Smart Weigh ya himmatu wajen taimaka wa abokan ciniki su kara yawan aiki a rahusa.
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Smart Weigh ya himmatu wajen taimaka wa abokan ciniki su kara yawan aiki a rahusa.
Marubuci: Smartweigh-Multihead Weighter
Ma'aunin nuni na dijital multihead wanda aka ƙera a cikin wannan takarda shine na'urar nuni mai sarrafa nauyi bisa tushen ƙarfin ƙarfin juriya da ƙirar ƙirar microcomputer guda ɗaya a matsayin maɓallin sarrafawa. Matsakaicin ganowa shine 0-10kg, kuma daidaiton auna shine±2g, allon nunin kristal na ruwa yana nuna bayanan madaidaicin bayanan ma'auni, ƙari kuma, ana iya aika bayanan ma'aunin daidaitattun bayanai zuwa kwamfutar lantarki don nunin bayanai bisa ga tashar tashar jiragen ruwa. Software na tsarin yana da halaye na babban madaidaici, halayen barga da aiki mai sauƙi. An nuna zanen firam ɗin tsarin ƙira mai ma'aunin kai da yawa a cikin hoto na 1 da ke ƙasa: 1. Ƙa'idar da'irar ƙirar hardware 1.1. Na'urar auna firikwensin firikwensin ma'aunin ƙarfi mai ƙarfi ya ƙunshi sassa da yawa kamar ma'aunin juriya, elastomer na polyurethane da da'irar samar da wutar lantarki. kunshi.
Elastomer na polyurethane yana haifar da nakasawa a ƙarƙashin ƙarfin waje, don haka ma'aunin juriya da ke haɗe da samansa shima yana haifar da nakasawa. Bayan ma'aunin juriya ya lalace, ƙimar juriyarsa za ta canza ( faɗaɗa ko raguwa), sannan ta hanyar ingantacciyar ma'auni Na'urar wutar lantarki tana jujjuya wannan resistor zuwa siginar lantarki (voltage mai aiki ko na yanzu), sannan ya kammala gabaɗayan tsarin juyawa. Ƙarfin waje zuwa siginar lantarki. Bincika da'irar samar da wutar lantarki kamar yadda aka nuna a hoto na 2, kuma canza juriyar ma'aunin juriya zuwa fitowar wutar lantarki mai aiki. Saboda gadar Wheatstone yana da fa'idodi da yawa, kamar ikon danne cutar da canjin zafin jiki, don murkushe tasirin ƙarfi na gefe, da kuma magance matsalar diyya ta firikwensin awo cikin sauƙi, gadar Wheatstone ta sami babban fa'ida. firikwensin awo. amfani da duniya.
Na'urar firikwensin auna gabaɗaya yana da jimillar layukan fitarwa huɗu, kuma juriyar fitarwa gabaɗaya ita ce 350Ω, 480Ω, 700Ω, 1000Ω. Ƙarshen shigarwa gabaɗaya yana aiwatar da wasu ramuwa don zafin jiki da hankali, kuma ƙarshen shigarwar zai kasance sama da ƙarshen fitarwa. 20 ~ 100Ω, don haka Yi amfani da multimeter na dijital don auna ƙimar juriya don gano abubuwan fitarwa. 1.2. Siginar bayanan fitarwa na firikwensin ma'aunin nau'in haɓaka nau'in kewayawa ba shi da ƙarfi (mV ko ma nauyi mai nauyi μV), kuma galibi ana yawan hayaniya tare da shi. Don irin wannan siginar bayanai, mataki na farko a cikin hanyoyin samar da wutar lantarki gabaɗaya shine don zaɓar amplifier na kayan aiki don fara ƙara ƙaramar siginar bayanai.
Wurin samar da wutar lantarki na kayan aiki yana da ƙarfin ƙin yarda da yanayin gama gari fiye da da'irar ƙara girman sigina mai sauƙi. Mahimmin mahimmancin haɓakawa ba shine ƙimar riba ba, amma kawai don inganta daidaiton mitar wutar lantarki. A cikin wannan tsarin ƙira, amplifier na kayan aiki yana ɗaukar tsarin OP07 amplifiers masu aiki uku.
3 kamar yadda aka nuna a cikin siffa Lokacin da R1 = R2, R3 = R4, Rf = R5, ƙimar riba na da'irar wutar lantarki shine: G=(1+2R1/RG1) (Rf/R3). Ana iya gani daga lissafin ƙididdiga cewa za'a iya kammala daidaita ƙimar riba na da'irar wutar lantarki ta hanyar canza ƙimar juriya na RG1.
1. 3. A / D mai canza wutar lantarki mai juyawa A / D yana zaɓar ƙayyadaddun ƙayyadaddun sikelin lantarki wanda aka haɗa iHX711, wanda shine 24-bit A / D mai canzawa wanda aka haɗa ic musamman da aka tsara don madaidaicin ma'auni na lantarki. Idan aka kwatanta da sauran haɗaɗɗen ICs na nau'in iri ɗaya, haɗaɗɗen IC ɗin yana haɗa nau'ikan da'irar da ake buƙata don sauran haɗaɗɗun ICs iri ɗaya, gami da ingantaccen tsarin samar da wutar lantarki, oscillator na agogon guntu, da makamantansu. Shigar da maɓalli don zaɓar tashar aminci A ko tashar aminci B a yadda ake so, kuma ana haɗe amplifier na ƙaramar ƙaramar shirin na ciki tsakanin su biyun.
Ƙimar riba na mai sarrafa shirin tashar aminci A shine 128 ko 64, kuma daidaitaccen iyakar ƙimar ƙimar siginar siginar siginar siginar daidai yake bi da bi.±20m.
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