. Dieing 4: Sink E F T, tong PA= 5, thng
c) Cac chi dO hoot dOng tiet kiem Wing lugng
Bat ke phuang phip truy nh$p moi trutmg truyen din nao dirge sir dyng cho mpg Sensor du phai trq cac kik hoot gong tiet kiem nang luqng cho nut Sensor. Vi dy re rang nhit cita viec bao din nguen nang luqng la tit 130 thu phat khi n6 kitting dirge you au. Mac du, phuang phip tiet kiem ruing lugng My duang nhu cung cap sy tang them Wing lugng nhung mOt diem quan trqng khemg dirge phep b6 qua 11 the nut Sensor lien lac bing cac gOi sO lieu ngin. Cac g6i cling ngin thl nang lugng khoi kich cing noi trOi. Trong thyc te, neu chi mg ta tit thief N v8 tuyen mOt cich may mac trong
thtri gian khe r6i, cluing ta c6 the lam cho fling lugng lieu thy nhieu han khi thiet N
nay dirge b0t. Kit qui li hoot dOng trong mOt chi dO tilt kiem Wing luqng chi dot hieu suit :ling luqng cao nen thin gian dirge sir dyng the dO d6 Ian han yeti mOt glen hon nao dO. CO mOt so chi dO co ich nhu viy hp dyng cho nut Sensor kW:mg day, tut thuOc
vio s6 lugng tong than cult vi xi: lt, 130 nha, b0 Bien diti A/D vi 130 thu phat. M8i chi dO nay ci the dirge m8 to bang sir lieu thu Wing lugng ctia nto vi nang luqng chuyen
trong thai tir vi tea the dO d6. MOt phucmg phip quan ly nang luqng dOng cho mang Sensor kung day nghien thu ye nom chi dO tiet hem &Mg luqng va viec chuyin tiep
gifts cac chi dO dt. Then gian gieri hart tai thieu cho m6i the dO phy thuOc vac thbi gian chuyen titp vi yeu eau ve tieu thy niing luqng cua rieng timg the dO.
Qua iy nguin cling suit
Gia thinh thip vi sy tieu thu Ming luqng thip la nhOng yin de dm mang cim bien kheing day, ne het sire quan trong trong viec thiet ke thong cung dip nguim trong mOt node cam hien .
Van di quin ly cong suit dupe ket hqp cung cac node mang cam hien, dya tren sy cung cap vi tieu thy: Khi c6 mOt sy cung cap rang luqng, node phai tieu thy no b tic dO thip !that c6 the. Vin de ter nen pink tip, beri ciu tree fling luqng dirge cung cap bed nguem sir cap thl hiem khi tad uu cho nhon va truyen so lieu. Hon nta, ding suit khi dyng tir ngutn va sy tieu thy trong viec truyen nh(m dff lieu !chic nhau 6 mqi thbi diem, viec truyen nhOn dit lieu phiti dirge cung cap hqp ly tai tit ci then gian de dam bio yen Minh ding.
C6 rat nhieu cite nguem Ong swat khac nhau vi the thiet bj c6 dO hien dOng 16n, do deo kh8ng c6 mOt he thong cung cap cong suit rieng 16 nao dirge tti uu cho the node mang cam bien Wong day. Thay vao d6 thiet ke he thOng can phu hqp gitta ngu6n cong suit v6i mach nap di? lieu. Khi the ngu6n dien (nhu la PIN) hoc the ngu6n khac cong sy hart chi ve Wing luqng doge sir dyng thi he thOng phai duqc thiet ke de vOn hanh yeti sy tieu thu cong suit nh6 nhit cei the. Do de se tai da chu ky song ctia node. Khi Gong nghe nguoin each (energy-scavenging) doge sir dyng, se met rung then gian ton tai cim nit mang. Neu 6 mOt then diem &to d6 cong suit ngutn lem hon gia trj doge you eau thl mOt vii dui tyc ve dieu kien nguem se yeu eau ngutn nang Iugng thu cap. Tit nhien, gia thAnh vi hieu qui cim he thing ltru tra thu cap phiti bao gem trong viec duet ke node mang.
Sy thiet ke bit ky he thOng cung cap cling suit nio deu bit du cling sy km chip ngu6n cong suit. De cap trong sy lya chqn mOt nguon tang suit bao g6m: dO khi dung, gii ban diu vi gia vOn hinh, thbi gian giDra the djch vu, khi nang chju dyng ben trong, dien tip khi dyng, kich thu6c va m6i quan tam toi sinh thai tux. MOt sy lya chqn cac nguen dog suit dien thu gin doge de cop cho the img dyng ngu6n thip.
RO ring, khi niing lim viec cim ngthin cong suit la dieu quan trong diu flan. Tuy nhien to phai xet den sy ttrcmg quan gitta khi rding lam viec v6i gii thinh coa ngu6n. Doc biet la v6i ngu6n mOt chieu. Day la loai ngutn c6 gii think tucmg dtd thip va hien dang dirge sir dyng rung rai tren the gi6i. Then gian giata the Ian bio duOng cong
ip dung de chia khoing than gian trung binh gifts cic lin biro throng mOi node li het sire quan trqng di duy tri mang. Qui tic My la tieu diem cia cic thiet ke tren quan diem dm ngtrii sir dung.
Dien trey trong mkt nguOn lit het sire quan trqng, bii ding dien chay trong cic node mang cam bitm li khi nh6. Hon am, Cic cam bien thutmg a trang thii nghi trong khoing then gian dii sau mOt chu ky hoat dung ding cao. Ngutin yeti dien ter trong cao ci the dip ling nhu ciu ding dien trung binh cia node mang vi cic cim bien ctIng cic hoe dung, nhung Ichang dip img dirge ding dinh cao. Ngueon ding suit phii co khi rang cung cip ding cao an thiet ma khong c6 hien tuqng roi dien ip ngoii.
Viec ran dien ip c6 the gay ra viec khei dung lai bO vi xu V', mit dtt lieu, hoc cic tic dOng c6 hai khic. Cac nguOn cing vii dien fro trong cao cin phii dirge dieu hoa, thong thtrtmg viec dieu duii dang mOt tµ dien ho(ic mOt nguOn melt chieu dien trey trong thip lim trung gian de h8 try cho cac ding dinh, hon nuns ching cling ce khi ning cung cip ding trung binh a ding. Cic ngutam ci dien ter trong thug theo tiled gian se c6 thai gian song !thong phu thuOc vi o sum du tit Wing lugng coca ching ma phy thuem vio stir mit khi rang h8 trq ding dinh yeu au.