Umbhali: Smartweigh–I-Multihead Weighter
I-digital display multihead weigher eklanywe kuleli phepha iyidivayisi ebonisa ukukala esekelwe kunzwa yamandla okumelana nokuklanywa kwe-chip microcomputer eyodwa njengokhiye wokulawula. Ibanga lokutholwa lingu-0-10kg, futhi ukunemba kokulinganisa kungu-±I-2g, isikrini sokubonisa ikristalu ewuketshezi sibonisa imininingwane yedatha yokulinganisa enembile, ngaphezu kwalokho, imininingwane yedatha yokulinganisa enembile ingathunyelwa kukhompyutha ye-elekthronikhi ukuze ibonise ulwazi ngokuya ngembobo ye-serial. Isofthiwe yesistimu inezici zokunemba okuphezulu, izici ezizinzile nokusebenza okulula. Umdwebo wefreyimu yesikimu se-multihead weigher uboniswa kuMfanekiso 1 ngezansi: 1. Isimiso sesekethe yokucushwa kwehadiwe 1.1. I-resistor yenzwa yokukala Inzwa yokukala amandla e-strain yakhiwe izingxenye eziningi ezibalulekile ezifana nama-resistance gauge, ama-polyurethane elastomers kanye namasekhethi okunikezwa kwamandla okuhlola. akha.
I-polyurethane elastomer idala ukuwohloka okunwebekayo ngaphansi kwamandla angaphandle, ukuze igeji ye-resistance gauge enamathiselwe ebusweni bayo nayo ibangele ukuwohloka. Ngemuva kokuthi i-resistance gauge ikhubazekile, inani layo lokumelana lizoshintsha (linwebe noma linciphe), bese ngesilinganiso esinembile kakhulu Isifunda samandla siguqulela lesi siginali sibe isignali ye-elekthronikhi (i-voltage esebenzayo noma yamanje), bese iqedela yonke inqubo yokuguqula. amandla angaphandle abe isignali kagesi. Hlola isifunda sokuphakelwa kwamandla njengoba kukhonjisiwe kuMfanekiso 2, futhi ushintshe ukumelana kwegeji yohlobo lokumelana kube okokukhipha kwamandla kagesi. Ngenxa yokuthi ibhuloho le-Wheatstone linezinzuzo eziningi, njengokukwazi ukucindezela ukulimala kokushintsha kwezinga lokushisa, ukucindezela ithonya lamandla aseceleni, kanye nokubhekana kalula nenkinga yesinxephezelo senzwa yokukala, ibhuloho le-Wheatstone lizuze inzuzo enkulu inzwa yokukala. ukusetshenziswa kwendawo yonke.
Inzwa yokukala imvamisa inenani lemigqa emine yokuphumayo, futhi ukumelana nokuphumayo kuvamise ukuba ngu-350Ω, 480Ω, 700Ω, 1000Ω. Isiphetho sokufakwayo ngokuvamile sifeza isinxephezelo esithile sezinga lokushisa nokuzwela, futhi isivimbeli sesiphetho sokufaka sizoba phezulu kunokuphela kokuphumayo. 20 ~ 100Ω, ngakho Sebenzisa i-multimeter yedijithali ukukala inani lokumelana ukuze uhlonze amatheminali okukhiphayo. 1.2. Isignali yedatha yokuphumayo yenzwa yesisindo sohlobo lwesekethe ekhulisayo ayiqinile (mV noma i-μV heavyweight), futhi kuvame ukuba nomsindo omkhulu nayo. Ngesiginali yedatha enjalo, isinyathelo sokuqala kusixazululo sesekethe yokuphakelwa kwamandla ngokuvamile ukukhetha isikhulisi sensimbi ukuze siqale sikhulise isignali encane yedatha.
Isekhethi yokunikezwa kwamandla we-instrumentation amplifier inamandla okunqaba imodi evamile kunesekhethi ye-amplifier yesignali elula. Inhloso ebaluleke kakhulu yokwandisa akulona inani lenzuzo, kodwa ukuthuthukisa ukuzinza kwemvamisa yesekethe yokuphakelwa kwamandla. Kulolu hlelo lokuklama, i-amplifier ye-instrumentation yamukela isakhiwo se-OP07 ama-amplifiers amathathu asebenzayo.
3 njengoba kukhonjisiwe ku-Fig. Uma u-R1=R2, R3=R4, Rf=R5, inani lokuzuza lesekethe yokuphakelwa kwamandla ngu: G=(1+2R1/RG1) (Rf/R3). Kungabonakala esibalweni sefomula ukuthi ukulungiswa kwevelu yenzuzo yesekethe yokuphakela amandla kungaqedwa ngokushintsha inani lokumelana le-RG1.
1. 3. Isekhethi ye-A/D yokuguqulelwa kwamandla Isiguquli se-A/D sikhetha i-icHX711 ehlanganisiwe yesikali esikhethekile esingu-24-bit, okuyi-ic ehlanganisiwe engu-24-bit A/D eklanyelwe ngokukhethekile izikali zikagesi ezinembe kakhulu. Uma kuqhathaniswa namanye ama-IC ahlanganisiwe ohlobo olufanayo, i-IC ehlanganisiwe ihlanganisa amasekhethi aseduze adingekayo kwamanye ama-IC ahlanganisiwe ohlobo olufanayo, okuhlanganisa ukunikezwa kwamandla okulawulwayo okulungiswayo, i-oscillator yewashi le-on-chip, nokunye okunjalo. Faka iswishi ukuze ukhethe isiteshi sokuphepha A noma isiteshi sokuphepha B ngokuthanda kwakho, futhi iamplifier yesilawuli sohlelo olunomsindo omncane sixhunywe phakathi kwakho kokubili.
Inani lenzuzo lesilawuli sohlelo lwesiteshi sokuphepha A ngu-128 noma 64, futhi inani elihambisanayo lomkhawulo ogcwele wekhredithi womehluko wesignali yesignali yesignali yokuphakama kwesiginali ngokulandelana ngokulandelana.±20m.
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