A Wireless Sensory Feedback Device for Real-Time Gait Gts

8/9/2019 A Wireless Sensory Feedback Device for Real-Time Gait Gts

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A Wireless SensoryA Wireless Sensory

Feedback Device for Real-Feedback Device for Real-Time Gait Feedback andTime Gait Feedback andTrainingTraining


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AIMAIM This a er resents a ne! sensing and feedback

system for a ersonal gait rehabilitation device based on !ireless

transmission of amb"lation data for real-time sensory feedback for

assistive healthcare# .


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I$TR%D&'TI%$I$TR%D&'TI%$ A ma(or goal of this a er is to develo a system that can"ltimately be available at lo! cost for "se in rehabilitation# The

system is ca able of determining common gait arameters thro"ghforce sensitive resistors )FSRs* embedded in a c"stom insole that

can be easily im lemented in a atient+s e,isting shoes# An ankle-

mo"nted microcontroller rovides sensor sam ling and data

collection ca abilities as !ell as the ability to transmit real-timegait data !irelessly via a .l"etooth serial connection# An e,tensive

a lication )a * !as develo ed for the Android mobile hone

o erating system# This enables an Android hone to receive the gait

data and "se the hone+s f"nctionality to rovide e/ective and

int"itive sensory feedback to the "ser# The a rovided three ty es

of feedback0 the same a"ditory alert l"s a similar vibrotactile alert

and a vis"al dis lay# .y acc"rately meas"ring gait data and

roviding rich feedback to the "ser the system rovides an


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Proposed system:Proposed system:

The insole sensor system made use of The insole sensor system made use offorce sensitive resistors to sample plantarforce sensitive resistors to sample plantar

pressure data. The insole was moldedpressure data. The insole was moldedfrom dimethylsiloxane, with two squarefrom dimethylsiloxane, with two squareFSRs embedded per foot one sensorFSRs embedded per foot one sensorunder forefoot, and one sensor under theunder forefoot, and one sensor under the

hind foot. This desi!n departs fromhind foot. This desi!n departs fromprevious iterations in which a layout of upprevious iterations in which a layout of upto ten FSRs per insole was used.to ten FSRs per insole was used.


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"xistin! System:"xistin! System:'"rrent systems "sed in gait rehabilitation and training incl"de force'"rrent systems "sed in gait rehabilitation and training incl"de force

lates force mats motion ca t"re systems instr"mented treadmillslates force mats motion ca t"re systems instr"mented treadmills

and insole sensor systems# Force lates and forcemats are ideal forand insole sensor systems# Force lates and forcemats are ideal for"se in stationary settings d"e to their high acc"racy b"t re1"ire"se in stationary settings d"e to their high acc"racy b"t re1"iretraining for "se and are rohibitively e, ensive and large to betraining for "se and are rohibitively e, ensive and large to beconsidered for im lementation o"tside the clinic# Instr"mentedconsidered for im lementation o"tside the clinic# Instr"mentedtreadmills are able to gather large amo"nts of ste data b"t aretreadmills are able to gather large amo"nts of ste data b"t arelimited by their controlled environment and rescribed !alkinglimited by their controlled environment and rescribed !alking

attern# In addition to stationary gait analysis systems atientattern# In addition to stationary gait analysis systems atient

mo"nted systems are available to meas"re gait arameters# Whilemo"nted systems are available to meas"re gait arameters# Whiledi/erent im lementations of these mobile systems have beendi/erent im lementations of these mobile systems have beeneval"ated and sho!n to rovide acc"rate gait data they are ofteneval"ated and sho!n to rovide acc"rate gait data they are often

rohibitively e, ensive and re1"ire com licated eri heral e1"i mentrohibitively e, ensive and re1"ire com licated eri heral e1"i mentand s eciali2ed training for "se# Given these constraints otherand s eciali2ed training for "se# Given these constraints otherresearchers have develo ed alternatives for rehabilitation# %neresearchers have develo ed alternatives for rehabilitation# %nee,am le is a novel air bladder sensor for gait analysis# This systeme,am le is a novel air bladder sensor for gait analysis# This system

!as s"bse1"ently "sed for mobile feedback "sing a c"stom device for!as s"bse1"ently "sed for mobile feedback "sing a c"stom device foranalysis and feedback# Another a roach rovided vis"al3a"ditoryanalysis and feedback# Another a roach rovided vis"al3a"ditoryfeedback to am "tees based on force sensors b"t re1"ired a desktofeedback to am "tees based on force sensors b"t re1"ired a desktocom "ter and monitor for the feedback0 the device !as "sed incom "ter and monitor for the feedback0 the device !as "sed incon("nction !ith a treadmill and !as received !ell by the am "teecon("nction !ith a treadmill and !as received !ell by the am "tees"b(ects# %ther biofeedback systems have been develo ed for balances"b(ects# %ther biofeedback systems have been develo ed for balancein older ad"lts# While one re1"ires a com "ter monitor for o erationin older ad"lts# While one re1"ires a com "ter monitor for o eration

other researchers have rovided the feedback directly "sing onboardother researchers have rovided the feedback directly "sing onboardrocessing and an array of vibortactorrocessing and an array of vibortactor


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4ro(ect descri tion4ro(ect descri tion :: The proposed chan!e in desi!n !reatly The proposed chan!e in desi!n !reatly

decreases the amount of data that are collected anddecreases the amount of data that are collected andanaly#ed, thereby simplifyin! the entire system andanaly#ed, thereby simplifyin! the entire system andincreasin! the samplin! rate. Two sensors per insoleincreasin! the samplin! rate. Two sensors per insoleare su$cient to calculate !ait timin! and provideare su$cient to calculate !ait timin! and providefeedbac% on abnormalities, and the parametersfeedbac% on abnormalities, and the parametersused to determine the user&s level of !aitused to determine the user&s level of !aitabnormality can still be e'ectively calculated,abnormality can still be e'ectively calculated,without extra and unnecessary data bein! sampled.without extra and unnecessary data bein! sampled.

The data are sampled from the insole sensors usin! The data are sampled from the insole sensors usin!the P() *+f --a micro controller. The FSR data arethe P() *+f --a micro controller. The FSR data aretransmitted from the P() usin! possible ei!ht of itstransmitted from the P() usin! possible ei!ht of itsanalo! input pins, any of which can be readanalo! input pins, any of which can be readsimultaneously. The P() micro controller is in turnsimultaneously. The P() micro controller is in turnconnected to a /lueS0(RF 1old2 /luetooth serialconnected to a /lueS0(RF 1old2 /luetooth serialpipe for data transmission to the 3ndroid smartpipe for data transmission to the 3ndroid smartphone. The /luetooth module is capable of wirelessphone. The /luetooth module is capable of wirelessserial data transmission and receipt when pairedserial data transmission and receipt when pairedwith the feedbac% application runnin! on the smartwith the feedbac% application runnin! on the smartphone.phone.


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.5%'6 DIAGRAM.5%'6 DIAGRAM

/luetooth

PressureSensor *

P()*+F --33

4

)

PressureSensor 5

6PF 7PF

Pressure

Sensor 8

PressureSensor 9

6PF 7PF

RS585

P()*+F--

RS585


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7ard!are Re1"irements4ic89f:;;a.l"etoothvibration sensorsAndroid hone#

Soft!are Re1"irements

5ang"age < =mbedded ' 'om iler < 4I' ' com iler %S < Windo!s >4#

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A Wireless Sensory Feedback Device for Real-Time Gait Gts