Tuyen tap bao cao khoa hgc Hdi nghi Khoa hgc ky thuat Do ludng toan qudc Un thfl IV Hd Ngi, 11 • 2005
THIET Bj KIEM TRA T l / DONG NGUdN DIEN HOA DAC BIET Sir DUNG KY THUAT VI x Q LY
Do Vdn Lap, Nguyin Thanh Hiing, Nguyen San Hdi, Le Viet Hoan Vien Ten Ida, Trung tdm KHKT - CN Qudn sif
Tdm tdt:
Kiem ti a ngudn dien hod ddc biet (DHDB) dimg trong khi tdi qudn sif Id rd't cdn thie't, gdp phdu ddm hdo tinh sdn sdng chie'n dd'u cao ctia cdc khi tdi qudn stf cd su dung nguon dieu ndy. vi vdy diie't hi kiem tra phdi difffc tif ddiig hod de ddm hdo tinh chinh xdc vd hien qud trong viec dm thdp vd ddnh gid cdt tham sd'i tta ngudn dien. Tren cff sd phdn tich ddc tinh vd cdc tham so cdu kiem tra liia ngudn DHDB, bdo cdo triiili hdy mgt sd gidi phdp thie't ke che tgo diie't bi kiem tra tif ddng ngudn DHDB ifng dung ky thudt Vi xi'f Iy ke't hgi) ghep nd'i mdy tinh di thu thdp vd lifu gli'f lieu. Thie't bi cd khd udng kieni tra ddc tinh ddng vd ddnh gid chd't lifang t ua ngudn DHDB dem Igi do i hinh .\dc vd hieu qua cao.
Abstract:
Testing Special chemital elictn'c power (SCEP), which is applied in military equipment is very net es.sary to help ensuring that they are ready for t onihat. so the testing device must to he automated to eusuie the accuracy and effect in the question, whiih collect and asse.ss power's parameter. Ou basis of property analytic and pai amelers need to le.st of SCEP, the report presents some soluUou to design and make SCEP automatic testing device apply microcontroler technical and comhiue computei to colect and save data. The device can test dynamic property and assess quality of SCEP, bring about accuracy and high effect.
I. DAT VAN DE
Ngudn difin hda dac bifit (NDHDB) la loai ngudn bifi'n hda nang Ihanh difin nang thdng qua phan flng hda hgc khi cd kfch thich. Loai ngudn nay ihudng sfl dung trfin cac thiet bi bay qudn su va cd vai Ird dac biet Irong vific cd'p ngudn cho hfi didu khidn thie'i bi bay dfi'n dfch. Trong qua trinh bao quan khf tai, vific kiem tra cac thdng sd cua chung Iheo dinh ky nhdm ddnh gia trang ihdi san sang cua ca ihie'l bi la rd't cdn thifi't. Trudc day ta da cd Ihifi't bi phuc vu cho vific kidm tra loai ngudn difin nay nhung dd la nhflng thifi't bj Ihao tac bdng tay va cac Ihdng sd thu dugc phai quan sal bdng mdt Ihudng, luu gifl du lieu thdng qua ghi chep, didu dd d5n dfi'n mot so han che nhu: dd chfnh xac cua cac sd lieu thu dugc la khdng cao. sd lifiu cd thd bi md't do mdt sd qua trinh xay ra tuong ddi nhanh khie'n ta khdng kip ghi lai. Viec thao tdc bdng tay la khdng dap ung td'i cdc yeu cdu vd thdi gian trong viec kifim tra do nha san xuat dua ra. Do vay viec tu ddng hda qud irinh kidm tra, luu gifl dfl lieu CLia qua trinh la difiu bet sflc can thifi't.
849
Ngay nay vdi su phat trien manh me cua ky thuat vi xu ly vd vdi nbijiig bifiu qua vugt trdi ma chung mang lai trong cac ITnh vuc do ludng va didu khidn nfin nhdm tac gia da chgn giai phap sfl dung vi xfl ly trong vific hien dai hod thiet bi kidm tra ngudn dien hda dac bifit.
Trong thie't bj da cai lifin. vi xfl ly se cd vai trd tir ddng dicu khien ta't ca cac qua Irinh ma tRfdc day phai thao tac Ihii cdng nhu: ddng ngdt cho cdc van, cac ro le difiu khidn va ro le thu thap dfl lifiu, ben canh dd vi xfl ly ciing dam nhdn vai trd thu thap, xfl ly dfl lifiu do dugc thdng qua bd bifi'n ddi tuong tu - sd "ADC0809" 8 bit va ghep ndi may tfnh dd ve dd ihj va luu gifl dfl lieu mdi each hodn loan tu dgng.
II. GI61 THIEU -'NGUON DIEN HOA DAC BIET"
Ngudn difin hda dac bict dugc kidm Ira d ddy la 2 loai pin d'ng do Nga chfi' tao.
Loai pin d'ng 318 cd:
- Difin ap: 27!^ ^ V , sai sd ± 0,5V.
- Ddng djnh mflc: I lOA tai 2?!', ^ V . - Thdi gian kifim tra : 110s.
