Ngexesha welding inkqubo kwiwelder ultrasonic, igalelo lesignali yombane kwinkqubo ye-acoustic itshintsha ngokukhawuleza, kunye noluhlu lwe-frequency variation lubanzi.Ukuze kuphuculwe isantya sokulinganisa kunye nokuchaneka, okokuqala, amanyathelo athatyathiweyo ukukhetha i-chip ngesantya sokuphendula ngokukhawuleza, kunye nexesha eliqhubekayo lecandelo kunye nekhonkco lokucoca i-peripheral circuit ye-chip ilawulwa ukuba ibe ngaphantsi kwe-0.2 ms. , ukwenzela ukuba kuqinisekiswe ukuba ixesha lokuphendula lilonke lenkqubo lingaphantsi kwe-2 ms, kwaye lihlangabezane neemfuno zokubona umqondiso wombane oguqukayo ngokukhawuleza.Ukuze kuqinisekiswe imfuno ye-wide frequency band amplitude kunye neempawu ze-frequency yenkqubo, i-RCK yohlobo lwe-resistor echanekileyo ngokuchanekileyo kunye nokuzinza okuphezulu kukhethiweyo, ene-inductance encinci ye-parasitic kunye ne-capacitance.Amacandelo e-Op-amp aya kukhethwa ngokukhulisa i-loop evulekileyo engaphezulu kwe-10 kunye nokukhulisa i-loop evaliweyo engaphantsi kwe-10. Ngale ndlela, i-flat amplitude-frequency curve inokufumaneka kwi-0 ~ 20 kHz ± 3 kHz.Oku kulandelayo yinkcazo emfutshane yemodyuli nganye esebenzayo.
1.1 Umlinganiselo weeVrm zombane weRMS
Izixhobo zokuvavanya eziphuhliswe kweli phepha zinokulinganisa isibonakaliso sombane we-sinusoidal ngokugqwetha kunye ne-RMS ye-0 ~ 1 000 V kunye nokuphindaphinda kwe-20 kHz ± 3 kHz.I-voltage yegalelo ikhutshwe ngumqondiso, ixabiso le-RMS liguqulelwa kwi-AC / DC, kwaye emva koko lilungelelaniswe ngokulinganayo kwiindlela ezimbini zokuphuma.Itshaneli enye inikezelwa kwi-3-bit ye-semi-digital meter intloko kwiphaneli yangaphambili yomvavanyi, ebonisa ngokuthe ngqo ixabiso le-RMS ye-0-1 000 V yombane.Enye ikhupha i-0 ~ 10 V isignali yombane we-analog ngephaneli yangasemva yomvavanyi ukuze kufunyanwe idatha kunye nohlalutyo yikhompyuter.
Isibonakaliso sombane sinokukhutshwa nge-voltage transformer, i-sensor element yeHolo okanye isixhobo sokuguqula i-photoelectric.Ezi ndlela
Nangona ukwahlula kulungile, kuya kuvelisa amanqanaba ahlukeneyo okugqwetheka kwe-waveform kunye nokutshintsha kwesigaba esongezelelweyo kwi-20 kHz isignali yombane, eyenza kube nzima ukuqinisekisa ukuchaneka komlinganiselo wamandla kunye ne-Angle yesigaba sokulinganisa.Eli nqaku LISEBENZISA iamplifier ehambelanayo nokulungiswa komqondiso wombane, ukuxhathisa kwegalelo leamplifier usebenzisa i-5. 1 M Ψ, lo mba unokwenza igalelo lesignali lithotywe, ukhuseleko oluphezulu loxinzelelo lweesekethe ezilandelayo, kwaye ngenxa yegalelo legalelo leamplifier ligqithise kakhulu Umthombo wesignali ukuchasana kwejenereyitha ye-ultrasonic, i-ultrasonic generator imo yokusebenza ayinayo impembelelo.
I-AD637 isetyenziselwa umlinganiselo wombane we-RMS.Yi-AC-DC RMS converter kunye nokuchaneka okuphezulu kwe-upconversion kunye nebhendi yefrikhwensi ebanzi, kwaye ukuguqulwa kuzimele kwi-waveform.Yinyani yokuguqula i-RMS.Impazamo enkulu malunga ne-1%.Xa i-waveform factor ingu-1 ~ 2, akukho mpazamo yongezelelweyo yenziwayo.
1.2 Umlinganiselo wexabiso langoku elisebenzayo
Isekethe yangoku yokufumanisa i-RMS ephuhliswe kweli phepha inokubona umqondiso wangoku kunye nokuphazamiseka kwe-sinusoidal ye-0 ~ 2 A, 20 kHz ± 3 kHz.Ngokwamkela ukuchasana kwesampulu eqhelekileyo edityaniswe kuthotho kwiluphu yomthwalo wejeneretha ye-ultrasonic kwiFIG.I-1, yangoku iguqulwa kuqala ibe ngumqondiso we-voltage ngokulinganayo kuyo.Kuba ukuchasana kwesampulu sisixhobo esisulungekileyo sokumelana, akuyi kuzisa ukugqwetheka kwe-waveform yangoku okanye ukutshintshwa kwesigaba esongezelelweyo, ukuze kuqinisekiswe ukuchaneka komlinganiselo.Umqondiso we-voltage ulungelelaniso lwangoku uguqulwa ube ngumqondiso wombane we-analog nge-RMS AC-DC converter AD637, ephuma kwintloko yemitha yedijithali kunye nekhompyutheni ngeendlela ezimbini.Umgaqo wokuguqula uyafana nowokuguqulwa kombane we-RMS.
