DUNG CHO HE JHONG CAM KHI GA VA CHAT LONG

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DUNG CHO HE J H O N G CAM KHI GA VA CHAT LONG

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tong bai nay chung tdi xin dupe gidi thieu vi bPm vdi kich thude ehi bang eon tem bUu dien, tieu ton ft ning lupng, tuoi thp tren 10.000 gid, cd k h i nang Uhg dung cho c i he cam bien khf ga va cam bien hda chat Idng, l i p dat dUcic trong e i mang lUdi v i thiet bj cam tay.

Nhu eau nang cao tfnh an toan va hieu q u i cua eac q u i trinh edng nghiep la ddng lUc phit trien cae he thong c i m bien Ung dung trong cdng nghiep va trong d i n dung. Oe tao ra cic g i i trj do ludng chfnh xic v i on djnh, tfn hieu loi v i o cam bien can dupe giOthit deu, die biet khi mdi trUdng chUa tfn hieu loi v i o c i m bien ludn thay doi. Trong bai nay chung tdi mudn md t i mdt he thong vi bom hieu suit cao md ra cd hdi thiet ke tien tien cho ca cam bien khi ga va cam bien hda (chat Idng).

OUng tren quan diem thuong mai, tfnh ning then ehot eua he thong vi bcJm chfnh la chi phf. Chfnh bieu do ehi phf da lam thay doi each thiet ke va Ung dung he thong c i m bien. Gii c i eua vi bom chi dupe phep trong khoing vai USD vl hang chue hoac hang tram USD. Chi phf thap ed the tao ra mang lUdi phin phoi rdng hon khi xet eung mdt Ung dung, lam tang diem ket xuat dU lieu dan tdi t i n g hieu q u i thu thap dU lieu eua he thong c i m bien. Trong khi, chi phi cao hon se l i m han che sd c i m bien dupe sir dung.

Hinh 1. Vi bam m-6 (A) vd cdc thdnh phdn hap thdnh (B)

Chi phf cua berm, mUe tieu thu nang lupng, v i kfch thude se l i nhUng thdng sd xic djnh trong thiet ke eua he thdng. Tham ehi vdi ten gpi "vi bom", d nhUng nPi the tich bom tUong ddi nhd, thi kfch thude eua nhieu loai vi bom han ehe tfnh linh hoat tUdng Ung vdi loai c i m bien can sir dung. Cic he thdng vi bom tren cd sd i p dien, mang, hoac hai cap dUde md ta trong bai niy cd cdng suit bcrm cao v i giii quyet dupe mdt v i i khd khin

nhU: ehi phi, kfch thUde, dp ben trong khi thiet ke giin don, nang lupng tieu thu thap, cd k h i nang ehdng hda chat cao, tinh ning tdt d che dp bom hai cap, thiet ke theo module lam tang tinh linh hoat khi tfch hdp cac he thdng c i m bien.

CO CHE HOAT DdNG

NhUng tfnh nang ky thuat then chdt cua vi bom dupe dUa tren eP ehe bPm mang hai cap, kich hoat nhd viec g i n hai thanh phan i p dien va ket hpp vdi cic van thu ddng, hinh 1.

Trong thiet ke nay, ngUdi ta chl dung PolyPhenylene Sulfone (PPSU)-mdt vat lieu polyme-lim tiep xuc vdi phan than bom.

Xet ve cic Ung dung y te, vat lieu dupe sCr dung can tuin theo cae tieu chuan IS010993 va USP, chuan VI.

Co che bdm cua vi bPm dupe md ta trong hinh 2. Mpt thanh phan gom ap dien (mau xanh luc) gan tren mdt mang ddng thau (miu ti'a) lam cho mang cong xuong phfa dUdi khi dat mdt dien the vao dd, ep ddng (chat Idng hoac khO ra khdi budng bom. Cic van kiem tra dupe bd tri tren buong bdm se quyet djnh hudng cua ddng vat chat. Khi dien i p giim, bien dang cua phan tiT gdm ap dien tUPng Ung se lam mang cong len phfa tren, hut ddng vat chat v i dien day budng bdm. He thdng nay ed the thUe hien vai t r i m chu ky bom moi giiy. Hieu suit bom cd the dupe tdi Uu cho nhUng yeu eau eua Uhg dung cu the thdng qua viec dieu chinh ba thdng sd: bien dp, t i n so, v i kieu sdng cua tfn hieu dieu khien dien. Lfu diem eua cdng nghe bPm dung ap dien la d cho khdng tda nhiet trong qui trinh bom.