Loai pin d'ng B25 cd:
-Difin dp: 2 7 ' ' „ V sai s d ± 0,5 V.
- Ddng dicn: 3 lai + R, = 5 , 7 n ; I , =0,5A.
+ R , = I 5 Q ; L = 1,8A.
+ R, = 6 , 7 0 ; I, = 4,2A.
- Thdi gian kifim ira: 620s.
Chung chi dugc kfch boat khi cd lenh.
Thie't bj kidm tra tu ddng phai dam bao dap flng dflgc ddy du quy trinh kidm tra ddi vdi 2 loai ngudn dien trfin do nha san xuat dua ra.
III. GlAl P H A P THIET KE, CHE TAO THIET BI 3.1. Thiet ke qui trinh kiem tra
Kiem tra pin dug BIH:
- Cap khf: Tlidi gian cap < 7s; dp sud't 11± latm.
- Khi tri sd difin ap dat 27^^ ^; ddng ro le phdng dd ngudn dien phdng dien, ghi va ve dd thi va hidn Ihi cac tham sd dien ap (hoac ddng difin) tai cac thdi didm 7s, 20s, 30s, 40s, SOsva 100s.
- Ve, luu giu dd thi va sd lifiu ciia qua trinh kifi'm tra bdng may tfnh PC.
Kiem tra pin d'ng B25:
- Cap khf: Thdi gian cd'p < 7s, dp suat 1 l±latm.
• Ki^m tra dicn i p tren tai khi dien i p ra cua pin d'ng > 27V theo bang dudi day.
Thdt gian phongts) 0 +.100 .100 + 392 192 T 600 600 - 620
Dong phong dinh rnOlciA) 0,.^
0 l.S 4,2
Dien ap khi phdng (V)
27:;., 27"
27:;., 27:;.,
- Luu dd thi va cac sd lieu dien ap, ddng dien tai cdc ihdi didm: 7s, 300s, 392s, 600s va 692s
- Thifi't bi sau khi thifi't kfi'che'tao phai lam vific dugc d 2 che'dd.
+ Chfi' dd kie'm tra tu ddng bdng may tfnh.
+ Che' dd kidm tra bdng tay.
- Cd'p chfnh xac:
+ Sai so do dien ap ±0,5V.
+ Sai sd do ddng dien ±0,5A.
3.2. Thiet ke he thdng
- Vd'n de tdi: caC dac tfnh phdng cua hai loai ngudn tren dugc kiem tra tren tai dinh mflc tuong flng, vi vdy vific tfnh toan, ihie'l kfi', chfi' t<70 va chgn chfi' dd lam viec vd cdng suat ciaa tai quyfi'l djnh tfnh chinh xac cua cac tham sd thu dugc. Do vay ddi vdi tihig loai ngudn cu thd ta phai linh loan va lua chgn tai ciaa chung mdi cdch chfnh xac phu hgp vdi cdc yfiu cdu ciia nha san xud'l, trong qua trinh hoat ddng cua tai do cdng suat tuong dd'i ldn nfin phai dam bao viin dd lam mdt dfi tranh su thay ddi dien trd do nhiet do tai bifi'n ddi.
- Chgn bg hien ddi tifffiig tif - sd: theo yeu cdu ve do chi'nh xac ciia qua trinh do ddng va dp la < 0,5; ta lua chgn bd chuyfi'n ddi ADC 0809, ddy la bd ADC 8 bfl, nd ddp flng dugc dd chfnh xdc yeu cau.
- Tfl quy trinh cdng nghfi kidm tra cua hai loai ngudn difin hda ndi Irfin nhdm lac gia thifi't ke' thifi't bi dap irng cac yeu cau vdi so dd khdi chfle nang Irinh bay trfin hlnh 1.
220VL;
Ngudn 6.3V
Tbiet bi ddng ngdt
Ngudn mdt chidu
Mach khdi dgng nap
Thiet bj kie'm tra.
Pin dng HT - 1 da chfi' sfla
Mach khdi dpng phdng
khf nen max
I Oat
Pin dng 8K143
-f-Unap
^
Tlii 0.24SC2
Ngudn mdt chieu 12 V,
5V
Mach khuech dai, bie'n ddi
tin hieu Mach A/D
VXL
Thiet bi thu thap dfl lieu
Ddng bd phdng nap, dpc (Thu gom so lifiu)
CPU Man
hmh
Ban phfm,
cbudi PC hien thi va didu khien.
Hinhl. So do khdi chfle nang thie't bi kiem tra Fin ong
- So dd khd'i chfle nang ciia thie't bj vi xfl ly:
Phdn cflng mach vi xfl ly gdm cdc khdi nhu hinh vc- T/h
ap
T/h dong
Phan ap
Khuech dai
ADC 8 bit
Bp tao dao dpng
Tao difin ap so sanh
Khufi'ch dai va chd't du lieu.
