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. Into okanye umntu unokuqokelela intlawulo yombane ngaphakathi kwevolthi ephezulu kune-15kv. Amava abonisa ukuba uninzi lokusilela okungachazwanga kunye nomonakalo kusenokwenzeka ukuba kubangelwa yi-ESD. Ngokukhupha kwi-simulator ye-ESD ukuya kumphezulu kunye nase-EUT, isixhobo sovavanyo (EUT) sithatha umsebenzi we-ESD. Inqanaba lobunzima bokukhutshwa lichazwe ngokucacileyo kwimigangatho yemveliso kunye nezicwangciso zovavanyo lwe-EMC ezilungiselelwe ngumenzi. EUT checks for functional failures or interference in all of its operational modes. Imilinganiselo yokupasa / yokusilela kufuneka ichazwe kwisicwangciso sovavanyo lwe-EMC kwaye ichongwe ngumenzi wemveliso.

PCB transient conductivity resistance

Eyona njongo iphambili yolu vavanyo kukuqinisekisa ukunganyangeki kwe-EUT kukuhamba okwethutyana kunye nexesha elifutshane lokothuka kunye nexesha elinyukayo elikhawulezayo elinokuthi liveliswe yimithwalo enomdla okanye abanxibelelanisi. Ixesha lokunyuka okukhawulezileyo kunye nokuphindaphinda kwendalo yovavanyo lomphumo kubangela ezi spikes zingene ngokulula kwiisekethe ze-EUT kwaye zinokuphazamisa ukusebenza kwe-EUT. Amaxeshana asebenza ngokuthe ngqo kunikezelo lwamandla kunye nokuvunyelwa komgca wophawu. Kwezinye iimvavanyo ze-PCB zokuzikhusela, i-EUT kufuneka ibekwe esweni ngokuphumelela / ukusilela kusetyenziswa uqwalaselo lokusebenza ngokubanzi.

Resistance of PCB to electromagnetic radiation

Eyona njongo iphambili yolu vavanyo kukuqinisekisa amandla emveliso ye-PCB ngokuchasene nokuphazamiseka ngokuchasene nonomathotholo, ii-transceivers, iifowuni ze-GSM / AMPS, kunye neendlela ezahlukeneyo zombane oveliswa yimithombo ye-electromagnetic. Ukuba le nkqubo ayikhuselwanga, imitha ye-electromagnetic inokudityaniswa kunye nentambo yojongano kwaye ungene kwisekethe ngendlela yokuqhuba; Okanye inokudityaniswa ngokuthe ngqo kwi-wiring yesekethe eprintiweyo. 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. Xa usondla i-EUT kwicandelo le-radiation, i-EUT kufuneka isetwe ekusebenzeni kwesiqhelo kunye nemowudi ebuthathaka.

Ukusebenza kwesiqhelo kufuneka kusekwe kwigumbi lovavanyo xa i-EUT ivezwa kumhlaba wokuphazamiseka ohleliweyo onamaqondo agqithisa ngaphezulu kwe-80MHz ukuya ku-1GHz. Some PCB anti-interference standards start at 27MHz. Inqanaba lobunzima lo mgangatho ufuna amanqanaba okumelana ne-PCB ye-1V / m, 3V / m, okanye i-10V / m. Nangona kunjalo, ukucaciswa kwesixhobo kunokuba neemfuno ezizezinye zeengxaki “zokuphazamiseka (ukuphazamiseka)”. The appropriate PCB radiation resistance level of the product is of interest to the manufacturer.

Iimfuno zomhlaba ezimanyanisiweyo Umgangatho omtsha wokuphazamiseka kwe-PCB ye-EN50082-1: 1997 ibhekisa kwi-IEC / EN61000-4-3. IEC / EN61000-4-3 ifuna imeko yobumbano yovavanyo esekwe kwiisampulu zovavanyo. 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. Oku koyisa iimpazamo zovavanyo olukhawulezileyo nolungaphindaphindeki lovavanyo olubangelwa kukuqaqamba kunye neethambeka kumabala emveli angahambelaniyo. (Igumbi elinesiqingatha se-anechoic nayo yindawo efanelekileyo yokulinganisa ukukhutshwa kwemitha kwindawo engafanelekanga yangaphakathi efuna ukuchaneka).

