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Wireless control of powered wheelchairs

with tongue motion using tongue drive

assistive technology(TDS)

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What is TDS?

TONGUE–OPERATED  assistive technology forpeople with severe disability to control their

environment

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PURPS! " T#! PR$!%T

  Traumatic spinal cord in&ury 

Paralysis

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!'ST* +SSST,! T!%#-*!S.

Sip-and-Puff wheel chair

Joysic! "onrolled

#oice aci$aed powered wheelchair %ead conrol

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Why Tongue?...

• MUSCL fibers in tongue is similar to heart muscle fibers

• L!W rate of "erceived #ertion

• $%&CTL' connected to the brain

• (%$$) inside mouth will give a certain degree of privacy

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"RT /+%0 

-!"T R*#T

  1+*!T PST

/+S% PR%P-!

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TR+S1TT!R /-%0 D+*R+1

HALL SENSOR 

HALL SENSOR 

HALL SENSOR 

HALL SENSOR 

1%ROCONTROLLE

R 

(AT89S52)

RF Transmitter 

Front

Back 

Left

Ri!t

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R!%!,!R /-%0 D+*R+1

"#CROCONTROLLE

R 

($89%5&R'2)

RF Receier 

"otor2

"otor&

"otor 'rier 

$RO#"#T*

SENSOR 

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%ARD&ARE

S!SR2 #all effect sensor

• TRANS'+CER ,!ic! aries its

o-t.-t o/tae in res.onse to

c!anes in manetic fie/0•  #n.-t %o/tae1 35% 4 2%

•  O-t.-t is a 0iita/ o/tae an036 %

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7 8 Btes of #n4Sstem Re.roramma:/eF/as! "emor3

7 25; < 84:it #nterna/ RA"

7 62 $roramma:/e #=O Lines

7 T!ree &;4:it Timer=Co-nters

7 Ei!t #nterr-.t So-rces

Microcontroller*+T,-S/0

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RF Transceier 

• #ts fre>-enc is 66"H?

• #t can transmit -.to & meters

0istance

• HT&2E is t!e Enco0er 

• HT&2' is t!e 'eco0er 

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#2/RD*! DR,!R 

• L296

• Bi0irectiona/4H Bri0e

0rier 

• 5% .o,er s-../ is ien

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D% 1TRS

• &2% 'C motors

• +SE' 2 motors1 Left an0 ri!t

• LEFT motor at rest an0 ri!t in

motion t-rn e!ic/e /eft an0 ice ersa

• FOR for,ar0 an0 :ack,ar0 motion

 :ot! t!e motors are 0rien in same

0irection ,it! same s.ee0

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S"TW+R!S

•

 ei/ @%ision 6• Lan-ae 1 Em:e00e0 C

• F/as! "aic

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+PP-%+T +D "UTUR! S%P!

•#t em.o,ers .eo./e ,it! 0isa:i/it to ac!iee ma

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DS+D,+T+*!S

• +SERS s!o-/0 aoi0 insertinferromanetic o:ects in t!eir mo-t!3

• "ANET#C tracer s!o-/0 :e remoe0 if

t!e -ser is -n0eroin "R#3

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%#+--!*!S

e !ae faces a n-m:er of c!a//enes int!is .roect an0 a/so /earne0 a n-m:er of

ne, terms an0 microcontro//er termino/o3

• Ha// sensor o-t.-t o/tae ,as not

eno-! to actiate a microcontro//er .in3• Back E3"3F .ro0-ce0 : motors3

• E

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Q

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R!"!R!%!S•*o-sefiD -e/ian H-oD !oan/oo " $re/iminar assessment of

Ton-e 'rie Sstem in me0i-m term -sae for com.-ter access an0

,!ee/c!air contro/D Enineerin in "e0icine an0 Bio/o SocietD

E"BCD 2&& Ann-a/ #nternationa/ Conference oft!e #EEED $aes 5;; 4 5;9D A-36 2&& 4 Se.t36 2&&

•!tt.1==,,,3ne,s3atec!3e0-=feat-res=ton-e40rie4,!ee/c!air 

•Assistie tec!no/o 0eicesD Aai/a:/e1

!tt.1==,,,3,!ee/c!airnet3or=CN$ro0Ser=$ro0-cts=Ot!erAT.ro03!t

m#

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