashaaman. Dhammaan fiilooyinka dhex maraya qolka imtixaanka waa in la gaashaanto iyo/ama la sifeeyo si goobta imtixaanka looga gaashaanto si looga fogaado in la yareeyo waxqabadka gaashaan ee qolka imtixaanka. Ku qanacsanaanta waxqabadka gaashaan ee qolka imtixaanka waxay keeni doontaa in si aan ula kac ahayn uga daato goobta imtixaanka jawi ku wareegsan, taas oo sababi karta faragelin lagu sameeyo dadka isticmaala muuqaalka. Mar walba suuragal ma aha in loo isticmaalo miirayaasha RF xogta ama khadadka signalada, sida marka ay jiraan xog badan ama marka la adeegsado isku xirka xogta xawaaraha sare leh.