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1. Gi6'i thieu t6ng guan ve he thong

H¢ thi/ng am thanh cong cqng:

- H¢ thong am thanh cong c¢ng con duqc g9i Ht h¢ thong phat thanh cong c¢ng (Public Address) nha tinh chat truy~n tai am thanh cua h¢ thong chu yeu la phl;lc Vl;l truy~n tai cac thong di¢p tlr giQng noi CUa COn nguai.

- Chuc nang cua h¢ thong am thanh thong bao la tai t~o l~i am thanh tu ngu6n phat, cac thong di¢p tu giQng n6i cua con nguai sau d6 khuech d~i qua h¢ thong khuech d~i va xu ly am thanh r6i truy~n t6i tai nguai nghe.

- Cac ngu6n am thanh thong bao c6 th~ la cac ngu6n thong bao tu cac thiet b! luu gifr thong tin nhU h¢ thong may tinh, dau bang dia cac lo~i hay am thanh trJ!C tiep tu h¢ thong micro.

- H¢ thong am thanh cong c¢ng duqc Slr dyng r¢ng rai trong cac ling dl;lng nhu trong cac toa nha, khu nghi mat, khach s~n, h<?i hQp, h<?i truang, mitting[l nhfrng noi rna yeu cau nghiem ng~t v~ tinh trung thvc cua am thanh, d(> r5 net cua giQng n6i va tinh thich ling cao cua h¢ thong v6i moi truemg xung quanh duqc doi hoi.

- Cac thiet b! cau thanh h¢ thong bao g6m b¢ thu tieng/phat tieng ( cac micro - c6 day, khong day cai ao, ban gQi, casssette, CD ), h¢ thong xu ly tin hi¢u am thanh (khoi di~u khi~n, khoi giam sat), h¢ thong khuech d~i am thanh (am ly), h¢ thong tai t~o am thanh (loa nen, loa c(>t, loa tran, loa h<?p ... ) va khoi ngu6n.

- Tin hi¢u am thanh duqc t~o ra/thu duqc nha h¢ thong thu tieng phat tieng duqc dua den b¢ xu ly am thanh d~ hi¢u chinh l~i, phan va chQn vling. Sau d6 duqc dua den h¢ thong cac am ly d~ duqc khuech d~i ra cong suat Ian hon r6i duqc dua ra cac loa.

2. Yeu cau ky thmlt doi vo·i he thong am thanh cong cong PA

- H¢ thong truy~n thanh bao SJ! co phai d~lm bao cho vi¢c truy~n tai nhanh va

chu~n xac nhat den nguai nghe trong truang hqp c6 cac SJ! co xay ra. Am thanh

trung thl;l'C, ro rang, am luqng di~u chinh dUQ'C, dam bao cung cap cac ban tin

thong bao tai tat ca m9i nguai tranh gay hoimg lo~n ho~C t~O tam ly hoang mang

khong can thiet.

- Cac tin hi¢u thong bao phai c6 ap llfC am thanh du m~nh t~i tat ca cac vling, ty

so tin hi¢u tren t~p am du Ian, cao hon d(> 6n khong gian ben trong toa nha.

- H¢ thong thong bao duqc phan vung hqp ly, bao dam cung cap thong tin tot, t6i

dung khu Vl!C can thiet, tranh hi¢n tuqng lQn XQn trong toan b(> toa nha trong

truang hqp kh~n cap ..

- Thiet b! phai mang tinh hi¢n d~i, duqc slm xuat boi cac hang c6 tinh chuyen

nghi¢p cao trong linh Vl;l'C san xuat thiet b! am thanh PA chuyen dl;lng.

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- H¢ thong doi hoi cung cap am thanh, phat nh?c v6i tfnh trung thvc cao, chuftn,

d¢ ro net cua gi9ng n6i va tfnh thfch nghi cua h¢ thong trong cac moi tnremg Utm

vi¢c khac nhau.

- Yeu diu chung

- Cac thiet bi phai dam bao tfnh d6ng b¢ cao, kha nang tfch hqp v6i cac h¢ thong

khac, lam vi¢c 6n dinh, giam thi~u t6i mll'c thap nhat anh huang cua cac yeu to

khach quan mang l?i nhu khf h~u, thai tietL ,

- Vi¢c lilp d~t phai dam bao phil hqp v6i kien tnk cua toa nha va canh quan xung

quanh, dam bao my quan khi Iap d~t

- H¢ thong xay dlfng phai dam bao tfnh kinh te va tfnh hi¢u qua cao trong vi¢c si'r

dl;Jng sau nay.

