Published October 28, 2020 © GPL3+

Haptic Shoes

Smart Shoes: revolutionise and reinvent the lives of visually impaired people and make them move parallelly along with technology.

AdvancedFull instructions provided1,819

Things used in this project

Hardware components

ControlEverything.com Piezo Sensor

1N4007 – High Voltage, High Current Rated Diode

DC/DC Charge Pump Adjustable Voltage Regulator, 2.5V to 4V in

Arduino Mega 2560

Adafruit Analog Accelerometer: ADXL335

HC-05 Bluetooth Module

Ultrasonic Sensor - HC-SR04 (Generic)

Buzzer, Piezo

GPS Module NEO-6M

Telecontrolli Ceramic Capacitive Rain Sensor

GSM Module SIM900

Alphanumeric LCD, 16 x 2

Rotary potentiometer (generic)

Resistor 1k ohm

Electrolytic Capacitor, 0.1 µF

Development Kit Accessory, Solar Cell

Rechargeable Battery, Lithium Ion

Vibration Sensor, MiniSense 100

Speaker, Piezo

Jumper wires (generic)

Software apps and online services

Arduino IDE

MIT App Inventor

Hand tools and fabrication machines

Wire Stripper & Cutter, 32-20 AWG / 0.05-0.5mm² Solid & Stranded Wires

Soldering iron (generic)

Digilent Mastech MS8217 Autorange Digital Multimeter

Story

INTRODUCTION

The word “Haptic” has been derived from the word“Haptic Technology” wherein it can create an experience of touch by applying forces, vibrations, or motions to the user.

“Haptic Shoes” can therefore be termed as the shoes of the future which combine all the basic technological aspects to give out a much-desired solution to a problem which sometimes is left un-entertained. By means of the various sensors and their interconnection we would be able to collect data from the environment and would be able to inform the wearer of the surrounding happenings and conditions in the best possible manner. They would serve as an addition to the sixth sense of the person and would save and do the best it can in any situation be it juggling through a puddle, escaping an obstacle, analysis of his location and whereabouts to the one concerned maybe a family member or someone else. The key feature also includes the presence of GPS and GSM modules which detect the positioning of the person and if any mishap occurs would inform about the same to the one concerned.

FRONT VIEW

SIDE VIEW

WORKING OF PROJECT

THE LAYERS OF THE SHOE:

The project is divided into 3layers:

· Layer 1: It contains the location message sending part. (help button)

· Layer 2: It contains the piezoelectric layer.(generates electricity)

· Layer 3: It contains various sensors to guide the user as per the need.

LAYERS OF THE SHOE

SHOE LAYER 1

The layer 1 consists of a GPS module (Global Positioning System), GSM(Global System for Mobile Communication), Arduino Uno and a push button.

In this system, there is a help button attached to the shoe so that in a case of any emergency the user can press the switch, at that instant the current location of the user will be sent to the contacts of the user (family members and emergency services), so that help can be provided. The button provided also makes it easier for the sightless person to identify it (by touch and feel of a button).

LAYER 1

The location is fetched by the GPS module which connects with the satellite and provides latitudinal and longitudinal locations. The message is sent by the help of GSMmodule, GSM module is programmed to send the help message to the contacts provided by the user, and it is programmed using Arduino microcontroller.

1 / 2 • LOCATION SENDING FEATURE

SHOE LAYER 2

Piezoelectric materials form transducers that are able to interchange electrical energy and mechanical motion or force. These materials, therefore, can be used as mechanisms to transfer ambient motion (usually vibration) into electrical energy that may be stored and used to power other devices.

In layer 2of the shoe 15 piezoelectric transducers are used which are connected together and are placed at the pressure points of the foot, so the pressure exerted while walking will be converted into electrical quantity, further, a bridge rectifier is connected to the circuit and the generated voltage is used to charge a 3.7V battery.

LAYER 2

This layer serves the application that the energy wasted while we walk can be conserved, which makes this project environment friendly because the energy is generated while walking, and it can be further used for various application.

SHOE LAYER 3

LAYER 3

The layer 3 of the shoe consists of LCD (Liquid Crystal Display), Solar Panel, Water Sensor, Vibration Sensor, Ultrasonic Sensor, Bluetooth module, Accelerometer, Potentiometer, Arduino Mega.

For better understanding, the layer 3 working is divided into two categories:

a) It deals with the various sensors connected together and the data is sent to a self-designed app.

b)The second part has an LCD Display and water sensors connected together, to display the details in the LCD screen.

LAYER 3: PART 1

Part 1 contains Solar Panel, Vibration Sensor, Ultrasonic Sensor connected with Bluetooth module. Functions of different sensors are given below:

The ultrasonic sensor is used to detect the position of a nearby object, and if the threshold for minimum distance is reached then the user will be notified by an alarm so that collision can be prevented.

Vibration Sensor is used to detect heavy vibrations in the surroundings so that if a heavy vehicle comes across the path, a buzzer will be there to notify the person before time.

The solar panel is used to convert the solar energy into electrical quantity, and that can be further used in charging other application.

All these devices are connected to the Bluetooth module, which allows the microcontroller to connect with the mobile app and multiple sensor data can be viewed in the app for tracking.

1 / 2 • LAYER3 PART A

LAYER 3: PART 2

Part 2 contains an LCD screen, potentiometer and Water sensor connected to Arduino Mega.