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Hinh 2. Bieu d6 cua ca chi bam. Khi Oat diin dp vdo phdn tit dp diin (xanMi luc) trin mdng (mdu tia) cia bctm si thay dSi, cong lin hoac cong xu6ng M hut ddng vdt chdt vdo trong bu6ng bam hade dSy ra ngodi van kiem tra.

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TIT dpng hoa ngay nay / 1 0 , 2 0 1 1

CTNG DUNG TRONG C A M BIEN KHf

Trong Ung dung d i n dung, vi bom tren co sd i p dien dupe sir dung de kiem soit viec trdn khf Nj, Hj, va Oj. SU dung mdt kenh re nhinh, khf dupe lay ra eho tiep xuc vdi Idp vat lieu nhay khi eua c i m bien va dupe phin tich tai day. Vdi c i m bien hda hpc ed dp nhay cao, ngudi ta cd the dua mau vao dUdi dang xung hoac lien tue l i m tang chat lupng eua dU lieu.

Trong q u i trinh kiem tra he thdng cua vi bom, cic die tuyen ve ddng luu dua tren the (lam ddng lue) va tan sd dupe xac dinh nhU trong hinh 3A. Hinh 3B bieu thj mdi quan he giUa tin hieu tUOng ddi eua c i m bien vdi ddng khf, cho thay sU cii thien trong tfn hieu vdi bom khi mang khf tdi c i m bien. Sir dung loai bdm niy eung ddng thdi tao ra mdt ddng vat chat dn dinh trong q u i trinh do. Theo do thj bieu dien, mac du tin hieu thu dupe tU mdt sd loai c i m bien la khic nhau, nhUng nhln chung, ddng vat chat chu ddng tdi c i m bien deu cd nhUng t i c ddng tfch cUe len cUdng dp tin hieu.

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100 140 1G0

VoHaoclVI Flow rate |nit/minj

Hinh 3:06 thf bieu diin tdc ddng cda ddng tich ci/c len hai loai cdm bien hda hgc khdc nhau. Oo thi Amdtd toe do ddng cda vi bam dua tren diin thi ddt vdo vd tdn s6; 3B) quan hi giCta tin hiiu cdm bien vd ddng khi.

Khi cd sU ket hop giOa the tfch khf lay ra va dp nhay c i m bi^n, ngudi ta thudng lay g i i trj 7 mL/phut lam tdc dp khi eho he thdng. Thiet ke bom theo md-dun eho phep cae nha sin xuat phit trien eac bd phan dien tU dpng lUe eho md-dun bom dUa tren yeu eau eua eie Ung dung eu the, tdi Uu hda mUe nang lupng sCr dung.

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Thiet ke dPn giin eua bPm tfch hpp nhieu tfnh ning vao cac thanh phan bom dung khudn mau, ed nghTa l i he thdng vi bom ming hai cap ed the dupe sin xuat vdi chi phf thap. Quy trinh sin xuat 6uac kiem soit, tUddng hda cao v i cd khi ning lap lai Idn, d i m b i o dp tin cay cao. NhUng quy djnh ngat ngheo trong kiem tra chat lupng cho phep he vi bOm cd the dupe sU dung trong mdt sd Ung dung die biet, bao gdm c i trong y te.

Thiet ke theo module cho phep de ding tfch hpp he vi bom vio h^ thdng nhim tao ra ddng vat chat giin doan hoac lien tue mdt cich chfnh xic. Nen t i n g thiet ke eho phep tuy bien he thdng l i m glim chi phi, t i n g k h i nang Ung dung.

Ming hai cap siT dung bd chap hanh dupe tfch hpp trong mdt bom l i thiet ke tien tien dupc sCr dung d i u tien. Thiet bj ed the bom chat Idng vdi dp nhdt len tdi tdi 120 cp v i khf. Khi bPm nude, tdc dp ddng tdi da la 6 mlVphut d tan sd hoat ddng 100 Hz. Tuy vay, chung ta ed the ghep nhieu bom lai lam t i n g tdc

<Jp ddng. Vdi khf, tdc dp mdt bom cd the len tdi 18 mlVphut.