3. Mo ta h~ thong h~ thong P A cho toa nha.

- H¢ thong am thanh bao sv co thiet ke cho toa nha xay dlfng tren co sa g6m cac

chuc nang chfnh:

+ Phl;IC V\1 ho?t d¢ng di~u hanh, giam sat ho?t d¢ng t?i cac t~ng, cung cap

thong tin c~n thiet t6i m9i nguoi ho?t d¢ng trong khu vvc cac t~ng.

+ Thong bao, huang d~n thoat hi~m trong truang hqp khftn cap nhu thong

bao an ninh, thong bao phong chay, chua chayll cho ttrng vung ho~c toan

b¢ toa nha

+ Thong bao nhiln tin (tlm nguoi) qua microphone (tu phong trung tam, tu

cac di~m d~t ban g9i phl;l) cho m9i nguoi c6 m~t trong toa nha khi c~n

thiet.

+ Phat di cac thong bao da duqc ghi am tru6c khi thong bao het gia cho cac

d¢c gia, phat nh?C n~n a qu~y giai khat.

- H¢ thong am thanh thong bao duqc thiet ke dlfa tren ca sa h¢ thong am thanh ky

thu~t so, c6 chat luqng cao.

D~u vao h¢ thong:

- Tfn hi¢u am thanh tu d~u vao cua ban di~u khi~n noi v6i b¢ di~u khi~n trung

tam chuyen m?Ch den tUng vung ho~C toan b¢ toa nha theo y muon CUa nguai di~u

khien.

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.. -

} -

- f)au vao cua h~ thong la ban di~u khi~n thong bao lo(;li 6 vung va cso cac ban

phfm rna r¢ng vung d~t t(;li phong di~u khi~n trung tam cho phep phat di cac thong

bao trgc tiep tu nhan vien v~n hanh ho~c 1~ tan, ky thu~t LI cua toa nha.

- Dau vao cua h~ thong cling c6 th~ su dl;lng cac thiet bi phat am thanh nhu: B¢

qulm ly tin nhtm, dau DVD, CD, May tfnh d~ lam ngu6n am cung cap cho h~

tong phat den cac vung.

B¢ xu ly trung tam

- Trung tam xu ly tfn hi~u bao g6m: b¢ rna tr~n ky thu~t so quan ly cac dau vao

va dau ra, khoi cap ngu6n trgc tiep va ngu6n dlf phong, amply khuech d(;li cong

suat. Khoi trung tam xu ly c6 chll'c nang cap ngu6n, ket noi v6i ban g9i va ngu6n

nhi;lC ngoai, Iva ch9n vung loa, qm\n ly chat luqng am thanh cua h~ thong va dua

tfn hi~u am thanh cong suat ra h~ thong loa.

- B¢ di~u khi~n trung tam la lo?i di~u khi~n am thanh da kenh, di~u khi~n vi xu

ly theo cau true module h6a va h~ thong dinh tuyen tfn hi~u ky thu~t so, dam bao

day du cac tfnh nang v6i am thanh chat luqng cao

- B¢ di~u khi~n trung tam duqc tfch hqp h¢ thong giam sat ky thu~t so c6 th~ tg

giam sat 16i cho toan b¢ h¢ thong (duemg loa, ban g9i, amly cong suatU) va chong

16i, dam bao dap ll'ng yeu cau theo tieu chuftn IEC 60849 quy dinh cho h¢ thong

am thanh canh bao khftn cap.

- Tfnh nang di~u khi~n phat cac thong di¢p ( c6 tieng chuong bao tru6c )cho nhi~u

vling loa khac nhau t?i cung m¢t thai di~m. Kha nang tg d¢ng lam giam am luqng

nh?c n~n m6i khi phat thong bao & am phat phat l?i v6i am luqng tang dan khi

thong bao dtrng la m¢t trong nhfing tfnh nang vuqt tr¢i cua b¢ xu ly

- Amly khuech d?i cong suat duqc tfnh toan dam bao cung cap du cong suat cho

h~ thong hO(;lt d(>ng, phat am thanh thong bao va phat nhi;lC n~n Va dlf phong khi CO

sv co.

Dau ra he thi/ng

- Tfn hi¢u tub¢ xu ly trung tam duqc dua ra m(;lng lu6i loa tran duqc thiet ke theo

nhfrng vung nhat dinh. Cong suat ra cua loa duqc tfnh toan, dam bao truemg am

thanh trong vling la d6ng d~u, v6i chat luqng am thanh cao.