Ukwakhiwa kwamagumbi e-semi-anechoic absorbers ze-RF kuya kulungiswa eludongeni nakwisilingi yamagumbi anezinto ezingaqhelekanga. Oomatshini kunye neenkcukacha zoyilo lweRF kufuneka zilungiselele iithayile ezinzima zeferrite ezingaphakathi kophahla lwegumbi. Izitena zeFerrite zihlala kwizixhobo zedielectri kwaye ziqhotyoshelwe phezulu kwigumbi. Kwigumbi elingacwangciswanga, ukubonakaliswa kobuso bentsimbi kuya kubangela isandi kunye namaza amileyo, enza iincopho kunye nomkhombe kumandla esithuba sovavanyo. I-gradient yentsimi kwigumbi elingacwangciswanga linokuba ngama-20 ukuya kuma-40dB, kwaye oku kuya kubangela ukuba isampulu yovavanyo ibonakale isilele ngequbuliso kwicandelo eliphantsi kakhulu. Isandi segumbi sikhokelela kuphindaphindo kovavanyo oluphantsi kakhulu kunye nenqanaba eliphezulu “lokugqitha”. (Oku kunokukhokelela kuyilo olungaphezulu kwemveliso.) I-PCB entsha yokuchasana nokuphazamiseka i-IEC1000-4-3, efuna iimfuno ezifanayo zentsimi, ilungise ezi ntsilelo zinzulu.

Isixhobo esinezixhobo kunye nesoftware efunekayo ukuvelisa indawo yovavanyo ifuna isandisi-lizwi esikhulu samandla ombane ukuqhuba i-Broadband ehambisa i-eriyali kuluhlu lwamaxesha angaphezulu kwe-26MHz ukuya kwi-2GHz, eyayiziimitha ezi-3 kude nesixhobo esivavanywayo. 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. Iikhonkco zesoftware zivumela ukungqamanisa kokubeka iliso kunye nokukhuthaza ukusebenza kwe-EUT. Iimpawu ezisebenzisanayo ziyafuneka kuvavanyo lokwenyani ukwenza utshintsho lwexesha lokwenyani kwisoftware yokuvavanya i-EMC kunye neeparamitha ze-EUT. Inqaku lokufikelela komsebenzisi livumela yonke idatha ukuba irekhodwe ngokukhawuleza kuvavanyo olusebenzayo kunye nokwahlulahlula intsebenzo ye-EUT EMC.

Izifunxa zePyramidal zesintu i-pyramidal (conical) absorbers ziyasebenza, nangona kunjalo ubukhulu bayo buphiramidi benza ukuba kungabikho mfuneko yokuvavanya iZithuba ezincinci ezinokusetyenziswa kwigumbi. Kwisilinganiselo esisezantsi se-80MHz, ubude be-pyramid absorber kufuneka buncitshiswe buye kwi-100cm, kwaye ukuze usebenze kumaza asezantsi e-26MHz, ubude be-pyramid absorber bube ngaphezulu kwe-2m. Izifunxi zepyramidi nazo zinengxaki. Zibuthathaka, zonakala ngokulula ngokungqubana, kwaye zinokutsha. Kwakhona akunakwenzeka ukuba usebenzise ezi zithinteli kumgangatho wegumbi. Ngenxa yokufudumeza ipiramidi yokufunxa, amandla ebaleni angaphezulu kwe-200V / m kwithuba lexesha elithile aya kuba ngumngcipheko omkhulu womlilo.

Isixhobo sokucoca ithayile

Iithayile ze-Ferrite zisebenza ngokufanelekileyo, nangona kunjalo zongeza ubunzima eluphahleni, kwiindonga nakwiminyango yegumbi, ke ulwakhiwo lwegumbi lubaluleke kakhulu. Zisebenza kakuhle kwii-frequencies eziphantsi, kodwa zingasebenzi kakuhle kwii-frequencies ezingaphezu kwe-1GHz. Iithayile zeFerrite zixinene kakhulu (100mm × 100mm × 6mm ubukhulu) kwaye zinokumelana nokuqina kwentsimi ngaphezulu kwe-1000V / m ngaphandle komngcipheko womlilo.

Ubunzima kuvavanyo lokusasazeka ngemitha lwe-PCB Ngenxa yokuba izixhobo ezincedisayo ezisetyenziselwa ukusebenzisa i-EUT zibonelela ngemiqondiso yokukhuthaza ukubeka esweni ukusebenza kwayo, kufuneka yona uqobo ibe yi-PCB enganyangekiyo kule ntsimi inobuntununtunu, nobunzima bokuvela kuvavanyo lwemitha. Oku kuhlala kukhokelela kubunzima, ngakumbi xa izixhobo ezincedisayo zintsokothile kwaye zifuna uninzi lweentambo kunye nonxibelelwano kwi-EUT ezenziweyo kwigumbi lovavanyo olukhuselweyo. Zonke iintambo ezibaleka kwigumbi lokuvavanya kufuneka zikhuselwe kunye / okanye zihluzwe ukuze indawo yovavanyo ikhuselwe kubo ukunqanda ukunciphisa ukusebenza kokukhusela kwigumbi lokuvavanya. Ukungenelela ekusebenzeni kokukhusela kwigumbi lokuvavanya kuya kubangela ukuvuza okungacacanga kwendawo yovavanyo kwindawo engqongileyo, enokubangela ukuphazamiseka kubasebenzisi bebala. Akusoloko kunokwenzeka ukuba usebenzise iifilitha zeRF zedatha okanye imigca yesiginali, njengaxa kukho idatha eninzi okanye xa kusetyenziswa ikhonkco ledatha ephezulu.