Shoe Attachable Aid for Visually Impaired People (SAAVIP)

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04 Oct, 2021

A Prototype of SAAVIP

A Prototype of SAAVIP

Obsatcles/Trenches warnning System for Visually Impaired People

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What is our project?

SAAVIP is a small specially designed 3-D printed device that works using Arduino based interface, including Arduino nano, ultrasonic sensor, infrared sensor, a vibrating motor, a Bluetooth module, and a buzzer. SAAVIP can rest on the top of any shoe effortlessly and warn the user using either haptic feedback or using a buzzer and by connecting through the Bluetooth module to the user's wearable devices like fitness bands or smartwatches. We have analyzed the normal walking patterns of people, (i.e. Normal distance of their foot from the ground and their angle of inclination towards the ground in various conditions) then we programmed the nano using that data, afterwards, we made several changes to the angles of sensors in the body of SAAVIP and the range of the sensors. We had also studied various types of Shoes and other footwear.


Working:  Ultrasonic sensor’s transmitter emits ultrasonic waves which strike back and are received by the receiver if there is a rigid ground/surface ahead and if it doesn’t get back the signal then it would mean that there is a trench/step/a puddle etc. thus warns the user through beeps or vibrations. The Infrared sensor’s transmitter emits the infrared rays which if strikes back and are received by the receiver means that there is some obstacle in the way and if not, then the way is clear (Warnings are different in case of trenches and obstacles)

Also, we can programme SAAVIP so that it doesn’t keep beeping when we are standing near a cash counter, on an escalator, etc.

We made sure to see that the body of SAAVIP is robust and can withstand the fury of nature and yet be as compact and light-weighted as possible along with a very affordable price.

The 3-D printed body was specially designed so that it can withstand force from all directions.

SAVVIP can be used by visually impaired people to find the obstacles and the trenches coming in the way and thus can warn the user about it.

There are white canes and various other devices available but they can’t tell trenches from a distance of nearly 3.5 feet, also they can be uncomfortable to use the whole day as they are not so portable and lightweight and we always need to hold on to them.

We can also make SAVVIP a 360-degree obstacle warning system for visually impaired people by making a few changes to the main body and attaching a few more sensors on that.

For making SAAVIP we considered making it as affordable as possible without compromising on the quality side. (approx. 12 USD/ Rs. 900)

To use SAVVIP we developed a system in which we need to attach a plastic base having Velcro on the top and then we attached the corresponding Velcro to the base of the SAAVIP in order to provide a better fit we made the plastic base slightly flexible.

The main advantage of SAAVIP along with its affordability is its comfortableness, many of our team members have spent 3-5 hours testing it. SAAVIP being light in weight (just 250-300 grams feels like just a shoe) its dimensions are also very small (3*5*7 cm)


What problem does our project solve?

1. Warns visually impaired people from the obstacles in front as well as about the trenches.

2. SAAVIP is very comfortable and lightweight (250-300 grams) 

3. Can be used using a 9V battery or a rechargeable battery. 

4. The range for detecting trenches: 3.5 feet to 4 feet 

5. The range for detecting steps: 2 to 3 feet [ Ranges of sensors can be increased by using a high level of sensors and by replacing the IR sensor with the Ultrasonic sensor] 

6. Easily affordable (approx. $12 USD / INR 900 ). Can be used on various types of footwear. 

7. With further developments we can even make SAAVIP a 360-degree obstacle avoiding system.

What is the current state of our sector?

Currently, SAAVIP is in its prototype stage, SAVVIP would be serving in the field of Assistive technologies.


Who is working on this project? 

Right now I and HCDI (Human Co-Design Initiative), an initiative by MIT professor Kyle Keane are working on this project earlier me and my colleagues from my previous school's robotics lab were working on this.


More about Tatsat Shah

I am a student of VJ Modi school, Rajkot. Currently studying in class 11th and preparing for engineering entances taken in India as well as for SAT. My main aim is to make useful technology available at an economical rate. I have made various projects that would help people, like a mini spy quadcopt...

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