- Ti;li m6i vung duqc thiet ke c6 th~ c6 chiet ap di~u chinh am luqng d~ su dl;lng

tang giam mac am thanh trong cac truemg h9p can thiet rna khong anh huang den

vi¢c thong bao trong truemg hqp khftn cap, dam bao yeu cau cua h¢ thong am

thanh thong bao.

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. -

- Vi~c phfiil vung loa duqc th-gc hi~n d-ga tren yeu ctiu C\} the ve m\}C dfch si'r d\}ng

cua toa nha. V6i vi~c phan vung loa nhu v~y nguai dung c6 the ch9n 1-ga de phat

cac thong bao trong truang hqp khftn cap, nhan tin ho~c lien l~c t6i tl.rng vung

rieng bi~t hay trong toan b¢ toa nha.

- V6i yeu ctiu thie't Danh m\}c thie't b! chfnh dt! kie'n theo bimg du6i day

4. Yeu cau ky thm)t cua cac thiet bj chinh h¢ thong P A.

Bt) die'u khiln trung tam

- B¢ dieu khien trung tam duqc thie't ke' ke't hqp dtiy du cac tfnh nang thie't ye'u

ctin thie't cho h~ thong am thanh thong bao

- Ma tr~n dieu khien ki thu~t so va cong ngh~ dieu khien da kenh v6i dieu khien

am luqng toan b¢ cac kenh vao ra. B¢ t~o tfn hi~u d.nh bao theo tieu chuiln quoc te'

nhu chuiln DIN 33404 h6 trq cac thong bao

- Cac kenh vao duqc hi~u chinh bai cac m~ch 19C ttln so rieng bi~t bao g6m m~ch

l9c thong qua cao I thap , m£;1ch l9c thong cao/thap kieu Shelving , m£;1ch l9c thong

so.T~o ra tfn hi~u giam sat cho cac thie't b! ben trong va giam sat b¢ khuech d~i

cong suat.

- B¢ t~o dao d¢ng d6ng h6 n<?i t~i c6 the ket noi v6i 40 thie't bj khac de t~o tfn

hi~u dao d¢ng d6ng h6, d6ng b¢ cho to an h~ thong

- Duqc thie't ke c6 cac relay tfch hqp de de dang ke't noi tfch hqp v6i cac h~ thong

khac trong toa nha nhu BMS, Fire alarm,

- Tfch hqp 6 b<? Ch9n vung rieng bi~t cho 6 vung d<?c l~p.

- Tfch hqp lien amply khuech d~i cong suat.

- Thong bao 16i bang tr~ng thai den LED, cong suat va DCF 77.

- H~ thong xung chfnh, dieu khien bang th~ch anh, d!nh huang ke't noi len t6i 40

d6ng h6 ph\}.

- C6 the l~p trlnh duqc theo sv ki~n.

- Tfch hqp san cac tfnh nhan Voice ben trong va l~p trlnh phat theo cac s-g ki~n

djnh tru6c.

- Kha nang ke't noi rna v6i cac h~ thong khac linh d¢ng .

Bt) mil rt)ng vitng tim thanh.

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- La b¢ d!nh tuyen rna r()ng them vung cho b¢ dieu khien trung tam d~ dam bao

so vling theo yeu diu.

- Ket noi tiVC tiep v6i b<? dieu khi~n trung tam va ho(;lt d¢ng theo cac tfnh nang

khai bao l~p trlnh cua b<? dieu khi~n trung tam .

- Ma r()ng them so vung loa ng6 ra, triger ng6 vao/ra cho b¢ dieu khi~n trung

tam.

- Tv d()ng giam sat h¢ thong theo tieu chu~n IEC60849, am bao d()ng ki thu~t so

tieu chu~n quoc gia & quoc te DIN 33404.

- Cong ngh¢ xi'r If bao ky thu~t so mang l1;1i tfnh 6n d!nh cao cho thiet bt.

Micro thong bao.

- Ban dieu khien thong bao tfch hqp b¢ vi xi'r If dieu khi~n cac tfnh nang va giao

tiep dfr li¢u v6i khoi trung tam. M~ch vong W giam sat theo chu~n IEC 60849

- Kha nang l~p trlnh nh(;lC nen tu ban g9i va tfnh nang khac.

- Den bao zone va tr1;1ng thai ho1;1t d¢ng.

