Cảm biến không dây tự nạp năng lượng

The giai Cam bi^n

CAM BIEN KHONG DAY

TU NAP NAN G LUONG

Ky thuat nap nang luomg dat ra mot sir lira chon trong viec thiet ke nguon cua cam bien,

cho phep khong can dung pin, giam chi phi va co the mo rong cac tien ich cua cam bien

trong nhieu img dung. Edward va Steve da gioi thieu img dung ciia mot loai cam bien ap

suat khong day va bo demo cua no tLrong thich vdi tieu chuan IEEE 802.15.4, dugc cap

nguon bang each lay nang luomg rung tir mot phan tCrsgi gom ap dien.

Ngay nay ta cd the trien khai eac ung dung Bang each su dung mpt qua trinh da dupc cap bang

giam sat khdng day cd chi phi thap, tudi tho sang che, Advanced Ceramethes san xua't cac sai

cao va tieu thu it dien nang theo tieu chuan piezo gdm dai, linh hoat va re. Op linh hoat dupe cai

IEEE 802.15.4 va cam bien ZigBee. Pin cd thien dang ke bang each them mpt lap dat mdng, cung

tudi tho cao da cho phep cac cam bien tdn tai ddc cap bd chuyen ddi phuc hop rat ben va cd the tao hinh

lap trong nhieu mdi trudng ma khdng can ndi day cap theo dinh dang ciia ngudi diing, cho phep gan chatvao

ngudn. Nhung vdi hang trieu cac cam bien khong cac ca eau ea khi ed su dao ddng. Cac bd chuyen ddi

day se dupc trien khai trong thap ky tdi, viee thay the loai nay da dupe ung dung de chuyen ddi co nang

hang trieu qua pin (hay toan bd eac cam bien) se thanh dien nang vdi hieu suat dat 70%.

phai chju mdt ehi phi Idn, dac biet la eac cam bien

nhimg va cam bien d nhung nai khd tiep can. Cdng nghe Sdi gdm mdj khdi ngudn nang lifdng piezo

Hay thu tudng tupng rang pin dien thoai cd the tu

Cd sd cua Uiec nap nang llfdng nap dien lai khi ban deo no ben hdng. Hoac mpt cam

Viec khai thac cac ngudn nang lupng tu mdi bien khdng day dupe cap dien tu si/ chuyen dpng

trudng xung quanh nhu su dao ddng ed the loai bo eua thie't bj ma nd cam irng. Odng nghe chdng rung

viec phai su dung pin trong cae ung dung giam sat, da duac cap ngudn nhu the nao tu su di chuyen

keo dai tudi thp va giam dang ke chi phi van hanh manh ma chiing dang cd gdng triet tieu?

ciia cam bien. Nang lupng lay dupe do su dao ddng Nhung ung dung kieu nhu vay mdi ehi'la phan ndi

eiia cac spi ap dien gia re trd thanh ngudn cd sin cua tang bang trdi. Advanced Ceramethes cua

thay the cho pin trong eac ung dung giam sat. Cae Lambertville, New Jersey da phat then mdt cong

cam bien dupe cap ngudn tu su dao ddng cd the dl nghe mdi ed the tao ra mdt ngudn dien cd cdng sua't

dang dupc tich hop vao trong ke't eau va may hoac bang 10 lan cua cac dang piezo linh hoat khac.

ed the lap dat trong eac mdi trudng khac nghiet ma Cong nghe nay la mdt bien the hoan toan mdi dua

binh thudng rat khd khan trong viee thay pin. tren phuang tien phat dien eu va dang luu tam la ap dien.

Nang lupng tu su dao dpng ed the dupc khai thac

bang rat nhieu each khae nhau nhu chuyen ddi dien TlTdien nang tdi Cd nang va ngiTdC lai

tu, tinh dien hoac ap dien. Trong phuang phap ap Nam 1880, Pierre va Jacques Oune da phat hien

dien (piezo), dt/a tren co so dao dpng cua cac vat ra rdng cae tinh the phat ra mot dien tu khi bi tac

lieu ap dien, ngudi ta ed the tao nen mdt bd nap de dpng manh. Ho da tudng rdng dd la eac tinh the

phat ra mdt dien^ap co dd Idn tuong ung vdi kich cd piezo, theo tieng Hilap cd nghTa la dp.

va hinh dang cua vat lieu ap dien cung nhu tinh ehu Cae tinh the ap dien ddng vai trd nhu nhi/ng bp

ky va dd Idn cua luc tac ddng. chuyen ddi. Chung bien ca nang thanh dien nang. 34 : Automdtion Toddy 55 5 (gi) 9007