He
Vi xuly
O
Chudn ^—^ May RS232 "J—^ tinhDem va k/d don"
Dcni va k/d
Role phdng Hinh 2. So do khdi chfle nang thici bj Ihu thap dfl
Role nap
Kho'i nguon leu - ghep ndi may linh Chd thich:
1. Khd'i ngudn: cung cap ngudn nudi cho cac linh kien irfen bo mach va lam ngudn nudi cho cac Ro le phuc vu viec ddng ngdt qua trinh do ddng dp. Ddu vao khd'i ngudn ta diing dien 220Vx50Hz va ddu ra la cac mflc 5V, I2V.
2. Khd'i lao dao ddng ngoai: tao tin hifiu dao ddng chudn IMH/ cii'p cho bg bie'n ddi tuong l u - s d .
3. Khdi tao dien dp so sanh: tao difin ap chudn va on dinh cap cho bd bifi'n ddi tuong tu-sd.
4. Khdi khue'eh dai: khuech dai tfn hifiu ddng. dp dii Idn dd cung cap cho bg bie'n ddi tuong tu 5. Khd'i bifi'n ddi tuong tu - sd: bien ddi tfn hieu tuong tu sang tfn hifiu so dd dua vao bd vi xuly.
6. He vi xfl ly: dgc dfl lieu va Iruydn dfl lieu cho may tfnh, ddng thdi nhdn lenh tu may tfnh dd dieu khien qud trinh nap hay phdng ddi vdi "NDHDB".
7. Khdi chuin giao tie'p- bie'n ddi tfn hieu tu vi xfl ly dd tuong thfch vdi ddu vao may tfnh va ngugc lai theo chudn RS232.
8. Khdi dfim va khuech dai ddng: khue'eh dai tfn hieu difiu khie'n du dd difiu khifin ro le.
9. Cdc ro le phdng-nap: thuc hifin ddng ngdi cac qua Irinh theo .su didu khidn cua vi xfl If.
Ngoai ra mot mach dinh thdi ciing dugc thifi't ke'dd thuc hien qua trinh chuyen ddi tai trong tnrdng hgp kidm tra ngudn difin B25. Mach nay dugc ihifi't kc ddc lap vdi thie't bi thu thflp du lieu dd tao su don gian trong thie'i kc' phdn cflng va lam vice tin cdy. So dd khd'i mach dinh thdi nhu hinh vc 3.
220Vx50l!z
>
dai ddng
Khdi ngufin
-oV
H R«le 1 I H Ri'if2 1 H Rale 3 |
Hinh 3. S(» dd khdi chfle nang mach dinh thdi chuyen diii tai dien trd 3.3. Thiet ke phan m^m
Vdi phan cflng dugc ihici kfi' nhu da trinh bay ta cd the kifim tra dugc nhidu loai ngudn khac nhau vdi hai kfinh ddng va dp, vdi mdi loai ngudn khac nhau cd nidi qui trinh kidm Ira khac nhau, la giai quyet van di dd bdng each thay ddi phdn mfim. mdi loai ngudn ta cd mdt chuong trinh phdn mfim rifing. Vdi quy trinh kifim 2 loai ngudn B18 va B25 nhu da gidi thifiu d trfin nhdm tac gia da thie'i ke'phdn mfim kic'in ira vdi km dd thuat loan nhu sau:
3.3.I.Loidni;udnBhS I Chon kenh f Starl )
N
Ngimg n«p HiQn Ihl dicn ap
iirmig liiigVs
O X K I C J H rii ciii \
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f YesHicn Ihi dien .ip iirimg I'mg
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Hinhl. Luu dd thuat loan chuong trinh kiem Ira ddng, ap cua B18
3.3 2. Logi ngudn B25
Hinh2. Luu dd thuat toan chuong trinh kiem Ira don;;, dp cua 1}25
IV. KET LUAN
Nhung giai phap trinh bay tren ddy la pbii hgp vdi xu hirdng phat tridn cua khoa hgc cdng nghfi hifin dai. Nd da giai quyet dugc td't ca cac han chfi' ma loai ihifi't bi cu tnrdc day giip phai. Vl vay iheo nhdm uic gui day la mgi gidi phap hgp ly va cd ifnh hifiu qua cao, va day cung la giai phap trong vice Ihie't kfi cac thifii bi do trong nhifiu flng dung khac. ddng thdi giiip chiing la c;ii tifi'n thici bi cii de' cluing dap i'mg dugc nhi~mg chuan cao hon trong do ludng.
Do thifii bj dugc che tao vdi mdi giai phdp hgp ly nfin da cho mdt kei qua boat dgng Idt, thiei bj da chay chinh thuc de kiem tra hai loai ngudn nhu da trinh bay d tren vdi su giam sat cua cac chuyen gia nudc ngoai va da Ihu dugc mdi kfii qua lot vdi dp chfnh xac va hifiu qua cao.
Tdi lieu tham khdo:
[IJ. Ngd Dicn Tap. Do lifang vd dieu khien hdng may tinh. Nhd .\ud't hdn khoa hgc kv
Hd Ndi 1999.
[2} Mil rocontionllei with 4K Byte Memory Flash ATH9C51. ATMliL.