The function of Water Sensor is to determine the water level, considering the case if a sightless person unknowingly puts his feet in the puddle of water then the user will be notified by an alarm, this maintains the security of the shoe system. The rest details of the project are displayed on the LCD screen.

So, these all layers together form the Haptic Shoe, providing various features like navigation and various alert mechanism system.

How App Was Designed:

The data sent by the microcontroller via Bluetooth is received by the app. The app is self-designed by the help of MIT APP INVENTOR.

1 / 2 • APP page1

APP BLOCK CODE:

HAPTIC SHOE APP BLOCK CODE

TO MAKE THE APP->

LINK:https://appinventor.mit.edu/

and install AICOMPANION app from play store to scan the QR and then use the app.

(https://play.google.com/store/apps/details id=edu.mit.appinventor.aicompanion3&hl=en_IN&gl=US)

Code

// PROGRAM	(PART 1 i.e. Layer 3)
//PROJECT NAME: HAPTIC SHOES

/*CODE FOR ****SHOE LAYER 3***** OF PROJECT WHICH INCLUDES SOME DATA SENT TO SELF BUILD APP AND OTHER DATA TO BE DISPLAYED ON LCD SCREEN.*/

/*SENSORS	INCLUDED	ARE:	BLUETOOTH	MODULE,ULTRASONIC	SENSOR,SOLAR PANEL,VIBRATION SENSOR,ACCELEROMETER,WATER SENSOR,LCD DISPLAY. */

#include <LiquidCrystal.h>
LiquidCrystal lcd(1,2,4,5,6,7);


int resval = 0; //WATER SENSOR 
int respin = A5;
int buzzPin = 13;


const int trigPin = 9;//ULTRASONIC SENSOR 
const int echoPin = 10;
long duration; int distance;

int led = 12;// vibration sensor
int vs =11;

void setup()
{ lcd.begin(16, 2);
lcd.setCursor(0, 0);
lcd.print("Haptic Shoes");
lcd.setCursor(0, 1);
lcd.print("B.tech 3rd yr EC ");
 
delay(9000);
lcd.clear();

pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT); 
pinMode(led, OUTPUT);
pinMode(vs, INPUT);
Serial.begin(9600);
}


void loop() {

//********** WATER SENSOR *************//
lcd.clear();
lcd.setCursor(0, 0);
resval = analogRead(respin);


lcd.print("WATER LEVEL:");
if (resval<=100)
{ lcd.println("Empty ");
}
else if (resval>100 && resval<=300)
{ lcd.println("Low ");
}
else if (resval>300 && resval<=330)
{ lcd.println("Medium ");
}
else if (resval>600)
{
lcd.println("High"); 
digitalWrite(buzzPin, HIGH); 
delay(1000);
digitalWrite(buzzPin, LOW);
}
 
lcd.clear();


//********** ULTRASONIC *********// 

digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH); 
delayMicroseconds(10); 
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH); 
distance= duration*0.034/2;


//********** SOLAR PANEL ***********// 
int sensorValue = analogRead(A0);
float voltage = sensorValue * (5.0 / 1023.0);


//******** VIBRATION SENSOR *******// 
long measurement =vibration();
if (measurement > 50)
{ digitalWrite(led, HIGH);
}
else{
digitalWrite(led, LOW);
}


//********** SENDING DATA TO THE APP *****************//
Serial.print(distance); //from ultasonic
Serial.print("|");
Serial.print(voltage); //from solar pannel 
Serial.print("|"); 
Serial.println(measurement); 
Serial.print("|"); //from vibration sensor
delay(2000);
 
}

long vibration(){
long measurement=pulseIn (vs, HIGH);
return measurement;
}

//***************end of code*********************//

//PART 2 i.e. (LAYER 1)

/*CODE FOR ****SHOE LAYER 1***** OFPROJECT WHICH INCLUDES SENDING OF HELP MESSAGE ON THE PRESS OF PANIC BUTTON.
SENSORS USED ARE: GSM,GPS,ARDUINO UNO,PUSH BUTTON. */


#include <SoftwareSerial.h> 
#include <TinyGPS.h>

int state = 0; 
const int pin = 9;
float gpslat, gpslon;


TinyGPS gps; 
SoftwareSerial sgps(4, 5);
SoftwareSerial sgsm(2, 3);


void setup()
{
sgsm.begin(9600); 
sgps.begin(9600);
}

void loop()
{
while (sgps.available())
{
int c = sgps.read();
 
if (gps.encode(c))
{
gps.f_get_position(&gpslat, &gpslon);
}
}

if (digitalRead(pin) == HIGH && state == 0)
{ sgsm.print("\r");
delay(1000); 
sgsm.print("AT+CMGF=1\r"); 
delay(1000);
sgsm.print("AT+CMGS=\"+919718612856\"\r"); 
delay(1000);

sgsm.print("Latitude :"); 
sgsm.println(gpslat, 6); 
sgsm.print("Longitude:"); 
sgsm.println(gpslon, 6);

sgsm.print("http://maps.google.com/maps?q=loc:");
sgsm.print(gpslat, 6);
sgsm.print(",");
sgsm.print(gpslon, 6); 
delay(1000); 
sgsm.write(0x1A); 
delay(1000);
state = 1;
}

if (digitalRead(pin) == LOW)
{ state = 0;
}

}

//************************* END OF CODE *********************\\