Khi bom chit Idng, cO che m i n g hai cap sinh edng can bing vdi ap suat ngUpc len tdi 8 psi (550 mbar). Vdi cic thiet bj

yeu cau ap suit Idn hon (nghTa la he chat Idng phUe tap hon vdi lUe mao quin Idn hon hoac lien quan tdi chUe ning Ipe trong he thdng), dau ndi tiep hai vi bom mang hai cap, ap suat thu dupe se dat 16 psi. d tan sd 100 Hz, dp chfnh xic l i ±15%.

Trong mdt vai trudng hpp, cd the l i m tang dp chfnh xic, neu can thiet. Them vao dd, nguyen ly sir dung hai bd chap hanh trong bom se d i m bao khi ning tU dien day, eii thien kha nang tU nap cua bom lue khdi ddng. Thiet bj eung cd khi ning dung sai tdt ddi vdi bdng khf v i ed the bdm hon hpn chat khi- Idng.

Vdi kfch thude nhd gpn (30 x 15 x 3.8 mm; xem bing 1), v i die biet ehieu cao khi thap, bom ed the dupe l i p dat trong trong cic chip vi luu. Viee giim bdt khdng gian chiem cho cd the dupe thUe hien nhd ndi trUe tiep van kiem tra eua bom vao eie bd phan bom cua chip vi luu. DUa tren thiet ke cua chip vi lUu, eung cd the tich hpp vi bom nhu mdt linh kien OEM v i o trong bd phan dpc ket qui. Trong nhUng UHg dung nhU can lap dat bom nhu vay, vi du, mdt dem khi giUa ddng luu 6uac bom va bPm nham giim dp g i y nhiem ban he thdng. Oe tao ra Idp dem khi, vi bom tao ra mdt chin khdng, hut khdng khf vao trong bom. Khi lay mau, Idi vao dupe tiep xuc vdi chat Idng sau dd dugc mang tdi cim bien. Neu bd tri cim bien du xa d phfa trudc bom, cim bien se tiep xuc vdi chat Idng trong khi bom tiep xuc vdi khdng khi.

Trong cic thiet bj cim tay, khi yeu td tieu hinh hda ddng vai trd quan trpng, vi bom l i phuong i n dung d i n lam giim nang lupng tieu thu, mUc tieu thu <200 mW v i 50 mA khi hoat ddng d dien ap 3V (ed the dung pin hoac ie-quy). Tuy thude vao nhu eau, dien tU edng suit (ddng luc) cd the tfch hpp he thdng tren bo maeh hoac trong mdt vd bom md rdng.

Bing 1: Dac diem ky thuat

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KJch thuAc (khdng ki k^ ii6i vA dAng luti) Ket ndi d6ng luu

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V$t l i ^ t i ^ xiJc v6i v ^ chAt bom D6ngl6nnJilt(nui>c') Ap suit lAn ntit (mn>c') DAng I6n nhit (khi') Ap suit lAn nhit (khi')

Bom mtag 2 cip lr(n casdip 6iia Chit lAng, khi, v i hAn h^p 30 X 1 3 x 3 . 8 mm

dng kq>, duAng kinh ngoii 1.6 mm 0°C-70°C

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6mi;phOt(IOOHz) S50mbu^/gpei(IOOHz) l8mL/phth(3<X)Hz) l(X) mBar/ I.7S psi (300 Hz)

Gii tri ed the thay ddi trong mdt sd dieu kien Ung dung nhit djnh:

1. Gii tri dupe lay vdi bp dieu khien (3ien tuf mp-x dat d bien dp 250 V, tfn hieu SRS

2. Oieu kien: nUde khU ion, nhiet dp phdng, ehe dp thiet lap mp-x: 100 Hz, 250 V, SRS

Trong bai nay, chung tdi d i gidi thieu mdt giii phip rat hUu ich eho cic nha phat trien he thdng tich hcJp vi lUu, cim bien hda hpc. Vao thdi diem nay, cd the cic dU i n tuy bien trong thiet ke chua phd bien tai Viet Nam nhUng, theo y ki^n chu quan eua ngUdi viet, xu hudng niy la tat yeu v i se dien ra trong thdi gian tdi diy. Oie biet la vdi eie thiet bj cam tay, Ung dung trong do ludng, chan doin sdm... •

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