1.3 Umlinganiselo wamandla asebenzayo
Isiginali yokulinganisa amandla asebenzayo ivela kwi-voltage encitshisiweyo kunye ne-I/V eguqulweyo yesiginali kwimodyuli yokulinganisa i-RMS yombane kunye neyangoku.Undoqo wemodyuli yokulinganisa amandla yi-AD534 yokuphindaphinda i-analog kunye nesekethe yokucoca.Emva kokuba i-voltage ye-instantaneous iphindwe ngokuphindaphinda kwangoku, icandelo le-high-frequency component lihluzwa ukuze lifumane amandla okwenene asebenzayo.
1. 4 Ukulinganisa umehluko wesigaba phakathi kwangoku kunye nombane
Umahluko wesigaba phakathi kwe-voltage ye-input kunye ne-current ye-transducer ye-ultrasonic ilinganiswa ngokubumba i-voltage yegalelo kunye nezibonakaliso zangoku zibe ngamaza ayisikwele ngokusebenzisa i-zero-crossing comparator, kwaye emva koko udibanise umahluko wesigaba ngokusebenzisa i-XOR logic processing.Ngenxa yokuba akukho mahluko wesigaba kuphela phakathi kombane kunye nangoku, kodwa kunye nomahluko phakathi kwe-lead kunye ne-lag, i-Ming Yang ikwayile isiphaluka sexesha ukuchonga ukukhokela kunye nobudlelwane be-lag.Ukuba unesidingo nceda uqhagamshelane nathi.
1.5 Umlinganiselo wokuphindaphinda
Imodyuli yokulinganisa rhoqo ithatha i-chip microcomputer 8051, isebenzisa i-crystal frequency frequency, i-crystal pulse signal count kwithuba elithile lomqondiso, inokuphunyezwa ngaphakathi kwe-1 ms, i-frequency yi-20 kHz, impazamo ayikho ngaphezu kwe-2 Hz.Iziphumo zomlinganiselo we-frequency ziphuma ngamanani okubini ayi-16-bit, igalelo kwikhadi le-I/O lekhompyuter, kwaye liguqulelwe ekubeni lidesimali lawona maxabiso aphindaphindiweyo ngokucwangciswa kwesoftware.
I-ultrasonic i-welding yeplastiki igqityiwe phantsi kwangoko kunye noxinzelelo, kwaye inkqubo ye-welding ibonisa iimpawu zempembelelo ekhawulezayo, enzima, enzima kunye ne-multi-parameter.Ngexesha nasemva kwe-welding, uxinzelelo olukhulu kunye ne-deformation (welding residual deformation, i-welding shrinkage, i-welding warping) iya kuveliswa, kunye noxinzelelo oluguquguqukayo kunye noxinzelelo olushiyekileyo lwe-welding oluveliswa kwinkqubo ye-welding, kodwa luchaphazela ukuguqulwa kwe-workpiece kunye neziphene ze-welding.
Ikwachaphazela ukuwelda kwesakhiwo se-workpiece kunye nokomelela kwe-brittle fracture, amandla okudinwa, amandla esivuno, iimpawu zokungcangcazela njalo njalo.Ichaphazela ngakumbi i-welding workpiece machining ukuchaneka kunye nokuzinza kwe-dimensional.Ingxaki ye-welding yoxinzelelo lwe-thermal kunye ne-deformation inzima kakhulu, ngaphandle kokubona kwangaphambili, ayikwazi ukuqikelela ngokucacileyo kwaye ihlalutye impembelelo ye-welding kwiipropati ze-mechanical ze-welder yonke, kwaye ivavanye ngokufanelekileyo umgangatho we-welding.Ngexesha elifanayo, idatha eninzi ebalulekileyo, eyimpembelelo, ayinakulinganiswa ngokuthe ngqo ngeendlela eziqhelekileyo.
Siyi-R & D yobungcali, imveliso, kunye neentengiso zeumatshini welding we-ultrasonic, umatshini wokuwelda amaza aphezulu, umatshini wentsimbi welding, Ijenereyitha ye-ultrasonicumzi-mveliso.Siyavuya ukwabelana ngenkxaso yethu yobuchwepheshe be-ultrasound kunye namava e-ultrasound case.Ukuba uneprojekthi yokubonisana, nceda usixelele izinto kunye nobukhulu beemveliso zakho.Siza kukubonelela ngenkqubo ye-welding ye-ultrasonic yamahhala.
Ixesha lokuposa: Oct-20-2022