A.mzy khutch d{li cong suat

- Amly khuech ct~i cong suat co muc cong xuat phu hqp v6i cong xuat thiet ke,

duqc thiet ke cho cac m1:1c dkh si'r dl;lng trong h¢ thong am thanh thong bao.

- C6 nhieu ng6 ra 70V, lOOV, 80hm nen rat linh ho1;1t d~ ket noi v6i cac chung

lo~i loa va cac yeu c~u ve muc cong suat khac nhau trong h¢ thong.

- C6 h6 trq tfnh nang dieu khi~n tu xa

- Dieu khien muc d~u vao, ng~t tieng, ng~t ngu6n, tn~, giam sat tuyen tfn hi¢u.

- Giam sat qua nhi¢t, muc d~u vao, muc d~u ra, dubng loa.

Loa gan tra'n thong bao

La lo1;1i loa trfrn duqc thiet ke v6i kieu dang d~p, nho g9n, rat phu hqp cho cac

Ung dl;lng phong vua va nho, duqc thiet ke v6i kieu dang d~p, chk ch~n v6i khung

va lu6i bao v¢ bting hqp kim c6 chat hrqng cao duqc phu son mau trang.

V 6i 4 muc cong suat ra ( 1.5 - 6W), ngu·ai si'r dl;lng c6 the ch9n cac muc ra

phu hqp v6i khong gian phong hqp ly theo nhu c~u si'r dl;lng.

Dai t~n ho~t d()ng r()ng.

Loa coi thong bao

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-.

La lo~i nen duqc thiet ke v6i ki~u dang dyp, gc;m, rat phu hqp cho cac tang

ham, khu mai, ban cong ngoai nha.

V6i 3 muc cong suat ra (10, 5, 2,5W), nguai sir dl}ng c6 th~ chc;m cac muc ra

phu hqp v6i khong gian hqp ly theo nhu cau sir dl}ng.

Dai tan ho~t d¢ng r<?ng.

lJil'u DVD, CD, TUNER

Dau DVD, CD Tuner thiet ke c6 kieu dang dyp, chac chan, am thanh HIFI, c6

th~ vl.ra phat CD, DVD, MP3 d6ng tho tich hqp luon b¢ Digital Tuner giup thu cac

chuang trlnh phat thanh tren song FM, ----~--~----------~~-~----------~-------v. H¢ thong BMS

v.t. Mo ta h¢ thong.

H~ thong BMS (Building management system) la h~ thong thai gian thl}'c,

tfl}'c tuyen, da phuang ti~n nhieu nguai dung, H~ thong vi su ly trung tam bao

g6m cac b<? vi sir If cung ch~y tren m<?t h~ tang m~ng va duqc giam sat dieu khien thong qua di~n trung tam, cac thiet bi vao I ra, cac b¢ vi xu ly khu Vl}'C,

cac b<? cam bien duqc dieu khien qua rna tr~n di~m.

- H~ thong BMS duqc thiet ke hoan chinh bao g6m cac thiet bi trung tam, thiet

bi giam sat cac ho~t d¢ng va cac b¢ vi sir l:Y khu Vl}'c duqc tfch hqp vai nhau

cung tren h~ tang m~g . Thiet bi trung tam se dieu khien cac chuc nang ling dl}ng chung va cung cap cho st;r thong nhat va tinh toan du li~u. cac du li~u

duqc gi'ri vao cac tin hi~u dieu khien ra se la cac chuc nang ciia b<? vi xu ly

trung tam.

- H~ thong se cung cap cac dieu ki~n cho ho~t d¢ng giao tiep va dieu khien ra

ben ngoai, Sl}' thao tac XU ly cac dfr li~U d(>ng, giam sat h~ thong va cac diem

dieu khien h~ thortg se duqc li~t ke trong bang rna tr~ diem dieu khien cling

nhu the hi~n tren ban ve

- H~ thong BMS la h~ thong dieu khien va quan ly toa nha hi~n d~i mang tinh

t6ng the cling v6i cac san phan mem chuyen dl]ng dap ling duqc cac tinh nang

ky thu~t cling nhu cac giai phap dieu khien v6i cong ngh~ tien tien duqc ling . dl}ng den tlrn.g thiet bi cua h~ thong toa nha nhu sau :

+ H~ thong dieu hoa khong khi, thong gi6 dieu ap.

+ Cac h~ thong phong chay chua chay

+ H~ thong chieu sang

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