Onye edemede: Smartweigh-Multihead Ibu arọ
Igwe ihe nleba anya dijitalụ nke emebere n'akwụkwọ a bụ ngwaọrụ ngosipụta njikwa nha dabere na ihe mmetụta nguzogide nrụgide na imewe nke otu mgbawa microcomputer dị ka isi ihe na-achịkwa. Oke nchọpụta bụ 0-10kg, na nha nha bụ nke ziri ezi±2g, ihuenyo ngosi kristal mmiri mmiri na-egosiputa ozi nke data nha ziri ezi, na mgbakwunye, enwere ike iziga ozi nke data nha ziri ezi na kọmputa eletrọnịkị maka ozi ngosi dịka ọdụ ụgbọ mmiri. Akụrụngwa sistemụ nwere njirimara nke oke nkenke, njirimara kwụsiri ike na ọrụ dị mfe. Egosiri eserese eserese nke atụmatụ imewe ihe nrụnye ọtụtụ isi na eserese 1 n'okpuru: 1. Ụkpụrụ nhazi nhazi ngwaike 1.1. Ihe mmetụta ihe na-atụ ihe ihe mmetụta na-atụ ihe ihe mejupụtara ya nwere ọtụtụ akụkụ dị mkpa dị ka nlele nguzogide, polyurethane elastomer na sekit ọkọnọ ike nyocha. mejuputara.
Polyurethane elastomer na-eme ka nrụrụ na-agbanwe agbanwe n'okpuru ike mpụga, nke mere na ihe nrịbama nguzogide na-ejikọta ya na elu ya na-akpatakwa nrụrụ. Mgbe ihe nrịbama nguzogide ahụ mebiri emebi, uru nguzogide ya ga-agbanwe (gbasaa ma ọ bụ ibelata), wee site na nha ziri ezi, sekit ike na-agbanwe resistor a ka ọ bụrụ akara eletrọnịkị (voltaji na-arụ ọrụ ma ọ bụ ugbu a), wee mechaa usoro niile nke ịtụgharị. ike mpụga n'ime akara eletrọnịkị. Lelee sekit ọkọnọ ike dị ka egosiri na eserese 2, ma gbanwee nguzogide nke nguzogide nguzogide n'ime mmepụta voltaji na-arụ ọrụ. N'ihi na akwa mmiri Wheatstone nwere ọtụtụ uru, dị ka ikike igbochi mmebi nke mgbanwe okpomọkụ, igbochi mmetụta nke ike akụkụ, na iji dozie nsogbu nkwụghachi ụgwọ nke ihe mmetụta na-eri ihe, akwa Wheatstone enwetawo nnukwu uru na ya. ihe mmetụta na-atụ. eluigwe na ala ojiji.
Ihe mmetụta na-atụ ihe n'ozuzu nwere ngụkọta nke ahịrị mmepụta anọ, na nguzogide mmepụta bụ n'ozuzu 350Ω, 480Ω, 700Ω, 1000Ω. Nkwụsị ntinye n'ozuzu na-eme ụfọdụ nkwụghachi ụgwọ maka okpomọkụ na uche, na njedebe ntinye aka ga-adị elu karịa njedebe mmepụta. 20 ~ 100Ω, ya mere, jiri multimeter dijitalụ tụọ uru nguzogide iji chọpụta njedebe mmepụta. 1.2. Ihe mgbaàmà data mmepụta nke ụdị ihe mmetụta sekit na-eme ka ọ dị ike adịghị ike (mV ma ọ bụ ọbụna μV heavyweight), yana ọtụtụ mkpọtụ na-enwekwa ya. Maka mgbama data dị otú ahụ, nzọụkwụ mbụ na ngwọta sekit ọkụ ọkụ bụ n'ozuzu ịhọrọ ihe nrịbama ngwá ọrụ iji buru ụzọ gbasaa mgbama data dị ntakịrị.
The instrumentation ampilifaya ike ọkọnọ sekit nwere ike nkịtị mode jụrụ ike dị mfe dị iche mgbaama ampilifaya circuit. Ebumnuche kachasị mkpa nke ịba ụba abụghị uru uru, kama ọ bụ naanị iji melite nkwụsi ike ugboro ugboro nke sekit ọkọnọ ike. N'ime atụmatụ imewe a, akụrụngwa akụrụngwa na-anabata usoro nke OP07 amplifiers arụmọrụ atọ.
3 dị ka egosiri na Fig. Mgbe R1 = R2, R3 = R4, Rf = R5, uru uru nke sekit ọkọnọ ike bụ: G = (1 + 2R1 / RG1) (Rf / R3). Enwere ike ịhụ site na nhazi usoro na nhazi nke uru uru nke sekit ọkụ eletrik nwere ike mechaa site n'ịgbanwe uru nkwụsị nke RG1.
1. 3. A / D ntụgharị ike ọkọnọ sekit A / D ihe ntụgharị na-ahọrọ ọnụ ọgụgụ eletrọnịkị-kpọmkwem Integrated icHX711, nke bụ 24-bit A / D Ntụgharị integrated ic pụrụ iche e mere maka elu-nkenke eletrọnịkị akpịrịkpa. E jiri ya tụnyere IC ndị ọzọ agbakwunyere nke otu ụdị, IC jikọtara ọnụ na-ejikọta sekit dị n'akụkụ dị mkpa maka IC ndị ọzọ jikọtara ọnụ nke otu ụdị, gụnyere ọkụ ọkụ na-edozi edozi, oscillator elekere na mgbawa, na ihe ndị yiri ya. Tinye ngbanwe ka ịhọrọ ọwa nchekwa A ma ọ bụ ọwa nchekwa B ma ọ bụrụ na ịchọrọ, yana njikwa mmemme mkpọtụ dị n'ime na-ejikọta n'etiti abụọ ahụ.
Uru uru nke onye na-ahụ maka mmemme nke ọwa nchekwa A bụ 128 ma ọ bụ 64, yana kredit zuru oke na-amachi mgbama mgbama dị iche iche ntinye data njupụta uru bụ otu n'otu.±20m.
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